EP0938968A1 - Method and device to make seals for bags - Google Patents

Method and device to make seals for bags Download PDF

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Publication number
EP0938968A1
EP0938968A1 EP99400443A EP99400443A EP0938968A1 EP 0938968 A1 EP0938968 A1 EP 0938968A1 EP 99400443 A EP99400443 A EP 99400443A EP 99400443 A EP99400443 A EP 99400443A EP 0938968 A1 EP0938968 A1 EP 0938968A1
Authority
EP
European Patent Office
Prior art keywords
profiles
sealing film
film
strips
closure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP99400443A
Other languages
German (de)
French (fr)
Inventor
Steven Ausnit
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Flexico France SARL
Original Assignee
Flexico France SARL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Flexico France SARL filed Critical Flexico France SARL
Publication of EP0938968A1 publication Critical patent/EP0938968A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
    • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
    • B65D33/2541—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor characterised by the slide fastener, e.g. adapted to interlock with a sheet between the interlocking members having sections of particular shape
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B19/00—Slide fasteners
    • A44B19/10—Slide fasteners with a one-piece interlocking member on each stringer tape
    • A44B19/16—Interlocking member having uniform section throughout the length of the stringer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/813—Applying closures
    • B31B70/8131—Making bags having interengaging closure elements
    • B31B70/8132—Applying the closure elements in the machine direction

Definitions

  • the present invention relates to the field of sachets comprising closure strips with male and female closure profiles complementary.
  • the closure strip is U-shaped according to the cross section of the profiles taken in the direction of their length. There are two profiles. Each profile is located on a branch of the U. One of these branches is welded to a wall of a bag, so that by tightening the branches of the U one on the other, the profiles close on all two walls.
  • US 3,164,186 describes a sachet provided with a funnel comprising a closure strip.
  • a tubular film is welded to this closure strip, so as to line the inner wall of the funnel portion provided with this band.
  • Re 34 554 also describes closure strips provided with one or two sealing films. These films are welded to the strips or coextruded with them and form a seal between the complementary profiles, when these are engaged one in the other.
  • the object of the invention is to provide a method and a device for sealing additional male or female profiles already engaged in each other.
  • the method and the device according to the invention weld an edge of the sealing film on at least one of the closing strips, after this film has been introduced between the profiles.
  • the method and the device according to the invention are used to introduce a sealing film between two strips of closure each providing a sheet capable of forming a bag wall. More particularly, this sealing film can be introduced between the profiles of a double closing device.
  • the method according to the invention is characterized by the fact that at least one closure strip is removed for completely clear the space to the right of the other strip (s) closing.
  • the device for this particular embodiment of the process then comprises guide means for spreading at least one closure strip to completely clear the space in front of the or other closure strips.
  • the maximum angle between the strips of closing apart from each other can then be approximately 90 °.
  • the invention relates to a method and a device for introducing the sealing film in the form of a sheet simple between profiles.
  • the invention relates to a method and a device for introducing between profiles a sealing film having its lateral parts folded longitudinally on itself, to form a double sheet.
  • the invention also relates to a closure device with profiles or a bag fitted with such a device, characterized in that it comprises a sealing film introduced between the profiles according to the method of the present invention.
  • the method according to the invention is used to form sachets 300 provided with a film sealing 100.
  • a tube 200 provided with a closing device simple 3, feeds a device 1 for forming sachets, in accordance with the present invention.
  • Such a tube 200 is shown in Figure 1. It includes a folded film on itself, to form a lower sheet 204 and an upper sheet 206. Each of these sheets 204 and 206, capable of forming a wall of a bag 300, respectively has a lower closure strip 4 and upper 6. Each strip 4, 6 is welded or coextruded on the edge longitudinal free of each sheet 204, 206.
  • the lower strip 4 comprises a female profile 7 in the form of a groove.
  • the upper band 6 comprises a male section 9, capable of engaging in the female section 7.
  • the shape of sections 7 and 9 can be of any shape known from the skilled person. There can also be several profiles 7, 9 on each strip 4, 6. Another form of tube 200 will be described later.
  • FIG. 2 shows a device 1 for forming bags, fitted with a set 10 for inserting a sealing film 100 between profiles 7 and 9.
  • the means for forming sachets and introducing the sealing film 100 are designated by letters from A to N.
  • the tube 200 is unwound from the unwinding means A. It is then routed towards the assembly 10 for inserting the sealing film 100.
  • This assembly 10 inserting the sealing film 100 comprises guide means B, C, D, E, H, I, J, K, means for positioning the sealing film G and welding means L.
  • the sealing film 100 is unwound from of a coil 110 by unwinding means F.
  • FIG 3 shows in more detail the device 10 of introduction.
  • This device 10 comprises several grooved rollers 12, 14, 16, 18 aligned. It also includes tumblers 20, 22, 24 to guide the upper strip 6, provided with the male profile 9, and intended for clear a space to the right of the strip 4 provided with the female profile 7.
  • the male 9 and female 7 sections are not not shown.
  • the tube 200 fitted with bands 4 and 6 passes between the first guide means B ( Figures 3a and 3b), then is routed to separation means C of the profiles ( Figures 3a and 3c).
  • bands 4 and 6 are separated by a device separator 29 and guided by flat-edged casters 13 and 27.
  • the separator device 29 comprises two grooves. These gorges have radially opposite openings and the respective bottoms of these grooves converge towards each other in the opposite direction to the movement of profiles 7, 9.
  • a female profile is positioned 7 or male 9.
  • the second guide means D are composed of a grooved caster 14 and a flat-edged caster 15, to.utes two analogues to the grooved caster and the flat edge caster first guide means B.
  • the third guide means E are composed of a grooved caster 20 and a flat edge caster 21. As illustrated in Figure 3a, all of these two rollers 20 and 21 is inclined, both relative to the longitudinal plane and relative to the plane transverse of the assembly 10 ( Figure 3a, Figure 3e and Figure 4). The angle of inclination of these rollers relative to each of these planes is by 45 ° example.
  • the sealing film 100 arrives vertically and transversely by relative to the direction of travel of the tube 200.
  • the sealing film 100 is guided and positioned on the lower strip 4 by means of positioning G.
  • the positioning means G consist of a roller positioning 30.
  • This roller 30 is a cylinder of revolution whose axis of revolution is parallel to the plane of the closure strip 4 and perpendicular to the movement of this lower strip 4.
  • the surface generator of external revolution of this cylinder grazes the profile 7 of the strip 4.
  • the positioning means G can also be constituted a leaning and / or curved blade having a convex surface at contact of the sealing film 100. Other geometries are still possible for these positioning means G.
  • the film 100 and the lower strip 4 are conveyed to fourth guide means H.
  • These fourth guide means H consist of a grooved caster 16 and a flat edge caster 17. They are similar to the first guide means B and to the second guide means D. As shown in FIG. 3f, these means of guide H allow the sealing film 100 to be applied to the strip 4 of closing.
  • the upper strip 6 and the upper sheet 206 are held at their free end in position vertical and arrive at the level of the fifth guide means I (FIG. 3a, figure 5.
  • the planes of the lower 4 and upper 6 bands then make a angle ⁇ between them, which is at most equal to approximately 90 °. We thus spreads the upper strip 6 to completely clear the space necessary, in line with the latter, for positioning the film sealing 100 on the lower strip 4.
  • the strip upper 6 and sheet 206 are gradually returned to position on the lower strip 4 and lower sheet 204 thanks to sixth means guide J, composed of a grooved caster 24 and a edge caster flat 25, and which are similar to the third guide means E.
  • the male profile 9 is re-engaged in the female profile 7 at the level guide means K (FIG. 6, in this figure the guide means J are shown in dotted lines to signify that they are not in the same plane as the guide means K).
  • These means K are composed of a grooved caster 18 and a flat-edged caster 19, both analogous to the first, third and fourth casters guide means B, D, H already described. From these guide means K, the sealing film 100 is inserted between the male 7 and female 9 sections lower 4 and upper 6 bands.
  • All of the lower 4, upper 6, and sheet bands lower 204 and upper 206 again resting on each other, is routed to welding means L.
  • These welding means L are composed, for example, of a pressure bar 40 and of means heaters 45, the pressure bar 40 applying the heating means 45 on the sealing film 100 and to weld the film 100 on the lower strip 4 ( Figure 7a).
  • the film 100 is welded to the strip upper 6, thanks to a pressure bar 40, and heating means 45 for pressing and heating together the film 100 and the strip upper 6 ( Figure 7b).
  • Other welding means L will be described more far.
  • the tube 200 can then be routed to cutting means M to be transformed into bags 300, in a conventional manner.
  • the bags 300 are then stacked at a stacking station N.
  • the positioning means G can consist of rollers positioning 32, 34, 36, 38 ( Figures 8 and 9). These rollers 32, 34, 36, 38 have a shape similar to that of the rollers 30 already described. Such as shown in Figures 8 and 9, the rollers 36, 38 are oriented with their axis of revolution parallel to the movement of the lower strip 4. A slight space is provided between these rollers 36, 38 so as to guide the sealing film 100 arriving transversely to the displacement of the strip 4. Downstream of the rollers 36, 38, the sealing film 100 undergoes a 90 ° twist so as to extend across its width between the rollers 32, 34.
  • rollers 32, 34 have their axes included in a plane parallel to that of strip 4 and perpendicular to the direction of movement of this strip 4.
  • the space to be cleared to the right of the strip 4 for bring the sealing film 100 in contact with it is less than that shown in Figure 5.
  • the guide means I can be inclined, for example by an angle of 45 °, above the lower strip 4. This makes it possible to reduce the torsion imposed on the upper strip 6, and to reduce the overall dimensions of the assembly 10.
  • the positioning means G comprise at least one roller 30 ,.
  • Figure 10a is shown a film seal 100 folded in a U around the roller 30.
  • the plans of the parts of the film 100 downstream and upstream of the roll 30 are parallel to that of the lower strip 4.
  • the direction of arrival of the film 100 on the roll 30 and that of departure make an angle ⁇ , which can be more or less open.
  • This configuration can further reduce angle a, between bands lower 4 and- upper 6. It has been described above a mode of implementation work of the method according to the invention for introducing a sealing film 100 between two closing strips 4, 6 of a simple closing device 3 linked to sheets 204, 206 capable of forming the walls of a bag 300.
  • the method for forming a closure strip with seal, described above can be used to equip 200 tubes with simple closing devices 3 as tubes 200 fitted with double closure 5.
  • a double device 5 is shown in Figure 11. It includes a lower closure strip 4, and two upper strips of closure 6.
  • the lower strip 4 is provided with two female sections 7.
  • the two female sections 7 are spaced from one another over the width of the strip 4.
  • the upper strips 6 are each provided with a male profile.
  • the two upper bands 6 are separated from each other by a space 8 extending longitudinally with respect to the profiles 9.
  • the lateral parts of bands 4 and 6, located on the other side of the profiles by relative to space 8, are respectively linked to lower sheets and upper 204 and 206 able to form the walls of a bag 300.
  • This double closing device 5 is symmetrical with respect to space 8.
  • the sheets 204 and 206 may form only one sheet folded back on itself, parallel to its longitudinal direction, to form a U-shaped profile cross section, or they can be welded to each other. In these two case, two symmetrical tubes are formed with respect to space 8.
  • the process according to the invention can optionally also allow introduce a sealing film 100 between two strips 4, 6 and weld the sealing film 100 to closure strips, which will only be welded to a bag 300, or a sheet capable of forming such a bag 300, only later.
  • FIG. 12 illustrates an example of bands 4, 6 which are not still attached to sheets 204, 206 capable of forming a bag 300.
  • These bands 4, 6 constitute a double closure device 5 which differs from that shown in FIG. 11, by the fact that the lateral parts of the bands 4 and 6, located on the other side of the profiles with respect to the space 8, meet to form a U-shaped profile in a cross section.
  • Each of the two sets of bands 4, 6 located on either side of the space 8, can be subsequently welded to walls of bags 300 of usual for the skilled person.
  • Figure 13 schematically illustrates how to weld a film 100 or single seal on a double closing device.
  • Figures 13b and 13d show cross sections made at level of the welding means L.
  • Single and double sealing films 100 are shown in cross section, respectively in Figures 13a and 13c.
  • the film 100 double of Figure 11c is formed by the folding in on itself, in the longitudinal direction of these lateral parts, while leaving space between the free longitudinal edges of the strip, in the middle zone of the latter.
  • the film sealing 100 is welded by its longitudinal central zone only on the lower strip 4.
  • the sealing film 100 is welded by its longitudinal central zone to the lower strip 4 and by two side parts on the upper strip 6.
  • the welding operation is carried out by a welding bar 42, which presses, at the space 8, the sealing film 100 on the upper face of the lower strip 4 against an anvil 44.
  • the bar 42 is movable in a back and forth movement perpendicular to the plane of movement in which the lower strip moves 4.
  • the bar 42 has a flat face parallel to the plane of the lower strip 4. This flat face is perpendicular to the direction of pressure application necessary for welding and presses the film 100 and the lower strip 4 against anvil 44.
  • the sealing bar 42 is provided with two shoulders 41, 43.
  • the shoulders 41, 43 extend perpendicularly, on either side of the end of the bar 42, comprising the flat face parallel to the plane of the lower strip 4.
  • These shoulders 41, 43 run along the bar 42 over the entire length thereof in the direction parallel to the movement of the lower strip 4.
  • Other welding bars 46 flank the bar 42. They have a flat face perpendicular to the direction of application of the pressure welding via bar 42. These other welding bars 46 allow the longitudinal free edges of the strip to be welded the film 100, on the underside of the upper strip 6, by pressing them together on the shoulders 41, 43.
  • a simple 100 sealing film has the following advantages: provides a seal over the entire length of the sections 7, 9; if he is in very fusible material (for example EVA), it encapsulates the ends welded profiles 7, 9 to make them also waterproof.
  • EVA very fusible material
  • a double film 100 also makes it possible to form an opening indicator. If it is long enough it can also, when pouring product contained in a bag 300, turn over to protect sections 7, 9 and possibly also form a pouring spout or a funnel.
  • FIG. 14 illustrates welding means L compatible with this embodiment of the invention.
  • Device 1 for forming watertight closures according to the invention then comprises a pair of welding means similar to those described above and illustrated by figure 7.
  • sealing bars 42 and 46 described above could be advantageously replaced by rollers, when continuous welding sealing film 100 on a closure device 3, 5 is desired.

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Abstract

The process for sealing a sachet with a seal comprises moving a set of two closing bands (4,6), which have complementary profiles engaged in each other, in a longitudinal direction. A sealing film (100) is independently brought to a positioning station (G). The complementary band profiles are disengaged from each other and the two bands are progressively separated. The film is then introduced between the bands so that it is parallel to one of the bands. The bands are then re-clamped on each other until the profiles are engaged in each other together with the film.

Description

La présente invention concerne le domaine des sachets comportant des bandes de fermeture avec des profilés de fermeture mùle et femelle complémentaires.The present invention relates to the field of sachets comprising closure strips with male and female closure profiles complementary.

L'introduction d'un film entre des profilés complémentaires pour rendre étanche une bande de fermeture est déjà connue.The introduction of a film between complementary profiles for sealing a closure strip is already known.

Ainsi, dans DK 90 167, la bande de fermeture est en forme de U selon la section transversale aux profilés pris dans le sens de leur longueur. Les profilés sont au nombre de deux. Chaque profilé est situé sur une branche du U. L'une de ces branches est soudée sur une paroi d'un sachet, de maniÚre à ce qu'en resserrant les branches du U l'une sur l'autre, les profilés se referment sur l'ensemble des deux parois.Thus, in DK 90 167, the closure strip is U-shaped according to the cross section of the profiles taken in the direction of their length. There are two profiles. Each profile is located on a branch of the U. One of these branches is welded to a wall of a bag, so that by tightening the branches of the U one on the other, the profiles close on all two walls.

US 3 164 186 décrit un sachet muni d'un entonnoir comprenant une bande de fermeture. Un film tubulaire est soudé à cette bande de fermeture, de façon à venir tapisser la paroi interne de la portion d'entonnoir munie de cette bande. En engageant les profilés l'un dans l'autre, le film vient former un joint d'étanchéité entre les profilés complémentaires.US 3,164,186 describes a sachet provided with a funnel comprising a closure strip. A tubular film is welded to this closure strip, so as to line the inner wall of the funnel portion provided with this band. By engaging the profiles together, the film forms a seal between the complementary profiles.

Re 34 554 décrit aussi des bandes de fermeture munies d'un ou deux films d'étanchéité. Ces films sont soudés sur les bandes ou coextrudés avec elles et viennent former un joint d'étanchéité entre les profilés complémentaires, lorsque ceux-ci sont engagés l'un dans l'autre.Re 34 554 also describes closure strips provided with one or two sealing films. These films are welded to the strips or coextruded with them and form a seal between the complementary profiles, when these are engaged one in the other.

Mais ces documents n'enseignent pas comment rendre étanches des bandes de fermeture dont les profilés complémentaires mùles et femelles sont déjà engagés l'un dans l'autre.But these documents do not teach how to seal closure strips including complementary male and female profiles are already engaged in each other.

Le but de l'invention est de fournir un procédé et un dispositif pour rendre étanches des profilés complémentaires mùle ou femelle déjà engagés l'un dans l'autre.The object of the invention is to provide a method and a device for sealing additional male or female profiles already engaged in each other.

Plus précisément, l'invention est un procédé et un dispositif pour former une fermeture avec un joint, comprenant les étapes consistant à:

  • entraĂ­ner un ensemble comprenant deux bandes de fermeture munies de profilĂ©s complĂ©mentaires engagĂ©s l'un dans l'autre, dans un dĂ©placement parallĂšle au sens longitudinal des bandes ; et
  • acheminer indĂ©pendamment des bandes de fermeture, un film d'Ă©tanchĂ©itĂ© jusqu'Ă  des moyens de positionnement.
More specifically, the invention is a method and a device for forming a closure with a seal, comprising the steps consisting in:
  • drive an assembly comprising two closure strips provided with complementary profiles engaged one inside the other, in a movement parallel to the longitudinal direction of the strips; and
  • independently convey closure strips, a sealing film to positioning means.

Il est caractérisé en ce qu'il comprend en outre, les étapes consistant à:

  • dĂ©sengager les profilĂ©s l'un de l'autre ;
  • Ă©carter progressivement les deux bandes de fermeture ;
  • introduire et positionner Ă  l'aide des moyens de positionnement, le film entre les bandes de fermeture, de maniĂšre Ă  ce que son dĂ©placement en aval des moyens de positionnement soit parallĂšle Ă  celui de l'une des bandes de fermeture ; et
  • resserrer les bandes l'une sur l'autre jusqu'Ă  ce que les profilĂ©s s'engagent l'un dans l'autre avec le film d'Ă©tanchĂ©itĂ© entre eux.
It is characterized in that it further comprises the steps consisting in:
  • disengage the profiles from each other;
  • gradually move the two closure strips apart;
  • introduce and position using the positioning means, the film between the closure strips, so that its movement downstream of the positioning means is parallel to that of one of the closure strips; and
  • tighten the strips one on top of the other until the profiles engage with each other with the sealing film between them.

L'invention concerne aussi un dispositif pour la mise en oeuvre de ce procédé. Ce dispositif comprend:

  • un systĂšme d'entraĂ­nement de bandes de fermeture munies de profilĂ©s complĂ©mentaires engagĂ©s l'un dans l'autre, dans un dĂ©placement parallĂšle au sens longitudinal de la bande ;
  • des moyens de positionnementd'un film d'Ă©tanchĂ©itĂ© entre les bandes de fermeture ;
  • un dispositif de sĂ©paration des profilĂ©s, pour dĂ©sengager les profilĂ©s l'un de l'autre ;
  • des moyens de guidage pour Ă©carter les bandes de fermeture l'une de l'autre, progressivement jusqu'aux moyens de positionnement ;
  • des moyens pour resserrer les bandes l'une sur l'autre, jusqu'Ă  ce que les profilĂ©s s'engagent l'un dans l'autre, avec le film entre eux.
The invention also relates to a device for implementing this method. This device includes:
  • a system for driving closure strips provided with complementary profiles engaged one inside the other, in a movement parallel to the longitudinal direction of the strip;
  • means for positioning a sealing film between the closure strips;
  • a profile separation device for disengaging the profiles from one another;
  • guide means for moving the closure strips apart from each other, progressively up to the positioning means;
  • means for tightening the strips one on the other, until the profiles engage one in the other, with the film between them.

Avantageusement, le procédé et le dispositif selon l'invention permettent de souder un bord du film d'étanchéité sur au moins une des bandes de fermeture, aprÚs que ce film ait été introduit entre les profilés.Advantageously, the method and the device according to the invention weld an edge of the sealing film on at least one of the closing strips, after this film has been introduced between the profiles.

Avantageusement encore, le procĂ©dĂ© et le dispositif selon l'invention sont utilisĂ©s pour introduire un film d'Ă©tanchĂ©itĂ© entre deux bandes de fermeture munissant chacune un feuillet apte Ă  former une paroi de sachet. Plus particuliĂšrement, ce film d'Ă©tanchĂ©itĂ© peut ĂȘtre introduit entre les profilĂ©s d'un dispositif de fermeture double.Advantageously also, the method and the device according to the invention are used to introduce a sealing film between two strips of closure each providing a sheet capable of forming a bag wall. More particularly, this sealing film can be introduced between the profiles of a double closing device.

Dans une variante avantageuse, le procĂ©dĂ© selon l'invention est caractĂ©risĂ© par le fait que l'on Ă©carte au moins une bande de fermeture pour dĂ©gager complĂštement l'espace au droit de la ou des autres bandes de fermeture. Le dispositif pour ce mode de mise en oeuvre particulier du procĂ©dĂ© comprend alors des moyens de guidage pour Ă©carter au moins une bande de fermeture afin de dĂ©gager complĂštement l'espace au droit de la ou des autres bandes de fermeture. L'angle maximum entre les bandes de fermeture Ă©cartĂ©es l'une de l'autre peut alors ĂȘtre approximativement de 90°.In an advantageous variant, the method according to the invention is characterized by the fact that at least one closure strip is removed for completely clear the space to the right of the other strip (s) closing. The device for this particular embodiment of the process then comprises guide means for spreading at least one closure strip to completely clear the space in front of the or other closure strips. The maximum angle between the strips of closing apart from each other can then be approximately 90 °.

Dans une variante avantageuse, l'invention concerne une méthode et un dispositif pour introduire le film d'étanchéité sous forme d'un feuillet simple entre des profilés.In an advantageous variant, the invention relates to a method and a device for introducing the sealing film in the form of a sheet simple between profiles.

Selon encore une autre variante, l'invention concerne une mĂ©thode et un dispositif pour introduire entre des profilĂ©s, un film d'Ă©tanchĂ©itĂ© ayant ses parties latĂ©rales repliĂ©es longitudinalement sur lui-mĂȘme, pour former un feuillet double.According to yet another variant, the invention relates to a method and a device for introducing between profiles a sealing film having its lateral parts folded longitudinally on itself, to form a double sheet.

L'invention concerne aussi un dispositif de fermeture avec profilés complémentaires ou un sachet muni d'un tel dispositif, caractérisé en ce qu'il comprend un film d'étanchéité introduit entre les profilés selon le procédé de la présente invention.The invention also relates to a closure device with profiles or a bag fitted with such a device, characterized in that it comprises a sealing film introduced between the profiles according to the method of the present invention.

D'autres aspects, avantages et buts de l'invention apparaítront à la lecture de la description détaillée qui suit.Other aspects, advantages and aims of the invention will become apparent from the reading of the detailed description which follows.

On comprendra mieux l'invention à l'aide des références aux dessins sur lesquels:

  • la figure 1 reprĂ©sente schĂ©matiquement, en coupe et en vue perspective, un tube composĂ© d'un film pour faire des sachets sur le dispositif et selon le procĂ©dĂ© conformes Ă  l'invention ;
  • la figure 2 reprĂ©sente schĂ©matiquement, en coupe longitudinale, un dispositif de formation de sachets, conforme Ă  la prĂ©sente l'invention, Ă©quipĂ© d'un ensemble, pour introduire un film d'Ă©tanchĂ©itĂ© entre profilĂ©s complĂ©mentaires ;
  • la figure 3 reprĂ©sente schĂ©matiquement, en vue de cĂŽtĂ© et de maniĂšre plus dĂ©taillĂ©e, un ensemble d'insertion d'un film d'Ă©tanchĂ©itĂ© entre profilĂ©s complĂ©mentaires tel que celui Ă©quipant le dispositif de fabrication de sachets de la figure 2 ; la figure 3a reprĂ©sente en vue longitudinale, de cĂŽtĂ© par rapport au dĂ©placement des profilĂ©s, des moyens B Ă  K de guidage des profilĂ©s et de positionnement du film d'Ă©tanchĂ©itĂ© de l'ensemble d'insertion du film d'Ă©tanchĂ©itĂ© entre les profilĂ©s complĂ©mentaires ; les figures 3b, 3c, 3d, 3f et 3h reprĂ©sentent schĂ©matiquement, en coupe transversale, par rapport au dĂ©placement des profilĂ©s, des moyens de guidage de l'ensemble d'insertion de la figure 3a ; les figures 3e et 3g reprĂ©sentent schĂ©matiquement en Ă©lĂ©vation latĂ©rale des moyens de guidage de l'ensemble d'insertion de la figure 3a ;
  • la figure 4 reprĂ©sente schĂ©matiquement et en vue transversale par rapport au dĂ©placement des profilĂ©s, les moyens de guidage D et E de profilĂ©s.
  • la figure 5 reprĂ©sente schĂ©matiquement et en vue transversale par rapport au dĂ©placement des profilĂ©s, les moyens de guidage H et J ainsi que les moyens de positionnement G du film d'Ă©tanchĂ©itĂ© ;
  • la figure 6 reprĂ©sente schĂ©matiquement et en vue transversale par rapport au dĂ©placement des profilĂ©s, les moyens de guidage J et K ;
  • la figure 7 reprĂ©sente schĂ©matiquement en coupe des moyens de soudage L ;
  • la figure 8 reprĂ©sente schĂ©matiquement et en vue transversale par rapport au dĂ©placement des profilĂ©s, une variante des moyens de guidage et de positionnement reprĂ©sentĂ©s Ă  la figure 5 ;
  • la figure 9 reprĂ©sente schĂ©matiquement et vus de dessus les moyens de positionnement G de la variante reprĂ©sentĂ©e Ă  la figure 6 ;
  • la figure 10 reprĂ©sente schĂ©matiquement une autre variante des moyens de positionnement G ; la figure 8a reprĂ©sente une vue de dessus de tels moyens ; la figure 8b reprĂ©sente une vue de cĂŽtĂ© en perspective de tels moyens ;
  • la figure 11 reprĂ©sente schĂ©matiquement en coupe transversale par rapport Ă  sa dimension longitudinale un tube muni d'un double dispositif de fermeture sur lequel peut ĂȘtre mis en oeuvre le procĂ©dĂ© selon l'invention ;
  • la figure 12 reprĂ©sente schĂ©matiquement en coupe transversale par rapport Ă  sa dimension longitudinale un double dispositif de fermeture sur lequel peut ĂȘtre mis en oeuvre le procĂ©dĂ© selon l'invention ;
  • la figure 13 reprĂ©sente schĂ©matiquement en coupe transversale, par rapport au dĂ©placement des profilĂ©s, des films d'Ă©tanchĂ©itĂ© et les moyens correspondants de soudure des films d'Ă©tanchĂ©itĂ© sur les bandes de fermeture ; la figure 11a reprĂ©sente un film d'Ă©tanchĂ©itĂ© simple ; la figure 11b reprĂ©sente le soudage du film d'Ă©tanchĂ©itĂ© simple reprĂ©sentĂ© Ă  la figure 11a ; la figure 11c reprĂ©sente un film d'Ă©tanchĂ©itĂ© double ; la figure 11d reprĂ©sente le soudage du film d'Ă©tanchĂ©itĂ© double de la figure 11c ; et
  • la figure 14 reprĂ©sente schĂ©matiquement, en coupe, une variante des moyens de soudage L.
The invention will be better understood using references to the drawings in which:
  • Figure 1 shows schematically, in section and in perspective view, a tube composed of a film for making sachets on the device and according to the method according to the invention;
  • FIG. 2 schematically represents, in longitudinal section, a device for forming bags, in accordance with the present invention, equipped with an assembly, for introducing a sealing film between complementary profiles;
  • Figure 3 shows schematically, in side view and in more detail, an assembly for inserting a sealing film between complementary profiles such as that fitted to the device for manufacturing bags of Figure 2; FIG. 3a shows in longitudinal view, from the side with respect to the displacement of the profiles, means B to K for guiding the profiles and positioning the sealing film of the assembly for inserting the sealing film between the complementary profiles ; Figures 3b, 3c, 3d, 3f and 3h show schematically, in cross section, relative to the displacement of the profiles, guide means of the insertion assembly of Figure 3a; Figures 3e and 3g show schematically in side elevation of the guide means of the insertion assembly of Figure 3a;
  • Figure 4 shows schematically and in transverse view with respect to the displacement of the profiles, the guide means D and E of profiles.
  • Figure 5 shows schematically and in transverse view relative to the displacement of the profiles, the guide means H and J as well as the positioning means G of the sealing film;
  • Figure 6 shows schematically and in transverse view relative to the displacement of the profiles, the guide means J and K;
  • FIG. 7 schematically shows in section welding means L;
  • Figure 8 shows schematically and in transverse view relative to the displacement of the profiles, a variant of the guide and positioning means shown in Figure 5;
  • Figure 9 shows schematically and seen from above the positioning means G of the variant shown in Figure 6;
  • FIG. 10 schematically represents another variant of the positioning means G; Figure 8a shows a top view of such means; Figure 8b shows a side perspective view of such means;
  • Figure 11 shows schematically in cross section with respect to its longitudinal dimension a tube provided with a double closure device on which the method according to the invention can be implemented;
  • Figure 12 shows schematically in cross section with respect to its longitudinal dimension a double closure device on which the method according to the invention can be implemented;
  • Figure 13 shows schematically in cross section, with respect to the displacement of the profiles, sealing films and the corresponding means of welding the sealing films on the closure strips; Figure 11a shows a simple sealing film; Figure 11b shows the welding of the simple sealing film shown in Figure 11a; Figure 11c shows a double sealing film; Figure 11d shows the welding of the double sealing film of Figure 11c; and
  • FIG. 14 schematically represents, in section, a variant of the welding means L.

Selon un mode de mise en oeuvre préférentiel, le procédé selon l'invention est utilisé pour former des sachets 300 munis d'un film d'étanchéité 100. A cette fin, un tube 200, muni d'un dispositif de fermeture simple 3, alimente un dispositif 1 de formation de sachets, conforme à la présente invention.According to a preferred embodiment, the method according to the invention is used to form sachets 300 provided with a film sealing 100. To this end, a tube 200, provided with a closing device simple 3, feeds a device 1 for forming sachets, in accordance with the present invention.

Un tel tube 200 est reprĂ©sentĂ© Ă  la figure 1. Il comprend un film repliĂ© sur lui-mĂȘme, pour former un feuillet infĂ©rieur 204 et un feuillet supĂ©rieur 206. Chacun de ces feuillets 204 et 206, apte Ă  former une paroi d'un sachet 300, est muni respectivement d'une bande de fermeture infĂ©rieure 4 et supĂ©rieure 6. Chaque bande 4, 6 est soudĂ©e ou coextrudĂ©e sur le bord libre longitudinal de chaque feuillet 204, 206. La bande infĂ©rieure 4 comprend un profilĂ© femelle 7 en forme de gorge. La bande supĂ©rieure 6 comprend un profilĂ© mĂąle 9, apte Ă  s'engager dans le profilĂ© femelle 7. La forme des profilĂ©s 7 et 9 peuvent ĂȘtre de n'importe quelle forme connue par l'homme du mĂ©tier. Il peut aussi exister plusieurs profilĂ©s 7, 9 sur chaque bande 4, 6. Une autre forme de tube 200 sera dĂ©crite plus loin.Such a tube 200 is shown in Figure 1. It includes a folded film on itself, to form a lower sheet 204 and an upper sheet 206. Each of these sheets 204 and 206, capable of forming a wall of a bag 300, respectively has a lower closure strip 4 and upper 6. Each strip 4, 6 is welded or coextruded on the edge longitudinal free of each sheet 204, 206. The lower strip 4 comprises a female profile 7 in the form of a groove. The upper band 6 comprises a male section 9, capable of engaging in the female section 7. The shape of sections 7 and 9 can be of any shape known from the skilled person. There can also be several profiles 7, 9 on each strip 4, 6. Another form of tube 200 will be described later.

Sur la figure 2, est représenté un dispositif 1 de formation de sachets, muni d'un ensemble 10 d'insertion d'un film d'étanchéité 100 entre les profilés 7 et 9. Les moyens de formation de sachets et d'introduction du film d'étanchéité 100 sont désignés par des lettres de A à N. Le tube 200 est déroulé à partir des moyens de dévidement A. Il est ensuite acheminé vers l'ensemble 10 d'insertion du film d'étanchéité 100. Cet ensemble 10 d'insertion du film d'étanchéité 100 comprend des moyens de guidage B, C, D, E, H, I, J, K, des moyens de positionnement du film d'étanchéité G et des moyens de soudage L. Le film d'étanchéité 100 est déroulé à partir d'une bobine 110 par des moyens de déroulement F.FIG. 2 shows a device 1 for forming bags, fitted with a set 10 for inserting a sealing film 100 between profiles 7 and 9. The means for forming sachets and introducing the sealing film 100 are designated by letters from A to N. The tube 200 is unwound from the unwinding means A. It is then routed towards the assembly 10 for inserting the sealing film 100. This assembly 10 inserting the sealing film 100 comprises guide means B, C, D, E, H, I, J, K, means for positioning the sealing film G and welding means L. The sealing film 100 is unwound from of a coil 110 by unwinding means F.

La figure 3 reprĂ©sente de maniĂšre plus dĂ©taillĂ©e le dispositif 10 d'introduction. Ce dispositif 10 comprend plusieurs roulettes Ă  gorges 12, 14, 16, 18 alignĂ©es. Il comprend aussi des roulettes Ă  gorges 20, 22, 24 pour guider la bande supĂ©rieure 6, munie du profilĂ© mĂąle 9, et destinĂ©es Ă  dĂ©gager un espace au droit de la bande 4 munie du profilĂ© femelle 7. Afin de ne pas surcharger la figure 3a, les profilĂ©s mĂąle 9 et femelle 7 ne sont pas reprĂ©sentĂ©s. Des roulettes Ă  chant plat 11, 13, 15, 17, 19, 21, 23, 25, 27, maintiennent la bande infĂ©rieure 4 et/ou la bande supĂ©rieure 6 en position contre les roulettes Ă  gorges 12, 14, 16, 18, 20, 22, 24 (la roulette Ă  champ plat 23 ne peut ĂȘtre reprĂ©sentĂ©e sur cette figure, elle se trouve derriĂšre la roulette Ă  gorge 22).Figure 3 shows in more detail the device 10 of introduction. This device 10 comprises several grooved rollers 12, 14, 16, 18 aligned. It also includes tumblers 20, 22, 24 to guide the upper strip 6, provided with the male profile 9, and intended for clear a space to the right of the strip 4 provided with the female profile 7. In order not to overload Figure 3a, the male 9 and female 7 sections are not not shown. Flat edge casters 11, 13, 15, 17, 19, 21, 23, 25, 27, hold the lower strip 4 and / or the upper strip 6 in position against grooved casters 12, 14, 16, 18, 20, 22, 24 (the caster flat field 23 cannot be represented in this figure, it is behind the grooved caster 22).

Le tube 200 muni des bandes 4 et 6 passe entre des premiers moyens de guidage B (figures 3a et 3b), puis est acheminé vers des moyens de séparation C des profilés (figures 3a et 3c). Au niveau des moyens de séparation C, les bandes 4 et 6 sont séparées par un dispositif séparateur 29 et guidées par des roulettes à chant plat 13 et 27. Le dispositif séparateur 29 comprend deux gorges. Ces gorges ont des ouvertures radialement opposées et les fonds respectifs de ces gorges convergent l'un vers l'autre dans la direction opposée au déplacement des profilés 7, 9. Dans chacune de ces gorges se positionnent un profilé femelle 7 ou mùle 9.The tube 200 fitted with bands 4 and 6 passes between the first guide means B (Figures 3a and 3b), then is routed to separation means C of the profiles (Figures 3a and 3c). At the level of separation means C, bands 4 and 6 are separated by a device separator 29 and guided by flat-edged casters 13 and 27. The separator device 29 comprises two grooves. These gorges have radially opposite openings and the respective bottoms of these grooves converge towards each other in the opposite direction to the movement of profiles 7, 9. In each of these grooves, a female profile is positioned 7 or male 9.

Tandis que la bande 4 de fermeture et le feuillet inférieur 204 sont guidés de maniÚre rectiligne par des deuxiÚmes moyens de guidage D, la bande de fermeture 6, le feuillet supérieur 206 sont acheminés vers des troisiÚmes moyens de guidage E. Les deuxiÚmes moyens de guidage D sont composés d'une roulette à gorges 14 et d'une roulette à chant plat 15, to.utes deux analogues aux roulette à gorges et roulette à chant plat des premiers moyens de guidage B. Les troisiÚmes moyens de guidage E sont composés d'une roulette à gorges 20 et d'une roulette à chant plat 21. Comme illustré par la figure 3a, l'ensemble de ces deux roulettes 20 et 21 est incliné, à la fois par rapport au plan longitudinal et par rapport au plan transversal de l'ensemble 10 (figure 3a, figure 3e et figure 4). L'angle d'inclinaison de ces roulettes par rapport à chacun de ces plans est par exemple de 45°.While the closure strip 4 and the lower sheet 204 are guided in a rectilinear manner by second guide means D, the closure strip 6, upper sheet 206 are routed to third guide means E. The second guide means D are composed of a grooved caster 14 and a flat-edged caster 15, to.utes two analogues to the grooved caster and the flat edge caster first guide means B. The third guide means E are composed of a grooved caster 20 and a flat edge caster 21. As illustrated in Figure 3a, all of these two rollers 20 and 21 is inclined, both relative to the longitudinal plane and relative to the plane transverse of the assembly 10 (Figure 3a, Figure 3e and Figure 4). The angle of inclination of these rollers relative to each of these planes is by 45 ° example.

Le film d'Ă©tanchĂ©itĂ© 100 arrive verticalement et transversalement par rapport au sens de dĂ©filement du tube 200. Le film d'Ă©tanchĂ©itĂ© 100 est guidĂ© et positionnĂ© sur la bande infĂ©rieure 4 par des moyens de positionnement G. Dans ce mode de rĂ©alisation du dispositif selon l'invention, les moyens de positionnement G sont constituĂ©s d'un rouleau de positionnement 30. Ce rouleau 30 est un cylindre de rĂ©volution dont l'axe de rĂ©volution est parallĂšle au plan de la bande de fermeture 4 et perpendiculaire au dĂ©placement de cette bande infĂ©rieure 4. La surface gĂ©nĂ©ratrice de rĂ©volution externe de ce cylindre effleure le profilĂ© 7 de la bande 4. Les moyens de positionnement G peuvent ĂȘtre aussi constituĂ©s d'une lame penchĂ©e et/ou incurvĂ©e prĂ©sentant une surface convexe au contact du film d'Ă©tanchĂ©itĂ© 100. D'autres gĂ©omĂ©tries sont encore envisageables pour ces moyens de positionnement G.The sealing film 100 arrives vertically and transversely by relative to the direction of travel of the tube 200. The sealing film 100 is guided and positioned on the lower strip 4 by means of positioning G. In this embodiment of the device according to the invention, the positioning means G consist of a roller positioning 30. This roller 30 is a cylinder of revolution whose axis of revolution is parallel to the plane of the closure strip 4 and perpendicular to the movement of this lower strip 4. The surface generator of external revolution of this cylinder grazes the profile 7 of the strip 4. The positioning means G can also be constituted a leaning and / or curved blade having a convex surface at contact of the sealing film 100. Other geometries are still possible for these positioning means G.

Le film 100 et la bande inférieure 4 sont acheminés vers des quatriÚmes moyens de guidage H. Ces quatriÚmes moyens de guidage H sont composés d'une roulette à gorges 16 et d'une roulette à chant plat 17. Ils sont analogues aux premiers moyens de guidage B et aux deuxiÚmes moyens de guidage D. Comme représenté sur la figure 3f, ces moyens de guidage H permettent d'appliquer le film d'étanchéité 100 sur la bande 4 de fermeture. A ce niveau de l'avancement du tube 200, la bande supérieure 6 et le feuillet supérieur 206 sont maintenus à leur extrémité libre en position verticale et arrivent au niveau des cinquiÚmes moyens de guidage I (figure 3a, figure 5. Les plans des bandes inférieure 4 et supérieure 6 font alors un angle α entre eux, qui est au maximum égal à 90° approximativement. On écarte ainsi la bande supérieure 6 pour dégager complÚtement l'espace nécessaire, au droit de cette derniÚre, au positionnement du film d'étanchéité 100 sur la bande inférieure 4.The film 100 and the lower strip 4 are conveyed to fourth guide means H. These fourth guide means H consist of a grooved caster 16 and a flat edge caster 17. They are similar to the first guide means B and to the second guide means D. As shown in FIG. 3f, these means of guide H allow the sealing film 100 to be applied to the strip 4 of closing. At this level of advancement of the tube 200, the upper strip 6 and the upper sheet 206 are held at their free end in position vertical and arrive at the level of the fifth guide means I (FIG. 3a, figure 5. The planes of the lower 4 and upper 6 bands then make a angle α between them, which is at most equal to approximately 90 °. We thus spreads the upper strip 6 to completely clear the space necessary, in line with the latter, for positioning the film sealing 100 on the lower strip 4.

AprÚs positionnement du film 100 sur la bande inférieure 4, la bande supérieure 6 et le feuillet 206 sont progressivement remis en position sur la bande inférieure 4 et le feuillet inférieur 204 grace à des sixiÚmes moyens de guidage J, composés d'une roulette à gorges 24 et d'une roulette à chant plat 25, et qui sont analogues aux troisiÚmes moyens de guidage E.After positioning the film 100 on the lower strip 4, the strip upper 6 and sheet 206 are gradually returned to position on the lower strip 4 and lower sheet 204 thanks to sixth means guide J, composed of a grooved caster 24 and a edge caster flat 25, and which are similar to the third guide means E.

Le profilĂ© mĂąle 9 est rĂ©engagĂ© dans le profilĂ© femelle 7 au niveau des moyens de guidage K (figure 6, sur cette figure les moyens de guidage J sont reprĂ©sentĂ©s en pointillĂ©s pour signifier qu'ils ne se trouvent pas dans le mĂȘme plan que les moyens de guidage K). Ces moyens K sont composĂ©s d'une roulette Ă  gorges 18 et d'une roulette Ă  chant plat 19, toutes deux analogues aux roulettes des premiers, troisiĂšmes et quatriĂšmes moyens de guidage B, D, H dĂ©jĂ  dĂ©crits. A partir de ces moyens de guidage K, le film d'Ă©tanchĂ©itĂ© 100 est insĂ©rĂ© entre les profilĂ©s mĂąle 7 et femelle 9 des bandes infĂ©rieure 4 et supĂ©rieure 6.The male profile 9 is re-engaged in the female profile 7 at the level guide means K (FIG. 6, in this figure the guide means J are shown in dotted lines to signify that they are not in the same plane as the guide means K). These means K are composed of a grooved caster 18 and a flat-edged caster 19, both analogous to the first, third and fourth casters guide means B, D, H already described. From these guide means K, the sealing film 100 is inserted between the male 7 and female 9 sections lower 4 and upper 6 bands.

L'ensemble des bandes infĂ©rieure 4, supĂ©rieure 6, et des feuillets infĂ©rieur 204 et supĂ©rieur 206 Ă  nouveau reposant l'un sur l'autre, est acheminĂ© vers des moyens de soudage L. Ces moyens de soudage L sont composĂ©s, par exemple, d'une barre de pression 40 et de moyens chauffants 45, la barre de pression 40 appliquant les moyens chauffants 45 sur le film d'Ă©tanchĂ©itĂ© 100 et pour souder le film 100 sur la bande infĂ©rieure 4 (figure 7a). Selon une variante, le film 100 est soudĂ© sur la bande supĂ©rieure 6, grĂące Ă  une barre de pression 40, et des moyens chauffants 45 permettant de presser et chauffer ensemble le film 100 et la bande supĂ©rieure 6 (figure 7b). D'autres moyens de soudage L seront dĂ©crits plus loin. Le tube 200 peut alors ĂȘtre acheminĂ© vers des moyens de dĂ©coupe M pour ĂȘtre transformĂ© en sachets 300, selon une maniĂšre conventionnelle. Les sachets 300 sont ensuite empilĂ©s au niveau d'un poste d'empilement N.All of the lower 4, upper 6, and sheet bands lower 204 and upper 206 again resting on each other, is routed to welding means L. These welding means L are composed, for example, of a pressure bar 40 and of means heaters 45, the pressure bar 40 applying the heating means 45 on the sealing film 100 and to weld the film 100 on the lower strip 4 (Figure 7a). According to a variant, the film 100 is welded to the strip upper 6, thanks to a pressure bar 40, and heating means 45 for pressing and heating together the film 100 and the strip upper 6 (Figure 7b). Other welding means L will be described more far. The tube 200 can then be routed to cutting means M to be transformed into bags 300, in a conventional manner. The bags 300 are then stacked at a stacking station N.

De nombreuses variantes du procĂ©dĂ© et du dispositif dĂ©crit ci-dessus, peuvent ĂȘtre envisagĂ©s tout en restant conformes Ă  l'invention. Ainsi, les moyens de positionnement G peuvent ĂȘtre constituĂ©s de rouleaux de positionnement 32, 34, 36, 38 (figures 8 et 9). Ces rouleaux 32, 34, 36, 38 ont une forme analogue Ă  celle des rouleaux 30 dĂ©jĂ  dĂ©crits. Tels que reprĂ©sentĂ©s sur les figures 8 et 9, les rouleaux 36, 38 sont orientĂ©s avec leur axe de rĂ©volution parallĂšle au dĂ©placement de la bande 4 infĂ©rieure. Un lĂ©ger espace est mĂ©nagĂ© entre ces rouleaux 36, 38 de maniĂšre Ă  guider le film d'Ă©tanchĂ©itĂ© 100 arrivant transversalement par rapport au dĂ©placement de la bande 4. En aval des rouleaux 36, 38, le film d'Ă©tanchĂ©itĂ© 100 subit une torsion de 90° de maniĂ©rĂ© Ă  s'Ă©tendre sur sa largeur entre les rouleaux 32, 34. Les rouleaux 32, 34 ont leur axe compris dans un plan parallĂšle Ă  celui de la bande 4 et perpendiculaire au sens de dĂ©placement de cette bande 4. Comme illustrĂ© par la figure 8, selon ce mode de rĂ©alisation du dispositif selon l'invention, l'espace Ă  dĂ©gager au droit de la bande 4 pour amener le film d'Ă©tanchĂ©itĂ© 100 au contact de celle-ci, est moindre que celui reprĂ©sentĂ© sur la figure 5. Ainsi, les moyens de guidage I peuvent ĂȘtre inclinĂ©s, par exemple d'un angle de 45°, au-dessus de la bande infĂ©rieure 4. Ceci permet de rĂ©duire la torsion imposĂ©e Ă  la bande supĂ©rieure 6, et de diminuer l'encombrement de l'ensemble 10.Many variants of the method and the device described above, can be envisaged while remaining in accordance with the invention. Thus, the positioning means G can consist of rollers positioning 32, 34, 36, 38 (Figures 8 and 9). These rollers 32, 34, 36, 38 have a shape similar to that of the rollers 30 already described. Such as shown in Figures 8 and 9, the rollers 36, 38 are oriented with their axis of revolution parallel to the movement of the lower strip 4. A slight space is provided between these rollers 36, 38 so as to guide the sealing film 100 arriving transversely to the displacement of the strip 4. Downstream of the rollers 36, 38, the sealing film 100 undergoes a 90 ° twist so as to extend across its width between the rollers 32, 34. The rollers 32, 34 have their axes included in a plane parallel to that of strip 4 and perpendicular to the direction of movement of this strip 4. As illustrated in FIG. 8, according to this embodiment of the device according to the invention, the space to be cleared to the right of the strip 4 for bring the sealing film 100 in contact with it, is less than that shown in Figure 5. Thus, the guide means I can be inclined, for example by an angle of 45 °, above the lower strip 4. This makes it possible to reduce the torsion imposed on the upper strip 6, and to reduce the overall dimensions of the assembly 10.

Comme reprĂ©sentĂ© sur la figure 10, dans une autre variante du dispositif selon l'invention, les moyens de positionnement G comprennent au moins un rouleau 30,. Sur la figure 10a est reprĂ©sentĂ© un film d'Ă©tanchĂ©itĂ© 100 repliĂ© en U autour du rouleau 30. Les plans des parties du film 100 en aval et en amont du rouleau 30 sont parallĂšles Ă  celui de la bande infĂ©rieure 4. La direction d'arrivĂ©e du film 100 sur le rouleau 30 et celle de dĂ©part font un angle ÎČ, qui peut ĂȘtre plus ou moins ouvert. Cette configuration peut permettre de rĂ©duire encore l'angle a, entre des bandes infĂ©rieure 4 et- supĂ©rieure 6. Il a Ă©tĂ© dĂ©crit ci-dessus un mode de mise en oeuvre du procĂ©dĂ© selon l'invention pour introduire un film d'Ă©tanchĂ©itĂ© 100 entre deux bandes de fermeture 4, 6 d'un dispositif de fermeture simple 3 liĂ©es Ă  des feuillets 204, 206 aptes Ă  former les parois d'un sachet 300.As shown in Figure 10, in another variant of the device according to the invention, the positioning means G comprise at least one roller 30 ,. In Figure 10a is shown a film seal 100 folded in a U around the roller 30. The plans of the parts of the film 100 downstream and upstream of the roll 30 are parallel to that of the lower strip 4. The direction of arrival of the film 100 on the roll 30 and that of departure make an angle ÎČ, which can be more or less open. This configuration can further reduce angle a, between bands lower 4 and- upper 6. It has been described above a mode of implementation work of the method according to the invention for introducing a sealing film 100 between two closing strips 4, 6 of a simple closing device 3 linked to sheets 204, 206 capable of forming the walls of a bag 300.

Le procĂ©dĂ© pour former une bande de fermeture avec joint, dĂ©crit ci-dessus peut ĂȘtre utilisĂ© pour Ă©quiper aussi bien des tubes 200 munis de dispositifs de fermeture simples 3 que des tubes 200 munis de dispositifs de fermeture double 5.The method for forming a closure strip with seal, described above can be used to equip 200 tubes with simple closing devices 3 as tubes 200 fitted with double closure 5.

Un dispositif double 5 est reprĂ©sentĂ© sur la figure 11. Il comprend une bande infĂ©rieure 4 de fermeture, et deux bandes supĂ©rieures de fermeture 6. La bande infĂ©rieure 4 est munie de deux profilĂ©s femelles 7. Les deux profilĂ©s femelles 7 sont espacĂ©s l'un de l'autre sur la largeur de la bande 4. Les bandes supĂ©rieures 6 sont munies chacune d'un profilĂ© mĂąle 9. Les deux bandes supĂ©rieures 6 sont sĂ©parĂ©es l'une de l'autre par un espace 8 s'Ă©tendant longitudinalement par rapport aux profilĂ©s 9. Les parties latĂ©rales des bandes 4 et 6, situĂ©es de l'autre cĂŽtĂ© des profilĂ©s par rapport Ă  l'espace 8, sont liĂ©es respectivement Ă  des feuillets infĂ©rieurs et supĂ©rieurs 204 et 206 aptes Ă  former les parois d'un sachet 300. Ce dispositif de fermeture double 5 est symĂ©trique par rapport Ă  l'espace 8. Les feuillets 204 et 206 peuvent ne former qu'un feuillet repliĂ© sur lui mĂȘme, parallĂšlement Ă  sa direction longitudinale, pour former un profil en U en coupe transversale, ou ils peuvent ĂȘtre soudĂ©s l'un Ă  l'autre. Dans ces deux cas, on forme deux tubes symĂ©triques par rapport Ă  l'espace 8.A double device 5 is shown in Figure 11. It includes a lower closure strip 4, and two upper strips of closure 6. The lower strip 4 is provided with two female sections 7. The two female sections 7 are spaced from one another over the width of the strip 4. The upper strips 6 are each provided with a male profile. 9. The two upper bands 6 are separated from each other by a space 8 extending longitudinally with respect to the profiles 9. The lateral parts of bands 4 and 6, located on the other side of the profiles by relative to space 8, are respectively linked to lower sheets and upper 204 and 206 able to form the walls of a bag 300. This double closing device 5 is symmetrical with respect to space 8. The sheets 204 and 206 may form only one sheet folded back on itself, parallel to its longitudinal direction, to form a U-shaped profile cross section, or they can be welded to each other. In these two case, two symmetrical tubes are formed with respect to space 8.

Le procédé selon l'invention peut éventuellement aussi permettre d'introduire un film d'étanchéité 100 entre deux bandes 4, 6 et de souder le film d'étanchéité 100 à des bandes de fermeture, qui ne seront soudées à un sachet 300, ou un feuillet apte à former un tel sachet 300, qu'ultérieurement.The process according to the invention can optionally also allow introduce a sealing film 100 between two strips 4, 6 and weld the sealing film 100 to closure strips, which will only be welded to a bag 300, or a sheet capable of forming such a bag 300, only later.

La figure 12 illustre un exemple de bandes 4, 6 qui ne sont pas encore fixĂ©es Ă  des feuillets 204, 206 aptes Ă  former un sachet 300. Ces bandes 4, 6 constituent un dispositif de fermeture double 5 qui diffĂšre de celui reprĂ©sentĂ© sur la figure 11, par le fait que les parties latĂ©rales des bandes 4 et 6, situĂ©es de l'autre cĂŽtĂ© des profilĂ©s par rapport Ă  l'espace 8, se rejoignent pour former un profil en U selon une coupe transversale. Chacun des deux ensembles de bandes 4, 6 situĂ© de part et d'autre de l'espace 8, peut ĂȘtre soudĂ© ultĂ©rieurement sur des parois de sachets 300 de maniĂšre usuelle pour l'homme du mĂ©tier.Figure 12 illustrates an example of bands 4, 6 which are not still attached to sheets 204, 206 capable of forming a bag 300. These bands 4, 6 constitute a double closure device 5 which differs from that shown in FIG. 11, by the fact that the lateral parts of the bands 4 and 6, located on the other side of the profiles with respect to the space 8, meet to form a U-shaped profile in a cross section. Each of the two sets of bands 4, 6 located on either side of the space 8, can be subsequently welded to walls of bags 300 of usual for the skilled person.

La figure 13 illustre schématiquement comment souder un film d'étanchéité 100 simple ou double sur un dispositif de fermeture double. Les figures 13b et 13d représentent des coupes transversales réalisées au niveau des moyens de soudage L.Figure 13 schematically illustrates how to weld a film 100 or single seal on a double closing device. Figures 13b and 13d show cross sections made at level of the welding means L.

Des films d'Ă©tanchĂ©itĂ© 100 simple et double sont reprĂ©sentĂ©s en coupe transversale, respectivement sur les figures 13a et 13c. Le film 100 double de la figure 11c est formĂ© par le repliement sur lui-mĂȘme, dans le sens longitudinal, de ces parties latĂ©rales, tout en mĂ©nageant un espace entre les bords libres longitudinaux de la bande, dans la zone mĂ©diane de cette derniĂšre.Single and double sealing films 100 are shown in cross section, respectively in Figures 13a and 13c. The film 100 double of Figure 11c is formed by the folding in on itself, in the longitudinal direction of these lateral parts, while leaving space between the free longitudinal edges of the strip, in the middle zone of the latter.

Une fois introduit entre les profilés 7, 9 des bandes 4, 6, le film d'étanchéité 100 est soudé par sa zone médiane longitudinale uniquement sur la bande inférieure 4. Lorsqu'il est double, le film d'étanchéité 100 est soudé par sa zone médiane longitudinale sur la bande inférieure 4 et par deux parties latérales sur la bande supérieure 6.Once introduced between the profiles 7, 9 of the strips 4, 6, the film sealing 100 is welded by its longitudinal central zone only on the lower strip 4. When it is double, the sealing film 100 is welded by its longitudinal central zone to the lower strip 4 and by two side parts on the upper strip 6.

L'opération de soudage est réalisée par une barre de soudage 42, qui vient presser, au niveau de l'espace 8, le film d'étanchéité 100 sur la face supérieure de la bande inférieure 4 contre une enclume 44. La barre 42 est mobile dans un mouvement de va et vient perpendiculaire au plan de déplacement dans lequel se déplace la bande inférieure 4. La barre 42 comporte une face plane parallÚle au plan de la bande inférieure 4. Cette face plane est perpendiculaire à la direction d'application de la pression nécessaire au soudage et vient plaquer le film 100 et la bande inférieure 4 contre l'enclume 44.The welding operation is carried out by a welding bar 42, which presses, at the space 8, the sealing film 100 on the upper face of the lower strip 4 against an anvil 44. The bar 42 is movable in a back and forth movement perpendicular to the plane of movement in which the lower strip moves 4. The bar 42 has a flat face parallel to the plane of the lower strip 4. This flat face is perpendicular to the direction of pressure application necessary for welding and presses the film 100 and the lower strip 4 against anvil 44.

Pour souder un film d'étanchéité 100 double, la barre de soudage 42 est munie de deux épaulements 41, 43. Les épaulements 41, 43 s'étendent perpendiculairement, de part et d'autre de l'extrémité de la barre 42, comportant la face plane parallÚle au plan de la bande inférieure 4. Ces épaulements 41, 43 longent la barre 42 sur toute la longueur de celle-ci dans la direction parallÚle au déplacement de la bande inférieure 4. D'autres barres de soudage 46 viennent flanquer la barre 42. Elles ont une face plane perpendiculaire à la direction d'application de la pression de soudage par l'intermédiaire de la barre 42. Ces autres barres de soudage 46 permettent de souder les bords libres longitudinaux de la bande formant le film 100, sur la face inférieure de la bande supérieure 6, en les pressant ensemble sur les épaulements 41, 43.To weld a double sealing film 100, the sealing bar 42 is provided with two shoulders 41, 43. The shoulders 41, 43 extend perpendicularly, on either side of the end of the bar 42, comprising the flat face parallel to the plane of the lower strip 4. These shoulders 41, 43 run along the bar 42 over the entire length thereof in the direction parallel to the movement of the lower strip 4. Other welding bars 46 flank the bar 42. They have a flat face perpendicular to the direction of application of the pressure welding via bar 42. These other welding bars 46 allow the longitudinal free edges of the strip to be welded the film 100, on the underside of the upper strip 6, by pressing them together on the shoulders 41, 43.

Un film d'étanchéité 100 simple présente les avantages suivants : il fournit un joint d'étanchéité sur toute la longueur des profilés 7, 9 ; s'il est en matériau trÚs fusible (par exemple EVA), il encapsule les extrémités soudées des profilés 7, 9 pour les rendre elles aussi étanches. A simple 100 sealing film has the following advantages: provides a seal over the entire length of the sections 7, 9; if he is in very fusible material (for example EVA), it encapsulates the ends welded profiles 7, 9 to make them also waterproof.

Un film 100 double permet en plus de former un témoin d'ouverture. S'il est suffisamment long il peut aussi, lorsque l'on déverse du produit contenu dans un sachet 300, se retourner pour protéger les profilés 7, 9 et éventuellement aussi former un bec verseur ou un entonnoir.A double film 100 also makes it possible to form an opening indicator. If it is long enough it can also, when pouring product contained in a bag 300, turn over to protect sections 7, 9 and possibly also form a pouring spout or a funnel.

Une autre maniÚre de réaliser un témoin d'ouverture est de souder chacun des bords libres longitudinaux d'un film d'étanchéité 100, sur une bande 4, 6 différente. La figure 14 illustre des moyens de soudage L compatibles avec ce mode de mise en oeuvre de l'invention. Le dispositif 1 de formation de fermetures étanches selon l'invention comprend alors une paire de moyens de soudage analogues à ceux décrits ci-dessus et illustré par la figure 7.Another way to make an opening indicator is to weld each of the longitudinal free edges of a sealing film 100, on a band 4, 6 different. FIG. 14 illustrates welding means L compatible with this embodiment of the invention. Device 1 for forming watertight closures according to the invention then comprises a pair of welding means similar to those described above and illustrated by figure 7.

Les barres de soudage 42 et 46 dĂ©crites ci-dessus pourraient ĂȘtre avantageusement remplacĂ©es par des roulettes, lorsqu'un soudage continu du film d'Ă©tanchĂ©itĂ© 100 sur un dispositif de fermeture 3, 5 est souhaitĂ©.The sealing bars 42 and 46 described above could be advantageously replaced by rollers, when continuous welding sealing film 100 on a closure device 3, 5 is desired.

Claims (20)

ProcĂ©dĂ© pour former une fermeture de sachet avec un joint, comprenant les Ă©tapes consistant Ă : entraĂ­ner un ensemble comprenant deux bandes (4, 6) de fermeture munies de profilĂ©s (7, 9) complĂ©mentaires engagĂ©s l'un dans l'autre, dans un dĂ©placement parallĂšle au sens longitudinal des bandes (4, 6) ; acheminer indĂ©pendamment des bandes (4, 6) de fermeture, un film (100) d'Ă©tanchĂ©itĂ© jusqu'Ă  des moyens de positionnement (G) ; et caractĂ©risĂ© en ce qu'il comprend en outre les Ă©tapes consistant Ă : dĂ©sengager les profilĂ©s (7, 9) l'un de l'autre ; Ă©carter progressivement les deux bandes de fermeture (4, 6) ; introduire et positionner Ă  l'aide des moyens de positionnement (G), le film (100) entre les bandes (4,6) de fermeture de maniĂšre Ă  ce que son dĂ©placement en aval des moyens de positionnement (G) soit parallĂšle Ă  celui de l'une (4) des bandes (4, 6) de fermeture ; resserrer les bandes (4, 6) l'une sur l'autre, jusqu'Ă  ce que les profilĂ©s (7, 9) s'engagent l'un dans l'autre avec le film (100) entre eux. Method for forming a bag closure with a seal, comprising the steps of: drive an assembly comprising two closing bands (4, 6) provided with complementary profiles (7, 9) engaged one inside the other, in a movement parallel to the longitudinal direction of the bands (4, 6); independently convey closure strips (4, 6), a sealing film (100) to positioning means (G); and characterized in that it further comprises the steps consisting in: disengage the profiles (7, 9) from each other; gradually move aside the two closure strips (4, 6); introduce and position using the positioning means (G), the film (100) between the closing strips (4,6) so that its movement downstream of the positioning means (G) is parallel to that one (4) of the closing strips (4, 6); tighten the strips (4, 6) one on the other, until the profiles (7, 9) engage one with the other with the film (100) between them. ProcĂ©dĂ© selon la revendication 1, caractĂ©risĂ© en ce qu'il est utilisĂ© pour introduire un film d'Ă©tanchĂ©itĂ© (100) entre deux bandes de fermeture (4, 6) munissant chacune un feuillet (204, 206) apte Ă  former une paroi de sachet (300).Method according to claim 1, characterized in that it is used for introducing a sealing film (100) between two closure strips (4, 6) each providing a sheet (204, 206) capable of forming a wall of bag (300). ProcĂ©dĂ© selon l'une des revendications prĂ©cĂ©dentes, caractĂ©risĂ© en ce qu'il est utilisĂ© pour introduire un film (100) d'Ă©tanchĂ©itĂ© entre les profilĂ©s (7, 9) d'un dispositif de fermeture double (5).Method according to one of the preceding claims, characterized in that it is used to introduce a sealing film (100) between the profiles (7, 9) of a double closing device (5). ProcĂ©dĂ© selon l'une des revendications prĂ©cĂ©dentes, caractĂ©risĂ© par le fait que l'on Ă©carte au moins une bande (6) de fermeture pour dĂ©gager complĂštement l'espace au droit de la (4) ou des autres bandes de fermeture.Method according to one of the preceding claims, characterized by the fact that at least one closure strip (6) is removed for completely clear the space to the right of (4) or the other strips of closing. ProcĂ©dĂ© selon l'une des revendications prĂ©cĂ©dentes, caractĂ©risĂ© en ce que l'angle maximum (α) entre les bandes (4, 6) de fermeture Ă©cartĂ©es l'une de l'autre est approximativement de 90°. Method according to one of the preceding claims, characterized in that the maximum angle (α) between the closing strips (4, 6) spaced from each other is approximately 90 °. ProcĂ©dĂ© selon l'une des revendications prĂ©cĂ©dentes, caractĂ©risĂ© en ce que l'on introduit un film (100) d'Ă©tanchĂ©itĂ© sous forme d'un feuillet simple entre les profilĂ©s (7, 9).Method according to one of the preceding claims, characterized in that a sealing film (100) is introduced in the form of a sheet simple between the profiles (7, 9). ProcĂ©dĂ© selon l'une des revendications prĂ©cĂ©dentes, caractĂ©risĂ© en ce que l'on introduit entre les profilĂ©s (7, 9), un film (100) d'Ă©tanchĂ©itĂ© avec ses parties latĂ©rales repliĂ©es longitudinalement sur lui-mĂȘme, pour former un feuillet double.Method according to one of the preceding claims, characterized in that a sealing film (100) is introduced between the profiles (7, 9) with its side parts folded longitudinally on itself, to form a double sheet. ProcĂ©dĂ© selon l'une des revendications prĂ©cĂ©dentes, caractĂ©risĂ© en ce qu'il comprend en outre une Ă©tape de soudage d'un bord du film d'Ă©tanchĂ©itĂ© (100) sur au moins une bande (4) de fermeture, aprĂšs que ce film d'Ă©tanchĂ©itĂ© (100) ait Ă©tĂ© introduit entre les profilĂ©s (7, 9).Method according to one of the preceding claims, characterized in that it further comprises a step of welding an edge of the film sealing (100) on at least one closure strip (4), after this sealing film (100) has been introduced between the profiles (7, 9). ProcĂ©dĂ© selon la revendication 8, caractĂ©risĂ© en ce que cette Ă©tape de soudage rĂ©alise le soudage de chaque bord longitudinal d'un film d'Ă©tanchĂ©itĂ© (100) repliĂ© sur lui-mĂȘme longitudinalement et introduit entre les profilĂ©s (7, 9), sur chacune des bandes (4, 6) de fermeture.Method according to claim 8, characterized in that this welding step welds each longitudinal edge of a film seal (100) folded in on itself longitudinally and inserted between the profiles (7, 9), on each of the closure strips (4, 6). ProcĂ©dĂ© selon l'une des revendications 1 Ă  8, caractĂ©risĂ© en ce qu'il comprend, aprĂšs l'introduction du film d'Ă©tanchĂ©itĂ© (100) entre les profilĂ©s (7, 9), une Ă©tape de soudage du film d'Ă©tanchĂ©itĂ© (100), par sa zone mĂ©diane longitudinale, uniquement sur la bande infĂ©rieure (4) d'un dispositif double (5) de fermeture.Method according to one of Claims 1 to 8, characterized in that that it comprises, after the introduction of the sealing film (100) between the profiles (7, 9), a step of welding the sealing film (100), by its zone longitudinal median, only on the lower band (4) of a device double (5) closure. ProcĂ©dĂ© selon l'une des revendications 1 Ă  8, caractĂ©risĂ© en ce qu'il comprend, aprĂšs l'introduction d'un film d'Ă©tanchĂ©itĂ© (100) avec ses parties latĂ©rales repliĂ©es longitudinalement sur lui-mĂȘme, entre les profilĂ©s, une Ă©tape de soudage du film d'Ă©tanchĂ©itĂ© (100) par sa zone mĂ©diane longitudinale sur la bande infĂ©rieure (4) et par ces parties latĂ©rales sur la bande supĂ©rieure (6), d'un dispositif double (5) de fermeture.Method according to one of Claims 1 to 8, characterized in that that it comprises, after the introduction of a sealing film (100) with its side parts folded longitudinally on itself, between the profiles, a step of welding the sealing film (100) through its central region longitudinal on the lower strip (4) and by these lateral parts on the upper strip (6), a double closure device (5). Dispositif pour la mise en oeuvre du procĂ©dĂ© selon l'une quelconque des revendications prĂ©cĂ©dentes, caractĂ©risĂ© en ce qu'il comprend : un systĂšme d'entraĂ­nement de bandes (4, 6) de fermeture, munies de profilĂ©s complĂ©mentaires (7,9) engagĂ©s l'un dans l'autre, dans un dĂ©placement parallĂšle au sens longitudinal des bandes (4, 6) ; des moyens de positionnement (G) d'un film d'Ă©tanchĂ©itĂ© (100) entre les bandes (4, 6) de fermeture ; un dispositif de sĂ©paration (40) des profilĂ©s, pour dĂ©sengager les profilĂ©s (7,9) l'un de l'autre ; des moyens de guidage (C, D, E) pour Ă©carter les bandes (4, 6) de fermeture, l'une sur l'autre, progressivement jusqu'aux moyens de positionnement (G) ; des moyens (K) pour resserrer les bandes (4, 6) l'une sur l'autre, jusqu'Ă  ce que les profilĂ©s (7, 9) s'engagent l'un dans l'autre avec le film (100) entre eux. Device for implementing the method according to any one of the preceding claims, characterized in that it comprises: a system for driving closing bands (4, 6), provided with complementary profiles (7, 9) engaged one inside the other, in a movement parallel to the longitudinal direction of the bands (4, 6); positioning means (G) of a sealing film (100) between the closure strips (4, 6); a profile separation device (40) for disengaging the profiles (7, 9) from one another; guide means (C, D, E) for moving the closing strips (4, 6) apart, one over the other, progressively up to the positioning means (G); means (K) for tightening the strips (4, 6) one on the other, until the profiles (7, 9) engage one with the other with the film (100) between them. Dispositif selon la revendication 12, caractĂ©risĂ© en ce qu'il permet d'introduire un film d'Ă©tanchĂ©itĂ© (100) entre deux bandes de fermeture (4, 6) munissant chacune un feuillet (204, 206) apte Ă  former une paroi de sachet (300).Device according to claim 12, characterized in that it allows to introduce a sealing film (100) between two closure strips (4, 6) each providing a sheet (204, 206) capable of forming a bag wall (300). Dispositif selon l'une des revendications 12 et 13, caractĂ©risĂ© en ce qu'il comprend des moyens (C Ă  K) pour introduire un film d'Ă©tanchĂ©itĂ© (100) entre les profilĂ©s (7, 9) d'un dispositif de fermeture double (5).Device according to one of claims 12 and 13, characterized in what it includes means (C to K) for introducing a sealing film (100) between the profiles (7, 9) of a double closing device (5). Dispositif selon l'une quelconque des revendications 12 Ă  14, caractĂ©risĂ© en ce qu'il comprend des moyens de guidage pour Ă©carter au moins une bande (6) de fermeture afin de dĂ©gager complĂštement l'espace au droit de la (4) ou des autres bandes de fermeture.Device according to any one of Claims 12 to 14, characterized in that it includes guide means for spreading at at least one closure strip (6) to completely clear the space in line with (4) or the other closure strips. Dispositif selon l'une quelconque des revendications 12 Ă  15, caractĂ©risĂ© en ce que l'angle maximum (a) entre les bandes (4, 6) de fermeture Ă©cartĂ©es l'une de l'autre est approximativement de 90°.Device according to any one of Claims 12 to 15, characterized in that the maximum angle (a) between the strips (4, 6) of closing apart from each other is approximately 90 °. Dispositif selon l'une quelconque des revendications 12 Ă  16, caractĂ©risĂ© en ce qu'il comprend des moyens (C Ă  K) pour introduire entre les profilĂ©s (7, 9), un film (100) d'Ă©tanchĂ©itĂ© sous forme d'un feuillet simple.Device according to any one of Claims 12 to 16, characterized in that it comprises means (C to K) for introducing between the profiles (7, 9), a sealing film (100) in the form of a single sheet. Dispositif selon l'une quelconque des revendications 12 Ă  17, caractĂ©risĂ© en ce qu'il comprend des moyens (C Ă  K) pour introduire entre les profilĂ©s (7, 9), un film (100) d'Ă©tanchĂ©itĂ© ayant ses parties latĂ©rales repliĂ©es longitudinalement sur lui-mĂȘme pour former un feuillet double. Device according to any one of Claims 12 to 17, characterized in that it comprises means (C to K) for introducing between the profiles (7, 9), a sealing film (100) having its lateral parts folded longitudinally on itself to form a double sheet. Dispositif de fermeture avec profilĂ©s complĂ©mentaires (7, 9), caractĂ©risĂ© en ce qu'il comprend un film d'Ă©tanchĂ©itĂ© (100) introduit entre les profilĂ©s (7, 9) grĂące au procĂ©dĂ© selon l'une des revendications 1 Ă  11.Closing device with complementary profiles (7, 9), characterized in that it comprises a sealing film (100) introduced between the profiles (7, 9) by the method according to one of claims 1 to 11. Sachet muni d'un dispositif de fermeture avec profilĂ©s complĂ©mentaires (7, 9), caractĂ©risĂ© en ce qu'il comprend un film d'Ă©tanchĂ©itĂ© (100) introduit entre les profilĂ©s (7, 9) grĂące au procĂ©dĂ© selon l'une quelconque des revendications 1 Ă  11.Bag with closure device with profiles complementary (7, 9), characterized in that it comprises a film sealing (100) introduced between the profiles (7, 9) by the process according to any one of claims 1 to 11.
EP99400443A 1998-02-25 1999-02-24 Method and device to make seals for bags Withdrawn EP0938968A1 (en)

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FR9802272A FR2775215B1 (en) 1998-02-25 1998-02-25 METHOD AND DEVICE FOR FORMING SEALED CLOSURES FOR BAGS
FR9802272 1998-02-25

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FR2775215B1 (en) 2000-05-12
US6110090A (en) 2000-08-29

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