WO1989011390A2 - Heat sealing device - Google Patents

Heat sealing device Download PDF

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Publication number
WO1989011390A2
WO1989011390A2 PCT/GB1989/000580 GB8900580W WO8911390A2 WO 1989011390 A2 WO1989011390 A2 WO 1989011390A2 GB 8900580 W GB8900580 W GB 8900580W WO 8911390 A2 WO8911390 A2 WO 8911390A2
Authority
WO
WIPO (PCT)
Prior art keywords
chains
elements
heat sealing
pair
heating
Prior art date
Application number
PCT/GB1989/000580
Other languages
French (fr)
Other versions
WO1989011390A3 (en
Inventor
Jack Evans Thompson
Original Assignee
Kenrick & Jefferson Limited
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 Kenrick & Jefferson Limited filed Critical Kenrick & Jefferson Limited
Publication of WO1989011390A2 publication Critical patent/WO1989011390A2/en
Publication of WO1989011390A3 publication Critical patent/WO1989011390A3/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8351—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws
    • B29C66/83531—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws jaws mounted on chains
    • B29C66/83533—Cooperating jaws mounted on cooperating chains and moving in a closed path
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • B29C66/91221—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91421—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the joining tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9161—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux
    • B29C66/91651—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating
    • B29C66/91655—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating by controlling or regulating the current intensity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/96—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process
    • B29C66/961—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving a feedback loop mechanism, e.g. comparison with a desired value
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • 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
    • B31B2155/00—Flexible containers made from webs
    • 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
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • 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
    • B31B70/14—Cutting, e.g. perforating, punching, slitting or trimming
    • B31B70/144—Cutting, e.g. perforating, punching, slitting or trimming using tools mounted on belts or chains
    • 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
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
    • B31B70/642—Uniting opposed surfaces or edges; Taping by applying heat or pressure using sealing jaws or sealing dies
    • 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
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
    • B31B70/649—Uniting opposed surfaces or edges; Taping by applying heat or pressure using tools mounted on a drum

Abstract

A heat sealing device for use in the high speed heating sealing of webs of thermally softenable material. Heating elements (12a) are provided on carriers (12) spanning two endless chains (10). Pressure elements (23) spanning another pair of endless chains co-act with the heating elements so that the latter apply heat and pressure to the webs for an extended period as the webs travel through the device. The temperature to which the heating elements are heated is controlled in accordance with the temperature of the heat sealed material leaving the device.

Description

HEAT SEALING DEVICE
This invention relates to a heat sealing device for heat sealing together two leaves of thermally softenable material forming part, for example, of a continuous stationery assembly.
It has already been proposed to use for this purpose a drum arrangement wherein a heater drum carries a plurality of heated bars and these coact with a counterpressure drum which is rotated in synchronism with the heater drum so that the heated bars and the pressure drum pinch the two leaves together at intervals as the leaves pass between them.
This arrangement has the disadvantage that heat and pressure are applied to the leaves only briefly and the duration of such application is inversely proportional to the speed at which the device is run.
It is an object of the present invention to provide a heat sealing device in which a sufficient heat and pressure application duration can be obtained at higher running speeds than heretofore possible.
A heat sealing device in accordance with the invention comprises a first pair of continuous chains extending in spaced parallel planes, a plurality of carrier elements extending between said first pair of chains, a plurality of heater bars mounted on said carrier elements respectively, a second pair of continuous chains extending in spaced parallel planes, a plurality of pressure elements extending between said second pair of chains, the two pairs of chains being arranged so that the heater bars and the pressure elements follow closed paths with the heater bars and pressure elements in contact with one another (in the absence of any intervening leaves) over one stretch of such paths.
In the accompanying drawings:
Figure 1 is a diagrammatic exploded perspective view of a device in accordance with the invention.
Figures 2 and 3 are end views of a carrier element and a pressure element used in the device, and
Figure 4 is a diagram of a heating current control used in the device.
Referring firstly to Figure 1, the device includes a first pair of continuous chains 10. Figure 1 shows upper and lower straight runs 10a, 10b of these chains, and the sprockets 11 which carry them. Mounted on the links of chain 10 at equally spaced intervals there are several carrier elements 12 on which elongated heater bars 12a are mounted. These heater bars each incorporate a resistive heater element extending along the heater bar and the two ends of this heater element are connected, by means not shown, to carbon or like brushes 16 near the ends of the associated carrier 12. Such brushes contact copper rails 15 on a fixed part of the structure of the device. These rails are on insulating supports 14 on a guide piece 13 engageable by rollers 17 mounted on the carrier elements 12.
It will be understood from the above that the carrier elements 12 are caused in use to follow a closed path which includes upper and lower horizontal runs and semi-circular portions joining these horizontal runs. The heater elements are heated by electricity passing through them via the rails 15 and the brushes 16 at opposite ends of the carrier elements while the carrier elements travel along the upper run and (briefly) via short conductor rail section 15a at the beginning of the lower run.
The device also includes a second pair of endless chains 20 . This is carried on sprockets 21. The arrangement is such that the upper runs 20a of the second pair of chains lie in the same horizontal plane as the lower runs of the chains 10. The spacing between the two chains 20 is less than that between the two chains 10.
Extending between the chains 20 are pressure elements 22 which have rollers 23 engaging a guide piece 24. Actual pressure from the heating bars 12a is taken on silicon rubber strips 25 see Figure 3 on the pressure elements.
Figures 2 and 3 show diagrammatically the manner in which the carrier elements and the pressure elements are mounted on the chains. The chains are 1/2" pitch chains and the pivots between the links are shown as small circles 10c , 20c in these Figures. Adjacent the leading edge of each carrier element, there is a pivotal connection 30 between the carrier element and one of these pivots. At the trailing edge a connection is made by way of a pin and slot connection 31, with four links of the chain intervening. This arrangement allows for the change in the straight line distance between these pivots as the carrier elements travel around the curved ends of their closed paths. The same arrangement is used for the pressure elements.
The device may be set up with various different spacings between carrier elements (and pressure elements). If, for example, the 1/2" pitch chains each consist of 88 links on 3.501" diameter sprockets with their axes 11" apart, spacings of 4", 51/2", 8" and 11" can easily be obtained. If, however, there are three different types of carrier element, one as shown in Figure 2, another with the heater bar displaced 1/3" towards the leading edge and a third with the heater bar displaced 1/3" towards the trailing edge, spacings of 32/3" and 71/3" can also be obtained. Different pressure elements are also required for these arrangements.
The device is used at one station in a continuous stationery collating machine and is synchronised with the machine in well-known manner to ensure that the parts of the webs 40, 41 (Figure 4) which are to be heat-sealed together arrive at the correct positions relative to the heating elements 12a. The webs 40, 41 may, for example contain between them continuous forms which have had parts cut away at earlier stations in the machine, and it is in the gaps formed by such cutting away that heat sealing between the webs 40, 41 is then formed.
The temperature to which the heating elements 12a are heated is controlled by a temperature sensor 42 mounted to detect the temperature of the heat sealed portions of the webs 40, 41 immediately following the device. The analog signal provided by the sensor 42 is sampled by a sample-and-hold circuit 43 synchronised with machine operation so that only the heat-sealed portions' temperature is sensed and the output of the sample-and-hold circuit 43 is applied to a heating current control circuit 44 which controls the average current flowing through the heating elements by the known expedient of varying the mark-to-space ratio of the voltage applied to the heating elements.
The temperature control arrangement ensures that the heat content of each heating element as it comes into contact with the webs is sufficient to raise the web temperature to that required for heat-sealing, whilst ensuring that the web has cooled enough by the time it parts from the heating element to avoid damage to the web.
With the arrangement described very much higher through puts of web are possible than with prior art construction using a heater drum arrangement.
Figure imgf000012_0001
Figure imgf000013_0001
Figure imgf000017_0001
Figure imgf000018_0001

Claims

1. A heat sealing devices for heat sealing together at spaced positions two leaves of thermally softenable material comprising a first pair of continuous chains extending in spaced parallel planes, a plurality of carrier elements extending between said first pair of chains, a plurality of heater bars mounted on said carrier elements respectively, a second pair of continuous chains extending in spaced parallel planes, a plurality of pressure elements extending between said second pair of chains, the two pairs of chains being arranged so that the heater bars and the pressure elements follow closed paths with the heater bars and pressure elements in contact with one another (in the absence of any intervening leaves) over one stretch of such paths.
2. A heat sealing device as claimed in Claim 1 in which each heater bar comprises an electrical heating element (12a) connected at opposite ends to brushes (16) co-acting with fixed conductors (15) to supply heating current to said element.
3. A heat sealing device as claimed in Claim 2 further comprising a temperature sensor (42) aranged to detect the temperature of the heat sealed portions of the leaves immediately after these have parted with the heating elements and a heating current control (44) connected to control the current in the heating elements.
PCT/GB1989/000580 1988-05-25 1989-05-25 Heat sealing device WO1989011390A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8812361A GB8812361D0 (en) 1988-05-25 1988-05-25 Heat sealing device
GB8812361.7 1988-05-25

Publications (2)

Publication Number Publication Date
WO1989011390A2 true WO1989011390A2 (en) 1989-11-30
WO1989011390A3 WO1989011390A3 (en) 1990-02-22

Family

ID=10637502

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1989/000580 WO1989011390A2 (en) 1988-05-25 1989-05-25 Heat sealing device

Country Status (4)

Country Link
AU (1) AU3732489A (en)
ES (1) ES2015667A6 (en)
GB (1) GB8812361D0 (en)
WO (1) WO1989011390A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0953429A2 (en) * 1998-04-27 1999-11-03 WindmÀ¶ller & Hölscher Process for controlling the the temperature of the heated air in an apparatus for hot air welding of synthetic sheets
ES2228193A1 (en) * 2000-12-12 2005-04-01 WINDMOLLER & HOLSCHER Process for tempering plastic films to be bonded and device for bonding plastic films with temperature controlled transport roll

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3122467A (en) * 1960-12-12 1964-02-25 Gilbert H Hannon Chain operated working head for material converting machinery
US3140218A (en) * 1957-07-11 1964-07-07 Hannon Engineering Company Repetitive operating forming head employing a pair of cooperating elements
US3300365A (en) * 1962-08-23 1967-01-24 Trans Atlas A G Machine for treating, such as heat sealing and cutting, a web of sheet material, in prticular for the manufacture of sacks
US3390042A (en) * 1964-03-20 1968-06-25 Meulen Leonard Van Der Device for the continuous manufacture of bags from a synthetic material
US3419453A (en) * 1963-12-27 1968-12-31 Continental Can Co Machine for forming containers from thermoplastic webs or tubing
DD98056A1 (en) * 1972-06-21 1973-06-12
US3748207A (en) * 1971-08-26 1973-07-24 Kimberly Clark Co Mechanism for heat sealing
US3826701A (en) * 1972-10-31 1974-07-30 Us Army Controllable heat sealing process for optimum seal strength
FR2257498A1 (en) * 1974-01-10 1975-08-08 Package Machinery Co
FR2272811A1 (en) * 1974-05-29 1975-12-26 Schlegel Engineering Gmbh Making continuous lap joints between sheets or films - by dispensing heat and melt adhesives interfacially
GB2016366A (en) * 1978-03-13 1979-09-26 Windmoeller & Hoelscher Method and apparatus for making bags from tubular or semi-tubular webs
WO1981001118A1 (en) * 1979-10-29 1981-04-30 A Kullberg A process and a device for hot working
GB2173147A (en) * 1983-10-11 1986-10-08 Mitsubishi Monsanto Chem Method of heating thermoplastic resin sheet or film

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3140218A (en) * 1957-07-11 1964-07-07 Hannon Engineering Company Repetitive operating forming head employing a pair of cooperating elements
US3122467A (en) * 1960-12-12 1964-02-25 Gilbert H Hannon Chain operated working head for material converting machinery
US3300365A (en) * 1962-08-23 1967-01-24 Trans Atlas A G Machine for treating, such as heat sealing and cutting, a web of sheet material, in prticular for the manufacture of sacks
US3419453A (en) * 1963-12-27 1968-12-31 Continental Can Co Machine for forming containers from thermoplastic webs or tubing
US3390042A (en) * 1964-03-20 1968-06-25 Meulen Leonard Van Der Device for the continuous manufacture of bags from a synthetic material
US3748207A (en) * 1971-08-26 1973-07-24 Kimberly Clark Co Mechanism for heat sealing
DD98056A1 (en) * 1972-06-21 1973-06-12
US3826701A (en) * 1972-10-31 1974-07-30 Us Army Controllable heat sealing process for optimum seal strength
FR2257498A1 (en) * 1974-01-10 1975-08-08 Package Machinery Co
FR2272811A1 (en) * 1974-05-29 1975-12-26 Schlegel Engineering Gmbh Making continuous lap joints between sheets or films - by dispensing heat and melt adhesives interfacially
GB2016366A (en) * 1978-03-13 1979-09-26 Windmoeller & Hoelscher Method and apparatus for making bags from tubular or semi-tubular webs
WO1981001118A1 (en) * 1979-10-29 1981-04-30 A Kullberg A process and a device for hot working
GB2173147A (en) * 1983-10-11 1986-10-08 Mitsubishi Monsanto Chem Method of heating thermoplastic resin sheet or film

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0953429A2 (en) * 1998-04-27 1999-11-03 WindmÀ¶ller & Hölscher Process for controlling the the temperature of the heated air in an apparatus for hot air welding of synthetic sheets
KR100612105B1 (en) * 1998-04-27 2006-08-11 빈드묄르 운트 휠셔 A method for the regulation of the temperature of the heated air in an apparatus for the hot-air pasting of plastic films
CZ300214B6 (en) * 1998-04-27 2009-03-18 Windmöller & Hölscher Method for the regulation of the temperature of the heated air when pasting plastic films and apparatus for making the same
ES2228193A1 (en) * 2000-12-12 2005-04-01 WINDMOLLER & HOLSCHER Process for tempering plastic films to be bonded and device for bonding plastic films with temperature controlled transport roll

Also Published As

Publication number Publication date
AU3732489A (en) 1989-12-12
WO1989011390A3 (en) 1990-02-22
ES2015667A6 (en) 1990-09-01
GB8812361D0 (en) 1988-06-29

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