EP1140653A1 - Resealable plastic packaging with at least one knob and method of manufacturing the same - Google Patents

Resealable plastic packaging with at least one knob and method of manufacturing the same

Info

Publication number
EP1140653A1
EP1140653A1 EP99963441A EP99963441A EP1140653A1 EP 1140653 A1 EP1140653 A1 EP 1140653A1 EP 99963441 A EP99963441 A EP 99963441A EP 99963441 A EP99963441 A EP 99963441A EP 1140653 A1 EP1140653 A1 EP 1140653A1
Authority
EP
European Patent Office
Prior art keywords
packaging
film
plastic packaging
knob
trough
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.)
Granted
Application number
EP99963441A
Other languages
German (de)
French (fr)
Other versions
EP1140653B1 (en
EP1140653B2 (en
Inventor
Dieter Berndt
Matthias Giebel
Christoph Waldau
Ulrich Reiners
Rudi Fux
Roland Karlsson
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.)
CFS Kempten GmbH
Original Assignee
CFS Kempten GmbH
Convenience Food Systems BV
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7891976&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1140653(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by CFS Kempten GmbH, Convenience Food Systems BV filed Critical CFS Kempten GmbH
Publication of EP1140653A1 publication Critical patent/EP1140653A1/en
Publication of EP1140653B1 publication Critical patent/EP1140653B1/en
Application granted granted Critical
Publication of EP1140653B2 publication Critical patent/EP1140653B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
    • B65D77/2068—Means for reclosing the cover after its first opening
    • B65D77/2072—Mechanical means
    • B65D77/2088—Mechanical means attached to the cover
    • 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
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
    • B65D77/2028—Means for opening the cover other than, or in addition to, a pull tab
    • B65D77/2032—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container
    • 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
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
    • B65D77/2068—Means for reclosing the cover after its first opening
    • B65D77/2072—Mechanical means
    • B65D77/2076—Mechanical means provided by the cover itself

Definitions

  • the present invention relates to a resealable plastic packaging which consists of a packaging tray and a cover film, the cover film being sealed to the packaging tray at least partially in a peelable manner.
  • Packaging goods especially food, are now increasingly being offered for sale in plastic packaging.
  • This plastic packaging has a packaging trough in which the packaged goods are located and a cover film. The cover film is sealed to the packaging tray. Since the packaged goods are often not used immediately after opening, it is advantageous if the packaging can be reclosed after opening.
  • a resealable plastic packaging consisting of a packaging trough and a lid film, the lid film in the sealing area being sealed at least partially peelable to the packaging trough and the lid film or the packaging trough at least one knob and the packaging trough or the lid film complementarily at least one Has recess through which the Knob is inserted so that the plastic packaging can be reclosed after opening.
  • a packaging tray in the sense of the invention is any packaging tray familiar to the person skilled in the art, which was produced from a thermoplastic and dimensionally stable single-layer or multilayer film, which is preferred for the packaging of foods.
  • the film must have a sealing layer on at least one of its two surfaces which is peelable.
  • a mixture of LDPE (Low Density Polyethylene) and a polybutylene is preferably used as the sealing layer.
  • the mixture preferably contains 15 to 30% by weight, particularly preferably 20 to 28% by weight, of polybutylene.
  • the polybutylene preferably has a melt index (MFI) in the range from 0.3 to 2.0 g / 10 min (190 ° C. and 216 kg according to ASTM 1238).
  • the packaging tray is particularly preferably produced from a multilayer film with a foamed carrier film, preferably a foamed polyolefin film, particularly preferably polypropylene film.
  • the packaging tray is very particularly preferably produced from a film, as disclosed in the patent application with the file number of the German Patent Office 19840 046.2. This patent application is hereby introduced as a reference and is therefore considered part of the disclosure.
  • thermoformed, preferably deep-drawn, packaging troughs are sealed with a deep-drawn lid film familiar to the person skilled in the art after filling with the packaging goods.
  • Multi-layer films with a gas barrier layer made of ethylene vinyl alcohol copolymer, preferably made of polyethylene terephthalate (PET) / adhesion promoter layer / polyethylene / are particularly suitable as cover films.
  • Polyethylene where the polyethylene terephthalate layer can be replaced by polypropylene.
  • the cover film of the packaging according to the invention can also have SiO x as a gas barrier layer.
  • the cover film is then preferably made of PET / SiO x / adhesion promoter / polyethylene.
  • the cover film is sealed to the packaging trough in the sealing area, the cover film being sealed to the packaging trough at least partially in a peelable manner.
  • the cover film is at a temperature of 130 ° C to 150 ° C, preferably 135 to 145 ° C, and a pressure of 3 to 8 • 10 5 N / m 2 , preferably from 4.0 to 5, 0 • 10 5 N / m 2 sealed to the packaging tray.
  • the packaging according to the invention is to have a non-peelable, ie tightly sealed, portion of the sealing area
  • the firm sealing is preferably carried out at a temperature which is at least 10 ° C. higher and preferably twice the pressure than the peelable sealing.
  • a fixed seal in the sense of the invention is a seal in which the peeling force of the cover film is at least? must be five times higher than in the area of peelable sealing.
  • the sealing area on the packaging trough is preferably located on a horizontal plane above the packaging material and preferably extends on this plane around the entire packaging material.
  • the cover film can be securely sealed to the packaging tray on preferably at least one side of this polygon, while the cover film is peelable to the packaging tray in the remaining sealing area.
  • 5-25% of the sealing area can preferably be provided with a tight seal.
  • the packaging trough or the cover film has at least one recess, which is preferably located on the horizontal plane above the goods to be packaged.
  • the recess can have any shape and size, but it must be compatible with the shape of the knob.
  • the recess is preferably approximately circular with a diameter of 3 to 12 mm, preferably of 4 to 9 mm.
  • the recess is preferably drilled or punched into the packaging trough or the cover film, punching being particularly preferred.
  • the cover film or the packaging trough has at least one knob, which is arranged complementarily to the recess in the packaging trough or the cover film and whose shape must be so compatible with the shape of the recess that they are inserted through the recess can and remains there.
  • the knob preferably has approximately the shape of a cylinder, the diameter of which is preferably from 3 to 12 mm and the length of which is preferably from 3 to 15 mm, particularly preferably 4 to 8 mm.
  • the diameter of the knob is very particularly preferred ⁇ the diameter of the approximately circular recess.
  • the knob (s) or the recess (s) is / are preferably arranged closer to the outer edge of the plastic packaging than the sealing area.
  • knob (s) or the recess (s) are attached to the plastic packaging in such a way that they lie outside the area of the fixed sealing, preferably diametrically opposite.
  • This arrangement has the advantage that the cover film can be stretched and then firmly but releasably connected to the knob closures.
  • the cover film has the cutout (s) and the packaging trough has the knob (s).
  • the plastic packaging according to the invention can preferably have additional means for reclosing the packaging.
  • Such means are preferably a zipper, e.g. disclosed in EP 0 621 197 A1, a sealing lip, a snap closure as disclosed in EP 0427 512 or a Velcro closure as disclosed in the parallel application with the internal file number CH 8006.
  • Food preferably solid, particularly preferably fresh or cooked meat or sausage products, are preferably packaged in the packaging according to the invention.
  • the plastic packaging according to the invention is advantageously produced by forming the packaging tray by deep-drawing a film. Then or at the same time, a recess is made in the packaging trough, preferably punched, or a knob is formed by thermoforming. In the following process step, the packaging tray is filled, if necessary, and then a cover film is sealed onto the packaging tray, a gas exchange, if necessary, to extend the shelf life of the
  • the knob (s) is produced by thermoforming the cover film or the recess (s) are punched out.
  • the knob is preferably manufactured with a stamp or with compressed air, with which the material to be deformed is pressed through the recess.
  • plastic packaging With the plastic packaging according to the invention, it is possible to seal a packaging that has been opened once, but can be closed again in a releasable manner. Closing or opening is easy for the user.
  • the plastic packaging is simple and inexpensive to manufacture.
  • Figure 1 shows a plastic packaging according to the invention with a fixed partial sealing area, in which the knobs in the cover film and the recesses are in the packaging trough.
  • FIG. 2 shows a plastic packaging according to FIG. 1 with knobs or recesses lying outside the sealing area, the knobs on the packaging trough and the recesses in the cover film.
  • Figure 1 shows a plastic packaging 1 according to the invention, which consists of a packaging tray 2 and a cover film 3.
  • the packaging has a sealing area 4, which is arranged horizontally and extends around the entire packaging trough 2.
  • the cover film 3 is sealed to the packaging trough 2, the cover film in the weakly dotted section of the sealing area 4 being peelably sealed to the packaging trough, while in the strongly dotted section of the sealing area 4 it is tightly sealed to the packaging trough.
  • the cover film is only pulled off the packaging trough on three sides and remains connected to it in the section of the fixed seal.
  • the cover film a semi-rigid polyethylene terephthalate / EVOH / polyethylene-polybutylene film, has two approximately cylindrical knobs which have a length of 4 mm and a diameter of 7 mm.
  • the knobs 5 have been stamped into the cover film by thermoforming with a stamp.
  • the packaging tray 2 has two approximately circular recesses 6, which are arranged opposite the knobs 5 and have a diameter of 7 mm.
  • knobs 5 or recesses 6 can also be arranged at other points in the plastic packaging and / or there can be further knobs / recesses in addition to the two shown.
  • the packaging is closed again by pressing the knobs 5 into the recesses 6 and remaining there until the cover film is pulled off again and the knobs are thus pulled out of the recesses.
  • the entire sealing area between the cover film and the packaging tray may be designed to be peelable.
  • the knob (s) or recesses not only serve as a closure element (s), but also for adjusting the cover film on the packaging tray when reclosing.
  • FIG. 2 shows the plastic packaging 1 according to FIG. 1, the knobs 5 in the packaging trough 4 and the recess 6 in the cover film 3, in each case outside the sealing area.

Abstract

The invention relates to a resealable plastic packaging container (1) consisting of a tray (2) and a foil lid (3) which in the sealing area is sealed to the tray such that it can be at least partly peeled back. The foil lid or tray comprises at least one knob and the tray or foil lid complementary thereto comprises hat least one opening (6) through which the knob (5) is passed when the plastic packaging container is resealed after opening.

Description

Wiederverschließbare Kunststoffverpackung mit mindestens einer NoppeResealable plastic packaging with at least one knob
Die vorliegende Erfindung betrifft eine wiederverschließbare Kunststoffverpackung, die aus einer Verpackungsmulde und einer Deckelfolie besteht, wobei die Deckelfolie mindestens teilweise peelbar an die Verpackungsmulde gesiegelt ist.The present invention relates to a resealable plastic packaging which consists of a packaging tray and a cover film, the cover film being sealed to the packaging tray at least partially in a peelable manner.
Verpackungsgüter, insbesondere Lebensmittel werden heutzutage immer öfter in Kunststoffverpackungen zum Verkauf angeboten. Diese Kunststoffverpackungen weisen eine Verpackungsmulde, in der sich das Verpackungsgut befindet und einen Deckelfolie auf. Die Deckelfolie ist an die Verpackungsmulde gesiegelt. Da das Verpackungsgut nach dem öffnen oftmals nicht sofort verbraucht wird, ist es von Vorteil, wenn die Verpackung nach dem Öffnen wiederverschließbar ist.Packaging goods, especially food, are now increasingly being offered for sale in plastic packaging. This plastic packaging has a packaging trough in which the packaged goods are located and a cover film. The cover film is sealed to the packaging tray. Since the packaged goods are often not used immediately after opening, it is advantageous if the packaging can be reclosed after opening.
Es hat deshalb in der Vergangenheit nicht an Versuchen gefehlt, wiederverschließbare Verpackungen zur Verfügung zu stellen. Beispielhaft seien hier nur die EP 0 564 695, DE 39 25 746, EP 0 386490, DE 3941 183, EP 0408 516, WO 97/05023, EP 0 716 986, EP 0 595368, EP 0 579 262, EP 0 506 295, EP 0427 513, EP 0427 512, EP 0 385 565, EP 0 381 329 oder EP0 379 927 genannt, in denen entweder Verfahren und Vorrichtungen zur Herstellung einer wiederverschließbaren Verpackung und/oder die wiederverschließbare Verpackung selbst gelehrt werden. Alle die, in den oben genannten Veröffentlichungen offenbarten, wiederverschließbaren Verpackungen haben entweder den Nachteil, daß sie aufwendig herzustellen und/oder nur schlecht wiederverschließbar sind.In the past, there has therefore been no shortage of attempts to provide reclosable packaging. Examples are only EP 0 564 695, DE 39 25 746, EP 0 386490, DE 3941 183, EP 0408 516, WO 97/05023, EP 0 716 986, EP 0 595368, EP 0 579 262, EP 0 506 295 , EP 0427 513, EP 0427 512, EP 0 385 565, EP 0 381 329 or EP0 379 927, in which either methods and devices for producing a reclosable packaging and / or the reclosable packaging itself are taught. All the reclosable packaging disclosed in the above-mentioned publications either have the disadvantage that they are expensive to manufacture and / or are difficult to reclose.
Es stellt sich deshalb die Aufgabe eine wiederverschließbare Kunststoffverpackung zur Verfügung zu stellen, die die Nachteile des Standes der Technik nicht aufweist.It is therefore the task of providing a resealable plastic packaging which does not have the disadvantages of the prior art.
Die Aufgabe wird erfindungsgemäß durch die Bereitstellung einer wiederverschließbaren Kunststoffverpackung aus einer Verpackungsmulde und einer Deckelfolie gelöst, wobei die Deckelfolie im Siegelbereich mindestens teilweise peelbar an die Verpackungsmulde gesiegelt ist und die Deckelfolie oder die Verpackungsmulde mindestens eine Noppe und die Verpackungsmulde oder die Deckelfolie komplementär dazu mindestens eine Aussparung aufweist, durch die die Noppe gesteckt wird, so daß die Kunststoffverpackung nach dem Öffnen wiederverschließbar ist.The object is achieved according to the invention by the provision of a resealable plastic packaging consisting of a packaging trough and a lid film, the lid film in the sealing area being sealed at least partially peelable to the packaging trough and the lid film or the packaging trough at least one knob and the packaging trough or the lid film complementarily at least one Has recess through which the Knob is inserted so that the plastic packaging can be reclosed after opening.
Eine Verpackungsmulde im Sinne der Erfindung ist jede dem Fachmann geläufige Verpackungsmulde, die aus einer, vorzugsweise für die Verpackung von Lebensmitteln üblichen, thermoplastischen und formstabilen Ein- oder Mehrschichtfolie hergestellt wurde.A packaging tray in the sense of the invention is any packaging tray familiar to the person skilled in the art, which was produced from a thermoplastic and dimensionally stable single-layer or multilayer film, which is preferred for the packaging of foods.
Die Folie muß an mindestens einer ihrer beiden Oberflächen eine Siegelschicht aufweisen, die peelfähig ist. Als Siegelschicht wird vorzugsweise eine Mischung aus LDPE (Low Density Polyethylen) und einem Polybutylen verwendet. Die Mischung enthält vorzugsweise 15 bis 30 Gew.%, besonders bevorzugt 20 bis 28 Gew.% Polybutylen. Vorzugsweise weist das Polybutylen einen Schmelzindex (MFI) im Bereich von 0,3 bis 2,0 g/10 min (190°C und 216 kg gemäß ASTM 1238) auf.The film must have a sealing layer on at least one of its two surfaces which is peelable. A mixture of LDPE (Low Density Polyethylene) and a polybutylene is preferably used as the sealing layer. The mixture preferably contains 15 to 30% by weight, particularly preferably 20 to 28% by weight, of polybutylene. The polybutylene preferably has a melt index (MFI) in the range from 0.3 to 2.0 g / 10 min (190 ° C. and 216 kg according to ASTM 1238).
Besonders bevorzugt wird die Verpackungsmulde aus einer mehrschichtigen Folie mit einer geschäumten Trägerfolie, vorzugsweise einer geschäumten Polyolefonfolie, besonders bevorzugt Polypropylenfolie, hergestellt.The packaging tray is particularly preferably produced from a multilayer film with a foamed carrier film, preferably a foamed polyolefin film, particularly preferably polypropylene film.
Ganz besonders bevorzugt wird die Verpackungsmulde aus einer Folie hergestellt, wie sie in der Patentanmeldung mit dem Aktenzeichen des Deutschen Patentamtes 19840 046.2 offenbart ist. Diese Patentanmeldung wird hiermit als Referenz eingeführt und gilt somit als Teil der Offenbarung.The packaging tray is very particularly preferably produced from a film, as disclosed in the patent application with the file number of the German Patent Office 19840 046.2. This patent application is hereby introduced as a reference and is therefore considered part of the disclosure.
Die thermogeformten, vorzugsweise tiefgezogenen Verpackungsmulden werden nach dem Befüllen mit dem Verpackungsgut mit einer dem Fachmann geläufigen, tiefziehbaren Deckelfolien verschlossen. Als Deckelfolien eignen sich insbesondere Mehrschichtfilme mit einer Gassperrschicht aus Ethylenvinylalkoholcopolymer, vorzugsweise aus Polyethylenterephtalat(PET)/Haftvermittlerschicht/Polyethylen/The thermoformed, preferably deep-drawn, packaging troughs are sealed with a deep-drawn lid film familiar to the person skilled in the art after filling with the packaging goods. Multi-layer films with a gas barrier layer made of ethylene vinyl alcohol copolymer, preferably made of polyethylene terephthalate (PET) / adhesion promoter layer / polyethylene / are particularly suitable as cover films.
Haftver-mittlerschicht/Ethylen-Vinylalkoholcopolymer/Haftvermittlerschicht/Adhesion promoter layer / ethylene-vinyl alcohol copolymer / adhesion promoter layer /
Polyethylen, wobei die Polyethylenterephtalatschicht durch Polypropylen ersetzt sein kann.Polyethylene, where the polyethylene terephthalate layer can be replaced by polypropylene.
Sofern die Deckelfolie der erfindungsgemäßen Verpackung die Aussparung aufweist, kann sie auch als Gassperrschicht SiOx aufweisen. Vorzugsweise ist dann die Deckelfolie aus PET/SiOx/Haftvermittler/Polyethylen aufgebaut. Die Deckelfolie wird erfindungsgemäß an die Verpackungsmulde im Siegelbereich gesiegelt, wobei die Deckelfolie mindestens teilweise peelbar an die Verpackungsmulde gesiegelt wird. Für die peelfähige Siegelung wird die Deckelfolie bei einer Temperatur von 130°C bis 150°C, vorzugsweise von 135 bis 145°C, und einem Druck von 3 bis 8 • 105 N/m2, vorzugsweise von 4,0 bis 5,0 • 105 N/m2 an die Verpackungsmulde gesiegelt. Sofern die erfindungsgemäßen Verpackungen einen nicht peelbare, d. h. fest gesiegelten Teilbereich des Siegelbereiches aufweisen sollen, so wird die feste Siegelung vorzugsweise bei einer mindestens 10°C höheren Temperatur und vorzugsweise dem zweifachen Druck durchgeführt als die peelbare Siegelung. Eine feste Siegelung im Sinne der Erfindung ist eine Siegelung, bei der die Ablösekraft der Deckelfolie um mindesten? das Fünffache höher sein muß als im Bereich der peelbaren Siegelung.If the cover film of the packaging according to the invention has the cutout, it can also have SiO x as a gas barrier layer. The cover film is then preferably made of PET / SiO x / adhesion promoter / polyethylene. According to the invention, the cover film is sealed to the packaging trough in the sealing area, the cover film being sealed to the packaging trough at least partially in a peelable manner. For the peelable sealing, the cover film is at a temperature of 130 ° C to 150 ° C, preferably 135 to 145 ° C, and a pressure of 3 to 8 • 10 5 N / m 2 , preferably from 4.0 to 5, 0 • 10 5 N / m 2 sealed to the packaging tray. If the packaging according to the invention is to have a non-peelable, ie tightly sealed, portion of the sealing area, the firm sealing is preferably carried out at a temperature which is at least 10 ° C. higher and preferably twice the pressure than the peelable sealing. A fixed seal in the sense of the invention is a seal in which the peeling force of the cover film is at least? must be five times higher than in the area of peelable sealing.
Der Siegelbereich an der Verpackungsmulde befindet sich vorzugsweise auf einer waagerechten Ebene oberhalb des Verpackungsgutes und erstreckt sich vorzugsweise auf dieser Ebene um das gesamte Verpackungsgut herum. Bei einer vieleckigen Kunststoffverpackung kann die Deckelfolie an vorzugsweise mindestens einer Seite dieses Vielecks mit der Verpackungsmulde fest gesiegelt, während die Deckelfolie in dem verbleibenden Siegelbereich peelfähig mit der Verpackungsmulde gesiegelt ist. Bei einer runden Verpackung kann vorzugsweise 5-25% des Siegelbereiches mit einer festen Siegelung versehen sein.The sealing area on the packaging trough is preferably located on a horizontal plane above the packaging material and preferably extends on this plane around the entire packaging material. In the case of polygonal plastic packaging, the cover film can be securely sealed to the packaging tray on preferably at least one side of this polygon, while the cover film is peelable to the packaging tray in the remaining sealing area. In the case of round packaging, 5-25% of the sealing area can preferably be provided with a tight seal.
Erfindungsgemäß weist die Verpackungsmulde oder die Deckelfolie mindestens eine Aussparung auf, die sich vorzugsweise auf der waagerechten Ebene oberhalb des Verpackungsgutes befindet. Die Aussparung kann eine beliebige Form und Größe haben, die jedoch mit der Form der Noppe kompatibel sein muß. Vorzugsweise ist die Aussparung näherungsweise kreisförmig mit einem Durchmesser von 3 bis 12 mm, vorzugsweise von 4 bis 9 mm. Die Aussparung wird vorzugsweise in die Verpackungsmulde oder die Deckelfolie gebohrt oder gestanzt, wobei Stanzen besonders bevorzugt ist.According to the invention, the packaging trough or the cover film has at least one recess, which is preferably located on the horizontal plane above the goods to be packaged. The recess can have any shape and size, but it must be compatible with the shape of the knob. The recess is preferably approximately circular with a diameter of 3 to 12 mm, preferably of 4 to 9 mm. The recess is preferably drilled or punched into the packaging trough or the cover film, punching being particularly preferred.
Ebenfalls erfindungsgemäß weist die Deckelfolie oder die Verpackungsmulde mindestens eine Noppe auf, die zur Aussparung in der Verpackungsmulde oder die Deckelfolie komplementär angeordnet ist und deren Form mit der Form der Aussparung so kompatibel sein muß, daß sie durch die Aussparung gesteckt werden kann und dort verbleibt. Vorzugsweise hat die Noppe näherungsweise die Form eines Zylinders, dessen Durchmesser vorzugsweise von 3 bis 12 mm und dessen Länge vorzugsweise von 3 bis 15 mm, besonders bevorzugt 4 bis 8 mm, beträgt. Ganz besonders bevorzugt ist der Durchmesser der Noppe < dem Durchmesser der näherungsweise kreisförmigen Aussparung.Also according to the invention, the cover film or the packaging trough has at least one knob, which is arranged complementarily to the recess in the packaging trough or the cover film and whose shape must be so compatible with the shape of the recess that they are inserted through the recess can and remains there. The knob preferably has approximately the shape of a cylinder, the diameter of which is preferably from 3 to 12 mm and the length of which is preferably from 3 to 15 mm, particularly preferably 4 to 8 mm. The diameter of the knob is very particularly preferred <the diameter of the approximately circular recess.
Vorzugsweise wird/werden die Noppe(n) bzw. die Aussparung(en) näher am Außenrand der Kunststoffverpackung angeordnet als der Siegelbereich.The knob (s) or the recess (s) is / are preferably arranged closer to the outer edge of the plastic packaging than the sealing area.
Sofern ein fester Siegelbereich vorhanden ist, dann werden die Noppe(n) bzw. die Aussparung(en) so an der Kunststoffverpackung angebracht, daß sie außerhalb des Bereichs der festen Siegelung, bevorzugt diametral gegenüber liegen. Diese Anordnung hat den Vorteil, daß die Deckelfolie gespannt und dann mit dem/den Noppenverschlüssen fest jedoch wieder lösbar verbunden werden kann.If there is a fixed sealing area, then the knob (s) or the recess (s) are attached to the plastic packaging in such a way that they lie outside the area of the fixed sealing, preferably diametrically opposite. This arrangement has the advantage that the cover film can be stretched and then firmly but releasably connected to the knob closures.
In einer bevorzugten Verpackungsform weist die Deckelfolie die Aussparung(en) und die Verpackungsmulde die Noppe(n) auf.In a preferred packaging form, the cover film has the cutout (s) and the packaging trough has the knob (s).
Vorzugsweise kann die erfindungsgemäße Kunststoffverpackung zusätzliche Mittel zur Wiederverschließung der Verpackung aufweisen. Solche Mittel sind vorzugsweise ein Reißverschluß, wie z.B. in der EP 0 621 197 A1 offenbart, eine Dichtlippe, ein Schnappverschluß, wie in der EP 0427 512 offenbart oder ein Klettverschluß wie in der Parallelanmeldung mit dem internen Aktenzeichen CH 8006 offenbart ist. Diese Veröffentlichungen bzw. die Parallelanmeldung werden hiermit als Referenz eingeführt und sind somit Teil der Offenbarung.The plastic packaging according to the invention can preferably have additional means for reclosing the packaging. Such means are preferably a zipper, e.g. disclosed in EP 0 621 197 A1, a sealing lip, a snap closure as disclosed in EP 0427 512 or a Velcro closure as disclosed in the parallel application with the internal file number CH 8006. These publications or the parallel application are hereby introduced as a reference and are therefore part of the disclosure.
Vorzugsweise werden in der erfindungsgemäßen Verpackung Lebensmittel, vorzugsweise feste, besonders bevorzugt frische oder gekochte Fleisch- oder Wurstwaren, verpackt.Food, preferably solid, particularly preferably fresh or cooked meat or sausage products, are preferably packaged in the packaging according to the invention.
Die erfindungsgemäße Kunststoffverpackung wird vorteilhafterweise hergestellt, indem die Verpackungsmulde durch Tiefziehen einer Folie gebildet wird. Danach oder gleichzeitig wird eine Aussparung in der Verpackungsmulde angebracht, vorzugsweise gestanzt, oder durch Thermoverformung eine Noppe gebildet. In dem folgenden Verfahrensschritt wird die Verpackungsmulde gegebenenfalls befüllt und dann eine Deckelfolie auf die Verpackungsmulde gesiegelt, wobei vor dem Siegeln gegebenenfalls ein Gasaustausch zur Verlängerung der Haltbarkeit desThe plastic packaging according to the invention is advantageously produced by forming the packaging tray by deep-drawing a film. Then or at the same time, a recess is made in the packaging trough, preferably punched, or a knob is formed by thermoforming. In the following process step, the packaging tray is filled, if necessary, and then a cover film is sealed onto the packaging tray, a gas exchange, if necessary, to extend the shelf life of the
Lebensmittels in der Verpackung vorgenommen wird. Danach oder gleichzeitig mit dem Siegeln wird durch Thermoverformung der Deckelfolie die Noppe(n) hergestellt oder die Aussparung(en) ausgestanzt. Die Herstellung der Noppe erfolgt vorzugsweise mit einem Stempel oder mit Druckluft, mit dem/der das zu verformende Material durch die Aussparung gedrückt wird.Food is made in the packaging. Afterwards or simultaneously with After sealing, the knob (s) is produced by thermoforming the cover film or the recess (s) are punched out. The knob is preferably manufactured with a stamp or with compressed air, with which the material to be deformed is pressed through the recess.
Beansprucht wird deshalb auch dieses erfindungsgemäße Verfahren.This method according to the invention is therefore also claimed.
Mit der erfindungsgemäßen Kunststoffverpackung ist es möglich, eine einmal geöffnete Verpackung haltbar, jedoch wieder lösbar zu verschließen. Das Verschließen bzw. öffnen ist für den Benutzer leicht durchführbar. Die Kunststoffverpackung ist einfach und kostengünstig herzustellen.With the plastic packaging according to the invention, it is possible to seal a packaging that has been opened once, but can be closed again in a releasable manner. Closing or opening is easy for the user. The plastic packaging is simple and inexpensive to manufacture.
Im Folgenden wird die Erfindung anhand Figur 1 erläutert. Die Erläuterungen sind lediglich beispielhaft und schränken den allgemeinen Erfindungsgedanken nicht ein.The invention is explained below with reference to FIG. 1. The explanations are only examples and do not limit the general idea of the invention.
Figur 1 zeigt eine erfindungsgemäße Kunststoffverpackung mit einem festen Teilsiegelbereich, bei der die Noppen in der Deckelfolie und die Aussparungen in der Verpackungsmulde sind.Figure 1 shows a plastic packaging according to the invention with a fixed partial sealing area, in which the knobs in the cover film and the recesses are in the packaging trough.
Figur 2 zeigt eine Kunststoffverpackung gemäß Figur 1 mit außerhalb des Siegelbereiches liegenden Noppen bzw. Aussparungen, wobei die Noppen an der Verpackungsmulde und die Aussparungen in der Deckelfolie vorliegen.FIG. 2 shows a plastic packaging according to FIG. 1 with knobs or recesses lying outside the sealing area, the knobs on the packaging trough and the recesses in the cover film.
Figur 1 zeigt eine erfindungsgemäße Kunststoffverpackung 1 , die aus einer Verpackungsmulde 2 und einer Deckelfolie 3 besteht. Die Verpackung weist einen Siegelbereich 4 auf, der waagerecht angeordnet ist und sich um die gesamte Verpackungsmulde 2 herum erstreckt. In diesem Siegelbereich 4 ist die Deckelfolie 3 an die Verpackungsmulde 2 gesiegelt, wobei die Deckelfolie in dem schwach gepunkteten Abschnitt des Siegelbereiches 4 peelbar an die Verpackungsmulde gesiegelt ist, während sie in dem stark gepunkteten Abschnitt des Siegelbereiches 4 fest an die Verpackungsmulde gesiegelt ist. Bei Öffnen wird die Deckelfolie nur an drei Seiten von der Verpackungsmulde abgezogen und bleibt im Abschnitt der festen Siegelung mit dieser verbunden. Die Deckelfolie, eine halbsteife Polyethylenterephtalat/EVOH/Polyethylen-Polybutylen-Folie, weist zwei näherungsweise zylinderförmige Noppen auf, die eine Länge von 4 mm und einen Durchmesser von 7 mm haben. Die Noppen 5 sind durch Thermoverformung mit einem Stempel in die Deckelfolie geprägt worden. Die Verpackungsmulde 2 weist zwei näherungsweise kreisförmige Aussparungen 6 auf, die den Noppen 5 gegenüberliegend angeordnet sind und einen Durchmesser von 7 mm haben.Figure 1 shows a plastic packaging 1 according to the invention, which consists of a packaging tray 2 and a cover film 3. The packaging has a sealing area 4, which is arranged horizontally and extends around the entire packaging trough 2. In this sealing area 4, the cover film 3 is sealed to the packaging trough 2, the cover film in the weakly dotted section of the sealing area 4 being peelably sealed to the packaging trough, while in the strongly dotted section of the sealing area 4 it is tightly sealed to the packaging trough. When opened, the cover film is only pulled off the packaging trough on three sides and remains connected to it in the section of the fixed seal. The cover film, a semi-rigid polyethylene terephthalate / EVOH / polyethylene-polybutylene film, has two approximately cylindrical knobs which have a length of 4 mm and a diameter of 7 mm. The knobs 5 have been stamped into the cover film by thermoforming with a stamp. The packaging tray 2 has two approximately circular recesses 6, which are arranged opposite the knobs 5 and have a diameter of 7 mm.
Der Fachmann erkennt, daß die Noppen 5 bzw. Aussparungen 6 auch an anderen Stellen der Kunststoffverpackung angeordnet und/oder neben den dargestellten zwei noch weitere Noppen/Aussparungen vorhanden sein können.The person skilled in the art recognizes that the knobs 5 or recesses 6 can also be arranged at other points in the plastic packaging and / or there can be further knobs / recesses in addition to the two shown.
Der Fachmann erkennt ferner, daß neben den Noppen noch weitere Wiederverschließungsmittel an der Veφackungsmulde bzw. der Deckelfolie angeordnet sein können.The person skilled in the art also recognizes that in addition to the knobs, further reclosure means can be arranged on the packaging trough or the cover film.
Nach dem Öffnen der Deckelfolie wird die Verpackung wieder verschlossen, indem die Noppen 5 in die Aussparungen 6 gedrückt werden und dort verbleiben, bis die Deckelfolie wieder abgezogen und die Noppen damit aus den Aussparungen gezogen werden.After opening the cover film, the packaging is closed again by pressing the knobs 5 into the recesses 6 and remaining there until the cover film is pulled off again and the knobs are thus pulled out of the recesses.
Selbstverständlich ist es auch möglich, daß der ganze Siegelbereich zwischen Deckelfolie und Verpackungsmulde peelbar ausgestaltet ist. Dann dienen die Noppe(n) bzw. Aussparungen nicht nur als Verschlußelement(e), sondern auch zum Justieren der Deckelfolie auf der Verpackungsmulde beim Wiederverschließen.Of course, it is also possible for the entire sealing area between the cover film and the packaging tray to be designed to be peelable. Then the knob (s) or recesses not only serve as a closure element (s), but also for adjusting the cover film on the packaging tray when reclosing.
In Figur 2 ist die Kunststoffverpackung 1 gemäß Figur 1 dargestellt, die Noppen 5 in der Verpackungsmulde 4 und die Aussparung 6 in der Deckelfolie 3, jeweils außerhalb des Siegelbereiches sich befinden. FIG. 2 shows the plastic packaging 1 according to FIG. 1, the knobs 5 in the packaging trough 4 and the recess 6 in the cover film 3, in each case outside the sealing area.

Claims

Patentansprüche: Patent claims:
1. Wiederverschließbare Kunststoffverpackung (1 ) aus einer Verpackungsmulde (2) und einer Deckelfolie (3), wobei die Deckelfolie (3) im Siegelbereich (4) mindestens teilweise peelbar an die Verpackungsmulde gesiegelt ist, dadurch gekennzeichnet, daß als Verschlußelemente die Deckelfolie (3) oder Verpackungsmulde (2) mindestens eine Noppe (5) und die Verpackungsmulde (2) oder die Deckelfolie (3) komplementär dazu mindestens eine Aussparung (6) aufweist, durch die die Noppe(n) beim Wiederverschließen der Kunststoffverpackung nach dem öffnen gesteckt wird bzw. werden.1. Reclosable plastic packaging (1) made of a packaging trough (2) and a lid film (3), the lid film (3) being at least partially peelably sealed to the packaging trough in the sealing area (4), characterized in that the lid film (3 ) or packaging trough (2) has at least one nub (5) and the packaging trough (2) or the cover film (3) has at least one recess (6) complementary to this, through which the nub (s) is inserted when the plastic packaging is resealed after opening or become.
2. Wiederverschließbare Kunststoffverpackung gemäß Anspruch 1 , dadurch gekennzeichnet, daß die Noppe(n) (5) und die Aussparung(en) (6) näher zum Rand (7) der Kunststoffverpackung (1) angeordnet ist/sind als der Siegelbereich (4).2. Reclosable plastic packaging according to claim 1, characterized in that the knob(s) (5) and the recess(s) (6) is/are arranged closer to the edge (7) of the plastic packaging (1) than the sealing area (4) .
3. Wiederverschließbare Kunststoffverpackung gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Form der Noppe(n) (5) näherungsweise zylindrisch und die Aussparung(en) näherungsweise kreisförmig ist bzw. sind.3. Reclosable plastic packaging according to claim 1 or 2, characterized in that the shape of the knob(s) (5) is approximately cylindrical and the recess(s) is or are approximately circular.
4. Wiederverschließbare Kunststoffverpackung gemäß einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Durchmesser der Noppe > dem Durchmesser der Aussparung ist.4. Reclosable plastic packaging according to one of claims 1 to 3, characterized in that the diameter of the knob is > the diameter of the recess.
5. Wiederverschließbare Kunststoffverpackung gemäß einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Deckelfolie aus einer thermoformbaren Folie aus Polyethylenterephtalat oder Polypropylen ggf. mit einer Ethylenvinylalkoholcopolymersperrschicht und Polyethylen aufgebaut ist und die Veφackungsmulde aus einer geschäumten Polyolefin-Folie, vorzugsweise einer geschäumten Polypropylen-Folie, als Basisschicht mit ggf. einer Gassperrschicht und einer peelbaren Siegelschicht aufgebaut ist.5. Reclosable plastic packaging according to one of claims 1 to 3, characterized in that the cover film is made of a thermoformable film made of polyethylene terephthalate or polypropylene, optionally with an ethylene vinyl alcohol copolymer barrier layer and polyethylene, and the packaging trough is made of a foamed polyolefin film, preferably a foamed polypropylene film. Film is constructed as a base layer with, if necessary, a gas barrier layer and a peelable sealing layer.
6. Wiederverschließbare Kunststoffverpackung gemäß einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Siegelbereich (4) vollständig peelbar ist. 6. Reclosable plastic packaging according to one of claims 1 to 5, characterized in that the sealing area (4) is completely peelable.
7. Wiederverschließbare Kunststoffverpackung gemäß einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß eine Seite bzw. 5 - 25 % des Siegelbereichs fest gesiegelt ist.7. Reclosable plastic packaging according to one of claims 1 to 5, characterized in that one side or 5 - 25% of the sealing area is firmly sealed.
8. Wiederverschließbare Kunststoffverpackung gemäß Anspruch 7, dadurch gekennzeichnet, daß sich die Noppe(n) und entsprechenden Aussparung(en) außerhalb des festen Siegelbereiches befinden.8. Reclosable plastic packaging according to claim 7, characterized in that the knob(s) and corresponding recess(s) are located outside the fixed sealing area.
9. Verfahren zur Herstellung einer Kunststoffverpackung gemäß einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß9. A method for producing a plastic packaging according to one of claims 1 to 8, characterized in that
1. die Verpackungsmulde durch Thermoverformen aus einer Folie hergestellt, entweder1. the packaging tray is made from a film by thermoforming, either
2. mindestens eine Aussparung in der Verpackungsmulde angebracht, vorzugsweise gestanzt,2. at least one recess is made in the packaging tray, preferably punched,
3. die Veφackungsmulde gegebenenfalls befüllt,3. the packaging trough filled if necessary,
4. eine Deckelfolie an die Veφackungsmulde gesiegelt und4. a cover film is sealed to the packaging trough and
5. die komplementäre Noppe durch Thermoverformung der Deckelfolie hergestellt wird, oder5. the complementary knob is produced by thermoforming the cover film, or
2a. mindestens eine Noppe in dem Randbereich der gemäß 1. gebildeten Verpackungsmulde geformt und2a. at least one knob is formed in the edge region of the packaging trough formed according to 1. and
5a. in die Deckelfolie vor oder beim Versiegeln mit der Verpackungsmulde mindestens eine komplementäre Aussparung aufgebracht wird.5a. At least one complementary recess is made in the cover film before or during sealing with the packaging tray.
10. Verfahren gemäß Anspruch 9, dadurch gekennzeichnet, daß die Verfahrensschritte 1, 2 und/oder die Verfahrensschritte 4, 5 gleichzeitig durchgeführt werden.10. The method according to claim 9, characterized in that method steps 1, 2 and / or method steps 4, 5 are carried out simultaneously.
11. Verfahren gemäß Anspruch 9, dadurch gekennzeichnet, daß die Verfahrensschritte 1, 2a. und/oder die Verfahrensschritte 4, 5a. gleichzeitig durchgeführt werden. Verfahren gemäß Anspruch 9 bis 11 , dadurch gekennzeichnet, daß die Herstellung der Noppe mit einem Stempel oder mit Druckluft erfolgt. 11. The method according to claim 9, characterized in that method steps 1, 2a. and/or method steps 4, 5a. be carried out simultaneously. Method according to claims 9 to 11, characterized in that the nub is produced with a stamp or with compressed air.
EP99963441A 1998-12-21 1999-12-09 Resealable plastic packaging with at least one knob Expired - Lifetime EP1140653B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19859042 1998-12-21
DE19859042A DE19859042A1 (en) 1998-12-21 1998-12-21 Resealable plastic packaging with at least one knob
PCT/EP1999/009675 WO2000037335A1 (en) 1998-12-21 1999-12-09 Resealable plastic packaging container with at least one knob

Publications (3)

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EP1140653A1 true EP1140653A1 (en) 2001-10-10
EP1140653B1 EP1140653B1 (en) 2003-08-06
EP1140653B2 EP1140653B2 (en) 2007-12-19

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EP99963441A Expired - Lifetime EP1140653B2 (en) 1998-12-21 1999-12-09 Resealable plastic packaging with at least one knob

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EP (1) EP1140653B2 (en)
AT (1) ATE246645T1 (en)
AU (1) AU1974000A (en)
CA (1) CA2356663A1 (en)
CZ (1) CZ20012229A3 (en)
DE (2) DE19859042A1 (en)
DK (1) DK1140653T3 (en)
ES (1) ES2172493T3 (en)
NO (1) NO322029B1 (en)
PL (1) PL349429A1 (en)
WO (1) WO2000037335A1 (en)

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WO2000037335A1 (en) 2000-06-29
EP1140653B1 (en) 2003-08-06
NO322029B1 (en) 2006-08-07
ATE246645T1 (en) 2003-08-15
NO20012810L (en) 2001-06-07
DE19859042A1 (en) 2000-06-29
CA2356663A1 (en) 2000-06-29
AU1974000A (en) 2000-07-12
CZ20012229A3 (en) 2002-07-17
DE59906541D1 (en) 2003-09-11
ES2172493T3 (en) 2004-05-16
DK1140653T3 (en) 2003-12-01
PL349429A1 (en) 2002-07-29
NO20012810D0 (en) 2001-06-07
EP1140653B2 (en) 2007-12-19
ES2172493T1 (en) 2002-10-01

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