EP0790193A1 - Opening device for a flanged foil-sealed container - Google Patents

Opening device for a flanged foil-sealed container Download PDF

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Publication number
EP0790193A1
EP0790193A1 EP97400302A EP97400302A EP0790193A1 EP 0790193 A1 EP0790193 A1 EP 0790193A1 EP 97400302 A EP97400302 A EP 97400302A EP 97400302 A EP97400302 A EP 97400302A EP 0790193 A1 EP0790193 A1 EP 0790193A1
Authority
EP
European Patent Office
Prior art keywords
layer
cover
tongue
varnish
adhering
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
EP97400302A
Other languages
German (de)
French (fr)
Other versions
EP0790193B1 (en
Inventor
Laurent F. Kretz
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.)
Amcor Flexibles Selestat SAS
Original Assignee
Alsacienne DAluminium
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 Alsacienne DAluminium filed Critical Alsacienne DAluminium
Publication of EP0790193A1 publication Critical patent/EP0790193A1/en
Application granted granted Critical
Publication of EP0790193B1 publication Critical patent/EP0790193B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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

Definitions

  • the present invention relates to a container comprising a peripheral rim on which a cover is fixed by heat-sealing, said cover comprising a lower heat-sealable layer sealed against the peripheral rim and a metal upper layer adhering to the heat-sealable layer, the latter being peelable from the rim. peripheral by exerting manual traction on a tongue fitted to said cover.
  • This type of container is used in particular to contain drinks or other food or medical products.
  • the upper layer must be rigid enough to allow the cover to be removed by peeling and without tearing and perfectly waterproof. It is generally metallic.
  • the tongue is part of the cover and it is arranged outside the sealing bead. It must have a sufficient surface to allow the user to start the coat without too much difficulty.
  • the lids and the containers are separated together by cutting using cutting tools installed on the same chain.
  • the outline of the cover and the outline of the return of the container are superimposed.
  • the tongue is in this case disposed above a rim portion which can be separated from the rim itself by a pre-cut line of weakness. This rim portion should separate from the container when pulling on the tab. In the absence of a line of weakness, the user must move the tab away from this edge portion before peeling.
  • the tongue has a relatively small surface compared to the total surface of the cover, and peeling can be difficult or even impossible, in particular if the cover adheres strongly to the rim by heat sealing.
  • the object of the present invention is to overcome these drawbacks, by proposing a large tongue.
  • the tongue consists of a metal sheet capable of completely covering the metal layer of the cover, said metal sheet being bonded to the metal layer of the cover, at a level lateral segment, by a layer of a material adhering to the metallic layer and to the metallic foil, and the adhering material covers the entire underside of the metallic foil, a varnish not adhering to the metallic layer and not reactivable when hot being applied against the underside of the layer of material adhering in the area outside the lateral segment.
  • This varnish is for example a cellulosic varnish.
  • the adherent material is chosen from materials having a strong adhesion. It can in particular be an Ethylene Acryclic Acid copolymer.
  • a container 1 comprising a peripheral rim 2 on which a seal 3 is heat sealed.
  • the container 1 shown in the drawings is in the form of a frustoconical cup containing a liquid 4.
  • This cup can be produced by thermoforming a strip of polypropylene, coated cardboard or PVC.
  • the cover 3 essentially comprises two layers: an upper layer 5 of aluminum and a lower heat-sealable layer 6 adhering to the aluminum layer 5 and bonded to the material of the peripheral rim 2 according to a weld bead 7.
  • a tongue 10 is disposed above the cover 3, this tongue consists of an aluminum sheet 11 which completely covers the aluminum layer 5 and whose outline corresponds strictly to the lid outline 2.
  • the aluminum sheet 11 has on its underside a layer 12 of a material strongly adhering to aluminum, an Ethylene Acrylic Acid copolymer for example.
  • a layer of varnish 13 is applied which is not adherent to aluminum and cannot be reactivated when hot.
  • the varnish is applied to most of the surface of the layer 13 with the exception of a segment 14 delimited by a cord 15 and a portion 16 of the contour layer 12 device, the cord 15 connecting the ends of this portion 16.
  • the layer 12 of adhering material adheres to the aluminum layer 5. Outside of segment 14, the cover 2 and the tongue 10 are joined but are not linked to each other due to the layer of varnish 13.
  • the surface of the segment 14 and the choice of the material adhering to the layer 12 are calculated in such a way that the force 21 causes the opening of the container 1 by peeling off the cover 3 and does not cause the pulling of the tongue 10 of cover 3.
  • the cover 3 and the tongue 10 described above can advantageously be drawn from the same strip of composite material, comprising the five superposed layers 6, 5, 13, 12, 11 constituting the cover 3 and the tongue 10 , during the cutting phase of the containers 1 filled and closed on the container production and packaging line.
  • the aluminum layers 5 and 11 can obviously be replaced by other materials, in particular polyester or paper depending on the use.
  • the aluminum layers 5 and 11 preferably have a thickness of between 12 and 60 micrometers.
  • the density of layer 12 of Ethylene Acrylic Acid copolymer is twenty grams per square meter.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Laminated Bodies (AREA)
  • Closing Of Containers (AREA)
  • Package Closures (AREA)
  • Closures For Containers (AREA)
  • Control And Other Processes For Unpacking Of Materials (AREA)

Abstract

The container made, e.g. from moulded polypropylene, coated card or PVC, has a lid (3) made from an upper metal layer (5) stuck to a thermo-seal layer (6) which is detachable from the rim (2) of the container by pulling on a tongue (10) fixed to the lid. The tongue (10) is made from a layer of metal foil which covers the whole of the metal surface of the lid and is attached to it across one lateral segment (14) by a layer of a material (12) which adheres to both metal layers. The adhesive material (12) covers the whole of the under surface of the tongue, and is partially coated with a non-adhesive varnish (13). The adhesive material is an ethylene acid acrylic copolymer, and the varnish is a nitrocellulose varnish.

Description

La présente invention concerne un récipient comportant un rebord périphérique sur lequel un opercule est fixé par thermoscellage, ledit opercule comportant une couche inférieure thermoscellable scellée contre le rebord périphérique et une couche supérieure métallique adhérant à la couche thermoscellable, cette dernière étant séparable par pelage du rebord périphérique en exerçant une traction manuelle sur une languette équipant ledit opercule.The present invention relates to a container comprising a peripheral rim on which a cover is fixed by heat-sealing, said cover comprising a lower heat-sealable layer sealed against the peripheral rim and a metal upper layer adhering to the heat-sealable layer, the latter being peelable from the rim. peripheral by exerting manual traction on a tongue fitted to said cover.

Ce type de récipient est notamment utilisé pour contenir des boissons ou d'autres produits alimentaires ou médicaux. La couche supérieure doit être suffisamment rigide pour permettre l'enlèvement de l'opercule par pelage et sans déchirure et parfaitement imperméable. Elle est généralement métallique.This type of container is used in particular to contain drinks or other food or medical products. The upper layer must be rigid enough to allow the cover to be removed by peeling and without tearing and perfectly waterproof. It is generally metallic.

En général la languette fait partie de l'opercule et elle est disposée à l'extérieur du cordon de scellement. Elle doit avoir une surface suffisante pour permettre à l'utilisateur de réaliser l'amorce du pelage sans trop de difficultés.In general, the tongue is part of the cover and it is arranged outside the sealing bead. It must have a sufficient surface to allow the user to start the coat without too much difficulty.

Lorsque les récipients sont réalisés par thermoformage d'une feuille plastique, remplis et scellés sur une même chaîne de conditionnements, les opercules et les récipients sont séparés ensemble par découpe au moyens d'outils de découpe installés sur la même chaîne. Dans ce cas, le contour de l'opercule et le contour du retour du récipient sont superposés. La languette est dans ce cas disposée au-dessus d'une portion de rebord qui peut-être séparée du rebord proprement dit par une ligne de faiblesse prédécoupée. Cette portion de rebord doit se séparer du récipient lorsqu'on exerce une traction sur la languette. En l'absence de ligne de faiblesse, l'utilisateur doit écarter la languette de cette portion de rebord avant de procéder au pelage.When the containers are made by thermoforming a plastic sheet, filled and sealed on the same packaging line, the lids and the containers are separated together by cutting using cutting tools installed on the same chain. In this case, the outline of the cover and the outline of the return of the container are superimposed. The tongue is in this case disposed above a rim portion which can be separated from the rim itself by a pre-cut line of weakness. This rim portion should separate from the container when pulling on the tab. In the absence of a line of weakness, the user must move the tab away from this edge portion before peeling.

Toutefois, dans ces deux cas, la languette a une surface relativement faible par rapport à la surface totale de l'opercule, et le pelage peut être difficile voire impossible, notamment si l'opercule adhère fortement au rebord par thermoscellage.However, in these two cases, the tongue has a relatively small surface compared to the total surface of the cover, and peeling can be difficult or even impossible, in particular if the cover adheres strongly to the rim by heat sealing.

Le but de la présente invention est de pallier ces inconvénients, en proposant une languette de grande dimension.The object of the present invention is to overcome these drawbacks, by proposing a large tongue.

L'invention atteint son but par le fait que la languette est constituée d'une feuille métallique susceptible de recouvrir totalement la couche métallique de l'opercule, ladite feuille métallique étant liée à la couche métallique de l'opercule, au niveau d'un segment latéral, par une couche d'un matériau adhérant à la couche métallique et à la feuille métallique, et le matériau adhérant recouvre la totalité de la face inférieure de la feuille métallique, un vernis non adhérant à la couche métallique et non réactivable à chaud étant appliqué contre la face inférieure de la couche de matériau adhérant dans la zone extérieure au segment latéral. Ce vernis est par exemple un vernis cellulosique.The invention achieves its object by the fact that the tongue consists of a metal sheet capable of completely covering the metal layer of the cover, said metal sheet being bonded to the metal layer of the cover, at a level lateral segment, by a layer of a material adhering to the metallic layer and to the metallic foil, and the adhering material covers the entire underside of the metallic foil, a varnish not adhering to the metallic layer and not reactivable when hot being applied against the underside of the layer of material adhering in the area outside the lateral segment. This varnish is for example a cellulosic varnish.

Le matériau adhérant est choisi parmi les matériaux ayant une forte adhérence. Ce peut être notamment un copolymère Ethylène Acide Acryclique.The adherent material is chosen from materials having a strong adhesion. It can in particular be an Ethylene Acryclic Acid copolymer.

D'autres avantages et caractéristiques de l'invention ressortiront à la lecture de la description suivante faite à titre d'exemple non limitatif et en référence aux dessins annexés dans lesquels:

  • la figure 1 montre en coupe un récipient à rebord scellé par un opercule muni d'une languette selon l'invention,
  • la figure 2 montre à grande échelle les diverses couches de l'opercule et de la languette, cette dernière étant écartée de l'opercule par souci de clarté,
  • les figures 3 et 4 montrent les différentes étapes à réaliser pour ouvrir le récipient.
Other advantages and characteristics of the invention will emerge on reading the following description given by way of nonlimiting example and with reference to the appended drawings in which:
  • FIG. 1 shows in section a container with a rim sealed with a cover provided with a tab according to the invention,
  • FIG. 2 shows on a large scale the various layers of the cover and of the tongue, the latter being separated from the cover for the sake of clarity,
  • Figures 3 and 4 show the different steps to perform to open the container.

Sur les dessins on a représenté par la référence 1 un récipient 1 comportant un rebord périphérique 2 sur lequel est scellé par thermoscellage un opercule 3.In the drawings, there is shown by the reference 1 a container 1 comprising a peripheral rim 2 on which a seal 3 is heat sealed.

Le récipient 1 montré sur les dessins se présente sous la forme d'un gobelet tronconique contenant un liquide 4. Ce gobelet peut être réalisé par thermoformage d'une bande de polypropylène, de carton enduit ou de PVC.The container 1 shown in the drawings is in the form of a frustoconical cup containing a liquid 4. This cup can be produced by thermoforming a strip of polypropylene, coated cardboard or PVC.

L'opercule 3 comporte essentiellement deux couches: une couche supérieure 5 en aluminium et une couche inférieure 6 thermoscellable adhérant à la couche en aluminium 5 et liée au matériau du rebord périphérique 2 selon un cordon de soudure 7.The cover 3 essentially comprises two layers: an upper layer 5 of aluminum and a lower heat-sealable layer 6 adhering to the aluminum layer 5 and bonded to the material of the peripheral rim 2 according to a weld bead 7.

Pour permettre l'ouverture du récipient 1, une languette 10 est disposée au-dessus de l'opercule 3, cette languette est constituée par une feuille d'aluminium 11 qui recouvre totalement la couche d'aluminium 5 et dont le contour correspond rigoureusement au contour de l'opercule 2.To allow the opening of the container 1, a tongue 10 is disposed above the cover 3, this tongue consists of an aluminum sheet 11 which completely covers the aluminum layer 5 and whose outline corresponds strictly to the lid outline 2.

La feuille d'aluminium 11 comporte sur sa face inférieure une couche 12 d'un matériau adhérant fortement à l'aluminium, un copolymère Ethylène Acide Acrylique par exemple. Sous la face inférieure de la couche 12, on applique une couche de vernis 13 non adhérant à l'aluminium et non réactivable à chaud. Le vernis est appliqué sur la plus grande partie de la surface de la couche 13 à l'exception d'un segment 14 délimité par une corde 15 et une portion 16 du contour périphérique de la couche 12, la corde 15 reliant les extrémités de cette portion 16.The aluminum sheet 11 has on its underside a layer 12 of a material strongly adhering to aluminum, an Ethylene Acrylic Acid copolymer for example. Under the underside of the layer 12, a layer of varnish 13 is applied which is not adherent to aluminum and cannot be reactivated when hot. The varnish is applied to most of the surface of the layer 13 with the exception of a segment 14 delimited by a cord 15 and a portion 16 of the contour layer 12 device, the cord 15 connecting the ends of this portion 16.

Au niveau du segment 14, la couche 12 de matériau adhérant adhère à la couche en aluminium 5. En dehors du segment 14, l'opercule 2 et la languette 10 sont jointifs mais ne sont pas liés entre eux du fait de la couche de vernis 13.At the level of segment 14, the layer 12 of adhering material adheres to the aluminum layer 5. Outside of segment 14, the cover 2 and the tongue 10 are joined but are not linked to each other due to the layer of varnish 13.

Pour ouvrir le récipient 1 on procède de la manière suivante: on relève la languette 10 à la verticale dans le sens indiqué par la flèche 20, puis on exerce sur la languette 10, à l'aide d'une main, une force 21 dirigée vers le haut en tenant le récipient 1 de l'autre main.To open the container 1, proceed as follows: the tongue 10 is raised vertically in the direction indicated by the arrow 20, then a force 21 is directed on the tongue 10, using a hand upward while holding container 1 with the other hand.

La surface du segment 14 et le choix du matériau adhérant de la couche 12 sont calculés de telle manière que la force 21 provoque l'ouverture du récipient 1 par pelage de l'opercule 3 et ne provoque pas l'arrachage de la languette 10 de l'opercule 3.The surface of the segment 14 and the choice of the material adhering to the layer 12 are calculated in such a way that the force 21 causes the opening of the container 1 by peeling off the cover 3 and does not cause the pulling of the tongue 10 of cover 3.

La disposition de la languette 10 décrite ci-dessus permet une préhension aisée de cette dernière et une facilité d'ouverture du récipient 1.The arrangement of the tongue 10 described above allows easy gripping of the latter and ease of opening of the container 1.

L'opercule 3 et la languette 10 décrits ci-dessus peuvent être avantageusement tirés d'une même bande de matériau composite, comportant les cinq couches superposées 6, 5, 13, 12, 11 constitutives de l'opercule 3 et de la languette 10, au cours de la phase de découpe des récipients 1 remplis et obturés sur la chaîne de fabrication et de conditionnement des récipients.The cover 3 and the tongue 10 described above can advantageously be drawn from the same strip of composite material, comprising the five superposed layers 6, 5, 13, 12, 11 constituting the cover 3 and the tongue 10 , during the cutting phase of the containers 1 filled and closed on the container production and packaging line.

Les couches d'aluminium 5 et 11 peuvent évidemment être remplacés par d'autres matériaux, notamment du polyester ou du papier en fonction de l'usage.The aluminum layers 5 and 11 can obviously be replaced by other materials, in particular polyester or paper depending on the use.

Les couches d'aluminium 5 et 11 ont de préférence une épaisseur comprise entre 12 et 60 micromètres. La densité de la couche 12 de copolymère Ethylène Acide Acrylique est de vingt grammes par mètre carré.The aluminum layers 5 and 11 preferably have a thickness of between 12 and 60 micrometers. The density of layer 12 of Ethylene Acrylic Acid copolymer is twenty grams per square meter.

Claims (3)

Récipient comportant un rebord périphérique (2) sur lequel un opercule (3) est fixé par thermoscellage, ledit opercule (3) comportant une couche inférieure (6) thermoscellable scellée contre le rebord périphérique (2) et une couche supérieure (5) métallique adhérant à la couche thermoscellable (6), cette dernière étant séparable par pelage du rebord périphérique (2) en exerçant une traction manuelle sur une languette (10) équipant ledit opercule (3),
   caractérisé par le fait que la languette (10) est constituée d'une feuille métallique (11) susceptible de recouvrir totalement la couche métallique (5) de l'opercule (3), ladite feuille métallique (11) étant liée à la couche métallique (5) de l'opercule (2), au niveau d'un segment latéral (14), par une couche (12) d'un matériau adhérant à la couche métallique (5) et à la feuille métallique (11), et par le fait que le matériau adhérant recouvre la totalité de la face inférieure de la feuille métallique (11), un vernis (13) non adhérant à la couche métallique (5) et non réactivable à chaud étant appliqué contre la face inférieure de la couche (12) de matériau adhérant dans la zone extérieure au segment latéral (14).Container comprising a peripheral rim (2) to which a cover (3) is fixed by heat-sealing, said cover (3) comprising a bottom heat-sealable layer (6) sealed against the peripheral rim (2) and an adherent upper metal layer (5) to the heat-sealable layer (6), the latter being separable by peeling the peripheral rim (2) by exerting manual traction on a tab (10) equipping said cover (3),
characterized in that the tongue (10) consists of a metallic sheet (11) capable of completely covering the metallic layer (5) of the cover (3), said metallic sheet (11) being bonded to the metallic layer (5) of the cover (2), at a lateral segment (14), by a layer (12) of a material adhering to the metallic layer (5) and to the metallic foil (11), and by the fact that the adhering material covers the entire underside of the metal sheet (11), a varnish (13) not adhering to the metal layer (5) and not heat-reactivable being applied against the underside of the layer (12) of material adhering in the area outside the lateral segment (14). Récipient selon la revendication 1,
   caractérisé par le fait que le matériau adhérant est un copolymère Ethylène Acide Acrylique.Container according to claim 1,
characterized in that the adhering material is an Ethylene Acrylic Acid copolymer. Récipient selon la revendication 1,
   caractérisé par le fait que le vernis est un vernis nitrocellulosique.Container according to claim 1,
characterized by the fact that the varnish is a nitrocellulose varnish.
EP97400302A 1996-02-19 1997-02-11 Opening device for a flanged foil-sealed container Expired - Lifetime EP0790193B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9602011 1996-02-19
FR9602011A FR2744986B1 (en) 1996-02-19 1996-02-19 DEVICE FOR OPENING A CONTAINER WITH A LID

Publications (2)

Publication Number Publication Date
EP0790193A1 true EP0790193A1 (en) 1997-08-20
EP0790193B1 EP0790193B1 (en) 2002-07-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP97400302A Expired - Lifetime EP0790193B1 (en) 1996-02-19 1997-02-11 Opening device for a flanged foil-sealed container

Country Status (6)

Country Link
US (1) US5709310A (en)
EP (1) EP0790193B1 (en)
JP (1) JPH09323759A (en)
AT (1) ATE221497T1 (en)
DE (1) DE69714313D1 (en)
FR (1) FR2744986B1 (en)

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US3151800A (en) * 1962-07-27 1964-10-06 Ekco Containers Inc Hermetically sealed container
WO1990009934A1 (en) * 1989-02-27 1990-09-07 Minnesota Mining And Manufacturing Company Internally delaminating tabbed innerseal for a container and method of applying
WO1993013999A1 (en) * 1992-01-16 1993-07-22 Blanchard Floyd W Peelable container seal
US5265745A (en) * 1992-04-08 1993-11-30 Minnesota Mining And Manufacturing Company Tamper evident top tab innerseal

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002062677A1 (en) * 2001-02-07 2002-08-15 Webcater Ltd. Glue stick package
EP3949732A1 (en) * 2015-08-03 2022-02-09 Gen-Probe Incorporated A receptacle for receiving one or more substances to be lyophilized
US11668525B2 (en) 2015-08-03 2023-06-06 Gen-Probe Incorporated Apparatus for maintaining a controlled environment
US11781811B2 (en) 2015-08-03 2023-10-10 Gen-Probe Incorporated Apparatus for maintaining a controlled environment
EP3184460A1 (en) * 2015-12-21 2017-06-28 Dow Global Technologies LLC Rigid packaging with a straining feature
WO2017112512A1 (en) * 2015-12-21 2017-06-29 Dow Global Technologies Llc Rigid packaging with a straining feature
US10589904B2 (en) 2015-12-21 2020-03-17 Dow Global Technologies Llc Flexible packaging with a straining feature
US10829288B2 (en) 2015-12-21 2020-11-10 Dow Global Technologies Llc Rigid packaging with a straining feature

Also Published As

Publication number Publication date
FR2744986B1 (en) 1998-05-07
FR2744986A1 (en) 1997-08-22
DE69714313D1 (en) 2002-09-05
EP0790193B1 (en) 2002-07-31
ATE221497T1 (en) 2002-08-15
JPH09323759A (en) 1997-12-16
US5709310A (en) 1998-01-20

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