EP0406109B1 - Récipient thermoplastique à ouverture par pelage partiel d'un couvercle multicouche thermosoudé sur le rebord de ce dernier et film couvercles multicouches - Google Patents

Récipient thermoplastique à ouverture par pelage partiel d'un couvercle multicouche thermosoudé sur le rebord de ce dernier et film couvercles multicouches Download PDF

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Publication number
EP0406109B1
EP0406109B1 EP90401842A EP90401842A EP0406109B1 EP 0406109 B1 EP0406109 B1 EP 0406109B1 EP 90401842 A EP90401842 A EP 90401842A EP 90401842 A EP90401842 A EP 90401842A EP 0406109 B1 EP0406109 B1 EP 0406109B1
Authority
EP
European Patent Office
Prior art keywords
sheet
container
internal
layer
edge
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.)
Expired - Lifetime
Application number
EP90401842A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0406109A1 (fr
Inventor
Roland Torterotot
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.)
Erca Holding SARL
Original Assignee
Erca Holding SARL
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Erca Holding SARL filed Critical Erca Holding SARL
Publication of EP0406109A1 publication Critical patent/EP0406109A1/fr
Application granted granted Critical
Publication of EP0406109B1 publication Critical patent/EP0406109B1/fr
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
    • B65D77/2044—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure
    • B65D77/2048—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure whereby part of the container or cover has been weakened, e.g. perforated or precut
    • B65D77/2056—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure whereby part of the container or cover has been weakened, e.g. perforated or precut the cover being weakened
    • B65D77/206—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure whereby part of the container or cover has been weakened, e.g. perforated or precut the cover being weakened so as to uncover one or more preformed openings made through some layers of 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
    • B65D2577/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks, bags
    • B65D2577/10—Container closures formed after filling
    • B65D2577/20—Container closures formed after filling by applying separate lids or covers
    • B65D2577/2075—Lines of weakness or apertures
    • B65D2577/2091—Lines of weakness or apertures in cover

Definitions

  • the present invention relates to a multilayer thermoplastic container with partial peeling opening of a multilayer heat-sealed cover on the rim of said container and comprising, from bottom to top, a simple or complex tear-resistant internal sheet permanently heat-sealed on the rim of said container, a sheet simple or complex intermediate provided with an access opening or a curved line of incision or opening weakening and firmly adhering to said internal sheet at least outside the zone delimited by said access opening or curved incision line at least partially closed, as well as an external sheet, simple or complex, adhering, on the one hand, in a peelable manner, to the intermediate sheet outside said zone delimited by the access opening or the curved line of incision formed in this intermediate sheet, and, on the other hand, in a firm and non-peelable manner, either directly to a part of the internal sheet passing through said access opening, ie to the intermediate sheet inside the zone delimited by said incision line, said container further comprising a peel primer to facilitate gripping of the external sheet
  • the internal sheet of the multilayer cover is hermetically sealed on the layer of thermoplastic material of the same nature on the rim of the container with a complex wall, so that it is difficult, if not difficult, or even impossible, to grasp the edge of said cover in order to peel the outer sheet to uncover the access opening of the container.
  • FR-A-2 551 031 Another known proposal for making a peel primer (FR-A-2 551 031) consists in forming on an edge of the cover between the intermediate sheet and the outer sheet thereof, a zone of non-adhesion by a special treatment. of non-adhesion of one or the other of these two sheets. This non-stick treatment is expensive and the desired effects of it are often destroyed when the lid is heat sealed on the rim of the container.
  • the edge of the cover is crimped by the effect of the cutting punches, in particular with the cutting profile necessary for multilayers.
  • An object of the present invention is to eliminate, or at least mitigate these drawbacks and to provide a container of the type initially mentioned whose outer cover sheet can be gripped and peeled easily.
  • the peeling primer comprises at least one shallow notch formed either in the multilayer cover or in the rim of the container from the heat sealing plane of the cover on said rim , so as to define between the latter and the inner sheet of the cover a narrow gripping cavity open on the superimposed edges of the cover and the rim and delimited by the inner sheet of the cover and an inner layer of the container made of an adherent thermoplastic material firmly by heat sealing to the inner sheet of the cover and that opposite the junction zone between the inner sheet of the cover and the inner layer of the container, the intermediate sheet of the cover has a tearing edge facilitating the tearing of the inner sheet of the cover in the primer area peeling, and peeling the outer sheet of said cover to release the access opening.
  • the outer sheet of the cover can be grasped without difficulty and be peeled after the inner sheet of said cover has been torn in the peeling primer area.
  • the invention also relates to a complex strip containing a plurality of multi-layer contiguous covers and comprising from bottom to top: a single or complex layer of tearable thermoplastic capable of being heat-sealed permanently on the rim of a thermoplastic multi-layer container , at the location of the inner layer thereof; a simple or complex intermediate layer provided, above the mouth of the container, with an access opening cut out in said intermediate layer or delimited by a curved incision line at least partially closed and firmly adhering to said internal layer of said complex strip, at least outside the zone delimited by said access opening or said incision line, as well as a single or complex external layer adhering, on the one hand, peelably to the intermediate layer in outside the zone delimited by the access opening or the curved line of incision formed in this intermediate layer, and, on the other hand, in a firm and non-peelable manner, either directly to a part of the internal layer passing through said access opening, either to the intermediate layer inside the zone delimited by said curved line of incision,
  • Another object of the invention is to provide a complex strip with lids making it possible to produce on the thermoplastic receptacles provided with lids fixed on the rim thereof by heat sealing or autogenous thermosealing, a peel primer which is easy to grip and does not could be destroyed during said heat sealing.
  • the internal layer of the cover strip not only adheres to the underside of the intermediate layer up to the edge of the cover which will subsequently be cut from the complex strip, but also covers the notch of the intermediate layer, and the gripping cavity is then formed between the cover with a flat lower face and the depression or notch zone formed by thermoforming in the rim of the container at the location of the primer zone.
  • the intermediate layer of the cover strip when in the region of the peeling primer, has a recess extending over the entire thickness of this intermediate layer and the inner layer adheres directly to the outer layer, the side wall of this recess comprising a tear edge for said inner layer.
  • the rim of the container may have a completely flat upper surface or include, at the location of the peel initiation zone, a depression or notch zone which deviates from the heat-sealing plane between the lid. and the container rim and which is formed by thermoforming in the latter at the location of said initiation zone.
  • the thermoplastic container 1 obtained in a known manner by thermoforming from of a complex thermoplastic strip, not shown, comprises a vertical wall 2 and a horizontal rim 3, the wall 2 and the rim 3 consisting of an internal layer 4 and an external layer 5 firmly adhering to each other , the inner layer 4 being for example made of polyethylene and the outer layer 5 of polyester.
  • the materials of the container 1 can be changed without it being important for the object of the invention provided that the rules of the art are observed.
  • a complex cover 6 with multiple layers or sheets is heat-sealed on the rim 3 of the container 1 with the exception of a peel initiation zone generally designated by the reference 7.
  • the complex cover 6 is obtained by cutting (see arrow D of FIG. 3) from a complex strip called lids 8, part of which is shown in FIG. 3.
  • the cover 6 or the strip with lids 8 comprising several superimposed sheets or layers which are from bottom to top: an internal heat-sealable thermoplastic sheet or layer 9 of identical or similar nature to that of the internal layer 4 of the container 1, for example made of polyethylene; a sheet or intermediate layer 10, for example of polyester, firmly adhering to said sheet or internal layer 9; and an outer sheet or layer 11 made for example of an aluminum film 11a coated on its underside with a thin film of PVC 11b or other suitable material.
  • the different sheets or layers 4, 5, 9, 10, 11 can be simple or complex layers, that is to say made up of several thin films adhering more or less strongly to neighboring films or layers.
  • the cover 6 and the cover strip 8 comprising a plurality of these covers juxtaposed and joined to each other, have, above the upper mouth 12 of the container 1, preferably near the vertical wall 2 of the latter a curved line of incision 13 at least partially closed on itself and preferably entirely closed or contiguous, line of incision 13 preferably made from bottom to top in the sheet or intermediate layer 10.
  • This curved line of incision 13 preferably extends over the entire thickness of the intermediate sheet 10 and has for example a triangular cross section whose base is covered by the inner sheet 9 like the rest of the underside of said sheet 10.
  • the outer wall of the incision line 13 delimits the access opening 14 inside the container 1, access opening which will subsequently be completely cleared during the peeling of the external sheet 11 of the cover 6, it being understood that the internal sheet 9 tears under the action peeling along one of the tearing edges which constitute the lower and upper edges of the access opening 14.
  • the heat-sealing or heat-sealing plane between the cover 6 and the reb ord 3 of the container is horizontal and is delimited on both sides by the inner layer 4 of the container 1 and the inner sheet 9 of said cover 6.
  • the same thermoplastic material is used allowing to perform an autogenous heat sealing or at least a sealing having the strongest adhesions existing between two neighboring layers or sheets.
  • the peel primer 7 which will be provided at the most suitable location and preferably in the immediate vicinity of the access opening 14 and a sufficient distance from the vertical wall 2 of the container to allow sealing correct and tight cover 6 on the rim 3, the latter has a shallow notch or depression 15 relative to the heat sealing plane between the rim 3 and the cover 6, this notch 15 being formed, preferably by thermoforming, in the rim 3 of the container 1 preferably during the forming of the latter (see Figures 1, 2 and 5 to 8).
  • the cover 6 is not sealed on the rim 3 at the location of the notch 15, but is sealed all around the latter, so as to define with said notch 15 a narrow grip cavity 16 open laterally on the superimposed edges of the rim 3 and of the cover 6.
  • the intermediate sheet 10 of the cover 6 has a breaking incision 17 which follows the periphery of the cavity 16 and which preferably is of triangular section, the base of which is covered with the internal sheet 9 and at least partially overlaps the bottom of the cavity 16.
  • the wall (external with respect to the periphery of the cavity 16) constitutes by one of these edges a tearing edge on which the inner sheet 9 of the cover 6 is torn (see FIGS. 5 to 8).
  • the access opening 14 which in itself is not the subject of the invention can be produced differently, and in particular in the manner indicated in FIGS. 3 to 6.
  • the access opening 14 is produced by cutting and eliminating a small plate in the intermediate sheet 10.
  • This access opening 14 is covered on one side by the external sheet 11 which remains substantially flat opposite that here, and on the other side, by the internal sheet 9 which penetrates into the opening 14 and adheres firmly over a large part of the cross section of this opening 14, on the underside of the external sheet 11.
  • the embodiment of the peel primer 7 as shown in FIGS. 3 and 4 preferably applies to a completely flat rim 3, but can also be used in combination with a rim 3 provided with a notch 15 ( see Figures 5 to 8).
  • the cover 6 and the cover strip 8 comprise, at the place where the peel leader 7 is to be located later, a cylindrical or frustoconical recess or the like 18 which is of small diameter and which extends over the entire thickness of the intermediate layer 10 and which will be located astride two contiguous edges of two neighboring containers 1 until the two containers 1 and the corresponding lids are cut out (see arrow D in FIG. 3) .
  • This recess 18 is covered, on the one hand, by the sheet or planar external layer 11 of the neighboring covers 6 or of the strip with covers 8 and, on the other hand, by the sheet or internal layer 9 which at the place of the recess 18 passes through it over a large part of the cross section of said recess 18 and adheres firmly to the underside of the sheet or outer layer 11.
  • a gripping cavity 16 is obtained which is open on the superimposed edges of the cover 6 and the rim 3 and delimited by, on the one hand, a part of the internal sheet 9 of the cover 6 and, on the other hand, part of the internal layer 4 of the rim 3, the bottom of this cavity 16 being constituted by the junction by heat sealing of the sheet 9 and the layer 4 and having a rim in the form of U open to the edges of the container 1 e t of the cover 6. It should be noted that one of the edges of the vertical wall delimiting the recess 18 of the intermediate sheet 10 constitutes a tear edge for the internal sheet 9 at the bottom of the gripping cavity 16.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Laminated Bodies (AREA)
EP90401842A 1989-06-28 1990-06-27 Récipient thermoplastique à ouverture par pelage partiel d'un couvercle multicouche thermosoudé sur le rebord de ce dernier et film couvercles multicouches Expired - Lifetime EP0406109B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8908643A FR2649071B1 (es) 1989-06-28 1989-06-28
FR8908643 1989-06-28

Publications (2)

Publication Number Publication Date
EP0406109A1 EP0406109A1 (fr) 1991-01-02
EP0406109B1 true EP0406109B1 (fr) 1993-12-08

Family

ID=9383227

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90401842A Expired - Lifetime EP0406109B1 (fr) 1989-06-28 1990-06-27 Récipient thermoplastique à ouverture par pelage partiel d'un couvercle multicouche thermosoudé sur le rebord de ce dernier et film couvercles multicouches

Country Status (7)

Country Link
US (1) US5125529A (es)
EP (1) EP0406109B1 (es)
JP (1) JPH04502299A (es)
DE (1) DE69005045T2 (es)
ES (1) ES2048994T3 (es)
FR (1) FR2649071B1 (es)
WO (1) WO1991000228A1 (es)

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US5004111A (en) * 1989-02-27 1991-04-02 Minnesota Mining & Manufacturing Company Internally delaminating tabbed innerseal for a container and method of applying

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FR2649071A1 (es) 1991-01-04
DE69005045T2 (de) 1994-07-21
EP0406109A1 (fr) 1991-01-02
JPH04502299A (ja) 1992-04-23
US5125529A (en) 1992-06-30
ES2048994T3 (es) 1994-04-01
FR2649071B1 (es) 1991-10-25
DE69005045D1 (de) 1994-01-20
WO1991000228A1 (fr) 1991-01-10

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