EP4228976B1 - Couvercle de boîte et procédé de fabrication d'un couvercle de boîte - Google Patents

Couvercle de boîte et procédé de fabrication d'un couvercle de boîte Download PDF

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Publication number
EP4228976B1
EP4228976B1 EP21801512.1A EP21801512A EP4228976B1 EP 4228976 B1 EP4228976 B1 EP 4228976B1 EP 21801512 A EP21801512 A EP 21801512A EP 4228976 B1 EP4228976 B1 EP 4228976B1
Authority
EP
European Patent Office
Prior art keywords
lid
closure piece
opening
margin
lid surface
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.)
Active
Application number
EP21801512.1A
Other languages
German (de)
English (en)
Other versions
EP4228976C0 (fr
EP4228976A1 (fr
Inventor
Gregor Anton Piech
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.)
Top Cap Holding GmbH
Original Assignee
Top Cap Holding GmbH
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 Top Cap Holding GmbH filed Critical Top Cap Holding GmbH
Priority to MA61921A priority Critical patent/MA61921B1/fr
Priority to RS20241033A priority patent/RS65964B1/sr
Priority to HRP20241238TT priority patent/HRP20241238T1/hr
Publication of EP4228976A1 publication Critical patent/EP4228976A1/fr
Application granted granted Critical
Publication of EP4228976B1 publication Critical patent/EP4228976B1/fr
Publication of EP4228976C0 publication Critical patent/EP4228976C0/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/28—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness
    • B65D17/401—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall
    • B65D17/4012—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall for opening partially by means of a tearing tab
    • B65D17/4014—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall for opening partially by means of a tearing tab and provided with attached means for reclosing or resealing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
    • B21D51/44—Making closures, e.g. caps
    • B21D51/443—Making closures, e.g. caps easily removable closures, e.g. by means of tear strips
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
    • B21D51/44—Making closures, e.g. caps
    • B21D51/46—Placing sealings or sealing material
    • 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
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • 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
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/0001—Details
    • B65D2517/0002—Location of opening
    • 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
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/0001—Details
    • B65D2517/0031—Reclosable openings
    • B65D2517/0038—Reclosable openings the plug being reinsertable into the opening
    • 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
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/0001—Details
    • B65D2517/0058—Other details of container end panel
    • 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
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/0001—Details
    • B65D2517/0058—Other details of container end panel
    • B65D2517/008—Materials of container end panel
    • B65D2517/0082—Coated or laminated metal
    • 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
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/50—Non-integral frangible members applied to, or inserted in, a preformed opening
    • B65D2517/5002—Details of flexible tape or foil-like material
    • B65D2517/5008—Details of flexible tape or foil-like material with a sealing coat
    • 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
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/50—Non-integral frangible members applied to, or inserted in, a preformed opening
    • B65D2517/504—Details of preformed openings
    • B65D2517/5062—Details of preformed openings the edge of the preformed opening being provided with incisions or notches for facilitating removal

Definitions

  • the invention relates to a can lid, in particular for beverage cans, with a metallic lid surface in which an opening is formed which is delimited by a closed edge of the lid surface and which is closed by a closure piece of the metallic lid surface, wherein the closure piece is separated from the surrounding lid surface by a micro-gap which extends at least in sections along the edge of the lid surface, wherein an edge of the closure piece and the edge of the surrounding lid surface adjoin one another at the micro-gap, and wherein the closure piece can be moved out of the plane defined by the opening to release the opening, and with a layer of a plastic material which is applied to a flat side of the metallic lid surface so as to cover the micro-gap.
  • Can lids of this type are used extensively in the manufacture of beverage cans, food cans and the like. They are simple and inexpensive to manufacture, enable space-saving stacking of similar cans and can be easily opened and closed again if necessary by manually moving the closure piece. Due to the micro-gap, no metal particles that could be hazardous to health enter the interior of the can when the can is opened. The tightness of the can lid is ensured by the layer covering the micro-gap, despite the lack of a continuous metal connection between the closure piece and the surrounding lid surface.
  • the layer of plastic material tears in the area of the micro-gap, so that the opening is subsequently free.
  • the layer may stretch and unravel in an undefined manner, for example causing fraying. This is undesirable, particularly because it increases the amount of force required to open the can and may prevent the can contents from escaping through the opening.
  • the optical appearance of the opening is also negatively affected.
  • the invention provides that the edge of the closure piece and the edge of the surrounding lid surface are offset from one another transversely to the plane defined by the opening.
  • one of the adjacent edges protrudes from the other and, when the edges move apart as a result of the opening process, forms a cutting edge that moves through the layer and ensures that the layer is separated reliably and in a defined manner.
  • the layer is therefore sheared rather than torn.
  • the layer of plastic material can be a film or a film-like layer that is connected to the metallic cover surface, for example adhesively.
  • a film of plastic material can be connected to the metallic cover surface by means of lamination.
  • the layer can also be a film laminated onto the metallic cover surface. In principle, the layer could also be created by applying a liquid plastic material and then curing it.
  • the micro-gap can be a punched gap, whereby the adjacent edges can touch each other at least in some areas.
  • the plane defined by the opening can coincide with the surface extension of the lid surface or the closure piece.
  • the offset arrangement of the edge of the closure piece and the edge of the surrounding lid surface can create a step with a square or angular cross-section in the lid surface. Such a step develops a particularly pronounced notch effect that supports the cutting through of the plastic coating.
  • edge of the closure piece and the edge of the surrounding lid surface are offset from each other by a height offset of 0.01 mm to 0.3 mm, preferably from 0.05 mm to 0.12 mm.
  • the edge of the closure piece and the edge of the surrounding lid surface can also be offset from one another by a height offset that is at least 10% and at most 90%, preferably at least 25% and at most 70%, of the thickness of the metal lid surface.
  • a height offset that is at least 10% and at most 90%, preferably at least 25% and at most 70%, of the thickness of the metal lid surface.
  • the edge of the closure piece is offset in the opening direction relative to the edge of the surrounding lid surface. This ensures that the cutting effect starts immediately when the can is opened and not a certain distance must be bridged without cutting. If the layer is applied to the flat side of the lid surface that is at the back in relation to the opening direction, the edge of the surrounding lid surface that protrudes to the rear acts as a cutting edge. If, however, the layer is applied to the flat side of the lid surface that is at the front in relation to the opening direction, the edge of the closure piece that protrudes to the front acts as a cutting edge.
  • micro-gap has a maximum width of 0.02 mm and/or that the closure piece is held in the surrounding lid surface by clamping. This has proven to be particularly advantageous in practice.
  • the layer is applied to an inner side of the metallic lid surface.
  • the layer is therefore preferably located on the side of the lid facing the inside of the can. In general, this is the underside of the metallic lid surface.
  • the layer can be applied over the entire flat side of the metal lid surface. This is advantageous in terms of production technology and ensures a particularly high sealing effect.
  • the layer can be made as a film and/or applied firmly to the metal lid surface, for example sealed.
  • the plastic material can be food-grade polypropylene.
  • the layer has a weakening, in particular a notch or at least a partial notch, which is arranged at a distance from the micro-gap.
  • the weakening reduces the amount of force required to open the can. Due to the distance between the weakening and the micro-gap, a high level of tightness is ensured - even in the event that the weakening is a partial or complete In particular, in the case of a partial or complete notch, it is advantageous if the composite of the metal and the plastic material is of particularly high quality without any significant defects.
  • a handle, pull and/or lever element for lifting or pivoting the closure piece is attached to the closure piece.
  • a user can actuate the handle, pull and/or lever element to press in, lift or pivot the closure piece.
  • a two-armed lever element made of a plastic material can be provided, which is firmly connected to the metal lid surface.
  • the handle, pull and/or lever element has an annular grip section such as a ring tab.
  • a ring tab is particularly advantageous because it can be easily grasped and allows the respective can to be opened using a convenient pulling movement.
  • a special embodiment of the invention provides that a sealing frame made of plastic material enclosing the opening is connected to the surrounding lid surface and a closing unit made of plastic material carrying the closure piece is pivotably attached to the surrounding lid surface, wherein the sealing frame and the closing unit can be releasably connected to one another in a fluid-tight manner via sealing and locking ribs and associated receiving grooves.
  • a can lid has a resealable opening.
  • the sealing and locking ribs and the receiving grooves are designed in such a way that complete reclosure by the snap-lock connection can be felt and possibly perceived acoustically.
  • the invention also relates to a method for producing a can lid, in particular a can lid for beverage cans, preferably a can lid as described above, wherein an at least partially flat Metal element is provided, a closure piece is punched out of the metal element and reinserted into the opening formed by the punching process, and wherein a layer of a plastic material is applied to a flat side of the metal element such that the dividing line between the punched-out closure piece and the opening is covered by the layer.
  • a predetermined height offset is generated between an edge of the closure piece and an adjacent edge of the opening in a direction transverse to the plane defined by the opening.
  • one of the adjacent edges forms a cutting edge that moves through the layer when the can is opened and, via a notch effect, ensures reliable and defined separation of the layer.
  • the adjacent edges are also offset during punching because the closure piece is initially pressed out of the metal element.
  • this is a short-term transitional state that inevitably occurs due to the punching process.
  • the invention provides for a targeted positioning of the adjacent edges in order to create a permanent height offset until the can is opened for the first time.
  • the closure piece is preferably moved incompletely back into the opening. This is advantageous from a process engineering perspective.
  • the height offset is adjusted and/or fixed in a calibration unit after the incomplete return movement.
  • the relevant edges can be positioned relative to one another with high precision.
  • the layer is applied to the flat side of the metal element after the height offset has been created while maintaining the same. This prevents damage to the layer by the device used to create the height offset.
  • the Fig.1 and 2 show a can lid 11 intended in particular for a beverage can, in whose metallic lid surface 13 a reclosable opening system 15 is integrated.
  • the can lid 11 can be connected to an associated container (not shown) via a flanged edge 12.
  • an opening is provided in the metallic lid surface 13, which in the Fig.1 and 2 shown delivery state of the can lid 11 is closed by a section of the metallic lid surface 13 in the form of a closure piece 19.
  • the closure piece 19 is separated from the surrounding cover surface 23 by a micro-gap 21.
  • the outer edge 25 of the closure piece 19 and the inner edge 27 of the surrounding cover surface 23 adjoin one another.
  • the metallic cover surface 13 is preferably formed from a sheet metal layer made of aluminum or tinplate. It has an outer flat side 29 and an inner flat side 30, with a layer 33 made of plastic material being applied to the inner flat side 30 in such a way that it covers the micro gap 21.
  • an adhesive layer (not visible in the figures) can be provided.
  • the layer 33 is applied over the entire surface of the inner flat side 30 of the metallic cover surface 13. In certain applications, it may also be sufficient to provide a layer 33 only in the vicinity of the micro gap 21.
  • the layer 33 can be a plastic film, for example made of polypropylene.
  • a notch 35 may be formed which extends along the micro-gap 21 at a predetermined distance from the latter.
  • the can lid 11 By moving the closure piece 19 out of the plane 37 defined by the opening ( Fig. 2 ), the can lid 11 can be opened. Since there is no material connection between the closure piece 19 and the surrounding lid surface 23 in the area of the micro-gap 21, no metal separation is required when a can provided with the can lid 11 according to the invention is opened for the first time, so that the otherwise unavoidable formation of metallic microparticles is excluded. This avoidance of the formation of microparticles during the opening process, in particular microparticles made of aluminum, is important from a health perspective, because such microparticles inevitably also get into the product contained in the respective can and thus also into the human body.
  • the layer 33 reliably seals the micro-gap 21.
  • the notch 35 which can have a uniform depth or possibly also locally different depths, ensures that only a comparatively small amount of force is required to open the can lid 11.
  • the distance between the micro-gap 21 and the notch 35 which is preferably about 0.2 to 0.5 millimeters, improves the sealing effect.
  • the resealable opening system 15 ( Fig. 1-3 ) comprises a sealing frame 39 made of plastic material which surrounds the opening and is firmly connected to the surrounding cover surface 23. Furthermore, a closing unit 40 made of plastic material is provided which carries the closure piece 19 and is pivotably attached to the surrounding cover surface 23.
  • a locking device 41 ( Fig.3 ), which is formed by sealing and locking ribs 43 and associated receiving grooves 45, is a detachable fluid-tight connection between the sealing frame 39 and the closing unit 40. Accordingly, the can lid 11 is reclosable.
  • a ring-shaped tear-open member 47 preferably also made of plastic, is connected to the closing unit 40 or molded directly onto it and accordingly attached to the closure piece 19.
  • a user can pivot the closure piece 19 upwards out of the plane 37 defined by the opening and thus release the opening by separating the layer 33.
  • a pivot bearing 48 Diametrically opposite the tear-open member 47, a pivot bearing 48 ( Fig.1 ) which is firmly connected to the surrounding cover surface 23.
  • the outer edge 25 of the closure piece 19 and the inner edge 27 of the surrounding lid surface 23 are offset from one another in the delivery state of the can lid 11 transversely to the plane 37 defined by the opening.
  • the corresponding height offset can be 0.01 mm to 1 mm and/or at least 10% and at most 90% of the thickness of the metallic lid surface 13.
  • the outer edge 25 of the closure piece 19 is in the illustrated variant in the opening direction 50, i.e. in Fig.3 and 4 upwards. Due to the offset, a step 51 or edge is formed in the plastic material of the layer 33 on the inner flat side 30 of the metallic cover surface 13.
  • the described height offset is also advantageous for non-resealable can lids without a sealing frame and closing unit, i.e. for standard can lids, as well as for can lids with a closure piece 19 that can be pivoted inwards.
  • a flat metal element for example a sheet metal layer made of aluminum or tinplate, is provided and fed to an embossing device in which the flanged edge 12 or parts thereof as well as grooves, reinforcing beads and the like are formed in the flat metal element.
  • the embossed metal element is fed to a punching device in which the closure piece 19 is punched out of the metal element and reinserted into the opening formed by the punching process.
  • the punched-out closure piece 19 is pressed directly back into the sheet metal layer by spring force during the return stroke of the punch and is held there in a force-locking manner.
  • the closure piece 19 is, however, incompletely moved back into the opening.
  • the metal element is then fed to a calibration device in which the height offset is adjusted and/or fixed after the incomplete return movement. Only then is the inner flat side 30 provided with the layer 33, the application of the layer being carried out in such a way that the height offset is maintained.
  • the embossing device, the punching device and the calibration device can be integrated into a progressive tool, if necessary together with other machining devices.
  • Fig.5 shows a tool 55 of a calibration device which is suitable for adjusting the height offset.
  • An arrangement of punch 57 and die 59 defines a predetermined height difference 60.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
  • Closures For Containers (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Claims (15)

  1. Couvercle de boîte (11), en particulier pour des canettes de boissons, comprenant une surface de couvercle (13) métallique dans laquelle est formée une ouverture qui est délimitée par un bord fermé de la surface de couvercle (13) et qui est fermée par une pièce d'obturation (19) de la surface de couvercle (13) métallique,
    dans lequel
    la pièce d'obturation (19) est séparée de la surface de couvercle (23) environnante par une micro-fente (21) s'étendant au moins localement le long du bord (27) de la surface de couvercle (13),
    un bord (25) de la pièce d'obturation (19) et le bord (27) de la surface de couvercle (23) environnante sont mutuellement adjacents au niveau de la micro-fente (21), et
    la pièce d'obturation (19) peut être déplacée hors du plan (37) défini par l'ouverture, afin de libérer l'ouverture, et
    comprenant une couche (33) en une matière plastique qui est appliquée sur une face plate (30) de la surface de couvercle (13) métallique en recouvrant la micro-fente (21),
    caractérisé en ce que
    le bord (25) de la pièce d'obturation (19) et le bord (27) de la surface de couvercle (23) environnante sont décalés l'un par rapport à l'autre transversalement au plan (37) défini par l'ouverture.
  2. Couvercle de boîte selon la revendication 1,
    caractérisé en ce que
    la disposition décalée du bord (25) de la pièce d'obturation (19) et du bord (27) de la surface de couvercle (23) environnante forme un gradin (51), ayant une section transversale angulaire ou anguleuse, dans la surface de couvercle (13).
  3. Couvercle de boîte selon la revendication 1 ou 2,
    caractérisé en ce que
    le bord (25) de la pièce d'obturation (19) et le bord (27) de la surface de couvercle (23) environnante sont décalés l'un par rapport à l'autre d'un décalage en hauteur de 0,01 mm à 0,3 mm, de préférence de 0,05 mm à 0,12 mm.
  4. Couvercle de boîte selon l'une des revendications précédentes,
    caractérisé en ce que
    le bord (25) de la pièce d'obturation (19) et le bord (27) de la surface de couvercle (23) environnante sont décalés l'un par rapport à l'autre d'un décalage en hauteur qui représente 10 % au minimum et 90 % au maximum, de préférence 25 % au minimum et 70 % au maximum, de l'épaisseur de la surface de couvercle (13) métallique.
  5. Couvercle de boîte selon l'une des revendications précédentes,
    caractérisé en ce que
    le bord (25) de la pièce d'obturation (19) est décalé dans la direction d'ouverture (50) par rapport au bord (27) de la surface de couvercle (23) environnante.
  6. Couvercle de boîte selon l'une des revendications précédentes,
    caractérisé en ce que
    la micro-fente (21) présente une largeur maximale de 0,02 mm, et/ou en ce que la pièce d'obturation (19) est maintenue par serrage dans la surface de couvercle (23) environnante.
  7. Couvercle de boîte selon l'une des revendications précédentes,
    caractérisé en ce que
    la couche (33) est appliquée sur une face intérieure de la surface de couvercle (13) métallique.
  8. Couvercle de boîte selon l'une des revendications précédentes,
    caractérisé en ce que la couche (33) est appliquée sur toute la surface de la face plate (30) de la surface de couvercle (13) métallique.
  9. Couvercle de boîte selon l'une des revendications précédentes,
    caractérisé en ce que
    la couche (33) présente un affaiblissement (35), en particulier une encoche ou une entaille au moins partiellement traversante, qui est disposée à une certaine distance de la micro-fente (21).
  10. Couvercle de boîte selon l'une des revendications précédentes,
    caractérisé en ce que
    un élément de poignée, de traction et/ou de levier (47) est fixé à la pièce d'obturation (19) pour soulever ou faire pivoter la pièce d'obturation (19).
  11. Couvercle de boîte selon l'une des revendications précédentes,
    caractérisé en ce que
    un cadre d'étanchéité (39) en matière plastique entourant l'ouverture est relié à la surface de couvercle (23) environnante, et une unité d'obturation (40) en matière plastique portant la pièce d'obturation (19) est montée pivotante sur la surface de couvercle (23) environnante, le cadre d'étanchéité (39) et l'unité d'obturation (40) pouvant être reliés l'un à l'autre de manière amovible et étanche aux fluides par des nervures d'étanchéité et d'encliquetage (43) et par des rainures de réception (45) associées.
  12. Procédé de fabrication d'un couvercle de boîte (11), en particulier d'un couvercle de boîte pour des cannettes de boissons, de préférence d'un couvercle de boîte selon l'une des revendications précédentes, consistant à fournir un élément métallique au moins partiellement plat,
    découper une pièce d'obturation (19) dans l'élément métallique et la réinsérer dans l'ouverture formée par l'opération de découpage, et
    appliquer une couche (33) en matière plastique sur une face plate (30) de l'élément métallique, de telle sorte que la ligne de séparation entre la pièce d'obturation (19) découpée et l'ouverture est recouverte par ladite couche (33),
    caractérisé en ce que
    pendant ou après l'insertion de la pièce d'obturation (19) dans l'ouverture, un décalage en hauteur prédéfini est créé entre un bord (25) de la pièce d'obturation (19) et un bord adjacent (27) de l'ouverture dans une direction orientée transversalement au plan (37) défini par l'ouverture.
  13. Procédé selon la revendication 12,
    caractérisé en ce que
    pour créer le décalage en hauteur, la pièce d'obturation (19) est retournée incomplètement dans l'ouverture.
  14. Procédé selon la revendication 13,
    caractérisé en ce que
    le décalage en hauteur est réglé et/ou fixé dans une unité de calibrage après le retour incomplet.
  15. Procédé selon l'une des revendications 12 à 14,
    caractérisé en ce que
    l'application de la couche (33) sur la face plate (30) de l'élément métallique est réalisée après la création du décalage en hauteur, tout en conservant ledit décalage.
EP21801512.1A 2020-10-29 2021-10-27 Couvercle de boîte et procédé de fabrication d'un couvercle de boîte Active EP4228976B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
MA61921A MA61921B1 (fr) 2020-10-29 2021-10-27 Couvercle de boîte et procédé de fabrication d'un couvercle de boîte
RS20241033A RS65964B1 (sr) 2020-10-29 2021-10-27 Poklopac za limenke i postupak za proizvodnju poklopca za limenke
HRP20241238TT HRP20241238T1 (hr) 2020-10-29 2021-10-27 Poklopac za limenke i postupak za proizvodnju poklopca za limenke

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020128491.8A DE102020128491A1 (de) 2020-10-29 2020-10-29 Dosendeckel und Verfahren zum Herstellen eines Dosendeckels
PCT/EP2021/079824 WO2022090310A1 (fr) 2020-10-29 2021-10-27 Couvercle de boîte et procédé de production d'un couvercle de boîte

Publications (3)

Publication Number Publication Date
EP4228976A1 EP4228976A1 (fr) 2023-08-23
EP4228976B1 true EP4228976B1 (fr) 2024-06-26
EP4228976C0 EP4228976C0 (fr) 2024-06-26

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Country Status (22)

Country Link
US (1) US12319467B2 (fr)
EP (1) EP4228976B1 (fr)
JP (1) JP7577383B2 (fr)
KR (1) KR20230118800A (fr)
CN (1) CN116368072B (fr)
AR (1) AR123920A1 (fr)
AU (1) AU2021372729B2 (fr)
CA (1) CA3196626A1 (fr)
DE (1) DE102020128491A1 (fr)
ES (1) ES2984083T3 (fr)
HR (1) HRP20241238T1 (fr)
HU (1) HUE068420T2 (fr)
MA (1) MA61921B1 (fr)
MX (1) MX2023004906A (fr)
PE (1) PE20231141A1 (fr)
PL (1) PL4228976T3 (fr)
PY (1) PY2194267A (fr)
RS (1) RS65964B1 (fr)
TW (1) TWI805044B (fr)
UY (1) UY39485A (fr)
WO (1) WO2022090310A1 (fr)
ZA (1) ZA202303739B (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022129193A1 (de) * 2022-11-04 2024-05-08 Top Cap Holding Gmbh Dosendeckel
DE102022129183A1 (de) * 2022-11-04 2024-05-08 Top Cap Holding Gmbh Dosendeckel
AU2023348037B2 (en) * 2022-11-04 2026-01-22 Top Cap Holding Gmbh Can lid
DE102023109425A1 (de) * 2023-04-14 2024-10-17 Top Cap Holding Gmbh Dosendeckel

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BR7106052D0 (pt) 1970-09-16 1973-04-26 Broken Hill Pty Co Ltd Fecho de facil abertura
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JP3043193B2 (ja) 1992-12-24 2000-05-22 新日本製鐵株式会社 開缶性、耐食性、フェザー性に優れた易開缶性蓋用ラミネート鋼板
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US20180339819A1 (en) * 2017-05-25 2018-11-29 R. Peter Stodd Reclosable lid for a food or beverage container and having a vacuum or pressure release button
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EP3741701B1 (fr) 2018-06-19 2022-12-14 Top Cap Holding GmbH Procédé de fabrication d'un couvercle de boîte métallique

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Publication number Publication date
AU2021372729A1 (en) 2023-04-27
EP4228976C0 (fr) 2024-06-26
CN116368072A (zh) 2023-06-30
JP2023547486A (ja) 2023-11-10
JP7577383B2 (ja) 2024-11-05
UY39485A (es) 2022-04-29
WO2022090310A1 (fr) 2022-05-05
CN116368072B (zh) 2024-09-27
EP4228976A1 (fr) 2023-08-23
PY2194267A (es) 2022-05-30
AR123920A1 (es) 2023-01-25
US20230331435A1 (en) 2023-10-19
HRP20241238T1 (hr) 2024-12-06
AU2021372729B2 (en) 2024-05-02
MX2023004906A (es) 2023-05-15
RS65964B1 (sr) 2024-10-31
ZA202303739B (en) 2024-10-30
DE102020128491A1 (de) 2022-05-05
PE20231141A1 (es) 2023-07-21
PL4228976T3 (pl) 2024-11-04
MA61921B1 (fr) 2024-06-28
TW202231544A (zh) 2022-08-16
CA3196626A1 (fr) 2022-05-05
TWI805044B (zh) 2023-06-11
AU2021372729A9 (en) 2024-10-24
KR20230118800A (ko) 2023-08-14
ES2984083T3 (es) 2024-10-28
US12319467B2 (en) 2025-06-03
HUE068420T2 (hu) 2024-12-28

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