WO2001007330A1 - Bague de fermeture comportant une membrane de fermeture, et son procede de production - Google Patents

Bague de fermeture comportant une membrane de fermeture, et son procede de production Download PDF

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Publication number
WO2001007330A1
WO2001007330A1 PCT/EP2000/007039 EP0007039W WO0107330A1 WO 2001007330 A1 WO2001007330 A1 WO 2001007330A1 EP 0007039 W EP0007039 W EP 0007039W WO 0107330 A1 WO0107330 A1 WO 0107330A1
Authority
WO
WIPO (PCT)
Prior art keywords
coating
powder
locking ring
sealing
closure
Prior art date
Application number
PCT/EP2000/007039
Other languages
German (de)
English (en)
Inventor
Daniel Vetter
Jürg Frey
Original Assignee
Alcan Rorschach Ag
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 Alcan Rorschach Ag filed Critical Alcan Rorschach Ag
Priority to AU65656/00A priority Critical patent/AU6565600A/en
Publication of WO2001007330A1 publication Critical patent/WO2001007330A1/fr

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
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/50—Non-integral frangible members applied to, or inserted in, preformed openings, e.g. tearable strips or plastic plugs
    • B65D17/501—Flexible tape or foil-like material
    • B65D17/502—Flexible tape or foil-like material applied to the external part of the container wall only
    • 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
    • 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
    • B65D2517/5013—Details of flexible tape or foil-like material the tape covering almost the whole of the 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
    • B65D2517/50—Non-integral frangible members applied to, or inserted in, a preformed opening
    • B65D2517/504—Details of preformed openings
    • B65D2517/5056—Details of preformed openings the edge of the preformed opening having a covering element or coating, e.g. to prevent cutting or for sealing purposes
    • 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
    • B65D2517/5072—Details of hand grip, tear- or lift-tab
    • B65D2517/5083—Details of hand grip, tear- or lift-tab with means facilitating initial lifting of tape, e.g. lift or pull-tabs

Definitions

  • the invention relates to a method for producing a closure ring with a circumferential sealing surface for sealing a closure membrane and a border for applying the closure ring to the edge of the container, as well as a corresponding closure ring.
  • Containers made of sheet steel, aluminum, plastic or laminates made of paper and plastic are used for powdery, pasty or liquid contents. In order to ensure an airtight and / or liquid- or water vapor-tight seal, these must also be tightly sealed on the cover side for storage and transport, and yet be opened easily and without tools for consumption.
  • the varnish for the coating of the sheets must meet several conditions. In addition to excellent adhesion to the base made of raw metal, it meets the high requirements with regard to corrosion resistance and food suitability as well as sterilizability. Furthermore, and this is essential for the high demands of the consumer, he must allow the sealing membrane to be sealed on without it loosening during sterilization, but being easily removable from it to open the container. Coating with lacquer should be possible in one or more layers, the wet or powder lacquer used as coating material being able to change from layer to layer.
  • Closures of the type mentioned at the outset are known and shown, for example, from the "Alcan packaging material” catalog from ALCAN RORSCHACH AG, dated 5.96. These known closures are also manufactured, among other things, according to Swiss patent CH 674 829.
  • the object of the present invention is now to provide a method for producing such a locking ring, in which the lead frames and roundels can be reprocessed with little loss of value, and to provide a corresponding locking ring.
  • the necessary corrosion protection is applied after completion of the locking ring by coating with powder coating, which has the property of also protecting the cut edges properly.
  • the powder coating also has the property that the sealed sealing membrane can be peeled off the sealing ring.
  • FIG. 1 shows a top view of the flat annular disks punched out from strip-like or sheet-like uncoated material
  • FIG. 2 shows a top view of an individual annular disk before it is formed into a locking ring
  • Annular disks 4 are punched out of a sheet or of strip-shaped, uncoated material 1, for example pure aluminum sheet.
  • the washer 4 is deformed in a deep-drawing process.
  • the material used in its most cost-effective form is very easy to process.
  • the geometric shape of the border area 25 can also be designed differently than is shown schematically in FIG. 3.
  • the peripheral edge 27 can be slightly compressed.
  • the necessary sealing material 29 is also injected on the concave side of the flange area 25 for sealing with the container body.
  • the sealing of a closure membrane 31, which spans the center opening 15, takes place - as was previously the case with conventionally produced closure rings - before the closure rings are applied to a container.
  • a tendon-like section X on the center opening edge serves to form a sufficiently large sealing surface for the membrane 31, which is sealed onto the sealing area 9, also on the folded edge of a flap 32.
  • the tab 32 is part of the membrane 31 and is folded against the center of the latter. This creates a straight line in the fold area Section that runs parallel to section X, so that sealing is perfectly possible even with round containers.
  • rings / cans with a non-round cross-section because the placement of the torn-open tab 32 always comes to lie in an area with a small can radius.
  • the coating serving as corrosion protection is applied to the finished locking ring before the sealing compound is introduced into the concave part of the Bördeis 25.
  • the coating is carried out by powder coating, which is applied electrostatically and then melted.
  • a powder coating is preferably used.
  • the powder coating is preferably based on polyolefins, in particular polypropylene or polyethylene with polar functional groups.
  • the use of such lacquers enables sealable coatings to be produced with the required high adhesion to the metallic surface.
  • Acid or acid anhydride groups are modified as polar functional groups.
  • Stabilizing the paint with antioxidants prevents embrittlement of the paint layer due to oxidation processes, such as those caused by heat sterilization and long storage. Due to the surface-specific stabilization of the powder with antioxidants, a particularly high antioxidant concentration is achieved at the location of the lacquer, which is particularly sensitive to oxidation. This enables particularly effective stabilization.
  • the powder coating is then applied using conventional powder coating systems, e.g. electrostatic powder spray guns, applied to the locking ring.
  • conventional powder coating systems e.g. electrostatic powder spray guns
  • only the last lacquer layer is created with a powder lacquer stabilized with antioxidants.
  • a closure ring made of raw metal with a circumferential sealing surface for a sealable and peelable closure membrane is also provided, which is coated with such a lacquer based on polyolefins. Furthermore, the invention provides the use of such a lacquer for coating a corresponding locking ring. For example:
  • a suitable antioxidant e.g. IRGANOX B215 from Ciba Specialty Chemicals Inc., Basel
  • a suitable antioxidant e.g. IRGANOX B215 from Ciba Specialty Chemicals Inc., Basel
  • 200 g of a polypropylene powder grafted with maleic anhydride the resulting mass is ground in a mortar for five minutes. This mass is then dried in a rotary evaporator at 80 ° C. until the powder has a free-flowing and processable consistency.
  • the powder is then ready for application using conventional powder coating systems, e.g. electrostatic powder spray guns.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)

Abstract

Le procédé selon l'invention consiste à découper à la matrice, de manière annulaire, une tôle non revêtue puis à former une bague à section profilée, par une opération de formage. Avant ou après cette dernière opération, la bague de fermeture (4) est revêtue d'une peinture en poudre pouvant être stérilisée et scellée, avant l'application de la membrane de fermeture (31). L'invention concerne également une bague de fermeture en métal brut comprenant une surface de scellement périphérique destinée à une membrane de fermeture scellable et pelable, recouverte d'une peinture à base de polyoléfines.
PCT/EP2000/007039 1999-07-22 2000-07-21 Bague de fermeture comportant une membrane de fermeture, et son procede de production WO2001007330A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU65656/00A AU6565600A (en) 1999-07-22 2000-07-21 Sealing ring, comprising a sealing diaphragm and production of the same

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CH133999 1999-07-22
CH133799 1999-07-22
CH1339/99 1999-07-22
CH1337/99 1999-07-22

Publications (1)

Publication Number Publication Date
WO2001007330A1 true WO2001007330A1 (fr) 2001-02-01

Family

ID=25687386

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2000/007039 WO2001007330A1 (fr) 1999-07-22 2000-07-21 Bague de fermeture comportant une membrane de fermeture, et son procede de production

Country Status (2)

Country Link
AU (1) AU6565600A (fr)
WO (1) WO2001007330A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004101192A1 (fr) * 2003-05-13 2004-11-25 Elpatronic Ag Dispositif d'usinage et utilisation dudit dispositif pour la fabrication de couvercles avec opercule a dechirer
WO2005070662A1 (fr) * 2004-01-26 2005-08-04 Crown Packaging Technology Inc Méthode et appareil pour plier une languette sur un couvercle
WO2006029991A1 (fr) * 2004-09-13 2006-03-23 Crown Packaging Technology, Inc Dispositif de pliage et de fixation de languette, et procede
EP3279105A1 (fr) 2016-08-02 2018-02-07 Amcor Flexibles Singen GmbH Bague de couvercle

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4270665A (en) * 1979-06-22 1981-06-02 Toyo Seikan Kaisha, Ltd. Peelable adhesive structure and method for its manufacture
CH674829A5 (fr) * 1987-12-14 1990-07-31 Alcan Rorschach Ag
EP0408268A2 (fr) * 1989-07-10 1991-01-16 CarnaudMetalbox plc Procédé et appareil pour la fabrication d'un anneau d'une fermeture pour un récipient

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4270665A (en) * 1979-06-22 1981-06-02 Toyo Seikan Kaisha, Ltd. Peelable adhesive structure and method for its manufacture
CH674829A5 (fr) * 1987-12-14 1990-07-31 Alcan Rorschach Ag
EP0408268A2 (fr) * 1989-07-10 1991-01-16 CarnaudMetalbox plc Procédé et appareil pour la fabrication d'un anneau d'une fermeture pour un récipient

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004101192A1 (fr) * 2003-05-13 2004-11-25 Elpatronic Ag Dispositif d'usinage et utilisation dudit dispositif pour la fabrication de couvercles avec opercule a dechirer
US7975362B2 (en) 2003-05-13 2011-07-12 Soundronic Ag Processing device and use thereof for the production of covers with a film which can be torn off
WO2005070662A1 (fr) * 2004-01-26 2005-08-04 Crown Packaging Technology Inc Méthode et appareil pour plier une languette sur un couvercle
WO2006029991A1 (fr) * 2004-09-13 2006-03-23 Crown Packaging Technology, Inc Dispositif de pliage et de fixation de languette, et procede
US7588525B2 (en) 2004-09-13 2009-09-15 Crown Packaging Technology, Inc. Tab folding and sealing apparatus and method
EP3279105A1 (fr) 2016-08-02 2018-02-07 Amcor Flexibles Singen GmbH Bague de couvercle
WO2018024376A1 (fr) 2016-08-02 2018-02-08 Amcor Flexibles Singen Gmbh Joint de couvercle

Also Published As

Publication number Publication date
AU6565600A (en) 2001-02-13

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