EP2055641A1 - Bague de couvercle pouvant fléchir et procédé permettant de former un couvercle - Google Patents

Bague de couvercle pouvant fléchir et procédé permettant de former un couvercle Download PDF

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Publication number
EP2055641A1
EP2055641A1 EP07119557A EP07119557A EP2055641A1 EP 2055641 A1 EP2055641 A1 EP 2055641A1 EP 07119557 A EP07119557 A EP 07119557A EP 07119557 A EP07119557 A EP 07119557A EP 2055641 A1 EP2055641 A1 EP 2055641A1
Authority
EP
European Patent Office
Prior art keywords
ring
lid
foil
sealed
panel
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.)
Withdrawn
Application number
EP07119557A
Other languages
German (de)
English (en)
Inventor
Jean-Francois Jouillat
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.)
Trivium Packaging West France SAS
Original Assignee
Impress Metal Packaging SA
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 Impress Metal Packaging SA filed Critical Impress Metal Packaging SA
Priority to EP07119557A priority Critical patent/EP2055641A1/fr
Publication of EP2055641A1 publication Critical patent/EP2055641A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • 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
    • B65D79/00—Kinds or details of packages, not otherwise provided for
    • B65D79/005—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting
    • B65D79/0087—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting the deformable part being located in a closure, e.g. in caps or lids
    • 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
    • B65D2517/5043—Details of preformed openings provided with a flange
    • B65D2517/5051—Up-turned flange, i.e. extending away from container
    • B65D2517/5054—Up-turned flange, i.e. extending away from container rolled or folded back, e.g. to avoid sharp edges
    • 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
    • B65D2517/504—Details of preformed openings
    • B65D2517/507—Unusual details
    • 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 concerns a method for preparing or using or forming a lid.
  • the lid or lid ring is concerned as well.
  • the lid comprises a lid ring (Deckelring) and a lid foil (membrane), which work together and are coupled together by a sealing portion which seals in ring-like fashion the membrane as panel to a flange of the preferably metallic ring.
  • the metallic ring is outside formed to have a seaming edge (seamable outer portion) which is provided and shaped to be seamed by a multiple seam to a body flange of a body wall to cover the body with the ring and the foil, in other words to cover the body with the lid.
  • Lid rings of metallic nature and lid foils of metallic, plastic or a combinatorial nature are known in several sorts and shapes.
  • the flat ring flange onto which the foil is sealed (where the lid foil is sealed) has several different orientations. It can be horizontally oriented, it can be tilted upwards, and it can also be tilted downwards. It can even change its shape during sterilization of a closed container, where inner pressure supplies force in axial direction to act on the foil, transferred to the sealing portion and to the panel (ring flange). Different orientations can therefore be present, as well as different orientations can be selected for the foil covering the inner opening, which it covers before, during and/or after a sterilization process, cf.
  • WO-A 2007/088212 (Impress), WO-A 2005/005277 (Crown), and WO-A 2007/45385 (Alcan). All these variants operate with foils that have different shapes during a sterilization process.
  • the sterilization process provides high pressure and high temperature to make the food inside the container stable for longer storage and transport, and during this sterilization of up to 130°C, a pressure has to be resisted by the lid.
  • the lid After such sterilization process, the lid has a task to provide long-time shelf- or self-life, until a user wishes to open this lid. At this very time instant, the opening forces have to be very low, as contrary to those forces the lid and the foil have to withstand during sterilization processes. Not all processes in sterilizing do have counter-pressure, as many processes operate with continuous retort systems.
  • a lid ring for closure said ring having a first and second attaching portion as a radially outer and a radially inner portion and an intermediate linking portion, connecting first and second portion.
  • the first portion has a ring surface adapted to carry a sealed foil or panel, said foil having an outer ring band for sealing on the ring surface.
  • the outer portion is adapted to be seamed to an edge of a container body.
  • the linking portion provided and configured as a circumferential hinge, whereby the first and second portions being tiltable relative to each other upon pressure applied to the sealed foil as panel, sealed on the ring surface of the first portion.
  • a change of slope (inclination) of the first portion of the ring occurs during retorting, or during reforming after retort or during use of the lid ring with the foil as panel sealed thereto.
  • the lid ring with the sealed foil is the lid for closure (claim 14).
  • the intermediate portion is provided with a circumferential score line, for allowing the slope change of the first portion under pressure.
  • the slope change being a free forming under surface pressure onto the foil.
  • the lid ring's flat panel has a slope change between (or within) ⁇ 30°, more preferably ⁇ 26°, or ⁇ 20°.
  • the slope change can also be positive only, between 0° to 20°.
  • the slope of the lid ring flat panel (radial inner portion) of the first portion preferably changes upwards during retorting. Then the slope changes downwards after retorting.
  • the slope change being a free forming under surface pressure onto the foil.
  • the lid ring's first portion is forcibly bent downwards, to allow easier tearing-off ("peeling") of the foil as panel from the first portion of the lid ring.
  • the pressure applied to the sealed foil is either outer or inner pressure, acting from above or below, respectively.
  • the slope change is preferably taking place in all three time instances: retorting, reforming, use.
  • the slope change during retorting and reforming is a free forming under surface pressure onto the foil.
  • the lid having a lid ring extending radially outside in a curl shape adapted to be seamed to a body flange of a container body, and extending radially inside in a substantially flat flange, adapted to be sealed and sealed with an edge ring of a central foil, covering an inner opening of the lid ring, radially inside of the inner end of the flat flange.
  • this is a method of operating a lid (lid ring and foil), when retorting and/or cooling thereafter (claim 13).
  • the central foil has a tab extending from a radially outer end, preferably folded radially inside, and lying substantially parallel and close to an upper surface of the central foil.
  • the inner portion of the lid ring as flat flange is flexing axially upward during a retorting, and returning at least in part during cooling after retorting.
  • the initial position of the flange is angled downwards in the method.
  • the slope change being a free forming under surface pressure onto the foil.
  • the tab should be closely lying with the membrane (foil). During all the process(es) on/in the fillers production line, it should not rise up, but stay as close as possible with and along the foil, considering the length of the tab that is near the panel of the lid ring, where the foil is sealed. Still, the tab should provide a grip portion that can be gripped by an end user when wishing to open the lid, far beyond in time after the sterilization process. The grip portion can not be lying parallel and very close to the foil; it must rise up or bend away from the foil, as having this shape after sterilization and during transport and storage as well as shelf life. This appears to be a contradictory problem, even more emphasized when thin foils are more commonly used in the future, and the tab that is provided with a strip made from the same material as the foil, has no own rigidity to actively keep the position that it has been placed to.
  • the lid ring 2 has an intermediate linking portion 2c that connects outer and inner portion 2a, 2b.
  • a score line 30 is suitably placed to allow the two portions 2a, 2b to flex or tilt against each other. This acts as circumferential hinge of the lid ring.
  • FIG. 1 as view shows some of the elements used in the embodiments of the invention.
  • the inner opening 20 is closed by the covering foil 3.
  • the lid ring 2 preferably made from metal, but could as well be stiff plastic, has an outer curl 2a that is shown in section in sketch 2 ( figure 2 ) . This curl is suitable to be seamed to a body flange not shown here, but common in the technical field.
  • Ring zone 9 as sealing provides a liquid tight seal of the foil 3 in its outer end ring 3b with respect to the lid ring 2 and its flange or flat ring panel 2b.
  • the shape of the lid ring is in this embodiment round, it can have oblong, square and elongated shape as well.
  • An inner end 2c of the flat ring panel of the lid ring can have many shapes, an open curl, a closed curl, a flattened end of dual material layer (folded in or folded out), and a non-treated cut end. Preferred are closed curls or free cut ends that are covered by the overlying central foil. It defines the inner opening 20 closed by the foil 3 as panel.
  • the shape of the central foil 3 can also have many shapes in two aspects. Its basic shape depends on the shape of the lid ring 2 as explained in the previous paragraph. Its vertical shape depends on the orientation of the flat ring panel 2b, and whether this is directed horizontally, slanted upwards or slanted downwards.
  • the central portion 3c of the panel 3 therefore is either flat, domed downwards or domed upwards. It can change its shape due to pressure exerted from the inside of the filled container during sterilization, changing the surface 3" in its shape and taking with this change of shape of a tab that is oriented parallel or along the surface 3" of the foil, to grip the tab 3d for tearing open the foil from the lid ring.
  • the ring surface 9 is adapted to seal the foil for providing a lid panel.
  • the foil has an outer ring band to be sealed in a liquid-tight manner to the panel 2b.
  • the hinge is allowing to move the sealed ring zone relative to the outer portion 2a. This is affected by the force F 1 which is applied to the foil 3 by inner and/or outer pressure.
  • the pressure source can be ambient pressure (at inner vacuum) or inner pressure at a sterilizing status, acting outward.
  • the shape of the center foil portion 3c can vary:
  • the initial and the end position of the flange 2b of the lid ring vary in several embodiments.
  • That center foil 3c can have flat, upward domed, downward domed shape.
  • a combination of at least any two of the three varieties is preferred.
  • the angle is between + 30° to - 30°, or can be between 0° and 30°. Lower values of these angles are preferred, cf. claim 2.
  • a tab 3d can be fastened, or folded over from the outer end of the foil 3.
  • the tab is lying parallel to the foil, close to its surface 3". This is separately displayed in Fig. 3a .
  • the retorting is done at up to 130 °C, preferably in a continuous retort station with no substantial counterpressure, providing sterilization to the content of the container that is closed by said lid.
  • the slope change is preferably an upward change during retorting, and a downward change during cooling, following the retorting in the station.
  • These slope changes are free formings, effected by a surface pressure onto the panel 3c.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
EP07119557A 2007-10-29 2007-10-29 Bague de couvercle pouvant fléchir et procédé permettant de former un couvercle Withdrawn EP2055641A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07119557A EP2055641A1 (fr) 2007-10-29 2007-10-29 Bague de couvercle pouvant fléchir et procédé permettant de former un couvercle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP07119557A EP2055641A1 (fr) 2007-10-29 2007-10-29 Bague de couvercle pouvant fléchir et procédé permettant de former un couvercle

Publications (1)

Publication Number Publication Date
EP2055641A1 true EP2055641A1 (fr) 2009-05-06

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Application Number Title Priority Date Filing Date
EP07119557A Withdrawn EP2055641A1 (fr) 2007-10-29 2007-10-29 Bague de couvercle pouvant fléchir et procédé permettant de former un couvercle

Country Status (1)

Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110240641A1 (en) * 2010-04-01 2011-10-06 Edward Huels Heat Sealing Thru Food Contaminants
WO2012072383A1 (fr) 2010-11-29 2012-06-07 Crown Packaging Technology, Inc. Fermeture

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4680917A (en) 1984-08-17 1987-07-21 International Paper Company Process for providing filled containers
US5752614A (en) 1996-11-19 1998-05-19 Sonoco Products Company Easy-opening closure for hermetic sealing a retortable container
WO2005005277A1 (fr) 2003-07-01 2005-01-20 Crown Packaging Technology Inc Fermeture
WO2005019047A2 (fr) * 2003-08-19 2005-03-03 Impress Metal Packaging S.A. Bague de couvercle comprenant une partie jointive plate inclinee
WO2007045385A1 (fr) 2005-10-20 2007-04-26 Alcan Technology & Management Ltd. Procede de fabrication d'un couvercle de boite presentant une bague de couvercle et une membrane de fermeture
WO2007088212A1 (fr) 2006-02-03 2007-08-09 Impress Metal Packaging S.A. récipient extensible ayant un couvercle pour obtenir une régulation de chambre de pression d'une boite ALIMENTAIRE

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4680917A (en) 1984-08-17 1987-07-21 International Paper Company Process for providing filled containers
US5752614A (en) 1996-11-19 1998-05-19 Sonoco Products Company Easy-opening closure for hermetic sealing a retortable container
WO2005005277A1 (fr) 2003-07-01 2005-01-20 Crown Packaging Technology Inc Fermeture
WO2005019047A2 (fr) * 2003-08-19 2005-03-03 Impress Metal Packaging S.A. Bague de couvercle comprenant une partie jointive plate inclinee
WO2007045385A1 (fr) 2005-10-20 2007-04-26 Alcan Technology & Management Ltd. Procede de fabrication d'un couvercle de boite presentant une bague de couvercle et une membrane de fermeture
WO2007088212A1 (fr) 2006-02-03 2007-08-09 Impress Metal Packaging S.A. récipient extensible ayant un couvercle pour obtenir une régulation de chambre de pression d'une boite ALIMENTAIRE

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110240641A1 (en) * 2010-04-01 2011-10-06 Edward Huels Heat Sealing Thru Food Contaminants
US9073681B2 (en) * 2010-04-01 2015-07-07 Silgan Plastic Food Containers Corporation Heat sealing thru food contaminants
US9764863B2 (en) 2010-04-01 2017-09-19 Silgan Plastic Food Containers Corporation Heat sealing thru food contaminants
WO2012072383A1 (fr) 2010-11-29 2012-06-07 Crown Packaging Technology, Inc. Fermeture
US20130248533A1 (en) * 2010-11-29 2013-09-26 Crown Packaging Technology , Inc. Closure
US9475620B2 (en) 2010-11-29 2016-10-25 Crown Packaging Technology, Inc. Closure

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