US20050082292A1 - Can end - Google Patents

Can end Download PDF

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Publication number
US20050082292A1
US20050082292A1 US10/503,218 US50321804A US2005082292A1 US 20050082292 A1 US20050082292 A1 US 20050082292A1 US 50321804 A US50321804 A US 50321804A US 2005082292 A1 US2005082292 A1 US 2005082292A1
Authority
US
United States
Prior art keywords
flat portion
panel
wall
score
countersink
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.)
Abandoned
Application number
US10/503,218
Other languages
English (en)
Inventor
Terence Benge
Robert Watkins
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.)
Crown Packaging Technology Inc
Original Assignee
Individual
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 Individual filed Critical Individual
Assigned to CROWN CORK & SEAL TECHNOLOGIES CORPORATION reassignment CROWN CORK & SEAL TECHNOLOGIES CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: WATKINS, ROBERT, BENGE, TERENCE ALEXANDER
Publication of US20050082292A1 publication Critical patent/US20050082292A1/en
Assigned to DEUTSCHE BANK AG NEW YORK BRANCH, AS AGENT reassignment DEUTSCHE BANK AG NEW YORK BRANCH, AS AGENT SECOND AMENDED & RESTATED PATENT SECURITY AGREEMEN Assignors: CROWN PACKAGING TECHNOLOGY, INC.
Assigned to CROWN PACKAGING TECHNOLOGY, INC. reassignment CROWN PACKAGING TECHNOLOGY, INC. RELEASE OF SECURITY INTEREST Assignors: DEUTSCHE BANK AG NEW YORK BRANCH
Abandoned 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
    • B65D17/28—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
    • B65D17/4011—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 completely by means of a tearing tab

Definitions

  • This invention relates to a can end and, in particular to a can end which is adapted for opening by at least two different methods.
  • Easy open can ends in which a ring pull or tab is provided for removal of a panel defined by a score line
  • Full aperture easy open ends in which the score line surrounds the whole of a centre panel adjacent to the circumferential seam are in common use for the packaging of food items.
  • Such ends open in two stages: an initial “pop” when the tab is raised and tilted to rupture the score and break any vacuum within the can, and a “tear” stage when the tab is pulled away from the can in order to peel open and remove the end.
  • Much design work has been directed to reducing the forces required for opening the can end, without compromising the integrity of the can or reducing pressure resistance to unacceptable levels.
  • This invention seeks to provide a solution to this problem.
  • a can end comprising a seaming panel, a wall depending from the seaming panel, a countersink bead and a centre panel; in which the centre panel includes a circumferential score and a tab adjacent the score, and the can end further includes a substantially flat portion between the wall and the countersink bead, such that the can end is adapted for opening either by raising the tab to rupture the score and thereby remove the centre panel, or by engaging the flat portion with a can opener blade and cutting around an annulus defined by the flat portion to remove the radially inward part of the can end, including the countersink and centre panel.
  • the invention also provides a two piece can comprising a can body with integral base, and the can end described above.
  • the dual opening characteristics of the can end of the present invention are particularly pertinent to use with a two piece can body as it is not possible to use a conventional can opener to open the base of a two piece can which lacks any seam on which the conventional opener engages.
  • FIG. 1 is a side section of a prior art full aperture easy open end
  • FIG. 2 is an enlarged part side section of another prior art full aperture easy open end
  • FIG. 3 is a side section of the end of the present invention.
  • FIG. 4 is the enlarged view of IV in FIG. 3 ;
  • FIG. 5 is the enlarged view of V in FIG. 3 .
  • the easy open can end 10 of FIG. 1 includes a seaming panel 12 , wall 14 joining the seaming panel 12 to a countersink bead 16 and inner wall 18 of the countersink bead which supports a centre panel 20 of the can end.
  • a line of weakness typically in the form of a score, extends around the centre panel 10 near the wall 14 to define a removable panel.
  • a pull tab 22 is fixed to an integral rivet 24 raised from the metal of the centre panel 20 .
  • the tab is raised to break or “pop” the score line and is then pulled progressively to remove the removable panel by tearing the rest of the score line.
  • European patent application EP-98921661.9 describes how selective positioning of the tab with respect to the grain orientation of the metal of the can end reduces tear force requirements without adversely affecting the pop force needed to break the score. Orienting of the can end during manufacture, however, necessitates extra tooling and, possibly, additional tooling stations. Whilst the resultant can end may be more readily opened than conventional easy open ends, the extra capital costs involved may deter some manufacturers.
  • FIG. 2 shows the part of a can end which included seaming panel 12 , centre panel 20 and score 30 .
  • this can end there is no countersink and the wall 14 ′ is joined to the centre panel 20 by a double fold 32 , 34 .
  • Score 30 is situated in lower fold 34 , rather than on the centre panel, and is partially covered by upper fold 32 .
  • This means that the aperture obtained on opening the can end is maximised as not only centre panel 20 , but also most of lower fold 34 is removed. Nonetheless, the abuse resistance of this can end is poor (i.e. when the can is dropped) as distortion of the double fold is transmitted directly through the score, causing score rupture.
  • pressure changes within the can may lead to rotation of the tab until it becomes hooked over the seam and risks hook-up on parts of the retort apparatus.
  • the outer wall of the countersink 16 is integral with the wall 14 .
  • the wall 14 and outer wall 17 of the countersink 16 are separated by a flat “stepped” portion 19 .
  • the nose 23 of pull tab 22 overlies the score 26 in the centre panel 20 , as in FIG. 1 .
  • FIG. 3 to 5 not only gives better performance than the prior art design of FIG. 2 and equal pressure resistance to the design of FIG. 1 , but it also offers an alternative opening method to the consumer.
  • the pull tab to break the score and remove the centre panel 20 in conventional manner, there is an alternative available to those unwilling or unable to use the tab.
  • the “stepped portion” 19 between wall 14 and outer wall 17 of the countersink 16 comprises a flat annulus of approximately 4 mm in width (difference between inner and outer diameter).
  • the height of wall 14 (distance h in FIG. 4 ) must be no more than 4 mm or a can opener will be unable to engage the annulus 19 . This height should be from 3 mm to 4 mm, typically about 3.5 mm.
  • the annulus can be up to 10 mm although clearly the larger the annulus, the smaller the aperture of an end of the same overall diameter will be. Furthermore, a can end having an annulus of much greater than 4 mm may have unacceptable pressure performance.
  • the annulus should be at least 1 mm in width and ideally not be less than 2 mm to allow sufficient width of flat portion for engagement with a can opener.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Devices For Opening Bottles Or Cans (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
US10/503,218 2002-02-15 2003-01-20 Can end Abandoned US20050082292A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP02251059A EP1336570A1 (de) 2002-02-15 2002-02-15 Dosendeckel
EP02251059.8 2002-02-15
PCT/EP2003/000521 WO2003068615A1 (en) 2002-02-15 2003-01-20 Can end

Publications (1)

Publication Number Publication Date
US20050082292A1 true US20050082292A1 (en) 2005-04-21

Family

ID=27619186

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/503,218 Abandoned US20050082292A1 (en) 2002-02-15 2003-01-20 Can end

Country Status (6)

Country Link
US (1) US20050082292A1 (de)
EP (2) EP1336570A1 (de)
AT (1) ATE358059T1 (de)
AU (1) AU2003210171A1 (de)
DE (1) DE60312823T2 (de)
WO (1) WO2003068615A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110006065A1 (en) * 2007-12-24 2011-01-13 Impress Group B.V. Can, Panel for a Can and a Method for Making Such a Panel for Can
US20120125933A1 (en) * 2008-08-21 2012-05-24 Impress Group B.V. Lid for a can and method for orientating such a lid

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8939308B2 (en) 2009-09-04 2015-01-27 Crown Packaging Technology, Inc. Full aperture beverage end
US9714114B2 (en) 2013-11-08 2017-07-25 Crown Packaging Technology, Inc. Full aperture can end

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5169017A (en) * 1990-09-05 1992-12-08 H. J. Heinz Company Can end closure apparatus
US6126029A (en) * 1996-09-26 2000-10-03 Glud & Marstrand A/S Can with a cover provided with a pull ring
US6234337B1 (en) * 1998-08-14 2001-05-22 H.J. Heinz Company Safe container end closure and method for fabricating a safe container end closure

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2168672B (en) * 1984-12-11 1989-01-11 Toyo Seikan Kaisha Ltd Lid for readily openable can

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5169017A (en) * 1990-09-05 1992-12-08 H. J. Heinz Company Can end closure apparatus
US6126029A (en) * 1996-09-26 2000-10-03 Glud & Marstrand A/S Can with a cover provided with a pull ring
US6234337B1 (en) * 1998-08-14 2001-05-22 H.J. Heinz Company Safe container end closure and method for fabricating a safe container end closure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110006065A1 (en) * 2007-12-24 2011-01-13 Impress Group B.V. Can, Panel for a Can and a Method for Making Such a Panel for Can
US20120125933A1 (en) * 2008-08-21 2012-05-24 Impress Group B.V. Lid for a can and method for orientating such a lid
US8534485B2 (en) * 2008-08-21 2013-09-17 Impress Group B.V. Lid for a can and method for orientating such a Lid

Also Published As

Publication number Publication date
ATE358059T1 (de) 2007-04-15
WO2003068615A1 (en) 2003-08-21
EP1474338B1 (de) 2007-03-28
DE60312823T2 (de) 2007-08-16
DE60312823D1 (de) 2007-05-10
EP1336570A1 (de) 2003-08-20
EP1474338A1 (de) 2004-11-10
AU2003210171A1 (en) 2003-09-04

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Legal Events

Date Code Title Description
AS Assignment

Owner name: CROWN CORK & SEAL TECHNOLOGIES CORPORATION, ILLINO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BENGE, TERENCE ALEXANDER;WATKINS, ROBERT;REEL/FRAME:016129/0119;SIGNING DATES FROM 20040709 TO 20040712

AS Assignment

Owner name: DEUTSCHE BANK AG NEW YORK BRANCH, AS AGENT, NEW JE

Free format text: SECOND AMENDED & RESTATED PATENT SECURITY AGREEMEN;ASSIGNOR:CROWN PACKAGING TECHNOLOGY, INC.;REEL/FRAME:017097/0001

Effective date: 20051118

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION

AS Assignment

Owner name: CROWN PACKAGING TECHNOLOGY, INC., ILLINOIS

Free format text: RELEASE OF SECURITY INTEREST;ASSIGNOR:DEUTSCHE BANK AG NEW YORK BRANCH;REEL/FRAME:032389/0380

Effective date: 20131219