EP1336570A1 - Dosendeckel - Google Patents

Dosendeckel Download PDF

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Publication number
EP1336570A1
EP1336570A1 EP02251059A EP02251059A EP1336570A1 EP 1336570 A1 EP1336570 A1 EP 1336570A1 EP 02251059 A EP02251059 A EP 02251059A EP 02251059 A EP02251059 A EP 02251059A EP 1336570 A1 EP1336570 A1 EP 1336570A1
Authority
EP
European Patent Office
Prior art keywords
panel
score
countersink
wall
flat portion
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Withdrawn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
EP02251059A
Other languages
English (en)
French (fr)
Inventor
Terence Alexander 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
Crown Cork and Seal Technologies Corp
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 Crown Cork and Seal Technologies Corp filed Critical Crown Cork and Seal Technologies Corp
Priority to EP02251059A priority Critical patent/EP1336570A1/de
Priority to EP03739439A priority patent/EP1474338B1/de
Priority to US10/503,218 priority patent/US20050082292A1/en
Priority to AT03739439T priority patent/ATE358059T1/de
Priority to PCT/EP2003/000521 priority patent/WO2003068615A1/en
Priority to AU2003210171A priority patent/AU2003210171A1/en
Priority to DE60312823T priority patent/DE60312823T2/de
Publication of EP1336570A1 publication Critical patent/EP1336570A1/de
Withdrawn legal-status Critical Current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
    • B65D17/28—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 easy open can end 10 of figure 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.
  • the enlarged section of figure 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 figure 1.
  • a most important aspect of the present invention is that the can end of figure 3 to 5 not only gives better performance than the prior art design of figure 2 and equal pressure resistance to the design of figure 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).
  • This 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.
  • the annulus should ideally not be less than 2 mm as this will leave insufficient width of flat portion for engagement of a can opener.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Devices For Opening Bottles Or Cans (AREA)
EP02251059A 2002-02-15 2002-02-15 Dosendeckel Withdrawn EP1336570A1 (de)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP02251059A EP1336570A1 (de) 2002-02-15 2002-02-15 Dosendeckel
EP03739439A EP1474338B1 (de) 2002-02-15 2003-01-20 Dosenende
US10/503,218 US20050082292A1 (en) 2002-02-15 2003-01-20 Can end
AT03739439T ATE358059T1 (de) 2002-02-15 2003-01-20 Dosenende
PCT/EP2003/000521 WO2003068615A1 (en) 2002-02-15 2003-01-20 Can end
AU2003210171A AU2003210171A1 (en) 2002-02-15 2003-01-20 Can end
DE60312823T DE60312823T2 (de) 2002-02-15 2003-01-20 Dosenende

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP02251059A EP1336570A1 (de) 2002-02-15 2002-02-15 Dosendeckel

Publications (1)

Publication Number Publication Date
EP1336570A1 true EP1336570A1 (de) 2003-08-20

Family

ID=27619186

Family Applications (2)

Application Number Title Priority Date Filing Date
EP02251059A Withdrawn EP1336570A1 (de) 2002-02-15 2002-02-15 Dosendeckel
EP03739439A Expired - Lifetime EP1474338B1 (de) 2002-02-15 2003-01-20 Dosenende

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP03739439A Expired - Lifetime EP1474338B1 (de) 2002-02-15 2003-01-20 Dosenende

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)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2568435T3 (es) * 2007-12-24 2016-04-29 Ardagh Mp Group Netherlands B.V. Bote de lata y un método para hacer tal bote de lata
ES2527928T3 (es) * 2008-08-21 2015-02-02 Ardagh Mp Group Netherlands B.V. Tapa para un bote y método para orientar dicha tapa
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
GB2168672A (en) * 1984-12-11 1986-06-25 Toyo Seikan Kaisha Ltd Protective covering for score of easy open can end
US5169017A (en) * 1990-09-05 1992-12-08 H. J. Heinz Company Can end closure apparatus
WO2000009406A1 (en) * 1998-08-14 2000-02-24 H.J. Heinz Company Safe opening can end and method of manufacturing

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK173974B1 (da) * 1996-09-26 2002-03-18 Glud & Marstrand As Dåse med låg, som er forsynet med løftering

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2168672A (en) * 1984-12-11 1986-06-25 Toyo Seikan Kaisha Ltd Protective covering for score of easy open can end
US5169017A (en) * 1990-09-05 1992-12-08 H. J. Heinz Company Can end closure apparatus
WO2000009406A1 (en) * 1998-08-14 2000-02-24 H.J. Heinz Company Safe opening can end and method of manufacturing

Also Published As

Publication number Publication date
US20050082292A1 (en) 2005-04-21
DE60312823T2 (de) 2007-08-16
AU2003210171A1 (en) 2003-09-04
WO2003068615A1 (en) 2003-08-21
DE60312823D1 (de) 2007-05-10
ATE358059T1 (de) 2007-04-15
EP1474338B1 (de) 2007-03-28
EP1474338A1 (de) 2004-11-10

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

AKX Designation fees paid
REG Reference to a national code

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RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: CROWN PACKAGING TECHNOLOGY, INC

STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 20040221