EP1577222B1 - Tin lid - Google Patents

Tin lid Download PDF

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Publication number
EP1577222B1
EP1577222B1 EP04075710A EP04075710A EP1577222B1 EP 1577222 B1 EP1577222 B1 EP 1577222B1 EP 04075710 A EP04075710 A EP 04075710A EP 04075710 A EP04075710 A EP 04075710A EP 1577222 B1 EP1577222 B1 EP 1577222B1
Authority
EP
European Patent Office
Prior art keywords
lid
score line
furrow
sheet metal
container
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.)
Revoked
Application number
EP04075710A
Other languages
German (de)
French (fr)
Other versions
EP1577222A1 (en
Inventor
Hein Willem Leendert Van Jaarsveld
Fabrice Leboucher
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 Group Netherlands BV
Original Assignee
Ardagh MP Group Netherlands BV
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=34833685&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1577222(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Ardagh MP Group Netherlands BV filed Critical Ardagh MP Group Netherlands BV
Priority to PT04075710T priority Critical patent/PT1577222E/en
Priority to EP04075710A priority patent/EP1577222B1/en
Priority to PL04075710T priority patent/PL1577222T3/en
Priority to DK04075710.6T priority patent/DK1577222T3/en
Publication of EP1577222A1 publication Critical patent/EP1577222A1/en
Application granted granted Critical
Publication of EP1577222B1 publication Critical patent/EP1577222B1/en
Anticipated expiration legal-status Critical
Revoked 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
    • 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
    • B65D2517/001—Action for opening container
    • B65D2517/0016—Action for opening container pivot tab, push-down and pull-out tear 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
    • B65D2517/0059—General cross-sectional shape of container end panel
    • B65D2517/0061—U-shaped
    • B65D2517/0062—U-shaped and provided with an additional U-shaped peripheral channel
    • 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
    • B65D2517/0074—Local recess in container end panel

Definitions

  • the invention relates to a lid for a sheet metal container, which lid comprises:
  • Such lids are widely used for containers for foodstuff.
  • Such containers are filled with the foodstuff and a lid according to the preamble is attached to the container, for example by seaming.
  • the containers are sterilized.
  • the containers are subjected to a heat treatment and afterwards cooled off.
  • the gasses inside of the container expand subjecting the container to an over pressure.
  • This pressure gets too high a so called peaking effect arises, which may breakes the score line resulting in a leaking container.
  • the peaking effect is that a part of the lid is permanently deformed. Due to this deformation the container cannot be sold anymore, but also this peaking jeopardizes the airtightness of the score line.
  • the lid In order to avoid peaking the lid should have a minimum thickness. This thickness depends on the material used.
  • the furrows provide an increased stiffness of the lid near the score line, such that the peaking effect is suppressed.
  • the extra stiffness of the furrows has a further advantage when opening the lid by pulling up the tab, such that part of the score line is broken. Due to the increased stiffness around the score line a consumer can generate with a tab a larger tear in the score line, which reduces the energy necessary to pull out the complete tear-out part of the lid.
  • the lid comprises two additional furrows arranged adjacent to the tab. This furthermore increases the strength of the lid and provides better opening properties.
  • the furrow in the tear-out part is parallel to the score line. This provides for a constant stiffness along the score line.
  • the distance of the centerline of the furrow to in the team-out part the score line is in range of 0.75-2 times preferably 1 time, the width of the furrow.
  • the score line can be damaged when providing a furrow into the lid after the score line has been manufactured. If the furrow is too distanced from the score line the contribution of the furrow to the stiffness is low.
  • the sheet metal body comprises a curled edge for seaming to a container.
  • the tear-out part of the lid according to the invention comprises at least one recessed part. If more recessed parts are provided it is preferred to have the recessed parts terraced. These recessed parts provide additional stiffness to the lid, which is mostly of importance to the appearance of containers having such a lid. If the inside atmosphere of the container is under pressure, the lid would have the tendency to become convex. For a consumer this is not attractive.
  • the invention furthermore relates to a container comprising:
  • the lid is seamed to the upstanding wall.
  • the furrow is arranged along the complete length of the score line, for example in the region of the tab.
  • the center part 3 has on either side of the tab an additional furrow 9. These two furrows 9 extend substantially perpendicular to the longitudinal direction of the tab 4. The furrows 9 are located between the rivet 7 and the score line 5 and provide additional stiffness to the part which is pushed open with the tab 4.
  • Figure 2A shows a cross-sectional view along the line II of figure 1 .
  • Figure 2B shows a detail of figure 2A .
  • the tab 4 is attached to the lid 1 by a rivet 7 formed out of the sheet metal body of the lid 1.
  • the tab 4 ends just before the score line 5. So when the tab 4 is lifted the end of the tab 4 will press just besides score line 5 in order to brake this score line.
  • the furrow 6 provides for additional stiffness such that the tearing open of the score line is made easier.
  • the edge 2 of the lid 1 is curved such that it could be seamed to a conventional container.
  • Figure 3 shows a cross-sectional view along the line III of figure 1 .
  • the furrow 6 is also present in this cross-sectional view and has the same depth in this embodiment as the part shown in figure 2A .
  • This furrow 6 extends along the complete periphery of the lid 1.
  • a first recessed part 8 is further shown.
  • the depth of the furrow 6 can also be varied along its length in order to adjust the tear-out-properties of the center part 3.

Landscapes

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

Description

  • The invention relates to a lid for a sheet metal container, which lid comprises:
    • a sheet metal body;
    • a score line substantially arranged along the periphery of the sheet metal body and defining a tear-out part;
    • a tab attached to the tear-out part of the sheet metal body.
  • Such lids are widely used for containers for foodstuff. Such containers are filled with the foodstuff and a lid according to the preamble is attached to the container, for example by seaming. Afterwards the containers are sterilized. With this sterilizing the containers are subjected to a heat treatment and afterwards cooled off. During the heat treatment the gasses inside of the container expand subjecting the container to an over pressure. When this pressure gets too high a so called peaking effect arises, which may breakes the score line resulting in a leaking container. The peaking effect is that a part of the lid is permanently deformed. Due to this deformation the container cannot be sold anymore, but also this peaking jeopardizes the airtightness of the score line.
  • In order to avoid peaking the lid should have a minimum thickness. This thickness depends on the material used.
  • As these containers are manufactured in large numbers a small reduction in material costs could save a substantial amount of money.
  • Therefore it is an object of the invention to provide a lid, which can better resist peaking.
  • This object is achieved with a lid according to the invention as defined in claim 1.
  • US 4,511,299 discloses a lid according to the preamble of claim 1.
  • The furrows provide an increased stiffness of the lid near the score line, such that the peaking effect is suppressed.
  • The extra stiffness of the furrows has a further advantage when opening the lid by pulling up the tab, such that part of the score line is broken. Due to the increased stiffness around the score line a consumer can generate with a tab a larger tear in the score line, which reduces the energy necessary to pull out the complete tear-out part of the lid.
  • The lid comprises two additional furrows arranged adjacent to the tab. This furthermore increases the strength of the lid and provides better opening properties.
  • In another preferred embodiment of the lid according to the invention the furrow in the tear-out part is parallel to the score line. This provides for a constant stiffness along the score line.
  • In yet another preferred embodiment of the lid according to the invention the distance of the centerline of the furrow to in the team-out part the score line is in range of 0.75-2 times preferably 1 time, the width of the furrow.
  • If the furrow is too close to the score line, the score line can be damaged when providing a furrow into the lid after the score line has been manufactured. If the furrow is too distanced from the score line the contribution of the furrow to the stiffness is low.
  • In yet another embodiment of the lid according to the invention the sheet metal body comprises a curled edge for seaming to a container.
  • Preferably the tear-out part of the lid according to the invention comprises at least one recessed part. If more recessed parts are provided it is preferred to have the recessed parts terraced. These recessed parts provide additional stiffness to the lid, which is mostly of importance to the appearance of containers having such a lid. If the inside atmosphere of the container is under pressure, the lid would have the tendency to become convex. For a consumer this is not attractive.
  • The invention furthermore relates to a container comprising:
    • a bottom part;
    • an upstanding wall arranged along the periphery of the bottom part; and
    • a lid according to any of the preceding claims arranged to the upper edge of the upstanding wall.
  • Preferably the lid is seamed to the upstanding wall.
  • These and other advantages of the invention will be elucidated in conjunction of the accompanying drawings.
    • Figure 1 shows a perspective view of an embodiment of a lid according to the invention.
    • Figure 2A shows a cross-sectional view along the line II of figure 1.
    • Figure 2B shows a detail of the cross-sectional view of figure 2A.
    • Figure 3 shows a cross-sectional view along the line III of figure 1.
    • Figure 1 shows a lid 1 according to the invention.
    This lid is made of sheet metal. The lid 1 has an edge part 2 and a center part 3. The center part 3 comprises a number of recesses, which are terraced. The center part 3 can be teared out by pulling the tab 4. The center part 3 is defined by the score line 5. Parallel to this score line 5 a furrow 6 is arranged, which provides additional stiffness in the tear part adjacent to the score line.
  • In this embodiment the furrow is arranged along the complete length of the score line, for example in the region of the tab.
  • The center part 3 has on either side of the tab an additional furrow 9. These two furrows 9 extend substantially perpendicular to the longitudinal direction of the tab 4. The furrows 9 are located between the rivet 7 and the score line 5 and provide additional stiffness to the part which is pushed open with the tab 4.
  • Figure 2A shows a cross-sectional view along the line II of figure 1. Figure 2B shows a detail of figure 2A. The tab 4 is attached to the lid 1 by a rivet 7 formed out of the sheet metal body of the lid 1. The tab 4 ends just before the score line 5. So when the tab 4 is lifted the end of the tab 4 will press just besides score line 5 in order to brake this score line. The furrow 6 provides for additional stiffness such that the tearing open of the score line is made easier. The edge 2 of the lid 1 is curved such that it could be seamed to a conventional container.
  • Figure 3 shows a cross-sectional view along the line III of figure 1. The furrow 6 is also present in this cross-sectional view and has the same depth in this embodiment as the part shown in figure 2A. This furrow 6 extends along the complete periphery of the lid 1. In figure 3 a first recessed part 8 is further shown.
  • The depth of the furrow 6 can also be varied along its length in order to adjust the tear-out-properties of the center part 3.

Claims (8)

  1. A lid (1) for a sheet metal container, which lid (1) comprises:
    - a sheet metal body;
    - an edge part (2) for seaming to a container;
    - a score line (5) substantially arranged along the periphery of the sheet metal body and defining a tear-out part (3);
    - a tab (4) attached to the tear-out part (3) of the sheet metal body;
    - a furrow (6) arranged in the tear-out part (3) of the sheet metal body adjacent and parallel along the score line (5); and
    - a furrow arranged in a lid part between the score line (5) and the edge part (2), and adjacent and parallel along the score line (5),
    characterized in that at least two additional furrows (9) are arranged on sides of the tab (4).
  2. A lid (1) according to claim 1, wherein the distance of the centerline of the furrow (6) to the score line (5) is in the range of 0.75 - 2 times, preferably 1 time, the width of the furrow (6).
  3. A lid (1) according to any of the preceding claims, wherein the sheet metal body comprises a curled edge for seaming to a container.
  4. A lid (1) according to any of the preceding claims, wherein the tear-out part (3) comprises at least one recessed part (8).
  5. A lid (1) according to claim 4, wherein recessed parts are terraced.
  6. A lid (1) according to claim 4 or 5, wherein at least one recessed part is non-circular.
  7. Container comprising:
    - a bottom part;
    - an upstanding wall arranged along the periphery of the bottom part; and
    - a lid (1) according to any of the preceding claims arranged to the upper edge of the upstanding wall.
  8. Container according to claim 8, wherein the lid (1) is seamed to the upstanding wall.
EP04075710A 2004-03-09 2004-03-09 Tin lid Revoked EP1577222B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
PT04075710T PT1577222E (en) 2004-03-09 2004-03-09 Tin lid
EP04075710A EP1577222B1 (en) 2004-03-09 2004-03-09 Tin lid
PL04075710T PL1577222T3 (en) 2004-03-09 2004-03-09 Tin lid
DK04075710.6T DK1577222T3 (en) 2004-03-09 2004-03-09 Can end

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04075710A EP1577222B1 (en) 2004-03-09 2004-03-09 Tin lid

Publications (2)

Publication Number Publication Date
EP1577222A1 EP1577222A1 (en) 2005-09-21
EP1577222B1 true EP1577222B1 (en) 2012-06-13

Family

ID=34833685

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04075710A Revoked EP1577222B1 (en) 2004-03-09 2004-03-09 Tin lid

Country Status (4)

Country Link
EP (1) EP1577222B1 (en)
DK (1) DK1577222T3 (en)
PL (1) PL1577222T3 (en)
PT (1) PT1577222E (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9016034B2 (en) 2008-09-04 2015-04-28 Crown Packaging Technology, Inc. Easily openable can end, container, and methods of forming
US9199763B2 (en) 2008-01-18 2015-12-01 Crown Packaging Technology, Inc. Can end
EP3028952B1 (en) 2014-12-01 2020-02-12 Ardagh MP Group Netherlands B.V. Closure for a container and a container provided therewith

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200289188Y1 (en) 2002-06-11 2002-09-13 전정욱 Readily openable can lid
US8939308B2 (en) 2009-09-04 2015-01-27 Crown Packaging Technology, Inc. Full aperture beverage end
EP2671813A1 (en) 2012-06-07 2013-12-11 Crown Packaging Technology, Inc Easy open closure with improved pressure performance
US9714114B2 (en) 2013-11-08 2017-07-25 Crown Packaging Technology, Inc. Full aperture can end
JP2017512163A (en) 2014-03-07 2017-05-18 ボール コーポレイションＢａｌｌ Ｃｏｒｐｏｒａｔｉｏｎ End closure with large opening ring pull tab
US10632520B2 (en) 2014-03-07 2020-04-28 Ball Corporation End closure with large opening ring pull tab
FR3064993B1 (en) * 2017-04-06 2019-04-05 Ardagh Mp Group Netherlands B.V. SYSTEM FOR OPENED OPENING OF EASY-OPENING METAL COVER SUBJECTED TO DIFFERENTIAL GAS PRESSURE

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4511299A (en) * 1983-09-01 1985-04-16 Automated Container Corporation Pull-tab forming method

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3406866A (en) * 1967-06-16 1968-10-22 Continental Can Co Container panel with antifracture score
US3698590A (en) * 1968-02-16 1972-10-17 Cookson Sheet Metal Dev Ltd Frangible elements in sheet material
US3905514A (en) * 1972-03-16 1975-09-16 Dorn Co V Can end with protective bead
CH616895A5 (en) * 1976-05-07 1980-04-30 Styner & Bienz Ag Can with a lid which can be torn open along a weakening groove and method for producing this can
US5252019A (en) * 1992-01-21 1993-10-12 Weirton Steel Corporation Convenience-feature non-circular end closure with interrupted panel profiling
EP1182140A1 (en) * 2000-03-06 2002-02-27 Crown Cork & Seal Technologies Corporation Food can end

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4511299A (en) * 1983-09-01 1985-04-16 Automated Container Corporation Pull-tab forming method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9199763B2 (en) 2008-01-18 2015-12-01 Crown Packaging Technology, Inc. Can end
US9016034B2 (en) 2008-09-04 2015-04-28 Crown Packaging Technology, Inc. Easily openable can end, container, and methods of forming
EP3028952B1 (en) 2014-12-01 2020-02-12 Ardagh MP Group Netherlands B.V. Closure for a container and a container provided therewith
EP3028952B2 (en) † 2014-12-01 2024-01-31 Ardagh MP Group Netherlands B.V. Closure for a container and a container provided therewith

Also Published As

Publication number Publication date
PT1577222E (en) 2012-08-22
DK1577222T3 (en) 2012-09-24
EP1577222A1 (en) 2005-09-21
PL1577222T3 (en) 2012-11-30

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