US3406866A - Container panel with antifracture score - Google Patents

Container panel with antifracture score Download PDF

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Publication number
US3406866A
US3406866A US646681A US64668167A US3406866A US 3406866 A US3406866 A US 3406866A US 646681 A US646681 A US 646681A US 64668167 A US64668167 A US 64668167A US 3406866 A US3406866 A US 3406866A
Authority
US
United States
Prior art keywords
score
panel
score line
line
fracture
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.)
Expired - Lifetime
Application number
US646681A
Other languages
English (en)
Inventor
John C Jasper
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.)
Continental Can Co Inc
Original Assignee
Continental Can Co Inc
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 Continental Can Co Inc filed Critical Continental Can Co Inc
Priority to US646681A priority Critical patent/US3406866A/en
Priority to DE19681757001 priority patent/DE1757001C3/de
Priority to AT309268A priority patent/AT289638B/de
Priority to GB23668/68A priority patent/GB1201513A/en
Priority to NL6807220.A priority patent/NL160536C/xx
Priority to BE716112D priority patent/BE716112A/xx
Priority to FR1569255D priority patent/FR1569255A/fr
Application granted granted Critical
Publication of US3406866A publication Critical patent/US3406866A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B21D51/383—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures scoring lines, tear strips or pulling tabs
    • 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
    • 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
    • B65D17/32—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 having non-detachable members or portions
    • 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 relatesin general to new and useful improvements ineasy opening container ends, and more particularly-,tothe improvement of such container ends by the provision. of. an anti-fracture score therein.
  • Easy opening can ends are each provided with a score line defining a weakening line along which the can end may be ruptured tofacilita te the removal of a panel portion.
  • the score lines are formed by a punch press operation with the result that there is not a cutting away of the metal, but a compressing of the metal.
  • the score lines are generally trapezoidal in cross section and when formed in sheet metal, strain risers are formed at the bottom corners thereof. As a result, when any undue force or load is applied against the removable panel portion, there is a tendency for the can end to rupture along the line of one of the strain risers. This invention relates to the elimination of this undesired condition.
  • the secondary score line formed in the removable panel portion may be considered an anti-fracture score. Rupture of the end panel along the anti-fracture score as opposed to rupture along the weakening score line does not occur because of the reduction of strain risers therealong due to its association with the weakening score line, and because the anti-fracture score is of a lesser depth than the weakening score line.
  • FIGURE 1 is a plan view of a conventional type of easy opening container end formed prior to this invention.
  • FIGURE 1A is an enlarged fragmentary transverse sectional view taken along the line 1A1A of FIGURE 1 and shows the arrangement of strain forces in the container panel at the score line.
  • FIGURE 2 is a plan view similar to FIGURE 1 and shows a container end provided with an anti-fracture score line in accordance with this invention.
  • FIGURE 3 is an enlarged fragmentary vertical sec- 3,406,866 Patented Oct. 22, 1968 tional view taken along the line 3-3 of FIGURE 2 and shows the strain pattern in the end panel in the area 01 the two score lines.
  • FIGURE 1 a conventional type of container end which is generally referred to by the numeral 5.
  • the container end includes a peripheral seam forming portion 6 and an end panel 7.
  • a major portion of the end panel 7 is removable in the opening of the associated container, this removal of the end panel major portion being facilitated by means of a score line 8.
  • the removable panel portion has attached thereto by means of a rivet 9 a pull tab 10 of a conventional type.
  • the pull tab 10 functions as a lever and results in the fracture of the end panel 7 along the score line 8 with the result that the portion of the end panel 7 defined by the score 11:lI]1j6180may be removed as a unit utilizing only the pull
  • the score line 8 is formed in the end panel 7 by a punching operation utilizing a conventional type of scoring die (not shown).
  • the resultant score line 8 has a generally trapezoidal cross section, as is shown in FIGURE 1A. Inasmuch as the score line 8 is formed by a punchmg or pressing operation, there is no removal of metal.
  • the metal of the end panel 7 is compressed and there exists in the metal of the end panel 7 in the vicinity of the score line 8 highly concentrated internal pressures as indicated by the metal flow or strain lines 11.
  • the concentration of stress forces results in' strain risers generally along the lines A-A and B-B of FIGURE 1A. Accordingly, when the end panel 7 is unduly stressed, accidental rupture thereof will occur at the score line 8 along one of the strain risers. This invention has to do with the elimination of the strain risers.
  • FIGURE 2 it will be seen that there is illustrated a can end which constitutes an improvement over the can end 5 of FIGURE 1, the can end of FIGURE 2 being generally referred to by the numeral 15.
  • the can end 15 includes a peripheral seam forming portion 16 and an end panel 17.
  • the end panel 17 is provided with a score line 18 defining a removable panel portion 19.
  • the can end 15 has formed in the removable panel portion 19 a rivet 20 which is utilized to secure in place a pull tab 21.
  • the pull tab 21 is of the lever type and is utilized for the purpose of initiating rupture of the end panel 17 along the score line 18, followed by the tearing out of the removable panel portion 19.
  • the can end 15 differs from the can end 5 in that the removable panel portion 19 thereof is provided with a second score line 22.
  • the score line 22 is an anti-fracture score line and is formed in the removable panel portion 19 immediately adjacent the score line 18. However, the anti-fracture score line 22 is shallower than the weakening score line 18, as is clearly shown in FIG- URE 3.
  • the score lines 18 and 22 are both formed by a punching or pressing operation during which the metal of the end panel 17 is compressed and closed generally laterally.
  • the score forming operations result in the forming of internal compressive stresses within the end panel 17, as is generally defined by the strain lines 23.
  • a compari son of the strain lines 23 with the strain lines 11 of FIGURE 1A will clearly show that there is a better distribution of the compressive forces within the end panel 17 in the vicinity of the score line 18 than there exists in the end panel 7 in the vicinity of the score line 8. Furthermore, it will be readily apparent that the strain risers found in the end panel 7 are greatly diminished in the end panel 17.
  • the stress risers with respect to the anti-fracture score 22 are also at a minimum.
  • the score 22 is shallower than the score 18, it will be readily apparent that the provision of the score 22 will not provide a line of primary fracture failure as opposed to the weakening score line 18. Tests have proved that where there is failure of the end panel 17 due to accidental fracture, it will occur along the weakening score line 18 and not along the anti-fracture score 22.
  • the anti-fracture score 22 has been found to be effective with respect to can ends formed from sheet metal having a thickness ranging from 0.008 inch to 0.014 inch. It also has been found that there is a limit as to the center-to-center spacing of the scores 18 and 22. When the scores are brought too close together, the end panel is too greatly weakened in the narrow areaand when the scores are too far apart, the forming of the anti-fracture score has no influence on the weakening score line.
  • the practical range of the center-to-center spacing between the score line 18 and the anti-fracture score 22 is from 0.050 inch to 0.125 inch with the optimum spacing being on the order of 0.080 inch. Also, it has been found that there is a most effective differential in score depths irrespective of the score depths.
  • This differential is on the order of 0.003 inch with the antifracture score 22 being shallower than the weakening ,said. panel and normally resultingjn stressed .areasalong the bottom corners of saidscore, the improvement comprising an anti-fracture score formed in said removable panel portion adjacent said score line, and said score line being relieved of the normal stressed areas by the position of the anti-fracture score adjacent the first-men tioned score line.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
  • Closures For Containers (AREA)
US646681A 1967-06-16 1967-06-16 Container panel with antifracture score Expired - Lifetime US3406866A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US646681A US3406866A (en) 1967-06-16 1967-06-16 Container panel with antifracture score
DE19681757001 DE1757001C3 (de) 1967-06-16 1968-03-20 Vollaufreißdeckel aus Metall für Dosen
AT309268A AT289638B (de) 1967-06-16 1968-03-29 Leicht aufreißbarer Deckel für Behälter, insbesondere Dosen
GB23668/68A GB1201513A (en) 1967-06-16 1968-05-17 Improvements in or relating to easy opening container components
NL6807220.A NL160536C (nl) 1967-06-16 1968-05-22 Metalen wanddeel of deksel voor een houder, voorzien van een door twee op geringe afstand van elkaar aan dezelfde zijde aangebrachte kerflijnen begrensd, verwijderbaar deel.
BE716112D BE716112A (de) 1967-06-16 1968-06-05
FR1569255D FR1569255A (de) 1967-06-16 1968-06-14

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US646681A US3406866A (en) 1967-06-16 1967-06-16 Container panel with antifracture score

Publications (1)

Publication Number Publication Date
US3406866A true US3406866A (en) 1968-10-22

Family

ID=24594033

Family Applications (1)

Application Number Title Priority Date Filing Date
US646681A Expired - Lifetime US3406866A (en) 1967-06-16 1967-06-16 Container panel with antifracture score

Country Status (6)

Country Link
US (1) US3406866A (de)
AT (1) AT289638B (de)
BE (1) BE716112A (de)
FR (1) FR1569255A (de)
GB (1) GB1201513A (de)
NL (1) NL160536C (de)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3490643A (en) * 1968-01-22 1970-01-20 Dorn Co V Full opening container end
US3601279A (en) * 1969-06-30 1971-08-24 Procter & Gamble Score-line structure
JPS4814209Y1 (de) * 1970-06-19 1973-04-18
JPS50149478A (de) * 1974-03-14 1975-11-29
US3946683A (en) * 1972-12-26 1976-03-30 Aluminum Company Of America Tabless container opening device and method and tools for forming the same
US4216736A (en) * 1979-02-02 1980-08-12 Boise Cascade Corporation Method and apparatus for forming no-fin scored metal ends
EP0040277A1 (de) * 1980-05-21 1981-11-25 Toyo Seikan Kaisha Limited Leicht zu öffnender Dosendeckel mit einem Zugring
US4504181A (en) * 1978-11-29 1985-03-12 Continental Can Company, Inc. Method of forming scored metal sheet
US4577774A (en) * 1982-03-11 1986-03-25 Ball Corporation Buckle resistance for metal container closures
US4832223A (en) * 1987-07-20 1989-05-23 Ball Corporation Container closure with increased strength
USRE33217E (en) * 1982-03-11 1990-05-15 Ball Corporation Buckle resistance for metal container closures
US5816429A (en) * 1996-12-24 1998-10-06 Kobayashi; Tadao Container opening device
US5938390A (en) * 1997-12-15 1999-08-17 Aluminum Company Of America Antifracture scores for easy open container walls
WO2000021846A1 (de) * 1998-10-08 2000-04-20 Schmalbach-Lubeca Ag Temporäre aufplatzsperre in einem blechdeckel
US20100227191A1 (en) * 2009-01-29 2010-09-09 Brown Mckay C Score line corrosion protection for container end walls
US20110056945A1 (en) * 2009-09-04 2011-03-10 Christopher Paul Ramsey Full aperture beverage end
US20150147606A1 (en) * 2012-07-17 2015-05-28 Sanyo Electric Co., Ltd. Sealing plate for prismatic secondary battery, method for producing the same, and prismatic secondary battery using the same
US20150232228A1 (en) * 2014-02-17 2015-08-20 Lincoln Global, Inc. Welding consumable container with protective open rim
CN106077210A (zh) * 2007-05-25 2016-11-09 麦格纳国际公司 一体式修边模及方法
US9714114B2 (en) 2013-11-08 2017-07-25 Crown Packaging Technology, Inc. Full aperture can end
WO2019165165A1 (en) * 2018-02-22 2019-08-29 Stolle Machinery Company, Llc Push button closure

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DK11278A (da) * 1978-01-10 1979-07-11 Knudsen A S Oprivningslukke
DK1577222T3 (da) * 2004-03-09 2012-09-24 Ardagh Mp Group Netherlands Bv Dåselåg

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3322296A (en) * 1965-02-19 1967-05-30 Continental Can Co Easy opening container
US3338199A (en) * 1965-03-17 1967-08-29 American Can Co Scoring apparatus and method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3322296A (en) * 1965-02-19 1967-05-30 Continental Can Co Easy opening container
US3338199A (en) * 1965-03-17 1967-08-29 American Can Co Scoring apparatus and method

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3490643A (en) * 1968-01-22 1970-01-20 Dorn Co V Full opening container end
US3601279A (en) * 1969-06-30 1971-08-24 Procter & Gamble Score-line structure
JPS4814209Y1 (de) * 1970-06-19 1973-04-18
US3946683A (en) * 1972-12-26 1976-03-30 Aluminum Company Of America Tabless container opening device and method and tools for forming the same
JPS50149478A (de) * 1974-03-14 1975-11-29
US3954075A (en) * 1974-03-14 1976-05-04 Aluminum Company Of America Easy-open container wall and apparatus and method for producing improved container wall
US4504181A (en) * 1978-11-29 1985-03-12 Continental Can Company, Inc. Method of forming scored metal sheet
US4216736A (en) * 1979-02-02 1980-08-12 Boise Cascade Corporation Method and apparatus for forming no-fin scored metal ends
EP0040277A1 (de) * 1980-05-21 1981-11-25 Toyo Seikan Kaisha Limited Leicht zu öffnender Dosendeckel mit einem Zugring
US4577774A (en) * 1982-03-11 1986-03-25 Ball Corporation Buckle resistance for metal container closures
USRE33217E (en) * 1982-03-11 1990-05-15 Ball Corporation Buckle resistance for metal container closures
US4832223A (en) * 1987-07-20 1989-05-23 Ball Corporation Container closure with increased strength
US5816429A (en) * 1996-12-24 1998-10-06 Kobayashi; Tadao Container opening device
US5938390A (en) * 1997-12-15 1999-08-17 Aluminum Company Of America Antifracture scores for easy open container walls
WO2000021846A1 (de) * 1998-10-08 2000-04-20 Schmalbach-Lubeca Ag Temporäre aufplatzsperre in einem blechdeckel
US6908005B1 (en) 1998-10-08 2005-06-21 Schmalbach-Lubeca Ag Temporary burst stoppage in a sheet metal top
CN106077210A (zh) * 2007-05-25 2016-11-09 麦格纳国际公司 一体式修边模及方法
US20100227191A1 (en) * 2009-01-29 2010-09-09 Brown Mckay C Score line corrosion protection for container end walls
US8939308B2 (en) * 2009-09-04 2015-01-27 Crown Packaging Technology, Inc. Full aperture beverage end
US20110056945A1 (en) * 2009-09-04 2011-03-10 Christopher Paul Ramsey Full aperture beverage end
US10053260B2 (en) 2009-09-04 2018-08-21 Crown Packaging Technology, Inc. Full aperture beverage end
US20150147606A1 (en) * 2012-07-17 2015-05-28 Sanyo Electric Co., Ltd. Sealing plate for prismatic secondary battery, method for producing the same, and prismatic secondary battery using the same
US9741985B2 (en) * 2012-07-17 2017-08-22 Sanyo Electric Co., Ltd. Sealing plate for prismatic secondary battery, method for producing the same, and prismatic secondary battery using the same
US9714114B2 (en) 2013-11-08 2017-07-25 Crown Packaging Technology, Inc. Full aperture can end
US20150232228A1 (en) * 2014-02-17 2015-08-20 Lincoln Global, Inc. Welding consumable container with protective open rim
US9682798B2 (en) * 2014-02-17 2017-06-20 Lincoln Global, Inc. Welding consumable container with protective open rim
WO2019165165A1 (en) * 2018-02-22 2019-08-29 Stolle Machinery Company, Llc Push button closure
US10954031B2 (en) 2018-02-22 2021-03-23 Stolle Machinery Company, Llc Push button closure
EP3755637A4 (de) * 2018-02-22 2021-04-28 Stolle Machinery Company, LLC Druckknopfverschluss
US11745915B2 (en) 2018-02-22 2023-09-05 Stolle Machinery Company, Llc Push button closure

Also Published As

Publication number Publication date
DE1757001A1 (de) 1972-01-27
GB1201513A (en) 1970-08-05
NL6807220A (de) 1968-12-17
DE1757001B2 (de) 1976-09-09
NL160536B (nl) 1979-06-15
NL160536C (nl) 1979-11-15
FR1569255A (de) 1969-05-30
AT289638B (de) 1971-04-26
BE716112A (de) 1968-11-04

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