US3272381A - Can end for easy opening beverage cans - Google Patents

Can end for easy opening beverage cans Download PDF

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Publication number
US3272381A
US3272381A US354663A US35466364A US3272381A US 3272381 A US3272381 A US 3272381A US 354663 A US354663 A US 354663A US 35466364 A US35466364 A US 35466364A US 3272381 A US3272381 A US 3272381A
Authority
US
United States
Prior art keywords
score line
weakening line
line
end panel
starting
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
US354663A
Other languages
English (en)
Inventor
John S Bozek
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 US354663A priority Critical patent/US3272381A/en
Priority to DE19641432133 priority patent/DE1432133A1/de
Priority to FR996467A priority patent/FR1414661A/fr
Priority to AT70365A priority patent/AT253413B/de
Priority to BE661348D priority patent/BE661348A/xx
Priority to NL6503717A priority patent/NL6503717A/xx
Application granted granted Critical
Publication of US3272381A publication Critical patent/US3272381A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • B65D17/34—Arrangement or construction of pull or lift tabs
    • B65D17/36—Arrangement or construction of pull or lift tabs adapted for engagement with opening tools, e.g. slotted keys
    • B65D17/38—Arrangement or construction of pull or lift tabs adapted for engagement with opening tools, e.g. slotted keys with strip or tool guides
    • 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
    • B65D17/4012—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 partially by means of a tearing tab

Definitions

  • This invention relates in general to new and useful improvements in cans of the easy opening type, and more particularly to a can end of the easy opening type particularly adapted for use in conjunction with a product which may be subjected to gaseous pressure at the time of the opening of an associated can.
  • This invention particularly relates to a can end of the easy opening type which is particularly adapted for use in the packaging and dispensing of beverages which are packaged under a gaseous pressure, although the invention may be applied equally as well to can ends which are particularly adapted for the dispensing of products other than beverages but wherein the products may be subjected to gaseous pressure at the time the associated cans are opened.
  • the packaging of beer and carbonated beverages has always presented problems to the can industry in that the pressures involved require stronger can construction and the possibility of blow-out is always present.
  • the problem of blow-out due to the gaseous pressure within the can is also existent with respect to easy opening can ends.
  • the usual easy opening can end has a removable portion which is defined by a weakening line and to which there is normally attached at one end a pull tab. In the opening of a can employing such a can end, a lifting force is applied to the pull tab with the result that the end panel of the can end is ruptured at the starting end of the removable portion.
  • the removable portion of the can end be ing defined by a weakening line which has parts of major resistance to rupture adjacent to, but spaced from, the starting portion of the weakening line, whereby any tend- "ice ency for the continued uncontrolled rupture of the can end along the weakening line after the initial rupture of the can end due to the gaseous pressure within the associated can will be resisted by these parts of the Weakening line, and at the same time, the parts of maximum resistance to rupture will be relatively short and so spaced with respect to the starting portion of the weakening line wherein during the normal opening of the can, there will remain in advance of the part of maximum resistance weakening line portions along which the can end may be readily torn so that a momentum or inertia towards tearing may be built up before the parts of maximum resistance are reached.
  • Another object of this invention is to provide a Weakening line arrangement for removable portions of easy opening can ends wherein the uncontrolled rupturing of the can end due to gaseous pressure blow-off may be readily arrested and at the same time the resistance of the can end to rupture along the weakening line is not materially increased to the point where it is not practical.
  • Another object of this invention is to provide a weakening line in accordance with the foregoing wherein the weakening line is in the form of a score line, and the resistance to rupture due to internal gaseous pressure blowoff is controlled by a change in score line depth, a change in score line design, a change in score line contour, etc.
  • a further object of this invention is to make provisions in any easy opening can end of the type particularly adapted for use in the packaging of beverages under gaseous pressure to arrest the uncontrolled rupture of the can end along the weakening line formed therein due to internal gaseous pressure blow-off, arresting of the rupture due to blow-off being controlled simply by decreasing the depth of the score adjacent to, but spaced from, the starting portion of the score line and in transverse alignment whereby the effect of pressure upon the starting end of the removable portion of the can end will be to initially rupture the can end followed by a hinging or bending up of the released portion, and the reduce-d depth scored portions being relatively short and so spaced from the portion of the score line which is initially ruptured, whereby under normal conditions a sufficient rupturing momentum may be built up prior to the reaching of these parts of the score line to facilitate the ready manual tearing or rupturing of the can end along the score line portions of minimum depth.
  • FIGURE 1 is a top perspective view of a beverage can having formed as part thereof an easy opening can end incorporating the spirit of this invention.
  • FIGURE 2 is an enlarged fragmentary perspective view of the central portion of the can end of FIGURE 1 and shows the can end as it would appear after the initial rupturing of the can end due to an upwardly directed force on the associated pull tab followed by a further rupturing of the can end due to blow-off and wherein the further rupturing has been arrested.
  • FIGURE 3 is an enlarged fragmentary perspective view similar to FIGURE 2 and shows the can end as it appears after the normal initial rupturing thereof utilizing the pull tab.
  • FIGURE 4 is an enlarged fragmentary plan view showing schematically the score line arrangement of the can end.
  • FIGURE 5 is an enlarged fragmentary plan view along a portion of the score line which includes a part of maximum resistance to rupture.
  • FIGURE 6 is an enlarged fragmentary longitudinal sectional view taken along the line 66 of FIGURE and shows more clearly the variations in score line depths.
  • FIGURE -7 is an enlarged fragmentary transverse vertical sectional view taken along the line 7-7 of FIGURE 6 and shows the specific cross section of the score line throughout the major portion of the length thereof.
  • FIGURE 8 is an enlarged fragmentary transverse vertical sectional view taken along the line 88 of FIGURE 6 and shows the cross section of the score line through the blow-out arresting part thereof.
  • FIGURE 9 is an enlarged fragmentary vertical sectional view taken along the line 9-'9 of FIGURE 4 and shows the cross section of the score line of the starting part thereof.
  • FIGURE 1 a a can which is generally referred to by the numeral 10 and which is particularly adapted for the dispensing of liquids, particularly beverages.
  • The-can 10 includes a conventional can body 11 to which there is secured by means of a double seam 12 a can end 13 which is formed in accordance with this invention.
  • the illustrated can end 13 includes an end panel 14 in which a continuous score line 15 is formed to define a removable portion 16. When the removable portion 16 is removed from the can end 13, a suitable combined pour and vent opening is formed.
  • the removable portion 16 includes a starting end "17, an intermediate tear strip portion 18 and an enlarged terminal part 19.
  • the score line 15 includes a starting portion which extends generally around the starting part 17 of the removable portion 16.
  • the starting portion 20 of the score line flows into a normal score line portion 21 which extends along the tear strip portion 18 and the enlarged terminal part 19 of the removable portion 16.
  • the normal score line portion 21 is interrupted intermediate the ends of the tear strip portion 18 by two transversely aligned score line portions 22 which are for the purpose of arresting any uncontrolled rupture of the score line 15 due to a blow-out of the contents of the can 10 after the initial rupture of the end panel along the starting portion 20 of the score line 15.
  • the specific details of the score line '15 will be described hereinafter.
  • the removable portion 16 is provided at the starting end 17 thereof with an upstanding integral rivet 23.
  • the rivet 23 is utilized for the purpose of securing a pull tab 24 to the removable portion 16. After the pull tab 24 has been passed over the rivet 23, the rivet 23 is upset to define an enlarged head 25 which securely clamps the pull tab 24 in place.
  • the score line 15 is of a constant width throughout the length of the score line, the score line varies in depth.
  • the starting portion 20 of the score line is of a maximum depth, as is illustrated in FIGURE 9.
  • the normal score line portion 21 is of an average depth.
  • the score line part 22 is of a very shallow depth.
  • the specific details of the score line 15 along the tear strip part 18 of the removable portion 16 are clearly shown in FIGURES 5 and 6. This clearly shows the score line 15 to be of a constant width.
  • the blow-out arresting part 22 of the score line 15 is much shallower than the normal score line portion 21, it is wider at the base. Accordingly, since the die for forming all of the score line 15 is of the same taper, it will be seen that the base of the score line part 22 is much wider than the base of the score line portion 21.
  • FIGURE 3 it will be seen that when the can 10 is opened in the normal manner by exerting an upwardly directed pressure on the end of the pull tab 24 remote from the rivet 23, the end panel 14- will be ruptured along the starting portion 20 of the score line 15. This initial rupturing of the end panel 14 will be for a relatively short distance and will normally terminate short of the score line part 22. On the other hand, if there is excessive pressure within the can 10 and there is a tendency for the pressurized gas and possibly portions of the contents of the can 10 to blow out through the opening formed upon the initial rupturing of the end panel 14, it will be seen that the starting end 17 of the removable portion 16 will be blown upwardly and there will be momentary uncontrolled rupturing of the end panel 14 along the score line 15.
  • the score line parts 22 are of minimum depth, as is shown in FIGURE 8, the uncontrolled rupturing of the end panel 14 along the score line 15 will momentarily halt and there will be an upward hinging of that part of the removable portion 16 which has torn free of the end panel 14, as is shown generally in FIGURE 2.
  • the minimum depth parts 22 of the score line 15 function as means for preventing the uncontrolled rupturing of the end panel 14 along the score line 15 due to blow off.
  • the tearing force by blowoif pressure is not as great as that which can be exerted by one conveniently pulling on the pull tab 24. Accordingly, even if initial rupture due to blow-off does occur and the end panel 14 is ruptured to the extent shown in FIGURE 2, the controlled continued rupture of the end panel 14 along the score line 15 can be readily accomplished. Furthermore, since the initial rupture of the end panel 14 is only along the starting portion 20 of the score line under normal opening conditions, as is shown in FIGURE 3, when the pull tab 24 is gripped for tearing out the removable portion 16 in the normal manner, the initial tearing will be along the normal depth score line portion 21 so that a tearing inertia may be attained before the score line parts 22 of maximum resistance are reached. Because of this inertia of tearing, the removable portion 16 may be readily torn from the end panel 14 notwithstanding the function of the tear line parts 22 to prevent uncontrolled blow out of the removable portion 16.
  • a can end of the easy opening type particularly adapted for the dispensing of a product which may be under gaseous pressure said can end including an end panel having a portion defined by a weakening line and being removable to define a dispensing opening, said removable portion having a starting end defined by a starting weakening line portion along which said end panel is initially ruptured in the removal of said removable portion, said weakening line including other portions extending from said starting weakening line portion and including parts of maximum resistance whereby when said end panel is initially ruptured and uncontrolled continued rupture of said end panel along said weakening line due to gaseous pressure on said removable portion occurs said parts of maximum resistance will resist and stop the uncontrolled rupture.
  • a can end of the easy opening type particularly adapted for the dispensing of a product which may be under gaseous pressure said can end including an end panel having a portion defined by a weakening line and being removable to define a dispensing opening, said removable portion having a starting end defined by a starting weakening line portion along which said end panel is initially ruptured in the removal of said removable portion, said removable portion including a tear strip portion defined by intermediate weakening line portions, and said intermediate weakening line portions each including a weakening line part of maximum resistance whereby when said end panel is initially ruptured and uncontrolled continued rupture of said end panel along said weakening line due to gaseous pressure on said removable portion occurs said parts of maximum resistance will resist and stop the uncontrolled rupture.
  • a can end of the easy opening type particularly adapted for the dispensing of liquids packaged under gaseous pressure said can end including an end panel of which a portion is defined by a weakening line and being readily removable to define a pour opening, said removable portion including a starting end to which a pull tab may be secured, an enlarged terminal part and an intermediate strip part, the portions of said weakening line defining said strip part including parts of maximum resistance whereby when said end panel is initially ruptured and uncontrolled continued rupture of said end panel along said weakening line due to gaseous pressure on said removable portion occurs, said parts of maximum resistance will resist and stop the uncontrolled rupture.
  • a can end of the easy opening type particularly adapted for the dispensing of a product which may be under gaseous pressure said can end including an end panel having a portion defined by a weakening line and being removable to define a dispensing opening, said removable portion having a starting end defined by a starting weakening line portion along which said end panel is initially ruptured in the removal of said removable portion and a terminal portion, and said end panel having means intermediate said starting weakening line portion and said terminal portion for resisting the normal tearing of said can end along said weakening line and preventing the uncontrolled continued rupture of said end panel along said weakening line due to gaseous pressure on said removable portion.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
  • Packages (AREA)
  • Closures For Containers (AREA)
US354663A 1964-03-25 1964-03-25 Can end for easy opening beverage cans Expired - Lifetime US3272381A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US354663A US3272381A (en) 1964-03-25 1964-03-25 Can end for easy opening beverage cans
DE19641432133 DE1432133A1 (de) 1964-03-25 1964-08-18 Behaelterdeckel od.dgl. Behaelterteil mit einem durch Schwaechungslinie begrenzten aufreissbaren Abschnitt
FR996467A FR1414661A (fr) 1964-03-25 1964-11-26 Extrémité de boîte, pour boîtes de boissons en conserve à ouverture facile
AT70365A AT253413B (de) 1964-03-25 1965-01-27 Behälterdeckel od. dgl. Behälterteil mit einem durch Schwächungslinie begrenzten, aufreißbaren Abschnitt
BE661348D BE661348A (de) 1964-03-25 1965-03-19
NL6503717A NL6503717A (de) 1964-03-25 1965-03-24

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US354663A US3272381A (en) 1964-03-25 1964-03-25 Can end for easy opening beverage cans

Publications (1)

Publication Number Publication Date
US3272381A true US3272381A (en) 1966-09-13

Family

ID=23394393

Family Applications (1)

Application Number Title Priority Date Filing Date
US354663A Expired - Lifetime US3272381A (en) 1964-03-25 1964-03-25 Can end for easy opening beverage cans

Country Status (5)

Country Link
US (1) US3272381A (de)
AT (1) AT253413B (de)
BE (1) BE661348A (de)
DE (1) DE1432133A1 (de)
NL (1) NL6503717A (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3425590A (en) * 1966-03-02 1969-02-04 Metal Box Co Ltd Can end having removable strip
US3428210A (en) * 1966-07-15 1969-02-18 Fraze Ermal C Can end with off center rivet
US3458080A (en) * 1968-01-31 1969-07-29 American Flange & Mfg Closure tear out panels
US4185576A (en) * 1977-09-12 1980-01-29 National Can Corporation Apparatus for forming tamper-proof closures
EP0040277A1 (de) * 1980-05-21 1981-11-25 Toyo Seikan Kaisha Limited Leicht zu öffnender Dosendeckel mit einem Zugring
EP0050713A1 (de) * 1980-10-24 1982-05-05 The Continental Group, Inc. Schwächungslinie mit abnehmender Kerbtiefe eines leicht zu öffnenden Dosenverschlusses
EP0074223A1 (de) * 1981-09-03 1983-03-16 STOLLE RESEARCH & DEVELOPMENT CORPORATION Spannungsvermindernde Ausbildung eines nicht entfernbaren Aufreissstreifen mit Grifflasche an einem leicht zu öffnenden Dosenende
US20100294812A1 (en) * 2006-12-22 2010-11-25 Portola Packaging, Inc Internal container bore mount fitment

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3005573A (en) * 1959-10-08 1961-10-24 Victor C D Dawson Blowout diaphragm
US3034680A (en) * 1960-05-31 1962-05-15 Herbert L Steinberg Closure

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3005573A (en) * 1959-10-08 1961-10-24 Victor C D Dawson Blowout diaphragm
US3034680A (en) * 1960-05-31 1962-05-15 Herbert L Steinberg Closure

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3425590A (en) * 1966-03-02 1969-02-04 Metal Box Co Ltd Can end having removable strip
US3428210A (en) * 1966-07-15 1969-02-18 Fraze Ermal C Can end with off center rivet
US3458080A (en) * 1968-01-31 1969-07-29 American Flange & Mfg Closure tear out panels
US4185576A (en) * 1977-09-12 1980-01-29 National Can Corporation Apparatus for forming tamper-proof closures
EP0040277A1 (de) * 1980-05-21 1981-11-25 Toyo Seikan Kaisha Limited Leicht zu öffnender Dosendeckel mit einem Zugring
EP0050713A1 (de) * 1980-10-24 1982-05-05 The Continental Group, Inc. Schwächungslinie mit abnehmender Kerbtiefe eines leicht zu öffnenden Dosenverschlusses
EP0074223A1 (de) * 1981-09-03 1983-03-16 STOLLE RESEARCH & DEVELOPMENT CORPORATION Spannungsvermindernde Ausbildung eines nicht entfernbaren Aufreissstreifen mit Grifflasche an einem leicht zu öffnenden Dosenende
US20100294812A1 (en) * 2006-12-22 2010-11-25 Portola Packaging, Inc Internal container bore mount fitment

Also Published As

Publication number Publication date
AT253413B (de) 1967-04-10
BE661348A (de) 1965-07-16
DE1432133A1 (de) 1969-12-04
NL6503717A (de) 1965-09-27

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