US3250425A - Rotatable pull tab to break scored tear strip - Google Patents

Rotatable pull tab to break scored tear strip Download PDF

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Publication number
US3250425A
US3250425A US345434A US34543464A US3250425A US 3250425 A US3250425 A US 3250425A US 345434 A US345434 A US 345434A US 34543464 A US34543464 A US 34543464A US 3250425 A US3250425 A US 3250425A
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US
United States
Prior art keywords
pull tab
projection
end panel
removable portion
container element
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
US345434A
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English (en)
Inventor
Frederick J Stec
John B Nicholson
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 US345434A priority Critical patent/US3250425A/en
Priority to AT1107464A priority patent/AT247785B/de
Priority to BE659885D priority patent/BE659885A/xx
Application granted granted Critical
Publication of US3250425A publication Critical patent/US3250425A/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
    • 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 can ends of the easy opening type, and more particularly to a can end having means for facilitating the initial rupture of the end panel thereof as the first step in the tearing out of a removable portion of the end panel.
  • the customary easy opening can end presently in use is provided with a pull tab which is secured in place by means of a rivet formed integrally with the removable, portion of the can end.
  • the mounting of a pull tab on such a can end meets with two conflicting requirements.
  • the pull tab In the first place, the pull tab must be so configurated and so mounted whereby it may be lifted to apply the initial rupturing force ,on the end panel.
  • the pull tab must be sufiiciently recessed within the can end so as to not in any way interfere with the handling of the can end and the can of which it is a part.
  • the pull tab While it is desirable that the pull tab be, for all practical purposes, held in pressure contact with the end panel of an associated can end, it is also necessary that means he provided for facilitating the lifting of the pull tab to effect the initial rupture of the can end along the score line defining the removable portion thereof. Numerous tests have been conducted and on an average it has been found that 14 inch pounds of force is required to effect the initial rupture of the end panel of a can end utilized in the packaging of beer. Since the average pull tab has an effective length of one inch, it will be readily apparent that a lifting force of approximately 14 pounds must be exerted on the free end of the pull tab.
  • the pull tab is preferably tightly clamped against the surface of the end panel, it will be seen that for all practical purposes one must place his of her fingernail beneath the free end of the pull tab and exert an upward force of 14 pounds therewith. This is very diflicult for many people to do. Furthermore, since often times the pull tab is provided with a raw edge, if ones fingers slips, during the opening process, a cut finger will result.
  • a can end of the easy opening type which includes a removable portion having attached thereto a pull tab in a manner whereby limited pivoting of the pull tab is permitted, the pull tab being normally disposed tightly against the upper surface of the end panel of the can end and the end panel being provided with a ramp-like projection generally aligned with the axis of the removable portion whereby when the pull tab is rotated, it will ride up on the ramp portion without any other lifting force being directed thereupon and will automatically effect the initial rupture of the end panel along the score line defining the removable portion.
  • Another object of this invention is to provide in an easy opening can end of the type including a pull tab mounted for pivotal movement means for automatically lifting the pull tab when it is pivoted whereby a sufiicient upwardly directed force is applied to the pull tab to effect the rupture of the can end along a weakening line thereof and at the same time the pull tab is held in an elevated posit-ion whereby it may be readily gripped to effect a tearing out operation on a removable portion of the can end to which the pull tab is secured.
  • Another object of this invention is to provide a novel can end of the easy opening type which includes a pull tab for facilitating the opening thereof, the can end being so constructed whereby the pull tab is normally tightly clamped against the upper surface of the end panel of the can end and when the pull tab is rotated into alignment with the removable portion of the can end to which the pull tab is attached, an upward movement of the pull tab is effected and an initial rupture of the end panel will occur.
  • a f-unther object of this invention is to facilitate the opening of existing types of easy opening containers by the provision of the end panel of each can end with a projection of the ramp type wherein when an associated pull tab is pivoted about a rivet securing the same to a removable portion of the can end, the pull tab will automatically be elevated and an initial rupture of the can end will occur.
  • a still further object of this invention is to provide an easy opening can end of the type which includes a pull tab for facilitating the opening thereof, the can end being so constructed whereby the pull tab may be readily lifted without applying a lifting force thereto, and the pull tab, after it has been lifted suificiently to eifect an initial rupture of the end panel will be held in an elevated position to facilitate the gripping thereof in a manner whereby the pull tab may then be utilized for the tearing of a removable portion of the can end therefrom.
  • FIGURE 1 is a top perspective View of an easy opening can formed in accordance with this invention and shows the specific details of the easy opening can end thereof.
  • FIGURE 2 is a top perspective view similar to FIG- URE 1 and shows the pull tab of the can end rotated to a position wherein initial rupture of the end panel of the can end occurs.
  • FIGURE 3 is an enlarged fragmentary vertical sectional View taken along the line 33 of FIGUREZ and shows specifically the details of the can end construction for elfectingthe lifting of the pull tab when the pull tab is rotated and the resultant initial rupturing of the end panel.
  • FIGURE 4 is an enlarged fragmentary transverse vertical sectional view taken along the line 44 of FIG- URE 3 and shows specifically the relationship of the pull tab and a projection of the ramp type formed in the end panel to effect the lifting of the pull tab when the pull tab is rotated.
  • the can 5 includes a conventional can body 6 to which there has been attached by means of a double seam 7 an easy opening can end which is .generally referred to by the numeral 8.
  • the can end 8 for the most part is of a conventional construction and includes an end panel 9.
  • the end panel 9 has a removable portion 10 which is defined by a score line 1-1.
  • the removable portion 10 includes a starting part 12 which is provided with an integral rivet 13. The rivet 13 is utilized to secure a pull tab 14 to the starting part 12.
  • the can end 8 as described above incorporates conventional features and is difiicult to open.
  • the pull tab 14 In order that the pull tab 14 in no way interferes with any operation to be performed in either the making of the can 5, the filling of the can 5 or the closing thereof, it is necessary that the pull tab 14 be clamped tightly against the upper surface of the end panel 9. On the other hand, it is necessaryto lift the pull tab 14 in order to effect an initial rupture of the end panel 9 along the score line 11 immediately adjacent the rivet 13. It will be readily apparent that if the pull tab 14 is tightly clamped against the end panel 9, it will be extremely difficult to exert a lifting force on the pull tab 14 with ones finger.
  • the pull tab 14 is initially disposed at an angle to the axis of the removable p-o'trion 10 with the illustrated angle of FIGURE 1 being approximately 90 degrees to the axis of the removable portion v10.
  • the end panel 9 is then modified to be provided with an upwardly directed projection 15.
  • the projection 15 has an arcuate outline with its center being generally the axis of the rivet 13.
  • the projection 15, as is best illustrated in FIGURE 4, is provided at the opposite ends thereof with upwardly sloping ramps 16.
  • the pull tab 14 will have no exposed surfaces which may be engaged by ones fingers during the pivoting of the pull tab. Furthermore, as pointed out above, the pull tab remains in an elevated position after the initial rupture of the end panel 9 so that the pull tab 14 may be firmly gripped for the purpose of completing the removal of the removable portion 10.
  • a further obvious advantage of the can end and pull tab arrangement is that since the pull tab does not have to be lifted whatsoever, it may be clamped fiat against the upper surface of'the end panel 9 and thus there is no problem of the pull tab undesirably engaging the machinery utilized in applying the can end 8 to the can body 6 or the machinery for handling, filling and closing the can 5.
  • An easy opening container element having a removable portion defined by a weakening line, said removable portion including a starting portion, a pull tab, a fastener securing said pull tab to said starting portion for effecting the rupture of said container element along said weakening line and for limit-ed pivotal movement of said pull tab, and said container element having a projection disposed radially outwardly of said weakening line in the path of pivotal movement of said pull tab and adapted to be engaged by said pull tab, said projection including a terminal ramp generally opposing said pull tab whereby when said pull tab is pivoted against said projection, said pull tab will ride up said ramp and onto said projection thereby placing a lifting force on said starting portion through said fastener sufiicient to effect an initial rupture of the container element.
  • a container end of the easy opening type comprising an end panel and an upstanding surrounding seam forming portion, said end panel having a removable por tion defined by a weakening line, said removable portion including a starting portion, a pull tab fully seated within said container end, a fastener securing said pull tab to said starting portion for pivotal movement, said end panel having a projection disposed radially outwardly of said weakening line in the path of pivotal movement of said pull tab, said projection including a terminal ramp generally opposing said pull tab whereby when said pull tab is pivoted against said projection said pull tab will ride up said ramp and onto said projection thereby lifting said pull tab and placing a lifting force on said starting portion through said fastener sufiicient to effect an initial rupture of said end panel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
US345434A 1964-02-17 1964-02-17 Rotatable pull tab to break scored tear strip Expired - Lifetime US3250425A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US345434A US3250425A (en) 1964-02-17 1964-02-17 Rotatable pull tab to break scored tear strip
AT1107464A AT247785B (de) 1964-02-17 1964-12-30 Aufreißvorrichtung an Behälterdeckeln
BE659885D BE659885A (da) 1964-02-17 1965-02-17

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US345434A US3250425A (en) 1964-02-17 1964-02-17 Rotatable pull tab to break scored tear strip

Publications (1)

Publication Number Publication Date
US3250425A true US3250425A (en) 1966-05-10

Family

ID=23355034

Family Applications (1)

Application Number Title Priority Date Filing Date
US345434A Expired - Lifetime US3250425A (en) 1964-02-17 1964-02-17 Rotatable pull tab to break scored tear strip

Country Status (3)

Country Link
US (1) US3250425A (da)
AT (1) AT247785B (da)
BE (1) BE659885A (da)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3370744A (en) * 1965-11-22 1968-02-27 Gontar Herbert Can opener
US3446390A (en) * 1968-04-10 1969-05-27 Aluminum Co Of America Opening means for sealed containers
US5131555A (en) * 1991-11-12 1992-07-21 Demars Robert A Beverage container opening top
US5224618A (en) * 1992-06-22 1993-07-06 Garbiso Michael J Easy opening tab for container
US5248053A (en) * 1990-02-02 1993-09-28 Lundgren James F Operating lever for beverage container lever operated opener
US5456378A (en) * 1993-07-01 1995-10-10 Demars; Robert A. Container opening apparatus
US20070068943A1 (en) * 2005-09-23 2007-03-29 Crown Packaging Technology Inc. Sealing device for a container
US20070262079A1 (en) * 2006-05-10 2007-11-15 Alexandre Paris Opening device
US20080110887A1 (en) * 2006-10-31 2008-05-15 Christopher Paul Ramsey Resealable closure
US20090173737A1 (en) * 2007-11-09 2009-07-09 Crown Packaging Technology, Inc. Resealable beverage can end and methods relating to same
US20100294768A1 (en) * 2009-05-22 2010-11-25 Crown Packaging Technology, Inc. resealable beverage can ends
US20110233227A1 (en) * 2006-10-31 2011-09-29 Alexandre Paris Resealable closure
US8215513B1 (en) 2007-08-20 2012-07-10 Popseal LLC. Self-closing resealable can end
WO2014149484A1 (en) 2013-03-15 2014-09-25 Ball Corporation Easy access opening tab for a container end closure
US9181007B2 (en) 2013-03-12 2015-11-10 Rexam Beverage Can Company Beverage can end with vent port
US20190177034A1 (en) * 2016-08-22 2019-06-13 Toyo Seikan Co., Ltd. Can lid

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2029328A (en) * 1932-02-12 1936-02-04 Transitoria Ab Container

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2029328A (en) * 1932-02-12 1936-02-04 Transitoria Ab Container

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3370744A (en) * 1965-11-22 1968-02-27 Gontar Herbert Can opener
US3446390A (en) * 1968-04-10 1969-05-27 Aluminum Co Of America Opening means for sealed containers
US5248053A (en) * 1990-02-02 1993-09-28 Lundgren James F Operating lever for beverage container lever operated opener
US5131555A (en) * 1991-11-12 1992-07-21 Demars Robert A Beverage container opening top
EP0542517A1 (en) * 1991-11-12 1993-05-19 Original Ideas Inc. Beverage container opening top
US5224618A (en) * 1992-06-22 1993-07-06 Garbiso Michael J Easy opening tab for container
WO1994000353A1 (en) * 1992-06-22 1994-01-06 Michael Joseph Garbiso Easy opening tab for container
US5456378A (en) * 1993-07-01 1995-10-10 Demars; Robert A. Container opening apparatus
US8336725B2 (en) 2005-09-23 2012-12-25 Crown Packaging Technology, Inc. Sealing device for a container
US20070068943A1 (en) * 2005-09-23 2007-03-29 Crown Packaging Technology Inc. Sealing device for a container
US20090179033A1 (en) * 2006-05-10 2009-07-16 Crown Packaging Technology , Inc. Can opening device
US20070262079A1 (en) * 2006-05-10 2007-11-15 Alexandre Paris Opening device
US7918359B2 (en) 2006-05-10 2011-04-05 Crown, Packaging Technology, Inc. Opening device
US20080110887A1 (en) * 2006-10-31 2008-05-15 Christopher Paul Ramsey Resealable closure
US20110233227A1 (en) * 2006-10-31 2011-09-29 Alexandre Paris Resealable closure
US8240498B2 (en) 2006-10-31 2012-08-14 Crown Packaging Technology, Inc. Resealable closure
US8215513B1 (en) 2007-08-20 2012-07-10 Popseal LLC. Self-closing resealable can end
US8931656B2 (en) 2007-11-09 2015-01-13 Crown Packaging Technology, Inc. Resealable beverage can end and methods relating to same
US20090173737A1 (en) * 2007-11-09 2009-07-09 Crown Packaging Technology, Inc. Resealable beverage can end and methods relating to same
US8336726B2 (en) 2007-11-09 2012-12-25 Crown Packaging Technology, Inc. Resealable beverage can end and methods relating to same
US20100294768A1 (en) * 2009-05-22 2010-11-25 Crown Packaging Technology, Inc. resealable beverage can ends
US8833585B2 (en) 2009-05-22 2014-09-16 Crown Packaging Technology, Inc. Resealable beverage can ends
US9181007B2 (en) 2013-03-12 2015-11-10 Rexam Beverage Can Company Beverage can end with vent port
WO2014149484A1 (en) 2013-03-15 2014-09-25 Ball Corporation Easy access opening tab for a container end closure
US9033174B2 (en) 2013-03-15 2015-05-19 Ball Corporation Easy access opening tab for a container end closure
US20190177034A1 (en) * 2016-08-22 2019-06-13 Toyo Seikan Co., Ltd. Can lid

Also Published As

Publication number Publication date
BE659885A (da) 1965-08-17
AT247785B (de) 1966-06-27

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