US3612341A - Wire formed pull-tab - Google Patents

Wire formed pull-tab Download PDF

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Publication number
US3612341A
US3612341A US863940A US3612341DA US3612341A US 3612341 A US3612341 A US 3612341A US 863940 A US863940 A US 863940A US 3612341D A US3612341D A US 3612341DA US 3612341 A US3612341 A US 3612341A
Authority
US
United States
Prior art keywords
panel
loop
score
plane
end panel
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
US863940A
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English (en)
Inventor
Jozef Tadeusz Franek
Peter Rhodes
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 UK Ltd
Original Assignee
Metal Box PLC
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 Metal Box PLC filed Critical Metal Box PLC
Application granted granted Critical
Publication of US3612341A publication Critical patent/US3612341A/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
    • B65D17/4011—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

  • An easy-opening can end having an end panel in which a single panel-opening score is spaced from the periphery of the panel and extends completely around the panel is provided with a pull-tab consisting of a length of wire which is bent to provide a finger loop with the end portions of the wire juxtaposed and extending outwards from the loop to form a scorerupturing member and the tab is secured to the end panel at a position adjacent to the inner end of the score rupturing member and inside the panel-opening score in a manner such that on raising the finger loop from the end panel the outer end of the score-rupturing member effects rupturing of the score.
  • SHEET 1 [IF 6 Inventors JOZEF T- FRANEK PETER RHODES By A Uomeys UCHZIQYI SHEET 2 UF 6 Inventors J'DZEF T FRANEK PETER RHODES By 9W, M M Attorney;
  • This invention relates to can ends made of sheet metal, for example of tinplate, and in particular to a can end of the kind known as easy opening, that is one which includes an end panel scored to facilitate opening and which is provided with a pull tab by which opening is effected, the pull tab being at tached to the can end by means of welding, soldering, brazing, or cementing.
  • An easy opening can end must be such as to withstand processing temperatures and pressures encountered in a can to which it is fitted and for this purpose the end panel thereof must be of a suitable shape and must not be adversely affected by the attachment of the pull tab thereto. 'lhus, tab attaching methods such as riveting may not be suitable because such methods may adversely affect the performance of the can end. if the can end is used with a can containing food, the method by which the pull tab is attached to the end panel must not disturb the internal protective coatings.
  • the joint between the end panel and the pull tab must be strong enough to withstand the forces required for rupturing the panel along a portion of the opening score; the addition of the score must not adversely affect the performance of the can end; and the pull tab must be preformed to maintain a functional relationship with the shape of the end panel, and to provide linger access to permit the loop of the tab to be lifted.
  • a sheet metal can end comprising an end. panel provided with a single panelopening score spaced from the periphery of the panel and extending completely therearound, and a pull tab overlying the end panel and consisting of a length of wire which is bent to a shape providing a finger loop with end portions of the wire juxtaposed and extending outwardly from the loop to form a score-rupturing member, said tab being secured to the end panel at a position adjacent to the inner end of said member within the panel-opening score and having the outer end of the member closely adjacent to a portion of the panel opening score to effect rupturing thereof on raising of the finger loop from the panel-overlying position thereof.
  • ll is a top plan of a circular can end according to the invention
  • Ill is a section through a part of a can having the can end of hit ⁇ . ll fitted thereto,
  • hit ⁇ . 3 is a top plan of the pull tab applied to the can end of f ll ll,
  • WU. d is a side elevation of Fit 3
  • ii is an end view loolring in the direction of arrow V, lFll G.
  • Ell-S. is a perspective view illustrating the mode of opening the can end
  • l is a top plan similar to that of i6. ll but illustrates an alternative form of pull tab applied to the can end,
  • lFlG. ill is a longitudinal section through the pull tab applied to the can end ot'i lG. ll,
  • i2 is a section through lFlG. ill.
  • iii to ilh are top plan views of alternative forms of can end according to the invention.
  • a circular can end is made of sheet tinplate, or other suitable sheet metal such as aluminum, and comprises an end panel l which is provided with a single panel-opening score 2 which is spaced from the periphery of the panel and extends therearound.
  • an annular bead It is formed in the panel 1 within the score 2 and is spaced from the score 2 to be upstanding from the plane of the outer face of the panel ll.
  • the end panel l is bounded by a seam-forming flange 4, FIG. l1, by which the can end is seamed to a can body 5, H68.
  • a pull tab overlies the end panel ii and consists of a length of wire of circular cross section, see H6. 2 which is bent to form a finger loop 7 with the end portions of the wire juxtaposed to form a score-rupturing member l which extends outwardly from the loop 7.
  • the juxtaposed end portions are located on opposite sides of the plane of symmetry 9, H6. 1, of the pull tab and extend from straight loop portions it]! which are substantially at right angles to said plane.
  • the pull tab is bonded to the end panel at the junction between the head 3 and the portion of the end panel extending between the bead and the score 2 and at a position adjacent to the inner end.
  • the extreme end portions 113 lid of the member d are directed towards each other obliquely to the plane of symmetry 9 and abut each other to present a sharp edge to the score 2.
  • the end portions id, M are directed at an angle of 45 to the plme ll.
  • the sharp edge of the member 8 is closely adjacent to a portion of the panel-opening score 2 to effect rupturing of the score 2 on raising of the loop 7 from the panel overlying position thereof.
  • the pull tab is secured along the straight loop portions llll.
  • the loop portions litl are connected to the sides of the loop by cranks so that the sides of the loop are well clear of the can end.
  • V-shaped bends lid are tormed in the sides of the loop to rest against the end panel l and retain the end portion if of the pull tab joining the bends llti spaced from the end panel l, to facilitate the insertion of a finger into the loop under the end portion l7.
  • llG. fl illustrates a modification to the can end described above which the pull tab is described with reference to lFlGS. to but the score 2 is formed in the head 3 which is of substantially conical form, the score 2 being located substantially at the apex of the cone which is defined by a relatively short planar steep portion 3a and a longer but less steep planar portion 35b to which the portions Ml of the pull tab are secured as described above.
  • FIGS. 9 to 12 illustrate a can end similar to that of FIGS. 1 and 2 but the pull tab is of a modified kind.
  • the end portions 13, 14 of the member 8 extend at right angles to the portions and abut along the plane 9 of symmetry of the pull tab.
  • the pull tab is bent as at 20, FIGS. 10 and 11, so as to conform substantially to the shape of the bead 3 and the end portions 17 of the pull tab furthermost from the member 8 is bent upwards from the end panel 1 to facilitate the insertion of a finger into the loop under the end portion 17.
  • the rupturing member 8 is bent lengthwise thereof so that the free tip of the member 8 projects as shown at T, FIG. 11, below the plane P of the face of the loop 7 which lies on the end panel 1.
  • the mode of rupturing the score 2 is illustrated in FIG. 12 and is as described above with reference to FIGS. 6 and 7.
  • FIGS. 13 to 16 illustrate other shapes of can-ends formed in accordance with the invention, FIGS. 13 and 14 being can ends of substantially rectangular shape and showing two different positions at which the pull tab can be located, FIG. 15 being a can end of substantially oval shape, and FIG. 16 being a can end of irregular shape.
  • FIGS. 13 to I6 are shown provided with a pull tab as described with reference to FIGS. 9 to l 1 it is to be understood that the can ends of FIGS. 13 to 16 can, if desired, be provided with pull tabs as described with reference to FIGS. 3 to 5.
  • a sheet metal can end comprising an end panel provided with a single panel-opening score spaced from the periphery of the end panel and extending completely therearound, and a pull tab comprising a wire of circular cross section bent to form a finger loop having sides which extend lengthwise of the plane of symmetry of the tab, straight portions bent from said sides towards each other, said straight portions terminating in end portions which have the cross section of the wire and are bent outwards away from the finger loop, said end portions being directed towards each other obliquely to said plane of symmetry and having abutting faces located substantially in said plane of symmetry thereby to form a sharp score-rupturing edge, said straight portions being directly bonded to said end panel at a position closely adjacent to a portion of the panel-opening score so that on raising of the finger loop from the end panel the score is ruptured by said score-rupturing edge.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
  • Cartons (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
US863940A 1968-10-07 1969-10-06 Wire formed pull-tab Expired - Lifetime US3612341A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB47466/68A GB1262278A (en) 1968-10-07 1968-10-07 Improvements in or relating to can ends

Publications (1)

Publication Number Publication Date
US3612341A true US3612341A (en) 1971-10-12

Family

ID=10445075

Family Applications (1)

Application Number Title Priority Date Filing Date
US863940A Expired - Lifetime US3612341A (en) 1968-10-07 1969-10-06 Wire formed pull-tab

Country Status (7)

Country Link
US (1) US3612341A (enrdf_load_stackoverflow)
BE (1) BE739671A (enrdf_load_stackoverflow)
DE (1) DE1950544A1 (enrdf_load_stackoverflow)
DK (1) DK125781B (enrdf_load_stackoverflow)
GB (1) GB1262278A (enrdf_load_stackoverflow)
NL (1) NL6915122A (enrdf_load_stackoverflow)
NO (1) NO125623B (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3730381A (en) * 1971-03-02 1973-05-01 Metal Box Co Ltd Can end opening means
US3799390A (en) * 1971-12-21 1974-03-26 Reynolds Metals Co Easy open end closure
US3858754A (en) * 1973-10-29 1975-01-07 Nat Can Corp Container end with pre-bulge
EP0078625A1 (en) * 1981-10-19 1983-05-11 Toyo Seikan Kaisha Limited Easily-openable heat seal lid
US20120273497A1 (en) * 2011-04-27 2012-11-01 Strickland Donald S Removable Membrane Having a Truncated Tab
ES2709215R1 (es) * 2019-03-20 2019-05-16 Valencia Juan Gonzalez Nueva lengüeta y anilla para la apertura de latas de bebidas

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3146905A (en) * 1962-11-15 1964-09-01 Ind Verwertungsprodukte Anstal Devices for opening the hermetically sealed cans
US3301432A (en) * 1964-03-13 1967-01-31 Continental Can Co Pull key opening can end
US3325043A (en) * 1964-05-06 1967-06-13 Continental Can Co Container closure
US3381847A (en) * 1965-03-04 1968-05-07 Fraze Ermal C Easy opening container with wire lever

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3146905A (en) * 1962-11-15 1964-09-01 Ind Verwertungsprodukte Anstal Devices for opening the hermetically sealed cans
US3301432A (en) * 1964-03-13 1967-01-31 Continental Can Co Pull key opening can end
US3325043A (en) * 1964-05-06 1967-06-13 Continental Can Co Container closure
US3381847A (en) * 1965-03-04 1968-05-07 Fraze Ermal C Easy opening container with wire lever

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3730381A (en) * 1971-03-02 1973-05-01 Metal Box Co Ltd Can end opening means
US3799390A (en) * 1971-12-21 1974-03-26 Reynolds Metals Co Easy open end closure
US3858754A (en) * 1973-10-29 1975-01-07 Nat Can Corp Container end with pre-bulge
EP0078625A1 (en) * 1981-10-19 1983-05-11 Toyo Seikan Kaisha Limited Easily-openable heat seal lid
US20120273497A1 (en) * 2011-04-27 2012-11-01 Strickland Donald S Removable Membrane Having a Truncated Tab
ES2709215R1 (es) * 2019-03-20 2019-05-16 Valencia Juan Gonzalez Nueva lengüeta y anilla para la apertura de latas de bebidas

Also Published As

Publication number Publication date
NL6915122A (enrdf_load_stackoverflow) 1970-04-09
NO125623B (enrdf_load_stackoverflow) 1972-10-09
GB1262278A (en) 1972-02-02
DK125781B (da) 1973-05-07
BE739671A (enrdf_load_stackoverflow) 1970-04-01
DE1950544A1 (de) 1970-04-23

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