US3869063A - Easy opening closure for containers - Google Patents

Easy opening closure for containers Download PDF

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Publication number
US3869063A
US3869063A US360010A US36001073A US3869063A US 3869063 A US3869063 A US 3869063A US 360010 A US360010 A US 360010A US 36001073 A US36001073 A US 36001073A US 3869063 A US3869063 A US 3869063A
Authority
US
United States
Prior art keywords
pull tab
closure
panel portion
panel
interlocking means
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
US360010A
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English (en)
Inventor
Kurt Himstedt
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.)
Ardagh Metal Packaging Germany GmbH
Original Assignee
Schmalback Lubeca AG
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 Schmalback Lubeca AG filed Critical Schmalback Lubeca AG
Application granted granted Critical
Publication of US3869063A publication Critical patent/US3869063A/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

  • ABSTRACT This disclosure relates to-an easy opening closure for containers of the type having a displaceable panel portion defined by a weakening line and wherein a pull tab is secured to the displaceable panel portion for effecting the rupture of the closure along the weakening line and the displacement of the panel portion thereof.
  • a pull tab is secured to the displaceable panel portion by means of securing means such as a rivet and is subject to turning so as to render the same ineffective.
  • the pull tab is interlocked with the displaceable panel portion by a simple punching operation which forms a projection on the underside of the pull tab and a like configurated socket in the panel portion receiving the projection.
  • This invention relates in general to new and useful improvements in easy opening closures for containers, and more particularly to a means for securing a pull tab against rotation about a securing rivet and thus maintaining the alignment of the pull tab with respect to the usual weakening line defining a displaceable panel portion.
  • the predetermined position is one wherein the nose of the pull tab has a specific relative position with respect to the weakening line formed in the closure.
  • a tongue-shaped punching has been provided in the pull tab on the edge of the opening of the pull tab receiving the rivet with the free end of the tongue-shaped punching having been bent downward.
  • the tongue-shaped punching comes to lie below the rivet head and is pressed into the upper side of the closure panel under high pressure during the setting of the rivet head. It has been found, however, that even with this type of turning security only relatively insignificant safety forces can be realized in that once again one has to depend on a large extent on a relative deformability of the materials of the pull tab and the closure panel.
  • pull tab with a generally horseshoe-shaped cut line defining an attaching lug receiving the rivet with the remainder of the pull tab being pivotal relative to the attaching lug. It has been known with this type of pull tab to provide semicircular recesses on opposite sides of the cut line together with a further semi-circular recess so as to define a circular recess into which a knob, shaped in the panel of the closure. can engage upon attachment of the pull tab to the closure panel. While this arrangement provides for better security against turning, the cost is relatively high since both the closure panel and the pull tab must be provided, each one by itself and prior to assembly, with deformations precisely synchronized with one another.
  • the difficulty of securing the pull tab against turning relative to the rivet is solved by forming in the areas of the pull tab which lie flatly against the upper side of the closure panel, a center punch marklike, joint deformation in the materials of the pull tab and the closure panel.
  • the proposed interlock against turning offers the possibility of the production of a deep, positive engagement of limited points of the pull tab with limited points of the closure panel. Since it is a matter of common deformation, the deformations in the pull tab and the closure panel engage with one another by way of a tight as possible seating and without any clearance, and thus increase the security force. Above all, this security against turning can be accomplished after the final attachment of the pull tab to the closure panel in the same machine so that separate processing steps on the closure panel and the pull tab are not required, and so that there will be no need to make certain that preformed pull tabs equipped with safety elements are utilized with closure panels provided with corresponding safety elements or features.
  • FIG. 1 is a fragmentary plan view of a container closure having secured thereto a pull tab and with the pull tab being locked against rotation relative to the securing rivet therefor in accordance with this invention.
  • FIG. 2 is a transverse sectional view on a large scale taken along the line II--lI of FIG. 1 and shows specifically the details of the invention.
  • an easy opening closure for containers which includes a removable or displaceable panel portion 1 defined by a weakening line 2 which is disposed adjacent the periphery of the closure.
  • the displaceable panel portion 1 is provided with an integral rivet 3 with which a pull tab 4 is attached to the displaceable panel portion. It is to be noted that portions of the pull tab surrounding the rivet 3 rest flatly against the surface of the displaceable panel portion 1.
  • the pull tab 4 illustrated in the drawings is shaped from sheet metal and has an annular gripping section 5 which is defined by outside and inside rolls 6 and 7, respectively.
  • the pull tab also includes an attaching section which is rigidly connected to the gripping section 5 and is in the form of an indentation which is defined by a peripheral shoulder 10.
  • the attaching portion of the pull tab is reinforced on opposite sides of the shoulder 10 by rolls 9 which constitute continuations of the rolls 6. Further, at the forward end of the pull tab there is a projection 8 which generally terminates in a nose overlying and aligned with the weakening line 2.
  • a generally U- shaped or horseshoe-shaped cut line is formed with the ends thereof facing the projection 8 and terminating in rounded ends 12a.
  • the out line 12 defines an attaching lug in which the customary opening for receiving the rivet 3 isprovided.
  • the pull tab may be hinged relative to the rivet along a fold line extending between the rounded ends 12a with the pull tab functioning as a rigid lever for forcing the nose projection 8 down against the closure panel along the weakening line so as to effect rupture of the closure panel along the weakening line.
  • the means for preventing turning of the pull tab relative to the rivet is in the form of a two common deformations 13, 14, in the bottom 11 of the pull tab and in the metalof the closure panel 1, with the two common deformations being essentially diametrically opposed to one another with respect to the axis of the rivet 3.
  • the indentations are stamped jointly in both the pull tab and the closure panel with the result that they firmly engage one another in atight fit.
  • a positive connection between the material of the pull tab and the material of the closure panel will be achieved. Also, this can be accomplished after the position of the pull tab relative to the closure panel has been assured.
  • the deformations 13, 14 are placed transversely across the out line 12 without interference with the cut line 12. It is also to be noted that the cut line will extend into the cup shaped portion of the deformation 13 or 14 and thus increase the interlocking between the pull tab and the closure panel by pressing into the deformation 16 of the closure panel.
  • An easy opening closure for containers comprising a panel, at least one weakening line in said panel defining a displaceable panel portion, a pull tab for effecting the rupture of said panel along said weakening line and the displacement of said panel portion, means securing said pull tab to said panel portion with a part of said pull tab lying flatly against said panel portion, and interlocking means of the projection and socket type in said pull tab part and said panel portion for preventing rotational movement of said pull tab relative to said panel portion about said securing means, said interlocking means having the appearance of being simultaneously formed, said pull tab having a nose generally alignable with said weakening line and a grip portion, said nose and said grip portion being disposed on opposite sides of said securing means, and said interlocking means being disposed between a center of said securing means and said nose and projection being on said pull tab part and said socket being in said panel portion wherein said interlocking means are more forcibly engaged when said grip portion is moved away from said panel portion in a container opening operatron.
  • said pull tab includes an integral lug in part separated from the remainder of said pull tab by a out line defining a hinge between said lug and the remainder of said pull tab facilitating pivoting of said pull tab relative to said panel portion, and at least a part of said projection being formed in said lug.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
US360010A 1972-06-13 1973-05-14 Easy opening closure for containers Expired - Lifetime US3869063A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE7222042 1972-06-13

Publications (1)

Publication Number Publication Date
US3869063A true US3869063A (en) 1975-03-04

Family

ID=6630898

Family Applications (1)

Application Number Title Priority Date Filing Date
US360010A Expired - Lifetime US3869063A (en) 1972-06-13 1973-05-14 Easy opening closure for containers

Country Status (4)

Country Link
US (1) US3869063A (enrdf_load_stackoverflow)
CA (1) CA994689A (enrdf_load_stackoverflow)
FR (1) FR2187621B1 (enrdf_load_stackoverflow)
GB (1) GB1428441A (enrdf_load_stackoverflow)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3952913A (en) * 1974-11-18 1976-04-27 Continental Can Company, Inc. Tab anti-rotation and hold down device
US3984025A (en) * 1974-11-18 1976-10-05 Continental Can Company, Inc. Tab anti-rotation and hold down device
USD285415S (en) 1983-04-26 1986-09-02 Metal Box P.L.C. Closure for container or the like
USD285661S (en) 1983-04-26 1986-09-16 Metal Box P.L.C. Container closure
WO2004041666A1 (es) * 2002-11-07 2004-05-21 Mivisa Envases, S.A.U. Tapa de fácil apertura
US20150129596A1 (en) * 2012-07-09 2015-05-14 Silgan Containers Llc Can End and Related Method
USD731887S1 (en) 2013-03-14 2015-06-16 Crown Packaging Technology, Inc. Vented beverage can end
US9162795B2 (en) 2010-04-28 2015-10-20 Crown Packaging Technology, Inc. Beverage container lid with mouth opening and separate push in vent
US9403628B2 (en) 2013-03-14 2016-08-02 Crown Packaging Technology, Inc. Vented beverage can and can end
US10246229B2 (en) 2013-03-14 2019-04-02 Crown Packaging Technology, Inc. Vented beverage can and can end

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4210257A (en) * 1979-06-21 1980-07-01 American Can Company Fracture and tear-resistant retained tab
JPS60157616U (ja) * 1984-03-29 1985-10-21 東洋製罐株式会社 開口容易な蓋体
BE1005750A4 (nl) * 1992-03-20 1994-01-11 Helvoet Pharma Capsule voor flessen.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3593877A (en) * 1969-09-29 1971-07-20 Continental Can Co Pull tab mounting arrangement for easy opening can end
US3762596A (en) * 1970-07-24 1973-10-02 Dorn Co V Easy opening can end
US3795340A (en) * 1972-08-04 1974-03-05 Continental Can Co Tab mounting arrangement for easy opening can end

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3593877A (en) * 1969-09-29 1971-07-20 Continental Can Co Pull tab mounting arrangement for easy opening can end
US3762596A (en) * 1970-07-24 1973-10-02 Dorn Co V Easy opening can end
US3795340A (en) * 1972-08-04 1974-03-05 Continental Can Co Tab mounting arrangement for easy opening can end

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3952913A (en) * 1974-11-18 1976-04-27 Continental Can Company, Inc. Tab anti-rotation and hold down device
US3984025A (en) * 1974-11-18 1976-10-05 Continental Can Company, Inc. Tab anti-rotation and hold down device
USD285415S (en) 1983-04-26 1986-09-02 Metal Box P.L.C. Closure for container or the like
USD285661S (en) 1983-04-26 1986-09-16 Metal Box P.L.C. Container closure
US20060060582A1 (en) * 2002-11-07 2006-03-23 Estanislao Martinez Gomez Easy-openning lid
ES2238116A1 (es) * 2002-11-07 2005-08-16 Mivisa Envases, S.A.U. Tapa de facil apertura.
WO2004041666A1 (es) * 2002-11-07 2004-05-21 Mivisa Envases, S.A.U. Tapa de fácil apertura
ES2238116B1 (es) * 2002-11-07 2006-12-01 Mivisa Envases, S.A.U. Tapa de facil apertura.
US9162795B2 (en) 2010-04-28 2015-10-20 Crown Packaging Technology, Inc. Beverage container lid with mouth opening and separate push in vent
US20150129596A1 (en) * 2012-07-09 2015-05-14 Silgan Containers Llc Can End and Related Method
US9950831B2 (en) * 2012-07-09 2018-04-24 Silgan Containers Llc Can end and related method
USD731887S1 (en) 2013-03-14 2015-06-16 Crown Packaging Technology, Inc. Vented beverage can end
US9403628B2 (en) 2013-03-14 2016-08-02 Crown Packaging Technology, Inc. Vented beverage can and can end
US10246229B2 (en) 2013-03-14 2019-04-02 Crown Packaging Technology, Inc. Vented beverage can and can end

Also Published As

Publication number Publication date
FR2187621B1 (enrdf_load_stackoverflow) 1977-09-09
FR2187621A1 (enrdf_load_stackoverflow) 1974-01-18
GB1428441A (en) 1976-03-17
CA994689A (en) 1976-08-10

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