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Publication numberUS3912128 A
Publication typeGrant
Publication dateOct 14, 1975
Filing dateOct 29, 1973
Priority dateOct 29, 1973
Also published asCA1018108A1
Publication numberUS 3912128 A, US 3912128A, US-A-3912128, US3912128 A, US3912128A
InventorsDuffy Michael J, Weatherhead Iii Albert J, Ziemann Carl N
Original AssigneeWeatherchem Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
End closure with integral safety fulcrum pin
US 3912128 A
Abstract  available in
Images(1)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

United States Patent [1 1 Ziemann et al.

[ Oct. 14, 1975 END CLOSURE WITH INTEGRAL SAFETY FULCRUM PIN [75] Inventors: Carl N. Ziemann, Broadview Heights; Michael J. Duffy, Mayficld Heights; Albert J. Weatherhead, III, Cleveland Heights, all of Ohio [73] Assignee: Weatherchem Corporation,

Cleveland, Ohio 22 Filed: on. 29, 1973 211 App]. No.2 410,810

[52] US. Cl. 222/541 [51] Int. Cl. B65D 47/10 [58] Field of Search 222/541, 565, 556; 220/315, 35

[56] References Cited UNITED STATES PATENTS 3,157,322 11/1964 Bcrmhardt 222/556 X 3,164,306 1/1965 Kitterman et a1 222/556 X 3,379,333 4/1968 Navia 222/541 X 3,512,686 5/1970 Perriman 222/556 X 3,661,306 5/1972 Kuckens 222/541 X Primary Examiner-Stanley H. Tollberg Assistant Examiner-Norman L. Stack, Jr. Attorney, Agent, or FirmMcNenny, Farrington, Peame & Gordon [57] ABSTRACT A dispensing container end closure is disclosed which includes a one piece cap and a one piece disc rotatably secured to the cap. The disc has various shapes and sizes of openings for dispensing the contents of the container. The cap includes a removable tab which is defined by a reduced thickness tearing web for sealing the container during shipping and storage. A novel fulcrum pin is provided on the cap for preventing the tab from falling into the container during removal of the tab 2 Claims, 6 Drawing Figures US. Patent Oct. 14, 1975 END CLOSURE WITH INTEGRAL SAFETY FULCRUM PIN BACKGROUND AND SUMMARY OF THE INVENTION This invention relates generally to end closures for containers, and more specifically to plastic end closures which seal the container for shipping and storage and which include a removable tab for opening the container.

Plastic end closures for containers may include a one piece stationary cap which closes the end of the container and a one piece rotatable disc which provides various sizes and shapes of openings for dispensing the contents of the container as shown in US. Pat. No. 2,961,132 to Robert W. Ankney. The one piece cap of such prior art closures includes a removable tab which seals the container during shipping and storage and which is defined by a reduced thickness tearing web. The reduced thickness tearing web is located at the bottom of a V-shaped groove in the cap, and the V- shaped groove is discontinuous at two locations to provide two fulcrum pins about which the tab can be rotated. To remove the tab, one end of the tab is pushed down into the container to begin tearing the web at such one end, and the tab rotates about the fulcrum pins so that the other end of the tab moves upwardly away from the container. This permits grasping such other end of the tab to remove the tab and prevent the tab from falling into the container for both sanitary and safety reasons.

Such prior art end closures have received widespread commercial acceptance and in general have operated in a satisfactory manner. However, it has been found that a novel type of fulcrum pin, when applied to such end closures, provides a significantly greater resistance to premature breaking both during the tearing of the tearing web and also during rotation of the tab about the fulcrum pin.

The fulcrum pin according to the present invention is an elongated pin molded integrally with the end closure cap on the bottom surface thereof and extending laterally across the bottom of the tearing web. This permits the fulcrum pin to be longer than the prior art fulcrum pins (which could only be as long as the width of the V-shaped groove of the cap), and it is believed that the angular deformation of the fulcrum pin is thereby distributed over a greater length to reduce the twisting stress at any given location on the fulcrum pin and prevent premature breaking thereof.

BRIEF DESCRIPTION OF THE DRAWINGS These and other aspects of the invention are incorporated in the preferred embodiment of the invention shown in the drawings, wherein:

FIG. 1 is a perspective view of a container and end closure according to the principles of the invention;

FIG. 2 is an enlarged cross-sectional view taken along reference view line 2-2 of FIG. 1;

FIG. 3 is an enlarged side elevational view of the end closure shown in FIG. 1;

FIG. 4 is an enlarged perspective view showing a portion of the top of the stationary cap of the end closure shown in FIG. 1, with the tab partially rotated for re- ,moval;

FIG. 5 is an enlarged perspective view showing a portion of the bottom of the stationary cap before rotation of the tab; and

FIG. 6 is an enlarged perspective view of one of the fulcrum pins shown in FIG. 5 with the tab partially rotated for removal.

DETAILED DESCRIPTION OF THE DRAWINGS Referring now to the drawings in greater detail, FIG. 1 is a perspective view of a dispensing container having an end closure according to the principles of the invention. The dispensing container shown in FIG. 1 is particularly adapted for use with food products and includes a paper fiber tube 11, a bottom end closure 12, and a top end closure 14. The end closures l2 and 14 in the preferred embodiment are secured on the ends of the fiber tube 11 by glue. In actual use, one of the end closures is first secured on the fiber tube 11 to form an open ended can, the can which is so formed is filled with a product which is to be dispensed, and the other end closure is then secured on the open end of the can to form the dispensing container.

FIGS. 2 through 6 show the top end closure 14 in greater detail. The end closure 14 includes a one piece stationary cap 15 and a one piece rotatable disc 16. The cap 15 and the disc 16 are each injection molded, and the cap 15 is preferably made of a medium impact polystyrene while the disc 16 is preferably made of a flexible polyethylene. This provides a stationary cap which is relatively rigid and a rotatable disc which is relatively flexible so that the disc can be snapped onto the cap without breakage.

As best seen in FIGS. 1 and 2, the rotatable disc 16 includes a large arcuate shaped opening 17 for pouring or for receiving a spoon and a plurality of smaller openings 18 for dispensing the contents of the container by shaking. The rotatable disc 16 also includes a depending axle portion 19 which is snapped into a suitable opening in the center of the stationary cap 15, and the disc 16 is rotated to bring the openings 17 and 18 into alignment with a suitable opening formed in the stationary cap 15 and described below.

The construction of the stationary cap 15 is best shown in FIGS. 2 through 6. The cap 15 includes a laterally extending end portion 23 and an annular skirt portion 24 extending axially from the end portion 23.

The laterally extending end portion 23 includes a removable tab 30 which is defined by a reduced thickness tearing web 31 so that the tab 30 can be removed to permit dispensing the contents of the container through the large opening 17 or through the smaller openings 18 of the disc 16. The tearing web 31 is located at the bottom of a V-shaped groove in the laterally extending end portion 23, and the V-shaped groove extends from the top surface of the end portion 23 and terminates at the tearing web 31.

The laterally extending end portion 23 of the stationary cap 15 also includes two elongated fulcrum pins 32 molded integrally with the cap 15 on the bottom surface thereof. The longitudinal axis of each of the fulcrum pins 32 extends laterally across the tearing web 31, and the fulcrum pins 32 are located on opposite sides of the tearing web 31. In this manner, the tab 30 seals the stationary cap 15 during shipping and storage, and the tab 30 is removed for dispensing the contents of the container.

To remove the tab 30, one end of the tab 30 is manually pushed downwardly into the container in the manner shown in FIG. 4. This begins to break the tearing web 31 at such one end of the tab 30. As the tearing web 31 tears further from such one end of the tab 30, the tearing reaches the location of the fulcrum pins 32. The fulcrum pins 32 do not break, but instead they provide a fulcrum about which the tab 30 rotates so that the other end of the tab 30 moves in a direction away from the container to tear the web 31 at such other end. When the web 31 is torn around the periphery of the tab 30, the one end of the tab 30 is pushed further manually into the container so that the tab 30 rotates about the fulcrum pins 32 and the other end of the tab 30 can be grasped. The tab 30 can then be twisted back and forth until the fulcrum pins 32 break to permit removal of the tab 30.

The operation of the fulcrum pins 32 during rotation of the tab 30 is best illustrated in FIG. 6. As the tab 30 rotates, the angular deformation of each fulcrum pin 32 is believed to be distributed over a length which is greater than the length of the prior art fulcrum pins located in the V-shaped groove of the cap as disclosed in the aforementioned US. Pat. No. 2,961,132. It is believed that this reduces the twisting stress at any given location on the fulcrum pins 32, and that this is the principal reason that premature breaking of the fulcrum pins 32 is prevented by this invention.

Test samples of this invention were made by the assignee of this application using polystyrene for the cap 15. It was found that, after breaking of the tearing web 31, the removable tab 30 could be rotated through an arc of at least 90 without breaking the fulcrum pins 32. It was also found that, upon such rotation, the fulcrum pins 32 appeared to deflect in the manner shown in FIG. 6 along a length greater than the width of the V- shaped groove in the cap 15. To compare the fulcrum pins 32 with the fulcrum pins provided in prior art end closures manufactured by the assignee of this application in the manner disclosed in US. Pat. No. 2,961,132, the polystyrene test samples of the end closures according to the principles of this invention were compared to substantially identical polystyrene end closures having the prior art type fulcrum pins located in the V-shaped groove of the cap. It was found from such comparison that the end closures according to the principles of the invention provide a significantly greater resistance to premature breaking of the fulcrum pins (and consequent falling of the tab into the container) than the prior art fulcrum pins.

What is claimed is:

l. A container comprising a tube, a bottom end closure, and a top end closure, said top end closure including a one piece plastic cap secured to said tube, said cap including a removable tab defined by a reduced thickness tearing web at the bottom surface of said cap and two fulcrum pins being constructed and arranged to provide a pivotal axis for rotating one end of said tab in a direction into said container and the other end of said tab in a direction out of said container to break said tearing web when a force is exerted on said one end of said tab in a direction into said container, a groove in said cap extending downwardly from the top surface of said cap to said tearing web at said bottom surface of said cap, each of said fulcrum pins including an elongated pin molded integrally with said cap on the bottom surface thereof, the longitudinal axis of each of said elongated pins extending laterally across said tearing web, the length of each of said elongated pins exceeding the width of said groove and each of said elongated pins extending beyond said tearing web on both sides of said tearing web a substantial distance sufficient to prevent breaking of said elongated pins during said breaking of said tearing web whereby said elongated pins prevent said tab from falling into said container, and said elongated pins being frangible in response to a shearing force substantially in excess of the force required to shear said tearing web whereby after said breaking of said tearing web said elongated pins may be broken to permit removal of said tab whereby said tab may be permanently removed to provide a dis pensing passage.

2. A container as defined in claim 1 wherein said elongated pins are located on opposite sides of said tearing web and said groove in generally V-shaped.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3157322 *Sep 14, 1961Nov 17, 1964Nibot CorpDispensing unit and method of producing the same
US3164306 *Jan 17, 1963Jan 5, 1965Pacific Ind IncBottle closure
US3379333 *Aug 5, 1966Apr 23, 1968Reynolds Metals CoContainer easy-open means and method of making the same or the like
US3512686 *Feb 23, 1968May 19, 1970Sherwood Medical Ind IncCarafe lid assembly
US3661306 *Dec 16, 1970May 9, 1972Kuckens AlexanderClosure for containers and device utilizing such closure
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4059201 *Mar 14, 1977Nov 22, 1977J. L. Clark Manufacturing Co.Container closure with foil seal
US4274563 *Jul 30, 1979Jun 23, 1981Weatherchem CorporationPlastic end closure for hermetically sealed container
US4489864 *Apr 27, 1983Dec 25, 1984Weatherchem CorporationInterference stop punch-out closure
US4598837 *Oct 3, 1985Jul 8, 1986Courtesy Mold & Tool CorporationEnd closure with tamper evident element
US4611725 *Nov 4, 1985Sep 16, 1986Chris Kaye Plastics Corp.Tamper evident breakaway closure for containers
US4706835 *Apr 16, 1987Nov 17, 1987Courtesy Mold & Tool CorporationClosure with top cut tamper evident feature
US4718570 *Mar 18, 1987Jan 12, 1988Vita Zahnfabrik H. Rauter Gmbh & Co.Dispenser for pasty compositions
US4759478 *May 3, 1982Jul 26, 1988International Paper CompanyHinged plug type lid
US4925034 *May 19, 1989May 15, 1990Combibloc, Inc.Package fitment
US4925067 *Jun 30, 1988May 15, 1990Phoenix Closures, Inc.Dispenser closure
US5167338 *Apr 22, 1991Dec 1, 1992James KickShake and pour end closure with stay open lid
US5402921 *Aug 10, 1993Apr 4, 1995Weatherchem CorpRotor-type dispenser
US5407107 *Dec 6, 1993Apr 18, 1995Sealright Co., Ltd.Dispenser closure
US5566850 *Dec 5, 1994Oct 22, 1996Weatherchem CorporationRotor-type dispenser
US5833112 *Aug 19, 1997Nov 10, 1998Elopak Systems AgPouring spout attachment
US5894950 *Oct 15, 1997Apr 20, 1999C.A.P.S. Inc.One-piece closure with re-closable break away lid
US6488187 *Dec 21, 2000Dec 3, 2002Brent River Packaging CorporationSifter dispensing cap and base
US7134575Dec 18, 2003Nov 14, 2006Gateway Plastics, Inc.Closure for a container
US8899437Jan 15, 2013Dec 2, 2014Gateway Plastics, Inc.Closure with integrated dosage cup
US8955705Mar 26, 2012Feb 17, 2015Gateway Plastics, Inc.Closure for a container
USRE33319 *Feb 13, 1989Sep 4, 1990Vita Zahnfabrik H. Rauter Gmbh & Co.Dispenser for pasty compositions
WO1990014279A1 *Mar 15, 1990Nov 29, 1990Combibloc IncPackage fitment
Classifications
U.S. Classification222/541.6, 222/548
International ClassificationB65D47/04, B65D47/26, B65D47/06, B65D47/10
Cooperative ClassificationB65D47/265, B65D47/10
European ClassificationB65D47/10, B65D47/26D4