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Publication numberUS3547305 A
Publication typeGrant
Publication dateDec 15, 1970
Filing dateNov 15, 1968
Priority dateNov 15, 1968
Publication numberUS 3547305 A, US 3547305A, US-A-3547305, US3547305 A, US3547305A
InventorsKhoury Nick S
Original AssigneeContinental Can Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Easy opening container
US 3547305 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

United States Patent 1 13,547,305

[72] Inventor Nick S. Khoury [56] References Cited Worth, lll- UNITED STATES PATENTS [211 P 2,719,647 /1955 Freeman 220/53 [221 PM 1968 3,021,976 2/1962 Tracy 220/42x [451 Patented 3 347 408 10/1967 Baker 220/ [73] Assignee Continental Can Company, Inc.

N Y k, NY; Primary Examiner-George F. Hall a corporation f N Y k Attorneys-Fred P. Kostka, Joseph E. Kerwin and William A.

Dittmann ABSTRACT: The disclosure relates to an easy opening con- [54] tainer. The container comprises an end panel formed with an g opening bounded by a downwardly inclined marginal edge [52] U.S.Cl. 220124, portion which terminates in an upwardly directed curl. The 220/53 curl is disposed so that an extension of the plane of the panel [51] Int. Cl. Bd 3 /00, surface about said marginal portion is tangential to the outer 865d 41/00. l16 5d 17/20 circumference of the curl. A removable pressure sensitive ad- [50] Field of Search 20/24, 53, hesive tape is adhered to said panel over an opening in tangential contact with the curl.


EASY OPENING CONTAINER BACKGROUND or THE INVENTION The present invention relates to easy opening containers and, more particularly, to an easy opening container of the type having an opening sealed by a pressure sensitive tape.

Heretofore easy opening containers of the type having a pressure sensitive tape covered opening have been constructed so that a raw edge is exposed to the contents of the container when the tape seal is attached thereto and removed. The containers with which the tape seal is used are generally made from a metal which is subject to oxidation such as steel and the like. Such oxidation of the raw edge is objectionable because it may cause a contamination or otherwise affect the taste or appearance of the container contents. To eliminate this objection, it has been standard practice to line the container interior with a nonoxidizing coating or film. However, in the easy opening taped-sealed container the raw edge fonned during the punching of the opening exposes a nonlined surface so that oxidation may occur thereon. In order to eliminate the oxidation at the raw edge, it has been necessary to apply a nonoxidizing coating thereon in a separate operation. This operation materially reduces the production rate of the containers and also is costly.

Moreover, the punched opening has been formed so that the raw edge is exposed to the user upon removal of the tape so that frequently injury as by cutting of the fingers may occur. This hazard is particularly prevalent when the container is left in a position where children may have access thereto. As is well known, children are naturally curious and investigate by probing. Should a child probe his fingers in the opening with a raw exposed edge, he may readily cut his fingers.

SUMMARY OF THE INVENTION By the present invention it is proposed to provide an improved easy opening container having a tape seal covering and an opening which is constructed in a manner so as to obviate the difficulties encountered heretofore.

This is accomplished generally by forming the opening with a marginal edge portion including a downwardly inclined leg and terminating in an upwardly directed curl of which the upper edge extends toward the upper face or surface of the marginal edge portion. The leg and curl are formed so that an extension of the planar surface of the panel about the opening lies tangential to the circumference of the curl.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a container including the easy opening structure embodying the principles of the present invention; and

FIG. 2 is a cross-sectional view taken generally along the lines 2-2 of FIG. 1 and showing in particular the structure of the opening and the tape seal positioned thereover.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to the drawing, there is shown a container including a body 11, a bottom end closure 12 and top end closure 13. The bottom and top end closures 12 and 13 respectively are attached to the body 11 as by double seams 14. Formed in the top end closure 13 is a pour opening 16 which is covered by a tape seal 17.

The top end closure 13 as well as the bottom end closure 12 are made from metal such as steel, aluminum or the like. The interior surface of the end closures may include a lining which may be either a tin plate or a suitable coating for preventing oxidation thereof. As pointed out heretofore, the oxidation of the metal is undesirable because it may contaminate or otherwise affect the taste or appearance of the contents of the container.

The end closure 13 includes a panel 18 in which the opening 16 is formed as by (punching or the like. The punching operatron causes a raw e ge 19 to be formed thereon. The edge 19,

of course, is free of any lining or nonoxidizing coating so that metal is exposed to the contents of the container and could cause the detrimental conditions.

By the present invention, after the initial punching of the opening 16, the marginal edge about the opening 16 is formed to provide a downwardly inclined flange 21 from which there extends an upwardly directed curl 22. The downwardly inclined flange 21 and curl 22 are formed so that the extension of the plane of the upper surface of the panel 18 lies substantially tangential with the curl 22. It is to be noted that the raw or free edge 19 is turned downwardly and inwardly out of the plane of the surface of the panel 18 so that a sharp edge is not exposed. In this manner the likelihood of injury as by cutting is minimized. At the same time the curl 22 reinforces the panel 18 about the opening and also permits a free flow of the contents from the container 10.

The sealing tape 17 is sized to overlie the opening and be adhered to the marginal portion bounding the inclined leg 21 of the opening 16. With the curl 22 disposed as previously described, the sealing tape 17 also tangentially engages and is adhered to the curl 22. The tape 17 is preferably made of a resilient, high tensile stress material such as plastic, metal foilbacked paper, plastic film-backed paper or the like. Moreover, the material is air-impervious to prevent contamination of the container contents. The underside of the tape 17 is formed of a thin film 23 of a suitable pressure sensitive adhesive which is pressed against the panel 17 so as to form a seal. The pressure sensitive adhesive is sufficiently low in peel resistance to permit it to be clearly stripped from the panel surface without requiring the use of opening tools of any type.


1. An easy opening container comprising a panel, an opening formed in said panel and sealed by a tape having a pressure sensitive face releasably bonded to said panel, said opening being bounded by a flange inclined downwardly out of the plane of said panel and terminating in an upwardly directed curl having the free edge thereof turned downwardly and inwardly to face said inclined flange, said curl being formed so that an extension of the plane lying in the surface of said panel is substantially tangential to said curl whereby said pressure sensitive face of said tape is tangentially adhered to said curl.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3826221 *Jun 13, 1972Jul 30, 1974Evans Medical LtdClosures for containers
US3908857 *Oct 15, 1974Sep 30, 1975Continental Can CoTape seal for container
US3964415 *Jan 14, 1975Jun 22, 1976Minnesota Mining And Manufacturing CompanyCan closure
US4087163 *May 14, 1976May 2, 1978Polaroid CorporationPhotographic processing fluid applicator
US4234121 *Apr 2, 1979Nov 18, 1980Toshihiko SasakiContainer for liquid
US4253584 *May 21, 1979Mar 3, 1981Swiss Aluminium Ltd.Ring and closure for cans
US4363582 *Nov 6, 1980Dec 14, 1982Swiss Aluminium Ltd.Process for the manufacture of rings for lids for cans
US4522305 *Aug 23, 1982Jun 11, 1985Tetra Pak Developpement SaOpening arrangement for packing containers with pressurized contents
US4540105 *Aug 13, 1984Sep 10, 1985General Can Company, Inc.Closure opening having protective bead
US4557398 *Aug 17, 1984Dec 10, 1985International Paper CompanyEnd closure structure for a container
US4558782 *Feb 7, 1983Dec 17, 1985Imperial Plastics, Inc.Point of sales package for cassette tape cartridges
US4637543 *Oct 2, 1985Jan 20, 1987Weidenhammer Packungen Kg Gmbh & Co.Fiber can with reinforcing crimped metal closure
US4915254 *Dec 5, 1988Apr 10, 1990Alcan Rorschach AgClosure unit made of sheet metal or plating, method of manufacturing such a closure unit and container having a closure unit obtained thereby
US5020955 *Oct 18, 1989Jun 4, 1991Alcan Rorschach AgMethod of manufacturing a closure unit made of sheet metal or plating and container having a closure unit obtained thereby
US5341557 *Nov 12, 1992Aug 30, 1994Brandeis UniversityUse of non-adhesive stretch-film as a laboratory container closure
US7063212Sep 19, 2002Jun 20, 2006Bill Thomas Associates, Inc.Multiple seal storage and transport container
US7378625 *Feb 22, 2005May 27, 2008Ball CorporationMicrowavable metallic container
US7611557Nov 3, 2009Plitek, LlcReversed pressure relief valve
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US8080770May 2, 2007Dec 20, 2011Ball CorporationMicrowavable metallic container
US20030062370 *May 17, 2002Apr 3, 2003Ball Melville DouglasCan with peelably bonded closure
US20050199619 *Feb 22, 2005Sep 15, 2005Michael RichardsonMicrowavable metallic container
US20060227462 *Mar 24, 2005Oct 12, 2006Hoffman Karl KReversed pressure relief valve
US20070108196 *Jan 10, 2007May 17, 2007Ball CorporationMicrowavable Metallic Container
US20070284368 *May 2, 2007Dec 13, 2007Ball CorporationMicrowavable Metallic Container
US20070289892 *Jun 19, 2006Dec 20, 2007Dan HogertyNested container
US20120043324 *Aug 17, 2011Feb 23, 2012Silgan Containers LlcContainer with Reduced, Peel-Off-Force Tear Configuration
DE2838505A1 *Sep 4, 1978Dec 13, 1979AlusuisseVerfahren zur herstellung von deckelringen fuer konservendosen
EP0090957A2 *Mar 9, 1983Oct 12, 1983Sandherr Packungen AGClosure for sterilisable containers
EP0171498A2 *Mar 14, 1985Feb 19, 1986International Paper CompanyAn end closure structure for a container
EP0221842A1 *Sep 4, 1986May 13, 1987Alcan Rorschach AGPour opening in a container cover with a pull tab , and production of this opening
WO1993002860A1 *Aug 7, 1992Feb 18, 1993Brandeis UniversityImproved self-sealing stretch film for laboratory use
WO2006091821A3 *Feb 22, 2006Mar 1, 2007Ball CorpMicrowavable metallic container
U.S. Classification220/359.1, 968/819
International ClassificationG04F5/00, B65D17/00, G04F5/02, B65D17/50
Cooperative ClassificationB65D2517/5029, G04F5/022, B65D2517/5054, B65D2517/0061, B65D17/502, B65D2517/0011
European ClassificationB65D17/50A1, G04F5/02B