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US4448326A
Expired / Lapsed
US
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Easy opening tape closure for beverage container
Assignee: 3M Co
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Filing: 1982-11-01
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Granted: 1984-05-15
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Expires: 2002-11-01
Abstract
Abstract A closure described having a tab end which is formed with punctures and projections surrounding those punctures which have been formed by fracturing the tape. The projections extend from opposite surfaces of the tape near adjacent punctures.
Inventors
- 👤 Wilfred R. Brochman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:54
CPC Classifications
B; B65; B65D; B65D17/00; B65D17/50; B65D17/501; B65D17/505; B65D2517/00; B65D2517/0001; B65D2517/001; B65D2517/0013; B65D2517/0058; B65D2517/0059; B65D2517/0061; B65D2517/0062; B65D2517/50; B65D2517/5002; B65D2517/5005; B65D2517/5024; B65D2517/5027; B65D2517/5072; B65D2517/5083; B65D2517/5091
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
57 words
An easy opening closure for a container comprising a polymeric film having a free end portion to be grasped by the user, said free end portion having an array of punctures formed therein with each puncture being surrounded by a plurality of projections fractured from the tape with the projections projecting in opposite directions from adjacent punctures.
Claim 2
Dependent Claim
57 words
An easy opening closure for a container comprising a polymeric film having a free end portion to be grasped by the user, said free end portion having an array of punctures formed therein with each puncture being surrounded by a plurality of projections fractured from the tape with the projections projecting in opposite directions from adjacent punctures.
Claim 3
Dependent Claim
50 words
A closure according to claim 1 wherein said film is selected from the group consisting of polytetramethylene terephthalate, polyamide derived from 6--6 nylon, physical blends of polytetramethylene terephthalate/polyethylene, physical blends of polytetramethylene terephthalate/phenoxy, polyvinylchloride, polypropylene glycol modified polyethylene/terephthalate, graft copolymers comprising acrylonitrile/methylmethacrylate copolymer grafted onto acrylonitrile/butadiene copolymer backbone, or polycarbonate.
Claim 4
Dependent Claim
21 words
A closure according to claim 2 wherein said film has a thickness of between about 2 mils and about 7 mils.
Claim 5
Dependent Claim
16 words
A closure according to claim 1 wherein said film has a thickness of about 5 mils.
Claim 6
Dependent Claim
90 words
An easy opening tape closure for a can end having a pour opening formed therein comprising a tape portion disposed over said pour opening and adhered to the surface of the can end about the pour opening, said tape having a free end portion to be grasped by the user, said free end portion having an array of punctures formed therein with each puncture being surrounded by a plurality of projections fractured from the tape, the projections projecting from the surface of the tape in opposite directions from adjacent punctures.
Claim 7
Dependent Claim
90 words
An easy opening tape closure for a can end having a pour opening formed therein comprising a tape portion disposed over said pour opening and adhered to the surface of the can end about the pour opening, said tape having a free end portion to be grasped by the user, said free end portion having an array of punctures formed therein with each puncture being surrounded by a plurality of projections fractured from the tape, the projections projecting from the surface of the tape in opposite directions from adjacent punctures.
Claim 8
Dependent Claim
56 words
A tape closure according to claim 5 wherein said tape comprises a backing selected from the group consisting of polytetramethylene terephthalate, polyamide derived from 6--6 nylon, physical blends of polytetramethylene terephthalate/polyethylene, physical blends of polytetramethylene terephthalate/phenoxy, polyvinylchloride, polypropylene, glycol modified polyethylene/terephthalate, graft copolymers comprising acrylonitrile/methylmethacrylate copolymer grafted onto acrylonitrile/butadiene copolymer backbone, polycarbonate, or thin foil-film composites.
Claim 9
Dependent Claim
22 words
A tape closure according to claim 6 wherein said tape has a thickness of between about 2 mils and about 7 mils.
Claim 10
Dependent Claim
17 words
A tape closure according to claim 5 wherein said tape has a thickness of about 5 mils.
Claim 11
Dependent Claim
26 words
A tape closure according to claim 5 wherein the punctures are spaced 0.047 inch apart and at least 0.09 inch from an edge of the tape.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-15 | 1987-11-14 | 1988-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-15 | 1991-11-14 | 1992-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-15 | 1995-11-14 | 1996-05-15 | $7700.00 | Window Closed / Lapsed |