US4310100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Container cap having a peelable liner
Assignee: Toyo Seikan Group Holdings Ltd
•
Filing: 1979-11-02
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Granted: 1982-01-12
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Expires: 1999-11-02
Abstract
Abstract A container cap having a coated metal shell. A peelable adhesive layer joins a liner to the shell. The peelable adhesive layer comprises a local coating resin layer having a diameter less than that of the metal shell and a layer of an epoxy resin.
Inventors
- 👤 Go Kunimoto
- 👤 Isao Ichinose
- 👤 Noboru Suzuki
- 👤 Fumio Mori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:12
CPC Classifications
B; B65; B65D; B65D53/00; B65D41/00; B65D41/02; B65D41/10; B65D41/12
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
111 words
A container cap comprising a metal shell, a thermoplastic resin peelable liner on the inside of said shell, a peelable adhesive layer having a diameter less than that of said metal shell and larger than that of a peelable portion of the liner, and an epoxy resin coating layer secured to said liner overlying the inside surface of said metal shell and said peelable adhesive layer to form an easily peelable adhesive interface with said peelable adhesive layer whereby pressing the periphery of the liner overlying said inner face will cause a break in the epoxy resin layer to allow easy peeling of the liner from the shell at the interface.
Claim 2
Dependent Claim
111 words
A container cap comprising a metal shell, a thermoplastic resin peelable liner on the inside of said shell, a peelable adhesive layer having a diameter less than that of said metal shell and larger than that of a peelable portion of the liner, and an epoxy resin coating layer secured to said liner overlying the inside surface of said metal shell and said peelable adhesive layer to form an easily peelable adhesive interface with said peelable adhesive layer whereby pressing the periphery of the liner overlying said inner face will cause a break in the epoxy resin layer to allow easy peeling of the liner from the shell at the interface.
Claim 3
Dependent Claim
19 words
A container cap according to claim 1 wherein said peelable adhesive layer has a softening point below 180° C.
Claim 4
Dependent Claim
16 words
A container cap according to claim 1 wherein said peelable adhesive layer comprises a hydrocarbon resin.
Claim 5
Dependent Claim
15 words
A container cap according to claim 3 wherein said hydrocarbon resin comprises a petroleum resin.
Claim 6
Dependent Claim
16 words
A container cap according to claim 3 wherein said hydrocarbon resin layer comprises a coumarone-indene resin.
Claim 7
Dependent Claim
16 words
A container cap according to claim 1 wherein said peelable adhesive layer comprises a natural resin.
Claim 8
Dependent Claim
14 words
A container cap according to claim 6 wherein said natural resin comprises a rosin.
Claim 9
Dependent Claim
15 words
A container cap according to claim 6 wherein said natural resin comprises a rosin ester.
Claim 10
Dependent Claim
15 words
A container cap according to claim 6 wherein said natural resin comprises a terpene resin.
Claim 11
Dependent Claim
16 words
A container cap according to claim 1 wherein said peelable adhesive layer is formed by printing.
References Cited (Backward Citations)
US2567067A
Cited
US3312005A
Cited
US3361281A
Cited
US3557987A
Cited
US3633781A
Cited
FR2178313A5
Cited
US4111323A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-01-11 | 1985-07-13 | 1986-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-11 | 1989-07-13 | 1990-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-11 | 1993-07-13 | 1994-01-12 | $7700.00 | Window Closed / Lapsed |