US3920143A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic cap for stoppering bottles
Assignee: Tuboplast France SA
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Filing: 1975-04-30
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Granted: 1975-11-18
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Expires: 1995-04-30
Abstract
Abstract The invention concerns plastic seals or caps for stoppering bottles. The skirt of these caps is obtained by coextrusion or thermoshaping of two plastic materials of the same family. The inside layer contains an additive which reduces the rubbing factor, while the outside layer may have different characteristics.
Inventors
- 👤 Jean-Marie Vouillemin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:02
CPC Classifications
B; B65; B65D; B65D41/00; B65D41/62; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/18; B32B27/32; B32B2250/00; B32B2250/02; B32B2323/00; B32B2323/04; B32B2323/046; B32B2435/00; B32B2435/02; Y; Y10; Y10S; Y10S215/00; Y10S215/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
71 words
A plastic cap for stoppering bottles and the like comprising a cylindrical plastic skirt open at both ends, a circular disc secured within one of said openings to close said one end, the body of said skirt having an inner and an outer layer being formed by the coextrusion of two thermoplastic materials of the same family, the inner layer of the skirt containing an additive which reduces the rubbing factor.
Claim 2
Dependent Claim
71 words
A plastic cap for stoppering bottles and the like comprising a cylindrical plastic skirt open at both ends, a circular disc secured within one of said openings to close said one end, the body of said skirt having an inner and an outer layer being formed by the coextrusion of two thermoplastic materials of the same family, the inner layer of the skirt containing an additive which reduces the rubbing factor.
Claim 3
Dependent Claim
14 words
A cap as defined in claim 1, wherein the additive is monostearate of glycerine.
Claim 4
Dependent Claim
14 words
A cap as defined in claim 1, wherein the additive is a fatty starch.
Claim 5
Dependent Claim
25 words
A cap as defined in claim 1 wherein the skirt is formed by thermoshaping of composite sheets obtained by the coextrusion of two thermoplastic materials.
Claim 6
Dependent Claim
17 words
A cap as defined in claim 1, and further including an air escape opening in said disc.
References Cited (Backward Citations)
US3862614A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-17 | 1979-05-19 | 1979-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-17 | 1983-05-19 | 1983-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-17 | 1987-05-19 | 1987-11-18 | $7700.00 | Window Closed / Lapsed |