Patent US4098934A successfully refreshed from Google Patents.
US4098934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shatter resistant glass container
Assignee: Rexam Beverage Can Co
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Filing: 1975-10-23
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Granted: 1978-07-04
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Expires: 1995-10-23
Abstract
Abstract A container having a high mechanical service strength and shatter resistance comprises a glass container body and an overlying containment coating constituted by a plastic film. The mechanical properties of the film are such that, when subjected to tensile testing at a film extension rate of 10 in./min., the film exhibits a tensile strength of at least about 300 lbs./sq. in., an elongation of at least about 80%, and a modulus of elasticity in tension of not more than about 1,000 lbs./sq. in. throughout the course of the extension of the film.
Inventors
- 👤 M. Clifford Brockway
- 👤 Robert E. Sharpe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:03
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/28; C03C17/32; B; B65; B65D; B65D23/00; B65D23/08; B65D23/0807; B65D23/0814; Y; Y10; Y10S; Y10S215/00; Y10S215/06; Y10T; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/1317; Y10T428/1321; Y10T428/31504; Y10T428/31551; Y10T428/31645; Y10T428/31649
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
113 words
A container possessing high mechanical service strength and shatter resistance consisting essentially of a glass container body and overlying the outside surface of said body a plastic containment coating including at least one film, the mechanical properties of said coating being such that, when subjected to tensile testing at room temperature and an extension rate of at least about 10 in./min. per 5 in. of film length, the entire coating exhibits a tensile strength of at least about 300 lbs./sq. in., an elongation of at least about 80%, and a modulus of elasticity in tension which is less than about 1,000 lbs./sq. in. substantially throughout the course of the extension of the film.
Claim 2
Dependent Claim
113 words
A container possessing high mechanical service strength and shatter resistance consisting essentially of a glass container body and overlying the outside surface of said body a plastic containment coating including at least one film, the mechanical properties of said coating being such that, when subjected to tensile testing at room temperature and an extension rate of at least about 10 in./min. per 5 in. of film length, the entire coating exhibits a tensile strength of at least about 300 lbs./sq. in., an elongation of at least about 80%, and a modulus of elasticity in tension which is less than about 1,000 lbs./sq. in. substantially throughout the course of the extension of the film.
Claim 3
Dependent Claim
27 words
A container as set forth in claim 1 wherein said modulus of elasticity is less than about 750 lbs./sq. in. substantially throughout the extension of the film.
Claim 4
Dependent Claim
21 words
A container as set forth in claim 1 wherein the thickness of said plastic coating is at least about 2 mils.
Claim 5
Dependent Claim
15 words
A container as set forth in claim 1 wherein said plastic comprises an acrylic plastic.
Claim 6
Dependent Claim
21 words
A container as set forth in claim 4 wherein said plastic is constituted by a copolymer of ethyl acrylate and acrylonitrile.
Claim 7
Dependent Claim
32 words
A container as set forth in claim 5 wherein said copolymer contains approximately 85% by weight repeating units derived from ethyl acrylate and approximately 12% by weight repeating units derived from acrylonitrile.
Claim 8
Dependent Claim
22 words
A container as set forth in claim 1 wherein said film is obtained by curing a coating composition comprising an acrylic latex.
Claim 9
Dependent Claim
21 words
A container as set forth in claim 7 wherein said latex includes at least about 46.5% by weight acrylic resin solids.
Claim 10
Dependent Claim
37 words
A container as set forth in claim 8 wherein said composition has a Brookfield viscosity of between about 2,000 and about 9,000 centipoises at 1 rpm and between about 600 and about 2,400 centipoises at 5 rpm.
Claim 11
Dependent Claim
35 words
A container as set forth in claim 9 wherein said composition further comprises a thickening agent selected from the group consisting of polyacrylamide, hydroxyethyl cellulose, a cross-linked acrylic resin and high molecular weight polyethylene oxide.
Claim 12
Dependent Claim
45 words
A container as set forth in claim 7 wherein said composition further comprises up to about 2 parts by weight per 100 parts by weight of said latex of a cross-linking agent selected from the group consisting of hexamethoxymethylmelamine and a methylated urea formaldehyde resin.
Claim 13
Dependent Claim
21 words
A container as set forth in claim 8 wherein said acrylic resin solids comprise a copolymer of ethyl acrylate and acrylonitrile.
Claim 14
Dependent Claim
46 words
A container as set forth in claim 12 wherein said latex has a pH of between about 4.0 and about 5.0 and said copolymer contains approximately 85% by weight of repeating units derived from ethyl acrylate and approximately 12% by weight repeating units derived from acrylonitrile.
Claim 15
Dependent Claim
110 words
A container having high mechanical service strength and shatter resistance comprising a glass container body and overlying the outside surface of said body a containment coating consisting essentially of a single-ply film of plastic material whose properties are such that, when subjected to tensile testing at room temperature and a film extension rate of at least about 10 in./min. per 5 in. of film length, said film exhibits a tensile strength of at least about 300 lbs./sq. in., an elongation of at least about 80%, and a modulus of elasticity in tension which is less that about 1,000 lbs./sq. in. substantially throughout the course of the extension of the film.
Claim 16
Dependent Claim
110 words
A container having high mechanical service strength and shatter resistance comprising a glass container body and overlying the outside surface of said body a containment coating consisting essentially of a single-ply film of plastic material whose properties are such that, when subjected to tensile testing at room temperature and a film extension rate of at least about 10 in./min. per 5 in. of film length, said film exhibits a tensile strength of at least about 300 lbs./sq. in., an elongation of at least about 80%, and a modulus of elasticity in tension which is less that about 1,000 lbs./sq. in. substantially throughout the course of the extension of the film.
Claim 17
Dependent Claim
26 words
A container as set forth in claim 14 wherein said modulus of elasticity is less than about 750 lbs./sq. in. substantially throughout the extension of film.
Claim 18
Dependent Claim
21 words
A container as set forth in claim 14 wherein the thickness of said plastic film is at least about 2 mils.
Claim 19
Dependent Claim
15 words
A container as set forth in claim 14 wherein said plastic is an acrylic plastic.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-03 | 1982-01-02 | 1982-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-03 | 1986-01-02 | 1986-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-03 | 1990-01-02 | 1990-07-04 | $7700.00 | Window Closed / Lapsed |