US4067949A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Container with improved heat-shrunk cellular sleeve
Assignee: OI Glass Inc
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Filing: 1976-03-12
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Granted: 1978-01-10
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Expires: 1996-03-12
Abstract
Abstract There is disclosed herein improved packages, and methods of forming same, of the type wherein a container, such as for example a glass container, like a bottle or jar, is provided externally thereof with a heat-shrunk, cellular thermoplastic member, circumferentially and snugly engaging a sidewall portion of the container; the improvement resides in employing, as the thermoplastic member, a composite structure, or laminate, having a closed cellular polymeric layer preponderantly of polystyrene having incorporated therein from zero weight percent up to compatible amounts of a copolymer of ethylene and an alkyl ester of alpha-beta monoethylenically unsaturated carboxylic acid or a copolymer of ethylene and vinyl acetate or a copolymer of ethylene and an alpha-beta monoethylenically unsaturated carboxylic acid, or mixtures thereof, and, in adhered relationship to said cellular layer, a layer of a non-cellular polymeric material preponderantly of ethylene moieties having incorporated therein moieties of vinyl acetate, or an alkyl ester of alpha-beta monoethylenically unsaturated carboxylic acid, or an alpha-beta monoethylenically unsaturated carboxylic acid, or mixtures thereof. By having the non-cellular layer disposed intermediate the sidewall portion of the container and the cellular layer, improved glass retention characteristics are achieved with increased economics.
Inventors
- 👤 James A. Karabedian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:06
CPC Classifications
B; B65; B65D; B65D23/00; B65D23/08; B65D23/0842; B65D23/0878; Y; Y10; Y10S; Y10S264/00; Y10S264/06; Y10S264/71; Y10T; Y10T428/00; Y10T428/13; Y10T428/1328; Y10T428/249921; Y10T428/249953; Y10T428/249976; Y10T428/249987; Y10T428/249991; Y10T428/249992
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
220 words
In a method wherein a heat-shrinkable, polymeric sleeve, having a major orientation circumferentially of said sleeve is telescopically located about the sidewall of a container and heat-shrunk into snug engagement with said sidewall, the improvement wherein said polymeric sleeve is a composite structure of a closed cellular polymeric layer preponderantly of polystyrene having incorporated therein, in an amount from zero weight percent up to compatible amounts, a copolymer of ethylene and vinyl acetate, or a copolymer of ethylene and vinyl acetate, or a copolymer of ethylene and an alkyl ester of an alpha-beta monoethylenically unsaturated carboxylic acid, or a copolymer of ethylene and an alpha-beta monoethylenically unsaturated carboxylic acid, or mixtures thereof, and a non-cellular polymeric layer in adhered engagement with said closed cellular layer, said non-cellular layer having preponderantly ethylene moieties and incorporated therein moieties of vinyl acetate, or an alkyl ester of an alpha-beta monoethylenically unsaturated carboxylic acid, or an alpha-beta monoethylenically unsaturated carboxylic acid, or mixtures thereof, the amount of said incorporated moieties in said non-cellular layer being sufficient to promote the adhesion of said layers to the extent that a portion of said cellular layer cohesively fails when said layers are peeled apart, said cellular layer being disposed outwardly of said non-cellular layer and said non-cellular layer being disposed intermediate said cellular layer and said wall.
Claim 2
Dependent Claim
220 words
In a method wherein a heat-shrinkable, polymeric sleeve, having a major orientation circumferentially of said sleeve is telescopically located about the sidewall of a container and heat-shrunk into snug engagement with said sidewall, the improvement wherein said polymeric sleeve is a composite structure of a closed cellular polymeric layer preponderantly of polystyrene having incorporated therein, in an amount from zero weight percent up to compatible amounts, a copolymer of ethylene and vinyl acetate, or a copolymer of ethylene and vinyl acetate, or a copolymer of ethylene and an alkyl ester of an alpha-beta monoethylenically unsaturated carboxylic acid, or a copolymer of ethylene and an alpha-beta monoethylenically unsaturated carboxylic acid, or mixtures thereof, and a non-cellular polymeric layer in adhered engagement with said closed cellular layer, said non-cellular layer having preponderantly ethylene moieties and incorporated therein moieties of vinyl acetate, or an alkyl ester of an alpha-beta monoethylenically unsaturated carboxylic acid, or an alpha-beta monoethylenically unsaturated carboxylic acid, or mixtures thereof, the amount of said incorporated moieties in said non-cellular layer being sufficient to promote the adhesion of said layers to the extent that a portion of said cellular layer cohesively fails when said layers are peeled apart, said cellular layer being disposed outwardly of said non-cellular layer and said non-cellular layer being disposed intermediate said cellular layer and said wall.
Claim 3
Dependent Claim
36 words
The improvement of claim 1 wherein said cellular polymeric layer consists essentially of polystyrene and a copolymer of ethylene and vinyl acetate and said non-cellular polymeric layer consists essentially of ethylene moieties and vinyl acetate moieties.
Claim 4
Dependent Claim
59 words
The improvement of claim 2 wherein said copolymer is a copolymer of about 28 weight percent vinyl acetate and about 72 weight percent ethylene, said copolymer being present in said cellular layer in an amount of about 5 to about 10 weight percent and said polystyrene being present in an amount of about 90 to about 95 weight percent.
Claim 5
Dependent Claim
46 words
The improvement of claim 3 wherein said non-cellular polymeric layer consists essentially of about 60 to about 90 weight percent polyethylene admixed with about 10 to about 40 weight percent of a copolymer of about 28 weight percent vinyl acetate and about 72 weight percent ethylene.
Claim 6
Dependent Claim
28 words
The improvement of claim 1 wherein said cellular polymeric layer consists essentially of polystyrene and said non-cellular layer consists essentially of a copolymer of ethylene and ethyl acrylate.
Claim 7
Dependent Claim
24 words
The improvement of claim 5 wherein said copolymer is a copolymer of about 15-20 weight percent ethyl acrylate and about 85 weight percent ethylene.
Claim 8
Dependent Claim
25 words
The improvement of claim 1 wherein said cellular layer consists essentially of polystyrene and a copolymer of ethylene and an alpha-beta monoethylenically unsaturated carboxylic acid.
Claim 9
Dependent Claim
35 words
The improvement of claim 1 wherein said non-cellular layer consists essentially of a copolymer of ethylene and ethyl acrylate and said cellular layer consists essentially of polystyrene and a copolymer of ethylene and vinyl acetate.
Claim 10
Dependent Claim
25 words
The improvement of claim 1 wherein said non-cellular layer has a coating of a nontackifying polymeric material disposed intermediate said non-cellular layer and said wall.
Claim 11
Dependent Claim
10 words
The improvement of claim 9 wherein said material is polystyrene.
Claim 12
Dependent Claim
11 words
The improvement of claim 9 wherein said material is poly(alpha-methyl styrene).
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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) | 1981-01-09 | 1981-07-11 | 1982-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-09 | 1985-07-11 | 1986-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-09 | 1989-07-11 | 1990-01-10 | $7700.00 | Window Closed / Lapsed |