US4342800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric articles
Assignee: Raychem Ltd
•
Filing: 1980-07-28
•
Granted: 1982-08-03
•
Expires: 2000-07-28
Abstract
Abstract A process for the production of hollow heat-recoverable articles which comprises deforming a substantially non-cross-linked polymeric material at a temperature below the crystalline melting point or softening point of the material, fusing together parts of the material or a part or parts of the material and at least one other polymeric component to produce the configuration of at least one hollow heat-recoverable article and subsequently cross-linking the substantially non-cross-linked material.
Inventors
- 👤 Pushkumar D. Changani
- 👤 Donald G. Peacock
- 👤 David Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:53
CPC Classifications
H; H02; H02G; H02G15/00; H02G15/08; H02G15/18; H02G15/1806; B; B29; B29C; B29C61/00; B29C61/06; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1036; Y10T156/1038; Y10T428/00; Y10T428/13; Y10T428/1328; Y10T428/1331
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
88 words
A process for the production of a hollow heat-recoverable article, the steps comprising: deforming a substantially non-cross-linked polymeric material at a temperature below the crystalline melting point or softening point of the material to render the material heat-recoverable primarily in one direction; fusing together parts of the material to one other substantially non-cross-linked polymeric component to produce a hollow heat-recoverable article having a radial axis and a longitudinal axis, said article being heat-recoverable substantially only in a radial sense; and, cross-linking the fused portions of the polymetic material.
Claim 2
Dependent Claim
88 words
A process for the production of a hollow heat-recoverable article, the steps comprising: deforming a substantially non-cross-linked polymeric material at a temperature below the crystalline melting point or softening point of the material to render the material heat-recoverable primarily in one direction; fusing together parts of the material to one other substantially non-cross-linked polymeric component to produce a hollow heat-recoverable article having a radial axis and a longitudinal axis, said article being heat-recoverable substantially only in a radial sense; and, cross-linking the fused portions of the polymetic material.
Claim 3
Dependent Claim
21 words
A process as in claim 1 wherein the non-cross-linked material that is deformed has a thickness of at least 0.1 mm.
Claim 4
Dependent Claim
18 words
A process as in claim 1 wherein the fusing step defines a plurality of separable hollow heat-recoverable articles.
Claim 5
Dependent Claim
34 words
A process as in claim 1 wherein the non-cross-linked polymeric material is in the form of a radially expanded polymeric tube which is fused to itself to produce the configuration of the desired article.
Claim 6
Dependent Claim
37 words
A process according to claim 1 wherein the non-cross-linked polymeric material is in the form of a longitudinally expanded polymeric web which is fused to a superimposed analogous web to produce the configuration of the desired article.
Claim 7
Dependent Claim
51 words
A process according to claim 1 wherein the non-cross-linked polymeric material is in the form of a non-expanded polymeric web which is locally deformed in at least one region thereof, said deformed region being fused to a deformed region of an analogous web to pruduce the configuration of the desired article.
Claim 8
Dependent Claim
15 words
A process according to claim 6 wherein said web is locally deformed by vacuum forming.
Claim 9
Dependent Claim
14 words
A process according to claim 1 wherein the resulting article is shaped and non-planer.
Claim 10
Dependent Claim
13 words
A hollow heat-recoverable article produced by the process as defined in claim 1.
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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) | 1985-08-02 | 1986-02-01 | 1986-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-02 | 1990-02-01 | 1990-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-02 | 1994-02-01 | 1994-08-03 | $7700.00 | Window Closed / Lapsed |