Patent US2837383A successfully refreshed from Google Patents.
Patent US4496616A successfully refreshed from Google Patents.
US4496616A
Expired / Lapsed
US
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Strip of heat-recoverable articles
Assignee: Raychem Ltd
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Filing: 1982-03-15
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Granted: 1985-01-29
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Expires: 2002-03-15
Abstract
Abstract A strip of hollow heat-recoverable articles formed side-by-side by tear welding two lengths of polymeric material together at intervals so that individual articles may be torn off. A preferred method of making the strip involves cross-linking after the tear welding, heating the strip, and inflating the hollow articles to render them heat-recoverable by introducing pressure via an interconnecting passage formed for that purpose during the tear welding.
Inventors
- 👤 Robert H. McLoughlin
- 👤 Stanley W. Kirkham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:05
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/02; B29C53/04; B29C53/06; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B29C49/00; B29C49/02; B29C49/06905; B29C49/0691; B29C61/00; B29C61/06; B32B7/00; B32B7/04; B32B7/12; B29C59/00; B29C59/02; B29C59/04; B32B2305/00; B32B2305/72; B32B2307/00; B32B2307/70; B32B2307/732; B32B2307/734; B32B2307/736; Y; Y10; Y10S; Y10S174/00; Y10S174/08; Y10S428/00; Y10S428/913; Y10T; Y10T428/00; Y10T428/13; Y10T428/1328; Y10T428/1331; Y10T428/15; Y10T428/24; Y10T428/24628; Y10T428/24661; Y10T428/24744
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
76 words
A strip of heat-recoverable articles formed by bonding together at intervals two superposed lengths of thermoplastic organic polymeric material, in which strip adjacent articles are connected together by elongate tear welds in the organic polymeric material, the welds extending transversely of the strip and permitting individual articles to be torn off, the articles being interconnected by a passage extending along the strip which passage is capable of conveying fluid pressure into the articles during expansion thereof.
Claim 2
Dependent Claim
76 words
A strip of heat-recoverable articles formed by bonding together at intervals two superposed lengths of thermoplastic organic polymeric material, in which strip adjacent articles are connected together by elongate tear welds in the organic polymeric material, the welds extending transversely of the strip and permitting individual articles to be torn off, the articles being interconnected by a passage extending along the strip which passage is capable of conveying fluid pressure into the articles during expansion thereof.
Claim 3
Dependent Claim
12 words
A strip according to claim 1 wherein the polymeric material is cross-linked.
Claim 4
Dependent Claim
17 words
A strip according to claim 2, wherein the said articles are in side-by-side relationship along the strip.
Claim 5
Dependent Claim
38 words
A strip according to claim 1, wherein the spacing of adjacent articles and the dimensions of the tear weld are such that the part of the tear weld extending between the adjacent articles is of substantially uniform thickness.
Claim 6
Dependent Claim
29 words
A strip according to any of claim 1, wherein the two lengths of polymeric material are deformed substantially symmetrically towards each other in the region of the tear weld.
Claim 7
Dependent Claim
30 words
A strip according to claim 1, wherein the articles have been deformed at elevated temperature and cooled in the deformed state so as to fix an open cross-sectional configuration therein.
Claim 8
Dependent Claim
28 words
A strip according to claim 1, wherein the articles are in a flat configuration which can be opened by flexing opposed portions of the lengths of polymeric material.
Claim 9
Dependent Claim
17 words
A strip according to claim 1 wherein the articles are internally coated with adhesive or sealant material.
Claim 10
Dependent Claim
118 words
A strip of heat-recoverable articles formed by bonding together at intervals two superposed lengths of thermoplastic organic polymeric material, in which strip adjacent articles are connected together by elongate tear welds in the organic polymeric material, the welds extending transversely of the strip and permitting individual articles to be torn off, each article having at least one opening substantially at the edge of the strip, at least some of the articles comprising two open or flat tubular enclosures having openings substantially at each edge of the strip connected together in "H" formation by a central bridging open or flat tubular enclosure, the bridging tubular enclosure being severable to convert each "H"-shaped article into a pair of "T"-shaped articles.
Claim 11
Dependent Claim
118 words
A strip of heat-recoverable articles formed by bonding together at intervals two superposed lengths of thermoplastic organic polymeric material, in which strip adjacent articles are connected together by elongate tear welds in the organic polymeric material, the welds extending transversely of the strip and permitting individual articles to be torn off, each article having at least one opening substantially at the edge of the strip, at least some of the articles comprising two open or flat tubular enclosures having openings substantially at each edge of the strip connected together in "H" formation by a central bridging open or flat tubular enclosure, the bridging tubular enclosure being severable to convert each "H"-shaped article into a pair of "T"-shaped articles.
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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) | 1988-01-29 | 1988-07-30 | 1989-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-29 | 1992-07-30 | 1993-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-29 | 1996-07-30 | 1997-01-29 | $7700.00 | Window Closed / Lapsed |