US4816309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-recoverable fabric article
Assignee: Raychem Ltd
•
Filing: 1987-10-02
•
Granted: 1989-03-28
•
Expires: 2007-10-02
Abstract
Abstract A composite material comprising a recoverable fabric and a polymeric matrix material may be recovered around a cable splice to protect it. The fabric may have multifilament glass fibres in one direction which may be provided with a continuous coating to prevent moisture that may travel along their length from travelling through the thickness of the composite.
Inventors
- 👤 Norman Hutt
- 👤 Winfield P. Roland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:50
CPC Classifications
B; B29; B29C; B29C61/00; B29C61/06; B29C61/0608; B29C61/0658; B29C61/0633; Y; Y10; Y10S; Y10S174/00; Y10S174/08; Y10S428/00; Y10S428/913; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1028; Y10T156/1033; Y10T428/00; Y10T428/13; Y10T428/131; Y10T428/1314; Y10T428/1328; Y10T428/26; Y10T428/28; Y10T428/2809; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/2835; Y10T428/2848; Y10T442/00; Y10T442/20; Y10T442/2213; Y10T442/2221; Y10T442/30; Y10T442/3049
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
78 words
A heat recoverable article comprising: (a) a fabric cover comprising (i) a first set of fibres which are heat recoverable, and (ii) a second set of fibres which are multifilament fibres, at least some of which multifilament fibres are provided, individually, with a substantially continuous coating of a non-conductive polymeric material, and (b) a second polymeric material applied to the fabric, to render the article substantially impervious to the passage of liquid through the thickness of the article.
Claim 2
Dependent Claim
78 words
A heat recoverable article comprising: (a) a fabric cover comprising (i) a first set of fibres which are heat recoverable, and (ii) a second set of fibres which are multifilament fibres, at least some of which multifilament fibres are provided, individually, with a substantially continuous coating of a non-conductive polymeric material, and (b) a second polymeric material applied to the fabric, to render the article substantially impervious to the passage of liquid through the thickness of the article.
Claim 3
Dependent Claim
15 words
An article according to claim 1, in which the second set of fibres are heat-stable.
Claim 4
Dependent Claim
14 words
An article according to claim 2, in which the heat stable fibres comprise glass.
Claim 5
Dependent Claim
31 words
An article according to claim 1 in which the first set of fibres provide the weft of the fabric and the second set of fibres provide the warps of the fabric.
Claim 6
Dependent Claim
15 words
An article according to claim 1 which is in the form of a tubular sleeve.
Claim 7
Dependent Claim
33 words
An article according to claim 5, wherein the first set of fibres extend around the circumference of the tubular sleeve, and the second set of fibres extend along the length of the sleeve.
Claim 8
Dependent Claim
16 words
An article according to claim 1, in which the fabric comprises a weave, braid, or knit.
Claim 9
Dependent Claim
33 words
An article according to claim 1, in which at least one of the first set of fibres, the coating of the second set of fibres, and the second polymeric material comprise a polyolefin.
Claim 10
Dependent Claim
27 words
An article according to claim 1, in which the coating on the second set of fibres is compatible with, preferably the same as, the second polymeric material.
Claim 11
Dependent Claim
30 words
An article according to claim 1, in which second polymeric material is in the form of a layer or layers bonded to one or both major surfaces of the fabric.
Claim 12
Dependent Claim
29 words
An article according to claim 5, in which the second polymeric material is in the form of a single laminate layer applied to the outside of the tubular article.
Claim 13
Dependent Claim
24 words
An article according to claim 1, in which the second polymeric material is in the form of a matrix through which the fabric extends.
Claim 14
Dependent Claim
23 words
An article according to claim 10, in which the second polymeric material and/or the coating on the second set of fibres is cross-linked.
Claim 15
Dependent Claim
25 words
An article according to claim 1, in which the thickness of the polymeric coating on the second set of fibres is at least 0.05 mm.
Claim 16
Dependent Claim
19 words
An article according to claim 1, in which the sleeve has an internal coating of a heat activatable adhesive.
Claim 17
Dependent Claim
26 words
An article according to claim 1, in which the polymeric coating on the second set of fibres has a resistivity of at least 10 10 ohm.cm.
Claim 18
Dependent Claim
32 words
An article according to claim 1, in which the recoverable fibres of the first set of fibres have a recovery stress of at least 1.5 MPa and preferably at most 5 MPa.
Claim 19
Dependent Claim
13 words
An article according to claim 1, having a uniform cross-section along its length.
Claim 20
Dependent Claim
18 words
An article according to claim 1, having a cross-section which changes in shape or area along its length.
Claim 21
Dependent Claim
15 words
An article according to claim 1, having a recovery ratio of between 1.1:1 and 6:1.
Claim 22
Dependent Claim
81 words
An article according to claim 1 made by (i) fabricating a fabric from a first set of fibres which are heat recoverable, and a second set of fibres which are multifilament fibres and at least some of which multifilament fibres are coated with a continuous layer of a non-conductive polymeric material and (ii) applying to the fabric sufficient amount of a second polymeric material to render the fabric substantially impervious to the passage of liquid through the thickness of the fabric.
Claim 23
Dependent Claim
83 words
A method of making an article according to claim 1, comprising (i) fabricating a fabric cover from a first set of fibres which are heat recoverable, and a second set of fibres which are multifilament fibres and at least some of which multifilament fibres are coated with a continuous layer of polymeric material and (ii) applying to the fabric sufficient amount of a second polymeric material to render the article substantially impervious to the passage of liquid through the thickness of the article.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-03-27 | 1992-09-26 | 1993-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-27 | 1996-09-26 | 1997-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-27 | 2000-09-26 | 2001-03-28 | $7700.00 | Window Closed / Lapsed |