US4865892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dimensionally recoverable article
Assignee: Raychem Ltd
•
Filing: 1987-08-03
•
Granted: 1989-09-12
•
Expires: 2007-08-03
Abstract
Abstract A dimensionally recoverable article, preferably a heat-recoverable article, for providing an electromagnetic shield as a shielding layer which comprises an electrically conductive fabric. The fabric may be a non-woven fabric formed from electrically conductive fabrics or it may be a fabric that has been coated, for example with a metal, after it has been formed in order to render it electrically conductive.
Inventors
- 👤 Philip R. Winfield
- 👤 Nigel R. Bates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:23
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0073; H05K9/0081; H05K9/009; H01; H01R; H01R13/00; H01R13/648; H01R13/658; H01R13/6598; H01R13/6599; H02; H02G; H02G15/00; H02G15/08; H02G15/18; H02G15/184; H02G15/188; H01R4/00; H01R4/70; H01R4/72; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1328; Y10T428/1331; Y10T428/25; Y10T442/00; Y10T442/60; Y10T442/654; Y10T442/655; Y10T442/657
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
46 words
A dimensionally recoverable article for enclosing at least part of an object and providing an electro magnetic shield, the article having a shielding layer which comprises non-woven fabric that has been coated with an electrically conductive material to render it sufficiently conductive to provide electro-magnetic shielding.
Claim 2
Dependent Claim
46 words
A dimensionally recoverable article for enclosing at least part of an object and providing an electro magnetic shield, the article having a shielding layer which comprises non-woven fabric that has been coated with an electrically conductive material to render it sufficiently conductive to provide electro-magnetic shielding.
Claim 3
Dependent Claim
34 words
An article as claimed in claim 1, including electrically conductive fibers selected from the group consisting of metalic fibres, nonconductive fibres coated with an electrically conductive material, inherently conductive polymer fibres, or combinations thereof.
Claim 4
Dependent Claim
24 words
An article as claimed in claim 2, wherein the fabric has a density in the range of from 12 to 1800 kgm -3 .
Claim 5
Dependent Claim
25 words
An article as claimed in claim 2, wherein the shielding layer has a weight in the range of from 60 to 1200 gm -2 .
Claim 6
Dependent Claim
31 words
An article as claimed in claim 2, wherein the fibres are formed from an electrically non-conductive material and have been coated with an electrically conductive material to render them electrically conductive.
Claim 7
Dependent Claim
30 words
An article as claimed in claim 1, wherein the fabric has an open structure in order to enable it to conform to the configuration of the article during recovery thereof.
Claim 8
Dependent Claim
13 words
An article as claimed in claim 1, wherein the fabric comprises polymeric fibres.
Claim 9
Dependent Claim
15 words
An article as claimed in claim 5, wherein the electrically conductive material comprises a metal.
Claim 10
Dependent Claim
25 words
An article as claimed in claim 6, wherein the uncoated fabric has a density in the range of from 2 to 300 kgm -3 .
Claim 11
Dependent Claim
21 words
An article as claimed in claim 1, wherein the shielding layer has from 20 to 500 gm -2 of conductive material.
Claim 12
Dependent Claim
22 words
An article as claimed in claim 1, wherein the fabric has a thickness in the range of from 0.5 to 5 mm.
Claim 13
Dependent Claim
19 words
An article as claimed in claim 1, wherein the fibres in the fabric are bonded together at link points.
Claim 14
Dependent Claim
28 words
An article as claimed in claim 12, wherein the fibres of the fabric have a mean link point separation in the range of from 0.1 to 2 mm.
Claim 15
Dependent Claim
23 words
An article as claimed in claim 1, wherein the proportion of the fabric volume occupied by the fibres is not more than 10%.
Claim 16
Dependent Claim
16 words
An article as claimed in claim 1, wherein the fabric is impregnated with a fusible material.
Claim 17
Dependent Claim
15 words
An article as claimed in claim 15, wherein the fusible material is a hot-melt adhesive.
Claim 18
Dependent Claim
19 words
An article as claimed in claim 15, wherein the fusible material substantially fills the free space of the fabric.
Claim 19
Dependent Claim
14 words
An article as claimed in claim 15, wherein the fusible material is electrically non-conductive.
Claim 20
Dependent Claim
15 words
An article as claimed in claim 15, wherein the fusible material comprises a thermosetting adhesive.
Claim 21
Dependent Claim
41 words
An article according to claim 1, wherein the non-woven fabric is selected from the group consisting of a non-woven electrodeposition fabric, non-woven electroplated fabric, a non-woven fabric impregnated with a coating formed from a conductive particle loaded polymer, or combinations thereof.
Claim 22
Dependent Claim
42 words
A dimensionally recoverable article for enclosing at least part of an object, the article having an internal layer which comprises a fabric that is formed at least partly from electrically conductive fibres, the fabric being impregnated with a fusible electrically non-conductive material.
Claim 23
Dependent Claim
42 words
A dimensionally recoverable article for enclosing at least part of an object, the article having an internal layer which comprises a fabric that is formed at least partly from electrically conductive fibres, the fabric being impregnated with a fusible electrically non-conductive material.
Claim 24
Dependent Claim
41 words
An article according to claim 21 wherein the fabric is formed from fibres selected from the group consisting of electrodeposition of fibres, electroplating on fibres, impregnating the fibres with a coating formed from a conductive particle loaded polymer, or mixtures thereof.
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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) | 1992-09-11 | 1993-03-13 | 1993-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-11 | 1997-03-13 | 1997-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-11 | 2001-03-13 | 2001-09-12 | $7700.00 | Window Closed / Lapsed |