Title:
磨耗保護
Document Type and Number:
Japanese Patent JP4413279
Kind Code:
B2
Abstract:
The use of a fabric sheath (2), or other article, on a conduit (1), for example a pipe or flexible hose, to provide abrasion resistance or other forms of protection, for example impact protection or cut-through protection, thereto; and fabric sheaths suitable for such use. A preferred form of circumferentially-heat-shrinkable sheath of woven fabric, capable of use on a conduit, for example to provide impact cushioning and/or abrasion resistance, provides a substantially unobscured outer fabric surface and comprises hoop filaments extending substantially circumferentially around the sheath, at least some of which hoop filaments are heat-shrinkable, and length filaments extending substantially along the sheath, wherein the length filaments are selectedeither (A) to be sufficiently flexible, at least at temperatures to which they are subjected during heat-shrinking of the sheath in use, for the heat shrinkage of the hoop filaments to crimp the length filaments to an extent (a) producing at least 1%, preferably at least 2%, more preferably at least 5%, longitudinal shrinkage of the sheath in addition to any longitudinal heat shrinkage thereof and/or (b) causing portions of the length filaments either (i) to project outwardly from the shrunken fabric sheath to a maximum distance in excess of the maximum projection distance of the thus-shrunken hoop filaments, or (ii) to increase such excess projection distance if already existing before the heat shrinkage;or (B) to be sufficiently stiff to limit the longitudinal shrinkage due to crimping of the length filaments to less than 10%, preferably less than 5%, more preferably less than 2%, especially less than 1% or substantially zero.
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Inventors:
Drink water, Ian Clive
Lowe, Frank James
Ryder, Alan George
Lowe, Frank James
Ryder, Alan George
Application Number:
JP50247398A
Publication Date:
February 10, 2010
Filing Date:
June 06, 1997
Export Citation:
Assignee:
RAYCHEM LIMITED
International Classes:
F16L57/00; B29C61/06; D03D3/02; D03D15/58; F16L11/00; F16L47/22; G02B6/44
Domestic Patent References:
| JP4682U | ||||
| JP8504608A | ||||
| JP4735349B1 |
Foreign References:
| US3669157 |
Attorney, Agent or Firm:
Kyousei Tamura
Samejima Mutsumi
New exemption victory
Samejima Mutsumi
New exemption victory