Adhesive bonding and miscellaneous chemical manufacture – Methods – Making electrical conductors of indefinite length
Patent
1997-08-11
1999-03-30
Lorin, Francis J.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Making electrical conductors of indefinite length
156 51, B65H 8106
Patent
active
058883231
ABSTRACT:
A waterproof cable having a plurality of conductive strands which are twisted together to form a wire core which is surrounded by an insulation layer. A water-absorptive swellable powder is applied to the individual strands prior to twisting and thereby is introduced into the interstices between adjacent strands. If water attempts to enter the spaces between the strands, it is absorbed by the powder which swells to occupy all the space and thereby seals the cable against further water penetration. The cable is produced by application (e.g. by spraying) of a solution of the powder in a solvent to the individual strands. Thereafter, the solvent is evaporated, leaving the powder adhered to the strand surfaces. In a preferred form of the Invention, regions containing the powder are longitudinally spaced apart from adjacent regions having no powder therein. In a more preferred form of the Invention, the powder is removed from the outer surface of the wire core prior to coating with insulation. This facilitates stripping of the insulation layer when and where needed.
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Itoh Takashi
Yasukuni Jun
Bierman Jordan B.
Lorin Francis J.
Sumitomo Wiring Systems Ltd.
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