Moisture-impermeable electric conductor

Details Moisture-impermeable electric conductor Moisture-impermeable electric conductor

1991-05-22

1992-09-29

Nimmo, Morris H.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Making electrical conductors of indefinite length

156 51, 174 23R, 174 24, 174120SC, H01B 1332

Patent

active

051511436

ABSTRACT:
In the manufacture of a cable core comprising a moisture-impermeable multi-wire conductor, the conductor is stranded in a conventional manner and, after a fluid-impermeable layer of plastics material has been extruded over the conductor to form the core, the core is wound around the hub of a cable drum in such a way that each end of the wound core is exposed and accessible. One exposed end of the wound core is sealed and air is evacuated from the conductor interstices by a vacuum pump cemented to the other exposed end of the wound core. A source of semi-conductive moisture-impermeable compound in a liquid or semi-liquid state is then connected to the exposed end of the wound core and moisture-impermeable compound is drawn into and flows along the evacuated conductor interstices until the interstices are filled throughout the length of the core. The moisture-impermeable compound in the interstices is then permitted to solidify or thicken to such an extent that it will not readily flow from the conductor.

REFERENCES:
patent: 2698353 (1954-12-01), Carr et al.
patent: 3589121 (1971-06-01), Mulvey
patent: 3615959 (1971-10-01), Nance
patent: 4125741 (1978-11-01), Wahl et al.
patent: 4407854 (1983-10-01), Pan
patent: 4435613 (1984-03-01), Gaubert
patent: 4791240 (1988-12-01), Marin et al.
patent: 4963645 (1990-10-01), Marciano-Agostinelli et al.

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