Method of providing a thick concentric envelope on an electrical

Details Method of providing a thick concentric envelope on an electrical Method of providing a thick concentric envelope on an electrical

1974-11-25

1976-06-22

White, Robert F.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

174120R, 264 27, 264 93, 264104, 264174, 264235, 264236, B29C 2500, B29F 310

Patent

active

039652262

ABSTRACT:
Insulation is extruded onto a conductor and immediately quench-cooled to obtain solidification for retaining concentricity of conductor and envelope. The envelope is reheated under pressure to melt a surface zone, followed by gradual cooling whereby the melted zone migrates into the interior. Reheating under pressure and gradual cooling, possibly also under pressure, improves texture, and provides for a more ordered crystal structure and/or fuller crosslinking. Following extrusion, and on reheating, the cable is freely suspended and assumes catenoidal contour while advancing to avoid sliding contact of the outer surface until adequately stable solidification has taken place.

REFERENCES:
patent: 3100136 (1963-08-01), D'Ascoli et al.
patent: 3130447 (1964-04-01), Karl et al.
patent: 3198868 (1965-08-01), Pedretti et al.
patent: 3479446 (1969-11-01), Arnaudin, Jr. et al.
patent: 3532783 (1970-10-01), Pusey et al.
patent: 3538207 (1970-11-01), Toole
patent: 3846528 (1974-11-01), Chrisman et al.
patent: 3849192 (1974-11-01), Schmidt

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