Method of and apparatus for extrusion

Details Method of and apparatus for extrusion Method of and apparatus for extrusion

1987-02-09

1988-09-27

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156500, 264262, 26427211, 264279, 2642791, 425113, 4251331, 4253781, B29B 4702

Patent

active

047739541

ABSTRACT:
A method of and apparatus for simultaneously extruding a coating comprising a plurality of layers of dissimilar plastic compounds having substantially different melting points onto a moving electrical conductor wherein the plastic compounds are mechanically and thermally separated. Separating the two plastics prevents thermal degradation of the two extrudates by causing their melt temperatures to remain substantially constant.

REFERENCES:
patent: 3305893 (1967-02-01), Machen
patent: 3538547 (1970-11-01), Drabb
patent: 3737491 (1973-06-01), Nicholson
patent: 4585407 (1986-04-01), Silver et al.

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