Apparatus for applying two layers of plastic to a conductor

Details Apparatus for applying two layers of plastic to a conductor Apparatus for applying two layers of plastic to a conductor

1990-05-30

1992-10-20

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Surface bonding means and/or assembly means therefor

With casting, plastic molding, or extruding means

15624412, 264262, 26427211, 264279, 264259, 2642791, 425113, 425114, 4251331, 4253761, 4253781, 4253791, B29B 4702

Patent

active

051567156

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 and the conductor is centered in the plastic jackets by a center trim guide, said trim guide having replacable guide tips. 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: 3737490 (1973-06-01), Nicholson
patent: 4585407 (1986-04-01), Silver et al.
patent: 4798526 (1989-01-01), Briggs

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