Method and apparatus for insulating electrical conductor

Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Measuring a weight or volume

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Details

264 405, 264 407, 264174, 425113, 425140, 425141, 425191, 425192R, 425465, 425466, B29C 4792

Patent

active

047088370

ABSTRACT:
Extrusion apparatus for conductor wire in which a core tube for guiding the wire is controllably movable axially so as to adjust the cross-sectional area of the flow passage for molten polymeric dielectric material moving towards the die orifice. The use of the adjustable core tube minimizes the degree of draw down of the conductor wire.

REFERENCES:
patent: 2669754 (1954-02-01), Chadbourne
patent: 3254369 (1966-06-01), Ehrlich
patent: 3402427 (1968-09-01), Christofas et al.
patent: 3502752 (1970-03-01), Brown
patent: 3538547 (1970-11-01), Drabb
patent: 3646186 (1972-02-01), Hager
patent: 4257991 (1981-03-01), Kirjavainen
patent: 4592881 (1986-06-01), Kyriakis
patent: 4605525 (1986-08-01), Baxter
patent: 4659424 (1987-04-01), Baxter et al.

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