Process and apparatus for manufacturing optical cable elements

Details Process and apparatus for manufacturing optical cable elements Process and apparatus for manufacturing optical cable elements

1982-12-20

1985-09-17

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Layered, stratified traversely of length, or multiphase...

264 15, 2642095, 2642356, 264346, 425114, B29F 310

Patent

active

045419795

ABSTRACT:
In the manufacture, for use in an optical cable element, of a tube of polymeric material, the drawn down extruded polymeric tube is annealed by causing it to travel through at least one elongate oven into which is injected, at a position intermediate of the ends of the oven, air or other gas which will have no deleterious effect on, and which is at a temperature sufficient to effect annealing of, the drawn down polymeric tube, and by directing the injected hot air or other gas on to the advancing drawn-down tube at a plurality of positions spaced along the length of the oven in such a way that turbulent flow and substantially even distribution of hot gas is provided around the advancing drawn-down tube. Use of this method of annealing enables the speed of manufacture to be at least twice the speed of manufacture hitherto achieved.

REFERENCES:
patent: 3829545 (1974-08-01), Van Vlaenderen
patent: 3886253 (1975-05-01), Friendship
patent: 4069286 (1978-01-01), Greenhalgh
patent: 4154783 (1979-05-01), Jackson

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