False twisting method and apparatus for producing crimped filame

Details False twisting method and apparatus for producing crimped filame False twisting method and apparatus for producing crimped filame

1979-09-19

1981-02-03

Watkins, Donald

Textiles: spinning, twisting, and twining

Apparatus and processes

False twist device

57348, D02G 104, D01H 792

Patent

active

042480388

ABSTRACT:
False twisting method and apparatus of nipping type for producing crimped filament yarns, comprising two flat endless belts supported, under tension, on two pairs of pulleys, respectively, so as to run in different directions relative to each other and having work surfaces of a relatively small friction coefficient and straightly extending regions defined between their mating supporting pulleys and crossing each other at a selected angle to provide a crossing zone, while being urged, with a desired pressure of contact, against each other at this crossing zone for positively nipping thereat a filament yarn to thereby twist this filament yarn, while urging this filament yarn to advance progressively from the crossing zone.

REFERENCES:
patent: 3045416 (1962-07-01), Ubbelohde
patent: 3659408 (1972-05-01), Burr
patent: 3910025 (1975-10-01), Takai
patent: 4047373 (1977-09-01), Takai
patent: 4144701 (1979-03-01), Takai et al.

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