Method and apparatus for false twisting yarn in opened spinners

Details Method and apparatus for false twisting yarn in opened spinners Method and apparatus for false twisting yarn in opened spinners

1987-04-03

1988-12-20

Watkins, Donald

Textiles: spinning, twisting, and twining

Apparatus and processes

Open end spinning

57400, D01H 1135, D01H 7892

Patent

active

047917814

ABSTRACT:
In open-end rotor spinning, imparting lesser false twist to the yarn being formed as it revolves through the yarn receiving zone and greater false twist as it revolves away from the zone. This is accomplished by different frictional resistance surface characteristics on the surface of a navel, or by shaping the surface for lesser extent of yarn contact in one surface portion and greater extent of yarn contact in another surface portion.

REFERENCES:
patent: 3834147 (1974-09-01), Havranek et al.
patent: 3973382 (1976-08-01), Hirai
patent: 4068456 (1978-01-01), Landwehrkamp
patent: 4110961 (1978-09-01), Havel et al.
patent: 4385488 (1983-05-01), Raasch et al.

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