Yarn false twisting apparatus having adjustable friction discs

Details Yarn false twisting apparatus having adjustable friction discs Yarn false twisting apparatus having adjustable friction discs

1981-06-12

1983-02-01

Petrakes, John

Textiles: spinning, twisting, and twining

Apparatus and processes

False twist device

57105, 57339, D02G 108

Patent

active

043708510

ABSTRACT:
A yarn false twisting apparatus is disclosed which comprises a pair of cooperating friction discs which define a twisting zone between opposed friction surfaces thereof. One of the discs is composed of a thin flexible material, and a pressure applying member is mounted adjacent the back side of the flexible disc for biasing the disc toward the other disc locally at the twisting zone to firmly engage the yarn passing therethrough. The discs are laterally movable with respect to each other, and the pressure applying member is movable in a direction perpendicular to the movement of the discs, such that the ratio of twist insertion to yarn speed may be varied. In one illustrated embodiment, the discs and pressure applying member are interconnected for effecting synchronized relative movement, and these components are mounted on a support bracket which is pivotal through 180 degrees to thereby permit selective operation in a first position wherein S twist is imparted to the yarn and a second position wherein Z twist is imparted.

REFERENCES:
patent: 2863280 (1958-12-01), Ubbelohde
patent: 3156084 (1964-11-01), Van Dijk et al.
patent: 3225533 (1965-12-01), Henshaw
patent: 3373554 (1968-03-01), Raschle
patent: 3394540 (1968-07-01), Bentov
patent: 3488941 (1970-01-01), Asaka
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patent: 4047374 (1977-09-01), Venot
patent: 4050229 (1977-09-01), Hayahusa
patent: 4145871 (1979-03-01), Iwata et al.
patent: 4149366 (1979-04-01), Bass et al.
patent: 4240248 (1980-12-01), Raschle
patent: 4339915 (1982-07-01), Dammann et al.

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