Yarn false twisting apparatus

Details Yarn false twisting apparatus Yarn false twisting apparatus

1982-09-30

1985-05-28

Petrakes, John

Textiles: spinning, twisting, and twining

Apparatus and processes

False twist device

57337, 57339, 57348, D02G 108

Patent

active

045192049

ABSTRACT:
A yarn false twisting apparatus is disclosed which comprises a flexible disc mounted for rotation with a cooperating rigid disc to define a twisting zone therebetween. A pressure applying member is positioned adjacent the back face of the flexible disc for biasing the disc toward the rigid disc locally at the twisting zone so as to firmly engage the yarn passing through the twisting zone. The flexible disc comprises a hub portion disposed adjacent the center of the disc, an annular ring disposed concentrically about the hub portion and including a yarn engaging friction surface on one face thereof, and a distinct and highly flexible junction portion joining the hub portion and annular ring. The highly flexible junction portion permits the annular ring to readily flex in the lateral direction, to thereby permit the deflecting force to be minimized, while still permitting the rotating torque to be transmitted to the annular ring without significant circumferential deformation. The annular ring may also be divided into segments by radial or circumferential slots, to further reduce its resistance to the lateral deforming force of the pressure applying member, and to provide a substantially linear contact with the running yarn.

REFERENCES:
patent: 3156084 (1964-11-01), Van Dijk et al.
patent: 3373554 (1968-03-01), Raschle
patent: 4339915 (1982-07-01), Dammann et al.
patent: 4370853 (1983-02-01), Bauer et al.
patent: 4402179 (1983-09-01), Dammann et al.
patent: 4406116 (1983-09-01), Maier
patent: 4408449 (1983-10-01), Bauer et al.

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