Textiles: spinning – twisting – and twining – Apparatus and processes – False twist device
Patent
1981-06-12
1983-02-01
Petrakes, John
Textiles: spinning, twisting, and twining
Apparatus and processes
False twist device
57105, 57339, 57348, D02G 108
Patent
active
043708528
ABSTRACT:
A yarn false twisting apparatus is disclosed which comprises a support bracket which mounts a pair of twist imparting circular discs, and drive means including a whorl rotatably mounted to the support bracket so as to be tangentially contacted by a drive belt mounted to the central frame of a twisting machine. The support bracket is mounted to the central frame for pivotal movement 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 to the yarn. Preferably, one of the discs is composed of a thin flexible material, and a pressure applying member is mounted on the support bracket for biasing the flexible disc toward the other disc locally at the twisting zone. In the disclosed embodiment, the discs are also adjustably 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 advance speed may be varied.
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Hartig Wolfgang
Oberstrass Detley
Weber Klaus
Barmag Barmer Maschinenfabrik AG
Petrakes John
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