Textiles: spinning – twisting – and twining – Apparatus and processes – False twist device
Patent
1981-06-12
1983-06-28
Petrakes, John
Textiles: spinning, twisting, and twining
Apparatus and processes
False twist device
57339, 57348, D02G 108
Patent
active
043898416
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 movable with respect to the pressure applying member such that the ratio of twist insertion to yarn speed may be varied. In one illustrated embodiment, the discs are mounted so as to permit selective placement on opposite sides of the pressure applying member and reversal of their direction of rotation, and such that either S twist or Z twist may be imparted, without changing the direction or location of the yarn advance.
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Barmag Barmer Maschinenfabrik AG
Petrakes John
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