Friction disc for false twisting apparatus

Details Friction disc for false twisting apparatus Friction disc for false twisting apparatus

1976-04-13

1977-04-19

Watkins, Donald E.

Textiles: spinning, twisting, and twining

Apparatus and processes

Receiving twist type

D02G 108

Patent

active

040180417

ABSTRACT:
A friction disc for an apparatus for the false twisting of threads such as, for example, for crimping synthetic threads, has a thread engaging surface with a high co-efficient of friction and a convexly curved asymmetrical profile which is divided into three portions, each portion forming an arc of a circle having a different radius of curvature, the portion at the thread entry face extending over an arcuate length of about 90.degree. up to the apex of the profile and having a radius of curvature equal to between 0.4S and 0.5S, while the intermediate portion of the profile has a radius of curvature substantially equal to S and the portion of the profile at the thread exit face has a radius of curvature equal to between 0.075S and 0.1S, S being the thickness of the disc.

REFERENCES:
patent: 3811258 (1974-05-01), Batsch
patent: 3872661 (1975-03-01), Eaves
patent: 3901011 (1975-08-01), Schuster
patent: 3932985 (1976-01-01), Naylor
patent: 3940914 (1976-03-01), Schuster
patent: 3965661 (1976-06-01), Yoshida

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