Friction disc for driving twist tubes rotating at high speeds

Details Friction disc for driving twist tubes rotating at high speeds Friction disc for driving twist tubes rotating at high speeds

1975-10-28

1977-07-05

Queisser, Richard C.

Textiles: spinning, twisting, and twining

Apparatus and processes

Receiving twist type

74206, 74216, D01H 1243

Patent

active

040331067

ABSTRACT:
Friction discs for use in driving of guide rollers for twist tubes in false twist devices for texturing synthetic filaments are described in which the disc comprises a support disc of non-resilient material surrounded by a friction ring of synthetic resilient material that is tapered radially outward to the circumferential surface making contact with the twist tube. This enables the friction discs to be spaced more closely together in the roller and shorter twist tubes to be used. Centrifugal force on the friction ring is also reduced. Higher rotation speed are, therefore, achieved. The ratio of the width of the inner circumferential surface of the friction ring to the width of its surface engaging the twist tube is between 1.5:1 and 3:1. The support disc may be of metal alloy or consist of an inner disc of synthetic plastics material with an outer ring of metal alloy. In each case the metal alloy should have a modulus of elasticity of at least 6500 kp/mm.sup.2 and a tensile strength of at least 25 kp/mm.sup.2.

REFERENCES:
patent: 2855750 (1958-10-01), Schrenk et al.
patent: 3133449 (1964-05-01), Van Antwerp et al.
patent: 3458985 (1969-08-01), Richter
patent: 3613467 (1971-10-01), Lee
patent: 3821905 (1974-07-01), Chesmer et al.
patent: 3827229 (1974-08-01), Bieniok

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