The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 05, 1977
Filed:
Oct. 28, 1975
Josef Raschle, Butschwil, CH;
Heberlein & Co. AG, , CH;
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.