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:
Jan. 11, 1977
Filed:
Feb. 27, 1976
Arnold Steck, Wattwil, CH;
Heberlein Maschinenfabrik AG, Wattwil, CH;
Abstract
A friction false-twist device for texturing textile yarns of thermoplastic synthetic material comprises a main friction element mounted to rotate about a first fixed axis and formed as a sphere or ellipsoid with at least one circular groove centered on the axis, into which projects the rim of a friction disc rotatable about a second fixed axis parallel to the first. Yarn to be twisted is wrapped partially over the curved surface of the main friction element and past the edge of the friction disc to a yarn-guide unit adjustable over substantially half the curved surface of the main friction element at a constant distance from that surface. The yarn-guide unit includes a guiding disc which causes the yarn to deviate after leaving the main friction element. To avoid excessive yarn tension the guide unit is adjusted to provide a comparatively small wrap angle over the curved surface during threading, and is then adjusted to provide a larger wrap angle for effective twisting. The yarn-guide unit may be mounted to slide on an arcuate rail along which it can be locked in any position. To absorb high tension that may arise at the beginning of false twisting, a buffer such as a spring may be interposed between the yarn guide unit and an adjustable abutment.