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. 28, 1986
Filed:
Apr. 08, 1983
Toray Industries, Inc., Tokyo, JP;
Abstract
The thermal shrinkage properties of yarn are measured by applying heat treatment to the yarn while it travels through a straight yarn path formed between a feed roller and a draw roller. The peripheral speed of the feed roller is set at a desired constant peripheral speed V.sub.1. The tension T of the yarn is detected at the downstream of the feed roller, and the peripheral speed of the draw roller is controlled at a speed V.sub.2 so that the detected tension T becomes equal to a desired preset tension T.sub.0 of the yarn. The thermal shrinkage S(%) is measured through the computation of S=[(V.sub.1 -V.sub.2)/V.sub.1 ].times.100. If the controlling of the peripheral speed V.sub.2 of the draw roller is effected so that V.sub.2 /V.sub.1 =a desired constant value, the detected tension of the yarn can be used for measuring the thermal shrinkage stress of the measured yarn.