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:
Oct. 22, 2002
Filed:
Apr. 18, 2001
Gerhard Kempf, Frasnacht, CH;
Hamel AG, Arbon, CH;
Abstract
A method for the manufacture of an elastic twisted yarn has at least one outer yarn wound or twisted around an expanded, elastic core yarn. In a first process step the outer yarn is wound around the core yarn with a winding speed providing less than the nominal twist of the finished twisted yarn. The thus formed intermediate yarn is wound up and then twisted in the same direction of rotation in a second process step. In the first process step the outer yarn is wound with the help of a double-pot spindle at a winding rate providing a twist of above 50% of the nominal twist without forming a balloon around the core yarn, and the second process step is carried out on a double-twist spindle.