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:
Aug. 18, 1998
Filed:
Jul. 03, 1997
Madeira Garnfabrik Rudolf Schmidt KG, Freiburg, DE;
Abstract
A process of making a low-shrinkage, air-textured yarn, in particular sewing yarn, of synthetic, pre-oriented polymer multifilaments, includes the steps of drawing multifilaments in the form of a single strand at a temperature of about 180.degree. to 230.degree. C. by a factor of 1.6 to 2.5, air-texturing the drawn strand at a rate of overfeed of 1.03 to 1.20 to form a single-strand raw yarn, feeding the raw yarn to a fluffing zone of predetermined length at a rate of overfeed of 1.003 to 1.025, winding the fluffy raw yarn at slightest possible tension, reeling off and twisting the wound raw yarn, and treating the twisted raw yarn at a temperature of 125.degree. to 135.degree. C. over 1 to 3 hours in a dyeing unit, and, optionally, dyeing the raw yarn. The process is equally applicable for making plied yarns.