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:
Feb. 24, 2009
Filed:
Nov. 13, 2006
Applicant:
Yves Bader, Thoiry, FR;
Inventor:
Yves Bader, Thoiry, FR;
Assignee:
E. I. du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D02G 3/36 (2006.01);
U.S. Cl.
CPC ...
Abstract
A substantially torqueless composite dual core-spun yarn () is produced by introducing two slivers (A,B) forming a covering () together with a central () core in a spinning triangle (). The core () is fed overtwisted S or Z and the slivers (A,B) have an opposite Z or S twist corresponding to about 30% to 70% of the twist of the fed overtwisted core () that detwists during spinning. The inelastic core () is fed at controlled speed to compensate for the angle of feed and to compensate for detwisting, and is guided into the spinning triangle () by a guide groove () in a feed roller ().