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:
May. 24, 1977
Filed:
Aug. 13, 1975
Applicant:
Inventors:
David E Bosley, Grifton, NC (US);
Patrick J Duncan, Hendersonville, TN (US);
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D01F / ;
U.S. Cl.
CPC ...
264 78 ; 260 / ; 264211 ;
Abstract
Polyester texturing feed yarns are produced by preparing an ethylene terephthalate polymer from ethylene glycol plus a small amount of diethylene glycol, and dimethyl terephthalate or terephthalic acid, and melt-spinning the polymer into filaments. The filaments may be partially oriented by spinning at high speed without cold drawing, or may be fully drawn after conventional spinning. The diethylene glycol is added in controlled amounts to provide uniform dyeability in fabrics prepared from the yarn after texturing.