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. 16, 1977
Filed:
Nov. 11, 1975
Applicant:
Inventors:
Patrick Joseph Duncan, Hendersonville, TN (US);
Francis Edward Scrivener, Jr, Chester, VA (US);
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D02G / ; D02G / ;
U.S. Cl.
CPC ...
5714 / ; 5715 / ; 260 / ; 428397 ;
Abstract
Draw-false-twist texturable polyester yarns are provided which have filaments having 6-10 essentially symmetric lobes of equal length equispaced around the central axis of the filament, a modification ratio of from 1.17 to 1.85 and a denier per filament between 3.8 R.sub.o and a maximum value which is a function of the modification ratio, the number of lobes and the factor R.sub.o which is a nominal draw ratio. Less than 12% of the draw-false-twist textured filaments have flattened cross-sectional peripheries greater than 10 microns in length.