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:
Apr. 18, 1995
Filed:
Nov. 22, 1993
Applicant:
Inventors:
Fred L Travelute, Charlotte, NC (US);
Robert E Hoffman, Catawba, SC (US);
Assignee:
Wellman, Inc., Shrewsbury, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D01D / ; D02G / ;
U.S. Cl.
CPC ...
264168 ; 264173 ; 26417714 ; 2642091 ; 2642093 ; 2642105 ; 2642108 ; 26421115 ; 26421117 ; 2643 / ;
Abstract
A method is disclosed of producing self-texturing filaments that exhibit a desirable tendency to coil rather than to bend sharply or zig zag. The method comprises directing a quenching fluid at extruded hollow filaments of a liquid polymer predominantly from one side of the hollow filaments to thereby produce hollow filaments with different orientations on each side. Thereafter the temperature of the hollow filaments is raised to a temperature sufficient for the filaments to relax, but less than the temperature at which the filaments would shrink.