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:
Nov. 08, 1983
Filed:
Feb. 26, 1979
Edward B McClary, Charlotte, NC (US);
Fiber Industries, Inc., Charlotte, NC (US);
Abstract
An improved process is provided for the formation of a high performance polyester multifilament yarn possessing a high strength and an unusually stable internal structure rendering it particularly suited for use in industrial applications at elevated temperatures. The filaments are melt spun and uniformly quenched under relatively high stress conditions to yield an as-spun filamentary material of relatively high birefringence which is passed in-line from the quench zone to a first draw zone provided at a temperature below the glass transition temperature of the as-spun filamentary material, for example at ambient temperature, where it is drawn. Subsequent drawing follows to achieve at least 85 percent of the maximum draw ratio of the as-spun filamentary material.