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. 25, 1992
Filed:
Mar. 04, 1991
Applicant:
Inventor:
Benjamin C Sze, Wilmington, DE (US);
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D01D / ; D01D / ;
U.S. Cl.
CPC ...
264555 ; 2642102 ; 2642108 ; 26421114 ; 425 722 ;
Abstract
An improved melt spinning process for preparing nylon filaments wherein the freshly-extruded filaments enter an enclosed zone that is maintained at superatmospheric pressure by a controlled flow of air at low positive pressure and the filaments leave the zone through a constriction, either a venturi or a tube, assisted by the cocurrent flow of such air at a high controlled velocity.