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. 05, 1994
Filed:
Oct. 23, 1992
Applicant:
Inventors:
Shigeru Nakajima, Okayama, JP;
Tadao Marui, Kobe, JP;
Assignee:
Sumika-Hercules Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D01D / ; D01F / ;
U.S. Cl.
CPC ...
425 71 ; 425D / ; 264182 ; 264187 ; 264203 ;
Abstract
A novel spinning apparatus is provided with a tubular coagulating liquid flow control valve body made of an elastomeric material and whose inner diameter is changeable according to external pressure. The valve body has a simple structure and is easy to retrofit to a conventional spinning apparatus. When dope is extruded, a mass of dope with gelled skin can pass easily and quickly through the opened valve body so that the spinning workability at the start of spinning is high. Further, since the coagulating liquid flows smoothly, the spinning speed can be increased without damaging the filaments.