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:
Oct. 27, 1987
Filed:
Jun. 17, 1985
Katsumi Hasegawa, Kusatsu, JP;
Michio Ohno, Kusatsu, JP;
Tadahito Nagayasu, Nagoya, JP;
Kazuo Umeda, Nagoya, JP;
Toray Industries, Inc., Tokyo, JP;
Abstract
A thermoplastic polymer is melt-spun into a spinning tube decompressed to not more than 0.7 atm and withdrawn therefrom to the outer air through a narrow groove provided in a bottom sealing body which substantially seals the interior of the spinning tube from the outer air. The bottom sealing body is provided with a plurality of regulating chambers communicating with the groove, which chambers are controlled to have interior pressures of intermediate values between those of the spinning tube and the outer air, whereby the pressure pulsation of an air stream flowing into the interior of the spinning tube from the outer air through the groove can be avoided. This, in turn, ensures a smooth spinning operation and uniform yarn quality.