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:
Jun. 21, 1983
Filed:
Jul. 20, 1981
Tadakazu Endo, Ohtsu, JP;
Shigemitsu Saitoh, Ohtsu, JP;
Toray Industries, Inc., Tokyo, JP;
Abstract
Disclosed is a method of making a thick-and-thin fiber or fibers, wherein the fineness thereof changes gradually and periodically along the longitudinal direction thereof. The method comprises (1) a step wherein molten fiber forming polymer is extruded through spinneret holes at a constant throughput, (2) a step wherein the extruded filaments run through a short gaseous gap whose length is in the range of 0.1 to 6 millimeters before they plunge into liquid for abrupt solidification by cooling, (3) a step wherein the solidified undrawn filaments are touched by at least one vibrating substance before being withdrawn at a constant speed, (4) a step wherein the undrawn filaments are drawn by some roller systems, and (5) a step wherein the drawn filaments are thermally set.