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:
Sep. 08, 1998
Filed:
Mar. 27, 1997
Jurgen Lorenz, Berlin, DE;
Axel Vischer, Augsburg, DE;
Abstract
A tow of melt spun filaments and a method for treating such filaments to produce a tow of uniformly crimped filaments having a high initial modulus by heat setting and stuffer box crimping includes the steps of heat-setting the tow, spraying the hot-heat-set tow with an aqueous fiber finish to effect shocklike cooling of the tow, passing the sprayed tow to a pair of squeeze rolls in whose nip it is kneaded through using a defined nip pressure and squeezed off to a fiber finish pickup of 0.7 to 7% by weight of the tow weight, heating the squeezed-off moist tow on a heated multiroll arrangement in such a way that it leaves the multiroll arrangement with a moisture content of 0.5 to 5% by weight of the tow weight and a temperature of 40.degree. to 1000.degree. C., feeding the tow with this moisture content and this temperature to a crimping machine and crimping it.