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. 15, 1980
Filed:
Aug. 17, 1978
Thomas D Williamson, Lugoff, SC (US);
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Abstract
Utilization of finish and recovery of materials for control of pollution are improved in a tow crimping process wherein an advancing tow of fibers which have been processed in an aqueous bath or series of aqueous baths is uniformly compressed in a confined space under a nip pressure of 600-1,000 lbs./in. to exude solvent-containing water from the tow, the exudate being returned to the last aqueous bath, a predetermined amount of finish is applied to the tow, the fibers are crimped in a stuffing box crimper whereby some of the finish and a small amount of residual moisture are exuded from the tow, the exudate is recovered and removed to a storage container, the exudate is re-applied to the tow at a rate corresponding to the rate of exudation and the crimped tow is collected and then dried.