Thomas D Williamson: Wet tow crimping process. E I Du Pont de Nemours and Company, April 15, 1980: US04197622 (3 worldwide citation)

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 ...

John S Dickins III, Thomas D Williamson: Yarn winding apparatus and process. E I Du Pont de Nemours and Company, February 13, 1990: US04899944

A string-up system and apparatus, using a novel dual-slotted traverse guide, with preferential string up of a first yarn in the one slot, associated with transfer means to move a yarn, if desired, out of the first slot, so this yarn is strung up in the second slot.