Title: Process and apparatus for imparting coherence to tow

Abstract: Process and apparatus for increasing the coherency of a filamentary tow by passing a tow through a turbulent fluid zone exerting a braking and vortical action on the filaments, and withdrawing the tow. Apparatus for forming the turbulent zone comprises fluid streams directed into a funnel-shaped treating chamber so that a major portion of the spent fluid discharges in a direction opposite to the tow motion. Tow delivery apparatus for delivering the tow to the treatment preferably includes a jet device for opening and forwarding the tow.

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Inventors: Hawkins, William Edward (Circleville, OH, US)

Application Number: 814492
Filing Date: 1969-03-03
Publication_date: 1977-02-01
Assignee: E. I. Du Pont de Nemours and Company (Wilmington, DE)
Primary Class(es): 57/350 28/104, 28/274, 28/282, 57/90, 57/333, 57/352
Other Classes:
US Patent Ref:

2805765	Sep, 1957	Saum et al.	28/21.
2859506	Nov, 1958	Slayter	57/34.
3081951	Mar, 1963	Dyer et al.	28/1.
3095343	Jun, 1963	Berger	28/1.
3099594	Jul, 1963	Caines et al.	28/1.
3110151	Nov, 1963	Buntin, Jr. et al.	57/157.
3116588	Jan, 1964	Breen et al.	57/157.
3116589	Jan, 1964	Edwards et al.	57/157.
3262181	Jul, 1966	Hawkins et al.	28/1.
3296785	Jan, 1967	Hardy	57/34.

Other Refs:
Primary Examiner: Petrakes, John
Assistant Examiner:
Attorney: