Pneumatic thread tensioning device

Details Pneumatic thread tensioning device Pneumatic thread tensioning device

1985-02-11

1987-01-20

Reynolds, Wm. Carter

Textiles: knitting

Feeding

Strand tensions

112DIG3, 139450, 242147A, D04B 1544, D03D 4734

Patent

active

046372296

ABSTRACT:
A pneumatic tensioning device (10) maintains a desired tension in a thread (18) as it is fed from a spool to a knitting or fabric weaving machine. A first tubular member (40) has an inner passageway (42) extending the length of the tube (40) that permits thread advancement therethrough. A second tubular member (46) surrounds the first tubular member (40) so that the inner walls of the second member and the outer walls of the first member define an outer passageway (48). An airflow is directed through the outer passageway in a direction that is the same as the direction of thread advancement. An orifice (54) communicates the airflow from the outer passageway (48) into the inner passageway (42) in a manner so that the direction of the airflow is reversed. The airflow thus flows in a direction that is opposite to thread advancement, wherein such opposing airflow causes a certain amount of tension in the thread.

REFERENCES:
patent: 2302790 (1942-11-01), Modigliani
patent: 3014356 (1961-12-01), Butler
patent: 3188713 (1965-06-01), Dyer et al.
patent: 3376901 (1968-04-01), Strake
patent: 4119253 (1978-10-01), Benson
patent: 4297834 (1981-11-01), Franzen

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