Density sensing and controlling equipment

Details Density sensing and controlling equipment Density sensing and controlling equipment

1974-12-20

1976-10-12

Gill, James J.

Textiles: fiber preparation

Working

Drafting

73 32A, 73 676, 73 69, 73160, G01N 924, D01H 538

Patent

active

039848957

ABSTRACT:
Apparatus in a card for sensing and controlling the relative speeds of the feed and doffer rolls in accordance with the sliver density as sensed by error detection circuitry responding to the amount of a transduced compression wave in the sonic ultrasonic range which passes through the sliver.

REFERENCES:
patent: 2843882 (1958-07-01), Lewis et al.
patent: 2966057 (1960-12-01), Heller
patent: 3088175 (1963-05-01), Aoki
patent: 3470734 (1969-10-01), Agdur
patent: 3562866 (1971-02-01), Roberson et al.
patent: 3822590 (1974-07-01), Tharpe et al.

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