Density sensing and controlling equipment

Details Density sensing and controlling equipment Density sensing and controlling equipment

1974-05-31

1976-08-31

Newton, Dorsey

Textiles: fiber preparation

Working

Drafting

D01H 538

Patent

active

039770460

ABSTRACT:
Apparatus in a card for sensing and controlling the relative speeds of the feed and doffer rolls in accordance with the sliver density. A mechanical sensing device responds to the cross-section of the sliver to close the contacts of an electrical circuit when the cross-section deviates from an acceptable range. On contact closure, the circuit provides an electrical signal to the drive arrangement of the feed and doffer rolls to vary the roll speeds thereby effecting a correction in sliver cross-section.

REFERENCES:
patent: 3402433 (1968-09-01), Schwalm
patent: 3827106 (1974-08-01), Varga
patent: 3852848 (1974-12-01), Feller

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