Developing unit having capability of efficiently exchanging deve

Details Developing unit having capability of efficiently exchanging deve Developing unit having capability of efficiently exchanging deve

1992-07-22

1994-05-10

Moses, R. L.

Coating apparatus

Control means responsive to a randomly occurring sensed...

Responsive to condition of coating material

355246, G03G 1506

Patent

active

053104234

ABSTRACT:
A developing unit comprises a magnet roller, a stirring roller, a carrying screw, a toner density sensor, and a sensor level adjusting device. When feeding or exhausting the developing powder, the rollers and screw are driven at a slower or faster rotary speed than the speed given when developing an image. After the supply of the developing powder is terminated, the rotary speed of the rollers and the screw is changed to the speed given for developing an image. After a certain time is elapsed, the adjusting device serves to start the level adjustment when the sensor produces a stable output.

REFERENCES:
patent: 3574301 (1971-04-01), Bernhard
patent: 4219271 (1980-08-01), Ohkubo et al.
patent: 4885223 (1989-12-01), Enoki et al.
patent: 4947473 (1990-08-01), Kinashi
patent: 4970557 (1990-11-01), Masuda et al.
patent: 5005517 (1991-04-01), Fukui et al.
Abstract of Japanese Document (Kokai) 61-39061 Published Mar. 1986.

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