Developing apparatus

Details Developing apparatus Developing apparatus

1990-02-05

1991-12-03

Grimley, A. T.

Photocopying

Contact printing

Light boxes

118689, 118692, 355208, 355209, 355326, G03G 2100

Patent

active

050703684

ABSTRACT:
A developing apparatus which includes a plurality of developing units individually provided with sensors for detecting amounts of toner accommodated therein, includes a judging device for judging whether or not sensor outputs of other developing units are below a replenishable amount when a sensor output of one developing unit falls below a replenishing requiring amount, and a replenishing display device for urging toner replenishment, based on the result of the above judgement, with respect to the developing unit having the sensor output below the replenishing requiring amount and the developing unit whose sensor output is below the replenishable amount.

REFERENCES:
patent: 3910232 (1975-10-01), Kondo et al.
patent: 4647185 (1987-03-01), Takeda et al.
patent: 4897690 (1990-01-01), Takano
patent: 4951091 (1990-08-01), Nawata

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