Image forming apparatus having a plurality of developing devices

Details Image forming apparatus having a plurality of developing devices Image forming apparatus having a plurality of developing devices

1992-09-17

1994-03-15

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355208, 355327, G03G 1501

Patent

active

052949699

ABSTRACT:
Copying apparatus having a movable developing unit provided with a plurality of developing devices. This copying apparatus measures the mechanical characteristics of the drive mechanism driving the developing unit and determines if these characteristics deviate from normal values, and the drive signals transmitted to the drive mechanism are adjusted in accordance with the results of the measurement.

REFERENCES:
patent: 4894684 (1990-01-01), Nakajima et al.
patent: 4937626 (1990-06-01), Kohtani et al.
patent: 4958191 (1990-09-01), Yamada et al.
patent: 4970557 (1990-11-01), Masuda et al.
patent: 5014095 (1991-05-01), Yamada
patent: 5103764 (1992-04-01), Fujiwara et al.
patent: 5138398 (1992-08-01), Yamada
patent: 5182584 (1993-01-01), Fukunaga et al.

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