Electrophotographic image forming apparatus including means for

Details Electrophotographic image forming apparatus including means for Electrophotographic image forming apparatus including means for

1992-10-23

1993-11-30

Grimley, A. T.

Photocopying

Contact printing

Light boxes

355214, 355246, 358300, 358458, G03G 2100

Patent

active

052669971

ABSTRACT:
A toner sensor measures the amount of toner attached onto a photosensitive drum upon development by a developing unit. A controller compares the measured toner attaching amount with a predetermined reference value, and executes processing for changing at least one of image forming conditions, for example, the charging amount by a charger, the developing bias voltage of the developing unit, the exposure amount of an optical system, and the toner density of the developing unit, on the basis of the comparison result.

REFERENCES:
patent: 4318610 (1982-03-01), Grace
patent: 4975747 (1990-12-01), Higuchi
patent: 5107302 (1992-04-01), Bisaiji
patent: 5148289 (1992-09-01), Nishiyama et al.
patent: 5206686 (1993-04-01), Fukui et al.
patent: 5212560 (1993-05-01), Hattori et al.

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