Image forming apparatus

Details Image forming apparatus Image forming apparatus

1990-10-30

1992-03-31

Moses, R. L.

Photocopying

Contact printing

Light boxes

355246, 118689, G03G 1506

Patent

active

051012316

ABSTRACT:
A toner is locally concentrated on a portion of the interior of an image forming apparatus when, e.g., a door of the apparatus is opened/closed or its power source is switched on, resulting in a nonuniform toner concentration. This nonuniform toner concentration is uniformized by consuming the toner within a predetermined time period by forced printing. A variation in toner concentration can be restored at a high speed, thereby preventing formation of a defective image caused by a variation in toner concentration.

REFERENCES:
patent: 4977428 (1990-12-01), Sakakura et al.

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