Photocopying – Contact printing – Light boxes
Patent
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.
Kabushiki Kaisha Toshiba
Moses R. L.
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