Photocopying – Contact printing – Light boxes
Patent
1992-04-22
1994-09-27
Smith, Matthew S.
Photocopying
Contact printing
Light boxes
355327, 346 48, 346157, G03G 1501
Patent
active
053511158
ABSTRACT:
A color electrophotographic apparatus employing a plurality of image forming units each including a photoreceptor and a corona charger, and using toner. In the apparatus, the image forming units are arranged to be displaceable, with an exposure position of an exposure device and a transfer position of a transfer paper holding member being fixed. During image formation, the image forming unit is moved to a predetermined position, and the obtained color image transferred onto paper sheet on a transfer paper holding member. Each of the image forming unit has a first image forming position confronting the transfer paper holding member, and a second image forming position different from the first image forming position.
In the color electrophotographic method of the present invention, when a photoreceptor using time in each single color image forming process for the color image formation is represented by T, and time for electrostatically resting the photoreceptor until the next use of the photoreceptor is denoted by t, the process in the relation of T<t is repeated. By this electrophotographic arrangement, a compact color electrophotographic apparatus simple in construction may be obtained, with a high speed operation during the single color image formation, and favorable nature for maintenance. Furthermore, by the apparatus of the present invention, stable images may be obtained even during continuous use, without fatigue of the photoreceptor and undesirable temperature rise.
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English Abstract of Japanese patent 2-156260 dated Jun. 15, 1990.
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Terada Hiroshi
Yamamoto Hajime
Matsushita Electric - Industrial Co., Ltd.
Smith Matthew S.
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