Photocopying – Contact printing – Light boxes
Patent
1989-02-03
1990-02-27
Prescott, A. C.
Photocopying
Contact printing
Light boxes
355277, 355281, G03G 1516
Patent
active
049050486
ABSTRACT:
A color copying apparatus which comprises: a latent image forming device for forming a latent image of a figure to be printed; an image forming medium on which the latent image is formed; a plurality of development devices for developing the latent image formed on the image forming medium by a different color toner, respectively; and an endless conveyor belt spanning between two rollers and for carrying a transfer material to which the developed colored toner image is transferred from the image forming medium. The copying apparatus is featured to comprise a first shifting system for shifting a whole of the conveyor belt close to and away from the image forming medium and a second shifting system for shifting a part of the conveyor belt close to and away from the image forming medium at a position where the toner image is transferred from the image forming medium to the transfer material. In accordance with the featured structure of the present invention, it becomes possible to slightly shift the conveyor belt away from the image forming medium in the copying operation, while in the maintenance operation it is possible to shift the conveyor belt sufficiently away from the image forming medium for facilitating the maintenance operation.
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patent: 4751549 (1988-06-01), Koizumi
Prescott A. C.
Ricoh & Company, Ltd.
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