Photocopying – Contact printing – Light boxes
Patent
1988-03-01
1989-12-19
Grimley, A. T.
Photocopying
Contact printing
Light boxes
118645, 118657, 355204, 355215, 355245, 355251, 355326, G03G 1500, G03G 2100, G03G 1506, G03G 1501
Patent
active
048886190
ABSTRACT:
A multi-color image forming apparatus including an electrostatic latent image support member, a plurality of developing devices, an image forming device for forming an electrostatic latent image won the support member, a selector for selecting one of the developing devices, a pattern forming device for forming a latent image pattern on the support member separately from the electrostatic latent image in response to selection from an upstream developing device to a downstream developing device in a rotational direction of the support member by the selector and a control device which performs control such that the latent image pattern is located forwardly of the electrostatic latent image in the rotational direction of the support member, whereby after the latent image pattern has been passed through the upstream and downstream developing devices, the electrostatic latent image is developed by the downstream developing device.
REFERENCES:
patent: 4373800 (1983-02-01), Kamiyama et al.
patent: 4746954 (1988-05-01), Matuura et al.
patent: 4769675 (1988-09-01), Watanabe
Grimley A. T.
Minolta Camera Kabushiki Kaisha
Pipala Edward
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