Photocopying – Contact printing – Light boxes
Patent
1994-12-09
1996-02-20
Braun, Fred L.
Photocopying
Contact printing
Light boxes
G03G 1501
Patent
active
054933870
ABSTRACT:
Highlight color images are created in a single pass using a light lens copier. Image exposure is accomplished using light/lens scanning of a multi-color original together with simultaneous shunting. Using a special photoreceptor configuration and a sequence of image creation steps including the aforementioned simultaneously shunting and exposure step, balanced latent images are formed across the photoreceptor structure. By balanced is meant that latent images exist across both an overcoat layer of the photoreceptor and the rest of the photoreceptor. Such an arrangement precludes development of the image across the overcoat layer if the photoreceptor were to be moved past a development system. Thus, an electrostatic voltmeter used to read the surface potential in the image areas would read zero or near zero volts. Following formation of a plurality of balanced images, each of the balanced images is, one at a time, caused to become unbalanced prior to its movement past an appropriate development system. Such unbalancing is effected using a low resolution ROS or other suitable exposure device. Each low resolution ROS would provide full exposure sufficient to discharge the photoreceptor leaving the portion of the latent image potential of interest across only the overcoating thereby enabling its development.
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Post Richard L.
VonHoene Donald C.
Braun Fred L.
Xerox Corporation
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