Apparatus and method for reducing image background in...

Details Apparatus and method for reducing image background in... Apparatus and method for reducing image background in...

G - Physics

03

G

314/15

G03G 13/04 (2006.01) G03G 15/04 (2006.01) G03G 15/045 (2006.01)

Patent

CA 1039792

ABSTRACT OF THE DISCLOSURE To enhance copy quality in an electrostatic type copier or reproduction machine, the photoconductive surface bearing the latent electrostatic image of the original being copied is, before development, exposed to a second charge generating device producing a relatively low charge opposite in polarity to the original charge. The aforesaid second charge is desirably equal to or less than the image background voltage, and serves to reduce overall image charge and thereby neutralize to a large extent the image background voltage without changing or upsetting the image voltage contrast. A low emission scorotron positioned between imaging and develop- ing stations may serve as the second charge generating device.

206592

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