Photocopying – Contact printing – Light boxes
Patent
1991-12-23
1995-06-27
Grimley, A. T.
Photocopying
Contact printing
Light boxes
355271, 355274, G03G 1500
Patent
active
054284295
ABSTRACT:
An apparatus for enabling a laterally conductive, resistive backed photoconductive intermediate transfer member in an electrophotographic printing apparatus. The printing apparatus includes a toner transfer system having an intermediate transfer belt comprising a laterally conductive resistive substrate with a pre-transfer grounding device and a transfer charging device. A ground potential bias is applied to the intermediate transfer belt prior to entering a transfer nip region to generate low transfer fields therein. Subsequently, the laterally conductive resistive layer of the intermediate surface is provided with a biasing voltage, generating high transfer fields in the transfer nip. In an alternative embodiment, a post-transfer bias is applied to the intermediate transfer belt for substantially enhancing the transfer fields in the transfer nip.
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Dang Thu Anh
Grimley A. T.
Robitaille Denis A.
Xerox Corporation
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