Photocopying – Contact printing – Light boxes
Patent
1994-01-31
1995-04-04
Beatty, Robert B.
Photocopying
Contact printing
Light boxes
118654, G03G 1508
Patent
active
054042089
ABSTRACT:
A developer unit for developing a latent image recorded on an image receiving member with marking particles, to form a developed image. The unit includes a donor member spaced from the image receiving member and adapted to transport marking particles to a development zone adjacent the image receiving member and an electrode positioned in the development zone between the image receiving member and the donor member. The developer unit also includes a biaser for electrically biasing the electrode with an alternating current having a frequency varying with time, so as to minimize natural frequency resonant vibrations of the electrode and to detach marking particles from the donor member forming a cloud of marking particles in the development zone with detached marking particles from the cloud of marking particles developing the latent image.
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Beatty Robert B.
Wagley John S.
Xerox Corporation
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