Optical switching scheme for SCD donor roll bias
AssigneeXerox Corporation
InventorDelmer G. Prker
Life of this patent
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Abstract
A non-interactive or scavengeless development system for use in color imaging. To control the developability of lines and the degree of interaction between the toner and receiver, an AC voltage is applied between a donor roll and two sets of interdigitated electrodes embedded in the surface of the donor roll to enable efficient detachment of toner from the donor to form a toner cloud. An optical switching arrangement effects an electrical connection between a slip ring and one set of interdigitated electrodes.
Claims16
A donor structure for developing latent electrostatic images on a charge retentive surface with toner particles, said structure comprising:
- two sets of interdigitated electrodes carried by said donor structure;
- a source of electrical power;
- means for effecting movement of said structure in an endless path such that a surface thereof passes through a development zone intermediate said charge retentive surface and said donor structure;
- means for electrically connecting said source of power to one set of said electrodes;
- means carried by the surface of said donor structure and a member supported stationarily adjacent said donor structure for electrically connecting said source of power to the other set of electrodes whereby said source of electrical power can be selectively applied to said other set of electrodes whereby electrical power is applied to both sets of electrodes simultaneously.
Dependencies are inferred from the claim text.