Method and apparatus using traveling wave potential waveforms for separation of opposite sign charge particles

摘要

An apparatus for developing a latent image recorded on an imaging surface, including a donor member, spaced from the imaging surface, for transporting toner on the surface thereof to a region opposed from the imaging surface, the donor member includes an electrode array on the outer surface thereof, the array including a plurality of spaced apart electrodes extending substantial across width of the surface of the donor member; loading toner onto the donor member; a multi-phase voltage source operatively coupled to the electrode array, the multiphase voltage source generating a waveform which creates an electrodynamic wave pattern for moving toner particles of one polarity to and from a development zone and preventing toner particles of the opposite polarity from moving on to the development zone.