Photocopying – Including fiber optics
Patent
1983-12-12
1988-05-10
Prescott, A. C.
Photocopying
Including fiber optics
355 3CH, 355 3R, G03G 1500, G03G 1508
Patent
active
047439378
ABSTRACT:
This invention is generally directed to an apparatus for charging toner particles comprised in operative relationship of a means for charging insulating toner particles and a means for transporting insulating toner particles, said means for charging and said means for transporting being charged to a predetermined potential, which apparatus further includes therein a brush device for delivering toner particles to a charging nip situated between the means for charging the toner particles and the means for transporting the toner particles. The brush device can also function as a charging source for the toner particles, and as a cleaning system. More specifically in one embodiment the present invention is directed to an apparatus for simultaneously metering, charging and transporting non-magnetic insulating toner particles comprising in operative relationship a metering roll means, an optional trim blade means for said metering roll means, a toner supply reservoir means containing therein weakly charged insulating toner particles possessing about an equal number of positive and negative charges thereon, a transporting hard roll or donor belt means, a triboelectrically active coating contained on said transporting means, a drive roll means, an idler means, a tensioning means, an imaging means, a voltage source means for the metering roll means, a voltage source means for the drive roll means, and the transporting means, said metering roll means moving in a direction opposite to the direction of movement of the transporting means, and wherein the apparatus further includes a moving brush means contained in the toner supply reservoir which brush means contains bristles thereon, wherein the brush transports toner particles to a charging nip situated between the metering roll means and the transporting means.
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Palazzo E. O.
Prescott A. C.
Warren D. S.
Xerox Corporation
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