G - Physics – 03 – G
Patent
G - Physics
03
G
314/32
G03G 15/08 (2006.01) G03G 15/06 (2006.01)
Patent
CA 1198765
ABSTRACT This invention is generally directed to an improved apparatus and an improved process for charging insulating toner particles to either a positive or negative polarity, and an electrostatographic imaging system containing such apparatus, the apparatus including a means for transporting insulating toner particles, and a means for injecting charges into the insulating toner particles, the means for transporting, and the means for injecting, being charged to a predetermined potential. More specifically, in one embodiment the apparatus of the present invention is comprised of a roller means containing a coating thereon, a toner supply means containing therein uncharged insulating toner particles, a charge injecting means, a voltage source means for said charge injecting means, and a voltage source means for said roller means, wherein charges are injected from said charge injecting means into the uncharged insulating toner particles deposited on said roller means, said injection accomplished in a charging zone encom- passed by said roller means and said charge injecting means. The process of the present invention comprises providing uncharged insulating toner particles on a means for transporting said particles, followed by contacting the particles with a means for injecting charges into the insulating toner particles, the means for transporting and the means for injecting being charged to a predetermined potential, wherein charges are injected into the uncharged insulating toner particles. Subsequently, the charged insulating toner particles can be deposited on an imaging member containing an image thereon.
405757
Hays Dan A.
Wayman William H.
Sim & Mcburney
Xerox Corporation
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