Apparatus, process for charging toner particles

Photocopying – Including fiber optics

Patent

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355 3CH, 430120, G03G 1508

Patent

active

046182411

ABSTRACT:
An apparatus and process for charging toner particles wherein the apparatus contains in operative relationship a rotating means for metering insulating toner particles and a deflected charging means for transporting insulating toner particles, the means for metering, and the means for transporting being self-spaced by insulating toner particles situated therebetween, said means for metering and said means for transporting biased to a predetermined potential, and wherein the means for transporting contains a triboelectrically active coating thereon. Also disclosed are imaging devices incorporating these apparatuses and improved process for charging non-magnetic insulating toner particles which comprises (1) providing a rotating metering means, (2) providing a deflected transporting means containing a triboelectrically active coating thereover, (3) depositing weakly charged insulating toner particles on the transporting means, (4) contacting the weakly charged toner particles with the triboelectrically active coating, said contact occurring in a charging zone situated between the rotating means and the deflected transporting means, (5) causing the rotating means to move in a direction opposite to the direction of movement of the deflected transporting means, the rotating means and the means for transporting being self-spaced by the toner particles contained therebetween, wherein the toner particles are charged to an appropriate polarity in a charging zone situated between the rotating means and the deflected transporting means.

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