Image forming apparatus employing work function relationships

Details Image forming apparatus employing work function relationships Image forming apparatus employing work function relationships

2006-04-11

2006-04-11

Chapman, Mark A. (Department: 1756)

Electrophotography

Image formation

Photoconductive member

C399S176000, C399S222000, C399S252000, C399S281000, C399S284000, C430S111400

Reexamination Certificate

active

07027758

ABSTRACT:
An image forming apparatus including a latent image carrier and a developing means for charging a toner into a negative polarity by triboelectric charging, wherein the work function of the toner is set to be larger than the work function of the surface of the latent image carrier. When the apparatus includes an intermediate transfer medium, the work function of the toner is set to be larger than the work function of the surface of the intermediate transfer medium. In another embodiment, the work function ΦOPCof the surface of the latent image carrier, the work function Φtof the toner, and the work function ΦTMof the surface of the intermediate transfer medium are set to satisfy a relationship Φt>ΦOPC>ΦTM. These relationships help to reduce fog, and improve transfer efficiency which reduces the consumption of the toner.

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