Developing apparatus, image forming apparatus, and process...

Details Developing apparatus, image forming apparatus, and process... Developing apparatus, image forming apparatus, and process...

2008-06-16

2011-12-06

Beatty, Robert (Department: 2852)

Electrophotography

Control of electrophotography process

Control of developing

C399S266000, C399S291000

Reexamination Certificate

active

08073350

ABSTRACT:
A disclosed developing apparatus employs a flare roller that is a toner carrier in which electrodes of two different phases are provided at fine intervals. Density irregularities or scumming in a developed image due to a potential difference between the flare roller and a latent image carrier are prevented by maintaining a constant potential on the flare roller surface. A voltage is applied to the electrodes on the flare roller such that an electric field that varies with time is generated between the electrodes, whereby a toner cloud is produced by the movement or hopping of toner over the flare roller. Thereby the toner attaches to a latent image on the latent image carrier, thus developing the latent image. In one embodiment, a bias with an average potential equal to an average potential of the bias applied to the electrodes is applied to a toner layer thickness regulating member.

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