Image forming apparatus with varied charge voltages

Details Image forming apparatus with varied charge voltages Image forming apparatus with varied charge voltages

2005-05-24

2005-05-24

Chen, Sophia S. (Department: 2852)

Electrophotography

Control of electrophotography process

Control of charging

C399S043000

Reexamination Certificate

active

06898385

ABSTRACT:
This invention provides an image forming apparatus where the useful life of the image carrier does not become significantly short. This system has a charging unit, a charge voltage loading unit, an exposure unit, a development unit, an image transfer unit and a control unit, wherein, when the transport interval of plural recording materials is shorter than a predetermined time the AC charge voltage applied to the image carrier during the transport interval is a first AC charge voltage, and when the transport interval is longer than the predetermined time the AC charge voltage applied to the image carrier during the transport interval being a second AC charge voltage, the control unit makes the current running in the charging unit when the second AC charge voltage is applied lower than the current running in the charging unit when the first AC charge voltage is applied.

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