Image forming apparatus

Details Image forming apparatus Image forming apparatus

2008-11-26

2010-12-07

Porta, David P (Department: 2884)

Electrophotography

Supplemental electrophotographic process

Exposure or charging

Reexamination Certificate

active

07848679

ABSTRACT:
An image forming apparatus includes a standard exposure device (1) adjusted to emit light of a predetermined light quantity, and a control device configured to determine light quantity of the pre-charge exposure device in an image-forming period based on the first and the second charging current values, wherein first charging current value is detected when an area on a photosensitive member surface is recharged by the contact charging member, in a case where the photosensitive member is exposed by turning on the standard exposure device without turning on a pre-charge exposure device, and second charging current value is detected when an area on the photosensitive member surface is recharged by the contact charging member, in a case where the photosensitive member charged by applying a predetermined voltage by the contact charging member is exposed by turning on the pre-charge exposure device without turning on the standard exposure device.

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