Image forming apparatus including static pre-eliminator

Details Image forming apparatus including static pre-eliminator Image forming apparatus including static pre-eliminator

2006-01-24

2008-12-09

Royer, William J (Department: 2852)

Electrophotography

Supplemental electrophotographic process

Exposure or charging

Reexamination Certificate

active

07463849

ABSTRACT:
An image forming apparatus includes a photosensitive member being movable in a predetermined direction; a charging roller that charges a surface of the photosensitive member; and a static pre-eliminator that eliminates static electricity by irradiating the surface of the photosensitive member with light, the static pre-eliminator located on an upstream side of the charging roller in a direction of movement of the photosensitive member; wherein an arrangement and an exposure amount of the static pre-eliminator are set to satisfy E ≦0.025×exp(t/τ) where τis a residual time constant of a photo carrier generated in the photosensitive member by the static pre-eliminator, t is a time period from a time when the photosensitive member passes through the static pre-eliminator to a time when the photosensitive member is charged by the charging roller, and E is a normalized exposure amount of the static pre-eliminator.

REFERENCES:
patent: 6553196 (2003-04-01), Inoue
patent: 3-52058 (1991-08-01), None
patent: 6-348112 (1994-12-01), None
patent: 10-198132 (1998-01-01), None

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