Image forming apparatus having a gap regulating mechanism to...

Details Image forming apparatus having a gap regulating mechanism to... Image forming apparatus having a gap regulating mechanism to...

2006-06-28

2008-10-14

Chen, Sophia S (Department: 2852)

Electrophotography

Having particular structure

Modular or displaceable

C399S126000

Reexamination Certificate

active

07437094

ABSTRACT:
An image forming apparatus includes: a main frame; a developing unit, the developing unit including a photosensitive drum to form an electrostatic latent image on an outer surface thereof, a developing roller installed at one side of the photosensitive drum to develop the formed electrostatic latent image, and a developer plate having a drum shaft support groove to support both ends of a photosensitive drum shaft supporting the photosensitive drum and a roller shaft support groove to support both ends of a developing roller shaft supporting the developing roller; and a gap regulating mechanism to vary a gap between the photosensitive drum and developing roller in response to attachment/detachment of the developing unit to/from the main frame. Such image forming apparatus can promote preventing a migration phenomenon that low molecular weight elements leak out from particles constituting the developing roller or photosensitive drum, or that the rollers are squeezed.

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