Patent ID: 6240270
Filing Date: 2001-05-29
Classification: G03G

Abstract:
An electrophotographic apparatus in which a potential division developing method is used having an image area where a background potential difference is set larger than a developing potential difference, the electrophotographic apparatus comprising:a photosensitive body having a surface;a charger for uniformly charging the photosensitive body;an exposure unit forming at least a high potential area, an intermediate potential area and a low potential area on the surface of the photosensitive body;a first developing unit including a plurality of first developing rollers for moving a plurality of first color particles to one of the high potential area and the low potential area on the photosensitive body; anda second developing unit including a second developing roller for moving a plurality of second color particles to the other one of the high potential area and the low potential area on the photosensitive body,wherein the rotation direction of at least one of the plurality of first developing rolls is matched with the moving direction of the surface of the photosensitive body; andthe rotation direction of at least one of the plurality of first developing rolls is made opposite to the moving direction of the surface of the photosensitive body.