Patent ID: 6785485
Filing Date: 2004-08-31
Classification: G03G

Abstract:
An image forming device comprising:a photosensitive drum adapted for supporting a static-electric latent image on its surface; a developing roller adapted to bear developer, the developing roller being disposed in confrontation and in contact with the surface of the photosensitive drum; a photosensitive drum driver that drives rotation of the photosensitive drum; a developing roller driver that drives rotation of the developing roller; a drive controller that controls the developing roller driver to stop driving the developing roller and maintain the developing roller in a non-rotating condition while controlling the photosensitive drum driver to drive the photosensitive drum to rotate, the drive controller also controlling the photosensitive drum driver to start rotation of the photosensitive drum when the developing roller is stopped; a charge unit that charges the surface of the photosensitive drum to a uniform charge; an exposure unit that exposes the uniformly-charged surface of the photosensitive drum to form the static-electric latent image on the surface of the photosensitive drum; and a developing bias application unit that applies a developing bias to the developing roller during image forming periods, wherein the drive controller, during the portion of the non-image forming period when the drive controller controls the developing roller driver to stop driving and the photosensitive drum driver to drive, controls: the charge unit to uniformly charge the surface portion of the photosensitive drum; the exposure unit to not perform exposing operations; and the developing bias application unit to apply a bias to the developing roller the same as the developing bias applied during image forming periods.