Patent ID: 6684036
Filing Date: 2004-01-27
Classification: G03G

Abstract:
An image forming apparatus comprising:charging means for charging an image carrier; exposure means for exposing image on the charged image carrier for forming a latent image; at least one developing device, the at least one developing device including a plurality of developing rollers arranged in opposition with a surface of said image carrier and biasing applying means for applying a developing bias to the plurality of developing rollers, for supplying a developer on the image carrier and forming a developed image on the image carrier; transfer means for transferring the developed image formed on the image carrier onto a printing medium; a potential sensor provided downstream side of moving direction of the image carrier relative to the developing device for detecting a potential on the image carrier; and control means for setting the developing bias to a value restricting disturbance of a potential at a portion of the image carrier detected by the potential sensor when the portion of the image carrier passes across the developing device.