Patent ID: 6243544
Filing Date: 2001-06-05
Classification: G03G

Abstract:
An apparatus for forming an image, comprising:a developing unit for forming a visible image on a photosensitive member with a developer mix;transfer means for transferring the visible image to a transfer medium;a developer mix adhesion amount sensor which faces the photosensitive member and detects an adhesion amount of developer mix adhered on the photosensitive member;transfer bias application means for applying, to said transfer means, a first transfer bias for transferring the visible image on the photosensitive member to said transfer means, and a second transfer bias for reversely transferring the visible image on said transfer means to the photosensitive member; andtransfer bias change means for, when the visible image is transferred to said transfer means by the first transfer bias and an adhesion amount of residual transfer developer mixwhich is not transferred and is left on the photosensitive member is detected by said developer mix adhesion amount sensor, changing the first transfer bias using the detected adhesion amount of residual transfer developer mix, and when an adhesion amount of reverse transfer developer mix upon reversely transferring the visible image on said transfer means to the photosensitive member by the second transfer bias is detected by said developer mix adhesion amount sensor, changing the second transfer bias using the detected adhesion amount of reverse transfer developer mix.