Patent ID: 6658220
Filing Date: 2003-12-02
Classification: G03G

Abstract:
An image forming apparatus comprising:an image bearing member; image forming means for forming an image on said image bearing member; a contact transferring member for transferring the image on said image bearing member onto a transferring medium; transferring current applying means for applying a current to said contact transferring member; and control means for controlling an amount of the current applied by said transferring current applying means; wherein images formed on said image bearing member are transferred in a superposed manner onto the transferring medium when the transferring medium is conveyed between said image bearing member and said contact transferring member, and wherein said control means determines an amount of current to be applied to said contact transferring member based on: an image ratio in a direction perpendicular to a direction in which the transferring medium is conveyed, of an image that has already been transferred onto the transferring medium, an image ratio in a direction perpendicular to a direction in which the transferring medium is conveyed, of an image on said image bearing member, and an image ratio in a direction perpendicular to a direction in which the transferring medium is conveyed, of a portion in which the image that has already been transferred and the image on the image bearing member overlap.