Patent ID: 7949269

Claim:
An image forming apparatus comprising: a belt member; a first image forming unit and a second image forming unit that are configured to form toner images on the belt member; a transfer member that is rotatable and is configured to press the belt member to transfer toner images from the belt member onto a recording material; a brush member configured to come into contact with the transfer member to remove toner from the transfer member; and a controller configured to control image forming conditions of at least one of the first and second image forming units; the controller is capable of executing a first image forming mode wherein the first image forming unit and the second image forming unit form respective toner images on the belt member, the first image forming unit transfers a control toner image to a first region of the belt member, and the second image forming unit transfers another control toner image to a second region of the belt member, the first region displaced from the second region in a rotational axis direction of the transfer member; and the controller is capable of executing a second image forming mode wherein the first image forming unit does not form toner images on the belt member and the second image forming unit forms toner images on the belt member, and responsive to the second image forming unit forming a control toner image, toner images are disposed on both the first and second regions of the belt member, and one of the toner images is the control toner image.