Hiroki Takayanagi

Image forming apparatus capable of reducing time unable to perform image formation due to temperature change of image bearing member

Image forming apparatus including contact transfer member having transfer current controlled in accordance with ratio of image portion at transfer portion

Image forming apparatus with order-of image-transfer charge control feature

Method for determining proper bias voltage for transferring toner image from photoconductive drum to intermediate transfer belt and image forming apparatus incorporating the same

Image forming apparatus with cleaning voltage or current control based on density of a control toner image

Image forming apparatus with cleaning member

Image forming apparatus with a cleaning member to remove toner from a transfer roller

Image forming apparatus with voltage control

Image forming apparatus with resistance controlled transfer member

Image forming apparatus featuring first and second toner images with different charging amounts