Patent ID: 8731425

Claim:
An image forming apparatus comprising: an image carrier configured to carry a developer image; a conveyance belt configured to convey a recording sheet via a position opposing the image carrier; a belt cleaner configured to remove matters adhered to the conveyance belt; a driving unit configured to drive the image carrier and the conveyance belt; a bias applying unit configured to apply a cleaning bias to the belt cleaner; and a controller configured to control the driving unit and the bias applying unit such that when the image carrier is driven at a first speed and the conveyance belt is driven at a speed corresponding to the first speed, the cleaning bias is applied to the belt cleaner, and when the image carrier is driven at a second speed slower than the first speed and greater than zero and the conveyance belt is driven at a speed corresponding to the second speed, the cleaning bias is not applied to the belt cleaner.