Image forming machine

An image forming machine comprising a machine body housing, an image bearing member disposed within the machine body housing, a transfer device for transferring a toner image formed on the image bearing member to a transfer paper, a transfer paper feeder for feeding a transfer paper to the transfer device, a fixing means for fixing the toner image transferred to the transfer paper by the transfer device, and a discharge roller for discharging the transfer paper having the toner image fixed by the fixing means,

• the transfer device having a belt unit including a driving roller to be rotationally driven by a driving means, a driven roller disposed at a distance from the driving roller, and a transfer belt looped between the driving roller and the driven roller and disposed opposite the image bearing member;
• and a cleaning means including a cleaning blade to be pressed against the surface of the transfer belt to clean this surface, and a moving mechanism for moving the cleaning blade to an operating position where the cleaning blade is pressed against the surface of the transfer belt, and a non-operating position where the cleaning blade is separated from the transfer belt, wherein
• the image forming machine includes a safety detecting means for detecting the completion of setting of an opening/closing member constituting the image forming machine, and a controlling means for controlling the operation of the driving means for the driving roller on the basis of a signal from the safety detecting means, and
• when the safety detecting means signals the completion of the setting after signaling the incompletion of the setting, the controlling means controls the driving means so as to perform a reverse driving, thereby driving the driving roller reversely by a predetermined amount.