ELECTROPHOTOGRAPHIC IMAGING SYSTEM AND TORQUE SUPPORTING METHOD

PROBLEM TO BE SOLVED: To restrain the slip of a belt at the time of driving the belt. SOLUTION: A belt driving module and a corresponding method include or adopt the belt moving along a path, at least one supporting roller or another structural body to support the belt when the belt is moved along the path, a driving roller to move the belt along the path, a tension roller to apply tensile force to the belt in order to maintain the coupling of the belt with the driving roller and/or the supporting roller, at least one processing station (for example, image processing station) arranged along the path in order to perform a process related to the specified position of the belt, and a torque supporting and driving part to apply torque supporting force Td at a position between the driving roller and the tension roller. The torque supporting force Td makes the exact positioning of the belt easy by reducing the slip between the driving roller and the belt.