Patent ID: 7430393

Claim:
A belt feeding apparatus comprising: an endless belt; a supporting member for rotatably supporting the belt; setting means for setting, when said belt is deviated from a widthwisely normal zone, an inclination angle of said supporting member to a return angle to return said belt toward the normal zone, and for setting, when said belt is in the normal zone, the inclination angle of said supporting member to a balance angle to keep said belt in the normal zone; detecting means for detecting the deviation of said belt from the normal zone; and counting means for counting time elapsing from said belt returning into the normal zone, wherein said setting means switches the inclination angle of said supporting member from the balance angle to the return angle when said detecting means detects said belt, and said setting means switches the inclination angle of said supporting member from the return angle to the balance angle when the time counted by said counting means reaches a set time.