Patent ID: 8131203
Filing Date: 2012-03-06
Classification: G03G

Abstract:
1. An image forming apparatus comprising: a transfer unit configured to transfer a toner image that has been formed by an image forming unit to a sheet; a fixing unit configured to fix the toner image that has been transferred by the transfer unit to the sheet; a sheet conveyance path, provided between the transfer unit and the fixing unit, guiding the sheet onto which toner image has been transferred by the transfer unit to the fixing unit; and a loop detection unit configured to detect a loop formed on the sheet in the sheet conveyance path, wherein a difference of sheet conveyance speeds between the transfer unit and the fixing unit is adjusted according to a signal from the loop detection unit, and the loop detection unit includes: wherein the control unit controls, until a leading edge of the sheet conveyed by the transfer unit reaches the fixing unit, the movement mechanism to move the detecting member to a retracting position from the sheet conveyance path so as not to abut against the sheet, and after the leading edge of the sheet reaching the fixing unit, the movement mechanism to move the detecting member to a protruding position into the sheet conveyance path to be movable by pressure received from the sheet.