Patent ID: 8358959

Claim:
A fixing device for fixing a toner image on a recording medium, the fixing device comprising: a fixing roller; a separation roller provided downstream from the fixing roller in a recording medium conveyance direction; an endless fixing belt wound around at least the fixing roller and the separation roller; a pressing roller pressed against the fixing roller and the separation roller via the fixing belt to form a first nip portion between the fixing belt and the pressing roller through which the recording medium bearing the toner image passes; a first driving system connected to the fixing roller and the separation roller; and a second driving system connected to the pressing roller, the first driving system comprising: a first motor to generate a first driving force; and a first transmission to transmit the first driving force to the fixing roller and the separation roller, the second driving system comprising: a second motor to generate a second driving force; and a second transmission to transmit the second driving force to the pressing roller, the first transmission comprising a first one-way clutch via which the first driving force is transmitted to the fixing roller, the first one-way clutch idling to allow rotation of the fixing roller in accordance with rotation of the pressing roller when a circumferential velocity of the pressing roller is greater than a circumferential velocity of the fixing roller.