Patent ID: 7031630

Claim:
An image forming device comprising: a fixing member that performs a fixing operation to fix a developer onto a fixing medium, the fixing member having a surface, the developer having a melting temperature that is a first temperature; a heater that generates heat to heat the fixing member; a first detecting member that detects a surface temperature of the fixing member; a driving member that rotates the fixing member; a contact member that constantly contacts the surface of the fixing member; a controller that controls the heater and the driving member, the controller determines whether or not the surface temperature of the fixing member has dropped below a third temperature after the surface temperature has previously reached a second temperature higher than the first temperature, the third temperature being equal to or higher than the first temperature and lower than the second temperature, wherein the controller controls the heater to start generating heat at a predetermined timing; when the surface temperature of the fixing member detected at the predetermined timing by the first detecting member is lower than the third temperature, the controller controls the driving member to start rotating the fixing member after the surface temperature of the fixing member exceeds the second temperature; and when the surface temperature of the fixing member detected at the predetermined timing by the first detecting member has not dropped below the third temperature after the surface temperature has previously reached the second temperature, the controller controls the driving member to start rotating the fixing member.