| 摘要 |
PURPOSE:To heat a fixing roller at the time of starting energization and a member to be heated when a start operation possible state is obtained, up to a temperature set for use respectively by reading a signal from a fixing roller temperature sensor and a temperature sensor for the member to be heated and controlling the heat generation of a heating means and a fixing heater. CONSTITUTION:When the switch of a copying machine 1 is turned on, that is, the energization is started, the temperature of the fixing roller 4 is detected by a fixing roller temperature sensor 6 just after the fixing heater 5 is turned on and simultaneously, the temperature of a barrel for heating/melting 31 is detected by a temperature sensor for a toner recovering device 7. At this time, a warm up time until the temperature of the fixing roller 4 becomes the temperature set for use is calculated by a heater control circuit 85. Simultaneously with it, the warm up time until the temperature of the barrel for heating/melting 31 becomes the temperature set for use is calculated by the heater control circuit 85. The heater control circuit 85 controls the heat generation, with respect to the fixing heater 5 and a heater for a toner recovering device 32, from the two calculation results. |
