| 摘要 |
PURPOSE:To obtain an image forming device capable of securing excellent fixation at a first rise-up time in the morning by installing a temperature detecting element on a pressure roller for a fixing device and keeping the temperature of the pressure roller equal to or exceeding a prescribed temperature. CONSTITUTION:The temperature detecting element 10-9 is also installed on the pressure roller 10-4, and the temperature is controlled by transferring information on the temperature of the roller 10-4 to a CPU. When a power is supplied to the device at first, the heater 10-3 starts to be energized so that the temperature of the fixing roller may rise up to a standby temperature. And also, the temperature of the roller 10-4 is detected by the element 10-9, and when the temperature reaches the lower limit of a suitable temperature, a Ready signal is transmitted. Thus, a fixing operation is conducted in a state where a difference between the pressure roller temperature and the fixing roller temperature is comparatively small. At this time, by continuously conducting the operation without stopping heating when the fixing roller temperature reaches the standby temperature, the pressure roller temperature rapidly reaches the lower limit of the suitable temperature, so that it is made possible to transmit the Ready signal, then, a start-up time is shortened. |
