| 摘要 |
PURPOSE:To prevent defective traveling by providing a 2nd temperature detecting member at a different position from a 1st temperature detecting member in the longitudinal direction of a heating body and controlling the feeding interval of the recording material at the time of consecutive heating based on the detecting output of the 2nd detecting member. CONSTITUTION:A heating layer 3 which is energized to generate heat is formed on a line along the longitudinal direction of a substrate 2 nearly in the center part of the rear surface of the substrate 2. Energizing electrodes (input terminals) 3a and 3b made of good electrically conductive material such as silver are provided at the left and the right ends of the heating layer 3. Then, the 2nd temperature detecting element 5B is provided at the different position from the 1st temperature detecting element 5A in the longitudinal direction of the heating body. Furthermore, an MPU 13 controls a heater driving circuit 14 at the time of fixing so that the detecting output of the thermistor 5A may be a specified fixed value and controls energizing of the heating layer 3. Based on the detection output of the thermistor 5B, the feeding interval of the recording material at the time of consecutive heating an image is controlled. In such a case, when the detected temperature exceeds a specified temperature, the feeding interval is made longer. |
