| 摘要 |
PURPOSE:To always obtain an image having a good quality, by providing a control means for temporalily inhibiting variable control of the power a fixing device when an exposure lamp of a copying machine is turned on, and stabilizing the quantity of light in the course of exposure. CONSTITUTION:To a fixing heater 16, electric power is supplied through a solid state realy 13 from an electric power supply 14. To an exposure lamp 19, a thyristor 18 is connected in series, the gate of the thyristor 18 is controlled by a triggering circuit 20, and the quantity of light is controlled freely. As for the fixing heater 16, variable control of its power is inhibited when the exposure lamp 19 is turned on. |
