| 摘要 |
PURPOSE:To enable setting of three rolls to an optimum pressing position in the stage of starting a copying machine by providing a means for controlling the driving means o the copying machine at a prescribed speed irrespectively of the printing speed setting of the copying machine in the stage of strating the copying machine. CONSTITUTION:When the operator turns of the power source switch of a copying machine which is off, a solenoid 46 operates and a plunger 47 is pulled downward aganist the energizing force of a spring 44 and a cam 48 fixed to a cam shaft 34 rotates in an arrow direction. When the shaft 34 rotates further, cams 38, 39 push respectively upward one end of levers 2o, 22 to separate three rolls (developing soln. feed roll 12, developing roll 14 and pressing roll 16). When the three rolls 12, 14, 16 arrive at the prescribed separating position, a microswitch 32 turns off and the power source of the copying machine is turned off. The plunger 47 of the solenoid 46 returns to the home position and a projection 41 engages with a projection 48b. |
