| 摘要 |
PURPOSE:To obtain satisfactory picture quality by appropriately switching the air quantity according to the number of sheets continuously copied. CONSTITUTION:At the end of copying the number of sheets set, a control part 20 causes a copying device to idle. When the number of copied sheets is less than 200, for instance, a changeover switch Sw is instantaneously switched to rotate a cooling motor M3 at low speed. If the number is over 200, the control part controls the motor M3 to switch to low speed from high speed after its number of revolution is delayed 30 sec, for instance. When copying continues more than 200 times, the interior temperature of the device does not exceed a prescribed temperature. If copying is performed again after 200 times, a copy with satisfactory picture quality can be obtained. |
