| 摘要 |
PURPOSE:To improve image quality by controlling the transfer output of a primary transfer unit in each layer. CONSTITUTION:This full color copying machine is provided with a first sensor 28 detecting the sticking quantity of toner on a reference toner image formed on a photosensitive body, a second sensor 29 detecting the sticking quantity of the toner on the reference toner image transferred on a transfer intermediate body and a controller 27 setting the transfer output of the primary transfer roller 21 in each layer, based on the ratio of the outputs of both sensors 28 and 29, that is, the outputs of the second/first sensors and controlling the transfer output of the primary transfer roller 21 at the time of taking a copying action in each layer so as to obtain the set value. |
