| 摘要 |
PROBLEM TO BE SOLVED: To obtain stable transfer without transfer omission even when an image to be transferred is changed by controlling a charge amount supplied to a photoreceptor from a transfer electrode charge supply means based on photoreceptor inflow current and photoreceptor outflow current. SOLUTION: A current IMC flowing to the linear electrode 2b of an electrification part 2 detected by a current detection means 10a, a current IDEV flowing to the developing roller 3b of a developing part 3 detected by a current detection means 10b, a current ICL flowing to the cleaning roller 6b of a cleaning part 6 detected by a current detection means 10c, a current IWCS flowing to the shielding electrode 2a of the electrification part 2 detected by a current detection means 10d, and a current LCLS flowing to the shielding electrode 6c of the cleaning part 6 detected by a current detection means 10e are respectively fed to an arithmetic circuit 11. A transfer current control means 9 controls a power source 5 so that a transfer current It calculated by the circuit 11 is compared with a specified set value stored in a ROM 12 and the transfer current is made approximate to the set value. |
