| 摘要 |
PROBLEM TO BE SOLVED: To make a stabilized excellent image formation to be successively performed by letting recovery of transfer residual toner by an electrostatic charging device efficiently performed, uniform property of charge potential on the image carrier improved, stable charge even with regard to the low humidity environment, and the fast image carrier peripheral speed, with respect to the transfer type image forming device of the contact electrostatic charge method-cleaner less processing. SOLUTION: When assuming the electrostatic charging member 2A of the electrostatic charging device performing the charge of the image carrier 1 by applying charge bias on the charging member 2A held in contact with the image carrier 1 as the first charging member, provided with the charging member 2A held in contact with the image carrier 1 as the first charging member, the device is made so that the image carrier surface potential Vs at the time of rushing to the charging part N by applying voltage on the second charging member 12, the DC voltage Vdc1 applied on the first charging member 2A of the charging device the same polarity, and provided with the second charging member 12 held in contact with the image carrier between a transfer part T and a charging part N provided, so as to satisfy the next relation, |Vs|>=|Vdc1|. |
