| 摘要 |
PROBLEM TO BE SOLVED: To provide a high-quality full color image forming apparatus. SOLUTION: In the image forming apparatus 1 which has a latent image carrier 10, an exposure means 20 that forms a toner image, a primary transfer bias roller 45 that transfers the toner image to an intermediate transfer body 40, a secondary transfer unit 50 that performs secondary transfer of the toner image on a transfer material 90 by being brought into contact with the transfer material 90 and a bias roller 42b that charges the remaining toner after the secondary transfer to reverse polarity of a normal charged polarity by being brought into contact with the intermediate transfer body 40, and performs cleaning by transferring the remaining toner charged to the reverse polarity to the latent image forming apparatus 10, inequalities Rs>RV≥R2, Rs>Rv≥Rc, V2≥Vc are established when the volume resistance value of the intermediate transfer body 40 is defined as Rv, a surface resistance value of the intermediate transfer body is defined as Rs, a resistance value of the secondary transfer means is defined as R2, a resistance value of a charging means is defined as Rc, a bias value to be applied to the secondary transfer means is defined as V2 and a bias value to be applied to the cleaning bias roller 42b is defined as Vc. COPYRIGHT: (C)2003,JPO
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