| 摘要 |
PROBLEM TO BE SOLVED: To provide an image forming apparatus capable of recovering the transfer material cleaning performance of a transfer material cleaning device by efficiently removing an electric discharge product from both of an image carrier and a transfer material. SOLUTION: In the image forming apparatus, when backside contamination of a recording material occurs, a control portion 110 carries out control so that a plurality of aging toner bands having a length L1 longer than a circumference L3 of a secondary transfer roller 56 is formed at an interval L2 at positions in which the restoring toner bands can overlap with control images with respect to a longitudinal direction of the secondary transfer roller 56 and then is transferred to the secondary transfer roller 56 through an intermediate transfer belt 51. The aging toner bands GE transferred onto the secondary transfer roller 56 stagnate on a fur brush 71 rubbing against the secondary transfer roller 56 to remove the electric discharge product deposited on the secondary transfer roller 56. The toner stagnating on the fur brush 71 is inverted in charge polarity and then is re-transferred onto the intermediate transfer belt 51 through the secondary transfer roller 56. The toner stagnates on a belt cleaning device 8B to remove the electric discharge product also from the intermediate transfer belt 51. COPYRIGHT: (C)2009,JPO&INPIT
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