| 摘要 |
PROBLEM TO BE SOLVED: To reduce load imposed on an intermediate transfer belt, to clean the intermediate transfer belt without being influenced by radiant heat from a fixing device and further to use all the toner to form an image without causing waste toner. SOLUTION: This image forming device of a cleanerless type and an intermediate transfer body type is provided with an electrifying means 50 for electrifying residual toner left on the intermediate transfer belt 21 after transfer to have a reverse polarity to that of the toner at the time of primary transfer on the more upstream side of an image forming unit UBk on the most upstream side out of a plurality of image forming units and on the downstream side of a secondary transfer part N2 in the moving direction (direction shown by an arrow R21) of the belt 21. The image forming unit on the most upstream side is the image forming unit UBk for forming a black toner image. Thus, the load imposed on the belt 21 is reduced, the belt 21 is cleaned without being influenced by the radiant heat from the fixing device, and not only the toner left after primary transfer but also the toner left after secondary transfer are reused.
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