| 摘要 |
An image forming apparatus includes a photosensitive, an intermediary transfer belt, a first charging device and a second charging device. Residual toner remaining on the intermediary transfer belt is to be electrically charged by the first and second charging devices and then is to be collected by being move from the intermediary transfer belt to the photosensitive. The first and second charging devices are successively contacted to the intermediary transfer belt from the first charging device disposed on an upstream side with timing when the first and second charging devices oppose the intermediary transfer belt, thus electrically charging the residual toner. Thereafter, the first and second charging devices are successively spaced from the intermediary transfer belt from the first charging device.
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