| 摘要 |
An image forming apparatus includes an image bearing member, a toner image forming member, an intermediary transfer member for forming a primary transfer portion, and a primary transfer member supplied with a transfer voltage. The apparatus also has a voltage source for supplying, to the primary transfer member, a transfer voltage and a voltage of a polarity opposite to the transfer voltage, an image bearing member cleaning apparatus for removing toner from the image bearing member, a secondary transferring member, and an intermediary transfer member cleaning apparatus for electrostatically removing toner from the intermediary transfer member. The apparatus further has a voltage source control apparatus for controlling the voltage source so as to apply, to the primary transfer member, a voltage having an absolute value larger than a discharge threshold and having the polarity opposite to the transfer voltage, when a non-recording toner pattern passes through the primary transfer portion.
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