| 摘要 |
An image forming apparatus includes a rotatable image bearing member; a developing device, including a developer carrying member and developing bias application means for applying a developing bias for developing a developer image; a rotatable intermediary transfer member; a primary transfer member for forming a primary transfer nip and for transferring the developer image from the image bearing member onto the intermediary transfer member; a secondary transfer member for secondary-transferring the developer image from the intermediary transfer member onto a recording material; wherein an area of the image bearing member includes a first area at least containing an area located in primary transfer nip at a time when a speed of the intermediary transfer member is temporarily decreased and includes a second area located in the primary transfer nip when there is no temporary change in speed; and a control device for controlling a developing bias.
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