| 摘要 |
An image forming apparatus include an image bearing member for carrying toner; a rotatable endless belt member for transferring the toner from the image bearing member onto a transfer material; a plurality of transfer means for constituting a plurality of transfer areas and for supplying to the belt member electric charge for transferring the toner from the image bearing member onto a transfer material; first stretching means, contacted to the belt member at a first contact area, for stretching the belt member; second stretching means, contacted to the belt member at a second contact area, for stretching the belt member, wherein the plurality of transfer areas is disposed between the first contact area and the second contact area which are adjacent to each other, and the plurality of transfer areas include a first transfer area which is closest to the first contact area; and abutting means for abutting to the belt member at a position between the first transfer area and the first contact area; wherein the abutting means is bulged in a direction from an inside of the belt member toward outside thereof at least partly only inside a widthwise range of the first contact area with respect to a peripheral moving direction of the belt member.
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