| 摘要 |
An image forming apparatus includes an image bearing member; a movable belt, wherein an image on the image bearing member is transferred toward the belt; a supporting member for supporting the belt, wherein the belt has a first engaging portion, and the supporting member has a second engaging portion, and the belt is regulated in a lateral shifting by engagement between the first engaging portion and the second engaging portion; and a regulating member, disposed out of contact with the belt, for regulating movement of the first engaging portion, wherein when the belt moves, the regulating member is effective to prevent the first engaging portion from disengaging from the second engaging portion.
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