Patent ID: 8090283

Claim:
An image forming apparatus comprising: an image bearing body on which surface an image is formed and borne; an image forming section that forms the image on the surface of the image bearing body; a transfer device that transfers the image formed on the surface of the image bearing body to a transferring body; a cleaning member that comes into contact with the surface of the image bearing body to scrape an adhesion substance from the surface after the transfer device transfers the image to the transferring body; a storage tank in which the adhesion substance removed by and moved from the cleaning member is stored; a damming member that obstructs a region between the cleaning member and the storage tank to temporarily dam the adhesion substance moving from the cleaning member to the storage tank on the cleaning member side, the damming member including a plurality of overlapped members having openings, the plurality of members including a movable member that is slidable with respect to other member; and a driving section that drives the movable member to change an overlapping amount between the openings of the plurality of members.