Patent ID: 7953356

Claim:
An image forming apparatus comprising: an image forming unit for forming an image; a first roller; a second roller; a belt tensely placed between the first roller and the second roller, said belt having an outer circumferential surface facing the image forming unit and an edge surface substantially perpendicular to the outer circumferential surface, said edge surface having a step portion of equal to or smaller than 0.05 mm and a ten-point mean roughness (Rz) of equal to or smaller than 5.0 μm; and a guiding member disposed at an end portion of at least one of the first roller and the second roller for guiding the edge surface of the belt, said guiding member being formed in a flange shape having a diameter greater than that of the at least one of the first roller and the second roller so that the guide member abuts against the edge surface from outside.