Patent ID: 8718521
Filing Date: 2014-05-06
Classification: G03G

Abstract:
1. An image-forming apparatus, comprising: a transfer roller having a recessed portion in a circumferential surface; a driving portion configured to rotatably drive the transfer roller; an image carrier belt configured to carry an image; a tension roller around which the image carrier belt is wound, the tension roller configured to make contact with the transfer roller interposed by the image carrier belt; a biasing portion configured to bias the tension roller towards the transfer roller; and a position-regulating portion configured to, when the transfer roller rotates and the transfer roller and the image carrier belt make contact, cause a position to be maintained at which the image carrier belt wound around the tension roller intersects a virtual circumferential surface that is an extension of the circumferential surface of the transfer roller into the recessed portion, the position-regulating portion being configured to regulate an inter-axle distance between an axle of the transfer roller and an axle of the tension roller such that the inter-axle distance as the recessed portion formed in the circumferential surface of the transfer roller opposes the tension roller is smaller than the inter-axle distance as the tension roller makes contact with the transfer roller with the image carrier belt interposing between the tension roller and the transfer roller.