Patent ID: 9720352
Date: 2017-08-01
CPC Classifications: G03G

Claim:
1. An image forming apparatus comprising: a belt unit including an endless belt capable of traveling around a plurality of stretching rollers supporting said endless belt; an image forming unit configured to form a toner image on said belt; a sensor unit including a sensor including a light emitting portion and a light receiving portion and configured to detect light from said belt; a setting portion configured to set an image forming condition of said image forming unit in accordance with an output of said sensor; and a positioning member including a first portion-to-be-contacted contacting at least one end portion of said belt unit with respect to a widthwise direction crossing with a moving direction of said belt at a plurality of positioning places and a second portion-to-be-contacted contacting at least one end portion of said sensor unit with respect to the widthwise direction at a plurality of positioning places.