Patent ID: 8837963
Filing Date: 2014-09-16
Classification: G03G

Abstract:
1. An image forming apparatus that forms an image based on input image data, comprising: a plurality of image forming units; a transfer belt onto which a plurality of images formed by said plurality of image forming units are transferred; a detection unit configured to detect a position of said transfer belt in a belt width direction; a steering roller configured to support said transfer belt; a position adjusting unit configured to adjust a tilt of said steering roller according to the detected position of said transfer belt so as to adjust the position of said transfer belt in the belt width direction according to a detected position detected by said detection unit; a calibration unit configured to calibrate an adjustment amount for adjusting color registration based on a detected position of patterns formed onto said transfer belt by said image forming units; a registration adjusting unit configured to adjust image forming positions of said image forming units based on the calibrated adjustment amount; and a control unit configured to control said steering roller so that, in a case where said calibration unit calibrates the adjustment amount, the tilt of said steering roller is fixed after the position of said transfer belt in the belt width direction is adjusted to a first position, and in a case where said image forming units form an image based on the input image data, the tilt of said steering roller is adjusted according to the detected position of said transfer belt such that the position of said transfer belt in the belt width direction is in a second position.