Patent ID: 8408830

Claim:
An image forming apparatus which forms images on a plurality of mediums continuously for each of a plurality of jobs according to image data, the image forming apparatus comprising: an image forming section which performs image forming on the mediums and which is capable of correcting a position of the image forming on the mediums in a main scanning direction; a moving roller which is axially movable in the main scanning direction so as to move a medium in the main scanning direction during conveyance to conduct position adjustment thereof in preparation for image formation; a medium end position detecting section for detecting an end position of the medium in the main scanning direction before the moving roller conducts the position adjustment; and a control section which repeats, for each of the plurality of mediums on which images are formed continuously for each of the plurality of jobs, operations including: (i) calculating an amount of misalignment of the medium in the main scanning direction based on the end position detected by the medium end position detecting section, (ii) when one of the plurality of mediums is designated as a first medium and a succeeding medium which is in a same job and which comes later by a predetermined number of pages is designated as a second medium, obtaining a correction amount of an image forming position for the second medium according to the amount of misalignment calculated for the first medium, controlling the moving roller to move the second medium by a distance corresponding to a difference between the correction amount of the image forming position and the amount of misalignment calculated for the second medium, and (iv) correcting the image forming position according to the correction amount.