Patent ID: 8693010

Claim:
An image forming apparatus comprising: a first image forming unit; a second image forming unit disposed downstream of the first image forming unit in a sheet conveyance direction; an intermediate conveyance unit configured to convey a sheet on which an image is formed by the first image forming unit to the second image forming unit; an intermediate discharge unit which is branched from the intermediate conveyance unit and configured to discharge the sheet on which an image is formed by the first image forming unit; and an image formation control unit configured to control image formation processing by the first image forming unit and the second image forming unit, wherein, if one-sided image formation in combined processing to perform two types of processing including one-sided image formation and two-sided image formation is performed, the image formation control unit forms an image on one side of the sheet by the second image forming unit, wherein, if the two-sided image formation in the combined processing is performed, the image formation control unit forms an image on a first side of the sheet by the first image forming unit, and then forms an image on a second side of the sheet by the second image forming unit, and wherein, if there is an execution request for a job of one-sided image formation processing different from a combined job of the combined processing during execution of the combined job, the image formation control unit, while performing the one-sided image formation in the combined job of the combined processing by the second image forming unit, performs the one-sided image formation related to the execution request for the job of the one-sided image formation processing different from the combined job by the first image forming unit and then discharges from the intermediate discharge unit a sheet which has undergone the one-sided image formation processing in the job different from the combined job.