Sheet binding system for an image forming apparatus

摘要

An image formation apparatus obtains optimum double-face print output results aligned in a binding direction even if plural recording sheet sizes mixedly exist in one document. To do so, a CPU of a formatter unit judges consistency between image formation directions on different-size recording sheets on the basis of a designation state of a short edge binding double-face mode or a long edge binding double-face mode designated to a print job by a PC/WS and a designation state of the recording sheet size independently designated to each page of the print job, and it is then controlled based on the judged result that double-face image formation to the recording sheet of either of the designated sizes is performed based on the other double-face mode than the double-face mode actually designated to the print job.