Patent ID: 9367017
Filing Date: 2016-06-14
CPC Classification: B65H,G03G

Claim Text:
1. A post-processing device for receiving sheets ejected one by one from an image forming apparatus, and storing, in a storage tray, a number of sheets included in one set on which post processing is to be performed at a post-processing position at once, the post-processing device comprising: a conveyance unit configured to perform conveyance processing of conveying one set of a sheet stack stored in the storage tray to the post-processing position, and ejecting the sheet stack on which the post processing has been performed from the storage tray to an ejection unit; a detection unit configured to detect a paper jam of the sheet stack during the conveyance processing; a retrial judgment unit configured, when the detection unit detects the paper jam, to predict a first time and a second time, and judge that retrial of the conveyance processing is possible when the first time is no earlier than the second time, the first time being a time when a beginning sheet included in a subsequent set that is ejected from the image forming apparatus arrives at the storage tray, the second time being a time when ejection of the sheet stack in which the paper jam is detected is complete in the case where the conveyance processing is retried; and a retrial control unit configured to, when the retrial judgment unit judges that the retrial is possible, control the conveyance unit to retry the conveyance processing.