SHEET POST-PROCESSING DEVICE AND CORRESPONDING SHEET POST-PROCESSING METHOD

摘要

In a sheet post-processing device, the front end portion of a sheet (P) transported onto a post-processing tray (316) makes contact with a paper discharge tray (315), and thus it is possible to prevent the sheet (P) from being curled excessively. When the first sheet (P) in a stack of sheets to be subjected to post-processing in a post-processing portion (306) is transported onto the paper discharge tray (315), the standby position of a drive roller (310) forming a paper discharge roller pair (309) is set between the maximum separate position and a nip position on a driven roller (311).