Patent ID: 7134656

Claim:
A sheet post-process apparatus, comprising: a standby tray that makes sheets ejected from an image forming apparatus stand by, the standby tray having a tilt angle of θ 1 at which front ends of the sheets are positioned higher than rear ends of the sheets; a processing tray arranged under the standby tray for loading the sheets dropped and fed from the standby tray and/or the sheets ejected from the image forming apparatus not via the standby tray; a processing mechanism for post-processing the sheets loaded on the processing tray; and a paper ejection tray that loads the sheets ejected from the processing tray after being post processed, the paper ejection tray having a tilt angle of θ 2 at which the front ends of the sheets are positioned higher than the rear ends of the sheets, wherein the processing tray has a tilt angle of θ 3 at which the front ends of the sheets are positioned higher than the rear ends of the sheets and the tilt angle θ 1 of the standby tray, the tilt angle θ 3 of the processing tray, and the tilt angle θ 2 of the paper ejection tray have a relation of θ 1 >θ 3 >θ 2 .