Patent ID: 7798481
Filing Date: 2010-09-21
Classification: B65H

Abstract:
1. A sheet post-processing apparatus that performs, according to need, post-processing for a sheet supplied from an image forming apparatus and discharges the sheet, comprising: a post-processing section that performs post-processing for a sheet supplied from the image forming apparatus; a sheet discharge section that has feeding means for leading the sheet to which post-processing has been applied by the post-processing section to a sheet discharge port; a movable sheet discharge tray stores the sheet discharged from the sheet discharge port, a sensor to detect an uppermost surface of the sheet stored in the sheet discharge tray that is attached near the sheet discharge port; a sheet discharge drive section moves the sheet discharge tray so that the sheet discharge tray receives the sheet discharged from the sheet discharge port at a first standby position lower than the sensor position or at a second standby position higher than the first standby position and lower than the sensor position; and a controller that identifies the type of the sheet supplied from the image forming apparatus to control the height position of the sheet discharge tray, the controller changes the height position of the sheet discharge tray to allow the sheet discharge tray to receive the sheet discharged from the sheet discharge port at the first standby position in the case where the sheet is a first type, while to receive the sheet discharged from the sheet discharge port at the second standby position in the case where the sheet is a second type.