Patent ID: 7690637
Filing Date: 2010-04-06
Classification: B42C,B65H,G03G

Abstract:
1. A sheet processing apparatus comprising: a sheet conveying path that brings in sheets discharged from an image forming apparatus and guides the sheets to a standby tray; a processing tray that is provided below the standby tray and is capable of receiving the sheets supplied from the standby tray and placing the sheets thereon; a post-processing unit configured to apply post-processing to the sheets placed on the processing tray; a sheet discharging unit configured to have a conveying tool that discharges the sheets subjected to the post-processing by the post processing mechanism; a paddle that is attached to a rotating shaft arranged in a direction orthogonal to a conveying direction of the sheets and for guiding the sheets supplied from the standby tray to the processing tray, the paddle including a receiving unit that receives an end of a sheet supplied from the standby tray and a sending unit that is arranged at a predetermined angle with respect to the receiving unit and sends the sheets on the processing tray to the post-processing mechanism; a sheet discharge tray that receives the sheets discharged from the discharge port; a tray control unit that controls a height position of the sheet discharge tray such that a sheet on an uppermost surface of the sheets stacked on the sheet discharge tray is in a predetermined height position; a discharge control unit that controls an operation of the sheet discharging unit and stops discharge of new sheets, when a quantity of the sheets stacked on the sheet discharge tray reaches a full state set in advance; and a paddle control unit that rotates the paddle a predetermined angle and temporarily presses the sheet on the conveying tool with the pressing unit, when a sheet is present on the conveying tool in the full state.