Sheet processing system and control method

A sheet processing method, comprising the steps of:

• conveying a sheet on a conveying path towards a tray configured to support a sheet on opposite sides of the sheet orthogonal to a conveyance direction of the sheet, the tray including a first adjustable support and second adjustable support positioned opposite the first adjustable support in the direction orthogonal to the conveyance direction of the sheet, the first and second adjustable supports being independently movable;
• detecting a skew angle of the sheet conveyed towards the tray;
• detecting positions of each corner on a front end in the downstream direction of the sheet conveyed towards the tray;
• and
• controlling movement of the first and second adjustable supports in the direction orthogonal to the conveyance direction based on the detected skew angle and the detected positions of each corner on the front end of the sheet so that the sheet is conveyed to the tray without jamming.

A sheet processing system for controlling a standby tray in a post processing apparatus, the system comprising:

• a skew sensor configured to detect a skew angle of a sheet conveyed to a standby tray including a first adjustable support and second adjustable support positioned opposite the first adjustable support in the direction orthogonal to the conveyance direction of the sheet;
• a corner sensor configured to detect positions of each corner on a front end in the downstream direction of the sheet conveyed to the standby tray;
• and
• a controller configured to control movement of the first and second adjustable supports based on the detected skew angle and the detected positions of each corner on the front end of the sheet conveyed to the standby tray so that the sheet is conveyed to the standby tray without jamming.