Image forming system, post-processing apparatus and binding device

A post-processing apparatus comprising:

• a binding device configured to bind a sheet output from an image forming apparatus configured to form an image on the sheet;
• and
• a control unit configured to control the binding device,
• wherein the binding device is capable of executing binding processing via a staple forming process of forming a staple and moving the staple toward a striking-out position and a staple striking-out process of striking out the staple at the striking-out position, and
• wherein the control unit is configured to control the binding device to repeat multiple times the staple forming process without undergoing the staple striking-out process.

A binding device comprising:

• a staple forming unit configured to form a staple and to move the staple toward a striking-out position;
• a staple striking-out unit configured to strike out the staple at the striking-out position;
• and
• a cam configured to actuate the staple forming unit and the staple striking-out unit,
• wherein the cam has a first cam surface for actuating the staple forming unit and the staple striking-out unit, and a second cam surface for actuating the staple forming unit by bypassing all or part of actuation of the staple striking-out unit by the first cam surface.