Electric stapler and method adapted for electric stapler to adjust staple leg length

A method of adjusting a length of each leg of staple in an electric stapler, the stapler containing

• a cartridge including staple sheets stacked with multiple layers, each staple sheet being composed of a plurality of straight staples connected to each other, the cartridge being attachable or detachable by itself,
• a head portion including a forming plate that forms each of the straight staples so as to be U-shaped, an anvil, and a driver plate that ejects the formed staple, and
• a stapler main body supplying the staple sheet below the forming plate and containing a driving portion that drives the forming plate and the driver plate in the head portion, the method comprising the steps of:
• preparing plural head portions having inside the forming plates, the anvils and the driver plates, which have different width lengths from each other, as the head portion when adjusting the length of each leg of the staple formed according to a thickness of the bundle of the sheets of paper to be bound, the head portions being attachable or detachable to or from the stapler main body;
• selecting any one from the head portions according to a thickness of the bundle of the sheets of paper to be bound so as to be mounted onto the stapler main body;
• attaching the cartridge to the stapler main body so as to face the driving portion of the stapler main body through the selected head portion;
• detaching the cartridge facing the driving portion through the selected head portion from the stapler main body toward a direction where the cartridge is moved apart from the selected head portion and the driving portion;
• and
• detaching the selected head portion from the stapler main body after the cartridge is detached and attaching a head portion other than the selected head portion to the stapler main body.