Patent ID: 7597228

Claim:
A staple cartridge, attachable to and detachable from a four-sided cartridge containing portion of an electric stapler, for a staple pack containing stacked staple sheets adhered with linear staples in parallel with each other, comprising: a staple pack containing chamber; an opening portion formed at a side face of the staple pack containing chamber; an openable and closable door provided at the opening portion that slides linearly from a first end of the opening portion to a second end of the opening portion; wherein the staple pack is chargeable by opening the door to the first end of the opening portion when the staple cartridge is attached to the four-sided cartridge containing portion of the electric stapler, wherein the opening portion of the staple pack containing chamber and an opening portion of the cartridge containing portion of the electric stapler are oriented in a same direction, when the staple cartridge is attached to the four-sided cartridge containing portion of the electric stapler.