Patent ID: 8903283

Claim:
A shutter assembly for opening and closing an outlet of a powder container from which powder is discharged, comprising: an internal shutter including a contact member, movable between a first position at which the internal shutter closes the outlet, a third position at which the internal shutter opens the outlet, and a second position between the first position and the third position, the internal shutter at the second position being movable to the third position while closing the outlet; and an external shutter movable between a closed position at which the external shutter closes the outlet and an open position at which the external shutter opens the outlet, the external shutter including an interlocking member to contact the contact member of the internal shutter to move the internal shutter, wherein as the external shutter is moved from the closed position to the open position, the internal shutter is moved from the first position to the second position in conjunction with movement of the external shutter.