Patent ID: 8165496

Claim:
A powder material cartridge, comprising: a powder material chamber that holds a powder material therein; a receiving section provided in said powder material chamber including a first opening formed therein through which said powder material is received into said powder material chamber; a first shutter rotatably received in said receiving section and including a second opening and a third opening formed therein, wherein said first shutter is rotatable either to a first opening position where the second opening is in alignment with the first opening, or to a first closing position where the second opening is not in alignment with the first opening; and a second shutter received in said first shutter and configured to slide straight in said first shutter, said second shutter having a wall, wherein when said second shutter slides to a second closing position, said second shutter closes the second opening and the third opening, and when said second shutter slides to a second opening position, said second shutter opens the second opening.