Patent ID: 8116659

Claim:
An image-forming device comprising: a casing; a developing unit that is configured to be detachably mounted in the casing and formed with a first opening, the developer unit having a developer carrying member carrying a developer; a first shutter configured to open and close the first opening; a developer cartridge that is configured to be detachably mounted in the casing, accommodates the developer, and is formed with a second opening, the second opening being in alignment with the first opening when the developing unit and the developer cartridge are mounted in the casing; a second shutter configured to open and close the second opening; an alignment member that is configured to be disposed between the developing unit and the developer cartridge when the developing unit and the developer cartridge are mounted in the casing, the alignment member being formed with a third opening, the third opening being in alignment with the first opening and the second opening when the developing unit and the developer cartridge are mounted in the casing; and a third shutter that is disposed in the alignment member and configured to open and close the third opening, and wherein the opening and closing operations of the first shutter are performed in association with the opening and closing operation of the third shutter.