Patent ID: 7010243

Claim:
An image forming device capable of replacing any of a plurality of cartridges comprising: a driving unit for moving the position of the toner cartridge; a detecting unit for detecting necessity of replacing a toner cartridge; a control unit for controlling said driving unit in order to move a toner cartridge that needs to be replaced to a specified replacement position preset for toner cartridge replacement, when the necessity of replacing a toner cartridge is detected by said detecting unit; and a receiving unit for receiving a printing instruction, wherein said control unit further controls said driving unit in order to move each toner cartridge to a printable position, and to move the toner cartridge that needs to be replaced back to said replacement position after a specified printing is completed, when a printing instruction is received by said receiving unit while the toner cartridge that needs to be replaced has been moved to said replacement position and is ready to be replaced.