Toner cartridge having a shutter lock mechanism

A toner cartridge for use in an image forming device having an imaging unit separate from the toner cartridge removably installed therein, the toner cartridge comprising:

• a housing having a reservoir for containing toner therein, the housing having an exit port in fluid communication with the reservoir;
• a shutter positioned at the exit port that is movable between an open position to permit toner from the reservoir to pass out of the exit port and a closed position to prevent toner from passing out of the exit port, the shutter being biased toward the closed position;
• a linkage operatively connected to the shutter to open the shutter upon being actuated by an engagement feature on the image forming device;
• and
• an interlock operatively engaged with the linkage and biased toward a locked position preventing the linkage from opening the shutter, the interlock being movable to an unlocked position when the interlock is actuated by an engagement feature on the imaging unit permitting the linkage to open the shutter.