Patent ID: 8873996

Claim:
A toner system for an image forming device, comprising: a developer unit having: a housing having a reservoir for holding toner; an inlet port on the housing of the developer unit for receiving toner; and a shutter movable between a closed position blocking the inlet port and an open position unblocking the inlet port, the shutter being biased toward the closed position; and a toner cartridge having: a housing having a front, a rear, a top and a bottom, the housing of the toner cartridge having a reservoir for holding toner; an outlet port on the front of the housing of the toner cartridge for transferring toner from the reservoir of the toner cartridge to the developer unit through the inlet port; and an engagement member having a first engagement surface and a second engagement surface, the first engagement surface positioned to receive an actuation force from an actuation feature of the image forming device when the toner cartridge is installed in the image forming device, the second engagement surface positioned proximate to the outlet port and positioned to engage the shutter of the developer unit when the toner cartridge is installed in the image forming device and mated with the developer unit, the engagement member being movable from a first position to a second position upon receiving the actuation force, wherein as the engagement member moves from the first position to the second position when the toner cartridge is mated with the developer unit, the second engagement surface protrudes from the front of the housing of the toner cartridge and moves the shutter of the developer unit from the closed position to the open position.