Toner agitator system for a developer unit for an image forming device

A developer unit for use in an image forming device according to one example embodiment includes a housing having an inlet port for receiving toner, a sump for holding received toner and a developer roll rotatably mounted in the housing for transferring toner from the sump. A rotatable agitator is positioned in a lower portion of the sump and a pivotable agitator is positioned in an upper portion of the sump. A biasing member biases the pivotable agitator toward a stop in the pivot path of the pivotable agitator. The pivotable agitator includes an engagement feature positioned in the rotational path of the rotatable agitator when the pivotable agitator is in its home position. As the rotatable agitator rotates, the rotatable agitator engages and disengages the engagement feature causing the pivotable agitator to pivot away from and toward its home position.