Patent ID: 7588242

Claim:
A drive apparatus of a printing device, the drive apparatus comprising: a fuser drive train, the fuser drive train comprising a fuser pinion gear capable of being driven by a fuser motor input, a fuser concentric idler gear capable of revolving on a frame-mounted shaft, the fuser concentric idler gear configured in a mating relationship with the fuser pinion gear, and a fuser engaging idler gear capable of revolving on a first shaft, the fuser engaging idler gear configured in a mating relationship with the fuser concentric idler gear; a duplexer drive train, the duplexer drive train comprising a duplexer pinion gear capable of being driven by a duplexer motor input, a duplexer concentric idler gear capable of revolving on the frame-mounted shaft, the duplexer concentric idler gear configured in a mating relationship with the duplexer pinion gear, and a duplexer engaging idler gear capable of revolving on a second shaft, the duplexer engaging idler gear configured in a mating relationship with the duplexer concentric idler gear; an exit roll gear, the exit roll gear capable of being driven in a first direction and a second direction; and a bell crank swingably mounted on the frame-mounted shaft, the bell crank at least partially disposed in-between the fuser concentric idler gear and the duplexer concentric idler gear, the bell crank comprising a first lateral surface and a second lateral surface, wherein the first shaft is mounted on the first lateral surface and the second shaft mounted on the second lateral surface, and, wherein the bell crank is capable of swinging to assume one of a first position and a second position, and, wherein the bell crank in the first position is capable of coupling the fuser engaging idler gear to the exit roll gear for driving the exit roll gear in the first direction, and, wherein the bell crank in the second position is capable of decoupling the fuser engaging idler gear from the exit roll gear and coupling the duplexer engaging idler gear to the exit roll gear for driving the exit roll gear in the second direction.