A conveyor system includes a frame, a plurality of rollers, a driving mechanism, a plurality of endless belts, and a lifting assembly. The plurality of rollers is rotatably attached to the frame. The driving mechanism is configured to rotate the plurality of rollers. The plurality of endless belts surrounds the plurality of rollers. The lifting assembly includes a plurality of surface and an actuator. The actuator is configured to move the plurality of surfaces between a raised position disposed above the plurality of belts and a lowered position disposed below the plurality of belts.