A carriage is mounted for movement along a track situated above, and generally parallel to, the case conveyor. When the case reaches a predetermined location, conveyor movement is terminated and the carriage is moved along the track by a pneumatic cylinder. Affixed to the side of the track is a rack having a plurality of gear teeth. The teeth of a pinion gear, situated on one end of a shaft extending from the carriage, operably engage the gear teeth of the rack. In this manner, the gear is rotat...