Abstract: A cam drive system having parallel input and output shafts and means for rotating the input shaft includes a plurality of cams coupled at intervals around the periphery of the input shaft. Each cam utilizes a camming surface which incorporates a radially outwardly sweeping step section and a constant radius dwell section positioned adjacent to each step section. A plurality of cam followers are coupled at intervals around the periphery of the output shaft. Each cam follower is aligned to engage a single one of the cams. The present invention converts the continuous rotation of the input shaft into intermittant displacements of the output shaft.

Abstract: A high speed printer elevator control mechanism includes an elevator frame having a paper guide chute for guiding paper into a bin and rides up and down in the bin responsive to an electric motor drive. The elevator moves a pre-determined distance above the paper being stacked in the bin responsive to control signals initiated by counting the paper being stacked in the bin. A pair of paper control strips or flappers are mounted to the elevator frame for guiding the paper in the bin and a switch is mounted to the elevator frame adjacent one of the flappers so that the switch is actuated by the movement of the paper control strip to generate a signal by each movement thereof. The signals are counted by the microprocessor which initiates the command to move the elevator.