(under subclass 437.2) Device wherein the movement is effected by action of the peripheral surface of a rotary, cylindrical member which may include teeth that interfit with cooperating teeth on the conveyor or may include a smooth surface that frictionally engages the conveyor to effect movement thereof.
(1) Note. a gear that drives chain, or a pulley that drives a belt, which in turn, drives a pusher is included herein.