Principles of Elevator and Conveying Technology With special parts such as 90° turns, cross-over and jumps with catch funnel, balls race through tight curves and chutes and fly through various tracks. Discover exciting conveying technology: With the wheel and stage conveyor models the balls are moved up by a motor-driven conveying wheel. Then even higher by the innovative stage conveyor, which transports the balls one by one all the way to the top in a zig-zag pattern. Once there the balls shoot along their own path downward through the loop, quarter pipe and jumping loop. More ingenious models such as a launching pad, stair step conveyor and chain lift make the subject of conveying technology inspiring.