How does a tube lifter work?

Holding and lifting of the loads is realised by a vacuum. The lifting procedure is realised using a spiral tube, the so-called lifter tube; the load-carrying equipment is mounted at the end of this tube. The load-carrying equipment mostly also functions with a vacuum, but can also be mechanical. The suction foot, also called a vacuum cup, is placed on the load to be moved, e.g. a carton, the air in the suction foot and in the lifter tube is evacuated, the lifter tube folds together like an accordion, the load sticks to the suction foot and is lifted. If the vacuum is reduced, the load is lowered again. The vacuum is generated by a side channel blower, a vacuum pump or a multi-chamber ejector (venturi nozzle), depending on the application. Control of the tube lifter is by an operating component at the bottom of the vacuum lifter; this is used for one-hand lifting, lowering, suction and releasing of the load. These properties permit very rapid ergonomic and fluid load handling for the greatest possible efficiency.