For decades, Solomon worked as a conveyor belt mechanic at the Rapistan Conveyor Company. Like a Troughed Belt Conveyor, a Pipe Conveyor also uses idler rollers. Material transport elevators generally consist of an inclined plane on which a conveyor belt runs. The ammunition handling system has two conveyor belt systems. Escalators and slanted conveyor belts are also forms of inclined plane. Some freezers use transportation belts similar to a conveyor belt. This includes massive bucket wheel loaders and miles of conveyor belts. From there the material goes on a horizontal screw conveyor. A belt conveyor system is one of many types of conveyor systems. The company manufactures rubber products including tyres, treads, tubes and conveyor belts, paints and toys. This conveyor is a cable belt conveyor system with a conveyor feeding a conveyor. There have been several proposals to replace the line with moving walkways or conveyor belts. This prediction of plate tectonics is also referred to as the conveyor belt principle. Conveyor belt sushi restaurants are also popular. In 1901, Sandvik invented and started the production of steel conveyor belts.