Conveyor is a set of tools used to transport loads and materials quickly and efficiently within an area. This tool was created to facilitate work, especially those related to moving large or heavy material from one location to another. Conveyors generally use belts, wheels, rollers, or chains to transport objects. This tool has been widely used in various places, such as airports, food industry, supermarkets, etc. Modern conveyor systems and parts generally consist of belts and winches. The belt forms a closed loop around the hoist so the hoist will keep turning. The movement system is controlled by pulleys.

http://www.rotaryscreener.com/conveyor/