what is meant by conveyor? or Conveyor system?

          A Conveyor system is a standard piece of mechanical material handling equipment or assemblie, that moves materials or packages from one location to a different location with minimal effort over a fixed path. 

Image source: Wikipedia

          They typically contains frames that support rollers, wheels or belts and that they could also be motor powered or manual devices. Conveyors are particularly helpful in applications involving the transportation of heavy or bulky materials like gravel or aggregate. They are extremely popular in the material handling and packaging industries due to efficient and fast transportation of materials. 

         They also include moving belts that used in belt conveyors, bucket and vertical conveyors that raise material, vibrating conveyors that use vibrating motion to maneuver material, and overhead conveyors from which things suspend throughout transport. Different sorts include screw conveyors for moving liquid or material consisting of small grains, chute conveyors are located on sleek surfaces and gravity, and drag or tow conveyors that use cables to pull objects on. Walking beam conveyors move objects by forward sweep mechanism to planned positions for manufacturing operations.
          The verity of conveyors is infinite, but the two major classifications used in typical plants are Pneumatic and Mechanical.

Note: The power requirement of a Pneumatic conveyor system are much greater than for a mechanical conveyor of equal capacity. 

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