The feeder is suitable for sending coal from coal bunker onto belt conveyor or screening machine.This type of feeder adopts split structure design,easy to install on site,its main special features include stable power transmission equilibrium, reliable operation,easy travel readjustment,continuously adjustable feed gate,and ability to timely clean up spill-out coal. The feeder was granted the national patent.Now 4 sizes ranging from GMW-2 to GMW-5 are available.