A method for supplying plastics-related granular material to a plurality of receptacles for subsequent processing, such as by molding or extrusion, including applying vacuum to granules of material in a supply depot to draw a granule stream therefrom, drawing said stream past sequentially positioned...http://www.google.es/patents/US20050039816?utm_source=gb-gplus-sharePatente US20050039816 - Vacuum powered method and apparatus for wirelessly handling and conveying granular material
Vacuum powered method and apparatus for wirelessly handling and conveying ...
