Particulate material loader

Abstract From the Canadian patent

A filterless loader which entrains particulate material in air flows is described. The loader includes a reservoir in which the materials may be accumulated and from which the materials may be delivered under gravity through a, lowermost outlet to appropriate processing, equipment. A closed air circuit draws the particulate material into the reservoir from an external storage bin or container. The closed air circuit includes air supply and return conduits communicating with the interior of the reservoir and a fan unit, which circulates air through the conduits. The fan unit draws air from the interior of the reservoir, and forces the air into an inlet end of the supply conduit. A gap is …