Patent ID: 8881910

Claim:
A system for sorting comprising: an inlet end; a first separation section disposed downstream of the inlet end and comprising a fluidizing section and a hood disposed above the fluidizing section, the hood connected to a air handling system to develop a negative pressure adjacent the fluidizing section to draw a first class of materials into the hood; a second separation section disposed downstream of the first separation section and comprising an air knife and a dropout, a second class of materials passing through the air knife and into the dropout and a third class of materials passing over the dropout and through an outlet end; and a vibration generator coupled to the first separation section and the second separation section to convey material from the inlet end to the outlet end, wherein the air handling system comprises an expansion box to remove the first class of materials from an air stream passing through the expansion box, and a blower disposed downstream of the expansion box to draw air through the hood and the expansion box to generate the negative pressure adjacent the fluidizing section of the first separation section.