Apparatus for dispensing particulate material

An apparatus for dispensing a composition of coarse and fine particles comprising:

• a bin section for holding a supply of the blended composition, and having an inlet for receiving the composition from the bin section;
• and a cone section located below the bin section, and including
• (i) an outer cone connected to and extending downward from the bin section, and having a first frusto-conical, annularly closed and downwardly inwardly sloping interior surface, and
• (ii) an inner cone supported within the outer cone, and having a second frusto-conical, annularly closed and downwardly sloping interior surface to conduct downward a first portion of the composition discharged from the bin section,
• the inner and outer cones forming an outer annulus therebetween to conduct downward a second portion of the composition discharged from the bin section,
• the outer cone including a bottom edge forming an outlet opening to discharge the composition from the cone section, the inner cone including a bottom edge forming an outlet opening to discharge said first portion of the composition from the inner cones, and
• the outlet opening of the inner cone having a diameter between 11 and 13 inches and being three to five inches above the outlet opening of the outer cone, and the interior surface of the inner cone forming an angle between 16.degree. and 20.degree. with the vertical.