Patent ID: 8128013

Claim:
A high efficiency single pass shredder-granulator apparatus comprised of: a first counter-rotating shaft and a second counter-rotating shaft; at least two rotary shear blades fixedly attached to said first counter-rotating shaft; at least one rotary shear blade fixedly attached to said second counter-rotating shaft; a frame adapted to support said first counter-rotating shaft and said second counter-rotating shaft; at least one stationary bed knife fixedly attached to a side of said frame that parallels said first and second counter-rotating shafts and which is comprised of a plate having a flattened side surface, a downward tapered surface, an upward tapered surface, a concave shaped surface, at least one cutting edge, and an aperture for receiving one of said counter-rotating shafts; wherein said cutting edge is positioned to be perpendicular to a shearing edge of said at least one rotary shear blade and is positioned so that a tangent of a cutting edge intersects the center of one of said counter-rotating shafts; and wherein said at least one rotary shear blade and said at least one stationary bed knife are positioned so that they are capable of shearing and shredding material into pieces having edges that are less than one-eighth of an inch.