Apparatus for producing small size wood chips

A disc type chipper that includes

• a rotatable disc having a circular outer rim and that includes a series of spaced apart radial disposed slots having an entrance at a front face of said disc and an exit at a rear face of said disc;
• a drive means for rotating said disc at a desired velocity;
• a casing for housing said disc, said casing establishing a flow channel about said rear face of said disc and its circular outer rim;
• a primary knife that is mounted at the front entrance of each of said slots for cutting chips from a work piece when said work piece is brought into contact with said front face of said rotating disc whereby said chips are moved by centrifugal force through each of said slots into said flow channel;
• a counter knife mounted proximate to each said primary knife for slicing said chips as said chips leave said primary knife;
• a series of hammer units that are rigidly mounted upon said rear face of said disc between said slots, said hammer units being positioned to co-act with a series of anvils mounted on an inner wall of said casing for reducing the size of said chips moving in said flow channel;
• and
• a series of paddle blades that are secured to said disc, each paddle blade including a surface that passes over the outer rim of said disc and that substantially extends through said flow channel to engage chips that are being driven through said flow channel to direct said chips into an exhaust duct or directly into a bin.