Abstract:
A cutter for a wood-chipping apparatus has a drum provided around its periphery with a plurality of blades. Straight-edged blades defining with the cutting edges on rotation of the arbor an inner orbit alternate with comb blades each having a plurality of in-line outer blade regions defining an orbit outside the inner orbit. Inclined intermediate flanks extend from the regions of the outer regions of the cutting edge of the comb blades at an angle of 45* to the outer orbit and cross the inner orbit. The arbor is formed ahead of the comb blades with a diameter that is greater than its diameter elsewhere by a distance equal to the radial spacing between the inner and outer orbits.
Abstract:
Pieces of wood are fed to the orbit of a cutter blade by a feed shaft having one side forming a relatively flat angle (obtuse angle) with the orbit (and inclined counter to the direction of rotation) and another side opening substantially radially (i.e., at a right angle) into the orbit. Drive chains are provided on these sides to advance the pieces of wood on the one side at a higher rate than the pieces on the other side so as to produce chips of like thickness. The column is curved back over the cutter and the chains are driven from a common center which is also the center of curvature for both sides.