Patent ID: 6193177
Filing Date: 2001-02-27
Classification: B02C

Abstract:
A grinder apparatus comprising:a drum means having a horizontal axis, said drum means having a circular grinding track therein, said drum means for being driven in rotation at a speed such that material therein is held against said circular grinding track by centrifugal force;a knife means positioned at an upper descending portion within said drum means, said knife means for detaching the material from said circular grinding track;a deflecting plate means disposed beneath said knife means for receiving the detached material from the circular grinding track means and for directing the detached material toward an output of said drum means, said knife means having an active face forming an angle of between +15.degree. and -50.degree. relative to a radial plane extending between said horizontal axis of said drum means and an edge of said active face; andblowing nozzles oriented towards said circular grinding track adjacent said knife means, said blowing nozzles being supplied with pressurized gas.