Comminuting apparatus

A device for comminuting media materials comprising:

• a base member further defined by a chamber having a front wall, a rear wall, opposing side walls, a top wall assembly and a screen forming a bottom wall, said screen having a plurality of apertures constructed and arranged to allow passage of comminuted material;
• a knife mill assembly secured to said base member and mounted for rotation about a fixed axis within said chamber, said knife mill assembly including a 4000 gram rotatable mill core with a central bore mounted to a shaft member having a proximate and distal end, said shaft member have a fixed axis extending through said opposing walls of said chamber with a 3600 gram fly wheel attached to said distal end and a motor attached to said proximal end, said rotating mill core further including at least one straight edge horizontal mill cutter bed having a leading edge with a 2 degree offset from a trailing edge and at least one cutting blade insert extending horizontally along substantially the entire length of said mill core, said at least one cutting blade insert fixedly attached to said mill core extending axially outward with a end of said cutting blade shaped with a 15 degree chamfer;
• at least two bed knives shaped with a 60 degree chamfer are positioned in a stacked arrangement wherein one bed knife is located above the other bed knife and fixedly attached to one of said wall assemblies;
• said bed knives positioned so that blade edges extend inward towards said rotatable mill core;
• said mill core rotating in proximity to said bed knives in order to create shearing surfaces;
• a feeding mechanism for advancement of material to be comminuted into said knife mill assembly, said roller assembly having a substantially cylindrical member having a knurled surface rotationally mounted above said bed knife and rotated by a second motor for advancing material towards said rotatable mill core, said roller positioned in proximity to top surface of said bed knife so that feeder material contacts said roller surface and said top surface of said bed knife;
• an RPM sensor to measure RPM's of said mill core;
• a control circuit coupled to said RPM sensor, said control circuit regulating rotation speed of the mill core by control of said first motor and rotational speed of said feeding mechanism by control of said second motor, said control circuit maintaining the rotation speed of the mill core at about 750 rpm;
• wherein said mill core rotates in proximity to said screen whereby said rotatable mill core grates material through said screen for disposal at a speed of about 1000 rpm that will allow destruction of material resulting in comminuted media material having normal edge dimensions of 1.5 mm or less.