Patent ID: 6969017
Filing Date: 2005-11-29
Classification: B02C,B29B,Y02W

Abstract:
1. A comminuting apparatus, comprising: a frame having an enclosure with an entrance for receiving waste material; a set of overlapping scissor rolls including a feed scissor roll with a plurality of finger knives and a recirculation scissor roll with a plurality of finger knives, both the feed scissor roll and the recirculation scissor roll carried for co-rotation within the enclosure to provide an entrance nip beneath and between the feed scissor roll and the recirculation scissor roll and operative to comminute the waste material into subdivided pieces by drawing the received waste material beneath the feed scissor roll and up between the feed scissor roll and the recirculation scissor roll; a plurality of feeding fingers carried by the frame, one finger knife configured to intermesh in overlapping relation with an adjacent pair of the finger knives of the feed scissor roll during rotation of the feed scissor roll; a plurality of metering fingers carried by the frame, one metering finger configured to intermesh with an adjacent pair of the finger knives of the recirculation scissor roll during rotation of the recirculation scissor roll; a shear outtake manifold beneath the scissor rolls and configured to collect the subdivided pieces of waste material; a screen interposed between the set of scissor rolls and the shear outtake manifold and operative to permit undersized smaller pieces of a size less than a predetermined size to pass therethrough and to prevent oversized pieces of a size greater than a predetermined size from passing therethrough; and a pneumatic conveyor comprising a source of air flow and a pneumatic duct communicating with an upstream end of the shear outtake manifold and operative to deliver an airstream from the source of air flow into the shear outtake manifold that entrains the subdivided pieces and removes the subdivided pieces from the shear outtake manifold.