Patent ID: 7128285

Claim:
In a disintegrator having a case ( 4 ) provided with an upper hopper 2 and an under exit ( 3 ), a pair of upper rolls ( 5 , 6 ), an under roll ( 7 ) having a plurality of box seats formed thereon for holding disintegrated material, the under roll located below the upper rolls, and knives ( 8 , 9 ) projecting from inner surface of the case ( 4 ) towards the under roll ( 7 ), the improvement comprising: a number of rotative disk-shaped cutters ( 27 ) located below the knives ( 8 , 9 ), wherein the under roll ( 7 ) includes a number of annular grooves ( 25 ) formed thereon, each annular groove ( 25 ) dividing at least one of the box seats and engaging at least one of the rotative disk-shaped cutters ( 27 ), whereby, in operation, disintegrated material retained in each of the divided box seats is further disintegrated by a corresponding rotative disk-shaped cutter.