Patent ID: 8113454

Claim:
A paper shredding roller assembly comprises of: a left roller ( 1 ); a right roller ( 2 ) juxtaposed to said left roller ( 1 ); a plurality of left circular knives ( 3 ) are attached axially to said left roller ( 1 ) in a spiral fashion, and spaced with each other by a predetermined distance (H); and a plurality of right circular knives ( 4 ) are attached axially to said right roller ( 2 ) in a spiral fashion, and spaced with each other by a predetermined distance (H); a plurality of left cutting tips ( 31 ) are disposed around a circumference of the left circular knife ( 3 ); a plurality of right cutting tips ( 41 ) are disposed around a circumference of the right circular knife ( 4 ); and characterized in that: each left circular knife ( 3 ) comprises of a plurality of sloping cutting edges ( 5 ) disposed around the circumference of said left circular knife ( 3 ), corresponding with the right cutting tips ( 41 ); and each right circular knife ( 4 ) comprises of a plurality of sloping cutting edges ( 5 ) disposed around the circumference of the right circular knife ( 4 ), corresponding with the left cutting tips ( 31 ).