Patent ID: 7422172
Filing Date: 2008-09-09
Classification: B02C

Abstract:
1. A paper shredder cutting tool having multiple cutting edges, comprising a first cylindrical rotary cutter and a second cylindrical rotary cutter, which are configured to rotate in opposite directions to each other, and each of the rotary cutters is mounted on a polygonal shaft having a first end and a second end, and a plurality of cutting blades are securely mounted on the shafts; a paper guide is configured between each pair of adjacent cutting blades, thus partitioning the cutting blades therebetween, and thereby allowing the cutting blades to be assembled and mounted in an interleaving fashion on the two cylindrical rotary cutters, wherein each of the cutting blades is further constructed from a pair of blades; a plurality of cutting edges are circumferentially arranged and defined on a periphery of each of the pair of blades of the cutting blades; said cutting tool further comprising said first rotary cutter having said polygonal shaft with all of said plurality cutting blades being clockwise on a first end thereof and all of said plurality cutting blades being counterclockwise on a second end thereof, and said second rotary cutter having said plurality of cutting blades in an opposite orientation to corresponding cutting blades of said first rotary cutter; wherein the cutting blades of said cutting tool have a radiate pattern with the cutting edges of each of the first and second rotary cutters forming a single chevron pattern centered at a middle of the cutters with the apexes of the respective chevrons leading toward each other into the intersection formed between the first and second rotary cutters.