Patent ID: 7938347

Claim:
A shredder comprising: a pair of cooperating first cutters configured to pierce rows of staggered cross-cuts into a material to be shredded, each of the pair of first cutters comprising: a plurality of first cutting discs equally spaced on a first shaft, wherein each of the first cutting discs includes a main body with a plurality of projecting teeth, and wherein the main bodies of the pair of first cutters are not interleaved with one another; and a pair of cooperating second cutters, disposed down-stream of the pair of first cutters in the material feed direction, that are configured to form a plurality of strip cuts in the pierced material, each of the pair of second cutters comprising: a plurality of second cutting discs equally spaced on a second shaft, wherein the pair of cooperating first cutters and the pair of cooperating second cutters are provided in parallel configuration with respect to each other and wherein the first cutting discs and the second cutting discs are positioned adjacent to each other such that the staggered cross-cuts formed by the first cutters are substantially aligned with the strip cuts formed by the second cutters.