Patent ID: 7354012

Claim:
A round undulating blade module for a shredder, the blade module comprising; a first round undulating blade, including: a periphery; an undulating blade flank including at least two cambers having a first curvature and at least two cambers having a second curvature alternatively arranged with respect to the cambers having the first curvature; and hooked edges formed on the periphery of the cambers having the first curvature; a second round undulating blade, including: a periphery; an undulating blade flank including at least two cambers having a third curvature and at least two cambers having a fourth curvature alternatively arranged with respect to the cambers having the third curvature; and hooked edges formed on the periphery of the cambers having the third curvature; wherein the first and second undulating blades are arranged in such a manner that the cambers having the first and third curvature of each of the undulating blades face each other, and the cambers having the second and fourth curvature of each of the undulating blades face each other; and wherein the first curvature is different from the third curvature and the second curvature is different from the fourth curvature.