Shredder with multi-point cutters

A rotor assembly for a shredder, comprising:

• a rotor rotatable about an axis and having an outer peripheral surface that extends about the axis;
• a plurality of cutter holders rigidly affixed to the outer peripheral surface of the rotor at locations spaced circumferentially apart and spaced axially along a length of the rotor;
• and
• a plurality of cutters respectively mounted to the cutter holders;
• wherein the cutters each comprise a rigid body having a plan shape as viewed along a first direction, each cutter being mounted on a respective one of the cutter holders with the first direction oriented substantially tangent to the outer peripheral surface of the rotor, the body defining a generally V-shaped corner, wherein the cutters are mounted in an orientation such that the corner of each cutter is oriented to mesh with a respective generally V-shaped groove in a counter-knife of the shredder;
• wherein at least some of the cutters are multi-point cutters in which the corner of the cutter defines a plurality of cutting points spaced apart along the first direction.

A multi-point cutter for a shredder, comprising:

• a rigid body having a central axis extending along a first direction, the body having a plan shape as viewed along the first direction, the body defining a corner at an intersection between two contiguous side faces of the body, the corner defining at least three cutting points spaced apart along the first direction, wherein a topmost cutting point of the cutter is defined by an intersection between the two side faces and a top face of the body all coming together at the topmost cutting point;
• the corner comprising a tapered relief portion that begins immediately at the topmost cutting point and tapers inwardly toward the central axis of the cutter such that the topmost cutting point is farther from the central axis than is any part of the relief portion, and a second cutting point defined below the relief portion, the second cutting point being farther from the central axis than is a lower part of the relief portion adjacent to the second cutting point;
• the corner further comprising a tapered second relief portion that begins immediately at the second cutting point and tapers inwardly toward the central axis of the cutter, such that the second cutting point is farther from the central axis than is any part of the second relief portion, and a third cutting point defined below the second relief portion, the third cutting point being farther from the central axis than is a lower part of the second relief portion adjacent to the third cutting point.