Patent ID: 7461802

Claim:
A grinding machine, comprising: a) a mill box having opposite sides, the opposite sides of the mill box defining a grinding width, each of the sides defining an aperture; b) a grinding drum positioned within the mill box, the grinding drum having an axis of rotation; c) an anvil having a cross-section, the cross-section including a wedge-shaped portion and a rectangular portion, the wedge-shaped portion having a tapering surface extending from a first reference point to a second reference point, each of the first and second reference points being located a distance from the axis of rotation of the grinding drum, the second reference point of the tapering surface being located farther from the axis of rotation than the first reference point, the anvil being positioned within the apertures of each of the sides of the mill box, the anvil having a length greater than the grinding width of the mill box such that ends of the anvil extend beyond the sides of the mill box; d) wherein the tapering surface of the anvil is oriented such that the first and second reference points are horizontally aligned with one another.