Patent ID: 8800899

Claim:
A grinding machine for use in grinding materials, the grinding machine comprising: a grinder assembly for receiving material; the grinder assembly having at least a front side; a plurality of removable hoppers removably positionable on the grinding assembly for dispensing material to the grinder assembly; each of the removable hoppers being detachable from the grinder assembly by movement in a substantially non-vertical direction from the front side of the grinder assembly; a passage defined in each of the hoppers being cooperatively positionable in communication with the grinding assembly defining a downward flow path from each of the hoppers into the grinder assembly for allowing movement of material from each of the hoppers to the grinder assembly; and a device carried on each of the hoppers being positionable in an open position when the hopper is on the grinder assembly and being positionable in a closed position when the hopper is removed from the grinder assembly.