Patent ID: 8439288

Claim:
A feed device for a high-pressure roller press for the high-pressure comminution of grinding stock, said feed device delivering the grinding stock in a controlled manner into a roller nip forming a centerline between two rollers of the high-pressure roller press, each roller rotating about an axis of rotation, the feed device comprising: at least two rotary valves, the positions of which can be varied independently of one another, the rotary valves being disposed on a vertical feed shaft for the grinding stock having a rectangular cross section, the shaft having two side walls parallel to each other and parallel to, but spaced inwardly, toward the centerline, relative to the axes of rotation of the rollers, the shaft further having two end walls connecting the two side walls and being arranged perpendicular to the axes of rotation of the rollers, the rotary valves being pivotally attached to the end walls at positions that are spaced inwardly of an edge of said end walls and spaced above a bottom of said end walls.