Patent ID: 6024308
Filing Date: 2000-02-15
Classification: B02C,D21D

Abstract:
A refiner disc assembly for a flat disc refiner comprising:a carrier element having an outer radial periphery, at least one mounting surface, and an axis of rotation;a first refiner disc carried by a first mounting surface of the at least one mounting surface that is disposed parallel to a plane that is generally perpendicular to the axis of rotation of the carrier element, the first refiner disc 1) being disposed radially inwardly of and adjacent to the outer radial periphery of the carrier element, 2) being disposed generally concentrically relative to the axis of rotation of the carrier element, and 3) having a first refiner surface facing generally outward and away from the first mounting surface;a plurality of refiner bars protruding generally axially from and extending generally radially along the first refiner surface;wherein the first refiner surface defines a first refining plane disposed at an angle that is acute relative to the plane that is generally perpendicular to the axis of rotation of the carrier element;a second refiner disc carried by a second mounting surface of the at least one mounting surface that is disposed parallel to the plane that is generally perpendicular to the axis of rotation of the carrier element, the second refiner disc 1) being disposed radially inwardly of the first refiner disc, 2) being disposed generally concentrically relative to the axis of rotation, and 3) having a second refiner surface facing outward and away from the second mounting surface;a plurality of refiner bars protruding axially from and extending generally radially along the second refiner surface;wherein the second refiner surface defines a second refining plane 1) that is disposed generally parallel to the plane that is generally perpendicular to the axis of rotation of the carrier element, 2) that is disposed at an angle that is acute relative to the first refining plane, and 3) that intersects the first refining plane.