Patent ID: 8006924

Claim:
A refiner plate assembly for refining pulp in a disk refiner having a refiner plate mounting surface, said refiner plate assembly comprising: an adapter subplate defining a segment mounting surface and an evacuation channel leading from an intermediate location of the refiner plate assembly to an outer periphery of the adapter subplate; and a refiner segment having a refining surface and an underside opposite the refining surface, the refiner segment including a filter section defined by a plurality of passages extending between the refining surface and the undersurface, the plurality of passages being sized to permit steam and accept pulp fibers at the intermediate location of the refiner plate assembly to pass from the refining surface to the evacuation channel of the adapter subplate; wherein the adapter subplate is mountable to the refiner plate mounting surface of the disk refiner and the refiner segment is releasably mountable to the segment mounting surface of the adapter subplate such that the refining surface of the refiner segment is at a refining zone of the disk refiner.