Refiner disk

A disk segment for use in a refiner, said segment comprising:

• inner and outer arcuate peripheral edges;
• two side edges connecting said peripheral edges, said side edges and said peripheral edges cooperatively defining an inner face and an outer face;
• a refining surface on at least one of said faces;
• a first corner defined by the intersection of a first side edge, a first peripheral edge and said outer face;
• a second corner defined by the intersection of said first side edge, said first peripheral edge and said inner face;
• said corners being offset relative to each other in a direction normal to said refining surface, and said first corner projecting further away from the segment in an arcuate direction than said second corner,
• a third corner being defined by the intersection of a second side edge, said first peripheral edge and said outer face;
• a fourth corner defined by the intersection of said second side edge, said first peripheral edge and said inner face;
• said corners being offset relative to each other in a direction normal to said defining surface, said fourth corner projecting further from the segment in an arcuate direction than said third corner.

In a refiner for refining stock, said refiner including a rotatable structure and a stationary structure, said structures cooperatively defining a first refiner zone, a plurality of refining segments disposed on said structures, said refining segments on each of said structures cooperating with other segments to define an annular shaped refining surface, each of said segments including outer and inner arcuate peripheral edges, and two side edges connecting said peripheral edges, said edges defining an inner face and an outer face, the improvement comprising:

• each of said segments defining a first corner along the intersection of a first side edge, a first peripheral edge and said inner face;
• each of said segments defining a second corner along the intersection of said first side edge, said first peripheral edge and said outer face;
• said second corner being offset relative to said first corner in an axial direction;
• said side edges of said adjacent segments positioned on said structure in overlapping relation so that a first corner on one segment is in closely spaced apart relation to the second corner on the adjacent segment, and said second corner on said one segment is in closely spaced apart relation to the first corner on the adjacent segment.