Patent ID: 7614129

Claim:
A method of manufacture of a refiner filling having outer and inner perimeters defining an active refining zone of the refiner filling, having a pumping angle off-set from a radial of the refiner filling and having blades and spacers, the method characterized in the steps of: subdividing the filling into equal segments with each segment having spaced edges extending between the inner and outer perimeters, and with one segment edge lying along a pumping angle off-set from a radial; subdividing the segments into bar set clusters with each cluster having an outline and having an edge defining said pumping angle; combining the outline of two clusters to form a bar set envelope; assembling blades and spacers in the bar set envelope; severing the bar set envelope into two equal bar set clusters; assembling said clusters to form a refiner segment; and assembling said segments to form a refiner filling.