Refiner filling piece having variably coated bars
AssigneeAikawa Fiber Technologies Oy
InventorsJens O. Heymer, Ronald J. Defoe, Robert William Gooding
Life of this patent
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Abstract
Disclosed is a refiner filling piece for a refiner having a rotor that rotates about an axis of rotation and cooperates with a stator to mechanically treat a pulp containing cellulosic fibers. The refiner filling piece is mountable to the rotor or the stator. The refiner filling piece comprises a base and a plurality of spaced-apart refiner bars, each refiner bar being defined by a bar length and a bar height. At least some of the refiner bars have a surface coated with a variable coating. The surface having the variable coating may be the leading surface of the bar.
Claims18
A refiner filling piece for a refiner having a rotor that rotates about an axis of rotation and cooperates with a stator to mechanically treat a pulp containing cellulosic fibers, the refiner filling piece being mountable to the rotor or the stator, the refiner filling piece comprising:
- a base;
- a plurality of spaced-apart refiner bars, each refiner bar being defined by a bar length and a bar height;
- and
- wherein at least some of the refiner bars have a surface coated with a variable thickness coating, wherein the variable thickness coating begins at a point that is between a midpoint of the bar height and a quarter of the bar height above the base.
Dependencies are inferred from the claim text.