REFINER FILLING PIECE HAVING MULTIPLE COATINGS ON BARS
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United States of America Patent
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Issued Date -
Jan 23, 2025
app pub date -
Dec 7, 2022
filing date -
Dec 7, 2022
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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 having a leading surface and a trailing surface. At least one of the refiner bars has a leading surface coated with a first coating and a trailing surface coating with a second coating. The first and second coatings have different chemical compositions and/or different physical properties. Alternatively, the first and second coatings may be applied to distinct portions of the same surface.
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