Metso Paper Inc.

Valmet Technologies, Inc.

Timo Könönen

Håkan Sjöström

Matti Kaarineva

Marko Loijas

A blade element () for a refiner () for refining fibrous material has a blade element body () and blade bars () and blade grooves () therebetween. Bottoms of the blade grooves () have, in the longitudinal direction (LD) of the blade grooves, a variable depth profile comprising alternating high points (') and low points (&#x2033;) so that there is a phase shift (X) between the high points (&#x2032;) and the low points (&#x2033;) of the variable depth profiles of the bottoms of the adjacent blade grooves (). Also, a refiner () for refining fibrous material and a method for manufacturing the blade element () for the refiner ().

Blade element for refiner

A refiner blade comprising a blade surface for defibrating a lignocellulose-containing material, the blade surface comprising blade bars and blade grooves provided therebetween. At least one blade groove provided in the blade surface is formed by removing material from the blade surface by water cutting.

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Nokia, Finland

Timo Könönen