Metso Paper Inc.

Sunds Defibrator Industries Ab

Per Fröberg

Nils G Virving

Håkan Sjöström

Petteri Vuorio

Matti Kaarineva

Juha-Pekka Huhtanen

Veikko Kankaanpää

Juha Makivaara

Vesa Arjanmaa

A refining surface of a refining member, adapted for use with a refiner for defibrating a lignocellulose-containing material, is provided. Such a refining surface comprises a plurality of first grooves, each first groove being defined between two adjacent first bar portions of the refining surface, and extending between opposing first and second radial edges of the refining surface. The refining surface further comprises a plurality of second grooves, each second groove being defined between two adjacent second bar portions of the refining surface forming each first bar portion, and extending between two adjacent second grooves. The first bar portions are wider than the second bar portions, and each second bar portion are between about 1 mm and about 3 mm wide. A blade segment of a refining member is also provided.

Refining surface and a blade segment for a refiner

Refining element

Growing community of inventors

Tampere, Finland

Per Fröberg