Refiner and blade element
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United States of America Patent
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Sep 15, 2015
Grant Date -
Nov 21, 2013
app pub date -
Jan 26, 2012
filing date -
Jan 27, 2011
priority date (Note) -
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Abstract
A refiner (10, 11) for refining fibrous material has a first refining surface (1′) and a second refining surface (2′) arranged opposite to one another and mobile in relation to one another. The refining surfaces have refining surface portions (15, 27) feeding material to be refined and/or discharging refined material as well as refining surface portions (16) grinding the material to be refined, on the upper surface of which there are blade bars (17) and between them blade grooves (18). In the refining surface (1′, 2′) of the refiner (10, 11) the cross-sectional area (A) of at least some blade grooves (18) is arranged to decrease from one blade groove (18) to the next from the direction of the feed edge (13) to the direction of the discharge edge (14) of the refining surface (1′, 2′).
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