Refiner and blade element
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United States of America Patent
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Dec 29, 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 comprises at least one first refining surface (1′) and at least one second refining surface (2′), which refining surfaces (1′, 2′) are arranged opposite to one another and mobile in relation to one another. In the refiner (10, 11) either at least the first (1′) or the second (2′) refining surface comprises refining surface portions (15, 27) feeding material to be refined and/or refining surface portions (15, 27) 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). Both in the first refining surface (1′) and in the second refining surface (2′) of the refiner (10, 11) the cross-sectional area (A) of at least some blade grooves (18) are arranged to change in the longitudinal direction of the blade grooves (18).
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