Patent ID: 8226023
Filing Date: 2012-07-24
Classification: B02C,D21D

Abstract:
1. A refiner ( 1 ) comprising a stator ( 2 ) and a rotor ( 4 ), the stator ( 2 ) and the rotor ( 4 ) comprising a flat portion ( 7 , 9 ) and a conical portion ( 8 , 10 ), the conical portion ( 8 ) having a first end ( 17 ) of smaller diameter (D 1 ) and a second end ( 18 ) of greater diameter (D 2 ) such that the first end ( 17 ) of the conical portion ( 8 , 10 ) having smaller diameter (D 1 ) is directed towards the flat portion ( 7 , 9 ) and the second end ( 18 ) of the conical portion ( 8 , 10 ) having greater diameter (D 2 ) is directed away from the flat portion ( 7 , 9 ), and which flat portion ( 7 , 9 ) and the conical portion ( 8 , 10 ) comprise refining surfaces ( 11 , 12 , 13 , 14 ) provided with blade bars ( 20 ) and blade grooves ( 21 ) therebetween, and that the refining surface ( a portion of the length of the blade bars ( this portion of the length of the blade bars (