Classifying – separating – and assorting solids – Sifting – Drum sifters
Reexamination Certificate
2005-12-07
2010-06-15
Mackey, Patrick (Department: 3653)
Classifying, separating, and assorting solids
Sifting
Drum sifters
C209S300000, C209S306000, C209S370000
Reexamination Certificate
active
07735655
ABSTRACT:
A screen and a method for screening pulp. The screen comprises a body, a screen cylinder arranged inside the body for screening the pulp, and an accept chamber and an accept aggregate connected with it for removing the accepted pulp fraction from the screen. The accept chamber is arranged between the screening surface of the screen cylinder and the screen body and it is arranged to expand in the radial direction of the screen cylinder outwards from the screen cylinder continuously in the longitudinal direction of the screen cylinder towards the line which is parallel to the radius of the screen cylinder and corresponds to the cross-section of the body and on which the accept aggregate is arranged.
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Alston & Bird LLP
Hageman Mark
Mackey Patrick
Metso Paper Inc.
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