Screen

Details Screen Screen

D - Textiles, Paper

21

D

D21D 5/16 (2006.01) D21D 5/02 (2006.01)

Patent

CA 2342436

The invention refers to a screen for screening material occurring in the production of paper, board and the like, particularly for screening mechanical pulp, chemical pulp, with a screen basket (2) and a rotor (300) which is largely shaped either as a paraboloid of revolution, or is conical or cylindrical, supporting several blades (3, 3'), which can be moved along the wall of the screen basket (2) when the rotor rotates, where the blades (3, 3') have convex curvature on the side (30, 30') facing the screen basket The screen is characterised by the radial clearance (ar) being lowest between the front sector (31), viewed in the direction of rotation (dr), of the surface (30, 30') of the plate-type blade (3, 3) facing the screen basket and the screen basket (2) itself, and by the clearance increasing towards the t rear edge (339) of the blade (3, 3'). The invention also refers to a blade (3, 3') for this type of screen.

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