Screening apparatus for fiber suspensions
AssigneeHermann Finckh Maschinenfabrik GmbH & Co.
InventorEmil Holz
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Abstract
A screening apparatus for fiber suspensions comprising a stationary cylindrical screen one side of which is in flow communication with the inlet for the fiber suspension and the other side, from which the accepted stock emerges, forming an annular space with a rotor comprising a cylindrical wall having elevations for producing positive and negative pressure thrusts serving to keep the screen clear and openings behind the projections through which some of the accepted stock passes to provide an alternative path to the outlet for the accepted stock.
Claims9
A screening apparatus for fiber suspensions comprising a housing and a stationary cylindrical screen cage having one side in flow communication with an inlet for said fiber suspensions and further having screen openings through which fiber suspension from the inlet flows as accepted stock;
- a rotor having a hollow cylindrical, substantially closed circumferential wall concentrically mounted relative to the screen cage over substantially the length thereof with one side adjacent the side of the screen cage not in direct flow communication with the inlet to form an annular space between the screen cage and the circumferential wall of the rotor for accepted stock, the circumferential wall of the rotor further having elevations extending into the annular space immediately radially adjacent the screen openings for producing positive and negative pressure thrusts in the accepted stock within the annular space, and openings through which some accepted stock passes, the openings in the rotor wall being larger than the screen openings;
- and an outlet for the accepted stock connected to both the annular space and the opposite side of the rotor.
Dependencies are inferred from the claim text.