Screen assembly for a pulp digester

Details Screen assembly for a pulp digester Screen assembly for a pulp digester

2004-12-14

2010-06-15

Halpern, Mark (Department: 1791)

Paper making and fiber liberation

Apparatus

Digester

C162S233000, C162S237000, C162S248000, C422S217000, C422S187000, C210S498000, C210S499000, C210S357000

Reexamination Certificate

active

07736467

ABSTRACT:
A pulp digester includes a vessel having an inlet, an outlet and a wall extending between the inlet and the outlet, the wall of the vessel having a curved interior surface. The digester includes a screen assembly positioned inside the vessel adjacent to the curved interior surface of the wall for removing liquid from pulp material. The screen assembly is movable relative to the curved interior surface of the vessel wall. The digester includes at least one support element permanently attached to the vessel wall for limiting movement of the screen assembly relative to the curved interior surface of the vessel wall. In certain embodiments, the at least one support, such as a ledge permanently attached to the vessel wall, supports a portion of the screen assembly. The screen assembly may have an inner face that is concave in a horizontal direction and convex in a vertical direction.

REFERENCES:
patent: 1487004 (1924-03-01), Allen
patent: 5985096 (1999-11-01), Marcoccia et al.
patent: 6129816 (2000-10-01), Sheerer et al.
patent: 6312590 (2001-11-01), Isola
patent: 6375796 (2002-04-01), Sheerer et al.
patent: 2003/0095901 (2003-05-01), Isola
patent: WO 01/31117 (2001-05-01), None

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