Paper making and fiber liberation – Apparatus – Digester
Reexamination Certificate
2007-12-18
2007-12-18
Halpern, Mark (Department: 1731)
Paper making and fiber liberation
Apparatus
Digester
C162S237000, C162S246000, C162S052000, C162S041000
Reexamination Certificate
active
10823763
ABSTRACT:
A continuous digester for producing chemical cellulose pulp from cellulose chips including: a digester vessel with an upper section attached to a top separator and said vessel at least partially filled with the cellulose chips and a liquor; a top separator at least partially in said upper section having a lower chip inlet port, a chip conveyor, a screen adjacent the conveyor, an upper chip discharge chute, and a liquor outlet facing a side of the screen opposite to the conveyor, and a chip inlet conduit extending into the vessel and having a first operational mode in fluid communication with the chip inlet port and a second operational mode in which the chip inlet conduit discharges directly into the vessel.
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Bolles John F.
Stromberg C. Bertil
Sullivan Patrick J.
Vogel Keith P.
Andritz Inc.
Halpern Mark
Nixon & Vanderhye P.C.
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