Paper making and fiber liberation – Apparatus – Digester
Reexamination Certificate
2008-10-30
2010-02-09
Halpern, Mark (Department: 1791)
Paper making and fiber liberation
Apparatus
Digester
C162S233000, C162S049000, C162S052000
Reexamination Certificate
active
07658820
ABSTRACT:
A continuous digester comprises a wash zone having a plurality of individual wash screens disposed about an inner wall of the digester for the withdrawal of co-current downflow liquor from the wash zone. A conduit is connected in fluid communication between each of the wash screens and a collector for co-current downflow liquor withdrawn from the wash zone of the digester. A valve is interposed along the length of the conduit leading from each of the wash screens. The valve is operable between open and closed positions in response to a signal received from a temperature sensor associated with the conduit leading from each of the wash screens. The signal represent changes in temperature of a corresponding co-current down flow liquor through a corresponding conduit wherein a corresponding valve permits adjustment of a corresponding flow rate of liquor through said corresponding conduit to a flow rate that is substantially equal to each of the other flow rates of co-current downflow liquor through each of the other conduits.
REFERENCES:
patent: 5401361 (1995-03-01), Prough et al.
patent: 5489363 (1996-02-01), Marcoccia et al.
patent: 5536366 (1996-07-01), Marcoccia et al.
patent: 5547012 (1996-08-01), Marcoccia et al.
patent: 5575890 (1996-11-01), Prough et al.
patent: 5620562 (1997-04-01), Marcoccia et al.
patent: 5635026 (1997-06-01), Kettunen et al.
patent: 5662775 (1997-09-01), Marcoccia et al.
patent: 5674359 (1997-10-01), Chasse et al.
patent: 5691922 (1997-11-01), McEwan et al.
patent: 5753075 (1998-05-01), Stromberg et al.
patent: 5795438 (1998-08-01), Stromberg et al.
patent: 5824188 (1998-10-01), Prough et al.
patent: 5849150 (1998-12-01), Marcoccia et al.
patent: 5849151 (1998-12-01), Marcoccia et al.
patent: 5958181 (1999-09-01), Stromberg et al.
patent: 5985096 (1999-11-01), Marcoccia et al.
patent: 6086712 (2000-07-01), Marcoccia et al.
patent: 6106668 (2000-08-01), Stromberg et al.
patent: 6132556 (2000-10-01), Stromberg et al.
patent: 6159337 (2000-12-01), Marcoccia et al.
patent: 6169761 (2001-01-01), Marcoccia et al.
patent: 6241851 (2001-06-01), Marococcia
patent: 6277240 (2001-08-01), Marcoccia et al.
patent: 6280568 (2001-08-01), Marcoccia et al.
patent: 6346167 (2002-02-01), Marcoccia et al.
patent: 2002/0069986 (2002-06-01), Marcoccia et al.
patent: 0937813 (1999-08-01), None
Smart Filtrate Addition—Glens Falls Group offers a simple, low cost, high return modification for continuous cooking systems, Fiber and Pulp Industry, Jul. 2002.
New Filtrate Addition System results in Improved Digester performance, Gerry Pageau, BASc, PEng, MEng. p. 1-7.
Code David R
Hill Wayne G
Lawrence Dean K
Ludwig Stanislaus L
Barnes, III Thomas W.
Eslami Matthew M.
Halpern Mark
International Paper Company
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