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Class Information
Number: 162/237
Name: Paper making and fiber liberation > Apparatus > Digester > Continuous
Description: Devices provided with means to charge and discharge the digester at substantially the same rate, whereby a more or less steady flow of material is maintained through the treating device.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7615134 |
Method and arrangement of impregnating chips |
Nov. 10, 2009 |
| 7604711 |
Method to optimize temperature profiles displacement batch cooking |
Oct. 20, 2009 |
| 7547374 |
Method for impregnating chips in a continuous digestion system |
Jun. 16, 2009 |
| 7497927 |
Continuous digester with fluid circulation |
Mar. 3, 2009 |
| 7381302 |
Method and arrangement for impregnating chips |
Jun. 3, 2008 |
| 7309401 |
Top separator for gas phase and hydraulic phase continuous digesters and method for converting digester |
Dec. 18, 2007 |
| 7285179 |
Continuous digester for cellulose pulp including method and recirculation system for such digester |
Oct. 23, 2007 |
| 7241363 |
Methods to decrease scaling in digester systems |
Jul. 10, 2007 |
| 7229524 |
Feeding arrangement for feeding of chips to chip bins |
Jun. 12, 2007 |
| 7156952 |
Method and arrangement for oxygen delignification of cellulose pulp |
Jan. 2, 2007 |
| 7147750 |
Extraction with compaction and springback considerations |
Dec. 12, 2006 |
| 7115189 |
Slotted screen for digester |
Oct. 3, 2006 |
| 7105076 |
Gas phase continuous digester having an inverted top separator with liquor injection |
Sep. 12, 2006 |
| RE39208 |
Method of treating material in a continuous digester |
Aug. 1, 2006 |
| 7060162 |
Chip bin |
Jun. 13, 2006 |
| 6966970 |
Method for supplying washing liquid to a process for cooking cellulose pulp |
Nov. 22, 2005 |
| 6958110 |
Apparatus for the production of cellulose paper pulps by biodelignification of vegetative masses |
Oct. 25, 2005 |
| 6841042 |
Feeding comminuted fibrous material using high pressure screw and centrifugal pumps |
Jan. 11, 2005 |
| 6808596 |
System for the oxygen delignification of pulp consisting of lignocellulose-containing material |
Oct. 26, 2004 |
| 6582554 |
Continuous digester having a sectioned top separator with multiple liquor extraction ports |
Jun. 24, 2003 |
| 6569289 |
Cellulose slurry treating systems for adding AQ to a cellulose slurry in the substantial absence of alkali |
May. 27, 2003 |
| 6447645 |
Feeding cellulose material to a treatment vessel |
Sep. 10, 2002 |
| 6379504 |
Apparatus for pulping sawdust |
Apr. 30, 2002 |
| 6375796 |
Method of treating material in a continuous digester |
Apr. 23, 2002 |
| 6344112 |
Screen having inclined slots for a digester |
Feb. 5, 2002 |
| 6248208 |
Pretreatment of chips before cooking |
Jun. 19, 2001 |
| 6174411 |
Continuous digester with inverted top separator |
Jan. 16, 2001 |
| 6129816 |
Tapered screen assembly for a cellulose pulp digester |
Oct. 10, 2000 |
| 6120646 |
Feeding system of feeding a cellulose material |
Sep. 19, 2000 |
| 6109312 |
Air evacuation insert for wood chip digester |
Aug. 29, 2000 |
| 6071375 |
Gas purge protection of sensors and windows in a gas phase processing reactor |
Jun. 6, 2000 |
| 6039841 |
Screen having inclined slots for use in a continuous digester |
Mar. 21, 2000 |
| 6024837 |
Low temperature gas phase continuous digester |
Feb. 15, 2000 |
| 5919337 |
Method of continuously isothermally cooking of pulp |
Jul. 6, 1999 |
| 5795438 |
Method and apparatus for feeding multiple digesters |
Aug. 18, 1998 |
| 5783037 |
System and method for operating a pulp mill |
Jul. 21, 1998 |
| 5766418 |
Handling fibrous material used to produce cellulose pulp |
Jun. 16, 1998 |
| 5753075 |
Method and system for feeding comminuted fibrous material |
May. 19, 1998 |
| 5744004 |
System for feeding a suspension to a pressurized vessel |
Apr. 28, 1998 |
| 5736006 |
Method and apparatus for pulping with controlled heating to improve delignification and pulp strength |
Apr. 7, 1998 |
| 5716497 |
Method and device for the continuous cooking of pulp |
Feb. 10, 1998 |
| 5679217 |
Method and apparatus for optimizing the liquor-to-wood ratio during the production of paper pulp |
Oct. 21, 1997 |
| 5674359 |
Continuous cooking of cellulosic fibrous material with cold alkali impregnation |
Oct. 7, 1997 |
| 5567280 |
Digester for cooking pulp having staggered circular screens for isothermal cooking |
Oct. 22, 1996 |
| 5503711 |
Method of rehabilitating a wood pulp digester |
Apr. 2, 1996 |
| 5500084 |
Method and apparatus for pulping cellulosic material using a vessel with an impergnation zone and an attrition zone |
Mar. 19, 1996 |
| 5470437 |
Digester for cooking pulp having staggered screens |
Nov. 28, 1995 |
| 5372679 |
Reactor system for treating cellulosic pulp at a constant upward flow velocity |
Dec. 13, 1994 |
| 5256255 |
Displacement heating in continuous digesters |
Oct. 26, 1993 |
| 5236553 |
Continuous cooking with reduced horsepower and pulp degradation |
Aug. 17, 1993 |
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