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Class Information
Number: 162/242
Name: Paper making and fiber liberation > Apparatus > Digester > Combined
Description: Apparatus having means combined with or in addition to digester structures which means either perfects the operation of the digester or performs some function other than digestion.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7229524 |
Feeding arrangement for feeding of chips to chip bins |
Jun. 12, 2007 |
| 6966970 |
Method for supplying washing liquid to a process for cooking cellulose pulp |
Nov. 22, 2005 |
| 6755941 |
Apparatus for loading fibers with calcium carbonate |
Jun. 29, 2004 |
| 6733625 |
Method and apparatus for treating pulp |
May. 11, 2004 |
| 6447645 |
Feeding cellulose material to a treatment vessel |
Sep. 10, 2002 |
| 6436233 |
Feeding cellulose material to a treatment vessel |
Aug. 20, 2002 |
| 6379504 |
Apparatus for pulping sawdust |
Apr. 30, 2002 |
| 6139689 |
Apparatus for digesting pulp in a displacement batch digester that uses displacement liquor having a sufficient hydrostatic head |
Oct. 31, 2000 |
| 5942088 |
Apparatus for bleaching high consistency pulp with a gaseous bleaching reagent |
Aug. 24, 1999 |
| 5800674 |
Method and apparatus for improving a batch cooking process |
Sep. 1, 1998 |
| 5744004 |
System for feeding a suspension to a pressurized vessel |
Apr. 28, 1998 |
| 5716497 |
Method and device for the continuous cooking of pulp |
Feb. 10, 1998 |
| 5681427 |
Apparatus for treating pulp produced by solvent pulping |
Oct. 28, 1997 |
| 5650045 |
Apparatus and method for wood pulp digester |
Jul. 22, 1997 |
| 5571384 |
Method and arrangement for the treatment of a fiber suspension |
Nov. 5, 1996 |
| 5413677 |
Method for producing chemical pulp from hardwood chips |
May. 9, 1995 |
| 5338451 |
Apparatus for treating pulp |
Aug. 16, 1994 |
| 5236553 |
Continuous cooking with reduced horsepower and pulp degradation |
Aug. 17, 1993 |
| 5192396 |
Process for the continuous digestion of cellulosic fiber material |
Mar. 9, 1993 |
| 5172867 |
Utilization of a paper pulp digester as a structural support |
Dec. 22, 1992 |
| 5164042 |
Method and plant for producing high-yield pulp from pulp chip material containing lignocellulose |
Nov. 17, 1992 |
| 5089089 |
System for sulfonating mechanical pulp fibers |
Feb. 18, 1992 |
| 5080755 |
Process for the continuous digestion of cellulosic fiber material |
Jan. 14, 1992 |
| 5059284 |
Apparatus to displace a digester from both ends |
Oct. 22, 1991 |
| 5053108 |
High sulfidity cook for paper pulp using black liquor sulfonization of steamed chips |
Oct. 1, 1991 |
| 4975148 |
Cold blow system for batch production of pulp |
Dec. 4, 1990 |
| 4915784 |
Process and apparatus for removing contaminants from pulp digester vent gas |
Apr. 10, 1990 |
| 4762591 |
Apparatus for reacting lignocellulosic material with a gas phase comprising a nitrogen oxide and oxygen under controlled gas pressure |
Aug. 9, 1988 |
| 4693785 |
Digester having plural screens and means for controlling the liquid withdrawal |
Sep. 15, 1987 |
| 4684442 |
Oxygen reactor deaeration tank and system |
Aug. 4, 1987 |
| 4662993 |
Bleach system for dissolving chlorine gas into a bleach filtrate |
May. 5, 1987 |
| 4375410 |
Reciprocating diffuser arrangements in an elongated vessel |
Mar. 1, 1983 |
| 4276167 |
Diffuser arrangements |
Jun. 30, 1981 |
| 4269656 |
Wood pulp forming system and method of recovering spent chemicals |
May. 26, 1981 |
| 4238285 |
Digester system for delivering wood chips in an even layer into a digester |
Dec. 9, 1980 |
| 4214947 |
Process for the continuous impregnation of a cellulosic material |
Jul. 29, 1980 |
| 4213822 |
Apparatus for displacement washing of fibrous material suspended in a liquid |
Jul. 22, 1980 |
| 4133714 |
Reaction vessel with pulsating means for producing lignocellulose product from crushed vegetable raw materials |
Jan. 9, 1979 |
| 4123318 |
Three-vessel treatment system |
Oct. 31, 1978 |
| 4120748 |
Digester system for delivering wood chips in an even layer into a digester |
Oct. 17, 1978 |
| 4088528 |
Method and apparatus for grinding chips into paper pulp |
May. 9, 1978 |
| 4062722 |
Device for treating deformable particles with the counterflowing liquids |
Dec. 13, 1977 |
| 4002528 |
Apparatus for processing pulp |
Jan. 11, 1977 |
| 3947314 |
Method of treating paper fibers in a stationary screen |
Mar. 30, 1976 |
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