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Class Information
Number: 162/251
Name: Paper making and fiber liberation > Apparatus > Digester > Strainers
Description: Apparatus having a foraminous screen at an outlet of the digester to retain stock material and permit the passage of fluid therethrough.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7566380 |
Continuous digester with fluid circulation |
Jul. 28, 2009 |
| 7547374 |
Method for impregnating chips in a continuous digestion system |
Jun. 16, 2009 |
| 7497927 |
Continuous digester with fluid circulation |
Mar. 3, 2009 |
| 7491296 |
Multi-stage screening apparatus, screen basket and method for screening pulp suspensions |
Feb. 17, 2009 |
| 7147750 |
Extraction with compaction and springback considerations |
Dec. 12, 2006 |
| 7125472 |
Slotted screen for digester |
Oct. 24, 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 |
| 7097740 |
Method and screen for screening at least two pulp mixtures |
Aug. 29, 2006 |
| RE39208 |
Method of treating material in a continuous digester |
Aug. 1, 2006 |
| 6883669 |
Multi-element airfoil for pulp screens |
Apr. 26, 2005 |
| 6649068 |
Filtration of pulp mill liquids |
Nov. 18, 2003 |
| 6569289 |
Cellulose slurry treating systems for adding AQ to a cellulose slurry in the substantial absence of alkali |
May. 27, 2003 |
| 6553593 |
Plate diffuser for treating comminuted cellulosic fibrous material |
Apr. 29, 2003 |
| 6451172 |
In-line drainer enhancements |
Sep. 17, 2002 |
| 6375796 |
Method of treating material in a continuous digester |
Apr. 23, 2002 |
| 6348130 |
Variable pressure screening |
Feb. 19, 2002 |
| 6344112 |
Screen having inclined slots for a digester |
Feb. 5, 2002 |
| 6325889 |
Hydraulic vessel system having a downwardly feeding separator |
Dec. 4, 2001 |
| 6311849 |
Device for dehydrating and washing suspensions of fibrous material |
Nov. 6, 2001 |
| 6311850 |
Pressure screening apparatus for screening a paper stock suspension and screen clearer for such a screening apparatus |
Nov. 6, 2001 |
| 6287416 |
Sampling apparatus with removable filter for cleaning |
Sep. 11, 2001 |
| 6284145 |
Screen plate for screening of a pulp suspension and method to separate the same |
Sep. 4, 2001 |
| 6272710 |
Plate diffuser for treating comminuted cellulosic fibrous material |
Aug. 14, 2001 |
| 6261417 |
Dehydrating concentrator |
Jul. 17, 2001 |
| 6254729 |
Pulper with extraction plate assembly having removable inserts and method of manufacturing same |
Jul. 3, 2001 |
| 6214171 |
Top separator in a continuous digester system |
Apr. 10, 2001 |
| 6171494 |
Hydraulic vessel system having a downwardly feeding separator |
Jan. 9, 2001 |
| 6165323 |
Screen plate having a plurality of inclined slots in a digester |
Dec. 26, 2000 |
| 6149015 |
Screen apparatus for papermaking material |
Nov. 21, 2000 |
| 6129816 |
Tapered screen assembly for a cellulose pulp digester |
Oct. 10, 2000 |
| 6120647 |
Simplified liquid removal system for a cellulose pulp digester |
Sep. 19, 2000 |
| 6117273 |
Mechanical strainer for fibrous suspensions |
Sep. 12, 2000 |
| 6113742 |
Digester having screening arrangement for isothermal cooking of fibrous material |
Sep. 5, 2000 |
| 6063238 |
Black liquor impregnation in digester |
May. 16, 2000 |
| 6051103 |
Paper-making screen apparatus |
Apr. 18, 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 |
| 5985096 |
Vertical pulping digester having substantially constant diameter |
Nov. 16, 1999 |
| 5942336 |
Methods for recycling flush water and waste solids in a wood panel fabrication process |
Aug. 24, 1999 |
| 5925216 |
Method of continuous pulping in a digester with high black liquor usage in the impregnation stage |
Jul. 20, 1999 |
| 5925249 |
Screening arrangement |
Jul. 20, 1999 |
| 5836181 |
Diffuser |
Nov. 17, 1998 |
| 5827401 |
Screen system for a continuous digester |
Oct. 27, 1998 |
| 5810172 |
Methods for recycling flush water and waste solids in a wood panel fabrication process |
Sep. 22, 1998 |
| 5799798 |
Screen cylinder for screening high consistency pulp |
Sep. 1, 1998 |
| 5770072 |
Multiple inlet valve with means to isolate each inlet individually and direct a reverse flow therethrough |
Jun. 23, 1998 |
| 5744005 |
Self-supporting straining device for a continuous digester |
Apr. 28, 1998 |
| 5716497 |
Method and device for the continuous cooking of pulp |
Feb. 10, 1998 |
| 5681453 |
Reciprocal movable screens in a vertically elongated vessel |
Oct. 28, 1997 |
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