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Class Information
Number: 162/55
Name: Paper making and fiber liberation > Processes of chemical liberation, recovery or purification of natural cellulose or fibrous material > With classifying, separating or screening of pulp (solids from solids)
Description: Processes combined with a step of separating solid components of the fibrous material undergoing chemical treatment, from one another, in grades or classes according to physical characteristics.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7601243 |
Method for conveying, mixing, and leveling dewatered pulp prior to drying |
Oct. 13, 2009 |
| 7597201 |
Device for cleaning fibrous suspensions for paper production |
Oct. 6, 2009 |
| 7560008 |
Extraction with compaction and springback considerations |
Jul. 14, 2009 |
| 7491296 |
Multi-stage screening apparatus, screen basket and method for screening pulp suspensions |
Feb. 17, 2009 |
| 7452444 |
Digester wash extraction by individual screen flow control |
Nov. 18, 2008 |
| 7399377 |
Process for singulating cellulose fibers from a wet pulp sheet |
Jul. 15, 2008 |
| 7396435 |
Method for conveying, mixing, and leveling dewatered pulp prior to drying |
Jul. 8, 2008 |
| 7384503 |
Determination of contaminant particles in an aqueous pulp |
Jun. 10, 2008 |
| 7381295 |
Pulp fractionation using centrifugal cleaners and power screens with multi-layer headbox and deaeration tank |
Jun. 3, 2008 |
| 7364638 |
Process for the hot dispersing of a paper fiber stock |
Apr. 29, 2008 |
| 7334347 |
Process for producing dried, singulated fibers using steam and heated air |
Feb. 26, 2008 |
| 7311848 |
Separation apparatus |
Dec. 25, 2007 |
| 7294226 |
Method of removing high density stickies from secondary papermaking fibers |
Nov. 13, 2007 |
| 7290353 |
System for making dried singulated crosslinked cellulose pulp fibers |
Nov. 6, 2007 |
| 7285180 |
Perforated deck made out of a plurality of segments |
Oct. 23, 2007 |
| 7282115 |
Method for mitigating the interference caused by high-molecular weight-by-products in pulping processes |
Oct. 16, 2007 |
| 7279073 |
Apparatus for liquid-based fiber separation |
Oct. 9, 2007 |
| 7198695 |
Method for separating hemicelluloses from a biomass containing hemicelluloses and biomass and hemicelluloses obtained by said method |
Apr. 3, 2007 |
| 7169263 |
Coarse dirt collector for removing coarse material from a pulper and corresponding method |
Jan. 30, 2007 |
| 7163106 |
Strainer for cleaning fibrous suspensions |
Jan. 16, 2007 |
| 7163604 |
Production of fiber suspension from waste paper |
Jan. 16, 2007 |
| 7147750 |
Extraction with compaction and springback considerations |
Dec. 12, 2006 |
| 7141139 |
Multiple cleaning stages with various dilution points and accepts recirculated through a common pipe |
Nov. 28, 2006 |
| 7125472 |
Slotted screen for digester |
Oct. 24, 2006 |
| 7097740 |
Method and screen for screening at least two pulp mixtures |
Aug. 29, 2006 |
| 7083049 |
Method of regulating sorting systems and a sorting system suitable for carrying out this method |
Aug. 1, 2006 |
| 7077930 |
Method for controlling screening by measuring flow amount consistency of the pulp |
Jul. 18, 2006 |
| 7063770 |
Method of removing high density stickies from secondary papermaking fibers |
Jun. 20, 2006 |
| 7005034 |
Method in connection with the production of mechanical pulp |
Feb. 28, 2006 |
| 6923889 |
Printing paper |
Aug. 2, 2005 |
| 6911118 |
Pulper for producing paper pulp from waste paper |
Jun. 28, 2005 |
| RE38738 |
Cylindrical screen, particularly for paper pulp |
May. 31, 2005 |
| 6883669 |
Multi-element airfoil for pulp screens |
Apr. 26, 2005 |
| 6881297 |
Process for aerating dispersions |
Apr. 19, 2005 |
| 6881299 |
Refiner bleaching with magnesium oxide and hydrogen peroxide |
Apr. 19, 2005 |
| 6872316 |
Recovery of xylose |
Mar. 29, 2005 |
| 6846381 |
Method for controlling quality of pulp |
Jan. 25, 2005 |
| 6843886 |
Method for handling filled reject flows in a paper or paperboard mill |
Jan. 18, 2005 |
| 6827820 |
Degassing centrifugal apparatus, process for pumping and degassing a fluid and process for producing paper or board |
Dec. 7, 2004 |
| 6818099 |
Raw material for printing paper, method to produce it and printing paper |
Nov. 16, 2004 |
| 6782637 |
System for making dried singulated crosslinked cellulose pulp fibers |
Aug. 31, 2004 |
| 6769199 |
Process for producing dried singulated cellulose pulp fibers using a jet drier and injected steam and the product resulting therefrom |
Aug. 3, 2004 |
| 6743332 |
High temperature peroxide bleaching of mechanical pulps |
Jun. 1, 2004 |
| 6740198 |
Method and arrangement for mixing pulp components in the manufacture of paper |
May. 25, 2004 |
| 6719878 |
Method for avoiding mechanical damage of pulp |
Apr. 13, 2004 |
| 6705554 |
Rotor for a paper stock processing machine, anti-wear element for such a rotor, and paper stock processing apparatus |
Mar. 16, 2004 |
| 6649068 |
Filtration of pulp mill liquids |
Nov. 18, 2003 |
| RE38317 |
Method and apparatus for treating filler-containing material, such as recycled fibers |
Nov. 18, 2003 |
| 6613191 |
Pressurized screen and process for removing contaminants from a fibrous paper suspension containing contaminants |
Sep. 2, 2003 |
| 6605184 |
Method and apparatus for treatment of fiber suspension containing minerals, such as coated broke, in paper production |
Aug. 12, 2003 |
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