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Class Information
Number: 209/306
Name: Classifying, separating, and assorting solids > Sifting > Drum sifters > Vertical > Stationary > With agitators
Description: Stationary cylindrical or drum sifters having vertical axes associated with means for agitating the material being sifted.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7597201 |
Device for cleaning fibrous suspensions for paper production |
Oct. 6, 2009 |
| 7413086 |
Inline sifter |
Aug. 19, 2008 |
| 7380671 |
Process for size classifying ammonium sulfate crystals which are present in a suspension |
Jun. 3, 2008 |
| 7168570 |
Screen cylinder with performance boosting configuration |
Jan. 30, 2007 |
| 7163106 |
Strainer for cleaning fibrous suspensions |
Jan. 16, 2007 |
| 7121411 |
Screen apparatus |
Oct. 17, 2006 |
| 7097740 |
Method and screen for screening at least two pulp mixtures |
Aug. 29, 2006 |
| 7097044 |
Dry separation of contaminants from polyester materials |
Aug. 29, 2006 |
| 6942104 |
Rotor with multiple foils for screening apparatus for papermaking pulp |
Sep. 13, 2005 |
| 6923329 |
Screen apparatus |
Aug. 2, 2005 |
| RE38738 |
Cylindrical screen, particularly for paper pulp |
May. 31, 2005 |
| 6883669 |
Multi-element airfoil for pulp screens |
Apr. 26, 2005 |
| 6726022 |
Screening device and rotor for use in a screening device |
Apr. 27, 2004 |
| 6679384 |
Method and means for paper pulp filtering |
Jan. 20, 2004 |
| 6669025 |
Screen |
Dec. 30, 2003 |
| 6631809 |
Screen for cleaning a pulp suspension |
Oct. 14, 2003 |
| 6588599 |
Screen for pulp processing |
Jul. 8, 2003 |
| 6585116 |
Screening apparatus for fiber suspension |
Jul. 1, 2003 |
| 6571957 |
Screening apparatus for fiber suspension |
Jun. 3, 2003 |
| 6550620 |
Pulp screening device |
Apr. 22, 2003 |
| 6530481 |
Pressure screen with scrap separation |
Mar. 11, 2003 |
| 6499603 |
Screen for cleaning pulp suspensions |
Dec. 31, 2002 |
| 6409023 |
Process and device for fractioning a suspension containing paper fibers |
Jun. 25, 2002 |
| 6360897 |
Screen device comprising two screen chambers for separating fiber suspensions |
Mar. 26, 2002 |
| 6338412 |
Cylindrical screen, particularly for paper pulp |
Jan. 15, 2002 |
| 6311850 |
Pressure screening apparatus for screening a paper stock suspension and screen clearer for such a screening apparatus |
Nov. 6, 2001 |
| 6254729 |
Pulper with extraction plate assembly having removable inserts and method of manufacturing same |
Jul. 3, 2001 |
| 6241102 |
Screening device |
Jun. 5, 2001 |
| 6206204 |
Screen apparatus |
Mar. 27, 2001 |
| 6193073 |
Paper stock screening apparatus and method |
Feb. 27, 2001 |
| 6170580 |
Method and apparatus for collecting, defluidizing and disposing of oil and gas well drill cuttings |
Jan. 9, 2001 |
| 6171448 |
Apparatus for screening waste paper pulp |
Jan. 9, 2001 |
| 6155427 |
Zoned pressure screen |
Dec. 5, 2000 |
| 6138838 |
Screen media and a screening passage therefore |
Oct. 31, 2000 |
| 6131742 |
Device for separating contaminants from fibre pulp suspensions |
Oct. 17, 2000 |
| 6119867 |
Screen cylinder |
Sep. 19, 2000 |
| 6117273 |
Mechanical strainer for fibrous suspensions |
Sep. 12, 2000 |
| 6029825 |
Pressure sorter for sorting fiber suspensions as well as screen for such a pressure sorter |
Feb. 29, 2000 |
| 6029821 |
Screening device |
Feb. 29, 2000 |
| 6010012 |
Fluidizing detrashing impeller |
Jan. 4, 2000 |
| 5954956 |
Modular screen cylinder and a method for its manufacture |
Sep. 21, 1999 |
| 5925249 |
Screening arrangement |
Jul. 20, 1999 |
| 5899338 |
Screening apparatus for separating light impurities from pulp suspensions |
May. 4, 1999 |
| 5884774 |
Papermaking screen |
Mar. 23, 1999 |
| 5799798 |
Screen cylinder for screening high consistency pulp |
Sep. 1, 1998 |
| 5707488 |
Screen/vortex apparatus for cleaning recycled pulp related process |
Jan. 13, 1998 |
| 5679250 |
Pressurized screen arrangement |
Oct. 21, 1997 |
| 5624558 |
Method and apparatus for screening a fiber suspension |
Apr. 29, 1997 |
| 5611434 |
Rotor for a screen grader |
Mar. 18, 1997 |
| 5607589 |
Multiple contour screening |
Mar. 4, 1997 |
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