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Class Information
Number: 162/243
Name: Paper making and fiber liberation > Apparatus > Digester > With pulp agitating or circulating means
Description: Apparatus having means to maintain the stock material undergoing digestion in a state of motion.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7368037 |
Refiner steam separation system for reduction of dryer emissions |
May. 6, 2008 |
| 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 |
| 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 |
| 6767432 |
Apparatus for the thickening of fiber suspensions |
Jul. 27, 2004 |
| 6755941 |
Apparatus for loading fibers with calcium carbonate |
Jun. 29, 2004 |
| 6582554 |
Continuous digester having a sectioned top separator with multiple liquor extraction ports |
Jun. 24, 2003 |
| 6551462 |
System for feeding comminuted fibrous material |
Apr. 22, 2003 |
| 6464826 |
Method for producing and treating wood fiber |
Oct. 15, 2002 |
| 6436233 |
Feeding cellulose material to a treatment vessel |
Aug. 20, 2002 |
| 6379504 |
Apparatus for pulping sawdust |
Apr. 30, 2002 |
| 6375796 |
Method of treating material in a continuous digester |
Apr. 23, 2002 |
| 6358363 |
Method and apparatus for bleaching pulp using two fluidizing mixers |
Mar. 19, 2002 |
| 6332954 |
Continuous digester system having a top separator |
Dec. 25, 2001 |
| 6280575 |
Frusto-conical outlet for a cellulose material treatment vessel |
Aug. 28, 2001 |
| 6210532 |
Means for conveying pulp having differential pressure control |
Apr. 3, 2001 |
| 6156159 |
Device for mixing of a fluid into a pulp-suspension |
Dec. 5, 2000 |
| 6129816 |
Tapered screen assembly for a cellulose pulp digester |
Oct. 10, 2000 |
| 6077396 |
Apparatus for fluffing and contacting high consistancy wood pulp with a gaseous bleaching reagent |
Jun. 20, 2000 |
| 6063238 |
Black liquor impregnation in digester |
May. 16, 2000 |
| 5942088 |
Apparatus for bleaching high consistency pulp with a gaseous bleaching reagent |
Aug. 24, 1999 |
| 5918978 |
Device for mixing chemicals into a fibrous material suspension |
Jul. 6, 1999 |
| 5863389 |
Pulp bleaching reactor for dispersing high consistency pulp into a gaseous bleaching agent containing ozone |
Jan. 26, 1999 |
| 5813758 |
Concentric ring fluidizing mixer |
Sep. 29, 1998 |
| 5762760 |
Reactor for treating pulp with a gas |
Jun. 9, 1998 |
| 5746890 |
Device for admixing a processing agent into a pulp suspension |
May. 5, 1998 |
| 5736005 |
Scraper device for a continuous digester |
Apr. 7, 1998 |
| 5711852 |
Method and device for mixing of a fluid into a pulp-suspension |
Jan. 27, 1998 |
| H1681 |
Discharge from pulping vessels without the aid of mechanical agitation |
Oct. 7, 1997 |
| 5672245 |
Recycling of knots in a continuous process for cooking chemical pulp |
Sep. 30, 1997 |
| 5658428 |
Method for impregnation in a single-vessel hydraulic digester |
Aug. 19, 1997 |
| 5630909 |
Pulp fluffing gas contactor |
May. 20, 1997 |
| 5591308 |
Wood pulp reactor |
Jan. 7, 1997 |
| 5589036 |
Controlling pulp flow in an upflow pulp treatment tower |
Dec. 31, 1996 |
| 5562806 |
Variable angle powered cyclone |
Oct. 8, 1996 |
| 5536367 |
Pulp digester cleaning system |
Jul. 16, 1996 |
| 5536373 |
Recycle processing of baled waste material |
Jul. 16, 1996 |
| 5520783 |
Apparatus for bleaching high consistency pulp with ozone |
May. 28, 1996 |
| 5496445 |
Method and apparatus for waste paper treatment |
Mar. 5, 1996 |
| 5472572 |
Reactor for bleaching high consistency pulp with ozone |
Dec. 5, 1995 |
| 5451296 |
Two stage pulp bleaching reactor |
Sep. 19, 1995 |
| 5407268 |
Kneader for the treatment of fibrous pulp suspensions |
Apr. 18, 1995 |
| 5382326 |
Ozone mixing test apparatus |
Jan. 17, 1995 |
| 5378321 |
Varying annular fluidization zone for increased mixing efficiency in a medium consistency mixer |
Jan. 3, 1995 |
| 5346591 |
Apparatus for treatment of chips with heated black liquor |
Sep. 13, 1994 |
| 5271672 |
Apparatus having rotating arms and fluid outlet for treating and discharging a medium |
Dec. 21, 1993 |
| 5263774 |
Rotor for increasing mixing efficiency in a medium consistency mixer |
Nov. 23, 1993 |
| 5258100 |
Minimizing gas separation in a mixer outlet |
Nov. 2, 1993 |
| 5198075 |
Digestion method and installation with preheating of lignocellulose materials in solid phase |
Mar. 30, 1993 |
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