| Patent Number |
Title Of Patent |
Date Issued |
| RE39688 |
Tangential discharge disk refiner |
June 12, 2007 |
| A papermaking refiner has two stationary disks mounted to the support structure of a fixed housing. A rotating disk is mounted on a shaft which extends through the housing. The support structure allows stock to circulate on both sides of the disk support structure, thus balancing flu |
| 7468136 |
Grit trap |
December 23, 2008 |
| A vortex grit trap comprising a generally vertically extending tank of circular cross-section including a separation zone having an inlet and an outlet for liquid flow to and from the tank, and in which liquid is circulated about a longitudinal axis of the tank, and, a grit collection |
| 7374637 |
Method of bleaching cellulose pulp with a main conduit for wash liquor and filtrate |
May 20, 2008 |
| The method is for bleaching cellulose pulp in a bleach line that has at least two bleaching steps. The filtrate distribution is led up through the bleaching line counter-currently to the flow of cellulose pulp established in the bleaching line. A single joint main conduit is used for |
| 7309036 |
Refining member clash control method |
December 18, 2007 |
| A control system with a sensor mounted in direct mechanical connection to a non-rotating refining member so that the sensor is responsive to axial vibration movement of the support, and an analog to digital converter directly connected to the output of the sensor without filtering. The |
| 7285180 |
Perforated deck made out of a plurality of segments |
October 23, 2007 |
| A cylindrical rotating thickening device including an axial core, a plurality of longitudinally extending spaced apart support ribs extending radially from the axial core, and a shell surrounding the support ribs and supported thereon. The shell includes a plurality of longitudinally |
| 7252739 |
Method for distributing cellulose pulp of low and medium consistency in order to form a uniform |
August 7, 2007 |
| The method is for distributing cellulose pulp that has a 2-12% consistency. A manifoid housing is in fluid communication with distributor housing. The distributor housing has holes that are distributed along a generatrix of the distribution housing. The cellulose pulp is fed into an |
| 7188792 |
Refiner rotor assembly with a hub having flow-through ports |
March 13, 2007 |
| A refiner including a material-admitting inlet and an outlet; and spaced apart first and second refining discs mounted in the chamber. The refiner further includes a rotary third ref refining disc disposed between the first and second discs. A first path for the movement of material from |
| 7186332 |
Orbital wastewater treatment system with combined surface aerator and submerged impeller |
March 6, 2007 |
| An orbital wastewater treatment system includes a tank and a partition disposed in the tank to define a pair of channels in the tank. The tank has a turning wall bounding contiguous portions of the channels. The partition has an end spaced from the turning wall, whereby the channels |
| 7005067 |
Disc-type filtration apparatus including discharge collector internal to pressure vessel and met |
February 28, 2006 |
| A positive pressure disc-type filtration apparatus including a collection trough internal to the cylindrical pressure vessel housing the filter discs. The collection trough is entirely disposed within the cylinder of the pressure vessel and configured and located to receive and direct |
| 6966985 |
Self-diluting feedwell including a vertical education mechanism |
November 22, 2005 |
| An apparatus and method of diluting a solid particle-containing slurry in conjunction with a sedimentation process. A slurry is introduced into the launder portion of a feedwell and flowed vertically downward through an eductor nozzle having its exit location placed below the liquid leve |
| 6942104 |
Rotor with multiple foils for screening apparatus for papermaking pulp |
September 13, 2005 |
| A rotor adapted for use in a hydrodynamic device comprising a cylindrical screen having a circumferentially continuous apertured zone. The rotor has an axis of rotation and includes a substantially cylindrical outer surface adjacent the cylindrical screen surface. The rotor further inclu |
| 6935367 |
Flotation cell fluid level control apparatus |
August 30, 2005 |
| A fluid level control apparatus for selectively controlling the movement of liquid flowing out of a flotation cell is described. The fluid level control apparatus is significantly reduced in size in comparison with the flotation cell or cells to which it is connected which enables less |
| 6833077 |
Sequential swinging precoat removal and renewal system, filter so equipped and method |
December 21, 2004 |
| A precoat renewal system for a filter, such as a disc filter. The renewal system includes a plurality of nozzles coupled to spray piping and valving with each nozzle being positioned for spraying an area of one side of a disc. The nozzles and at least a portion of the spray piping is mov |
| 6758978 |
Deep bed thickener/clarifiers with enhanced liquid removal |
July 6, 2004 |
| The enhanced deliquifying of the compacted bed of deep bed thickener/clarifier is disclosed. Such an apparatus comprises a vessel receiving a slurry of liquid and solid particles suspended in the liquid. The vessel defines a free settling zone, a hindered settling zone intermediate, |
| 6461473 |
Supply of washing liquid in a fractionating multi-stage washer |
October 8, 2002 |
| A process for washing pulp including a dilution step, an extraction step and a subsequent displacement step. The process further includes the steps of: diluting the pulp; passing the diluted pulp to the extraction step; developing a first filtrate from the extraction step; passing the pu |
