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| Number | Title | Issue Date |
| 8011515 | Two stage pulp screening device with two stationary cylindrical screens A device including a hollow cylindrical body, first and second stationary coaxial annular screening screens disposed within the body, and a rotor within the body and positioned between the screens to conduct the slurry through the first screen and then through the s... | 09/06/2011 |
| 7721895 | Screening device for wet screening of paper fiber suspensions A screening device for the wet screening of a paper fiber suspension comprising at least one screen plate having a plurality of screen openings, a support structure being detachably attachable to the screen plate, a rotor movable adjacent the screen plate and an out... | 05/25/2010 |
| 7413086 | Inline sifter An inline sifter including a gas-powder mixture receiving module which receives a mixture of a gas and powdery material from an inlet, a sieving module which communicates with a supply chamber of the gas-powder mixture receiving module, a rotating mechanism which is... | 08/19/2008 |
| 7380671 | Process for size classifying ammonium sulfate crystals which are present in a suspension The invention relates to a process for size classifying ammonium sulfate crystals using a screen, said process comprising feeding a feed suspension to the screen, said feed suspension comprising said ammonium sulfate crystals in an ammonium sulfate solution, size cl... | 06/03/2008 |
| 7279073 | Apparatus for liquid-based fiber separation An apparatus for treating fibrous material is disclosed. The apparatus may include a fiber separator, a de-liquefier, a dry-to-wet blender and a flash dryer. The fiber separator may be a liquid-based fiber separator. The de-liquefier is for removing liquid from the ... | 10/09/2007 |
| 7168570 | Screen cylinder with performance boosting configuration A screen cylinder (125) used for screening cellulosic fibrous material pulp in the pulp and paper industry incorporates first (66) and second (67) downstream surfaces (16) having contoured slopes that form a funnel entrance of the grooves... | 01/30/2007 |
| 7163106 | Strainer for cleaning fibrous suspensions A strainer for fibrous suspensions, having a container, a filtering basket inside the container and a rotor inside the filtering basket coupled to motorization means suited to set it rotating. In the container there are a drain chamber of the rejected suspension, a ... | 01/16/2007 |
| 7163604 | Production of fiber suspension from waste paper A fiber suspension is produced from waste paper by first filling a pulper with a batch of the waste paper. The pulper is operated to partly defibrate the batch of waste paper substantially without disintegrating coarse imputities into finer impurities. The partly de... | 01/16/2007 |
| 7121411 | Screen apparatus It is an object of the present invention to provide a screen apparatus having a function of dilute water which is suitable for a centripetal type screen which rotates inside the screen. A screen apparatus A comprises a tank 1 for receiving paper raw materials... | 10/17/2006 |
| 7097740 | Method and screen for screening at least two pulp mixtures The invention relates to a method and a screen for screening two or more pulp mixtures with different roughness. The screen comprises a first screen cylinder and a second screen cylinder. A coarse first pulp mixture is fed into the inlet end of the first screen cyli... | 08/29/2006 |
| 7097044 | Dry separation of contaminants from polyester materials A method for separating polyester materials from contaminants is disclosed suitable for, for example, a polyester recycling system. The method is a dry separation method and includes rapidly spinning a mixture of polyester and contaminants within a cleaning chamber.... | 08/29/2006 |
| 6942104 | Rotor with multiple foils for screening apparatus for papermaking pulp 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. T... | 09/13/2005 |
| 6923329 | Screen apparatus A screen apparatus includes a tank, a first cylidrical screen disposed inside the tank to form a first chamber, and a second cylidrical screen disposed outside the first cylindrical screen. The second cylindrical screen defines a second′ chamber facing the first c... | 08/02/2005 |
| RE38738 | Cylindrical screen, particularly for paper pulp Cylindrical screen, particularly for paper pulp, of the type comprising at least one filtering element (10) positioned between two flanges (1, 2) by means of a number of bars (3). The filtering element is composed by wires (10) placed sid... | 05/31/2005 |
| 6883669 | Multi-element airfoil for pulp screens A the operation of pulp screening apparatus may be improved by employing a multi element foil having a leading foil section and a trailing foil section spaced from and trailing leading section so that adjacent surfaces of the sections one formed by a portion of a pr... | 04/26/2005 |
| 6726022 | Screening device and rotor for use in a screening device Apparatus for the screening of fiber suspensions is disclosed including a housing, a reject outlet and an accept outlet, a screen located within the housing, a rotor including pulsation wings mounted therein, a reject chamber in the housing for collecting a reject p... | 04/27/2004 |
| 6679384 | Method and means for paper pulp filtering Process for the filtration of paper pulp with a device that comprises a rotor and a stator; one of the two, filter (1), has perforations of slot or hole types, and the other, the backwashing element, includes means that are intended to generate pressure p... | 01/20/2004 |
| 6669025 | Screen A screen for cleaning a pulp suspension including an additional screen basket in the infeed area for pre-screening.... | 12/30/2003 |
| 6631809 | Screen for cleaning a pulp suspension A screen for cleaning a pulp suspension includes a stationary installation in the infeed area between the infeed branch and the free end of the rotor.... | 10/14/2003 |
| 6588599 | Screen for pulp processing A screen, for screening material used in the production of paper, board and the like, having a screen basket and a rotor supporting several blades which can be moved along the wall of the screen basket when the rotor rotates. The blades having a convex cu... | 07/08/2003 |
| 6585116 | Screening apparatus for fiber suspension A screening apparatus is used for screening acceptable and rejectable material from a pressurized fiber suspension. The screening apparatus includes a housing, a rotor, a screen basket and at least one sensor. The screen basket is positioned generally con... | 07/01/2003 |
| 6571957 | Screening apparatus for fiber suspension A screening apparatus for screening acceptable and rejectable material from a pressurized fiber suspension includes a housing and a rotor within the housing. The rotor has a top end. A screen basket is positioned generally concentrically around the rotor.... | 06/03/2003 |
| 6550620 | Pulp screening device The present invention is a pulp screening device which is capable of screening a large quantity of pulp with low power, by preventing clogging of a screen cylinder. The device is provided with one or a plurality of vanes which revolve within an agitation ... | 04/22/2003 |
| 6530481 | Pressure screen with scrap separation A pressure screen for separating a liquid mixture is disclosed, comprising a screen housing forming a cylindrical screen chamber, and an inlet housing directly connected to the screen housing and forming a cylindrical inlet chamber, the diameter of which ... | 03/11/2003 |
| 6499603 | Screen for cleaning pulp suspensions A screen for cleaning a pulp suspension including a cylindrical screen basket and a double-conical accept chamber which widens in the flow direction of the pulp suspension.... | 12/31/2002 |
| 6409023 | Process and device for fractioning a suspension containing paper fibers Process and device for fractioning a suspension containing paper fibers, in which the suspension is separated into at least two fractions by a wire with a scraper. The process includes moving the scraper in a substantially parallel relation to the wire so... | 06/25/2002 |
| 6360897 | Screen device comprising two screen chambers for separating fiber suspensions A screen device for separating fiber suspensions comprises a screen (40) defining a central chamber (36), and a rotor (15) in the central chamber having a first (21) and a second (27) rotor portion, respectively, provided with first (43) and second (41) p... | 03/26/2002 |
| 6338412 | Cylindrical screen, particularly for paper pulp Cylindrical screen, particularly for paper pulp, of the type comprising at least one filtering element (10) positioned between two flanges (1, 2) by means of a number of bars (3). The filtering element is composed by wires (10) placed side by side and hel... | 01/15/2002 |
| 6311850 | Pressure screening apparatus for screening a paper stock suspension and screen clearer for such a screening apparatus A pressure screening apparatus for screening a stock suspension and screen clearer for a pressure screening apparatus. The pressure screening apparatus includes an inflow chamber, a suspension inflow connected to one end of the inflow chamber, a reject ou... | 11/06/2001 |
| 6254729 | Pulper with extraction plate assembly having removable inserts and method of manufacturing same A pulper for pulping a fiber suspension includes a vessel, an extraction plate assembly and a rotor. The extraction plate assembly is disposed within the vessel and includes a metal plate with a plurality of holes extending therethrough. A plurality of me... | 07/03/2001 |
| 6241102 | Screening device Apparatus is disclosed for screening fiber suspensions including a housing, an annular screen disposed within the housing, a rotor disposed within the annular screen for rotating relative to the annular screen, pulsation wings disposed between the outer s... | 06/05/2001 |
| 6206204 | Screen apparatus A screen apparatus of the invention is provided with a tank for receiving a papermaking material; a screen situated inside the tank for dividing the tank into a first chamber and a second chamber to separate a foreign substance from the papermaking materi... | 03/27/2001 |
| 6193073 | Paper stock screening apparatus and method Pressure screening apparatus for screening a suspension of paper fiber stock employs a rotor in which a single impulse or foil member is carried or positioned to move along a discrete portion of the screen surface. This arrangement improves efficiency of ... | 02/27/2001 |
| 6171448 | Apparatus for screening waste paper pulp A casing has a pulp slurry inlet, a reject outlet and an accept stock outlet and accommodates a rotor. The rotor has a hollow cylinder with scraper blades at its outer periphery. A screen plate is disposed outside of the scraper blades to provide between ... | 01/09/2001 |
| 6170580 | Method and apparatus for collecting, defluidizing and disposing of oil and gas well drill cuttings A method and system for collecting, defluidizing and disposing of oil and gas well drill cuttings is disclosed including a system consisting primarily of a separation tank assembly, a vacuum pump assembly, a solids collection box and a liquids collection ... | 01/09/2001 |
| 6155427 | Zoned pressure screen Pressure screening apparatus for screening a suspension of papermaking stock employing an enclosing housing and a cylindrical screen, with a drum type rotor, has the screen divided or formed with axially spaced annular screening zones and a corresponding ... | 12/05/2000 |
| 6131742 | Device for separating contaminants from fibre pulp suspensions A separation device for separating contaminants from fiber pulp suspensions, preferably produced from waste paper, comprises a cylindrical screen number (4) and a rotor (7) arranged therein. An annular inlet passage (14) for incoming suspension surrounds ... | 10/17/2000 |
| 6119867 | Screen cylinder The present invention relates to a screen cylinder for screening fiber suspensions of the wood processing industry. The screen cylinder comprises a rotationally symmetric screen surface located on the side of the pulp to be screened, and support rings sup... | 09/19/2000 |
| 6117273 | Mechanical strainer for fibrous suspensions The invention realizes an improved mechanical strainer for fibrous suspensions including: a rotor; a filtering basket substantially coaxial externally to said rotor; an interspace defined between the side surfaces of said rotor and of said filtering baske... | 09/12/2000 |
| 6029821 | Screening device A screening device is described which is adapted in particular for fiber suspensions when paper is pulped. Along the outer circumference of a rotor body, there are disposed vanes which are oriented towards a screen wall. The vane is supported by a support... | 02/29/2000 |
