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Class 162/55 - With classifying, separating or screening of pulp (solids from solids)


Subclass of Class 162 - Paper making and fiber liberation
Definition: Processes combined with a step of separating solid components
No. of patents: 314
Last issue date: 09/27/2011


1                
NumberTitleIssue Date
8025761Method for degassing and supplying a fibrous suspension to a headbox or a filter device and degassing device
Method for supplying fibrous suspension to at least one headbox that includes degassing a diluting liquid via rotation of a rotor of a degassing device to apply centrifugal forces to the diluting liquid, guiding the degassed diluting liquid out of the degassing devi...
09/27/2011
7951263Method and apparatus for treating pulp
A method of dividing a suspension, especially a fiber suspension into an accept fraction and a fraction containing impurity particles in a centrifugal cleaning plant having at least two stages. The suspension is fed to a preceding stage, wherefrom a heavier fraction...
05/31/2011
7807020Method for degassing and supplying a fibrous suspension to a headbox or a filter device and degassing device
The invention relates to feeding a fibrous suspension to a headbox of a paper or cardboard machine, or to a filter device. The method includes: diluting a high-consistency suspension with a liquid to form a fibrous suspension; degassing the fibrous suspension via a ...
10/05/2010
7651588Dewatering and thickening belt having improved guide performance and manufacturing method thereof
A dewatering and thickening belt having an endless fabric woven with synthetic resin filaments, a bending-resistant element and a guide protrusion, wherein the guide protrusion is fusion-bonded to a bending-resistant portion to which the bending-resistant element ha...
01/26/2010
7560008Extraction with compaction and springback considerations
A vessel is constructed with (preferably substantially stationary) screen surfaces which minimize compaction of comminuted cellulosic fibrous material, and allow springback of the material, as it flows downwardly. A slurry of wood chips, sawdust, or pulp is passed d...
07/14/2009
7399377Process for singulating cellulose fibers from a wet pulp sheet
A hammermill for singulating cellulosic fibers from a wet pulp sheet includes a cylindrical housing, a feed slot with a breaker bar positioned therein and a rotor mounted for rotation in the housing. Feed rolls are provided to feed a sheet of pulp into the feed slot...
07/15/2008
7396435Method for conveying, mixing, and leveling dewatered pulp prior to drying
Methods for conveying, mixing, leveling, and flaking dewatered pulp to produce pulp flakes suitable to be used in a dryer. Methods for producing a consistent flow rate of pulp, and, for producing uniform pulp flakes in terms of pulp flake size and pulp flake moistur...
07/08/2008
7384503Determination of contaminant particles in an aqueous pulp
A method and system for determining trace oversize contaminant particles in a paper-making pulp employs a screen assembly having a screen housing with a screen mounted therein, and ports for introduction of aqueous pulp and rinsing and flushing fluids, and for withd...
06/10/2008
7381295Pulp fractionation using centrifugal cleaners and power screens with multi-layer headbox and deaeration tank
Virgin stock is conducted to a paper or board machine and further to a centrifugal cleaner installation (12) into its first centrifugal cleaner step (12a1). From the first centrifugal cleaner step (12a1) the a...
06/03/2008
7364638Process for the hot dispersing of a paper fiber stock
The present invention is directed to a process for the hot dispersing of a paper fiber stock that includes providing an aqueous paper fiber stock and pressing the aqueous fiber stock in a thickening device. In this manner, water is at least partially removed from th...
04/29/2008
7334347Process for producing dried, singulated fibers using steam and heated air
Dried, singulated cellulose pulp fiber is produced by introducing wet pulp steam and air into a jet dryer. The air is heated to a temperature of 250° C. to 600° C. Steam is injected at a nozzle pressure of from 344 KPa (50 psig) to 4,137 KPa (600 psig). The pulp i...
02/26/2008
7323038Separation of gases and solids using a cyclone
Cyclone design comprising an inlet device having an inlet height (Hi) and an inlet width (Wi), a gas outlet pipe having a pipe diameter (Di) and a pipe penetration (P), a barrel having an upper barrel diameter (Db) and a barrel length (Lb), said barrel comprising a ...
01/29/2008
7311848Separation apparatus
The present invention relates to a method of monitoring a liquid fluid mixture and a system carrying out the method. The invention also relates to the use of the system for monitoring liquid fluid mixtures. ...
12/25/2007
7294226Method of removing high density stickies from secondary papermaking fibers
A hybrid method for processing papermaking fibers to remove high density stickies typically includes utilizing a multistage array of forward cleaners coupled with a flotation cell which increases overall efficiency of the system. In a preferred embodiment, a first r...
11/13/2007
7290353System for making dried singulated crosslinked cellulose pulp fibers
This invention provides a dried singulated crosslinked cellulose pulp fiber product as well as an apparatus and a method for forming singulated, crosslinked, and dried fibers. In accordance with the process, a feed pulp containing a crosslinker is delivered to a jet...
11/06/2007
7285180Perforated deck made out of a plurality of segments
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...
10/23/2007
7282114Method for processing pulp
The object of the invention is a method and a device for dispersing pulp, especially pulp containing waste paper, in which method ground pulp mass is fed between the blade surfaces (4) of a dispersing device that are brought in a rotating movement in relation to one...
10/16/2007
7282115Method for mitigating the interference caused by high-molecular weight-by-products in pulping processes
Separation of dissolved and colloidal high molecular weight organic by-products from liquors or filtrates in a cellulosic pulping process to improve the overall efficiency of the process. ...
10/16/2007
7279073Apparatus 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
7229527Method for the controlled thickening of low consistency fiber suspensions
The present invention relates to the thickening of pulp suspensions. A low consistency pulp suspension is fed to a pre-thickener (10) through an inlet conduit (18). A layer of thickened pulp, formed on a filter surface (22), is pushed along the ...
06/12/2007
7198695Method for separating hemicelluloses from a biomass containing hemicelluloses and biomass and hemicelluloses obtained by said method
The invention relates to a method for separating hemicelluloses from a biomass containing hemicelluloses. The method includes the steps of: a) extracting the hemicelluloses from the biomass containing hemicelluloses by treating them with a complex compound in an aqu...
04/03/2007
7169263Coarse dirt collector for removing coarse material from a pulper and corresponding method
The invention relates to a coarse dirt collector (7) for removing coarse material from a pulper (1). The coarse dirt collector (7) comprises a support arm (8) with a collecting basket (9). The collecting basket (9) consists ...
01/30/2007
7163604Production 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
7163106Strainer 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
7147750Extraction with compaction and springback considerations
A vessel is constructed with (preferably substantially stationary) screen surfaces which minimize compaction of comminuted cellulosic fibrous material, and allow springback of the material, as it flows downwardly. A slurry of wood chips, sawdust, or pulp is passed d...
12/12/2006
7141139Multiple cleaning stages with various dilution points and accepts recirculated through a common pipe
In a process and an arrangement for directing a papermaking pulp towards a regulated outlet (9), accept from successive cleaning stages (6, 14, 20) is totally or partly led towards the outlet (9) while excess accept is led in the opposite direct...
11/28/2006
7097740Method 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
7083049Method of regulating sorting systems and a sorting system suitable for carrying out this method
A method of regulating sorting systems, in particular multi-stage sorting systems, in paper production and a sorting system working in accordance with the method are described, in which the fiber suspension supplied in each case to a sorting stage is separated into ...
08/01/2006
7077930Method for controlling screening by measuring flow amount consistency of the pulp
The invention relates to a method of controlling quality of pulp. Pulp formed in mechanical defibering of wood is screened into at least two fractions, the accept that has passed the screening phase being forwarded for further use and the reject that did not pass th...
07/18/2006
7063770Method of removing high density stickies from secondary papermaking fibers
A hybrid method for processing papermaking fibers to remove high density stickies typically includes utilizing a multistage array of forward cleaners coupled with a flotation cell which increases overall efficiency of the system. In a preferred embodiment, a first r...
06/20/2006
7048260Turbocharged aerator
The present invention is an aerator for inducing air flow below the surface of a liquid. The aerator includes a motor having a drive shaft. A propeller is operably connected to the drive shaft of the motor and a blower is operably connected to the motor. The aerator...
05/23/2006
7005034Method in connection with the production of mechanical pulp
A method in connection with the production of mechanical pulp from a cellulose containing material wherein the material is processed in at least one refining step to produce pulp. According to the invention, the pulp is fractionated (4), after a first refinin...
02/28/2006
6930277Fastener element molding
A method of forming a mold having cavities for molding loop-engageable, hook-shaped fastener elements, includes: supporting a first plate having an outer surface that defines a plane; manipulating a material-cutting beam of a laser along a predetermined curved profi...
08/16/2005
6925929Screw press
A screw press provided with a rear excess fluid outlet is described herein. The rear excess fluid outlet includes a circular screen provided at a longitudinal end of the screw press body, near a material inlet. Scraper blade assemblies are provided to prevent the sc...
08/09/2005
6923889Printing paper
The invention relates to coated printing paper which contains mechanical pulp and whose opacity is at least 89%, brightness at least 65% and surface roughness not more than 4.5 μm. The printing paper contains mechanical pulp at least 90 weight-% of the total fiber ...
08/02/2005
6920983Device for separating solids from liquids by means of flotation
The invention relates to a device for separating solids from liquids by means of flotation, particularly for separating impurities and ink particles from fibre suspensions, with several injectors 10, which are provided inside a flotation cell 1. It is ...
07/26/2005
6911118Pulper for producing paper pulp from waste paper
A pulper for producing paper pulp from waste paper containing undesired scrap particles includes a container (1) forming a chamber (4) defined by a bottom wall (5) and a cylindrical circumferential wall (6). A paper tearing member (7
06/28/2005
RE38738Cylindrical 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
6883669Multi-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
6881297Process for aerating dispersions
A device and process for aerating dispersions, particularly for flotation of pulp suspensions, in a de-inking process where the pulp suspension containing dirt particles is sprayed into a tank together with air. The air is injected at a minimum of two successive poi...
04/19/2005
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