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7452444 Digester wash extraction by individual screen flow control  
This invention is directed to a method for cooking wood chips in a digester for the separation of wood fibers from their bonded state, the digester having a vertical centerline, a substantially...
7399377 Process 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...
7396435 Method 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...
7384503 Determination 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...
7381295 Pulp 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 ( 12 a 1 ). From the first centrifugal cleaner...
7364638 Process 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...
7334347 Process 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...
7311848 Separation 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...
7294226 Method 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...
7290353 System 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...
7285180 Perforated 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...
7282115 Method 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.
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...
7198695 Method 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...
7169263 Coarse 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...
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...
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...
7147750 Extraction 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...
7141139 Multiple 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 (...
7125472 Slotted screen for digester  
A screen panel for a wood-chip digester, comprises a screen plate having a plurality of slots therein that are curved in the form of an arc. Each slot has a generally parallel-sided middle portion...
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...
7083049 Method 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...
7077930 Method 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...
7063770 Method 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...
7005034 Method 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...
6923889 Printing 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...
6911118 Pulper 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...
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...
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...
6881299 Refiner bleaching with magnesium oxide and hydrogen peroxide  
Methods of bleaching mechanical pulp under alkaline conditions with hydrogen peroxide. The methods include introducing a source of magnesium ions and hydroxyl ions to a refiner. The wood...
6881297 Process 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...
6872316 Recovery of xylose  
The invention relates to a process of producing a xylose solution from a biomass hydrolysate by subjecting the biomass hydrolysate to nanofiltration and recovering as the nanofiltration permeate a...
6846381 Method for controlling quality of pulp  
A method for controlling the quality of pulp. Pulp produced by mechanical defibering of wood is screened to provide at least two fractions, of which the accept that has passed the screening phase...
6843886 Method for handling filled reject flows in a paper or paperboard mill  
A method and device for processing sewage which contains coating paste from a paper or board mill with a device operating on the principle of a double action impact mill. The device includes a...
6827820 Degassing centrifugal apparatus, process for pumping and degassing a fluid and process for producing paper or board  
The invention relates to a degassing centrifugal apparatus such as a pump and to a process for pumping and degassing a fluid. The apparatus has a rotatable hollow rotor connected to a stationary...
6818099 Raw material for printing paper, method to produce it and printing paper  
The object of the present invention is a method for making mechanical pulp, such as thermomechanical or chemi-thermomechanical stock. The mechanical pulp is utilised as a raw material for printing...
6782637 System 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...
6769199 Process for producing dried singulated cellulose pulp fibers using a jet drier and injected steam and the product resulting therefrom  
This invention provides a dried singulated cellulose pulp fiber product as well as an apparatus and a method for forming singulated and dried fibers. In accordance with the process a feed pulp is...
6743332 High temperature peroxide bleaching of mechanical pulps  
A method of making bleached mechanical pulps is disclosed for pulping mills having a primary and a secondary refiner. A first step is to provide cellulosic materials, such as wood chips to refine...
6740198 Method and arrangement for mixing pulp components in the manufacture of paper  
The invention relates to a method of mixing pulp components in the manufacture of paper, in which method the pulp components to be mixed are led to a mixing point along tubes arranged inside each...
6719878 Method for avoiding mechanical damage of pulp  
A method for producing chemical pulp from cellulosic material by means of alkaline cooking, including cooking the material to pulp at cooking temperature in a digester, reducing the temperature at...
6705554 Rotor for a paper stock processing machine, anti-wear element for such a rotor, and paper stock processing apparatus  
Rotor for a paper stock processing machine, an anti-wear element for protecting a leading front surface of a rotor blade, and a paper stock processing apparatus. The rotor includes at least one...
RE38317 Method and apparatus for treating filler-containing material, such as recycled fibers  
Recycled fiber pulp from a vortex cleaning plant (e.g. connected to the short circulation of a paper machine) effects the recovery and return of fillers in the recycled fiber pulp discharged from...
6649068 Filtration of pulp mill liquids  
A fiber mat is formed on a screen cylinder of a pressurized fiber filtering device used to filter particles from a liquid stream. The fiber mat is a fine particle filter to remove small particles...
6613191 Pressurized screen and process for removing contaminants from a fibrous paper suspension containing contaminants  
Pressurized screen to remove contaminants from a contaminant-containing fibrous paper suspension. Pressurized screen includes a housing, a first screen element, essentially axially symmetric and...
6605184 Method and apparatus for treatment of fiber suspension containing minerals, such as coated broke, in paper production  
A method and apparatus treat fiber based material so as to reduce the loss of mineral fractions in the treatment of broke in paper production. Broke is a reusable raw material from a paper machine...
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...
6585854 Device 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...
6524435 Method and composition for dispersing hydrophobic particles in aqueous suspensions  
A method of dispersing hydrophobic particles in aqueous suspensions comprising adding to the suspension an effective amount of an ethylene oxide-propylene oxide block copolymer, wherein the...
6521096 Screen and method for manufacturing a reinforcement element for a screen plate  
A screen, such as a drum screen or a flat screen, for screening or fractionizing pulp suspensions or the like suspensions of the pulp and paper industry. The screen comprises a reinforcement...
Matches 1 - 50 out of 415 1 2 3 4 5 6 7 8 9 >