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WO/2000/006302A1 |
A rotary disc refiner includes a pair of spaced apart refiner discs (11, 12) for refining or grinding a material that typically is fibrous material such as wood pulp or the like. Pressurized vapor, typically steam, produced as a result o...
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WO/2000/004232A1 |
A plant which serves to produce a nonwoven web of fibres (20) out of a fibrous material, such as cellulose pulp (6). The plant comprises a hammer mill (1) for defibrating the fibrous material and a forming head (2) for forming a web of f...
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WO/2000/001217A1 |
A transportable floral holder in the nature of a wettable floral foam mass (16) received within a water impervious shell, or sheath (14). The floral foam mass (16) serves as a reservoir as well as a coupling device. The shell (12) not on...
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WO/1999/064664A1 |
A screen cylinder, and a method of making the screen cylinder, take into account the stress concentrations that are formed, particularly at the inner and outer surfaces of the finished screen cylinder, so as to minimize them. The stress ...
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WO/1999/061697A1 |
A screen media (200) for use in screening pulp slurry has a first side (204) and a second side (206). The pulp slurry is fed from the first side of the screen media to the second side of said screen media through a plurality of screening...
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WO/1999/061696A1 |
In the mechanical refining of wood chips to produce wood pulp, wood pulp quality is improved by employing low refining intensity at least in a final refining stage; the refining is carried out in a double disc refiner or a single disc re...
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WO/1999/061699A1 |
The invention relates to a method for flotation of pollutants from an aqueous fibrous material suspension (S), said method being particularly used in the processing of printed or soiled used paper. According to the invention, the fibrous...
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WO/1999/058760A1 |
The invention relates to a device for sorting (1) a suspension containing fibrous material in which a sorting chamber (3) is constructed in a main housing (2) in combination with a rotationally fixed perforated plate (4) having an essent...
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WO/1999/058991A1 |
System and method for producing paper are provided. The system controls formation of wet stock comprising fibers on a moving water permeable wire (7) of a de-watering machine that has means for supplying the amount of pulp from at least ...
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WO/1999/054046A1 |
The invention relates to a refiner disk segment suitable for use in the manufacture of paper or board, the segment comprising a circumferential segment part of a refiner disk surface, the segment part being delineated by an outer edge (1...
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WO/1999/054045A1 |
The object of the invention is a method for processing pulp stock derived from a pulp or paper mill, which pulp stock contains fibres and/or any other components, such as mineral components, in order to disperse the agglomerations in the...
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WO/1999/053137A1 |
In a paper-making machine, a method of determining a volumetric percentage of air in a fiber suspension for delivery to a headbox. The fiber suspension is transported through a fluid conduit (22). A sound transmitter (26A) and a target r...
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WO/1999/052197A1 |
The invention pertains to equipment and methods in which the rotatable drive member of a variable speed motor, such as a switched reluctance motor, carries a rotatable pulp processing element (10). Magnetic bearings (22, 24) levitatingly...
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WO/1999/050019A1 |
Methods of making a wedgewire pressure screen (10) and pressure screens made thereby. Spacers (14) are integrally formed on wedgewires (12) with the wedgewires grouped side by side in a flat arrangement. The wedgewires (12) are then flex...
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WO/1999/046050A1 |
A refiner disc (28, 30) for a fiber refiner (20) having a refiner disc removal device (22) that is integral with and retained by the disc (28, 30) during refiner operation. The removal device (22) includes a biasing element (24) that is ...
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WO/1999/046442A1 |
The present invention relates to a method of reducing the loss of mineral fractions in the treatment of broke in paper production. The invention relates in particular to the treatment of the so-called broke from a paper machine, which is...
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WO/1999/045193A1 |
A screen device for separating fibre 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)...
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WO/1999/045204A1 |
A soft, bright and strong tissue paper product and a process for preparing such a tissue paper product is provided. The tissue paper product is prepared from raw cotton linter fibers and demonstrates unexpected medical benefits or advant...
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WO/1999/042223A1 |
Screen cylinder (10) and method of making same are disclosed wherein the desired inlet (29) and oulet (31) side contours for the screen are formed in respective sides of a precursor metal plate (40) or the like. The contours may comprise...
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WO/1999/040253A1 |
A pressure screen for separating a liquid mixture, preferably a fibre suspension, containing undesired coarse contaminants comprises a screen housing (1) forming a cylindrical screen chamber (2), and an inlet housing (3) directly connect...
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WO/1999/039046A1 |
In a pressure screening device for separating undesired particles from a fibre suspension a cylindrical screen (2) is provided. The screen has an outer side and an inner side and is provided with a plurality of projections (19) on the ou...
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WO/1999/039047A1 |
An apparatus for degassing an aqueous suspension containing pulp fibres, the apparatus comprising an elongated horizontal reservoir (1) and a bypass manifold (2) extending into the reservoir. The bypass manifold (2) is placed inside the ...
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WO/1999/037402A1 |
Replaceable refiner plates (12) used for papermaking and refining of lignocellulosic and other natural and synthetic fibrous materials in the manufacture of paper, paperboard, and fiberboard products. The refiner plates (12) include blad...
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WO/1999/036612A1 |
A process and apparatus for the preparation of improved cellulose pulps is provided, in which defibered pulp is screened for removal of shives, and fibers with low bonding ability are removed in hydrocyclones, and rejects from the hydroc...
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WO/1999/035331A2 |
The invention relates to a solid bowl centrifuge (1) for multiphase mixtures, preferably three-phase mixtures, which is especially meant for fibrous material suspensions used in the paper industry. The solid bowl centrifuge (1) has a hou...
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WO/1999/032712A1 |
A screening device for fiber suspensions, comprising a casing (1) with a screen means (5) and a rotor (6), provided with pulsation wings (9), located at the screen means (5), whereby a screening zone (7) is formed along the screen means ...
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WO/1999/032711A1 |
A screening device for fiber suspensions, comprising a casing (1) with a screen means (5) and a rotor (6) with pulsation wings (9) located at the screen means (5), whereby a screening zone (7) is formed along the screen means (5). An inl...
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WO/1999/028549A1 |
A pressure screen for screening pulp, the pressure screen comprising a housing (1) and a rotor (3) rotatably mounted within the housing, at least two axially successive screen cylinders (7a to 7c), mounted coaxially with the rotor, and f...
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WO/1999/026725A1 |
A pair of co-operating refining elements (10, 11) intended for a refiner for the working of lignocellulosic fiber material in a refining gap between two opposed refining discs rotating relative to each other. The refining elements (10, 1...
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WO/1999/025456A1 |
A control system for the vacuum cutt-off valve of a rotating disc or drum filter is provided. The control system includes an actuator that is connected to the vacuum cut-off valve for adjusting the rotation of the vacuum cut-off valve wi...
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WO/1999/026012A1 |
This invention relates to a pipe attachment, for example to a pulp pump, which attachment consists of a pipe bend (1) and, joined tightly to the latter, a stand pipe (2), wherein the diameter of the stand pipe (2) is greater than that of...
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WO/1999/025918A1 |
Present invention relates to a storage tower for pulp having an outlet in the bottom part of the tower. The problem is to avoid arching and bridging within the pulp in the storage tower, which arching could cause unstable and disrupted d...
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WO/1999/024143A1 |
A papermakers' screen basket (20) for pressure screening of papermaking stock or for pressure filtering is formed with a support core (50) formed with honeycomb shaped cells that extend radially in the direction of flow through the scree...
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WO/1999/024662A1 |
The present invention relates to a method and apparatus for treatment of fiber suspensions in the pulp and paper industry. The invention relates in particular to intensifying the so-called post-screening or secondary screening of bleache...
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WO/1999/024663A1 |
A screen panel intended to constitute a portion of the jacket surface of a screening cylinder for screening fiber material. The screen panel (1) is formed in one piece of a wear-resistant non-weldable material. It is on one side provided...
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WO/1999/023295A1 |
A de-trashing unit has a rotor (20) fabricated from steel blank. The rotor has two swept blades (52) with blunt leading edges (68) and relieved trailing edges (70). The rotor is driven to rotate over a trash screen with holes of between ...
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WO/1999/022064A1 |
The invention relates to a method of making a screen cylinder, in which method screen wires (2) are arranged on the inner surface (4a) of a support hoop at certain intervals and attached by a weld (6) from the outer surface (4b) of the s...
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WO/1999/019070A1 |
A rotary paper pulp refiner system and method includes a rotor (15) having one or more refining elements (16, 17) mounted on a rotating shaft and complimentary non-rotating or stator elements (18, 19) defining with the rotating element a...
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WO/1999/013989A1 |
A refining disc for disc refiners of the kind that includes ribs or ridges (3, 4) which extend over the treatment zones of the discs. The ribs or ridges (3, 4) have the shape of involute arcs with circular evolutes and are of uniform wid...
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WO/1999/013152A1 |
A method for manufacturing a screen plate with screen slots from a thin plate (1), which screen slots (5, 13) are achieved by cutting. The plate is formed by bending to a screen plate of a desired shape. The screen slots (5, 13) are prod...
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WO/1999/011357A1 |
An apparatus for filtering mat forming suspensions, such as fibre pulp suspensions, has rotating annular discs (6) with peripheral chambers (13) arranged to operate as droplegs on the ascending parts of the discs. To speed up the emptyin...
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WO/1999/007477A1 |
The invention concerns a device for reducing the content of solid impurities in a process liquid comprising a hydrocyclone (1) with a tangential inlet (2), a container for separated material (3) and an outlet pipe for purified liquid (4)...
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WO/1999/007485A1 |
Pressure screening apparatus for screening a suspension of paper fiber stock employs a rotor (14, 15, 16) in which a single impulse or foil member (12) is carried or positioned to move along a discrete portion of the screen surface (10)....
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WO/1999/007935A1 |
A method and apparatus for pretreating or conditioning lignocellulose fiber containing feed material in preparation for conversion to pulp. Wood chips are pretreated under conditions of elevated temperature, pressure and humidity and sub...
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WO/1999/002772A1 |
A method for making kraft paper, wherein a sulphate pulp is subjected to HC refining only or to HC refining in combination with LC beating, the LC beating, if applicable, being carried out at a relatively low energy supply, and wherein a...
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WO/1998/059109A1 |
A screening cylinder for screening suspensions of lignocellulosic fiber material. The screening cylinder (10) is formed of rods ( 11), which between themselves form gaps (12) extending along the entire length of the cylinder (10). The ro...
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WO/1998/057723A1 |
The invention relates to a rotationally symmetrical screen for fiber suspensions, comprising an inlet (20) and an outlet (22) for the fiber suspensions, a series of profiled bars (16) which extend perpendicular to the peripheral directio...
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WO/1998/054401A1 |
The invention relates to a device for dehydrating and washing suspensions of fibrous material, comprising two rollers (2, 3) turning in opposite directions, a material feeding element (4, 5) and a material discharge element (6). Said dev...
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WO/1998/054402A1 |
The invention realises a reactor (1) for liquids purification comprising: a tank (2) containing the liquid to be purified; a plurality of upper injectors (3) suitable for introducing in the tank (2) said liquid to be purified with an aer...
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WO/1998/054403A1 |
The invention realises a baffle (40) for a reactor (1) for liquids purification, said reactor comprising: a tank (2) containing the liquid to be purified; a plurality of injectors (3, 20) suitable for introducing in the tank (2) said liq...
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