Assignee: Valmet Fibertech Aktiebolag

Location: SE
No. of patents: 22

Browse patents
Browse applications

Number	Title	Issue Date
6732520	Hydraulic system for a press Hydraulic systems are disclosed for operating a press comprising a press ram, a press cylinder including a primary side for activating the press ram and press ram return cylinders for returning the press ram, and at least one flow amplifier comprising a piston inclu...	05/11/2004
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
6458242	Ozone bleaching process using oxalic acid addition Processes are disclosed for bleaching pulp with ozone in an environmentally friendly bleaching plant. The processes include removing a first filtrate from the pulp, bleaching the treated pulp with ozone, washing the bleached pulp with a washing liquid to ...	10/01/2002
6416214	Mixing device Apparatus for mixing steam or bleaching agents with a pulp suspension is disclosed, including a chamber for receiving the flow of pulp suspension from an input line, the chamber including a jacket surrounding the flow of pulp suspension through the chambe...	07/09/2002
6394727	Method of securing bale wrappers to bales and a fastener for carrying out the method Methods are disclosed for securing a wrapper about a bale which is intended to be subsequently treated comprising inserting a fastener pin through the wrapper into the bale, the fastener pin being adapted to remain in the bale during subsequent treatment ...	05/28/2002
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
6319357	Method for two-stage oxygen bleaching and delignification of chemical pulp Methods for oxygen delignification of a pulp are disclosed, including initially delignifying the pulp at a delignification temperature of less than 90° C., adding oxygen to the pulp so that the oxygen is present during the initial delignification step, a...	11/20/2001
6299084	Feeding device for fibrous material Feeding elements are disclosed for use in connection with refiners for lignocellulosic fibrous material including a stationary refiner, a rotary refiner mounted for rotation in juxtaposition with the stationary refiner thereby forming a refining gap there...	10/09/2001
6290067	Screening apparatus with dilution liquid supply means Screening apparatus is disclosed for separating fiber suspensions comprising a housing having an inlet for the fiber suspension, a stationary tubular screen dividing the interior of the housing into a central chamber for receiving the fiber suspension fro...	09/18/2001
6283741	Device for spreading and distributing particles on a material web Apparatus is disclosed for spreading and distributing particles such as glue-coated wood fibers onto a moving web including rotatable axles disposed transverse to the direction of movement of the moving web with each axle including a number of distributor...	09/04/2001
6250053	Method and device for applying wrapping sheets on pulp bales A method and apparatus for wrapping bales of pulp are disclosed, the method comprising transporting the bales between upper and lower conveyors, applying a first wrapping sheet to the lower surface of the bale, applying a second wrapping sheet to the uppe...	06/26/2001
6227471	Feeding element for fibrous material A feeding element is disclosed for use in connection with a refiner for lignocellulosic fibrous material including a stationary refiner, a rotary refiner mounted for rotation in juxtaposition with the stationary refiner thereby forming a refining gap ther...	05/08/2001
6221207	Oxygen delignification of pulp in two stages with low pressure steam heating between stages Methods for oxygen delignification of chemical pulps are disclosed including contacting the chemical pulp with oxygen first in an upstream reactor vessel and then in a downstream reactor vessel. The upstream reactor vessel is maintained at pressures of gr...	04/24/2001
6221206	Method for oxygen delignification of a digested pulp Methods for oxygen delignification of a pulp are disclosed, including initially delignifying the pulp at a delignification temperature of less than 90° C., adding oxygen to the pulp so that the oxygen is present during the initial delignification step, a...	04/24/2001
6216877	Screen panel and method of its manufacture Screen panels are disclosed for the screening of fibrous material. The screen panels are one-piece screen panels which can then be incorporated into a cylindrical screen jacket without the use of welding. The screen panels include a plurality of apertures...	04/17/2001
6213632	Apparatus for treating an aqueous working medium by shearing in annular treatment slots of varying sizes Apparatus for treating an aqueous medium with a treatment fluid including a housing forming a treatment chamber, a rotatable rotor arranged in the treatment chamber, and including a number of rotor rings carried by the rotatable rotor and coaxially arrang...	04/10/2001
6206309	Method and device for treatment of fibrous material Methods and apparatus are disclosed for refining lignocellulosic material between a pair of relatively rotary refining elements forming an annular outer refining zone and a central feed zone. The method includes feeding the lignocellulosic material to the...	03/27/2001
6139606	Method and apparatus for pumping a medium Methods and apparatus are disclosed for degassing gas-containing fluid media in a container with the apparatus including a centrifugal pump for pumping the gas-containing fluid medium from the container, an ejector including a suction side, an ejector inl...	10/31/2000
6136239	Method of manufacturing lignocellulosic board Continuous methods for manufacturing finished board are disclosed which include disintegrating lignocellulose material prior to drying, gluing, and forming into mats, and in which the pressing of the mat into a board includes a first step in which the mat...	10/24/2000
6123884	Method of manufacturing lignocellulosic board Methods for the continuous manufacture of board from lignocellulose-containing material are disclosed including disintegrating the lignocellulose material into particles or fibers, drying, coating with glue, forming the glued board into a mat, heating the...	09/26/2000
6123121	Distributing device for paper pulp Apparatus is disclosed for distributing a flow of pulp uniformly into a container including an inlet for the pulp flow into one end of the container, a cylindrical wall laterally defining a distribution chamber for the container, a planar wall within the ...	09/26/2000
6113104	Sealing device Apparatus for sealing rotary shafts supported by bearings within an airtight casing and extending into a housing maintained at an overpressure is disclosed including a mechanical shaft seal for sealing the shaft as it passes into the housing, a seal mount...	09/05/2000

PatentStorm

Quotables

PatentStorm News

Assignee: Valmet Fibertech Aktiebolag