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| Number | Title | Issue Date |
| 8123909 | Apparatus for treating papermaking feedstock A papermaking raw material processor capable of reforming pulp in papermaking a process using cavitation includes a first pump 5 jets jet liquid and second pump 6 jets suspension containing; e.g., pulp fibers into a processing unit inside which cavitat... | 02/28/2012 |
| 7431800 | Device and method for on-line control of the fibre direction of a fibre web A device and a method for on-line control of the fibre direction of a fire web (8), being manufactured from stock delivered from a headbox (3) through a discharge opening (11) defined by movable lips (9, 10), while using a fibre direction... | 10/07/2008 |
| 7399380 | Jet velocity vector profile measurement and control In a papermaking system having a headbox to dispense a jet of liquid and paper forming fibers, an improvement comprising at least one sensor arrangement for simultaneously or sequentially measuring in at least one location the jet velocity or jet flow correlation of... | 07/15/2008 |
| 7318882 | Method and apparatus for monitoring of the dry line in a Foudrinier paper machine and for control based thereupon In order to observe the dry line formed on the surface of wood fibre pulp on the moving wire in a Fourdrinier paper machine, its—atrea of appearance is scanned at a low angle with a thin beam cluster (A1, B1) which, being generated by a laser radiati... | 01/15/2008 |
| 7311803 | Distribution of a flowing medium Methods for uniformly distributing a flowing medium to a surface such as that of a rotary liquid permeable roll are disclosed where the flowing medium is distributed by a number of distribution units, the method including distributing the flowing medium to each of t... | 12/25/2007 |
| 7279072 | Method and apparatus for adjusting operation of wire section Adjusting the operation of a wire section, in which the development of the consistency of stock on the wire section (2) is determined and the effect of the consistency determined above on the formation and/or porosity of a paper web (3) is determined. ... | 10/09/2007 |
| 7229526 | Method and apparatus for the feeding of fibers A system for feeding fibres from a fibre separation step at a first pressure to a drying step at a second, lower pressure, the system comprising a sluice feeder (3) provided between the fibre separation step and the drying step. At least an outlet (14)... | 06/12/2007 |
| 7135092 | Arrangement for controlling the edge of pulp mass in a web former and a method for controlling the edge of pulp mass The invention relates to an arrangement for controlling the edge of pulp mass in a web former, the web former comprising a space formed by two wires or the like, into which space the pulp mass is fed. The wires or the like are supported on a chamber units, which eac... | 11/14/2006 |
| 7067040 | Headbox of paper machine or such A headbox (10) of a paper machine or such includes a bypass manifold (J1), from which the pulp is conducted by way of pipes (11a1.1, 11a1.2 . . . 11a2.1, 11a | 06/27/2006 |
| 6998021 | Arrangement for paper machine, and blow box In a paper machine which comprises process elements and a measuring beam, the measuring beam is arranged at least at one paper machine process element so that a measuring device for measuring quality properties of a paper web is arrangeable in the measuring beam. Th... | 02/14/2006 |
| 6902650 | Method of making a stratified paper The present invention provides a method making stratified paper by redistributing the pulp suspension inside the headbox nozzle using acoustic radiation waves. Acoustic radiation forces fractionate fibers based on fiber radius. The acoustic radiation waves separate ... | 06/07/2005 |
| 6884320 | Method and apparatus for producing and testing a fiber bed A method for producing and testing a fiber bed, includes a housing, a main inlet passage and a main outlet passage, a cavity in the housing in fluid connection with the inlet and outlet passages, a body rotatably arranged in the cavity, the body being arranged with ... | 04/26/2005 |
| 6875312 | Method for fluidisation of pulp flow in the headbox of a paper machine or such and control equipment used in the fluidisation A method for fluidisation of a pulp flow in the headbox of a paper machine or such. The characteristics of the pulp flow are affected in the headbox's fluidiser (14) in one step only, whereby the height (h1) of the step is at least equal to the ave... | 04/05/2005 |
| 6855230 | Method and regulation arrangement for controlling dewatering profile of a former In a paper or board machine, the cross-direction profile of a flow channel defined between a first dewatering element (52, 53) situated inside a first forming wire loop (50) and a second dewatering element (64, 65) situated inside a second formi... | 02/15/2005 |
| 6808601 | Method for mixing dilution liquid into a stock flow in a paper or board machine to control basis weight using coarse and fine controls A method and an apparatus for mixing dilution liquid into a stock flow in a paper or board machine. Dilution is carried out in at least two stages using in the first dilution stage (I) valves (V1, V2, V3 . . . ) fitted with a larger ... | 10/26/2004 |
| 6805772 | Method and apparatus for manufacturing a fibrous material web Process and apparatus for manufacturing a fibrous material web. The apparatus includes an automatic formation regulator, and the process includes on-line measuring of formation of the fibrous material web, utilizing the on-line measured formation as a controlled var... | 10/19/2004 |
| 6770171 | Method and system for controlling headbox in a paper/board machine A paper/board machine headbox (10) has a stock inlet header (J), a tube bank (11), a turbulence generator (13) and a slice opening (14) which is provided with a profile bar. The headbox (10) is provided with cross direction measuri... | 08/03/2004 |
| 6733629 | Method of controlling the operation of an approach system of a paper machine or the like web formation apparatus The present invention relates to a method and apparatus for controlling the operation of an approach system of a paper machine or the like web formation apparatus. Especially preferably the method of controlling the operation of an approach system according to the i... | 05/11/2004 |
| 6712937 | Method of operating a machine for the manufacture and/or refinement of material webs System and method of operating a machine for manufacturing and/or refining a material web wherein the machine includes at least one machine section. The method includes arranging a plurality of measurement zones in series along a process direction and detecting data... | 03/30/2004 |
| 6640152 | Modeling and control of sheet weight and moisture for paper machine transition Headbox transient responses for sheet weight and moisture are modeled as a combination of two sets of time constants and dead time delays. One set represents a shorter delay with faster response dynamics, the fast mode weight and moisture responses, and t... | 10/28/2003 |
| 6551459 | Regulation system for the short circulation and headbox of a paper machine or equivalent A headbox (10) has a stock inlet header, a tube bank, a tubulence generator and a slice channel. Measurement targets (PA, PB, PC, P, PE) are provided with means for making measurements of the fiber mobility of t... | 04/22/2003 |
| 6544387 | Multi-layer headbox for a paper/board machine A multi-layer headbox for a paper or board machine including stock inlet headers each providing one stock and coupled to a tube bank which in turn is coupled to a respective intermediate chamber. The stock flows from the intermediate chambers into a turbu... | 04/08/2003 |
| 6524441 | Process for detecting and correcting a fiber orientation cross direction profile change Process and a device for detecting a change in the fiber orientation cross-direction profile of a paper or cardboard web in the manufacturing process on a paper or cardboard machine. It is recognized that a change in the fiber orientation cross-direction ... | 02/25/2003 |
| 6491792 | Apparatus for controlling a headbox in a paper machine Method and apparatus for controlling the mixing proportions of feed streams being supplied to a headbox, using devices for sampling two or more of the feed streams upstream of the headbox and devices for measuring concentration of constituents in or other... | 12/10/2002 |
| 6464833 | Method of controlling basis weight profile using multi-layer consistency dilution The stock approach piping to a multi-layered headbox can be modified to include a dilution water header that independently supplies dilution water, such as whitewater, to multiple CD segments or zones of the tube bank which supply stock to each layer. The... | 10/15/2002 |
| 6432275 | Headbox of a paper/board machine by whose means the basis weight of the web can be regulated The invention concerns a headbox for a paper/board machine by whose means the basis weight of the web can be regulated. The headbox comprises a stock inlet header (Jl), which becomes narrower towards its end. Tubes (11a1, 11a2 | 08/13/2002 |
| 6402893 | Control equipment for the headbox tip lath in a paper machine or such and method of tip lath control Control equipment for the headbox tip lath of a paper machine includes first actuators (12a1, 12a2 . . . ), which are located at different points along the headbox (100) width and connect functionally with a bendable intermediate par... | 06/11/2002 |
| 6368462 | Headbox for a paper or board making machine The invention relates to a headbox (10) for a paper/boardmaking machine. The headbox (10) including a stock flow header (11) and, following the stock flow header, a piping system such as an inlet pipe manifold, and/or a turbulence generator (14) and a tap... | 04/09/2002 |
| 6368461 | Device to control or regulate the basis weight of a paper or cardboard web Paper or cardboard machine and method for regulating a basis weight of a paper or cardboard web in the manufacturing process. The paper or cardboard machine includes at least one headbox that extends across a machine width. The at least one headbox is ada... | 04/09/2002 |
| 6355142 | Method of controlling headbox jet velocity for foamed furnishes Controlling the velocity of a jet of foamed furnish leaving the slice of a pressurized headbox of a paper or a tissue making machine by measuring the density and pressure of a flow of foamed furnish provided by a pump to estimate an atmospheric pressure a... | 03/12/2002 |
| 6328851 | Method and equipment for controlling properties of paper The invention relates to a method and equipment for controlling properties of paper, in which method the effect of the flow of retention agent (Fra) and the stock flow (Fts) on the basis weight of the paper (BW) is modelled. The fulf... | 12/11/2001 |
| 6322666 | Regulation system and method in a paper machine A feedback-connected on-line regulation system for a headbox of a paper or board machine. The headbox includes a flow duct for stock suspension or separate flow ducts placed one above the other, each flow duct extending from an inlet header of the headbox... | 11/27/2001 |
| 6319362 | Method and equipment for controlling properties of paper The invention relates to a method and equipment for controlling properties of paper, which method comprises modelling the effect of the flow of retention agent (Fra) both on the amount of filler in the white water and on the paper ash content (... | 11/20/2001 |
| 6299731 | Process and headbox system for improving consistency cross-direction profile of fiber web Process and apparatus for improving a consistency cross-direction profile of a fiber web in the wet section. The process includes distributing a fiber suspension across a machine width from a headbox to one of on a wire and between two wires, adjusting a ... | 10/09/2001 |
| 6290816 | Paper machine with closed loop control system A paper machine for making a fiber web includes an approach flow system with a plurality of control modules. Each control module controls one of a plurality of adjustable input parameters. A wet end receives a fiber suspension from the approach flow syste... | 09/18/2001 |
| 6284100 | Method and apparatus for controlling a headbox in a paper machine Method and apparatus for controlling the mixing proportions of feed streams being supplied to a headbox, using devices for sampling two or more of the feed streams upstream of the headbox and devices for measuring concentration of constituents in or other... | 09/04/2001 |
| 6264792 | Method for producing calendered paper A method and apparatus for producing calendered paper by an on-line manufacturing system comprising at least a paper machine and a multi-nip calender. The method comprises following steps: removing water from a formed paper web by pressing, drying the pre... | 07/24/2001 |
| 6221213 | Process and device for measuring slice gap spacing at a paper machine headbox The invention refers to a process for measuring spacing at a paper machine headbox. It is primarily characterized by constant magnetic fields being generated at the headbox slice gap area, the intensity of these fields being measured and these measurement... | 04/24/2001 |
| 6203667 | Method for regulating basis weight of paper or board in a paper or board machine Method for regulating the basis weight of paper or board in a paper or board machine in which the machine stock is comprised of a number of component stocks and the basis weight of the dry paper or board is measured, preferably by on-line basis-weight mea... | 03/20/2001 |
| 6200421 | Apparatus and process for feeding stock to a papermachine The invention relates to an apparatus and a process for feeding papermaking stock to a papermachine. The apparatus comprises a mixing vessel (12) for receiving and mixing stock components and a pipe (40) for feeding the resulting mixed stock to said paper... | 03/13/2001 |
