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| Number | Title | Issue Date |
| 7435314 | Method for the production of a fibrous web In a method for the production of a fibrous web, especially a paper or cardboard web, an automatic ash control system and an automatic retention control system for the reduction or suppression of an interactive build-up of the two controls are linked via a model for... | 10/14/2008 |
| 7387708 | Process for feeding pulp into a blow tank or storage tank A method and apparatus for treating pulp in connection with a blow tank or a storage tank. The pulp is discharged from a batch digester and fed either to the upper or the lower part of a blow tank, depending on the consistency of the pulp being discharged from the d... | 06/17/2008 |
| 7318883 | Equipment and method in a paper or board machine for mixing of fresh stock and of water for dilution of fresh stock The invention concerns an equipment and a method in a paper or board machine for mixing fresh stock (M) with water (V) used for dilution of the fresh stock. At the point of mixing (K) of the dilution water (V) and the fresh stock (M) passed from the pipe (13)... | 01/15/2008 |
| 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 |
| 7229527 | Method 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 |
| 7081594 | Optical paper sorting method device and apparatus An optical paper sorting system uses diffuse reflectance to identify a sheet of paper, conveyed on a conveyor, as either white or groundwood grade. A light source illuminates a sheet of paper and an optical collection system collects and filters the light diffusely ... | 07/25/2006 |
| 7001488 | Method of and apparatus for distribution of paper stock in paper or board making machinery An inlet chamber is connected to a nozzle section by way of a plurality of tubes. Diluting liquid for mixing with paper stock flowing through one or each of said tubes is fed into the tube via annular inlet means. To ensure thorough mixing, channel means leading int... | 02/21/2006 |
| 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 |
| 6993408 | Method for the control of quality in a paper web Paper quality is controlled in the production of a paper web, where paper stock is fed from the headbox of the paper machine onto the wire section, whereby the paper stock is formed into a paper web. The headbox flow rate and consistency are measured from the paper ... | 01/31/2006 |
| 6958109 | Process for feeding pulp into a blow tank or storage tank A method and apparatus for treating pulp being fed into a blow tank or a storage tank. A preferred embodiment is that the pulp is discharged from a batch digester (10) and fed either to the upper or lower part of a blow tank (20), depending on the cons... | 10/25/2005 |
| 6902651 | Tube bank structure, and flow tube producing method The invention provides tube bank structure and a method of manufacturing a flow tube, which can improve the stabilization of the flow of stock in the tube bank of the headbox of a papermaking machine and prevent the development of turbulence and uneven concentration... | 06/07/2005 |
| 6890408 | Headbox for the metered addition of a fluid medium into a suspension stream Headbox for one of a paper and cardboard machine includes at least one material suspension supply running a width of the machine. At least one turbulence producer has at least one conduit through which a material suspension flows. At least one metered addition point... | 05/10/2005 |
| 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 |
| 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 |
| 6752165 | Refiner control method and system A system and method for monitoring and control operation of a rotary disk refiner. The method regulates refiner operation in response to a process variable preferably in relation to a setpoint. The variable can be temperature, pressure, and/or stock consistency, ref... | 06/22/2004 |
| 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 |
| 6517685 | Process arrangement for short circulation The invention concerns the short circulation of a paper or board machine and in particular a simplified process arrangement for the short circulation, which arrangement comprises a metering system (20) for the stock (M) or stocks, pumps (110, 130, 170), a... | 02/11/2003 |
| 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 |
| 6464837 | Headbox and process for the metered addition of a fluid medium into a suspension stream of a headbox Process for a metered addition of a fluid medium into a material suspension stream of a headbox, including feeding the material suspension in a main flow direction through at least one turbulence-producing conduit to a headbox nozzle, the at least one tur... | 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 6207018 | Process for controlling headbox with pulp consistency control Process for controlling and consistency-controlled headbox for a paper machine with a common feed line for a pulp slurry, a plurality of feed line sections into which the common feed line branches, and a system for influencing the composition of the slurr... | 03/27/2001 |
| 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 |
| 6203665 | Process for setting a uniform characteristic cross-direction profile for a paper web Process for setting a uniform characteristic cross-direction profile for a paper web with regard to at least formation, basis weight, and fiber orientation in a paper machine. The paper machine can include a headbox with an adjustable die exit opening and... | 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 |
| 6200423 | 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... | 03/13/2001 |
| 6174413 | Device 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 ... | 01/16/2001 |
| 6149770 | Underwire water weight turbulence sensor A system and method of providing on-line turbulence measurements in a sheetmaking machine and using these measurements to perform on-line adjustments to turbulence-inducing and adjusting elements in the sheetmaking machine to optimize final sheet product ... | 11/21/2000 |
| 6117272 | Device and process for metering auxiliary materials into the flow box of a paper machine A headbox for a paper machine which mixes suspension and additives to achieve a selected basis weight cross direction profile and fiber orientation cross direction profile in paper produced from the machine. The headbox has sections across its width. Each... | 09/12/2000 |
| 6099690 | System and method for sheet measurement and control in papermaking machine Significant improvements in papermaking control can be achieved by employing an array of sensors that are positioned underneath the wire of the machine to measure the conductivity of the aqueous wet stock. The conductivity of the wet stock is directly pro... | 08/08/2000 |
| 6083351 | Dilution control device for a wet end of a paper-making machine A dilution control device interconnects a tapered header with a turbulence generator in a paper-making machine. The turbulence generator includes a substantially planar inlet surface and a plurality of fluid passages, with each fluid passage having an inl... | 07/04/2000 |
| 6080278 | Fast CD and MD control in a sheetmaking machine A system and method of providing fast machine direction (MD) and cross direction (CD) basis weight adjustments using a simultaneous multi-point water weight sensor which provides independent MD and CD measurements is described. The water weight sensor is ... | 06/27/2000 |
