With Measuring, Inspecting And/or Testing Patents (Class 162/198)
  • Patent number: 7144477
    Abstract: A suction roll assembly includes a suction roll having a perforated shell, and a suction box positioned within the suction roll. The suction box includes a holder, a seal strip adjacent the shell and carried by the holder, at least one target carried by the seal strip, and at least one sensor positioned in association with at least one target. Each sensor provides an output signal indicative of a position of at least one corresponding target.
    Type: Grant
    Filed: December 15, 2003
    Date of Patent: December 5, 2006
    Assignee: Voith Paper Patent GmbH
    Inventor: James Gleason, Jr.
  • Patent number: 7144478
    Abstract: The invention provides a method of preventing contamination of a dryer of a paper machine so that predetermined effects of contamination prevention over the long term can always be ensured while maintaining satisfactory drying efficiency. With the method of preventing contamination of the surface of the drum dryer used in a paper machine, a predetermined amount of a surface treatment agent P is continuously supplied to the surface of the drum dryer C1 in rotation, facing a paper strip W, while the paper strip is being fed by the paper machine in operation.
    Type: Grant
    Filed: September 14, 1999
    Date of Patent: December 5, 2006
    Assignee: Maintech Co., Ltd.
    Inventor: Kunio Sekiya
  • Patent number: 7141141
    Abstract: The invention relates to an apparatus for the on-line determination of paper web moisture content and/or temperature on the dryer section of a papermaking machine. The apparatus is designed to form, in combination with a doctor means and/or a packet ventilating tube, such a compact structure wherein the apparatus operates underneath such means or in a close proximity thereto. The invention also relates to a method for control of paper web moisture content and temperature on the basis of measurements performed on the dryer section of a papermaking machine.
    Type: Grant
    Filed: November 2, 2000
    Date of Patent: November 28, 2006
    Assignee: EV Group Oy
    Inventors: Pekka Koskinen, Esa Virtanen, Ilpo Pitkaniemi, Jari Ristola
  • Patent number: 7138036
    Abstract: A monitoring apparatus is provided which can ensure the prevention of a paper break even in a poor installation environment. A light source (9) illuminates light (9a) on a lateral edge (1a) of wet paper (1) and a camera (5) captures light (9b) reflected therefrom. The camera (5) is a micro camera and completely covered by a camera box (10). The camera box (10) has an observation window (10a) which is made of a transparent member, at the lens side (5a) of the camera (5). The outer surface of the observation window (10a) is coated and an air curtain (12a) that flows from above to below prevents staining caused by mist. The air curtain (12a) is formed in such a manner that air that is continuously supplied inside a cover (11) flows along the outer surface of the observation window (10a) from an opening portion (11a).
    Type: Grant
    Filed: May 29, 2002
    Date of Patent: November 21, 2006
    Assignees: Mitsubishi Heavy Industries, Ltd., OJI Paper Co., Ltd.
    Inventors: Hiroshi Yamashita, Setsuo Suzuki, Hiroshi Iwata, Toshihiro Tokudome, Masayuki Ogawa, Isao Kodaka, Masatoshi Kaku, Hisao Usogoe
  • Patent number: 7128808
    Abstract: A method and an apparatus for identifying mapping of a paper machine by means of a mapping test. The invention comprises forming a mapping model which takes the linear and non-linear shrinkage of a paper web into account. The mapping test result is analyzed to form a non-linear shrinkage profile and a linear mapping error from it. The linear error and the non-linear shrinkage profile thus obtained are used in the mapping model.
    Type: Grant
    Filed: May 23, 2002
    Date of Patent: October 31, 2006
    Assignee: Metso Automation Oy
    Inventors: Tapio Metsälä, John Shakespeare
  • Patent number: 7130040
    Abstract: Methods for the continuous determination of the properties of a flow of wood fibers for use in the production of fiberboard are disclosed including determining reference value characteristics for calibration samples of the fibers, determining predetermined relationships between those reference value characteristics and measured spectral values for the fibers utilizing multivariant statistical regression methods, measuring reflectance spectral values for the fibers illuminated by light, and determining the fiber characteristics relating to the properties from the measured spectral values utilizing the predetermined relationship.
    Type: Grant
    Filed: March 1, 2001
    Date of Patent: October 31, 2006
    Assignee: Valmet Fibertech AB
    Inventors: Thore Lindgren, Johan Carlsson, Ulrika Backlund
  • Patent number: 7115188
    Abstract: Process and apparatus for monitoring dewatering in a wet end section of a web production machine. The process includes measuring water flowing into the wet end section, measuring water flowing out of the wet end section, measuring conductivity of the wet web entering the wet end section, measuring conductivity of the water flowing into wet end section, measuring conductivity of water flowing out of the wet end section, and determining a water balance from the measured quantities, which is indicative of dewatering in the wet end. The apparatus is arranged to perform the process.
    Type: Grant
    Filed: January 18, 2002
    Date of Patent: October 3, 2006
    Assignee: Voith Paper Patent GmbH
    Inventor: Andrew Lilburn
  • Patent number: 7108766
    Abstract: A doctor unit in a paper machine includes a blade carrier having a blade holder fitted to the blade carrier. A doctor blade is mountable in the blade holder to doctor a roll or similar moving surface. The blade holder and/or doctor blade include one or more sensors installed inside the construction or on its surface. The sensors are arranged to measure the wear of and/or stress in the blade holder and/or doctor blade.
    Type: Grant
    Filed: September 12, 2000
    Date of Patent: September 19, 2006
    Assignee: Metso Paper, Inc.
    Inventors: Ilkka Eskelinen, Ilkka Rata, Harri Ruotsalainen, Jukka Samppala, Heikki Toivanen, Juhani Vestola
  • Patent number: 7101461
    Abstract: A system and process for measuring paper formation characteristics in real time is disclosed. The system comprises apparatus used in a papermaking process, and includes a rotating forming fabric having an upper and lower surface. A paper slurry is deposited upon the upper surface of the moving forming fabric to prepare a wet paper web. The wet paper web typically moves at a high rate of speed as it rides along upon the surface of the forming fabric. Light is transmitted from a light source to the surface of the wet paper web, and then reflected from the surface of the wet paper web to a camera. An image is formed corresponding to the pattern of the reflected light, and in some instances data generated from the reflected light may be compared to other values to provide a feedback loop to adjust the parameters of the papermaking process in real time.
    Type: Grant
    Filed: January 29, 2001
    Date of Patent: September 5, 2006
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Peter J. Allen, Scott H. Delzer, Lindsay M. Brewster
  • Patent number: 7067039
    Abstract: A variable representing runnability of a paper web to be manufactured with a paper machine or processed with a finishing apparatus is measured and the speed difference between operational groups of the paper machine and/or the finishing apparatus is adjusted on the basis of the measurement of said variable such that the moisture profile of the paper web is measured substantially along the entire width of the paper web, the minimum and maximum values for moisture are defined on the basis of the moisture profile, a drawing window describing the allowable tension to be directed to the paper web is defined, the lower and upper limits of the drawing window being defined on the basis of the minimum and maximum values for moisture, and the speed difference between the operational groups is adjusted so that the paper web tension is within the range defined by the drawing window.
    Type: Grant
    Filed: January 8, 2003
    Date of Patent: June 27, 2006
    Assignee: Metso Automation OY
    Inventors: Jari Almi, Pekka Höyssä
  • Patent number: 7056419
    Abstract: Carbon dioxide may be used to adjust the electrical properties of papermaking compositions. Such papermaking compositions may contain a colloid phase, an aqueous phase, and optionally, pulp fibers. Examples of electrical properties whose values may be adjusted include zeta potential, electrical charge demand, conductivity, and streaming potential. The carbon dioxide may be introduced at many different points in a papermaking process, including calcium carbonate slurry feeds, pulp fiber slurries, diluted pulp fibers slurries, broke, and whitewater. When a value or range of values based upon an electrical property is predetermined, such as an optimal value or range, introduction of carbon dioxide may be used to adjust the value such that it is closer to the predetermined value.
    Type: Grant
    Filed: September 6, 2003
    Date of Patent: June 6, 2006
    Assignee: American Air Liquide, Inc.
    Inventors: V. S. Meenakshi Sundaram, Daniel Duarte, Steven Fisher
  • Patent number: 7048827
    Abstract: Sheetmaking processes such as papermaking making systems employ water weight sensors underneath the moving water permeable wire that supports the wet stock (pulp slurry). A dynamically compensated calibration equation that equates the water weight plus fiber weight plus wire weight (total weight) to the resistance measured by the water weight sensor is developed for controlling the continuous process. Dynamic compensation accounts for changing papermaking machine conditions or states that affect the intrinsic conductivity of the wet stock being measured. The amount of correction to apply is determined by the conductance measured by a reference sensor.
    Type: Grant
    Filed: May 26, 2004
    Date of Patent: May 23, 2006
    Assignee: Honeywell International Inc.
    Inventors: John David Watson, Claud Hagart Alexander
  • Patent number: 7045037
    Abstract: Process for cleaning at least one roll of a calender. The process includes guiding a web over a surface of the at least one roll of the calender to be cleaned, and producing a relative speed difference between the surface of the least one roll and a section of the web lying against the surface of the a least one roll. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.
    Type: Grant
    Filed: August 8, 2003
    Date of Patent: May 16, 2006
    Assignee: Voith Paper Patent GmbH
    Inventor: Hans-Rolf Conrad
  • Patent number: 7040225
    Abstract: Undesirable bending vibrations in at least one rotating component are reduced. An undesirable vibration is counteracted by the use of at least one actuator. A required sequence of signals to be applied to the actuator and/or an intensity level of those signals is based on an angle of rotation position of the rotating component. The rotating component is then subjected to a force based on the position of the angle of rotation.
    Type: Grant
    Filed: August 24, 2005
    Date of Patent: May 9, 2006
    Assignee: Koenig & Bauer Aktiengesellschaft
    Inventor: Claus August Bolza-Schünemann
  • Patent number: 7018512
    Abstract: A paper processing roll for use in a calender of a paper-making machine which during operation can be exposed to increased temperatures is provided with a heat-treated surface which is produced by hot-grinding or hot-balancing or both.
    Type: Grant
    Filed: December 5, 2001
    Date of Patent: March 28, 2006
    Assignee: Walzen Irle GmbH
    Inventors: Jaxa von Schweinichen, Klaus-Peter Schramm, Wolfgang Wiertz, Ludwig Hellenthal
  • Patent number: 7017483
    Abstract: Undesirable bending vibrations in at least one rotating component are reduced. An undesirable vibration is counteracted by the use of at least one actuator. A required sequence of signals to be applied to the actuator and/or an intensity level of those signals is based on an angle of rotation position of the rotating component. The rotating component is then subjected to a force based on the position of the angle of rotation.
    Type: Grant
    Filed: October 19, 2002
    Date of Patent: March 28, 2006
    Assignee: Koenig & Bauer Aktiengesellschaft
    Inventor: Claus August Bolza-Schünemann
  • Patent number: 7001485
    Abstract: An arrangement for measuring properties of a moving paper web. The arrangement comprises measuring means for measuring paper properties, in connection with which a plane-like support surface is arranged. The plane-like support surface supports the paper web and extends substantially over the whole width of the paper web in the cross-direction relative to the direction of travel of the paper web. An opening arrangement formed by at least one opening is arranged on the support surface for measuring properties of the paper web.
    Type: Grant
    Filed: January 14, 2002
    Date of Patent: February 21, 2006
    Assignee: Metso Automation Oy
    Inventors: Pekka Koivukunnas, Helena Leppäkoski, Matti Kukkurainen, Sakari Kauppinen
  • Patent number: 6998021
    Abstract: 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. The paper machine process element is e.g. a blow box, which is arrangeable in a dryer unit of the paper machine between drying cylinders to blow air via at least one blow air channel provided in the blow box to guide the moving paper web and/or to assist drying.
    Type: Grant
    Filed: March 22, 2002
    Date of Patent: February 14, 2006
    Assignee: Metso Automation Oy
    Inventors: Markku Mäntylä, Matti Kukkurainen, Jari Koivu
  • Patent number: 6993408
    Abstract: 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 stock fed into the headbox, and the water quantities removed on the wire section during the formation of the paper web are measured on the wire section. In the method, a filler distribution model is established, into which data on the wire section geometry, measured headbox flow rate and consistency and on the water quantities removed on the wire section are entered, and the model is used for establishing an estimate of the filler distribution, and the running values of the paper machine are adjusted on the basis of the estimated filler distribution.
    Type: Grant
    Filed: May 1, 2003
    Date of Patent: January 31, 2006
    Assignee: Metso Paper, Inc.
    Inventor: Ari Puurtinen
  • Patent number: 6971261
    Abstract: A method of determining at least one property of moving clothing of a machine for producing and/or treating a material web, in particular a paper or board web, which includes the following steps: arranging a nozzle opposite the surface of the moving clothing; producing a jet acting on the clothing by way of the nozzle contacting the moving clothing; measuring a variable representative of the flow through the nozzle; measuring a variable representative of the pressure of the jet at the nozzle outlet; determining the speed of the jet at the nozzle outlet from the nozzle flow and the free surface of the jet medium at the point of contact with the clothing; and determining the speed of the jet at the entry into the clothing from the speed of the jet at the nozzle outlet and the speed of the clothing.
    Type: Grant
    Filed: September 17, 2004
    Date of Patent: December 6, 2005
    Assignee: Voith Paper Patent GmbH
    Inventors: Thomas Ischdonat, Ralf Pfifferling, Rudolf Muench, Michael Sollinger
  • Patent number: 6953516
    Abstract: The energy efficiency of a throughdrying papermaking process is improved by recycling exhaust gas from one or more throughdryers prior to throughdrying to profile the consistency of the web.
    Type: Grant
    Filed: January 16, 2004
    Date of Patent: October 11, 2005
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Michael Alan Hermans, Frank Stephen Hada
  • Patent number: 6929716
    Abstract: A method for the manufacture or treatment of a material web, in particular of a paper or a cardboard web, while using a respective machine, in particular a paper machine, including the step of measuring the hardness and/or the compactness of at least one clothing, in particular of at least one felt, fabric, belt and/or the like, of the machine.
    Type: Grant
    Filed: February 27, 2003
    Date of Patent: August 16, 2005
    Assignee: Voith Paper Patent GmbH
    Inventors: Rudolf Müch, Raymond P. Shead
  • Patent number: 6929715
    Abstract: A method and a device for measuring concentrations especially in a pulp suspension, from which a sample has been taken. The sample is collected in a measuring vessel, in which a piston is guided upwards and downwards in order to press the sample from each direction through a measuring sensor collected at the side of the measuring vessel via communicating tubes connected in an upper and a lower position to the measurement vessel, whereby the sample is stirred totally to eliminate flocculation in the same. Measurement of the concentration of the sample is made either during the upwards and downwards movement of the piston in the measuring vessel and first occurs when the speed of the sample through the measuring sensor is constant and the sample has been homogenized after at least some movement upwards and downwards of the piston.
    Type: Grant
    Filed: January 24, 2003
    Date of Patent: August 16, 2005
    Assignee: BTG Källe Inventing AB
    Inventors: Gerdt Fladda, Jonny Weng
  • Patent number: 6911117
    Abstract: A method and apparatus for damping vibration in a paper machine. The apparatus having a dynamic damper which includes a weight suspended by a spring. The spring constant of the spring is changed by means of a control device in order to tune the natural frequency of the dynamic damper. The dynamic damper is tuned to a frequency that is substantially equal to a multiple of the rotational frequency of the roll in the paper machine that is being damped.
    Type: Grant
    Filed: April 22, 1998
    Date of Patent: June 28, 2005
    Assignee: Metso Paper, Inc.
    Inventors: Jouko Karhunen, Arto Puranen, Jorma Köliö, Esa Lehtovirta, Erkki Hietamäki
  • Patent number: 6905573
    Abstract: The surface of a web is monitored by a fault detection system (20), a machine condition monitoring system, a quality measurement system, a web moisture measurement and/or a web temperature measurement and the soiled part of the surface of the roll is detected and localized by means of a soiling monitoring apparatus (31, 35; 60). A control system (41) controls a cleaning device (40) to remove the detected soiling. As a web (W) travels in a paper or board production or finishing process or in finishing machinery the web and/or the surface of the roll is monitored and after a detected deviation the surface thereof is momentarily spread with a liquid while machinery is running at the same time as the web (W) travels over said roll surface.
    Type: Grant
    Filed: September 6, 2001
    Date of Patent: June 14, 2005
    Assignee: Metso Paper, Inc.
    Inventors: Tapio Mäenpää , Timo Vuorimies, Pekka Koivukunnas, Aaron Mannio, Olli-Pekka Väkevä , Kari Hasanen, Tarja Hanska, Pekka Linnonmaa, Markku Kyytsönen, Helena Leppäkoski, Markus Laitila, Markku Kojo, Toni Seppänen, Marjaana Toppila
  • Patent number: 6902650
    Abstract: 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 the fibers by pushing the coarse and longer fibers to the inner area while fines and smaller fibers remain in the outer area. This has a similar effect of multi-layer stratification headbox, and provides paper with a smoother surface.
    Type: Grant
    Filed: November 3, 2003
    Date of Patent: June 7, 2005
    Assignee: International Paper Company
    Inventors: Chang Shin Park, Hanjian Xu
  • Patent number: 6893539
    Abstract: Machine and process for the production of a tissue web that includes a drying cylinder and a press shoe arrangement. The press shoe arrangement and the drying cylinder are arranged to form a nip with lateral edge areas. A plurality of contact pressing elements are arranged to exert pressing pressures across the nip, a measuring device is structured and arranged to measure pressing pressures resulting in at least the lateral edge areas, and at least one of a control and regulating device is structured and arranged to locally adjust the pressing pressures in the lateral edge areas by adjusting pressing pressures exerted by contact pressing elements assigned to the lateral edge areas. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.
    Type: Grant
    Filed: March 3, 2003
    Date of Patent: May 17, 2005
    Assignee: Voith Paper Patent GmbH
    Inventor: Thomas Thoroe Scherb
  • Patent number: 6884320
    Abstract: 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 a through-going passage having first and a second opening, a screen arranged in the through-going passage, and elements for measuring properties of the fiber bed. The method includes positioning the body so that the first opening is connected to the main inlet and the second opening is connected to the main outlet, creating a first passage, leading a fiber suspension through the first passage in order to produce a fiber bed on the screen, measuring the properties of the bed, rotating the body such that the second opening is connected to the main inlet and the first opening is connected to the main outlet and creating a flow through the first passage for removing the fiber bed from the screen through the outlet.
    Type: Grant
    Filed: March 25, 2002
    Date of Patent: April 26, 2005
    Assignee: Fibertracker AB
    Inventors: Hakan Karlsson, Per-Ivar Fransson
  • Patent number: 6878237
    Abstract: Machine and process for operating machine having at least one roll and an opposing surface arranged to form at least one nip. The machine includes at least one roll and an opposing surface arranged to form at least one nip. A sound measuring device is arranged to conduct sound measurements in at least one of an area of the at least one roll and an area of the at least one nip to monitor vibrations in the at least one roll and/or in the at least one nip. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.
    Type: Grant
    Filed: March 26, 2003
    Date of Patent: April 12, 2005
    Assignee: Voith Paper Patent GmbH
    Inventor: Eva Scheideler
  • Patent number: 6860033
    Abstract: Tension variations in the paper web on a paper machine are caused by successive draws and moisture fluctuations. Good strength properties require optimization of the draws. In addition, the tension variation induced by moisture must be minimized. The analysis of local modulus and the strain components can be used for determining optimal locations for profiling actuators in order to achieve good tension profile. Longitudinal strain components of the web, i.e. reversible elastic strain, permanent plastic strain and frozen-in strain relievable with water are continuously measured and determined and the variation of said longitudinal components is minimized by correcting the moisture content of the paper web in a dryer section of the paper machine and/or by optimizing the draws between dryer groups in the dryer section.
    Type: Grant
    Filed: October 1, 2001
    Date of Patent: March 1, 2005
    Assignee: Metso Paper, Inc.
    Inventors: Hannu Lätti, Antti Heikkinen, Heikki Kettunen
  • Patent number: 6855230
    Abstract: 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 forming wire loop (60) is measured, and the location and/or the position of the blade element (64, 65) is adjusted based on the measurement result in order to regulate the thickness profile of a stock flow. The measurement can be by passing an alternating current of low frequency to a current rail situated in the second dewatering element (64, 65) and by measuring the strength of the magnetic field created by it by at least two measuring devices which have been placed either in the first dewatering element (53) or, when the first dewatering element is a forming roll (52), in the same dewatering element (64) as the current rail.
    Type: Grant
    Filed: June 8, 2001
    Date of Patent: February 15, 2005
    Assignee: Metso Paper, Inc.
    Inventors: Kari I. Salminen, Pasi Virtanen, Jukka Sorsa
  • Publication number: 20040261965
    Abstract: A method and system for controlling one or more properties of a sheet of material to be manufactured on a sheet-making machine is disclosed. Actuators to control the sheet properties are arrayed in the cross-direction of the machine. Properties data about one or more properties of the sheet of material are measured and both the magnitude of an actuator control action and the cross-direction shape of an actuator control action are controlled to minimize the variation of the measured properties data from a desired target for each of the one or more properties.
    Type: Application
    Filed: June 25, 2003
    Publication date: December 30, 2004
    Inventor: Gary K. Burma
  • Patent number: 6835283
    Abstract: The invention relates to a process for measuring and controlling the nip pressure in the press of a paper machine, particularly in a shoe press, across and/or along the web running direction. It is largely characterized by the hydraulic, static pressure being measured at reference points through measurement boreholes in the press nip and adjusted continuously. In addition, the invention relates to a device for carrying out the process.
    Type: Grant
    Filed: December 16, 2002
    Date of Patent: December 28, 2004
    Assignee: Andritz AG
    Inventors: Harald Weigant, Harald Michels, Simone Koidl
  • Publication number: 20040256069
    Abstract: A method for controlling the CO2 addition in a wet end process utilizing CO2 addition is disclosed. The method includes combining a papermaking composition and CO2 to create a CO2-enriched papermaking composition, measuring or estimating at least one electrical property of either the papermaking composition or of the CO2-enriched papermaking composition, and controlling the rate of addition of CO2 to maintain the at least one electrical property within a pre-selected range of values.
    Type: Application
    Filed: June 10, 2004
    Publication date: December 23, 2004
    Inventors: Victor M. Saucedo, Daniel Duarte
  • Publication number: 20040260421
    Abstract: A process is modeled by a dynamic model, handling time dependent relations between manipulated variables of different process sections (10A-D) and measured process output variables. Suggested input trajectories for manipulated variables for a subsequent time period are obtained by optimizing an objective function over a prediction time period, under constraints imposed by the dynamic process model and/or preferably a production plan for the same period. The objective function comprises relations involving predictions of controlled process output variables as a function of time using the process model, based on the present measurements, preferably by a state estimation procedure. By the use of a prediction horizon, also planned future operational changes can be prepared for, reducing any induced fluctuations. In pulp and paper processes, process output variables associated with chemical additives can be used, adapting the optimization to handle chemical additives aspects.
    Type: Application
    Filed: August 13, 2004
    Publication date: December 23, 2004
    Inventors: Ulf Persson, Tomas Lindberg, Lars Ledung, Per-Olof Sahlin, Lennart Kallen
  • Patent number: 6830659
    Abstract: An apparatus for measuring wear of a doctor blade includes measuring members placed around the doctor blade for measuring at least one dimension of the doctor blade. The measuring members are arranged to permit longitudinal movement of the doctor blade between the doctor blade and the measuring members. In addition, measurement sensors are connected to the measuring members to obtain a continuous measurement result when the doctor blade or the apparatus is moved. The invention also relates to a method in the measurement of wear of a doctor blade and in controlling a paper machine.
    Type: Grant
    Filed: November 5, 2002
    Date of Patent: December 14, 2004
    Assignee: Metso Paper, Inc.
    Inventor: Tero Sovijärvi
  • Publication number: 20040238140
    Abstract: The invention relates to a method in a paper or pulp process to control the chemical state of the pulp and circulation water system. In the process one or more raw-material components (PROCESS WATER, TMP, PULP, REJECT) diluted in liquid, possible fillers, and one or more additives are mixed to form stock. In the method, the electrochemical state of at least one raw-material component (PROCESS WATER, TMP, PULP, REJECT) and/or the stock is regulated, without the regulation substantially affecting the pH values of the raw-material components (PROCESS WATER, TMP, PULP, REJECT) and/or of the stock.
    Type: Application
    Filed: February 20, 2004
    Publication date: December 2, 2004
    Inventor: Sakari Laitinen-Vellonen
  • Patent number: 6821389
    Abstract: The present invention is a machine for manufacturing a fibrous web from a fibrous suspension, with a sheet forming area that exhibits at least one suction box, which includes a main box with at least one suction box cover that is formed from at least two drainage elements that run laterally to the machine's running direction, border a suction slit, and each has one main body and at least one ceramic. The present invention is identified by the fact that at least; one drainage element and/or one format slide exhibit at least one removable edge piece in which is integrated at least one temperature sensor in order to measure the temperature in the ceramic and/or the temperature at an adhesive point between the ceramic and the associated main body and/or the temperature in the main body. The present invention is furthermore a process and a system for monitoring a drainage element.
    Type: Grant
    Filed: January 20, 2004
    Date of Patent: November 23, 2004
    Assignee: Voith Paper Patent GmbH
    Inventors: Günter Halmschlager, Herbert Haunlieb, Christoph Haase, Stefan Lehner-Dittenberger, Rüdiger Keinberger, Helmut Fitzke, Herbert Boden
  • Publication number: 20040221978
    Abstract: A web making machine is monitored to identify at least one cross-machine direction (CD) actuator that is developing local mapping problems. The identified CD actuator and a segment of surrounding actuators are probed to determine a performance curve for the actuator. The center of an insensitivity region of the performance curve is selected as an optimal mapping alignment setting for the identified actuator with the setting for the actuator being updated. Global smoothing may also be accomplished by probing a global smoothness factor to generate a corresponding performance curve that is then similarly used to select an optimal value for the smoothness factor.
    Type: Application
    Filed: May 9, 2003
    Publication date: November 11, 2004
    Inventors: Peter Quang Tran, Kevin Dale Starr, Timothy Andrew Mast
  • Patent number: 6808601
    Abstract: 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 mutual spacing at different points of width across a headbox and passing the dilution water through the valves to desired points of width of the headbox according to the requirement of control of the basis weight of paper or board. In the second dilution stage (II), dilution water is passed into connection with the stock flow coming from the first dilution stage (I), said dilution water being controlled by means of valves (V1′, V2′ . . . ), which valves (V1′, V2′ . . . ) have been fitted with a denser spacing than the valves (V1, V2, V3 . . . ) of the first dilution stage (I).
    Type: Grant
    Filed: March 1, 2002
    Date of Patent: October 26, 2004
    Assignee: Metso Paper, Inc.
    Inventor: Juhana Lumiala
  • Patent number: 6805772
    Abstract: 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 variable, and maintaining the formation at a preselectable target level via the automatic formation regulator.
    Type: Grant
    Filed: April 10, 2002
    Date of Patent: October 19, 2004
    Assignee: Voith Paper Patent GmbH
    Inventor: Michael Schwarz
  • Patent number: 6797120
    Abstract: A method for producing a pulp molded article is disclosed. The method comprises the steps of forming and drying a pulp molded precursor (15). The drying step includes a first step and a second step. In the first step, the precursor (15) is set in a cavity of a heating mold, and is hot-pressed. The cavity has a configuration in conformity to the contour of the pulp molded article to be produced. In the second step, the hot-pressed precursor (15) is taken out from the heating mold and is heat-dried in a drying furnace.
    Type: Grant
    Filed: April 10, 2003
    Date of Patent: September 28, 2004
    Assignee: Kao Corporation
    Inventor: Akira Nonomura
  • Publication number: 20040177940
    Abstract: A method for target application of a Performance Enhancing Material to a creping cylinder in order to improve a tissue making operation is described and claimed. The method involves dividing the creping cylinder into Zones and then applying the desired Performance Enhancing Material on a Zone by Zone basis such that each Zone has the optimal Performance Enhancing Material present. Furthermore, a method to ascertain the amount and pattern of application of the Performance Enhancing Material used on the creping cylinder is described and claimed. This method involves adding an inert fluorescent tracer to said Performance Enhancing Material and then to use a fluorometer to look for the tracer on the creping cylinder, and/or on the creped tissue product and/or in the water removed from the felt.
    Type: Application
    Filed: March 22, 2004
    Publication date: September 16, 2004
    Inventors: Sammy L. Archer, Gary S. Furman
  • Patent number: 6792388
    Abstract: A method for monitoring and analyzing a paper manufacturing process, is disclosed in which a large number of quantities (xi, t) are measured from the process, the measured quantities (xi, t) are entered as an input vector ({overscore (X)}, t) into a neural network, which, in response to the input vector, produces an output vector ({overscore (Y)}, t) as a continuous quantity, at least one fingerprint consistent with a good process situation in regard of runnability, i.e. an optimal output vector ({overscore (Y)}o, t) is determined and stored in memory, the stored fingerprints and fingerprints or output vectors obtained in a normal process situation are compared substantially in real time, and based on the comparison, a difference to be presented in a graphic form to the user is determined.
    Type: Grant
    Filed: October 2, 2002
    Date of Patent: September 14, 2004
    Assignee: Liqum Oy
    Inventor: Sakari Laitinen-Vellonen
  • Patent number: 6787574
    Abstract: Alkenyl succinic anhydride (ASA) size emulsions are prepared using a grafted cationic acrylamide starch co-polymer as an emulsification agent. The ASA size emulsions of the present invention exhibit significantly greater stability compared to presently available ASA size emulsions. The grafted starch co-polymer also is a more efficient emulsification agent for ASA size, permitting the use of less emulsification agent, thereby saving cost.
    Type: Grant
    Filed: October 24, 2000
    Date of Patent: September 7, 2004
    Assignee: Georgia-Pacific Resins, Inc.
    Inventors: Charles E. Farley, George Anderson, Karla D. Favors
  • Publication number: 20040163786
    Abstract: The present invention is a machine for manufacturing a fibrous web from a fibrous suspension, with a sheet forming area that exhibits at least one suction box, which includes a main box with at least one suction box cover that is formed from at least two drainage elements that run laterally to the machine's running direction, border a suction slit, and each has one main body and at least one ceramic. The present invention is identified by the fact that at least one drainage element and/or one format slide exhibit at least one removable edge piece in which is integrated at least one temperature sensor in order to measure the temperature in the ceramic and/or the temperature at an adhesive point between the ceramic and the associated main body and/or the temperature in the main body. The present invention is furthermore a process and a system for monitoring a drainage element.
    Type: Application
    Filed: January 20, 2004
    Publication date: August 26, 2004
    Applicant: Voith paper patent GmbH.
    Inventors: Gunter Halmschlager, Herbert Haunlieb, Christoph Haase, Stefan Lehner-Dittenberger, Rudiger Keinberger, Helmut Fitzke, Herbert Boden
  • Patent number: 6780284
    Abstract: A method and an apparatus for controlling a moisture profile of a paper web, in which the moisture profile of the paper web prior to drying is measured. The measurement is carried out with a measuring device, which measures a cross-direction profile of the web substantially simultaneously. On the basis of the measurement, the moisture profile of the paper web is controlled prior to drying the paper web.
    Type: Grant
    Filed: June 18, 2003
    Date of Patent: August 24, 2004
    Assignee: Metso Automation Oy
    Inventors: Jari Almi, Raimo Korhonen, Matti Kukkurainen, Markku Mäntylä
  • Publication number: 20040159416
    Abstract: A vibration-minimizing suspension mechanism for a press roll is provided. The press roll and an opposing roll each having a rotational axis and cooperate to form a press nip for imparting a linear load on a web passing therethrough. The linear load is oriented through the rotational axes of the press and opposing rolls. The suspension mechanism comprises a suspension arm having opposed ends and a medially-disposed pivot, wherein the rotational axis of the press roll is rotatably engaged with one of the opposed ends. The suspension arm is pivotably and adjustably mounted at the pivot to allow the pivot to be adjusted in substantially parallel relation to the linear load. The adjustable pivot thereby allowing a mounting line, defined by the pivot and the rotational axis of the press roll, to be maintained in substantially perpendicular orientation to the linear load to thereby minimize vibration in the press roll.
    Type: Application
    Filed: February 23, 2004
    Publication date: August 19, 2004
    Applicant: Metso Paper Karlstad AB
    Inventor: Tord Gustavsson
  • Publication number: 20040154775
    Abstract: 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 the fibers by pushing the coarse and longer fibers to the inner area while fines and smaller fibers remain in the outer area. This has a similar effect of multi-layer stratification headbox, and provides paper with a smoother surface.
    Type: Application
    Filed: November 3, 2003
    Publication date: August 12, 2004
    Inventors: Chang Shin Park, Hanjian Xu
  • Patent number: 6773551
    Abstract: Method and apparatus for determining characteristics of a running material web, the apparatus including at least one measuring device. The at least one measuring device is movable and has at least two degrees of freedom of movement. Each of the at least two degrees of freedom of movement is at least one of a rotary movement and a linear movement. The at least one measuring device is adapted to detect, at a plurality of measurement locations, data relating to at least one measured parameter. The at least one measuring device detects data about at least one of the following measured parameters: measured parameters which relate to a characteristic value of air in a region of the material web; measured parameters which relate to the material web; and other measured parameters. The method includes detecting, at a plurality of measurement locations and using the at least one measuring device, data relating to at least one measured parameter.
    Type: Grant
    Filed: December 5, 2001
    Date of Patent: August 10, 2004
    Assignee: Voith Paper Patent GmbH
    Inventors: Markus Oechsle, Frank Wegehaupt