Directing Slurry Into Association With Mold Patents (Class 162/212)
  • Patent number: 10934664
    Abstract: A method for producing a structured fibrous web, in particular a tissue web, includes bringing a fibrous suspension into contact with at least one structured forming belt and dewatering by using at least one dewatering element, in particular a suction element. The at least one structured forming belt includes a layer of polymer foam providing a paper-contacting side of the structured forming belt. The structure of the foam layer is at least partially transferred to the fibrous web. A structured forming belt and a machine for producing a fibrous web are also provided.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: March 2, 2021
    Assignee: Voith Patent GmbH
    Inventors: Robert Eberhardt, Matthias Schmitt, Frank Opletal
  • Patent number: 10537913
    Abstract: A coater assembly includes an array of side-by-side selectively closable slot portions to control pressurized fluid flow onto a substrate during relative movement between the coater assembly and the substrate to form a coating pattern on the substrate. A control module produces the coating pattern via control over selective independent closure of the slot portions based on a mapping matrix of individually addressable coatable elements.
    Type: Grant
    Filed: April 29, 2013
    Date of Patent: January 21, 2020
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Henryk Birecki, Napoleon I Leoni, Omer Gila
  • Patent number: 10307939
    Abstract: Methods related to inductive heating in extruders. In some embodiments, a method for heating a feedstock or liquid material can include providing a heating body having inlet and outlet orifices connected via a passage or passages or mixing chamber to define a nozzle, and forming a magnetic loop with a coil of conductive wire wound through the center and around the outside of a core of magnetic but electrically non-conductive or low-conductivity material. The method can further include a high-frequency alternating current applied to the coil, producing a magnetic flux locally heating the nozzle. Some embodiments have passive regulation or limiting of nozzle temperature by selection of a core material with an appropriate Curie temperature.
    Type: Grant
    Filed: January 25, 2017
    Date of Patent: June 4, 2019
    Inventors: Ralph L. Stirling, Luke Chilson, Alex English
  • Patent number: 9702085
    Abstract: Paper product is made starting from aqueous furnish containing fibers and filler. Anionically charged nanofibrillar cellulose and cationic strength additive are added to the aqueous furnish, and the furnish is made to a paper product by dewatering the furnish. Filler content of the paper product can be increased above 40 wt-%.
    Type: Grant
    Filed: August 21, 2013
    Date of Patent: July 11, 2017
    Assignee: UPM-KYMMENE CORPORATION
    Inventors: Mika V. Kosonen, Mika Räty, Jussi Ventola
  • Patent number: 9596720
    Abstract: One embodiment of a heated nozzle for extruding meltable material consists of an electrically conductive nozzle, comprised of an inlet, an outlet, and a passage connecting inlet and outlet. The nozzle fits into a hole or gap cut or formed through a loop of high permeability soft magnetic material such as ferrite or pressed iron powder. Electrically conductive wire is coiled around and through this magnetic loop to form a coil. A high-frequency alternating current is supplied to the coil, inducing a magnetic field in the magnetic core. The magnetic field, when passing through the electrically conductive nozzle, induces eddy currents that heat the nozzle to melt the material entering the inlet.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: March 14, 2017
    Assignee: ProtoParadigm LLC
    Inventors: Ralph L. Stirling, Luke Chilson, Alex English
  • Publication number: 20140083637
    Abstract: A method for individualizing a trichome from an epidermis of a non-seed portion of a trichome-bearing plant in the Stachys genus to form a fibrous structure is provided. The method comprises contacting the plant with a device to separate the trichome from the epidermis and incorporating the separated trichome into a fibrous structure.
    Type: Application
    Filed: December 2, 2013
    Publication date: March 27, 2014
    Applicant: The Procter & Gamble Company
    Inventors: Kenneth Douglas VINSON, Teresa Jean FRANKLIN
  • Publication number: 20130213594
    Abstract: Processes for making fluff pulp sheets mechanically eliminate many unwanted fiber-to-fiber bonding (fiber bundles) in the sheet. Pulp slurry is deposited on a moving bottom forming wire to form a stock web. Pulp slurry is brought into contact with a moving top forming wire. The stock web is subjected to up and down dewatering creating separately formed layers to reduce fiber-to-fiber bonding. The stock web can be subjected to strong pulsating shear forces as it is being advanced along the bottom forming wire to break fiber bundles. The pulp slurry can be deposited on the bottom forming wire utilizing a headbox with dilution control to selectively adjust the concentration of the pulp slurry. Shoe presses can be used to dewater the web after it is subjected to the pulsating shear forces.
    Type: Application
    Filed: February 16, 2012
    Publication date: August 22, 2013
    Applicant: INTERNATIONAL PAPER COMPANY
    Inventors: JYRKI T. JAAKKOLA, JAMES E. SEALEY
  • Publication number: 20120193056
    Abstract: Disclosed herein are cylinder forming apparatuses for making nonwoven webs. In one embodiment, a cylinder forming apparatus has a first source configured to dispense a first fluid flow stream, and a second source configured to dispense a second fluid flow stream, wherein at least the first fluid flow stream comprises a fiber; an arcuate mixing partition downstream from the one or more sources, the arcuate mixing partition positioned between the first and second flow streams, the apparatus defining one or more openings that permit fluid communication between the two flow streams; and a cylindrical receiving region situated downstream from the sources and proximal to the first flow stream and designed to receive at least a combined flow stream and form a nonwoven web by collecting fiber from the combined flow stream. Methods of using the apparatuses are also disclosed.
    Type: Application
    Filed: January 26, 2012
    Publication date: August 2, 2012
    Applicant: DONALDSON COMPANY, INC.
    Inventors: Hemant Gupta, Ajay Singh
  • Patent number: 7776183
    Abstract: A forming section for a gap blade former type papermaking machine having a headbox which delivers a jet of papermaking stock between a conveying forming fabric and a backing forming fabric is provided. The conveying fabric moves in sliding contact over an impingement shoe on which the jet of papermaking stock is delivered at a point of impingement. A forming shoe located immediately downstream of the impingement shoe over which the backing forming fabric slides. The impingement shoe is mounted for at least one of pivoting and transverse movement so that a position of the point of impingement of the jet of papermaking stock can be adjusted by at least one of rotating the impingement shoe about a first pivot point and transversely shifting the impingement shoe. The forming shoe can also be mounted for movement.
    Type: Grant
    Filed: November 16, 2005
    Date of Patent: August 17, 2010
    Assignee: AstenJohnson, Inc.
    Inventors: Vaughn Wildfong, Thomas Helbig
  • Patent number: 7588663
    Abstract: A multiple mode headbox is provided including a support surface, two or more chambers, and an adjustable roof. Each chamber includes a plurality of nozzles adapted to optionally supply papermaking fibers to the support surface. The adjustable roof is operably configured to adjust over a range of movement such that it defines a forming zone between the support surface and at least one chamber in a first mode, and between said support surface and at least one different said chamber in a second mode.
    Type: Grant
    Filed: October 20, 2006
    Date of Patent: September 15, 2009
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Henry Skoog, James W. Clark, Joseph K. Baker, John M. Conner
  • Patent number: 7578905
    Abstract: Methods for achieving even transverse distribution and propagation of a flowing medium are disclosed in which the flowing medium is supplied through a conduit and is deflected during diverging propagation in at least one distribution gap. The method includes deflecting the flowing medium during diverging propagation along the distribution gap in which the medium is conveyed through a passage to an outlet gap having a larger depth than the depth of the distribution gap. The medium is conveyed over an edge of the passage extending transverse to the direction of the flow, and the edge is designed to obtain a propagation along the flowing path of the diverging medium that provides a substantially even and parallel flow of the medium along the outlet gap. Apparatus for achieving this method is also disclosed.
    Type: Grant
    Filed: January 13, 2005
    Date of Patent: August 25, 2009
    Assignee: Metso Paper, Inc.
    Inventors: Jörgen Lundberg, Olof Melander
  • Patent number: 7560009
    Abstract: The present invention relates to a method for machining of a surface (31) of a roll in a twin-wire press (2), comprising lower rolls (4, 6, 8, 25?), an endless lower wire (10), upper rolls (14, 16, 18, 25?), and an endless upper wire (12). The rolls comprise a coating (32). An apparatus (50) having a movable machining tool (54) for machining of the coating (32) is arranged in connection to a space between a wire (10, 12) and a roll (4, 6, 8, 14, 16, 18, 25?, 25?). The machining tool (54) of the apparatus is moved, in contact against the surface of the roll (31) for cutting of the coating (32) to a desired level during rotation of the roll. The present invention also relates to an apparatus (50) for machining of a surface (31) of a roll in a twin-wire press for dewatering of a fiber suspension comprising said apparatus.
    Type: Grant
    Filed: March 7, 2005
    Date of Patent: July 14, 2009
    Assignee: Metso Paper, Inc.
    Inventors: Torbjörn Hägg, Leif {umlaut over ())}{umlaut over (})}Odmark
  • Patent number: 7520961
    Abstract: The invention relates to a process for blending liquid flows, particularly in the approach system to a paper machine. It is characterized by the individual liquid flows being merged, blended with one another, and degassed, all at the same time. In addition, the invention relates to a device for implementing the process, where a degassing device 5, particularly a rotor with degassing holes, is provided in a mixing pipe 1.
    Type: Grant
    Filed: May 13, 2005
    Date of Patent: April 21, 2009
    Assignee: Andritz AG
    Inventors: Josef Glawogger, Erich Harzl
  • Publication number: 20080135197
    Abstract: This invention relates to a method for producing a fibrous web from at least one fibrous suspension in a twin mesh former with a twin mesh zone which has a wedge-shaped intake nip and is formed at least in some sections by two rotating endless meshes, of which the first mesh, which is passed over a preferably positionable inlet roller, is passed in the double mesh zone over several rails rigidly arranged a distance from each other on a preferably movable dewatering box, and of which the second mesh is passed in the twin mesh zone over several rails which are arranged opposite the rails of the preferably movable dewatering box, are supported by way of compliant elements and are pressed with a selectable force against the second mesh.
    Type: Application
    Filed: February 12, 2008
    Publication date: June 12, 2008
    Inventor: Johann Moser
  • Publication number: 20080093042
    Abstract: A multiple mode headbox is provided including a support surface, two or more chambers, and an adjustable roof. Each chamber includes a plurality of nozzles adapted to optionally supply papermaking fibers to the support surface. The adjustable roof is operably configured to adjust over a range of movement such that it defines a forming zone between the support surface and at least one chamber in a first mode, and between said support surface and at least one different said chamber in a second mode.
    Type: Application
    Filed: October 20, 2006
    Publication date: April 24, 2008
    Inventors: Henry Skoog, James W. Clark, Joseph K. Baker, John M. Conner
  • Patent number: 7332060
    Abstract: Twin-wire former for producing a fibrous web. The former includes two endless wire belts arranged to form a twin-wire zone, a dewatering element, and a headbox positioned at an angle relative to an imaginary first horizontal plane. The twin-wire zone includes a first section in which the two wire belts are arranged to run over the dewatering element. The two wire belts are further positioned to form a wedge-like inlet gap that is structured and arranged to receive a fibrous stock suspension directly from the headbox. Additional dewatering elements are utilized. The twin-wire zone includes a second section in which the two wire belts along with the fibrous web formed between the two wire belts are arranged to run downward over the additional dewatering elements. This Abstract is not intended to define the invention disclosed in the specification, nor intended to limit the scope of the invention in any way.
    Type: Grant
    Filed: January 13, 2005
    Date of Patent: February 19, 2008
    Assignee: Voith Paper Patent GmbH
    Inventors: Alfred Bubik, Joachim Henssler, Jürgen Prössl, Franz Stelzhammer
  • Patent number: 7141139
    Abstract: In a process and an arrangement for directing a papermaking pulp towards a regulated outlet (9), accept from successive cleaning stages (6, 14, 20) is totally or partly led towards the outlet (9) while excess accept is led in the opposite direction to the inlet (5) of the preceding cleaning stage (6). For feeding of a forming wire, a common base pipe (8) for collecting accept extends between the outlet (9) and a feeding (3) for fresh pulp, while reject pipes (11, 18) lead to the next cleaning stage (14, 20).
    Type: Grant
    Filed: April 12, 2001
    Date of Patent: November 28, 2006
    Assignee: Pom Technology Oy AB
    Inventors: Paul O Meinander, Juha Lahti, Risto Nykanen
  • Patent number: 6821390
    Abstract: Apparatus and process for controlling the basis weight cross-profile, the formation, the fiber direction and other quality parameters of a pulp sheet after the headbox in a dewatering plant. The apparatus including at least one suspension feed, at least one distribution device and at least one drainage device for excess suspension from the distribution device, where the distribution device has a distribution chamber and a turbulence-generating chamber made up of a number of pipes adjacent to one another. It is mainly characterized by the two peripheral zones of the headbox, comprising distribution chamber and turbulence-generating chamber, each having a discharge device in the sheet running direction for a partial suspension stream.
    Type: Grant
    Filed: March 18, 2002
    Date of Patent: November 23, 2004
    Assignee: Andritz AG
    Inventors: Gerald Schadler, Wilhelm Mausser
  • Patent number: 6770171
    Abstract: 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 measuring sensors (D1, D2; Dmn), by means of which the flow rate profile of the headbox (10) is determined, and the profile bar of the slice opening (14) of the headbox (10) is adjusted in the cross direction on the basis of the thus determined flow rate profile. The headbox (10) is provided with measuring sensors (D1, D2; Dmn) for determining the cross direction flow rate profile of the headbox (10) and with means for adjusting the profile bar on the basis of the flow rate profile.
    Type: Grant
    Filed: October 9, 2002
    Date of Patent: August 3, 2004
    Assignee: Metso Paper, Inc.
    Inventors: Jari P. Hämäläinen, Hannu Lepomäki, Juhana Lumiala, Pasi Sirviö
  • Patent number: 6733627
    Abstract: A method for manufacturing paper having a variable characteristic in a crossmachine direction including the steps of feeding a slurry to a distributor and delivering the slurry from the distributor to a headbox through a plurality of delivery lines. The delivery lines are coupled to the headhox at a plurality of locations spaced across the headbox in a crossmachine direction. The method includes selectively introducing a property altering agent in at least two of the delivery lines at the distributor to selectively alter the properties of the slurry passing through the at least two delivery lines. The method also includes the step of depositing the slurry received by the headbox on a papermaking wire to form paper.
    Type: Grant
    Filed: June 13, 2001
    Date of Patent: May 11, 2004
    Assignee: MeadWestvaco Corporation
    Inventors: Kenneth A. Krukonis, Charles E. Nelson, Mark R. Kleman
  • Patent number: 6706151
    Abstract: A pulp moulding process including the steps of pulp stock, forming wet products by means of forming die (7), transferring the wet products from the forming die by means of a heated transferring die-and-heated pressing tool arrangement (13)(14) for in-mould pressing and drying of the wet product, and delivering the dried products to a down line facility (18). The invention encompasses a pulp moulding system, a pulp moulding apparatus, and a pulp moulded product made by such a process, system and/or apparatus.
    Type: Grant
    Filed: January 28, 2002
    Date of Patent: March 16, 2004
    Assignee: Southern Pulp Machinery (PTY) Limited
    Inventors: Johan Jacob Oosthuizen, Jonathan David Taljaard
  • Patent number: 6679974
    Abstract: In a paper machine headbox, a stock suspension flow passes through turbulence pipes (14an) and is distributed into superimposed layers. Stepped expansion spots (16) of the flow cross-section area of the turbulence pipes (14) or the positions of trailing elements starting from between the pipe rows (Rn) and extending to the slice duct (12) of the headbox control the onset and level of turbulence in each layer. Turbulence is generated in different phases of the flow in different layers by arranging the expansion spots (16) and/or the trailing elements in superimposed layers to be located at different distances from the slice opening (13) of the headbox, whereby a different turbulence prevails at the slice opening (13) in different layers of the stock suspension flow.
    Type: Grant
    Filed: June 24, 2002
    Date of Patent: January 20, 2004
    Assignee: Metso Paper, Inc.
    Inventor: Sakari Soini
  • Patent number: 6669814
    Abstract: This invention, in one aspect, relates to a multi-ply paperboard having at least three inner plies and, in some aspects, a top liner and a back liner, wherein the multi-ply paperboard is derived from fiber sources comprising at least about 80% by weight recycled fiber. The multi-ply paperboard of the present invention exhibits strength characteristics comparable those of paperboard prepared from virgin board. In further aspects, the invention relates to methods of making the multi-ply paperboard of the present invention.
    Type: Grant
    Filed: March 26, 2002
    Date of Patent: December 30, 2003
    Assignee: Rock-Tenn Company
    Inventors: James K. Hansen, Richard L. Munson, Jr., Roberto Balaguer, Jr., Jeffrey M. Leitinger, Thomas F. Barton
  • Publication number: 20030178167
    Abstract: 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 of stock flow by a simple and inexpensive means, resulting in speedup of papermaking process. Said flow tubes has a smaller diameter pipe portion of a circular cross-section in the inlet side, a larger diameter pipe portion connected to said smaller diameter pipe portion, a tapered pipe portion, and a rectangular pipe portion, the cross-sectional configuration of said tapered pipe portion being changed smoothly from circular to rectangular configuration.
    Type: Application
    Filed: May 27, 2003
    Publication date: September 25, 2003
    Inventors: Keiichi Fujiki, Tetsuo Makino, Akimine Izawa
  • Publication number: 20030168191
    Abstract: This invention, in one aspect, relates to a multi-ply paperboard having at least three inner plies and, in some aspects, a top liner and a back liner, wherein the multi-ply paperboard is derived from fiber sources comprising at least about 80% by weight recycled fiber. The multi-ply paperboard of the present invention exhibits strength characteristics comparable those of paperboard prepared from virgin board. In further aspects, the invention relates to methods of making the multi-ply paperboard of the present invention.
    Type: Application
    Filed: March 26, 2002
    Publication date: September 11, 2003
    Inventors: James K. Hansen, Richard L. Munson, Roberto Balaguer, Jeffrey M. Leitinger, Thomas F. Barton
  • Publication number: 20030159790
    Abstract: Process for forming and a headbox for producing a fibrous material web from a pulp suspension to form one of a paper or cardboard web. The headbox includes a headbox nozzle and at least one lamella, and the process includes providing a structured surface with at least one structure one of in and on a surface of the at least one lamella, such that the structured surface is arranged to generate cross flows inside the pulp suspension, whereby the cross flows lead to shear flows in the suspension stream.
    Type: Application
    Filed: February 26, 2003
    Publication date: August 28, 2003
    Applicant: VOITH PAPER PATENT GMBH
    Inventors: Wolfgang Ruf, Hans Loser
  • Publication number: 20030106661
    Abstract: In the short circulation of a paper machine, a chemicals flow (F1) is fed into a fibre suspension flow in connection with a pipe expansion comprising a first pipe (1) and a second pipe (2) having a larger diameter than the first pipe, which pipes are connected to each other by means of an expansion step (3) perpendicular to the direction of flow. The chemicals flow (F1) can be passed so as to be mixed with the fibre suspension flow either in the second pipe (2) in an ideal mixing zone situated after the expansion step (3) or in the first pipe (1) so close to the expansion step (3) that the chemicals which are added have no time to react with the fibre suspension before the flow enters the expansion step (3).
    Type: Application
    Filed: December 9, 2002
    Publication date: June 12, 2003
    Inventors: Hannu Lepomaki, Juhani Sams
  • Publication number: 20030106660
    Abstract: The present invention relates to a method of and an apparatus for controlling the operation of the short circulation of a paper, paper board or the like production machine. The method and apparatus according to the invention are especially preferably suitable for use in the approach system, i.e. so-called short circulation, of said production machines for regulating the headbox feed pressure. A characteristic feature of the method and apparatus according to the invention is that at a suitable location in the approach system of said production machine there is arranged a controllable parallel flow, by means of which at least one flow in the approach system is regulated so that the pressure in the headbox remains essentially constant.
    Type: Application
    Filed: July 16, 2002
    Publication date: June 12, 2003
    Inventors: Lasse Bjorkstedt, Jouni Matula
  • Publication number: 20030102099
    Abstract: Dispersed powders are disclosed that comprise fine nanoscale powders dispersed on coarser carrier powders. The composition of the dispersed fine powders may be oxides, carbides, nitrides, borides, chalcogenides, metals, and alloys. Fine powders discussed are of sizes less than 100 microns, preferably less than 10 micron, more preferably less than 1 micron, and most preferably less than 100 nanometers. Methods for producing such powders in high volume, low-cost, and reproducible quality are also outlined. Such powders are useful in various applications such as catalysts, sensor, electronic, electrical, photonic, thermal, biomedical, piezo, magnetic, catalytic and electrochemical products.
    Type: Application
    Filed: December 4, 2001
    Publication date: June 5, 2003
    Inventors: Tapesh Yadav, Karl Pfaffenbach, Roger Dirstine
  • Publication number: 20030024673
    Abstract: A process, and an apparatus, for improving sheet properties in the initial impingement zone of a paper making machine including a forming section, a forming fabric moving in the machine direction and a head box having a head box slice which delivers a stock jet onto the moving forming fabric. The scale and intensity of agitation within the stock is adjusted by adjusting some of the support elements beneath the forming fabric adjacent the head box slice so that they either contact, or do not contact, the machine side surface of the forming fabric and observing the effect, if any, that the adjustment has on the quality of the sheet product being made on the paper making machine. This technique is of use in a papermaking machine forming section having a single open surface forming fabric, in the initial open surface section of a so-called hybrid gap former having two superposed forming fabrics, and in the forming section of a two fabric papermaking machine.
    Type: Application
    Filed: July 22, 2002
    Publication date: February 6, 2003
    Inventors: Roy Van Essen, Mark Landry, Richard Pitt
  • Publication number: 20020195219
    Abstract: This invention relates to an improved structure of a head box for a paper making machine. The sidewalls of a nozzle of a head box shall be movable with the rotation of a roll transporting a forming wire of the paper making machine. Thus, the homogeneity of produced paper can be improved and the production rate of paper increased.
    Type: Application
    Filed: June 25, 2002
    Publication date: December 26, 2002
    Inventors: James G. Doyle, Gerhard Luettich
  • Publication number: 20020195214
    Abstract: A cylinder former having a variable hydraulic pulse whilst drainage, for use in papermaking comprising a drainage means comprising a cylinder mould and a contoured member adjacent the cylinder mould having a plurality of hills and valleys which force entrained liquid through the fiber suspension forming on the cylinder mould so as to improve sheet formation. A baffle is provided in the discharge portion of the former to prevent stock build-up therein.
    Type: Application
    Filed: August 26, 2002
    Publication date: December 26, 2002
    Inventor: Luis Fernando Cabrera y Lopez Caram
  • Publication number: 20020189774
    Abstract: This invention relates to an improvement in coatings particularly suited for the preparation of paper products having an ink jet coating applied thereto and to the resulting paper products. The improvement in ink jet coatings resides in the incorporation of a primary amine functional polyvinyl alcohol (PVOH/PVNH2) as a polymeric binder. One form of an amine functional polyvinyl alcohol is produced by the hydrolysis of a copolymer of vinyl acetate and N-vinylformamide or vinyl acetate and allyl amine. Another is the polyvinyl butyral derivative of polyvinyl alcohol which typically is formed by the reaction of a 4-amino alkyl aldehyde dialkyl acetal, such as 4-aminobutyraldehyde dimethyl acetal with polyvinyl alcohol.
    Type: Application
    Filed: March 8, 2001
    Publication date: December 19, 2002
    Inventor: John Richard Boylan
  • Patent number: 6491792
    Abstract: 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 properties of those samples. A method of regulating one or more properties of a moving web, and especially a paper web during manufacture, employing the aforesaid method and apparatus are also disclosed.
    Type: Grant
    Filed: July 18, 2001
    Date of Patent: December 10, 2002
    Assignee: Metsuo Paper, Inc.
    Inventors: John Francis Shakespeare, Juha Antero Kniivilä, Petri Nyberg
  • Publication number: 20020148587
    Abstract: Apparatus and process for controlling the basis weight cross-profile, the formation, the fiber direction and other quality parameters of a pulp sheet after the headbox in a dewatering plant. The apparatus including at least one suspension feed, at least one distribution device and at least one drainage device for excess suspension from the distribution device, where the distribution device has a distribution chamber and a turbulence-generating chamber made up of a number of pipes adjacent to one another. It is mainly characterized by the two peripheral zones of the headbox, comprising distribution chamber and turbulence-generating chamber, each having a discharge device in the sheet running direction for a partial suspension stream.
    Type: Application
    Filed: March 18, 2002
    Publication date: October 17, 2002
    Inventors: Gerald Schadler, Wilhelm Mausser
  • Patent number: 6461479
    Abstract: The invention relates to a process for distributing an especially medium-consistent fibrous suspension in front of a dewatering device. It is distinguished in that the fibrous suspension is taken to the dewatering device in fluidized form and evenly distributed. The invention also relates to a device for implementing the process in which there is a closed device with a fluidizing rotor in front of the dewatering device.
    Type: Grant
    Filed: May 10, 1999
    Date of Patent: October 8, 2002
    Assignee: Ádritz-Patentverwaltungs-Gesellschaft m.b.H.
    Inventors: Franz Petschaurer, Reinhard Pinter, Adolf Engler
  • Patent number: 6451167
    Abstract: A mat containing highly machine direction oriented (90% or greater), discontinuous reinforcement fibers, is produced on inclined wire or rotary paper making machinery. Fibers are first uniformly dispersed in an aqueous medium containing thickeners and wetting agents. In one embodiment, antifoaming agents are also added to prevent floating fibers which entangle and reduce orientation. Thermoplastic fibers or particles may also be included. Stock is brought into an open headbox in a flow pattern which allows the fibers to decelerate before approaching the porous suction belt (wire). As the fibers approach the suction belt, the fibers begin to turn and align in the streamline so as to present one end toward the suction wire. The leading ends of the fibers are gripped by the moving belt which drags the fibers out of the dispersion stock in a straight line. The porous mat produced may be dried and bonded through hot air, heat and/or pressure, or chemical binders.
    Type: Grant
    Filed: April 26, 2000
    Date of Patent: September 17, 2002
    Assignee: Virginia Tech Foundation, Inc.
    Inventor: Stephen P. Scheinberg
  • Publication number: 20020121354
    Abstract: Methods and apparatus to condition the paper fiber stock of a wet paper web for enhanced dewatering and formation with an acoustic foil assembly used for removing water and redistributing fibers. A plane ultrasonic wave field is employed for interacting with water suspended pulp and paper fiber stock using acoustic techniques to subject particulate suspensions. The continuous process employees a piezoelectric ceramic transducer to selectively deflect flowing paper fiber stock as they penetrate the ultrasonic field. Depending upon the amount of dissolved gas in water, conditioning is obtained using a traveling wave field to improve paper properties for increased productivity and formation quality with headbox components having hydrodynamic optimization for paper and board forming.
    Type: Application
    Filed: February 27, 2002
    Publication date: September 5, 2002
    Inventor: Cyrus K. Aidun
  • Patent number: 6419793
    Abstract: Method for forming a continuous web on a forming fabric includes providing a pressurized chamber, processing the forming fabric through the pressurized chamber, and distributing a pressurized flow of a slurry having a first composition in the pressurized chamber across the width of the forming fabric to form the continuous web.
    Type: Grant
    Filed: August 31, 2000
    Date of Patent: July 16, 2002
    Assignee: Voith Sulzer Papiertechnik Patent GmbH
    Inventor: David A. Beck
  • Patent number: 6406595
    Abstract: Methods and apparatus to enhance paper and board forming qualities with insert tubes and/or a diffuser block in the paper forming machine headbox component which generates vorticity in the machine direction (MD) which is superimposed on the streamwise flow to generate a swirling or helical flow through the tubes of the diffuser block. Tubes of the diffuser block are designed such that the direction of the swirl or fluid rotation of the paper fiber stock may be controlled and the direction thereof is controlled in such a way to provide effective mixing, coalescence and merging of the jets of fluid emanating from the tubes into the converging section, i.e., nozzle chamber of the headbox. Also disclosed is the effective mixing of the jets generating cross-machine direction (CD) shear between the rows of jets that form at the outlet of the tubes inside the nozzle chamber of the headbox to align paper fibers in the cross-machine direction.
    Type: Grant
    Filed: August 25, 2000
    Date of Patent: June 18, 2002
    Assignee: Institute of Paper Science and Technology, Inc.
    Inventor: Cyrus K. Aidun
  • Patent number: 6342125
    Abstract: A multi-ply web forming method and apparatus are disclosed for forming a top ply onto a base ply. A fiber suspension jet is by means of a secondary headbox (21; 21′, 26) delivered into a twin-wire roll nip created by two tensioned wires (16, 22; 16′, 22′; 22, 27) one of which (16; 16′, 22) carries the moist base ply.
    Type: Grant
    Filed: April 13, 2000
    Date of Patent: January 29, 2002
    Inventor: Bengt Nordström
  • Patent number: 6319363
    Abstract: A sheet forming system of a paper or cardboard machine. A headbox includes a headbox nozzle with to laterally extending side panels and first and second nozzle walls extending along a width of the machine. First and second screens converge in a region adjacent the headbox nozzle. At least two guide mechanisms, each having a guide surface, guide the first and second screens in the region. At least one support mechanism supports at least a portion of one of the first and second nozzle walls against said guide surface of at least one of said at least two guide mechanisms.
    Type: Grant
    Filed: November 9, 1999
    Date of Patent: November 20, 2001
    Assignee: Voith Sulzer Papiertechnik Patent GmbH
    Inventors: Wolfgang Ruf, Peter Mirsberger, Holger Humberg
  • Patent number: 6294051
    Abstract: An apparatus and method for forming a thin fibrous mat, such as a tissue sheet, with improved edge strength is disclosed. The apparatus includes a headbox having a top, a bottom, a pair of lateral sides, a back with an inlet formed therein and a front with an outlet formed therein. A first conduit is connected to the inlet of the headbox and flow therethrough is regulated to convey a first aqueous slurry at a desired flow rate into the headbox. The first aqueous slurry has a predetermined fiber consistency. A second conduit is connected to one of the lateral sides of the headbox and a second aqueous slurry is directed therethrough into the headbox at a different flow rate than through the first conduit. The apparatus also includes a mechanism for drying or draining water from the aqueous slurry exiting the outlet to form a thin fibrous mat. The thin fibrous mat has increased strength adjacent to an edge located downstream from the second conduit.
    Type: Grant
    Filed: April 13, 1999
    Date of Patent: September 25, 2001
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Richard Martin Urquhart, Paul Douglas Beuther
  • Patent number: 6284100
    Abstract: 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 properties of those samples. A method of regulating one or more properties of a moving web, and especially a paper web during manufacture, employing the aforesaid method and apparatus are also disclosed.
    Type: Grant
    Filed: January 26, 1998
    Date of Patent: September 4, 2001
    Assignee: Valmet Corporation
    Inventors: John Francis Shakespeare, Juha Antero Kniivilä, Petri Nyberg
  • Patent number: 6221210
    Abstract: The present invention relates to transfer paper in electrophotography that shrinks by no more than 0.45% in a direction crossing a flow in making paper process and which has a two sideness shrinkage difference in a crossing direction ranging 0.02 to −0.02%. The present invention also relates a process for producing electrophotographic transfer paper comprising the steps of feeding pulp suspension liquid onto at least one wire to form a paper layer in making paper process, in which a ratio between feeding speed of the pulp suspension liquid and moving speed of wire is controlled to cause a propagating velocity ratio of longitudinal waves of a produced transfer paper in the range from 1.1 to 1.5.
    Type: Grant
    Filed: May 16, 1995
    Date of Patent: April 24, 2001
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Tsutomu Kurihara, Hiroyoshi Hosomura, Katsumi Harada
  • Patent number: 6214169
    Abstract: Sheet formation system and method for reducing wavy edges in a fourdrinier machine. The system includes a headbox having a nozzle bring adapted to produce a pulp suspension jet across a width of the machine, at least one rotating screen positioned to receive the pulp suspension jet, and at least two deckle plates adjacent to the screen. The deckle plates may be adjustably positionable such that a distance between the deckle plates and a centerline of the screen is adjustable in a machine direction over a substantial portion of a length of the side shields. The method includes directing a pulp suspension jet onto the rotating shield between the deckle plates to form a web sheet, moving the web sheet in a machine direction, and adjusting a distance between the deckle plates as the web sheet is moved in the machine direction.
    Type: Grant
    Filed: August 27, 1998
    Date of Patent: April 10, 2001
    Assignee: Voith Sulzer Papiermaschinen GmbH
    Inventors: Wolfgang Ruf, Thomas Dietz, Konstantin Fenkl
  • Patent number: 6176975
    Abstract: A headbox in a paper machine, which headbox has a stock outlet for a jet of stock having a specific length, angle of impact and point of encounter in relation to a nip in the wet section of the paper machine, which headbox has two stand parts, lifting arms with front and rear journalling means and a device for setting the position and alignment of the headbox so that the stock jet obtains said specific length, angle of impact and point of encounter, which setting device has two actuators mounted pivotably at the rear Journalling means of the lifting arms and at the stand parts, whereby the headbox is adjustable by means of a turning movement about said front bearing means of the lifting arms.
    Type: Grant
    Filed: January 14, 1999
    Date of Patent: January 23, 2001
    Assignee: Valmet-Karlstad AB
    Inventors: Tommy Göran Andersson, Nils Ulf Haraldsson, Ernst Tomas Svensson
  • Patent number: 6146500
    Abstract: A suction breast roll former has a support surface with a plurality of apertures formed therein that are operatively connected to a vacuum source. A headbox has a flexible roof extending downstream from a slice opening and disposed adjacent to a support surface of the suction breast roll. The headbox permits the flexible roof to bend over a range of movement relative to the support surface to match the shape of a drainage curve suiting current operating conditions. A method of forming a paper web includes the steps of supplying an aqueous suspension of papermaking fibers to a forming zone created between the suction breast roll and the headbox. The headbox includes a slice body and an apron that define a slice opening therebetween and also has a flexible roof extending from the slice opening and spaced from the support surface to define a forming zone therebetween. A forming fabric is passed through the forming zone to receive the aqueous suspension of papermaking fibers.
    Type: Grant
    Filed: May 6, 1999
    Date of Patent: November 14, 2000
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Frank Stephen Hada, Keith Douglas Glass, Ronald Frederick Gropp
  • Patent number: 6139687
    Abstract: Improvements in the internal dividers of a papermaking headbox are provided by stiffening the dividers only in the cross-machine direction. These cross-machine stiffened dividers provide for a smooth and thin divider that is flexible in the machine direction and yet is strong and resists distortion, buckling or bending in the cross-machine direction.
    Type: Grant
    Filed: July 8, 1999
    Date of Patent: October 31, 2000
    Assignee: Kimberly Clark Worldwide
    Inventor: Paul D. Beuther
  • Patent number: 6117271
    Abstract: A slice lip apparatus is disclosed for guiding a flow of stock from a headbox so that the stock flows between a first and a second wire of a former. The apparatus includes a lip which is disposed adjacent to the first wire. A movable lip is spaced relative to the lip so that the lips defined therebetween a slice for the passage therethrough of the flow of stock. An adjustable guide shoe is disposed adjacent to the movable lip for guiding the second wire. A linkage extends between the movable lip and the adjustable guide shoe. The arrangement is such that when the movable lip is selectively moved relative to the lip, such selective movement generates a corresponding movement of the adjustable guide shoe relative to the first wire.
    Type: Grant
    Filed: April 15, 1998
    Date of Patent: September 12, 2000
    Assignee: Beloit Technologies, Inc.
    Inventor: Robert E. Page