Mechanical Treatment Of Slurry In Head Box Or Approach Flow Patents (Class 162/216)
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Patent number: 11959230Abstract: A molding system includes a frame device, a scooping device, a demolding device, a cutting device, an inspection device, a packaging device, and a conveying device. The frame device defines a scooping zone, a hot pressing zone, a cutting zone, an inspection zone, and a packaging zone. The scooping device includes a pulp tank that is adapted to contain a slurry, and a scooping mold that is adapted to scoop the slurry such that the slurry forms a blank unit thereon. The cutting device is adapted to cut the blank unit into a plurality of blank bodies. The conveying device is adapted to convey the blank bodies from the cutting zone to the packaging zone through the inspection zone.Type: GrantFiled: February 24, 2022Date of Patent: April 16, 2024Inventors: Fu-Lin Hsiao, Yang-Han Lee
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Patent number: 11828025Abstract: The present invention relates to multi-layer fiber products and a method of manufacturing these kinds of products. The present product comprises a first layer consists mainly of natural fibers and a second, heat-sealing layer located on top of the first layer. The heat-sealing layer consists mainly of synthetic thermoplastic fibers or particles. According to the present method, the heat-sealing layer is brought onto the first layer already during the web forming process, the first and the second layers being formed and joined together in a foam forming process. With the present invention, it is possible to decrease the amount of plastic materials in packaging materials having heat-sealing properties.Type: GrantFiled: June 17, 2022Date of Patent: November 28, 2023Assignee: Paptic OyInventors: Karita Kinnunen-Raudaskoski, Marja Juvonen, Esa Torniainen, Martin Häggblom, Tuomas Mustonen
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Patent number: 11661702Abstract: A sheet manufacturing apparatus includes a case that accommodates raw material pieces including fibers, a rotator that rotates inside the case to stir the raw material pieces, a stirring motor that rotates the rotator, a transport apparatus that transports the raw material pieces through a transport path coupled to a side wall of the case, and a control apparatus that controls rotation states of the rotator and the transport apparatus, in which the transport apparatus includes a discharge pipe that rotates on a central axis along the transport path, and a transport motor that rotates the discharge pipe.Type: GrantFiled: June 16, 2020Date of Patent: May 30, 2023Assignee: Seiko Epson CorporationInventors: Koji Motohashi, Makoto Sato, Takashi Abe
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Patent number: 10513825Abstract: A paper manufacturing system includes a paper machine that has a headbox to contain a slurry of fluid mixed with cellulosic fibers. The headbox has an opening therein to direct the slurry outwardly from the headbox. A turbulence unit is positioned within the headbox to agitate the slurry when the slurry travels through the headbox and out of the opening. In this way the turbulence unit facilitates a random organization of the cellulosic fibers in the slurry when the slurry leaves the headbox. The turbulence unit includes a plurality of cylinders and each of the cylinders urges the slurry to swirl into a plurality of eddies when the slurry passes around each of the cylinders. Each of the cylinders is comprised of a carbon fiber material to inhibit adhesion between the cellulosic fibers and the cylinders.Type: GrantFiled: September 18, 2017Date of Patent: December 24, 2019Inventor: Ahmed Ibrahim
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Patent number: 9752280Abstract: A method to form a fibrous web including: introducing a furnish to a headbox of a fiber web machine, wherein the furnish includes a thick stock component and a filtrate, injecting a gas into to the furnish to form a foamed furnish, and laying the foamed furnish on a wire or between wires of a wire section of the fiber web machine to form the fibrous web from the foamed furnish.Type: GrantFiled: July 1, 2016Date of Patent: September 5, 2017Assignees: Valmet Technologies Oy, Wetend Technologies OyInventor: Jouni Matula
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Patent number: 9561191Abstract: The present invention relates to a method for forming a pharmaceutical product, such as a dissolvable film dosage form, onto a surface. Particularly, the present invention relates to a method of forming a pharmaceutical product directly onto the surface of a substrate.Type: GrantFiled: January 15, 2015Date of Patent: February 7, 2017Assignee: MonoSol Rx, LLCInventors: Garry L. Myers, Beuford A. Bogue, Greg Slominski, Kevin Davidson, Laura Miloshoff
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Patent number: 9447543Abstract: A method of manufacturing a fibrous web including: preparing furnish of a thick stock component and filtrate, preparing foamed furnish by mixing a surfactant and gas into the furnish, introducing the foamed furnish to a headbox of a fiber web machine, and laying the foamed furnish on a wire or between wires of a wire section of a fiber web machine for forming the fibrous web, wherein the preparation of the foamed furnish by injecting the gas uses an injection liquid to the furnish.Type: GrantFiled: August 21, 2015Date of Patent: September 20, 2016Assignee: Wetend Technologies OyInventor: Jouni Matula
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Patent number: 8444813Abstract: A method for preparing aramid insulating paper, includes the operations of: providing aramid pulp slurry and aramid short fiber slurry at respective desired concentrations; blending, beating and fluffing the aramid pulp slurry and the aramid short fiber slurry in a given ratio to afford a paper pulp at a desired concentration; transiting the paper pulp to a papermaking machine fitted with a head box to form and make wet paper sheets; pressing to dewater the wet paper sheets and drying the dewatered paper sheets; and calendering the dried paper sheets at a high temperature to obtain the aramid insulating paper, wherein in operation iii), at least one ultrasonic generator is mounted on the head box to apply directional ultrasonic waves to the paper pulp flowing through the heat box. The aramid insulating paper prepared according to the method of the invention has enhanced strength, smoothness and uniformity.Type: GrantFiled: September 5, 2011Date of Patent: May 21, 2013Inventor: Zhou Zhong
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Patent number: 7897079Abstract: A method of producing a paperless gypsum/fiber board from a mixture including reinforcing material particles, calcined gypsum and water. A headbox feeds the mixture into a panel forming area (forming pond) over the upper surface of a continuous forming fabric to form a panel mat. Also, a reinforcing mesh is fed over a transverse member, located over a portion of the forming fabric, and into the forming pond to embed the mesh in the mixture. At least a portion of a downstream end of the transverse member is under a downstream portion of the headbox or downstream of the headbox. Then the panel mat is pressed, the calcined gypsum of the pressed panel mat is rehydrated, and the resulting board is dried.Type: GrantFiled: September 21, 2006Date of Patent: March 1, 2011Assignee: United States Gypsum CompanyInventor: David Paul Miller
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Patent number: 7520961Abstract: 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: GrantFiled: May 13, 2005Date of Patent: April 21, 2009Assignee: Andritz AGInventors: Josef Glawogger, Erich Harzl
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Publication number: 20080110588Abstract: A procedure and arrangement to control the lamella of a headbox's lip channel, when the mass flow goes in the headbox (3) through the lip channel (2), in which case single mass flows are held separate from each other with the lamella (1) before the flows are united after the lamella. The lamella's dimensions, mechanical characteristics and/or dynamic characteristics are changed at least in the lamella's border area with an active structure, which is active and/or passive active tool and/or active and/or passive active material.Type: ApplicationFiled: March 8, 2006Publication date: May 15, 2008Applicant: Metso Paper, Inc.Inventors: Hannu Lepomaki, Petri Jetsu, Jukka T. Heikkinen, Ari Puurtinen, Juhana Lumiala
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Patent number: 7318883Abstract: 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), there is at least one such pipe portion as comprises a wave-shaped form in its connection in the cross section of the pipe.Type: GrantFiled: December 5, 2000Date of Patent: January 15, 2008Assignee: Metso Paper, Inc.Inventors: Jouni Rahkomaa, Sakari Soini
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Patent number: 7166193Abstract: A method of ensuring the flatness of a vane that is mounted in a headbox by means of a mounting arrangement including engagement dowels for cooperation with a downstream support wall of a transverse groove, said vane being affected during operation by shearing forces from the stock and by retaining forces from the mounting arrangement. In accordance with the invention outer engagement dowels are mounted at the side edges of the vane to cooperate during a specific period of time, as the only engagement dowels with the downstream support wall in order to take up said shearing forces, whereby tensile stresses will arise in the downstream end portion of the vane in the cross machine direction.Type: GrantFiled: November 30, 2004Date of Patent: January 23, 2007Assignee: Metso Paper Karlstad ABInventors: Jan Anders Erikson, Tord Gustav Gustavsson, Ingvar Berndt Erik Klerelid, Joakim Norrman
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Patent number: 7067040Abstract: A headbox (10) of a paper machine or such includes a bypass manifold (J1), from which the pulp is conducted by way of pipes (11a1.1, 11a1.2 . . . 11a2.1, 11a2.2 . . . ) of pipe rows in a set of pipes (11) and an intermediate chamber (E) into a turbulence generator (12), or from the bypass manifold (J1) directly into the turbulence generator and by way of the pipes (12a1.1, 12a1.2, . . . ; 12a2.1, 12a2.2 . . . ) of the turbulence generator's (12) pipe rows into a lip cone (K) and further out from the headbox on to a formation wire. The turbulence generator (12) of the headbox includes a fluidization element (14), wherein fluidization is carried out in one stage only and in which structure as little disturbance as possible is then caused to the fluidised flow.Type: GrantFiled: June 12, 2001Date of Patent: June 27, 2006Assignee: Metso Paper, Inc.Inventors: Hannu Lepomäki, Maarit Tukiainen, Jyrki Huovila
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Patent number: 6986832Abstract: The invention relates to a method and a mixer for mixing flows of a papermaking process. In the invention, a first flow is conveyed through a tube, and turbulence is generated in it by means of form parts located on the inner periphery of the tube. The mixing zone of the mixer comprises feed openings on the inner periphery of the tube for feeding a second flow from a feed channel outside the tube into the first flow, whereby the flows are mixed as a result of the turbulence generated by the form parts. According to a preferred embodiment of the invention, at least one form part comprises a feed opening.Type: GrantFiled: February 19, 2002Date of Patent: January 17, 2006Assignee: Metso Paper Inc.Inventors: Perttu Lamminen, Matti Hietaniemi, Juhani Sams, Kati Lindroos
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Patent number: 6962647Abstract: A headbox, for example, in a pulp or board machine, is suitable for high basis weights which are over 400 g/m2 and for high fiber suspension consistencies which are in a range of 2–5%. The headbox has a turbulence part (1), into which a fiber suspension flows from a tube bank (2), and a slice part (3) which is situated after the turbulence part and from which the fiber suspension flows to a forming section of a fibrous web. The turbulence part (1) of the headbox has at least two passages (5, 6), which converge in the flow direction of the fiber suspension towards the slice part (3). In that connection, the fiber suspension flow is first fluidized in a tortuous turbulence passage part (11) and, after that, it decelerates in another widening deceleration passage (12).Type: GrantFiled: May 3, 2001Date of Patent: November 8, 2005Assignee: Metso Paper, Inc.Inventors: Markku Ronnila, Jaakko Jantunen, Erkki Ilmoniemi
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Patent number: 6962646Abstract: Multi-layer headbox for a paper machine that includes a plurality of nozzle chambers having outlet gaps located at nozzle chamber ends. Each of the plurality of nozzle chambers are assigned to different layers, and at least one of the plurality of nozzle chambers has a length in a flow direction that is different from a length of at least one other of the plurality of nozzle chambers. 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: GrantFiled: March 26, 2003Date of Patent: November 8, 2005Assignee: Voith Paper Patent GmbHInventors: Mathias Schwaner, Jürgen Proessl
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Patent number: 6902650Abstract: 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: GrantFiled: November 3, 2003Date of Patent: June 7, 2005Assignee: International Paper CompanyInventors: Chang Shin Park, Hanjian Xu
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Patent number: 6890408Abstract: 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 is located in the conduit for introducing a fluid medium. A headbox nozzle is located downstream from the at least one turbulence producer for delivering the material suspension. A portion of a flow resistance located downstream of the metered addition point is at least approximately 50% of a total flow resistance of the at least one conduit.Type: GrantFiled: August 23, 2002Date of Patent: May 10, 2005Assignee: Voith Sulzer Papiertechnik Patent GmbHInventors: Wolfgang Ruf, Hans Loser, Klaus Lehleiter
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Patent number: 6875312Abstract: A method for fluidisation of a pulp flow in the headbox of a paper machine or such. The characteristics of the pulp flow are affected in the headbox's fluidiser (14) in one step only, whereby the height (h1) of the step is at least equal to the average fibre length, and after the fluidiser (14) the biggest permissible step expression in the flow channel in direction z is smaller than the average fibre length.Type: GrantFiled: June 12, 2001Date of Patent: April 5, 2005Assignee: Metso Paper, Inc.Inventors: Hannu Lepomäki, Hannu Karema, Markku Kellomäki, Maarit Tukiainen
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Publication number: 20040154775Abstract: 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: ApplicationFiled: November 3, 2003Publication date: August 12, 2004Inventors: Chang Shin Park, Hanjian Xu
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Patent number: 6746572Abstract: Method for determining a characteristic value for a binding force potential of paper fibers in a fibrous suspension. The method includes measuring an air content of the fibrous suspension and deriving the characteristic value from the measuring.Type: GrantFiled: July 1, 2002Date of Patent: June 8, 2004Assignee: Voith Paper Patent GmbHInventor: Michael Schwarz
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Patent number: 6740198Abstract: The invention relates to a method of mixing pulp components in the manufacture of paper, in which method the pulp components to be mixed are led to a mixing point along tubes arranged inside each other. The pulp component flows are mixed by generating turbulence in them by means of the end of an inner tube, the cross-section of which end is wave-like. This turbulence is guided and its effect is intensified by means of form parts in connection with the mixing point, which form parts are arranged on the inner surface of the outer tube. Further, the invention relates to an arrangement implementing the mixing of pulp components in accordance with the method.Type: GrantFiled: April 4, 2002Date of Patent: May 25, 2004Assignee: Metso Paper Inc.Inventors: Jussi Ahola, Elina Pohjala, Sakari Soini, Veli-Matti Rajala, Kati Lindroos, Petri Nyberg, Pentti Saarenrinne
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Patent number: 6679974Abstract: 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: GrantFiled: June 24, 2002Date of Patent: January 20, 2004Assignee: Metso Paper, Inc.Inventor: Sakari Soini
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Publication number: 20030183352Abstract: Multi-layer headbox for a paper machine that includes a plurality of nozzle chambers having outlet gaps located at nozzle chamber ends. Each of the plurality of nozzle chambers are assigned to different layers, and at least one of the plurality of nozzle chambers has a length in a flow direction that is different from a length of at least one other of the plurality of nozzle chambers. 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: ApplicationFiled: March 26, 2003Publication date: October 2, 2003Applicant: VOITH PAPER PATENT GMBHInventors: Mathias Schwaner, Jurgen Proessl
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Publication number: 20030178167Abstract: 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: ApplicationFiled: May 27, 2003Publication date: September 25, 2003Inventors: Keiichi Fujiki, Tetsuo Makino, Akimine Izawa
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Publication number: 20030159790Abstract: 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: ApplicationFiled: February 26, 2003Publication date: August 28, 2003Applicant: VOITH PAPER PATENT GMBHInventors: Wolfgang Ruf, Hans Loser
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Publication number: 20030155093Abstract: The invention concerns a method for fluidisation of a pulp flow in the headbox of a paper machine or such. The characteristics of the pulp flow are affected in the headbox's fluidiser (14) in one step only, whereby the height (h1) of the step is at least equal to the average fibre length, and after the fluidiser (14) the biggest permissible step expansion in the flow channel in direction z is smaller than the average fibre length.Type: ApplicationFiled: April 8, 2003Publication date: August 21, 2003Inventors: Hannu Lepomaki, Hannu Karema, Markku Kellomaki, Maarit Tukiainen
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Patent number: 6605186Abstract: A headbox for use in a water felting process includes a housing and two rotating horizontal distribution rolls. The housing has curved sections shaped to conform to the outer cylindrical surface of the distribution rolls, wherein the curved section is closely spaced to a portion of the outer cylindrical surface of both distribution rolls.Type: GrantFiled: May 17, 2002Date of Patent: August 12, 2003Assignee: United States Gypsum CompanyInventor: David Paul Miller
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Publication number: 20030106660Abstract: 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: ApplicationFiled: July 16, 2002Publication date: June 12, 2003Inventors: Lasse Bjorkstedt, Jouni Matula
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Publication number: 20030106661Abstract: 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: ApplicationFiled: December 9, 2002Publication date: June 12, 2003Inventors: Hannu Lepomaki, Juhani Sams
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Patent number: 6544387Abstract: 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 turbulence generator and through pipes in the turbulence generator into a slice cone to be discharged therefrom onto a forming wire. The multi-layer headbox includes distribution valves for regulating the flow of dilution water across the width of the headbox. Each distribution valve communicates with a distribution plate placed in connection with the tube bank. From each valve, the dilution liquid is distributed at the same time to all the stocks that form the different layers of the web in the multi-layer headbox at a specific position of width of the multi-layer headbox.Type: GrantFiled: November 25, 1997Date of Patent: April 8, 2003Inventors: Jyrki Huovila, Juha Kinnunen, Ari Linsuri, Petri Nyberg
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Publication number: 20030056918Abstract: 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: ApplicationFiled: October 9, 2002Publication date: March 27, 2003Inventors: Jari P. Hamalainen, Hannu Lepomaki, Juhana Lumiala, Pasi Sirvio
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Publication number: 20030051844Abstract: 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: ApplicationFiled: July 24, 2002Publication date: March 20, 2003Applicant: Institute of Paper Science and Technology, Inc.Inventor: Cyrus K. Aidun
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Publication number: 20030024673Abstract: 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: ApplicationFiled: July 22, 2002Publication date: February 6, 2003Inventors: Roy Van Essen, Mark Landry, Richard Pitt
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Publication number: 20020195219Abstract: 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: ApplicationFiled: June 25, 2002Publication date: December 26, 2002Inventors: James G. Doyle, Gerhard Luettich
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Patent number: 6494993Abstract: The invention concerns multi-layer web formation by means of a simple basic-stock system and in particular a method for regulation of the properties of the different layers in a stock system that comprises several layers by means of additional stocks. The source (M) of basic stock is divided into 2 . . . n separate component flows (M1 . . . Mn), with which additional stocks (B1 . . . Bn) are mixed so as to form homogeneous mixtures with the basic stock, and the homogeneous stock flows are passed further by means of pumps (A1 . . . An) through machine screens (s1 . . . Sn) into the inlet header of a multi-layer headbox (P).Type: GrantFiled: April 27, 2001Date of Patent: December 17, 2002Assignee: Metso Paper, Inc.Inventor: Antti Suonperä
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Patent number: 6475344Abstract: 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: GrantFiled: April 12, 2002Date of Patent: November 5, 2002Assignee: Institue of Paper Science and Technology, Inc.Inventor: Cyrus K. Aidun
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Publication number: 20020153113Abstract: Lamella of a headbox through which at least one fibrous suspension flows. The headbox has a machine-width headbox nozzle with a nozzle length and an exit opening, and the headbox nozzle is delimited by an upper nozzle wall and a lower nozzle wall. The lamella, which is structured and arranged to be mounted within the headbox nozzle, includes a lamella body having a downstream Lamella end structured and arranged to be positioned downstream, relative to a suspension flow direction, of an opposite end of the lamella body, and the downstream lamella end includes a first surface, a portion coupled to an sloped relative to the first surface, and a second surface, located opposite the first surface, provided with a structure.Type: ApplicationFiled: February 12, 2002Publication date: October 24, 2002Applicant: VOITH PAPER PATENT GmbHInventors: Wolfgang Ruf, Konstantin Fenkl, Hans Loser
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Publication number: 20020148585Abstract: 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: ApplicationFiled: April 12, 2002Publication date: October 17, 2002Applicant: Institute of Paper Science and Technology, Inc.Inventor: Cyrus K. Aidun
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Publication number: 20020148586Abstract: A headbox for use in a water felting process includes a housing and two rotating horizontal distribution rolls. The housing has curved sections shaped to conform to the outer cylindrical surface of the distribution rolls, wherein the curved section is closely spaced to a portion of the outer cylindrical surface of both distribution rolls.Type: ApplicationFiled: May 17, 2002Publication date: October 17, 2002Applicant: United States Gypsum CompanyInventor: David Paul Miller
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Headbox and process for the metered addition of a fluid medium into a suspension stream of a headbox
Patent number: 6464837Abstract: 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 turbulence-producing conduit having an entrance, a graduated pressure loss area, and an exit. A total pressure loss &Dgr;Ptotal is caused in the at least one turbulence-producing conduit such that the total pressure loss &Dgr;Ptotal includes at least one intake pressure loss &Dgr;Pintake formed at the entrance and a graduated pressure loss &Dgr;Pgrad formed at the graduated pressure loss area. A metered addition of a fluid medium is also provided in a region between the entrance and the exit.Type: GrantFiled: February 3, 2000Date of Patent: October 15, 2002Assignee: Voith Sulzer Papiertechnik Patent GmbHInventors: Wolfgang Ruf, Hans Loser, Klaus Lehleiter -
Patent number: 6461479Abstract: 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: GrantFiled: May 10, 1999Date of Patent: October 8, 2002Assignee: Ádritz-Patentverwaltungs-Gesellschaft m.b.H.Inventors: Franz Petschaurer, Reinhard Pinter, Adolf Engler
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Patent number: 6451167Abstract: 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: GrantFiled: April 26, 2000Date of Patent: September 17, 2002Assignee: Virginia Tech Foundation, Inc.Inventor: Stephen P. Scheinberg
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Publication number: 20020121354Abstract: 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: ApplicationFiled: February 27, 2002Publication date: September 5, 2002Inventor: Cyrus K. Aidun
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Patent number: 6413376Abstract: A headbox for use in a water felting process includes a housing and two rotating horizontal distribution rolls. The housing has curved sections shaped to conform to the outer cylindrical surface of the distribution rolls, wherein the curved section is closely spaced to a portion of the outer cylindrical surface of both distribution rolls.Type: GrantFiled: May 16, 2000Date of Patent: July 2, 2002Assignee: United States Gypsum CompanyInventor: David Paul Miller
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Publication number: 20020074100Abstract: The present invention is a through-air-drying process for producing a fibrous web that possesses not only softness and absorbency but also strength. The method of the present invention monitors and controls the overall charge in the headbox.Type: ApplicationFiled: December 20, 2001Publication date: June 20, 2002Applicant: James River CorporationInventors: Kang Chang Yeh, Gary L. Worry, Thomas N. Kershaw, Henry S. Ostrowski
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Patent number: 6406595Abstract: 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: GrantFiled: August 25, 2000Date of Patent: June 18, 2002Assignee: Institute of Paper Science and Technology, Inc.Inventor: Cyrus K. Aidun
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Publication number: 20020043355Abstract: Lamella and headbox of a web production machine. The lamella is formed of at least one high-performance polymer. The at least one high-performance polymer includes high stability, high heat resistance, and good to very good resistance to at least one of alkaline solution and acid. The headbox includes the lamella.Type: ApplicationFiled: October 17, 2001Publication date: April 18, 2002Applicant: VOITH PAPER PATENT GMBHInventors: Wolfgang Ruf, Hans Loser
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Patent number: 6372092Abstract: Headbox of a paper machine and a process of supplying a material suspension, The headbox includes at least one material suspension supplying system, and a headbox nozzle that includes a first dividing wall having a machine width and a second dividing wall having a machine width. The first and second dividing walls are arranged to form a first path in which a total nozzle cross-section steadily and continually decreases in a material flow direction and to form a second path, arranged to follow the first path, in which a total nozzle cross-section continually increases in the material flow direction. The process includes includes accelerating the material suspension along a first path having a total nozzle cross-section that steadily and continually decreases in a material flow direction, and decelerating the material suspension along a second path having a total nozzle cross-section that continually increases in the material flow direction. The second path is arranged to follow the first path.Type: GrantFiled: January 5, 2000Date of Patent: April 16, 2002Assignee: Voith Sulzer Papiertechnik Patent GmbHInventors: Alfred Bubik, Joachim Henssler, Jürgen Prössl, Karl Müller, Walter Holzer, Mathias Schwaner