Pressure Forming Patents (Class 162/214)
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Patent number: 7241364Abstract: A web of tissue is formed in a twin wire former, followed by an air press for water removal in the pressing section, passing onto a Yankee dryer. A headbox injects stock between upper and lower dryer fabrics brought together on a breast roll. The fabrics moves over vacuum boxes, and the web is heated with steam and passed between an upper pressure box and a lower vacuum box forming an air press which dewaters the web. A sheet transfer pickup vacuum box holds the sheet to the upper fabric as the lower fabric diverges from the upper fabric. A pressure roller transfers the web onto a Yankee dryer. The fabrics are cleaned on vertical runs before returning to the breast roll. A final forming fabric is arranged to operated at a lower speed than the penultimate forming fabric so that a rush transfer and creping like action takes place.Type: GrantFiled: March 7, 2005Date of Patent: July 10, 2007Assignees: Metso Paper, Inc., Mitsubishi Heavy Industries, Ltd.Inventors: Roger A. Kanitz, Thomas D. Rogers
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Patent number: 6890407Abstract: A method and an arrangement for manufacturing calendered paper or board particularly in the on-line manufacturing method. In the method, a base web is formed from a mixture of water and pulp supplied from the headbox and the web is dried by removing water over the press section and over the dryer section by heating. The formed web is calendered at least once to modify the surface on at least one of its sides. Before calendering the cross-direction thickness profile of the web is standardized and calendering is carried out by means of a long-nip calender, whereby good surface quality is obtained without losing the bulk or stiffness of the web.Type: GrantFiled: May 15, 2000Date of Patent: May 10, 2005Assignee: Metso Paper, Inc.Inventors: Pekka Koivukunnas, Matti Lares, Mika Leino
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Patent number: 6875311Abstract: A method and an arrangement for manufacturing calendered paper or board particularly in the on-line manufacturing method. In the method, a base web is formed from a mixture of water and pulp supplied from the headbox and the web is dried by removing water over the press section and over the dryer section by heating. The formed web is calendered at least once to modify the surface on at least one of its sides. Before calendering the cross-direction thickness profile of the web is standardized and calendering is carried out by means of a long-nip calender, whereby good surface quality is obtained without losing the bulk or stiffness of the web.Type: GrantFiled: October 10, 2003Date of Patent: April 5, 2005Assignee: Metso Paper, Inc.Inventors: Pekka Koivukunnas, Matti Lares, Mika Leino
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Patent number: 6863777Abstract: A web of tissue is formed in a twin wire former, followed by an air press for water removal in the pressing section, passing onto a Yankee dryer. A headbox injects stock between upper and lower dryer fabrics brought together on a breast roll. The fabrics move over vacuum boxes, and the web is heated with steam and passed between an upper pressure box and a lower vacuum box forming an air press which dewaters the web. A sheet transfer pickup vacuum box holds the sheet to the upper fabric as the lower fabric diverges from the upper fabric. A pressure roller transfers the web onto a Yankee dryer. The fabrics are cleaned on vertical runs before returning to the breast roll.Type: GrantFiled: May 30, 2003Date of Patent: March 8, 2005Assignees: Metso Paper, Inc., Mitsubishi Heavy Industries, Ltd.Inventors: Roger A. Kanitz, Thomas D. Rogers
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Patent number: 6706151Abstract: 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: GrantFiled: January 28, 2002Date of Patent: March 16, 2004Assignee: Southern Pulp Machinery (PTY) LimitedInventors: Johan Jacob Oosthuizen, Jonathan David Taljaard
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Patent number: 6613194Abstract: A web of tissue is formed in a twin wire former, followed by an air press for water removal in the pressing section, passing onto a Yankee dryer. A headbox injects stock between upper and lower dryer fabrics brought together on a breast roll. The fabrics move over vacuum boxes, and the web is heated with steam and passed between an upper pressure box and a lower vacuum box forming an air press which dewaters the web. A sheet transfer pickup vacuum box holds the sheet to the upper fabric as the lower fabric diverges from the upper fabric. A pressure roller transfers the web onto a Yankee dryer. The fabrics are cleaned on vertical runs before returning to the breast roll.Type: GrantFiled: September 30, 2002Date of Patent: September 2, 2003Assignees: Metso Paper, Inc., Mitsubishi Heavy Industries, Ltd.Inventors: Roger A. Kanitz, Thomas D. Rogers
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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: 6458246Abstract: A web of tissue is formed in a crescent former, followed by an air press for water removal in the pressing section, passing onto a Yankee dryer. A headbox injects stock between upper and lower dryer fabrics brought together on a breast roll. The fabrics move over vacuum boxes, and the web is heated with steam and passed between an upper pressure box and a lower vacuum box forming an air press which dewaters the web. A sheet transfer pickup vacuum box holds the sheet to the upper fabric as the lower fabric diverges from the upper fabric. A pressure roller transfers the web onto a Yankee dryer. The fabrics are cleaned on vertical runs before returning to the breast roll. A second upper fabric or transfer fabric operating at a lower speed then the first can be used to form a rush transfer between the forming fabrics and the Yankee dryer which increases web bulk and absorbency. Instead of a second fabric, a vacuum pressure roll may perform the rush transfer between the lower forming fabric and the Yankee dryer.Type: GrantFiled: April 3, 2001Date of Patent: October 1, 2002Assignees: Metso Paper, Inc., Mitsubishi Heavy Industries, Ltd.Inventors: Roger A. Kanitz, Thomas D. Rogers
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Patent number: 6419793Abstract: 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: GrantFiled: August 31, 2000Date of Patent: July 16, 2002Assignee: Voith Sulzer Papiertechnik Patent GmbHInventor: David A. Beck
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Patent number: 6342125Abstract: 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: GrantFiled: April 13, 2000Date of Patent: January 29, 2002Inventor: Bengt Nordström
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Patent number: 6231723Abstract: A web of tissue is formed in a crescent former, followed by an air press for water removal in the pressing section, passing onto a Yankee dryer. A headbox injects stock between upper and lower dryer fabrics brought together on a breast roll. The fabrics move over vacuum boxes, and the web is heated with steam and passed between an upper pressure box and a lower vacuum box forming an air press which dewaters the web. A sheet transfer pickup vacuum box holds the sheet to the upper fabric as the lower fabric diverges from the upper fabric. A pressure roller transfers the web onto a Yankee dryer. The fabrics are cleaned on vertical runs before returning to the breast roll. A second upper fabric or transfer fabric operating at a lower speed then the first can be used to form a rush transfer between the forming fabrics and the Yankee dryer which increases web bulk and absorbency. Instead of a second fabric, a vacuum pressure roll may perform the rush transfer between the lower forming fabric and the Yankee dryer.Type: GrantFiled: June 2, 1999Date of Patent: May 15, 2001Assignee: Beloit Technologies, IncInventors: Roger A. Kanitz, Thomas D. Rogers
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Patent number: 5800766Abstract: The present invention relates to a method of compacting a plurality of flat, stacked, non-woven cotton and cotton blend articles from a normal size to a greatly reduced size to form a package of such articles that saves exterior packaging, shipping, handling and warehouse costs. The pressure and time dwell are selected to compact the stacked articles to the extent necessary to cause the desired size reduction, but not sufficient to either damage the articles or compact them to the degree that a liquid or other means is required to recover them from their compacted to their original size.Type: GrantFiled: March 4, 1997Date of Patent: September 1, 1998Inventor: Wayne M. Merry
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Patent number: 5160584Abstract: A papermaking machine is constructed as a barrier former in which a fiber slurry is received and placed in turbulence on one side of the screen plate for fluidizing the slurry and distributed through the screen plate onto a collecting wire, under tension, for immediately starting dewatering of a web formed in a wedge-shaped forming zone between the screen plate and the wire.Type: GrantFiled: May 28, 1991Date of Patent: November 3, 1992Assignee: Beloit Technologies, Inc.Inventor: Borje Fredriksson
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Patent number: 5160583Abstract: In a papermaking machine, a method and mechanism for delivering stock to a dewatering web including a pressure headbox with a narrowing slice opening, a receiving throat either with a single traveling forming wire or a pair of traveling forming wires, bridging the space between the headbox opening and the wire so that the stock jet is contained without a free surface, and applying a trailing flexible element opposite the stock in a single wire machine or against one wire in a twin wire machine with the force and location of the trailing element controlled by a series of push rods arranged parallel in a cross machine direction.Type: GrantFiled: December 2, 1991Date of Patent: November 3, 1992Assignee: Beloit CorporationInventors: Daniel J. Eaton, Roger A. Kanitz
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Extended flexible headbox slice with parallel flexible lip extensions and extended internal dividers
Patent number: 5129988Abstract: The uniformity of layered paper sheets produced using a layered headbox can be improved by confining the outer layers between parallel surfaces within the headbox immediately prior to leaving the headbox.Type: GrantFiled: June 21, 1991Date of Patent: July 14, 1992Assignee: Kimberly-Clark CorporationInventor: Theodore E. Farrington, Jr. -
Patent number: 4995988Abstract: Method and drum filter for thickening of slurry and for treatment of the slurry with liquid. The slurry to be thickened is passed onto the filter face of a drum (3) revolving in a basin (3), and the treatment liquid is passed through the pulp web formed on the drum. The consistency of the pulp web is increased by pressing a compression plate (10) against the pulp web. The compression force of the compression plate (10) is produced by means of the pressure of a liquid and/or gas passed to the convex side of the plate. The compression force can be adjusted by adjusting the pressure prevailing in the gas space outside the drum (3).Type: GrantFiled: December 14, 1988Date of Patent: February 26, 1991Assignee: Sunds Defibrator Rauma OyInventor: Aaro Ahlgren
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Patent number: 4430159Abstract: A twin-wire papermaking machine contains a region having two wires guided in mutual contact with one another and at which there is located at least one stock infeed device. The stock infeed device possesses the form of a box or cabinet member having an open side along which move both of the wires. Within the stock infeed device there is located a fibrous stock suspension suitable for the fabrication of paper and which is at an excess pressure in relation to the atmosphere. At the side of the wires facing away from the stock infeed device there can be arranged a suction device.Type: GrantFiled: April 9, 1982Date of Patent: February 7, 1984Assignee: Escher Wyss LimitedInventors: Alfred Bubik, Siegfried Reutter
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Patent number: 4349414Abstract: A method for forming a multilayer jet by delivering a plurality of superposed, spaced apart jets of stock through a slice opening towards a web forming zone, keeping the jets separated for part of the distance between the slice opening and the forming zone, and thereafter, but not later than the arrival of the jets at the forming zone, allowing the jets to come into direct contact to produce a stratified jet. Separation of the jets in this fashion is effected by forming and maintaining gaseous wedges in the spaces between them after delivery through the slice opening.Type: GrantFiled: September 23, 1981Date of Patent: September 14, 1982Assignee: AB Karlstads Mekaniska WerkstadInventor: Erik G. Stenberg
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Patent number: 4125429Abstract: Turbulence is generated within a headbox nozzle passage in such close adjacency to the slice opening as to assure thorough and substantially uniform dispersion of the fibers in a jet stream delivered to the forming area on a travelling paper web forming surface. Substantial suppression of turbulence in the jet stream is effected without interferring with the substantial uniformity of fiber dispersion in the suspension as delivered to the forming surface.Type: GrantFiled: March 8, 1977Date of Patent: November 14, 1978Assignee: Beloit CorporationInventors: Richard E. Hergert, Charles L. Sanford
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Patent number: 4045281Abstract: A method for preventing web rewetting in a paper making machine of the type comprising a forming cylinder with an apertured or perforated periphery, with or without a foraminous belt wrapped around the cylinder, on which cylinder there is formed, during rotation of the cylinder, a paper web by a pressure slice to which paper slurry or stock is supplied, the paper web remaining on the periphery of the cylinder or belt over a major portion thereof, while water is drawn from the web by means of one or more suction boxes located within the cylinder and extending from the pressure slice to a transfer zone where the web is transferred from the cylinder or belt onto a felt or wire cloth for subsequent processing. In the remainder of the paper making machine there is provided a suction box extending over an arc from said web transfer zone to the area of said pressure slice to prevent rewetting of the withdrawn web.Type: GrantFiled: July 28, 1975Date of Patent: August 30, 1977Assignee: Sulzer Bros. (U.K.) LimitedInventor: Eberhard Wassermann
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Patent number: 4024016Abstract: A former for cylinder mold, paper making, machines, of the type now known as B.R.D.A., and having a pressure lid, an explosion chamber with a central imperforate baffle, and a manifold feeding stock to the chamber is characterized by the flow box unitarily containing an explosion chamber separated from a tapered manifold by an apertured plate. Stock is directed from the plate apertures in a direction normal to the baffle for improved mixing. The pressure lid includes a forward cantilevered tip end with a predetermined tip clearance, and is unusually elongated to increase drainage effect. The lower plate of the slice is rubber with an inner bulb and it is slidable axially outward for replacement. The curvature and clearances of the lid are changeable during operation and the lid acts as an adjustable gate for controlling pooling under the lid.Type: GrantFiled: December 18, 1975Date of Patent: May 17, 1977Assignee: J. H. Horne & Sons, Inc.Inventors: John Herbert Gordon, Frank A. Duchnowski
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Patent number: 4021296Abstract: A method and device for manufacturing a continuous material of elongated fibrous particles from a suspension of the fibrous articles with a concentration at least twice as high as the sediment concentration of the fibrous particles, in which the highly concentrated suspension is distributed and deflected in a chamber before the suspension is passed to a decay channel from which the suspension is deposited, is disclosed wherein the suspension is exposed in an intermediate forming channel between the chamber and the outlet channel to a plurality of changes of direction to change the direction which in turn contributes to the local variations of the fibre concentration in the suspension becoming more even.Type: GrantFiled: November 7, 1974Date of Patent: May 3, 1977Assignee: A. Ahlstrom OsakeyhtioInventor: Per Lennart Reiner