Heating, Cooling, Gas Or Vapor Contact Patents (Class 162/207)
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Patent number: 6200425Abstract: In a tissue machine, a roll is arranged to press a paper web against a Yankee cylinder. A steam box is arranged in connection with the roll. A steaming area of the steam box is arranged against the paper web substantially above the horizontal center line of the roll.Type: GrantFiled: April 20, 1999Date of Patent: March 13, 2001Assignee: Neles Paper Automation OyInventor: Kari Pellinen
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Patent number: 6200424Abstract: An arrangement and method for calendering a board web including a calender providing a hot and hard calendering nip formed by two calender rolls and through which the board web passes. At least one of the calender rolls is arranged to be heated to such a temperature that the surface layer of the board web placed at the side of this roll reaches its vitrification temperature in the calendering nip. A film press is arranged directly before the calendering nip in the direction of transfer of the board web and includes a film press nip through which the board web is passed. The film press nip is arranged to transfer a liquid layer onto the face of the board web so as to moisten the board web. The board web is transferred from the film press nip into the calendering nip while the surface layer of the web is at the moisture level determined by the film press in view of producing a controlled moisture gradient.Type: GrantFiled: July 16, 1997Date of Patent: March 13, 2001Assignee: Valmet CorporationInventors: Juhani Saari, Stefan Kuni
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Patent number: 6187137Abstract: A method of using a conventional wet-pressed creped tissue machine produces a textured tissue sheet that is dried on a conventional cylindrical drum dryer to create an uncreped product with throughdried-like properties. Machine modifications and a proper balance of adhesive compounds and release agents permit a textured sheet to be dried on a Yankee drier and then pulled off without use of a crepe blade.Type: GrantFiled: October 31, 1997Date of Patent: February 13, 2001Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Frank Gerald Druecke, Shan Liang Chen, Michael Alan Hermans, Sheng-Hsin Hu, Richard Joseph Kamps
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Patent number: 6149767Abstract: An uncreped tissue sheet having improved softness results from supplementally dewatering a wet web to a consistency of greater than about 30 percent using noncompressive dewatering techniques prior to a differential speed transfer and subsequent throughdrying. An air press particularly well suited for providing the supplemental noncompressive dewatering incorporates side and/or end seals to minimize escape of pressurized fluid. A creped tissue sheet can be produced with a variety of manufacturing benefits using the air press.Type: GrantFiled: October 31, 1997Date of Patent: November 21, 2000Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Michael Alan Hermans, Mark Alan Burazin, Frank Stephen Hada, Sung Ho Hong
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Patent number: 6148538Abstract: Condensation device and suction element including a condensation device for machines for manufacturing and refining a fibrous material web. The condensation device includes at least one condensation element positioned in a region of at least one of steam formation and accumulation and a condensate receptacle. The suction element includes a hollow body coupled to a vacuum source. The hollow body is adapted to guide a transport belt carrying a moist and heated web. The suction element also includes at least one opening positioned to face the transport belt, at least one condensation element, and at least one condensate receptacle. The at least one condensation element and the at least one condensate receptacle are positioned within the hollow body.Type: GrantFiled: August 5, 1998Date of Patent: November 21, 2000Assignee: Voith Sulzer Papiermaschinen GmbHInventors: Karl Steiner, Markus Oechsle
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Patent number: 6139686Abstract: A process and an apparatus for making a foreshortened paper web are disclosed. A wet web disposed on a fluid-permeable papermaking fabric is being pressed between two parallel and mutually opposed first and second press surfaces, the first press surface contacting the web, and the second press surface contacting the fabric. In the continuous process, the press surfaces, the web and the fabric move in a machine direction. Under pressure, at least selected portions of the web become densified and adhered to the first press surface which can be treated with a creping adhesive. The first surface is heated to create a temperature differential between two surfaces. The temperature differential causes the water contained in the web to move from the web into the fabric, thereby drying the web. After the web is released from the pressure, the web is foreshortened either by creping or by transferring the web to a slower moving transfer fabric.Type: GrantFiled: December 19, 1997Date of Patent: October 31, 2000Assignee: The Procter & Gamble CompanyInventors: Paul Dennis Trokhan, Mark Ryan Richards, Michael Gomer Stelljes, Jr.
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Patent number: 6136147Abstract: Debonders, particularly including polysiloxanes, are applied to tissue webs by atomizing the debonder and applying the debonder to the tissue with a steam jet as a debonder/steam mixture. The debonder is applied after the creping blade and prior to the reel. Other suitable debonders include quaternary ammonium surfactants.Type: GrantFiled: August 1, 1994Date of Patent: October 24, 2000Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Steven Lawrence Edwards, Michael John Smith
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Patent number: 6101735Abstract: A dryer section of a paper machine including groups with single-wire draw that include a drying wire guided in a loop and reversing cylinders arranged in the drying-wire loop. Contact drying cylinders are arranged in gaps between the reversing cylinder and the drying wire is guided to press a web against heated faces of the contact drying cylinders. In addition to normal, small-diameter contact drying cylinders, one or more large-diameter contact drying cylinders (the diameter being greater than about 2200 mm and usually in a range from 2200 mm to 3600 mm), is/are used in one or more single-wire draw groups. An impingement-drying/ventilation hood is arranged above the large-diameter contact drying cylinders and extends on a large sector above the contact drying cylinder and above the drying wire and the web running over the cylinder. An impingement-drying/ventilation effect is applied to the drying wire through the impingement-drying/ventilation hoods on the large sector.Type: GrantFiled: April 22, 1998Date of Patent: August 15, 2000Assignee: Valmet CorporationInventors: Antti Kuhasalo, Hans Sundqvist
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Patent number: 6096169Abstract: A noncompressive dewatering device generates air streams that can be used to remove water from cellulosic webs in an energy efficient manner. Further, a wet-pressed machine can be modified to economically produce low-density tissue with an energy/capital efficiency greater than that of the throughdrying process. For instance, a cellulosic web can be non-compressively dewatered from a post forming consistency to a consistency from about 25 percent to the water retention consistency by passing air through the web with an Energy Efficiency at least 10 percent greater than that achievable using vacuum dewatering at the same speed.Type: GrantFiled: October 31, 1997Date of Patent: August 1, 2000Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Michael Alan Hermans, Sherry Lynn Behnke, Robert Irving Gusky, Frank Stephen Hada
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Patent number: 6093284Abstract: An air press for noncompressively dewatering a wet web to consistency levels not previously thought possible at industrially useful speeds without thermal dewatering.Type: GrantFiled: April 23, 1999Date of Patent: July 25, 2000Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Frank Stephen Hada, Michael Alan Hermans, Brian Wade Isenhart, Lowell Everett Thoms, Charles Robert Tomsovic
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Patent number: 6090243Abstract: Improved method of removing water from a wet web of paper includes the steps of (a) passing the web and its supporting fabric above and in sliding contact with a surface of a meniscus separator unit having a plurality of spaced cells in contact with the inner surface of the fabric; (b) applying a small vacuum to an internal space of each cell to extract water from the web using the tension meniscus of water while preventing air from passing through the web; and (c) permitting air from the atmosphere only to be applied to the inner surface of the fabric by each cell and thence into the fabric to replace water removed from the fabric in step (b) thereby enhancing the removal of water from the web and from the fabric, the atmospheric air passing along and through the interstices between the inner and outer surfaces of the fabric to the internal space of each cell.Type: GrantFiled: June 4, 1997Date of Patent: July 18, 2000Inventors: Glauco Corbellini, Peter A. Rodriguez
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Patent number: 6090241Abstract: A process and an apparatus for making a differential density cellulosic web comprising a first plurality of high-density micro-regions and a second plurality of low-density micro-regions are disclosed. The process comprises the steps of providing a fibrous web containing fluid-latent indigenous polymers and water; depositing the web on a fluid-permeable molding fabric; applying ultrasonic energy to the web, thereby contributing to softening of the fluid-latent indigenous polymers in at least selected portions of the web; impressing the molding fabric into the web, thereby densifying the selected portions of the web and causing the fluid-latent indigenous polymers to flow and interconnect the fibers which are mutually juxtaposed in the selected portions; and immobilizing the fluid-latent indigenous polymers, thereby creating bonds thereof between the fibers which are interconnected in the selected portions.Type: GrantFiled: April 23, 1998Date of Patent: July 18, 2000Assignee: The Procter & Gamble CompanyInventors: Paul Dennis Trokhan, Nagabhusan Senapati
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Patent number: 6083346Abstract: A tissue sheet is made using a modified wet pressing process employing an integrally sealed air press. After initial formation and conventional vacuum dewatering, the wet web is conformed to the surface contour of a relatively coarse fabric to give the web a textured surface. By creating a pressure differential across the web of at least 30 inches of mercury and an air stream through the web of at least 500 SCFM/in.sup.2, the air press noncompressively dewaters the wet web to a consistency of about 30 to about 40 percent prior to a Yankee dryer. The web is dried to substantially preserve its three-dimensional, throughdried-like texture. The resulting web has an exceptionally high degree of bulk and absorbency not previously found in wet-pressed products.Type: GrantFiled: October 31, 1997Date of Patent: July 4, 2000Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Michael Alan Hermans, Shan Liang-Chen, Fung-jou Chen, Frank Gerald Druecke, Robert Irving Gusky, Frank Stephen Hada, Richard Joseph Kamps, Charles Robert Tomsovic
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Patent number: 6074525Abstract: A process for increasing bulk of a foreshortened fibrous web comprises adding moisture to at least the web's selected portions, thereby causing the crepe in the selected portions to relax and the selected portions to expand, while retaining the crepe in the rest of the web. A preferred apparatus comprises a pair of opposite surfaces, at least one of which having expansion conduits therethrough, the web being impressed between the surfaces. A temperature differential is created between the two opposite surfaces, sufficient to drive the moisture added to the selected portions therethrough, thus relaxing crepe in the selected portions which expand into the expansion conduits, while the crepe is retained in the rest of the web impressed between the two surfaces.Type: GrantFiled: May 18, 1998Date of Patent: June 13, 2000Assignee: The Procter & Gamble CompanyInventor: Mark R. Richards
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Patent number: 6073549Abstract: A process and an apparatus for the manufacture of SC-A paper having a high gloss and high smoothness, wherein the paper arriving from the paper machine is supplied on-line to a supercalender (multinip soft calender), and wherein the paper travels through a plurality of nips for achieving the desired gloss and smoothness properties. The paper web arriving from the paper machine and supplied on-line to a supercalender (multinip soft calender) is moistened with steam immediately prior to the first nip of the supercalender and is guided through the first nip before the increased moisture of the surface resulting from the application of steam has dropped below a predetermined value in the range of 12% to 25%.Type: GrantFiled: August 27, 1998Date of Patent: June 13, 2000Assignee: V.I.B. Apparatebau GmbHInventors: Stefan Winheim, Rudolf Mann
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Patent number: 6042692Abstract: A paper machine for manufacturing a web of soft crepe paper comprises a wet end (1) having at least one forming wire (4) for forming and supporting a web (7), and a drying section (2) with a through drying machine (13), a drying cylinder (17) and a perforated belt (19) running around a through-blow cylinder of the through drying machine and a transfer roll (21) at the drying cylinder, the web running through the through drying machine being exposed to drying air after its transfer from the forming wire. The belt (19) and the web (7) move from the through drying machine (13) to the drying cylinder (17) in a run that is free from mechanical means which would compress the web, whereby in said run the surface of the web which is exposed to the drying air faces away from the belt and remains free from contact with such means up to the drying cylinder.Type: GrantFiled: July 8, 1996Date of Patent: March 28, 2000Assignee: Valmet-Karlstad ABInventor: Harry Ingemar Myren
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Patent number: 6024836Abstract: A process and device for producing a pulp web utilizes several independently driven aggregates (i.e., discrete groups) to attain a median web dry content of, e.g., 60%. The number of driven aggregates may depend upon an initial wet strength of the wet pulp web. The relationship is such that when the initial wet strength is relatively high, the number of drier groups is small and when the initial wet strength is relatively low, the number of drier groups is large. However, each drier group includes only a few drier cylinders. The first drier group may include either one or two cylinders, and each subsequent drier group may include at least one drier cylinder more than the adjacent upstream drier group.Type: GrantFiled: December 20, 1996Date of Patent: February 15, 2000Assignee: Voith Sulzer Papiermaschinen GmbHInventors: Hans-Peter Sollinger, Markus Oechsle
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Patent number: 6022448Abstract: The present invention relates to coated paperboard for formed articles, which paperboard consists of a fibermatrix in one, two or more layers and a coating and has adequate surface for printing and adequate surface gloss for each specific type of formed articles. The paperboard has been calendered after coating with a heatable calender having a soft extended nip, and has reduced density and reduced grammage at a given value for bending force compared to corresponding coated paperboard which has been calendered before or during and after coating with a heatable or non-heatable calender having a hard or soft nip. Additionally, a production line for the production of such coated paperboard, a process for the production of such coated paperboard, and a method of reducing the susceptibility to crack formation at folding of such a coated paperboard, are described.Type: GrantFiled: October 10, 1997Date of Patent: February 8, 2000Assignee: Korsnab ABInventors: Goran Eriksson, Klas-Erik Karlsson, Nils .ANG.ke Larsson, Sven H.ang.kansson
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Patent number: 6014818Abstract: Apparatus for drying a pulp web includes a plurality of jet boxes, arranged vertically in piles parallel with each other, and provided with openings through which heated air, introduced into the jet boxes, can stream out. The pulp web is conducted in an essentially vertical direction between the piles of adjacent jet boxes and around upper and lower turning rolls for bringing the pulp web upwards and downwards through the apparatus; heating air streaming out of holes in the jet boxes towards the progressing pulp web; irradiating essentially all that portion of the pulp web which momentarily is between the upper and the lower turning rolls, on both sides with the heated air.Type: GrantFiled: September 15, 1997Date of Patent: January 18, 2000Inventor: Sture Kristrom
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Patent number: 6004430Abstract: A method and device for enhancing the run of a web in a paper machine in which water is removed from the web by pressing the web in at least one press nip and after pressing, the web is dried in at least one dryer group applying impingement drying. The web is guided along a substantially linear path or by using a large curve radius in the dryer group applying impingement drying. In the drying stage, after the impingement drying, the web is dried in at least one dryer group having normal single-wire draw. The web is passed from the pressing stage to the drying stage as a closed draw and more particularly, from the pressing stage to the area with single-wire draw in the drying stage so that the web is constantly supported against at least one support face.Type: GrantFiled: August 27, 1998Date of Patent: December 21, 1999Inventors: Heikki Ilvespaa, Juha Kaihovirta, Antti Kuhasalo, Jorma Laapotti
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Patent number: 5967958Abstract: A heatable roller which can be heated from inside the roller body by a heating device. Provided radially outside the heating device are axially parallel bore holes uniformly distributed over the periphery of the roller body which are connected at the ends by annular chambers. The bore holes and the annular chambers form a closed system which is partially filled with water. This system operates to make the temperature uniform via condensation heating in the event of local temperature reduction.Type: GrantFiled: November 3, 1997Date of Patent: October 19, 1999Assignee: Eduard Kusters Maschinenfabrik GmbH & Co. KGInventors: Werner Borkenhagen, Peter Hader, Klaus Kubik
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Patent number: 5938893Abstract: A differential micro-regions single lamina fibrous web comprises at least two pluralities of micro-regions disposed in a non-random and repeating pattern: a first plurality of micro-regions comprising fibers interconnected with a fiber-bonding substance, and a second plurality of micro-regions, preferably not interconnected with the fiber-binding substance. The fiber-binding substance is selected from the group consisting of hemicelluloses, lignin, polymeric extractives, and any combination thereof. The fibers of the first plurality of micro-regions are bonded together by a process of softening, flowing, and immobilization of the fiber-binding substance between the cellulosic fibers.Type: GrantFiled: August 15, 1997Date of Patent: August 17, 1999Assignee: The Procter & Gamble CompanyInventors: Paul Dennis Trokhan, Mark Ryan Richards, Michael Gomer Stelljes, Jr.
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Patent number: 5935381Abstract: A differential density single lamina web of cellulosic fibers comprises at least two pluralities of micro-regions disposed in a non-random and repeating pattern: a first plurality of high density regions and a second plurality of low density regions. The high density regions comprise cellulosic fibers comprising fluid latent indigenous polymers (FLIP), such as hemicelluloses and lignin. The fibers of the high-density regions are FLIP-bonded, i.e., bonded together by a process of softening, flowing and immobilization of the FLIP between the cellulosic fibers of the high density regions.Type: GrantFiled: June 6, 1997Date of Patent: August 10, 1999Assignee: The Procter & Gamble CompanyInventors: Paul Dennis Trokhan, Mark Ryan Richards, Michael Gomer Stelljes, Jr.
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Patent number: 5914008Abstract: A process and device for increasing the gloss and/or smoothness of a web of material are described, whereby a web of material (5) is passed through a roller gap where it is exposed to pressure. A steam dispensing device (7) is provided upstream of the roller gap relative to the direction of travel (9) of the web of material (5). The increase in gloss and/or smoothness is to be accomplished without consuming much energy. To do so, the steam is condensed on the web of material and the web of material (5) is guided through the roller gap before the increase in moisture content of the surface due to the steam treatment has dropped below a predetermined value. The predetermined moisture content is in the range of 12% to 25%.Type: GrantFiled: October 21, 1996Date of Patent: June 22, 1999Assignee: V.I.B. Apparatebau GmbHInventor: Stefan H. Winheim
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Patent number: 5910231Abstract: A process for increasing the solvent resistance of calendered paper consisting of poly(p-phenylene terephthalamide) short fibers and poly(m-phenylene isophthalamide) fibrids and the dimensional stability of laminates made therefrom.Type: GrantFiled: July 22, 1997Date of Patent: June 8, 1999Assignee: E. I. du Pont de Nemours and CompanyInventors: Birol Kirayoglu, David Jeffrey Powell
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Patent number: 5891309Abstract: A web support foil positioned adjacent to a Yankee dryer above a creping doctor. The foil supports the web as it leaves the dryer. Mounted to the top of the foil is an adjustable air deflector which is positioned tangent to the Yankee dryer. The air deflector blocks air moving along the web. A slotted opening draws air from a leading-edge pocket collecting fibers which are broken loose during the creping action. The web is held against the bottom side of the foil by one or more air jets which are directed over the bottom surface on the foil. The jets of air function as coanda air jets and prevent the web from sticking to the bottom surface of the foil while creating a Bernoulli effect which holds the web against the bottom of the foil.Type: GrantFiled: August 26, 1997Date of Patent: April 6, 1999Assignee: Beloit Technologies, Inc.Inventors: Robert E. Page, Gerald J. Kramer, Dale A. Brown, David A. Smith
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Patent number: 5865955Abstract: A method and device for enhancing the run of a web in a paper machine in which water is removed from the web by pressing the web in at least one press nip and after pressing, the web is dried in at least one dryer group applying impingement drying. The web is guided along a substantially linear path or by using a large curve radius in the dryer group applying impingement drying. In the drying stage, after the impingement drying, the web is dried in at least one dryer group having normal single-wire draw. The web is passed from the pressing stage to the drying stage as a closed draw and more particularly, from the pressing stage to the area with single-wire draw in the drying stage so that the web is constantly supported against at least one support face.Type: GrantFiled: October 4, 1996Date of Patent: February 2, 1999Assignee: Valmet CorporationInventors: Heikki Ilvespaa, Juha Kaihovirta, Antti Kuhasalo, Jorma Laapotti
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Patent number: 5824191Abstract: The present invention provides a process for making a paper based product which comprises a paper sheet, an aqueous latex binder and a release agent comprised of an emulsion of lecithin and a fatty acid or derivative thereof. In one embodiment, the process comprises first preparing a slurry of a cellulosic pulp and a polymeric latex binder, and then breaking the stability of the latex so that the polymer particles of the latex are able to be deposited on the fibers of the cellulosic pulp. An emulsion comprised of lecithin and a fatty acid or derivative thereof is added during the process. The addition can be to the slurry, or to the web which is formed when the slurry is drained of liquid. The web is then dried to provide the paper based product. In a preferred embodiment, a slurry of cellulosic pulp is first drained of liquid to form a web, with the polymeric latex binder and emulsion being applied to the web prior to drying.Type: GrantFiled: March 28, 1997Date of Patent: October 20, 1998Assignee: FiberMark Filter & Technical Products, Inc.Inventor: Homan B. Kinsley, Jr.
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Patent number: 5800675Abstract: Provided is a process for making a paper based product which comprises first preparing a slurry of a cellulosic pulp, a particulate binder, and an emulsion comprised of lecithin and a fatty acid or derivative thereof. This slurry is then drained of liquid to form a web, with the web being dried to provide the paper based product. The preferred polymeric binder is a hydrolyzed polyvinyl alcohol powder, which binder can be present in the final dried product in amounts of up to about 20 weight percent or more. The use of the emulsion comprised of lecithin and a fatty acid or derivative thereof permits a web containing such a high amount of sticky polymeric binder to be dried at high temperatures, without the web sticking to the drying cans generally used in commercial processes. The process of the present invention thereby permits one to efficiently prepare such a paper based product using conventional, commercial papermaking machinery.Type: GrantFiled: June 7, 1995Date of Patent: September 1, 1998Inventor: Homan B. Kinsley, Jr.
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Patent number: 5789031Abstract: A process for manufacturing a coated paper for use in printing is characterized in that the coated paper for printing is produced by coating a color consisting mainly of pigment and a water-soluble binder made of starch or starch derivatives to the surface of a base paper, then drying and finishing it. Steam or an aqueous penetrant solution having a penetrating force of less than 50 seconds is sprayed or applied over the dry coated layer surface of the coated paper, prior to it being finished with a calender, for redistributing the water-soluble binder in the coated layer in order to correct its uneven distribution, which is the cause of printing mottle during the offset printing operation.Type: GrantFiled: December 16, 1996Date of Patent: August 4, 1998Assignee: Oji Paper Co., Ltd.Inventors: Tetsuya Hirabayashi, Hideyuki Suzuki, Terunobu Fukui
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Patent number: 5756156Abstract: A method for producing surface-treated paper, in particular of fine paper, and a dry end of a paper machine that makes use of the method. A paper web that has been dewatered by pressing is dried in the forward dryer section, in which drying energy is applied to the paper web over the entire length of the forward dryer section asymmetrically in the z-direction from the side of the bottom face of the web. This step is carried out by a number of successive groups with single-wire draw that are open downward. In this manner, shrinkage of the web both in the machine direction and in the cross direction is reduced or at least partially prevented, which shrinkage tends to take place when the dry solids content becomes higher. Paper broke is removed from underneath the drying groups that are open downward substantially by the force of gravity onto the broke conveyor placed underneath.Type: GrantFiled: August 29, 1996Date of Patent: May 26, 1998Assignee: Valmet CorporationInventors: Seppo Elijoki, Heikki Ilvespaa, Antti Kuhasalo, Reima Kerttula
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Patent number: 5667641Abstract: The invention overcomes the problem of paper edge overdrying during the paper drying process on paper machine drying cylinders. It comprises applying a thin ceramic coating onto the circumferential exterior surface of the cylinder near the cylinder edges, thereby forming a thermal barrier coating which decreases paper drying rate at said edges and reduces or eliminates paper edge overdrying.Type: GrantFiled: October 23, 1995Date of Patent: September 16, 1997Assignees: Pulp and Paper Research Institute of Canada, Pyrogenesis Inc.Inventors: Nicole A. Poirier, Peter G. Tsantrizos
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Patent number: 5651863Abstract: An apparatus and method for treating a sheet material (3) with an arrangement of rollers (6, 7), including at least one heated roller (8, 9), which defines at least one roller gap through which the sheet of material is passed and acted upon with pressure and/or elevated temperature. A housing (32) surrounds the roller arrangement (6, 7) and the treatment takes place in an environmental atmosphere, the temperature and/or humidity of which can be adjusted to a specified value. A roll of the sheet material is subjected to pretreatment to provide it with desired temperature and humidity conditions before entering the housing (32).Type: GrantFiled: April 12, 1995Date of Patent: July 29, 1997Assignee: Voith Sulzer Finishing GmbHInventors: Rolf Van Haag, Ulrich Rothfuss
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Patent number: 5637195Abstract: This invention relates to a method for reducing off-taste and/or odor from hygienic paper packages (such as food and beverage packaging) by heating and steam stripping the surface of the paper web. Such methods of this type, generally, remove undesirable compounds that create off-taste and/or odor from the paper package in a simple, cost-effective manner.Type: GrantFiled: March 23, 1995Date of Patent: June 10, 1997Assignee: Westvaco CorporationInventor: James J. Foster
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Patent number: 5616267Abstract: A roll mill having a pair of thick, solid, heated rollers made of refractory material to heat materials to be mixed therebetween to a temperature in the range of approximately 500 degrees C. to 4000 degrees C.Type: GrantFiled: February 1, 1995Date of Patent: April 1, 1997Inventor: Gregory R. Brotz
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Patent number: 5609936Abstract: A drying screen for paper making machines is described which comprises at least one layer of a thread composite and a thin glued-on, perforated or slit sheet i.e., with thermoplastic material-comprising filaments. The individual layers are preferably connected to one another in three layers and arranged one above the other, with the layer facing the paper web always being oriented in the direction of paper travel.Type: GrantFiled: June 24, 1994Date of Patent: March 11, 1997Assignee: Wurttembergische Filztuchfabrik D. Geschmay GmbHInventors: Ernst Kohler, Bernd Sabrowski, Ulrich Altenhofen
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Patent number: 5593545Abstract: A method for making uncreped throughdried tissues is disclosed in which the dried tissue sheet is fully supported by a fabric up to the reel. This method eliminates the open draw between the throughdryer and the reel and thereby eliminates sheet breaks normally associated with such open draws. In addition, the machine direction strength of the sheet can be reduced since the added strength is not needed to traverse the open draw normally present in current processes. Reducing the MD strength in turn enables the production of more square, less stiff sheet, which improves the tactile properties of the product.Type: GrantFiled: February 6, 1995Date of Patent: January 14, 1997Assignee: Kimberly-Clark CorporationInventors: James S. Rugowski, Michael J. Rekoske, Philip S. Lin, Ronald F. Gropp, Paul A. B. L. M. Arnold
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Patent number: 5569359Abstract: Blistering of a wet paper web upon a yankee dryer drum is controlled by directing compressed dry air toward the wet paper web in the space between a pressure roll external of the yankee dryer hood and the entry opening between the dryer hood and the yankee dryer drum. The flow of compressed air is controlled so that air flow can be modified across the full width of the wet paper web.Type: GrantFiled: March 28, 1995Date of Patent: October 29, 1996Assignee: James River Paper Company, Inc.Inventor: John R. Joiner
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Patent number: 5553393Abstract: A dryer section of a paper machine including cylinder groups provided with single-wire draw having smooth-faced heated drying cylinders against which a web to be dried enters into direct contact, and reversing rolls. The groups with single-wire draw have a drying wire which is guided in a loop by guide rolls as well as by the drying cylinders and the reversing rolls so that the drying cylinders are placed outside the wire loop, and the reversing rolls are situated in gaps between the drying cylinders inside the drying-wire loop. In order to optimize the drying capacity calculated per unit of length of the dryer section in the machine direction, as the drying makes progress, a different ratio of the drying cylinder diameter to the reversing roll diameter is employed, so that, in the first group or groups in the initial end of the dryer section, the ratio is higher than the corresponding ratio in the groups in the middle area of the dryer section.Type: GrantFiled: March 24, 1995Date of Patent: September 10, 1996Assignee: Valmet CorporationInventors: Ville Korhonen, Allan Liedes, Jouko Yli-Kauppila
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Patent number: 5536535Abstract: A process for producing coated paper comprises applying an aqueous coating solution onto coating base paper and drying the coating base paper, wherein a steam provided for drying or gas composed mainly of a steam is brought into direct contact with paper sheet, heated for regeneration, and then circulation for re-use, in which owing to the improvements in the heat efficiency and drying rate in the drying step, not only the productivity is improved, but also a high-quality coated paper is stably produced with a good efficiency.Type: GrantFiled: March 8, 1995Date of Patent: July 16, 1996Assignee: Nippon Paper Industries Co., Ltd.Inventors: Yoichi Yamazaki, Hirotoshi Aikawa, Kazuaki Kamata, Yasunori Nanri
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Patent number: 5510002Abstract: The internal bulk of a tissue web can be improved during manufacturing of the basesheet by subjecting the tissue web to differential pressure while supported on a coarse fabric at a consistency of about 30 percent or greater. The differential pressure, such as by applying vacuum suction to the underside of the coarse fabric, causes the wet web to deflect into the openings or depressions in the fabric and "pop" back, resulting in a substantial gain in thickness or internal bulk. The method is especially adapted to improve the internal bulk of wet-pressed tissue webs.Type: GrantFiled: September 14, 1994Date of Patent: April 23, 1996Assignee: Kimberly-Clark CorporationInventors: Michael A. Hermans, Fung-Jou Chen, Harry L. Spiegelberg, Bernhardt E. Kressner, Janice G. Nielsen
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Patent number: 5510001Abstract: The internal bulk of a tissue web can be improved during manufacturing of the basesheet by subjecting the tissue web to differential pressure while supported on a coarse fabric at a consistency of about 30 percent or greater. The differential pressure, such as by applying vacuum suction to the underside of the coarse fabric, causes the wet web to deflect into the openings or depressions in the fabric and "pop" back, resulting in a substantial gain in thickness or internal bulk. The method is especially adapted to improve the internal bulk of wet-pressed tissue webs.Type: GrantFiled: September 14, 1994Date of Patent: April 23, 1996Assignee: Kimberly-Clark CorporationInventors: Michael A. Hermans, Fung-Jou Chen, Harry L. Spiegelberg, Bernhardt E. Kressner, Janice G. Nielsen
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Patent number: 5505818Abstract: The internal bulk of a tissue web can be improved during manufacturing of the basesheet by subjecting the tissue web to differential pressure while supported on a coarse fabric at a consistency of about 30 percent or greater. The differential pressure, such as by applying vacuum suction to the underside of the coarse fabric, causes the wet web to deflect into the openings or depressions in the fabric and "pop" back, resulting in a substantial gain in thickness or internal bulk. The method is especially adapted to improve the internal bulk of wet-pressed tissue webs.Type: GrantFiled: September 14, 1994Date of Patent: April 9, 1996Assignee: Kimberly-Clark CorporationInventors: Michael A. Hermans, Fung-Jou Chen, Harry L. Spiegelberg, Bernhardt E. Kressner, Janice G. Nielsen
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Patent number: 5498314Abstract: Provided is a process for making a paper based product which comprises first preparing a slurry of a cellulosic pulp, a particulate binder, and an emulsion comprised of lecithin and a fatty acid or derivative thereof. This slurry is then drained of liquid to form a web, with the web being dried to provide the paper based product. The preferred polymeric binder is a hydrolyzed polyvinyl alcohol powder, which binder can be present in the final dried product in amounts of up to about 20 weight percent or more. The use of the emulsion comprised of lecithin and a fatty acid or derivative thereof permits a web containing such a high amount of sticky polymeric binder to be dried at high temperatures, without the web sticking to the drying cans generally used in commercial processes. The process of the present invention thereby permits one to efficiently prepare such a paper based product using conventional, commercial papermaking machinery.Type: GrantFiled: August 9, 1993Date of Patent: March 12, 1996Assignee: CPG Holdings Inc.Inventor: Homan B. Kinsley, Jr.
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Patent number: 5492598Abstract: The internal bulk of a tissue web can be improved during manufacturing of the basesheet by subjecting the tissue web to differential pressure while supported on a coarse fabric at a consistency of about 30 percent or greater. The differential pressure, such as by applying vacuum suction to the underside of the coarse fabric, causes the wet web to deflect into the openings or depressions in the fabric and "pop" back, resulting in a substantial gain in thickness or internal bulk. The method is especially adapted to improve the internal bulk of throughdried tissue webs.Type: GrantFiled: September 14, 1994Date of Patent: February 20, 1996Assignee: Kimberly-Clark CorporationInventors: Michael A. Hermans, Fung-Jou Chen, Harry L. Spiegelberg, Bernhardt E. Kressner, Janice G. Nielsen
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Patent number: 5470436Abstract: The specification discloses an improved method for drying a paper or paperboard web emerging from the press section of a papermaking machine as it traverses a dryer unit. The method comprises continuously rewetting the web across its width during the initial web drying stage when the web has a solids content of no more than about 65 wt. %. The method improves the water removal rate and decreases the shrinkage rate of the web during drying.Type: GrantFiled: November 9, 1994Date of Patent: November 28, 1995Assignee: International Paper CompanyInventors: Dinkar G. Wagle, Raymond A. Volpe
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Patent number: 5469636Abstract: A device for treating material webs includes first and second neighboring drying cylinders separated by an intermediate space. The intermediate space has a length substantially equal to about twice the diameter of the largest of the first and second cylinders. The device includes at least a first deflecting roll disposed in the intermediate space and in a path of a material web conveyed through the device. The device further includes at least a second deflecting roll disposed below a coating device and above the intermediate space. The second deflecting roll is adapted to feed a web of material upwardly into the coating device.Type: GrantFiled: April 18, 1994Date of Patent: November 28, 1995Assignee: J.M. Voith GmbHInventor: Anton Plomer
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Patent number: 5466336Abstract: The present invention provides a process for making a paper based product which comprises a paper sheet, an aqueous latex binder and a release agent comprised of an emulsion of lecithin and a fatty acid or derivative thereof. In one embodiment, the process comprises first preparing a slurry of a cellulosic pulp and a polymeric latex binder, and then breaking the stability of the latex so that the polymer particles of the latex are able to be deposited on the fibers of the cellulosic pulp. An emulsion comprised of lecithin and a fatty acid or derivative thereof is added during the process. The addition can be to the slurry, or to the web which is formed when the slurry is drained of liquid. The web is then dried to provide the paper based product. In a preferred embodiment, a slurry of cellulosic pulp is first drained of liquid to form a web, with the polymeric latex binder and emulsion being applied to the web prior to drying.Type: GrantFiled: August 9, 1993Date of Patent: November 14, 1995Assignee: CPG Holdings Inc.Inventor: Homan B. Kinsley, Jr.
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Patent number: 5436094Abstract: A bulky synthetic pulp sheet which does not lose its shape even after having absorbed a liquid and has excellent resistance against to chemicals such as acids and alkalis, and a process for preparing the same, which pulp sheet contains 5 to 95% by weight of a synthetic pulp having a drainage factor over a range of from 0.1 to 2.0 sec/g, and 5 to 50% by weight of a polymer binder having a melting point lower than a melting point or a decomposition temperature of said synthetic pulp, the sheet being obtained by subjecting a mixture of the synthetic pulp and fibrous binder to wet laid sheet-making followed by a heat treatment, and having an apparent density of 0.15 g/cm.sup.3 or smaller under the load of 200 g/cm.sup.2.Type: GrantFiled: March 18, 1994Date of Patent: July 25, 1995Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Koji Horimoto, Makoto Nakamaru, Yukio Kohno
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Patent number: 5425851Abstract: Web offset printing paper having a high level of gloss and smoothness is prepared by finishing a paper web, either by supercalender or with a synthetic roll calender at a moisture content greater than the moisture content typically used for web offset finishing, and then drying the web to a moisture content of less than about 3.5% using convection, radiation or conduction. Under the preferred post-drying conditions, bonding of the previously wet paper fibers takes place to lock in the desirable printing characteristics and to prevent heat roughening on the offset press.Type: GrantFiled: September 30, 1992Date of Patent: June 20, 1995Assignee: Westvaco CorporationInventors: David B. Cason, Paul A. Huijing, Eric D. Johnson, Bryan J. Ortman, S. Craig Petro