With Heating And/or Cooling Patents (Class 162/206)
  • Publication number: 20020040772
    Abstract: A coated paper product having high gloss and brightness is prepared by a process wherein a paper substrate is coated on at least one side with an aqueous coating formulation comprising an effective amount of a plastic pigment, and finished in a supercalender device containing heated rolls to produce a surface which is comparable to a cast coated surface.
    Type: Application
    Filed: February 21, 2001
    Publication date: April 11, 2002
    Inventors: Dean R. Johnson, Eric D. Johnson, James E. Shultz
  • Patent number: 6368458
    Abstract: A calender press for use in a paper-making machine includes a top roll positioned adjacent to a nip and rotatable about a longitudinal axis thereof. The top roll has a length and circumferential perimeter. The length extends in the direction of and is longer than the width of the fiber web. The top roll is thermally compensated in a plurality of thermal zones which are adjacent to each other across the length of the top roll, whereby the perimeter of the top roll may be adjusted in a locally adjustable manner toward and away from the nip. A bottom roll is positioned adjacent to the top roll and defines the nip with the top roll. The bottom roll is rotatable about a longitudinal axis thereof and has a length and circumferential perimeter. The length extends in the direction of and is longer than the width of the fiber web. The perimeter is smaller at each longitudinal end of the bottom roll and larger at approximately a midpoint between the longitudinal ends, thereby defining a crowned bottom roll.
    Type: Grant
    Filed: March 24, 2000
    Date of Patent: April 9, 2002
    Assignee: Voith Sulzer Paper Technology North America, Inc.
    Inventors: Edwin X. Graf, James A. Eng
  • Patent number: 6365004
    Abstract: A method and apparatus effect drying of a paper web using a plurality of heated drying cylinders and at least one air impingement module having a hood. The paper web is brought into operative contact with the heated drying cylinders, and at least one of the final moisture content, quality, and cross-direction profile of the paper web is regulated. The regulation is effected by adjusting the efficiency of air impingement drying of the paper web, by adjusting at least one of the blowing velocity of the medium (typically air) blown against the paper web, the humidity of the blowing medium, and the distance of the hood of the impingement module from the paper web. At least one of the final moisture content of the paper web and its quality may also be regulated by adjusting the steam pressure of one or more drying cylinder groups.
    Type: Grant
    Filed: August 17, 2000
    Date of Patent: April 2, 2002
    Assignee: Metso Paper, Inc.
    Inventors: Kristian Hamstr{haeck over (o)}m, Harri Happonen, Antti Kuhasalo, Juha Lipponen, Järkko Nurmi, Juha Ojanen, Hans Sundqvist
  • Patent number: 6365003
    Abstract: Apparatus and process for processing material web. Apparatus includes a rotatable cylinder, in which material web is guided over rotatable cylinder, first fixed carrier, and at least three belt guide rolls, in which one of the at least three guide belts is pivotably coupled to fixed carrier. Endless belt is mounted on and guided by at least three belt guide rolls, where endless belt is guided over rotatable cylinder in a same direction as material web, and pivotably coupled belt guide roll is pivotably positionable between a tensioning position and a retracted position relative to endless belt. Second fixed carrier is provided and tensioning roll is positioned outside of endless belt and pivotably coupled to second fixed carrier, so that tensioning roll is pivotably positionable between a retracted position and a loading position of endless belt. Tensioning roll is further positioned between pivotably coupled belt guide roll and adjacent belt guide roll.
    Type: Grant
    Filed: January 21, 2000
    Date of Patent: April 2, 2002
    Assignee: Voith Sulzer Papiertechnik Patent GmbH
    Inventor: Franz Reisinger
  • Patent number: 6365000
    Abstract: The present invention is a method of making an ultra soft, multi-ply tissue from non-premium furnish using wet press technology and the product produced thereby.
    Type: Grant
    Filed: December 1, 2000
    Date of Patent: April 2, 2002
    Assignee: Fort James Corporation
    Inventors: John H. Dwiggins, Frank D. Harper, Galyn A. Schulz, Brian J. Schuh, Michael S. Heath, T. Philips Oriaran
  • Patent number: 6364997
    Abstract: The invention relates to a imaging element comprising a paper having a surface roughness average of between 0.13 and 0.44 micrometers.
    Type: Grant
    Filed: April 20, 2000
    Date of Patent: April 2, 2002
    Assignee: Eastman Kodak Company
    Inventors: Sandra J. Dagan, Thaddeus S. Gula, Robert P. Bourdelais, Peter T. Aylward
  • Patent number: 6355200
    Abstract: The present invention relates to a method of and an apparatus for providing fluid distribution materials with improved wicking properties in a preferential fluid distribution direction. Such fluid distribution materials are particularly useful in absorbent core structures such as used in disposable absorbent articles like baby diapers, incontinence products or catamenial products. The invention is concerned with applying a special mechanical treatment to distribution materials, by which the softness and the fluid handling properties of the materials are improved.
    Type: Grant
    Filed: August 30, 1999
    Date of Patent: March 12, 2002
    Assignee: The Procter & Gamble Company
    Inventors: Mattias Schmidt, Vincenzo D'Acchioli
  • Patent number: 6352590
    Abstract: The present invention relates to a device for moistening a web-shaped material, wherein the moistening device is designed as a device for mobile use, and wherein the web-shaped material can be laterally pushed into the moistening device.
    Type: Grant
    Filed: June 17, 1999
    Date of Patent: March 5, 2002
    Assignee: Weitmann & Konrad GmbH & Co. KG
    Inventor: Günter Hess
  • Patent number: 6350349
    Abstract: Cellulosic webs, such as tissue webs, can be dewatered to consistencies of about 70 percent or greater in a high intensity extended nip press while retaining a substantial amount of bulk. While webs intended for use as tissues containing conventional furnishes become overly densified when passed through a high intensity extended nip press, furnishes containing certain types of fibers, such as chemically cross-linked or heat-treated fibers, resist compression and allow the compressed web to retain a high level of bulk after a high degree of dewatering.
    Type: Grant
    Filed: May 10, 1996
    Date of Patent: February 26, 2002
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Michael Alan Hermans, Charles Edward Friedbauer
  • Patent number: 6344110
    Abstract: A process for producing paper having a three-dimensional structure of alternating raised and recessed portions including passing a wet paper web through a heated press nip so the paper web is simultaneously dried by means of impulse drying and given a three dimensional structure. The heated press nip includes a heated pressure roll with a three dimensional pattern of alternating raised and recessed portions in its surface and a compressible surface. The compressible surface can be a compressible press felt which supports the wet paper web prior to and through the heated press nip. The compressible press felt may be pressed against a resilient compressible surface in the heated press nip away from the heated cylinder. The wet paper web may be a papermaking pulp containing at least 10%, and preferably at least 30% or 50% by weight of a high-yield pulp such as TMP or CTMP.
    Type: Grant
    Filed: June 19, 2000
    Date of Patent: February 5, 2002
    Assignee: SCA Hygiene Products AB
    Inventors: Lennart Reiner, Holger Hollmark, Hans-Jürgen Lamb, Hans Wallenius
  • Patent number: 6322732
    Abstract: Reformation techniques and apparatus. Typically employed to permit separate printing and finishing of multiple webs of paper, these techniques and apparatus utilize or provide heat and, in some cases, initial tension, to change dimensions (including repeat length) of the paper of one or more webs. Webs dimensionally-reformed in accordance with the techniques typically do not require subsequent variation of tension to maintain appropriate dimension, permitting any such tension variation to occur solely to enhance other aspects of the finishing processes.
    Type: Grant
    Filed: October 29, 1999
    Date of Patent: November 27, 2001
    Assignee: Dittler Brothers Incorporated
    Inventors: Reed Bowen, Daniel Winfield Leidig, Jr.
  • Publication number: 20010035273
    Abstract: A method and arrangement for drying a paper to be surface-treated, in particular fine paper, in an after-dryer in a paper machine. The paper web is first dried in a forward dryer section of the paper machine by one or more groups with single-wire draw that are open downward on support of a drying wire, the paper web is then finished in a finishing section, e.g., surface-sized or coated, and thereafter, the paper web is dried by an upwardly open inverted group with single-wire draw. In the inverted group with single-wire draw, the tendency of curling formed in the paper web in the forward dryer section can be substantially eliminated and/or compensated for.
    Type: Application
    Filed: June 28, 2001
    Publication date: November 1, 2001
    Inventors: Antti Kuhasalo, Pasi Ahonen
  • Patent number: 6306261
    Abstract: Dewatering device and process of a machine for at least one of production and processing of a material web, as well as a glazing device an process. The dewatering device includes a circulating flexible continuous belt and an opposite surface. The circulating flexible continuous belt and the opposite surface are arranged to form a nip elongated in a web travel direction, and at least one screen is adapted to guide the material web through the nip. A saddle, which is arranged to support the circulating flexible continuous belt, is segmented in the web travel direction into saddle segments connected to each other. The saddle segments are at least partially separately pressurized. The dewatering process includes guiding the material web through the nip, and at least partially separately pressurizing the saddle segments against the opposite surface.
    Type: Grant
    Filed: August 30, 2000
    Date of Patent: October 23, 2001
    Assignee: Voith Sulzer Papiertechnik GmbH
    Inventors: Andreas Meschenmoser, Joachim Henssler, Walter Holzer
  • Patent number: 6294050
    Abstract: Drying end of a machine for the production of a material web such as paper or cardboard. The drying end includes at least one impact flow drier configured to bombard at least one surface of the material web with hot air or hot steam impact flow. Also provided is a method for drying a material web including bombarding the material web on at least one surface with hot air or hot steam impact flow, via at least one impact flow drier.
    Type: Grant
    Filed: September 10, 1999
    Date of Patent: September 25, 2001
    Assignee: Voith Sulzer Papiertechnik Patent GmbH
    Inventors: Markus Oechsle, Tri Chau-Huu, Roland Mayer
  • Patent number: 6289797
    Abstract: Method in calendering of a paper web in which the paper web is conveyed through a calendering nip formed by two calender rolls, at least one of which is a soft-faced roll having a coating of a resilient or polymeric material, or over which a belt of resilient or polymeric material is directed and passed through the nip. The profile of the calendering nip is controlled to compensate for defects in the web entering the calender. The profile control is accomplished by changing the diameter of the soft-faced roll zonewise by a profile control device arranged inside the body and performing temperature profiling. The profile control device include temperature control elements such as heating elements located in zones for heating a heat transfer medium such as air supplied into the body.
    Type: Grant
    Filed: March 12, 1999
    Date of Patent: September 18, 2001
    Assignee: Valmet Corporation
    Inventor: Vesa Ijäs
  • Patent number: 6287424
    Abstract: A paperboard product having at least one layer of bleached or semi-bleached pulp and having improved smoothness and reduced bulk loss. For paperboard having sizing without pigment, the smoothness on the printed side as measured by the Parker test is better (lower) than 6.5 when measured using a pressure of 10 kgf/cm2 while the smoothness measured by the Hagerty/Sheffield test is not below 280 Sheffield units. For paperboard having sizing with pigment, the Parker smoothness is less than 5.0 and the Hagerty/Sheffield smoothness is not less than 180 Sheffield units. The web is finished by applying temperature and moisture gradients to the web and then smoothing the web surface using extended nip calendering. The surface of the calendering roll is maintained at a temperature of 250-400° F. Prior to entering the extended nip, the web surface is moisturized using steam showers. The nipload applied in the heated extended nip is preferably in the range of 300 to 2,500 pli.
    Type: Grant
    Filed: September 22, 1998
    Date of Patent: September 11, 2001
    Assignee: International Paper Company
    Inventors: K. Krishna Mohan, Michael J. Smith, Alexander A. Koukoulas
  • Patent number: 6280572
    Abstract: A method of producing dimensionally stable paper and/or paperboard products by treating a hygroreactive cellulosic fiber matrix with a hydrophobic sizing agent solution; and drying the treated fibers using heat and/or pressure so that the hydrophobic sizing agent penetrates the fiber matrix making it hydrophobic.
    Type: Grant
    Filed: December 21, 1998
    Date of Patent: August 28, 2001
    Assignee: International Paper Company
    Inventors: Yan C. Huang, Murray Bruce Lyne, Clifford Kent Hatcher, Gurudatta D. Nadkarni
  • Patent number: 6280574
    Abstract: The moisture application system of the present invention comprises in combination a first means for applying liquid to a paper web and a second means in contact with the web for scraping off excess liquid and spreading the liquid uniformly across the paper web. The moisture application system of the present invention is particularly useful when combined with a machine calender for finishing a paper web.
    Type: Grant
    Filed: April 23, 1999
    Date of Patent: August 28, 2001
    Assignee: Westvaco Corporation
    Inventor: Donald G. Bauer
  • Patent number: 6274001
    Abstract: A calendering method which enhances the smoothness of surface sized paper/paperboard by a combination of temperature and moisture gradient calendering processes without the fiber sticking/picking problems that affect runnability and without using waterboxes. The moisture gradient calendering is performed so that the cross direction moisture profile can be corrected and high smoothness levels can be obtained. Heated calender rolls form a hot pressure nip having a temperature greater than the temperature of the moisturized web. Lubricant is applied to both sides of the web to prevent fiber sticking/picking in the hot nip. The lubricant may be applied by the size press, by the moisturizing showers or by separate lubricant showers. The smoothness developed by moisturizing and hot nip calendering is substantially irreversible.
    Type: Grant
    Filed: October 21, 1997
    Date of Patent: August 14, 2001
    Assignee: International Paper Company
    Inventor: K. Krishna Mohan
  • Patent number: 6273996
    Abstract: Low-density uncreped through-air-dried webs containing bleached chemithermomechanical pulp fibers and a wet-strength resin are calendered to significantly increase density and reduce caliper. When wetted, these webs substantially return to their original caliper and density and substantially regain their original fluid-handling characteristics. Consequently these webs are very thin when dry and thick when wet. They can be used for a wide variety of applications, including paper towels, wipers and fluid-handling components for infant care and personal care products.
    Type: Grant
    Filed: March 13, 1998
    Date of Patent: August 14, 2001
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: David Henry Hollenberg, James Ellis Horton, Jr., Andrew Michael Lake
  • Patent number: 6260481
    Abstract: 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.
    Type: Grant
    Filed: July 10, 1997
    Date of Patent: July 17, 2001
    Assignee: V.I.B. Apparatebau GmbH
    Inventor: Stefan H. Winheim
  • Patent number: 6261414
    Abstract: The present invention relates to a method of producing a laminate base material useful for preparing a prepreg or a laminate for electronic equipment such as printed board. The method comprises the steps of: (1) preparing a slurry comprising para-aramid fibers and curable phenolic resin fibers; (2) preparing a sheet from said slurry; (3) adding a resin binder to said sheet so as to bond the fibers with each other, thereby to form a combined non-woven fabric and (4) compressing said non-woven fabric under heating. According to the present invention, a prepreg or laminate is obtained which has an improved high-frequency characteristics and much less warp.
    Type: Grant
    Filed: November 4, 1998
    Date of Patent: July 17, 2001
    Assignee: OJI Paper Co., Ltd.
    Inventors: Yoshihisa Kato, Takekazu Adachi, Mamoru Murata
  • Patent number: 6248211
    Abstract: A method for making a throughdried tissue sheet is disclosed. The method includes the steps of depositing an aqueous suspension of papermaking fibers onto an endless forming fabric to form a wet web. The wet web is then transferred to a throughdrying fabric such that the wet web has a fabric side in contact with the throughdrying fabric and an opposite air side facing away from the throughdrying fabric. The wet web is routed over a throughdryer to dry the web. The web is then transferred to a Yankee dryer for further drying and is creped from the Yankee dryer to obtain a creped web having a basis weight of about 15.2 pounds per 2880 square feet. The creped web in then calendered in a calendering unit that includes a smooth calender roll and a resilient calender roll. The resilient calender roll has an exterior covering formed of ethylene propylene diene polymer and the creped web is oriented such that the fabric side is disposed toward the resilient calender roll.
    Type: Grant
    Filed: August 9, 1999
    Date of Patent: June 19, 2001
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Richard Douglas Jennings, Zeinab Salman
  • Patent number: 6245874
    Abstract: A process for making paper with increased wet and dry strength by incorporating into the pulp suspension an ionic thermosettable resin which is the reaction product of dialdehyde and epihalohydrin, or epihalohydrin equivalent, with a copolymer containing monomer units derived by polymerization of monomers comprising acrylamide or alkyl-substituted acrylamide and diallylamine or an acid salt thereof. The paper has wet and dry strength greater than that of paper not containing the resin and has a higher repulpability index than wet strength paper that is essentially the same but contains conventional polyazetidinium ion containing wet strength resin instead of the ionic thermosettable resin.
    Type: Grant
    Filed: March 1, 2000
    Date of Patent: June 12, 2001
    Assignee: Hercules Incorporated
    Inventors: Ronald Richard Staib, Joseph Raymond Fanning, William Walter Maslanka
  • Patent number: 6231723
    Abstract: 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: Grant
    Filed: June 2, 1999
    Date of Patent: May 15, 2001
    Assignee: Beloit Technologies, Inc
    Inventors: Roger A. Kanitz, Thomas D. Rogers
  • Patent number: 6221210
    Abstract: The present invention relates to transfer paper in electrophotography that shrinks by no more than 0.45% in a direction crossing a flow in making paper process and which has a two sideness shrinkage difference in a crossing direction ranging 0.02 to −0.02%. The present invention also relates a process for producing electrophotographic transfer paper comprising the steps of feeding pulp suspension liquid onto at least one wire to form a paper layer in making paper process, in which a ratio between feeding speed of the pulp suspension liquid and moving speed of wire is controlled to cause a propagating velocity ratio of longitudinal waves of a produced transfer paper in the range from 1.1 to 1.5.
    Type: Grant
    Filed: May 16, 1995
    Date of Patent: April 24, 2001
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Tsutomu Kurihara, Hiroyoshi Hosomura, Katsumi Harada
  • Patent number: 6213009
    Abstract: The invention relates to a method for operating a calender, comprising a cylindrical heated roll and a flexible belt surrounding a stationary support beam which supports at least one actuator which may urge a concave load shoe against the heated roll by means of said flexible belt to form an extended and heated nip through which a fiber web passes to be calendered and a separating mechanism for having at least one of the rolls movable into and away from the nip characterized in that said flexible belt is a flexible tubular jacket which forms a part of an enclosed shoe roll such that the ends of said jacket have end walls mounted thereto, which end walls are rotatably mounted in relation to said support beam, and in that at least one of said end walls is driven by means of a drive arrangement which drive arrangement may be activated to drive the end walls and thereby also the jacket independently of its position in relation to the fiber web or the heated roll.
    Type: Grant
    Filed: September 3, 1999
    Date of Patent: April 10, 2001
    Assignee: Valmet Corporation
    Inventors: Nils-Erik Sätman, Thomas Berglind
  • Patent number: 6200424
    Abstract: 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: Grant
    Filed: July 16, 1997
    Date of Patent: March 13, 2001
    Assignee: Valmet Corporation
    Inventors: Juhani Saari, Stefan Kuni
  • Patent number: 6200425
    Abstract: 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: Grant
    Filed: April 20, 1999
    Date of Patent: March 13, 2001
    Assignee: Neles Paper Automation Oy
    Inventor: Kari Pellinen
  • Patent number: 6190505
    Abstract: An apparatus for moistening a material web, the material web having opposed edges and a marginal region at each edge, the apparatus including a moistening device adapted to cover the marginal regions of the material web, so that only the marginal regions are moistened. Also provided is a method for moistening a material web, the method including covering the marginal regions of the material web with a moistening apparatus, and moistening only the marginal regions of the material web covered by the moistening apparatus.
    Type: Grant
    Filed: May 28, 1999
    Date of Patent: February 20, 2001
    Assignee: Voith Sulzer Papiertechnik Patant GmbH
    Inventor: Franz Kayser
  • Patent number: 6187139
    Abstract: The present invention is a method for making a high quality paper product at improved process efficiency through the use of high steam levels in the Yankee dryer. The product according to the present invention is creped from the Yankee dryer while it is still wet and is then drying is completed using conventional methods. Products made according to the present invention exhibit improved absorbency, softness and bulk.
    Type: Grant
    Filed: July 13, 1999
    Date of Patent: February 13, 2001
    Assignee: Fort James Corporation
    Inventors: Steven L. Edwards, Robert J. Marinack
  • Patent number: 6187137
    Abstract: 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: Grant
    Filed: October 31, 1997
    Date of Patent: February 13, 2001
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Frank Gerald Druecke, Shan Liang Chen, Michael Alan Hermans, Sheng-Hsin Hu, Richard Joseph Kamps
  • Patent number: 6183603
    Abstract: This invention relates to calendering systems. Such structures of this type, generally, employ the use of hard and soft nips to provide excellent smoothness without gloss mottle.
    Type: Grant
    Filed: March 12, 1999
    Date of Patent: February 6, 2001
    Assignee: Westvaco Corporation
    Inventors: Stephen Nicholson, Steven Herman Parker, Domenick Larry Raschella, Sharon Rae Stampfl
  • Patent number: 6158334
    Abstract: The invention relates to a method for operating a calender, comprising a cylindrical heated roll and a flexible belt surrounding a stationary support beam which supports at least one actuator which may urge a concave load shoe against the heated roll by means of said flexible belt to form an extended and heated nip through which a fiber web passes to be calendered and a separating mechanism for having at least one of the rolls movable into and away from the nip characterised in that said flexible belt is a flexible tubular jacket which forms a part of an enclosed shoe roll such that the ends of said jacket have end walls mounted thereto, which end walls are rotatably mounted in relation to said support beam, and in that at least one of said end walls is driven by means of a drive arrangement which drive arrangement may be activated to drive the end walls and thereby also the jacket independently of its position in relation to the fiber web or the heated roll.
    Type: Grant
    Filed: September 3, 1999
    Date of Patent: December 12, 2000
    Assignee: Valmet Corporation
    Inventors: Nils-Erik Safman, Thomas Berglind
  • Patent number: 6158335
    Abstract: The invention relates to a method for operating a calender, comprising a cylindrical heated roll and a flexible belt surrounding a stationary support beam which supports at least one actuator which may urge a concave load shoe against the heated roll by means of said flexible belt to form an extended and heated nip through which a fiber web passes to be calendered and a separating mechanism for having at least one of the rolls movable into and away from the nip characterized in that said flexible belt is a flexible tubular jacket which forms a part of an enclosed shoe roll such that the ends of said jacket have end walls mounted thereto, which end walls are rotatably mounted in relation to said support beam, and in that at least one of said end walls is driven by means of a drive arrangement which drive arrangement may be activated to drive the end walls in and thereby also the jacket independently of its position in relation to the fiber web or the heated roll.
    Type: Grant
    Filed: September 3, 1999
    Date of Patent: December 12, 2000
    Assignee: Valmet Corporation
    Inventors: Nils-Erik Safman, Thomas Berglind
  • Patent number: 6156387
    Abstract: The invention relates to a process for the thermomechanical surface treatment of flat webs of material, particularly those made of paper and carton, and to agents for performing said process. According to the process of the invention, adhesion between the flat web of material and the surface of the tool used in thermomechanical surface treatment, e.g., a roll or a press, is reduced or prevented by using an abhesive agent, which contains dicarboxylic dialkyl esters and/or diisoalkyl esters of C.sub.2 -C.sub.12 dicarboxylic acids with C.sub.1 -C.sub.13 n- and/or iso-alkanols as component with abhesive effect. The abhesive agent is preferably employed as an oil-in-water emulsion and is either applied to the surface of the tool used in said thermomechanical treatment or is added to the impregnating fluid or the paper coating mass or the moistening water or the steam in pre-moistening, or is applied to the paper web after the impregnating unit or directly before the smoothing roll.
    Type: Grant
    Filed: November 5, 1998
    Date of Patent: December 5, 2000
    Assignees: Stockhausen GmbH & Co. KG, Kaemmerer GmbH
    Inventors: Joachim Werres, Bernd Reinhardt
  • Patent number: 6139686
    Abstract: 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: Grant
    Filed: December 19, 1997
    Date of Patent: October 31, 2000
    Assignee: The Procter & Gamble Company
    Inventors: Paul Dennis Trokhan, Mark Ryan Richards, Michael Gomer Stelljes, Jr.
  • Patent number: 6128833
    Abstract: The invention concerns a dryer-section concept of a paper/board machine and a method in the drying of a paper/board web (W). The dryer section comprises a number of drying cylinder groups (R.sub.I . . . R.sub.N), which comprise a single-wire draw, on whose support the web (W) is guided so that it meanders as loop-shaped from a drying cylinder onto a suction cylinder. The web (W)/the wire (H) is guided so that the web is placed against the face of the drying cylinder and the wire is placed outside. In the dryer-section concept, the web (W) is passed from one drying cylinder group (R.sub.I) into the next dryer group (R.sub.II) and further. According to the invention, at least some of the drying cylinders (K'.sub.1, K'.sub.2, K'.sub.
    Type: Grant
    Filed: October 10, 1997
    Date of Patent: October 10, 2000
    Assignee: Valmet Corporation
    Inventors: Kari Juppi, Markku Karlsson, Kari Edelmann
  • Patent number: 6090243
    Abstract: 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: Grant
    Filed: June 4, 1997
    Date of Patent: July 18, 2000
    Inventors: Glauco Corbellini, Peter A. Rodriguez
  • Patent number: 6083349
    Abstract: A machine for manufacturing a fibrous pulp web, in particular a tissue or hygienic paper web with a main press, including a contact shoe press unit and a drying cylinder, and a shoe pre-press. The main press is so designed that the pressure profile which is built up in its press opening along the length of the opening exhibits increasing pressure, which starts at the beginning of the opening and extends along at least one third, preferably a minimum of one half the length of the opening. The length of the main press is shorter (1/3 to 2/3) than the length of of the pre-press, the linear force of the pre-press is greater than the linear force of the main press, and the maximum pressure of the main press is greater than the maximum pressure of the pre-press.
    Type: Grant
    Filed: December 23, 1997
    Date of Patent: July 4, 2000
    Assignee: Voith Sulzer Papiermaschinen GmbH
    Inventor: Christian Schiel
  • Patent number: 6074525
    Abstract: 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: Grant
    Filed: May 18, 1998
    Date of Patent: June 13, 2000
    Assignee: The Procter & Gamble Company
    Inventor: Mark R. Richards
  • Patent number: 6039839
    Abstract: A paper web and method of making the paper web are disclosed. The paper web has a background portion and a non-embossed decorative pattern. The decorative pattern has at least one high basis weight region having a basis weight greater than the average basis weight of the surrounding background portion. The decorative pattern can include a number of discrete, decorative indicia. Each decorative indicia can be separated from adjacent decorative indicia by the background portion.
    Type: Grant
    Filed: February 3, 1998
    Date of Patent: March 21, 2000
    Assignee: The Procter & Gamble Company
    Inventors: Paul Dennis Trokhan, Dean Van Phan, Howard Thomas Deason, Jorg Kleinwachter
  • Patent number: 6024836
    Abstract: 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: Grant
    Filed: December 20, 1996
    Date of Patent: February 15, 2000
    Assignee: Voith Sulzer Papiermaschinen GmbH
    Inventors: Hans-Peter Sollinger, Markus Oechsle
  • Patent number: 6022448
    Abstract: 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: Grant
    Filed: October 10, 1997
    Date of Patent: February 8, 2000
    Assignee: Korsnab AB
    Inventors: Goran Eriksson, Klas-Erik Karlsson, Nils .ANG.ke Larsson, Sven H.ang.kansson
  • Patent number: 6004429
    Abstract: A machine and method for producing a fibrous material web, in particular a tissue paper or bathroom tissue web, whereby the machine includes at least one pre-press embodied as a shoe press, a main press, in the form of a press roll, and a drying cylinder, an endless top belt guided through the nips of the pre-press and the main press, and an underfelt guided via a bottom roll of the pre-press, wherein the top belt supplies the fibrous material web that has been preformed in a former first to the pre-press and then to the main press. The pre-press, which is embodied as a shoe press and has a nip that is elongated in the web travel direction, includes an upper shoe press unit and a bottom roll disposed opposite this. The upper shoe press unit is provided with a smooth, rotating flexible press belt. The bottom roll is grooved.
    Type: Grant
    Filed: December 22, 1997
    Date of Patent: December 21, 1999
    Assignee: Voith Sulzer Papiermaschinen GmbH
    Inventor: Christian Schiel
  • Patent number: 5997785
    Abstract: A molded body is produced on the basis of a raw material, the main content of which is material which is left after remolding pulp from paper and extraction of fibers from the pulp mass for remanufacturing of paper. This raw material which mainly consists of water, short fibers, and fine, mineral particles is drained by pressing in a first pressing stage between filter belts for production of a coherent body, is dried partially in a first drying stage is pressed and in a second pressing stage, and dried finally in a second drying stage. The invention concerns a similar method for separation of fibers and particles from waste water which results from repulping paper and reclaiming of fibers from the pulp mass for remanufacturing of paper, whereby an enviromental problem is solved in a very suitable way.
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: December 7, 1999
    Inventor: Frank Ivan Skjelmose
  • Patent number: 5983787
    Abstract: A method for calendering a paper web, including the steps of passing the paper web through a calendering nip having a profile formed from a pair of calendering rolls, wherein at least one of the pair of calendering rolls includes a soft exterior face at least in the region of the nip, regulating the profile of the calendering nip to compensate for flaws in the paper web passing through the calendering nip including varying the properties of the soft exterior face locally in a direction transverse to the direction of the passing paper web concurrently with the passing step.
    Type: Grant
    Filed: April 29, 1997
    Date of Patent: November 16, 1999
    Assignee: Valmet Corporation
    Inventors: Ari Linsuri, Reima Kerttula, Pekka Kivioja, Timo Nyberg
  • Patent number: 5980691
    Abstract: A smooth, high density tissue. The tissue has a relatively low caliper, as well as high smoothness and high density. The tissue is calendered from a multidensity, through air dried web.
    Type: Grant
    Filed: May 12, 1997
    Date of Patent: November 9, 1999
    Assignee: The Procter & Gamble Company
    Inventors: Paul Thomas Weisman, Scott Thomas Loughran, Dean Van Phan, Paul Dennis Trokhan, Robert Stanley Ampulski
  • Patent number: 5967958
    Abstract: 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: Grant
    Filed: November 3, 1997
    Date of Patent: October 19, 1999
    Assignee: Eduard Kusters Maschinenfabrik GmbH & Co. KG
    Inventors: Werner Borkenhagen, Peter Hader, Klaus Kubik
  • Patent number: 5938895
    Abstract: A calender is provided for calendering a fibrous web wherein the moisture profile of the web can be controlled. The calender includes a plurality of rolls wherein at least one of the rolls comprises a profiling roll. The profiling roll has a plurality of profiling zones extending in a cross-machine direction to define a profiling nip. The roll is independently expandable in each of the zones, such as by an internal pressurized shoe arrangement, so that the pressure in the profiling nip can be varied in the cross-machine direction. A waterbox is positioned adjacent to the profiling nip and water is carried directly into the profiling nip where at least a portion of the water is transferred to the web such that the moisture profile of the web can be varied in the cross-machine direction by varying the nip pressure in the respective profiling zones.
    Type: Grant
    Filed: April 2, 1998
    Date of Patent: August 17, 1999
    Assignee: Valmet Corporation
    Inventor: Kimmo Ilari Hirvonen