Of Porous Or Foraminous Member (e.g., Felt Or Mold) Patents (Class 162/274)
  • Patent number: 8366878
    Abstract: A structuring layer of a structuring belt for structuring a wet fibrous web in a press section of a tissue papermaking machine for manufacturing high bulk tissue paper, the structuring layer having a web-carrying side with a surface for cooperating with the fibrous web, the surface having depressions distributed over the web-carrying side and forming a three-dimensional structure of the surface. The depressions altogether constitute 20-80% of the surface. Each depression has a dimension l of 0.25-2.5 mm in a first direction in the plane of the top surface area, a dimension b of 0.25-2.0 mm in a second direction in the plane of the top surface area, such directions being at right angles to each other, a mean depth d of 0.05-0.6 mm, and an area a as measured in the plane of the top surface area of 0.063-5.0 mm2.
    Type: Grant
    Filed: July 9, 2012
    Date of Patent: February 5, 2013
    Assignee: Albany International Corp.
    Inventors: Ingvar Berndt Erik Klerelid, Ola Thomasson, Bo-Christer Aberg, Cary P Johnson, John J LaFond
  • Patent number: 8157967
    Abstract: An arrangement in screening apparatuses of the pulp and paper industry, including a conduit for removing reject formed in a screening process. The circulation of material is arranged between the reject removal conduit and the interior of the screening apparatus from the removal conduit into the interior of the screening apparatus via a conduit external to the screening apparatus. When such a by-pass flow is arranged for pulp via external circulation, heavy particles in the layer being diluted are allowed to be separated onto the bottom of the reject removal conduit and therethrough e.g. into a separate junk trap.
    Type: Grant
    Filed: March 16, 2007
    Date of Patent: April 17, 2012
    Assignee: Andritz Oy
    Inventors: Marko Pekkarinen, Eero Honkala
  • Patent number: 8132338
    Abstract: A paper machine configured as a swing machine capable of producing both light and heavy grades providing a Yankee hood split into a wet end half and a dry end half, at least one hood half being a flex-hood half wherein the supply for that half is capable of being run with either combustion heat or recycled heat and is capable of either recirculating the exhaust from the hood or discharging it to the atmosphere. The heater for the flex-hood half comprises both a primary combustion heat source and an indirect heat source capable of extracting by-product heat from another operation. The exhaust system for the flex hood half is capable of being run in either a straight through mode or in a recirculating mode.
    Type: Grant
    Filed: April 6, 2010
    Date of Patent: March 13, 2012
    Assignee: Georgia-Pacific Consumer Products LP
    Inventors: Charles E. Deem, Mark S. Hunter, Donald J. Hodkiewicz, Steven W. Monroe, Scott M. Thomson, Thomas H. Barrie, Timothy D. Jadin, Steven M. Gardner, Scott L. Giannunzio
  • Publication number: 20110240243
    Abstract: An apparatus for cleaning and cooling a liquor nozzle, the nozzle including at least a liquor tube for feeding liquor and chemicals into a furnace of a recovery boiler. The apparatus includes an outer casing tube, which defines a space whereto conduits are provided for introducing water and steam to generate an emulsion or a conduit for introducing emulsion generated by the water and steam and the surface of which is provided with openings, such as pores or holes, for discharging the emulsion formed by water and steam through the outer casing.
    Type: Application
    Filed: April 6, 2011
    Publication date: October 6, 2011
    Applicant: Andritz Oy
    Inventors: Markku TANTTU, Kari Saviharju, Sirpa Du Jardin
  • Patent number: 7901544
    Abstract: A paper machine fabric leader includes a leader having a first end, a second end, a first leader face and a second leader face, the first end being connected to a paper machine fabric; and a solid sheet cover attached to the first leader face of the leader. A method for making the paper machine fabric leader is also disclosed.
    Type: Grant
    Filed: January 17, 2007
    Date of Patent: March 8, 2011
    Assignee: Voith Paper GmbH
    Inventor: William Daniel Aldrich
  • Patent number: 7846297
    Abstract: A hood (10) is located above a web forming section (12), a press section (14) and/or a dryer section and includes a ceiling (30), a back side wall, and a front side wall (44), which includes staggered wall segments (42). The wall segments (42) are adapted to move along rails or similar. The front side wall segments (42) are adapted to form two or more groups (46). A cleaning station (40) is arranged to automatically clean the side wall segments (42) as they move past the cleaning station.
    Type: Grant
    Filed: May 29, 2007
    Date of Patent: December 7, 2010
    Assignee: Metso Paper, Inc.
    Inventors: Jyrki Buller, Samppa J. Salminen, Jussi Salojärvi, Jyrki Savela, Risto Väätänen
  • Patent number: 7662259
    Abstract: A method of dewatering a fabric includes contacting the fabric with an endless wicking substrate.
    Type: Grant
    Filed: August 25, 2008
    Date of Patent: February 16, 2010
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Michael Alan Hermans, Frank Stephen Hada
  • Publication number: 20090321031
    Abstract: A hood (10) is located above a web forming section (12), a press section (14) and/or a dryer section and includes a ceiling (30), a back side wall, and a front side wall (44), which includes staggered wall segments (42). The wall segments (42) are adapted to move along rails or similar. The front side wall segments (42) are adapted to form two or more groups (46). A cleaning station (40) is arranged to automatically clean the side wall segments (42) as they move past the cleaning station.
    Type: Application
    Filed: May 29, 2007
    Publication date: December 31, 2009
    Applicant: METSO PAPER, INC.
    Inventors: Jyrki Buller, Samppa J. Salminen, Jussi Salojãrvi, Jyrki Savela, Risto Vããtãnen
  • Patent number: 7494569
    Abstract: An apparatus for cleaning a papermachine fabric has a device for removing contaminants from a fabric. The device has a contact surface which comes into contact with at least an outer side of the fabric and which is constructed and arranged in such a way that the contaminants can be transferred from the fabric to the contact surface. The apparatus is particularly useful in the cleaning of dryer fabrics having sticky or tacky contaminants in paper production.
    Type: Grant
    Filed: November 17, 2005
    Date of Patent: February 24, 2009
    Assignee: Voith Paper Patent GmbH
    Inventors: Jiew Poh Liew, Antony Morton, Dwight Payne, Craig Valentine
  • Publication number: 20090038769
    Abstract: An arrangement in screening apparatuses of the pulp and paper industry, including a conduit for removing reject formed in a screening process. The circulation of material is arranged between the reject removal conduit and the interior of the screening apparatus from the removal conduit into the interior of the screening apparatus via a conduit external to the screening apparatus. When such a by-pass flow is arranged for pulp via external circulation, heavy particles in the layer being diluted are allowed to be separated onto the bottom of the reject removal conduit and therethrough e.g. into a separate junk trap.
    Type: Application
    Filed: March 16, 2007
    Publication date: February 12, 2009
    Applicant: ANDRITZ OY
    Inventors: Marko Pekkarinen, Eero Honkala
  • Patent number: 7452446
    Abstract: A fabric dewatering apparatus for use after a fabric cleansing apparatus in a paper machine including: an endless wicking substrate disposed for rotation about a dryer roll; the endless wicking substrate and the fabric brought into surface contact as the fabric traverses at least a portion of the dryer roll's circumference; and a wicking substrate dewatering apparatus disposed along the wicking substrate's travel path after the dryer roll.
    Type: Grant
    Filed: October 18, 2005
    Date of Patent: November 18, 2008
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Michael Alan Hermans, Frank Stephen Hada
  • Patent number: 7429310
    Abstract: A paper or board machine has a fabric (10) that is adapted mobile as well as rolls (11, 11?) arranged to support the fabric (10). The fabric (10) is tensioned by changing the position of one roll (11?) of the rolls (11, 11?). Correspondingly, the fabric (10) is guided by changing the alignment of one roll (11?) of the said rolls (11, 11?). Surprisingly the fabric (10) is both tensioned and guided by changing the alignment and position of only one and the same roll (11?). In addition, the wrap angle of the fabric (10) at this roll (11?) is set higher than 30°.
    Type: Grant
    Filed: May 4, 2004
    Date of Patent: September 30, 2008
    Assignee: Metso Paper, Inc.
    Inventors: Pertti K. Heikkilä, Erkki Kärkkäinen, Erkka Nieminen, Samppa J. Salminen, Veli-Matti Vainio
  • Patent number: 7427335
    Abstract: Described is a cleaning device for a band-like apparatus. It comprises a hollow rotatable roll supported to turn in the traveling direction of the band-like apparatus. The roll has a plurality of apertures formed in it, and cleaning fluid jet nozzles arranged at the inner side of the plurality of apertures. The cleaning device cleans the band-like apparatus by spraying a cleaning fluid re-at the band-like apparatus from the cleaning fluid jet nozzles. The cleaning device also comprises a plurality of blade plates.
    Type: Grant
    Filed: August 19, 2003
    Date of Patent: September 23, 2008
    Assignee: Aoki Machinery Co., Ltd.
    Inventor: Mitsuo Aoki
  • Patent number: 7384511
    Abstract: The invention relates to a device for changing the cloth of a paper machine, particularly a tissue machine, for example a TAD (through-air drying) machine, with a number of deflection rolls (3), (4), (5), (6) and at least one cleaning device (27), (28), (29) for the machine cloth. Levers (9), (20) are provided on either side of the machine cloth (7), where these levers hold at least one deflection roll (3), (4) and can be pivoted from an operating position to a machine cloth changing position. Thus, the time and the number of personnel required to change the machine cloth are reduced substantially.
    Type: Grant
    Filed: January 12, 2005
    Date of Patent: June 10, 2008
    Assignee: Andritz AG
    Inventors: Wilhelm Mausser, Gerald Schadler
  • Patent number: 7303655
    Abstract: An apparatus is provided for conditioning a fabric being advanced in a machine direction in a papermaking machine. The fabric has an outer side adapted to engage a paper web and an opposing inner side. Such an apparatus comprises a fluid-emitting device configured to wet the fabric with a fluid so as to clean the fabric. An arcuate member disposed downstream of the fluid-emitting device is configured to engage the outer side of the fabric. More particularly, the arcuate member is configured to have the fabric wrapped at least partially thereabout such that the advancing fabric is centrifugally dewatered. Associated systems and methods are also provided.
    Type: Grant
    Filed: September 9, 2004
    Date of Patent: December 4, 2007
    Assignee: Metso Paper Karlstad Aktiebolag (AB)
    Inventor: Dennis Edward Jewitt
  • Patent number: 7300551
    Abstract: A belt conditioning method, apparatus and paper machine employing the method and apparatus are provided. The belt method and apparatus include multiple conditioning devices using chemicals to condition water impermeable surfaces of paper machine belts, such as transfer belts and prevent deposits from accumulating on the belts. In one embodiment, the belt supports a web at a first portion of the belt's loop and is separated from the web at a second portion. The conditioning apparatuses are placed in the second portion.
    Type: Grant
    Filed: March 3, 2004
    Date of Patent: November 27, 2007
    Assignee: Nalco Company
    Inventors: David I. Weinstein, Peter E. Perry, James P. Rivard, Pawel Cirocki
  • Patent number: 7175744
    Abstract: An apparatus for the treatment of, in particular for vacuum action upon, the at least one wire or at least one felt band in a papermaking plant. The wire or felt band is moved in circulation by the apparatus, which, if appropriate, is connected to a vacuum source. The apparatus has a carrying device assigned to the wire or felt band and a multiplicity of supporting elements are disposed at a distance from one another.
    Type: Grant
    Filed: October 9, 2003
    Date of Patent: February 13, 2007
    Inventors: Klaus Bartelmuss, Heinz Bartelmuss
  • Patent number: 7112260
    Abstract: Device and process for cleaning a circulating belt, the device using a cleaning device having at least one nozzle. The process includes feeding a pressurized fluid to the at least one nozzle, and subjecting the circulating belt to the pressurized fluid via the at least one nozzle. The pressurized fluid has a temperature in a range of between approximately 90° C. and approximately 160° C.
    Type: Grant
    Filed: July 3, 2002
    Date of Patent: September 26, 2006
    Assignee: Voith Paper Patent GmbH
    Inventors: Karlheinz Straub, Michael Sollinger
  • Patent number: 7063772
    Abstract: Apparatus for treating a fibrous web that includes at least one supporting surface arranged to support a surface of the fibrous web, and at least one sealing device positionable adjacent a surface of the web opposite the surface of the web supported by the at least one supporting surface. The at least one sealing device includes a positionably adjustable sealing element. A distance between the positionably adjustable sealing element and the surface of the web opposite the surface supported by the at least one supporting surface is adjustable.
    Type: Grant
    Filed: July 26, 2002
    Date of Patent: June 20, 2006
    Assignee: Voith Paper Patent GmbH
    Inventors: Peter Kahl, Uwe Joos
  • Patent number: 7005039
    Abstract: A device for adjusting the position of the wiper strip on the screen in a papermaking plant regulates the contact pressure with which the wiper strip bears on the screen. The wiper strip is fixed to a supporting bar and the supporting bar is configured such that it can be moved with respect to the screen counter to the action of a spring device, in particular an air spring, in order to adjust its position with respect to the screen. A plurality of holding bars are provided along the supporting bar, that can be adjusted in terms of their effective thickness in relation to pressing the wiper strip against the screen.
    Type: Grant
    Filed: October 29, 2002
    Date of Patent: February 28, 2006
    Inventors: Klaus Bartelmuss, Heinz Bartelmuss
  • Patent number: 6972074
    Abstract: Equipment for fabric guiding in a paper machine has a fabric (10) and rolls (12–18) adapted to support it. In connection with the roll (17) end there is arranged equipment comprising a stand (19) and a nip guard (26). The stand (19) includes a transfer base (20) as well as transfer equipment (22) for moving the transfer base (20). The equipment further comprises an edge detector (23) for the roll (17) arranged on the opposite side of the fabric (10), for which edge detector there is a vertical bracket (25) arranged in the stand (19). The vertical bracket (25) and the nip guard (26) form an integrated sheet-metal construction.
    Type: Grant
    Filed: October 28, 2003
    Date of Patent: December 6, 2005
    Assignee: Metso Paper, Inc
    Inventors: Ville Nenonen, Samppa J. Salminen, Risto Väätänen
  • Patent number: 6955742
    Abstract: A shower device for a papermaking machine is provided which includes a longitudinally extending hollow member having an inlet end adapted for connection to a pressurized water source. A slot extends longitudinally along at least a portion of the hollow member. The slot includes opposing edges and a strip of material is slideably engageable with the hollow member so that the hollow member is substantially sealed along the edges of the slot when the strip is installed. The strip of material includes a plurality of spaced apart shower nozzles. This allows a plurality of shower nozzles on a papermaking machine to be quickly and easily replaced by slidably removing the nozzle strip from the slot and slidably inserting a replacement strip of nozzles into the slot.
    Type: Grant
    Filed: March 5, 2003
    Date of Patent: October 18, 2005
    Assignee: AstenJohnson, Inc.
    Inventors: Edward T. McKay, Karl J. Lemme
  • Patent number: 6929716
    Abstract: A method for the manufacture or treatment of a material web, in particular of a paper or a cardboard web, while using a respective machine, in particular a paper machine, including the step of measuring the hardness and/or the compactness of at least one clothing, in particular of at least one felt, fabric, belt and/or the like, of the machine.
    Type: Grant
    Filed: February 27, 2003
    Date of Patent: August 16, 2005
    Assignee: Voith Paper Patent GmbH
    Inventors: Rudolf Müch, Raymond P. Shead
  • Patent number: 6846385
    Abstract: A vibration-minimizing suspension mechanism for a press roll is provided. The press roll and an opposing roll each having a rotational axis and cooperate to form a press nip for imparting a linear load on a web passing therethrough. The linear load is oriented through the rotational axes of the press and opposing rolls. The suspension mechanism comprises a suspension arm having opposed ends and a medially-disposed pivot, wherein the rotational axis of the press roll is rotatably engaged with one of the opposed ends. The suspension arm is pivotably and adjustably mounted at the pivot to allow the pivot to be adjusted in substantially parallel relation to the linear load. The adjustable pivot thereby allowing a mounting line, defined by the pivot and the rotational axis of the press roll, to be maintained in substantially perpendicular orientation to the linear load to thereby minimize vibration in the press roll.
    Type: Grant
    Filed: February 20, 2004
    Date of Patent: January 25, 2005
    Assignee: Metso Paper Karlstad AB
    Inventor: Tord Gustavsson
  • Patent number: 6841037
    Abstract: A machine for producing a tissue web is provided, including a former having a forming region which includes at least one circulating, continuous dewatering wire having zonally variable wire permeability. Furthermore, a process for producing the tissue web in a tissue machine is provided. The process includes forming the tissue web in a forming region of a former, wherein the forming region includes at least one circulating, continuous dewatering wire having zonally variable wire permeability.
    Type: Grant
    Filed: January 26, 2001
    Date of Patent: January 11, 2005
    Assignee: Voith Paper Patent GmbH
    Inventors: Thomas Thoröe Scherb, Harald Schmidt-Hebbel
  • Publication number: 20040163787
    Abstract: An apparatus for the treatment of, in particular for vacuum action upon, the at least one wire or at least one felt band in a papermaking plant. The wire or felt band is moved in circulation by the apparatus, which, if appropriate, is connected to a vacuum source. The apparatus has a carrying device assigned to the wire or felt band and a multiplicity of supporting elements are disposed at a distance from one another.
    Type: Application
    Filed: October 9, 2003
    Publication date: August 26, 2004
    Inventors: Klaus Bartelmuss, Heinz Bartelmuss
  • Patent number: 6764578
    Abstract: A vibration-minimizing suspension mechanism for a press roll is provided. The press roll and an opposing roll each having a rotational axis and cooperate to form a press nip adapted to impart a linear load on a fiber web passing therethrough. The linear load is oriented through the rotational axes of the press roll and the opposing roll. As such, the suspension mechanism comprises a suspension arm having opposed ends and a medially-disposed pivot, wherein the press roll is rotatably engaged at the rotational axis thereof with one of the opposed ends of the suspension arm. The suspension arm is further pivotably and adjustably mounted at the pivot so as to allow the pivot to be adjusted in substantially parallel relation to the linear load.
    Type: Grant
    Filed: September 24, 2001
    Date of Patent: July 20, 2004
    Assignee: Metso Paper Karlstad AB
    Inventor: Tord Gustavsson
  • Patent number: 6746575
    Abstract: A doctor for a suction roll in a paper machine is intended to remove water from a suction roll. The doctor includes a doctor slat fitted against the surface of suction roll extending essentially over the entire width of the suction roll, as well as the doctor slat holder and loading devices. In the direction of rotation of the suction roll, there is a doctor blade, with a blade holder fitted to the doctor after the doctor slat. The doctor blade is arranged to remove the water lifted off the suction roll by the doctor slat.
    Type: Grant
    Filed: May 3, 2001
    Date of Patent: June 8, 2004
    Assignee: Metso Paper, Inc.
    Inventors: Tuomo Juvakka, Jouko Pussinen
  • Patent number: 6733633
    Abstract: A leader which is used to pull a seamable papermaker's fabric onto a paper machine comprising a ravel area for securing pull ropes or cables thereto.
    Type: Grant
    Filed: June 21, 2002
    Date of Patent: May 11, 2004
    Assignee: Albany International Corp.
    Inventor: Michael J. Josef
  • Patent number: 6681467
    Abstract: In processing web material, the material is passed through a guiding arrangement which has a plurality of guide elements. In order to enable removing the guide element for repair without disturbing the web material, each of the guide elements is provided with a lifting arrangement which is concentric to the guide element and is movable from one angular position withdrawn from the path of the elongated material engaging the guide element to a second position lifting the elongated material off of the guide element so that the guide element can be axially withdrawn from the machine.
    Type: Grant
    Filed: March 5, 2002
    Date of Patent: January 27, 2004
    Assignee: Océ Printing Systems GmbH
    Inventors: Werner Fuchs, Stefan Brecht
  • Patent number: 6673210
    Abstract: A method of cleaning a semipermeable membrane, the semipermeable membrane being configured for carrying a fiber web, includes the steps of providing a cleaning fluid and applying the cleaning fluid on the semipermeable membrane. Further, an air press configured for carrying the semipermeable membrane therethrough is provided, and the air press has pressurized air therein. The semipermeable membrane is conveyed through the air press and is subjected to the pressurized air within the air press. The pressurized air thereby flushes the cleaning fluid through the semipermeable membrane.
    Type: Grant
    Filed: September 27, 2001
    Date of Patent: January 6, 2004
    Assignee: Voith Paper Patent GmbH
    Inventor: David A. Beck
  • Patent number: 6669817
    Abstract: A device (10) for use in connection with a fabric (F) in a former or a press section of a paper machine comprises sub-assemblies which accomplish at least two of the following functions: guiding, spreading and/or cleaning of the fabric (F). The device (10) has an automatic guide (20) and a guide roll (40) for guiding the fabric (F), a curved spreader roll (30) for spreading the fabric (F), and a suction unit 19 for cleaning the fabric (F).
    Type: Grant
    Filed: August 17, 2001
    Date of Patent: December 30, 2003
    Assignee: Metso Paper, Inc.
    Inventor: Jyrki Savela
  • Patent number: 6592721
    Abstract: An air delivery device is provided for dewatering a suction roll in a paper machine by applying pressurized air to expel residual water or debris outwardly from through-holes. The air delivery device is positioned at a suitable circumferential position of the suction roll to prevent water carryover back to the suction box location. In one preferred embodiment, an internal blowbox is mounted near the inner surface of the suction roll for blowing out water from the suction roll holes to augment the natural centrifugal forces. The blowbox can be used as a standalone dewatering unit, or in conjunction with an external doctor blade or wipe. In another preferred embodiment, at least one air knife, air pipe or air shower is used for dewatering. In another preferred embodiment, at least one interior stationary air foil is used to generate a pressure pulse which creates outward air flow through the through-holes.
    Type: Grant
    Filed: May 11, 2000
    Date of Patent: July 15, 2003
    Assignee: International Paper Company
    Inventors: D. W. Anderson, Robert H. Herring
  • Publication number: 20030034138
    Abstract: Apparatus for treating a fibrous web that includes at least one supporting surface arranged to support a surface of the fibrous web, and at least one sealing device positionable adjacent a surface of the web opposite the surface of the web supported by the at least one supporting surface. The at least one sealing device includes a sealing element and a holder structured and arranged to hold and to enable lateral sliding movement of the at least one sealing device cross-wise to a web travel direction.
    Type: Application
    Filed: July 26, 2002
    Publication date: February 20, 2003
    Applicant: VOITH PAPER PATENT GmbH
    Inventors: Peter Kahl, Uwe Joos
  • Publication number: 20030034139
    Abstract: Apparatus for treating a fibrous web that includes at least one supporting surface arranged to support a surface of the fibrous web, and at least one sealing device positionable adjacent a surface of the web opposite the surface of the web supported by the at least one supporting surface. The at least one sealing device includes a positionably adjustable sealing element. A distance between the positionably adjustable sealing element and the surface of the web opposite the surface supported by the at least one supporting surface is adjustable.
    Type: Application
    Filed: July 26, 2002
    Publication date: February 20, 2003
    Applicant: Voith Paper Patent GmbH
    Inventors: Peter Kahl, Uwe Joos
  • Patent number: 6491791
    Abstract: A method is disclosed for cleaning roll surfaces on a paper-making machine or the like, particularly the grooves and drilled perforations of the rolls, and/or supported fabrics and/or for improving water drainage therein. According to the method, the properties of a moving roll surface (1) and/or fabric (6), as well as their behavior during a run, are affected by means of a gas mixture (5) in a manner, wherein the flow of the gas mixture is caused to be directed substantially toward the roll surface (1), grooves (2) made on the roll shell, perforations (2) of the roll shell and/or the fabric (6) or, alternatively, at least to a close proximity of at least one of the foregoing objects. The invention also relates to an apparatus suited for implementing the method.
    Type: Grant
    Filed: March 26, 2001
    Date of Patent: December 10, 2002
    Assignee: Runtech Systems Oy
    Inventor: Kimmo Loippo
  • Publication number: 20020179263
    Abstract: A method to remove scale build-up in a vessel having at least one screen is described and involves placing a cover inside the vessel such that it is located beneath at least one screen to separate the screen from the rest of the vessel. The cover in the vessel forms an upper portion and a lower portion in the vessel. Preferably, the cover is in close proximity to the screen which is located in the upper portion of the vessel. The method then further includes introducing a chemical formulation into the upper portion of the vessel in a sufficient amount to remove at least a portion of the scale build-up on the screen. A system to remove scale build-up is also described and includes a vessel having at least one screen. The system further includes a cover located inside the vessel and beneath at least one screen to separate the screen from the rest of the vessel and to form an upper portion and a lower portion in the vessel. Normally the cover is in close proximity to the screen.
    Type: Application
    Filed: April 15, 2002
    Publication date: December 5, 2002
    Inventor: Goh Hock Eng
  • Patent number: 6451171
    Abstract: A device is provided for dewatering a fabric in which the fabric is used in a papermaking process that exposes it to water before it is directed to the fabric dewatering device. The fabric dewatering device includes leading and trailing guide rolls about which the fabric is partially wrapped to form a loop portion. The loop portion is suspended between the leading and trailing guide rolls and includes a trough portion with a relatively small diameter that is positioned below the axes of the guide rolls. Running the fabric through the trough portion at high speeds exposes the water trapped therein to high centrifugal forces. The centrifugal forces expel the water from the fabric. The geometry and positioning of the trough portion is maintained either through a difference in fabric speed maintained by the leading and trailing nips or by the use of a rider roll positioned within the loop.
    Type: Grant
    Filed: January 9, 2002
    Date of Patent: September 17, 2002
    Assignee: Metso Paper Karlstad AB
    Inventor: Dennis Edward Jewitt
  • Patent number: 6447873
    Abstract: A leader used to pull a seamable papermaker's fabric onto a paper machine comprising at least one section of material comprising yarns which are so oriented so as to distribute the load evenly across and down the fabric.
    Type: Grant
    Filed: August 31, 1999
    Date of Patent: September 10, 2002
    Assignee: Albany International Corp.
    Inventor: Glenn Kornett
  • Publication number: 20020092637
    Abstract: An apparatus (62) and method for supporting a web (22) of paper being transferred through a region (40) from the surface (26) of one moving component (24) of a papermachine (20) to the surface (30) of a subsequent moving component (28) of the papermachine utilizes an air-permeable sheet (70) and a blowbox (86) or Coanda air knives (38) supported adjacent the air-permeable sheet. The sheet is supportable in a stationary condition across so as to span at least a portion of the papermachine region through which the moving web of paper is transferred and adjacent one side (72) of the web, and the blowbox or Coanda air knives are used to move air away from the side (72) of the air-permeable sheet opposite the web so that as the web is moved through the papermachine region, the web is biased by atmospheric air pressure into contact with the air-permeable sheet and moves in sliding engagement therealong.
    Type: Application
    Filed: January 12, 2001
    Publication date: July 18, 2002
    Inventors: Paul Rouhiainen, Michael John Vaner Wielen, Robert J. Marinack, James R. Benson
  • Publication number: 20020050329
    Abstract: A support for a web forming machine which allows for vertical adjustment of a web forming belt with respect to at least one die head positioned above the web forming belt, and allows for tilting of the web forming belt. The support allows linear motion along a y-axis defined by a length of a guide shaft while preventing linear motion along a x-axis and a z-axis, e.g. the two axes perpendicular to the y-axis. Further, the support allows rotational or axial motion about the x-axis perpendicular to the y-axis but prevents rotational or axial motion about the y-axis and the z-axis.
    Type: Application
    Filed: October 17, 2001
    Publication date: May 2, 2002
    Inventors: Michael C. Cook, Stephen T. Farmer
  • Patent number: 6136149
    Abstract: Press section in a paper machine and method for replacing press fabrics therein including two separate press nips and a frame part for each press nip. Side frames of both frame parts are interconnected by upper horizontal beams in the machine direction. The upper horizontal beam at the tending side is comprised of two beam parts of which one is situated above the side frames of the frame part of the first nip at the tending side and the other is situated above the side frames of the frame part of the second nip at the tending side. The tending-side beam parts operate as a machine-direction cantilever beam so that a first beam part is supported on the second beam part and thereby on its frame part while the side frames of the first frame part are open for replacement of the fabrics in the first nip. The beam parts operate reciprocally with each other in inverse functions as a cantilever beam and as a support part when the press fabrics in the second nip are being replaced.
    Type: Grant
    Filed: April 26, 1999
    Date of Patent: October 24, 2000
    Assignee: Valmet Corporation
    Inventor: Oiva Vallius
  • Patent number: 6136148
    Abstract: A method and apparatus for cleaning a drying fabric of a paper machine. In the method a cleaning liquid is introduced into a gap (3) defined by the roll or cylinder (2) of a paper machine and a fabric (1) being fed onto the roll or cylinder. The cleaning liquid is pressed between the roll or cylinder (2) and the fabric (1) and is carried along with the fabric and is spread along the whole width of the fabric. The apparatus includes means for introducing and spreading the cleaning liquid into the gap between the roll and cylinder (2) and the drying fabric and, optionally, includes means (6) for collecting the cleaning liquid.
    Type: Grant
    Filed: October 14, 1997
    Date of Patent: October 24, 2000
    Assignee: EV Group Oy
    Inventors: Pekka Koskinen, Timo Haverinen
  • Patent number: 6027613
    Abstract: Suction device for use in a machine for producing a sheet and a method to vacuum a web section of a paper machine. The suction device includes a contact surface to place on the web section and a suction box. The suction box is designed to have a vacuum pressure applied to drain the web section. The suction device further includes a control device and a release mechanism or an adjustment mechanism for releasing the suction box from the web section while the vacuum pressure is applied or thereafter so that the web section is guided along the contact surface with less friction and without the web section detaching from the contact device. A method to suction a web section in a paper machine including arranging a contact surface a suction device on the web section and applying a vacuum pressure to the suction device to vacuum the web section.
    Type: Grant
    Filed: November 25, 1997
    Date of Patent: February 22, 2000
    Assignee: Voith Sulzer Papiermaschinen GmbH
    Inventors: Karl Steiner, Hans Prinzing
  • Patent number: 5961735
    Abstract: A method of treating a felt to remove contaminants therein comprises the steps of providing a felt used in transporting paper webs, preparing an enzyme solution comprising an enzyme selected from the group consisting of a cellulase, a hemicellulase, and mixtures thereof, applying the enzyme solution to the felt for a first predetermined period of time, rinsing the felt with water, applying a solution of sodium hydroxide to the felt to remove the enzyme solution, and rinsing the felt with water to remove the sodium hydroxide solution thereby removing the contaminants in the felt.
    Type: Grant
    Filed: June 5, 1997
    Date of Patent: October 5, 1999
    Assignee: North Carolina State University
    Inventors: John A. Heitmann, Jr., Thomas W. Joyce
  • Patent number: 5958190
    Abstract: A cleaning apparatus is disclosed for cleaning a forming wire of a paper machine. The apparatus includes a shower which is disposed adjacent to the forming wire for applying a shower of cleaning fluid to the wire. A blow box is disposed closely adjacent to the forming wire and downstream relative to the shower. The box is connected to a source of pressurized air for blowing a jet of air through the wire for removing the cleaning fluid therefrom. A plate is disposed between the box and the wire. The plate defines a plurality of slots which are disposed obliquely to a direction of movement of the wire in order to supply a multiplicity of pressure pulses to the wire for removing contaminants therefrom.
    Type: Grant
    Filed: June 25, 1997
    Date of Patent: September 28, 1999
    Assignee: Beloit Technologies, Inc.
    Inventors: Matthew L. Gregersen, Paul P. Newton, David E. Oldenburg, Jeffrey H. Pulkowski, Jay Shands
  • Patent number: 5900117
    Abstract: A papermachine clothing cleaning apparatus has a fluid injection nozzle with an apertured plate (14). The injection nozzle directs fluid onto the papermachine clothing (11) in order to clean the clothing. The areas of papermachine clothing that are adjacent the areas of clothing being impacted by the fluid are located in a press formed by the apertured plate (14) and a body (15) provided at the opposite surface of the fabric (11).
    Type: Grant
    Filed: April 17, 1997
    Date of Patent: May 4, 1999
    Assignee: Scapa Group PLC
    Inventor: Per-Ola Lidar
  • Patent number: 5888351
    Abstract: A paper making machine for producing a continuous traveling fiber material web includes a roll having a longitudinal axis and two longitudinal ends. Each end has a concentric first circular gear with a plurality of radially outwardly facing teeth. A felt is carried by the roll. The paper making machine also includes a pair of parallel lower elongated racks extending substantially perpendicular to the longitudinal axis of the roll. Each lower elongated rack includes a plurality of teeth carrying and meshing with the teeth of a respective first circular gear. The roll is rotatably movable with respect to the lower racks in two opposite directions along and parallel to the lower racks and transverse to the longitudinal axis of the roll. A first of the two opposite directions is toward the felt.
    Type: Grant
    Filed: September 22, 1997
    Date of Patent: March 30, 1999
    Assignee: Voith Sulzer Paper Technology North America, Inc.
    Inventors: Edwin X. Graf, William Witte
  • Patent number: 5879514
    Abstract: A scraper device for a paper machine comprises first and second scraper means that can be pivoted into engagement with a fabric web and with a guide roll, respectively. By combining at least two scraper means in a common assembly, a particularly compact and cost-saving structure is achieved. Due to the fact that the first scraper means is arranged upstream of the guide roll, viewed in the direction of travel of the fabric web, and that it can be pivoted into engagement with the fabric web from below in a manner such that a downwardly open space is left, it is guaranteed that the paper residues will be carried off completely even in case of trouble, for example in case of web failure.
    Type: Grant
    Filed: March 20, 1997
    Date of Patent: March 9, 1999
    Assignee: Voith Sulzer Papiermaschinen GmbH
    Inventor: Andreas Meschenmoser
  • Patent number: 5792349
    Abstract: In order to create a rotating drum filter with a filter medium that is extremely fine-meshed and nonetheless has a long service life, whereby the filter medium need not be completely replaced given localized damage thereto, it is inventively proposed that the filter medium be formed of a composite element body with at least two metallic layers, namely with an extremely finely porous, outer metal layer or, respectively, stainless steel fabric that is firmly applied onto at least one metallic supporting grid layer or, respectively, onto a stainless steel fabric layer that is coarse-meshed compared thereto.
    Type: Grant
    Filed: December 9, 1996
    Date of Patent: August 11, 1998
    Assignee: Kloeckner-Humboldt-Deutz AG
    Inventors: Rolf Buettner, Rainer Bonn