Extended Nip Press Patents (Class 162/358.3)
  • Patent number: 6702928
    Abstract: The invention relates to a press roll (1) comprising a flexible rotating endless-loop blanket (3) of a liquid-impervious material, two disc-shaped roll heads (4, 5), and a clamp element (14) filled with a pressurized medium for clamping the lateral rims (21) of the blanket (3) to the respective ones (4, 5) of the roll heads. The invention is implemented by adapting between the pressurized-medium-filled clamp element (14) and the blanket (3) an annular ring (18) serving to press the rim of the blanket (3) during the pressurization of said clamp element against the inner rim surface (15) of a sector plate (7) and, respectively, serving to contract the clamp element (14) when the pressure of the clamp element (14) is removed or lowered.
    Type: Grant
    Filed: July 1, 2002
    Date of Patent: March 9, 2004
    Assignee: Vaahto Oy
    Inventor: Erkki Aho
  • Patent number: 6699362
    Abstract: Fine paper is manufactured in a paper machine by feeding stock into a headbox (100) from a short circulation the stock volume of which has been minimized, water is removed from the paper web (W) most advantageously in a gap former (250), in the press section (300) water is pressed out of the paper web (W) in an extended nip press (360), in the dryer section (400) impingement drying (450) is employed for the drying of the paper web (W), the paper web (W) is pre-calendered in a calender (900) employing low nip loads, both surfaces of the paper web (W) are precoated at the same time, after precoating (500) the paper web (W) is dried by means of contact-free drying (660), the paper web (W) is coated in an on-line coating station/stations (700, 800), after which the paper web (W) is at least partly dried in a drying section/sections (750, 850) by means of contact-free drying of the paper web (W), and the paper web (W) is calendered in an on-line calender (900) while the linear load in each nip is regulated separat
    Type: Grant
    Filed: April 15, 2002
    Date of Patent: March 2, 2004
    Assignee: Metso Paper, Inc.
    Inventor: Pentti Rautiainen
  • Patent number: 6669821
    Abstract: The present invention is a method for maximizing water removal from an absorbent web in a press nip. The present invention uses a pressing unit having a blanket with a void volume and with a pressure profile that maximizes water removal in the press section or on the Yankee dryer of a paper machine. The pressure profile of the pressing unit according to the present invention has a very steep pressure drop at and/or following the exit of a pressure distribution curve in order to maximize water removal by minimizing rewet of the web. The improved pressure profile according to the present invention results in increased water removal and/or improved line speed. The void volume further increases water removal and/or improves line speed.
    Type: Grant
    Filed: November 14, 2001
    Date of Patent: December 30, 2003
    Assignee: Fort James Corporation
    Inventors: Steven L. Edwards, Robert J. Marinack, Jeffrey Charles McDowell, Gary L. Worry
  • Patent number: 6666954
    Abstract: Pressing arrangement having two press rolls forming at least one press nip for dewatering a web, and two dewatering belts arranged to be guided through the at least one press nip with the web. The dewatering belts positioned on opposite sides of the web to absorb water. A common guidance path, formed by the dewatering belts guiding the web, is located after the at least one press nip. A separating roll and a lower one of the dewatering belts is arranged to wrap the separating roll along with the web at an end of the common guidance path. An upper one of the dewatering belts is arranged to be guided away from the web in a separation path in a region of the separating roll. Lower dewatering belt and web wrap the separating roll subsequent to the separation path at a wrapping angle of at least about 30°.
    Type: Grant
    Filed: March 8, 2001
    Date of Patent: December 23, 2003
    Assignee: Voith Paper Patent GmbH
    Inventors: Gerhard Kotitschke, Wolfgang Mayer, Roland Mayer
  • Publication number: 20030226650
    Abstract: The present invention is a method for maximizing water removal from an absorbent web in a press nip. The present invention uses a pressing unit having a blanket with a void volume and with a pressure profile that maximizes water removal in the press section or on the Yankee dryer of a paper machine. The pressure profile of the pressing unit according to the present invention has a very steep pressure drop at and/or following the exit of a pressure distribution curve in order to maximize water removal by minimizing rewet of the web. The improved pressure profile according to the present invention results in increased water removal and/or improved line speed. The void volume further increases water removal and/or improves line speed.
    Type: Application
    Filed: March 3, 2003
    Publication date: December 11, 2003
    Applicant: Fort James Corporation
    Inventors: Steven L. Edwards, Robert J. Marinack, Jeffrey Charles McDowell, Gary L. Worry
  • Patent number: 6638395
    Abstract: Machine and process for at least one of producing and finishing a fibrous material web. The machine includes a press section, for dewatering the fibrous web, with a press nip, a former, located before, relative to a web travel direction, the press section for sheet formation, and a dryer section, located after the press section for drying the fibrous material web including a first dryer section having no more than three dryer cylinders. Two press rolls are arranged to form the press nip, and at least one press felt is located on each surface of the material web, such that the material web and the at least one press felt on each side of the material web are guided through the press nip. The fibrous material web is dewatered in the former to a dry content of at least approximately 18%, partially loops around the no more than three dryer cylinders, and is constantly supported from the former to an end of the first dryer group.
    Type: Grant
    Filed: June 9, 2000
    Date of Patent: October 28, 2003
    Assignee: Voith Sulzer Papiertechnik Patent GmbH
    Inventor: Thomas Elenz
  • Publication number: 20030183359
    Abstract: Press shoe of a shoe press unit and a machine including press shoe. The press shoe includes at least two lateral edge areas, which are structured and arranged to be positioned adjacent web edges, and a central area lying between the at least two lateral edge areas. At least in some sections of the at least two lateral edge areas are structured to have a lower bending stiffness than in the central area. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.
    Type: Application
    Filed: March 26, 2003
    Publication date: October 2, 2003
    Applicant: VOITH PAPER PATENT GMBH
    Inventor: Thomas Thoroe Scherb
  • Publication number: 20030168195
    Abstract: A shoe press for a papermaking machine having clamping means mounted onto the head from the end thereof remote from the blanket. In one embodiment, the head itself is provided with a wedge surface in engagement with respective inclined surfaces of wedge segments and the blanket extends between these wedge segments and opposing surfaces provided on the clamping means. Axial displacement of the clamping means relative to the head, e.g. by tightening or releasing of bolts, then causes the blanket to be clamped between the wedge segments and the clamping means or to be released and removable therefrom. In another embodiment, it is the clamping means which is provided with wedge surfaces in engagement with respective inclined surfaces of wedge segments, and the blanket then extends between the wedge segments, and an opposing flat surface on the head. However, in other respects axial displacement of the clamping means brings about clamping or release of the blanket edge in the same manner.
    Type: Application
    Filed: September 23, 2002
    Publication date: September 11, 2003
    Applicant: Sandusky Walmsley Limited
    Inventor: Mark Antony Porter
  • Publication number: 20030168193
    Abstract: Machine and process for the production of a tissue web that includes a drying cylinder and a press shoe arrangement. The press shoe arrangement and the drying cylinder are arranged to form a nip with lateral edge areas. A plurality of contact pressing elements are arranged to exert pressing pressures across the nip, a measuring device is structured and arranged to measure pressing pressures resulting in at least the lateral edge areas, and at least one of a control and regulating device is structured and arranged to locally adjust the pressing pressures in the lateral edge areas by adjusting pressing pressures exerted by contact pressing elements assigned to the lateral edge areas. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.
    Type: Application
    Filed: March 3, 2003
    Publication date: September 11, 2003
    Applicant: Voith Paper Patent GmbH
    Inventor: Thomas Thoroe Scherb
  • Patent number: 6616813
    Abstract: Pressing arrangement for treating a fibrous material web that includes opposing surface and shoe press roll including non-rotationally mounted carrier, flexible pressing jacket arranged to circulate around carrier, and at least one press shoe supported on carrier. The at least one press shoe is arranged to press flexible pressing jacket against opposing surface. Shoe press roll and opposing surface are arranged to form press nip elongated in jacket travel direction, and the at least one press shoe includes outlet arranged to extend beyond, in jacket travel direction, an end of press nip. The at least one press shoe is arranged to press pressing jacket against opposing surface such that, in a region of press nip, pressing jacket is moved radially outside of a circular path formed by pressing jacket in an unstressed state, and pressing jacket is arranged to rest against a free end of outlet.
    Type: Grant
    Filed: August 7, 2001
    Date of Patent: September 9, 2003
    Assignee: Voith Paper Patent GmbH
    Inventor: Gerd Komposch
  • Patent number: 6616810
    Abstract: A device for dewatering a pulp web having a dewatering section comprising top and bottom wires forming a wedge-shaped dewatering zone which can be adjusted and/or pressure-loaded at the downstream end, and with a pair of press rolls mounted at the end of the bottom wire. The top roll of the pair of press rolls is a shoe press roll.
    Type: Grant
    Filed: September 28, 2001
    Date of Patent: September 9, 2003
    Assignee: Andritz AG
    Inventors: Edgar Brogyanyi, Karl Hornhofer, Wilhelm Mausser, Franz Petschauer, Johann Sbaschnigg
  • Patent number: 6613194
    Abstract: A web of tissue is formed in a twin wire former, followed by an air press for water removal in the pressing section, passing onto a Yankee dryer. A headbox injects stock between upper and lower dryer fabrics brought together on a breast roll. The fabrics move over vacuum boxes, and the web is heated with steam and passed between an upper pressure box and a lower vacuum box forming an air press which dewaters the web. A sheet transfer pickup vacuum box holds the sheet to the upper fabric as the lower fabric diverges from the upper fabric. A pressure roller transfers the web onto a Yankee dryer. The fabrics are cleaned on vertical runs before returning to the breast roll.
    Type: Grant
    Filed: September 30, 2002
    Date of Patent: September 2, 2003
    Assignees: Metso Paper, Inc., Mitsubishi Heavy Industries, Ltd.
    Inventors: Roger A. Kanitz, Thomas D. Rogers
  • Publication number: 20030145971
    Abstract: In a shoe press apparatus of a papermaking machine, a press part comprises a roll which serves as a pressing member and a shoe. A belt is sandwiched between the roll and the shoe. A lubricant feeder supplies a lubricant from the outside of the shoe at the upstream side of the shoe. A lubricant holding section, comprising a plurality of grooves is provided on the upstream end of the shoe. Lubricant supplied from the lubricant feeder is held in the lubricant holding section of the shoe, and is more reliably supplied to the press part as the belt runs through the press part. The Structure of the lubricant holding section is comparatively simple, and the lubricant holding section decreases friction, thereby saving energy.
    Type: Application
    Filed: January 29, 2003
    Publication date: August 7, 2003
    Inventor: Kazumasa Watanabe
  • Patent number: 6592719
    Abstract: A shoe press head indexing system wherein axial tension is applied to a blanket in a shoe press of a papermaking machine by means of respective fluid actuated piston and cylinder assemblies which are mounted inside the blanket and apply axial pressure to the first and second heads between which the blanket is mounted. Neither head is fixed or limited in position at any time. The respective fluid assemblies include respective displacement sensors whereby the positions of the heads, and thereby of the blanket, relative to the press can be determined and monitored. Automatic adjustments can then be made to the pressure in the assemblies and hence to the positions of the heads to maintain the blanket in substantially central position on the press.
    Type: Grant
    Filed: September 23, 2002
    Date of Patent: July 15, 2003
    Assignee: Sandusky Walmsley Limited
    Inventor: Mark Anthony Porter
  • Patent number: 6589393
    Abstract: A press arrangement for treating a fibrous web, especially a paper or board web, comprises at least two press rolls to form at least one press nip. At least one press roll is mounted on at least one roll end by means of a floating bearing, whose bearing rings, arranged inside the bearing housing, can be displaced relative to each other in the direction of the roll axis.
    Type: Grant
    Filed: March 17, 2000
    Date of Patent: July 8, 2003
    Assignee: Voith Sulzer Papiertechnik Patent GmbH
    Inventor: Andreas Meschenmoser
  • Patent number: 6589390
    Abstract: Press section of a machine for producing a fiber material, web and process for guiding a fiber material web through the press section. The press section includes at least two double-felted presses arranged in series in a travel direction of the fiber material web. An upstream one of the at least two double-felted presses may include a deflection-controlled shoe press roll and a suction roll, and the deflection-controlled shoe press roll and the suction roll may be arranged to form an upstream press nip. The process may include guiding the fiber material web through a press nip of an upstream one of the at least two double-felted presses formed by a deflection-controlled shoe press roll and a suction roll.
    Type: Grant
    Filed: January 15, 1999
    Date of Patent: July 8, 2003
    Assignee: Voith Sulser Papiertechnik Patent GmbH
    Inventor: Wolfgang Mayer
  • Patent number: 6585858
    Abstract: An apparatus for calendering a sheet material web being carried on or between one or more carrier fabrics. In a preferred embodiment, the apparatus includes a calender section having first and second calender rolls forming a nip therebetween. At least one carrier fabric is disposed between the first and second calender rolls. The first and second calender rolls apply a load to the carrier fabric and sheet material web as they pass through the nip between the calender rolls so as to reduce the caliper, or thickness, of the sheet material web. A method for calendering the sheet material web includes carrying the sheet material web on one or more carrier fabrics through the calender nip formed by the first and second calender rolls and applying a load to the carrier fabric, and sheet material carried thereby, so as to reduce the thickness of the sheet material web.
    Type: Grant
    Filed: September 25, 2000
    Date of Patent: July 1, 2003
    Assignee: Kimberly-Clark Worldwide, Inc.
    Inventors: Kurt T. Otto, James M. Perkins
  • Patent number: 6582561
    Abstract: Apparatus for forming an extended nip between a heated mating roll and a shoe roll for treating a product web, especially a paper web, the shoe roll having a stationary support and a flexible belt which can rotate about the support and, in the area of the extended nip, is supported on a shoe which is guided on the support, forms a press section and has an effective shoe width, and the belt having end sections which are fixed to end walls that are rotatably mounted on the support, in each case at the ends and axially adjacent to but at a distance from a mating face located opposite the effective shoe width of the shoe, the mating roll having a radially protruding support ring, which forms an opposing bearing for the direct support of an outer belt section on the mating roll and consists of a thermally insulating material.
    Type: Grant
    Filed: August 13, 2002
    Date of Patent: June 24, 2003
    Assignee: Eduard Kusters Maschinenfabrik GmbH & Co. KG
    Inventor: Brendel Bernhard
  • Publication number: 20030098134
    Abstract: Process and apparatus for producing a fibrous web in an apparatus that includes at least one nip formed between a smooth roll and at least one opposing element, a felt and an embossing belt. The process includes guiding the fibrous web and the felt through the at least one press nip formed between the smooth roll and the at least one opposing element, and passing the fiber web, in an unsupported manner, over a free draw from the smooth roll onto an embossing belt. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.
    Type: Application
    Filed: November 20, 2002
    Publication date: May 29, 2003
    Applicant: Voith Paper Patent GmbH
    Inventors: Thomas Thoroe Scherb, Luiz Carlos Da Silva
  • Publication number: 20030094256
    Abstract: Shoe roll for dewatering or calendering a moving fibrous web. The shoe roll includes a flexible, replaceable press cover having two end regions and at least one end supporting disc. At least one of the two end regions have reinforcing inlays and are releasably coupled to the at least one end supporting disc. A quick-acting closure, located between an inner wall of the at least one end region and the at least one end supporting disc, includes a radially pressing element structured to exert a pressing force and to simultaneously seal an interior of the shoe roll from an external environment. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.
    Type: Application
    Filed: November 21, 2002
    Publication date: May 22, 2003
    Applicant: Voith Paper Patent GmbH
    Inventor: Helmut Heinzmann
  • Publication number: 20030089480
    Abstract: A web (W) passes through a press section having two separate press nips (N1, N2). At least the first press nip (N1) has two water-receiving press felts (31, 41). After the first nip (N1), the web (W) is separated from one press felt (31/41) and transferred on support of the opposite press felt (41/31) through the second press nip (N2). One roll of the first nip (N1) is a press suction roll (11, 110) and the web (W) is transferred to follow the press felt (31, 41) on the side of said press suction roll (11, 110) by means of an underpressure in a suction zone (11a, 110a) of said press suction roll (11, 110). The press felt (31, 41) on the side of the press suction roll (11, 110) is also passed through the second nip (N2) of the press section.
    Type: Application
    Filed: October 22, 2002
    Publication date: May 15, 2003
    Inventors: Petter Honkalampi, Petteri Halme, Juhani Pajula
  • Publication number: 20030079849
    Abstract: A shoe roll (1) of a shoe press is disclosed for use in a paper-making machine, the shoe roll comprising a blanket, or an endless belt, which houses a shoe assembly that in cooperation with an external backing roll forms an extended nip proper and the shoe press including an oil circulation piping system (10, 11) performing the removal of oil from the interior of the shoe roll (1) to an oil trap during the running of the machine, whereby the piping system also comprises a suction fan connected thereto. The invention is implemented by way of connecting to the oil circulation piping (10, 11) an oil siphon (9) adapted movable along the blanket in the interior of the shoe roll (1) so that the excess oil can be removed by means of the siphon during the time the roll is stopped from the interior of the blanket by a pressure differential generated by of the suction fan.
    Type: Application
    Filed: October 16, 2002
    Publication date: May 1, 2003
    Inventor: Erkki Aho
  • Patent number: 6554964
    Abstract: A shoe press comprises a shoe support device mounted downstream of the press shoe of the shoe press to carry forces acting on the press shoe and having a first support element that has a support surface facing the press shoe and is fixedly connected to a stationary stand of the shoe press, and a second support element in the form of at least one rolling body arranged in a space between the support surface of the first support element and an opposite support surface of the press shoe to be in contact with the two support surfaces during operation. The rolling body is arranged to roll along the two support surfaces when the press shoe is moved relative to a second support element in the shoe press, while rotating about an axis of rotation that moves in relation to and in the same direction as the press shoe.
    Type: Grant
    Filed: September 12, 2002
    Date of Patent: April 29, 2003
    Assignee: Metso Paper Karlstad AB
    Inventor: Erik Brox
  • Publication number: 20030062141
    Abstract: A paper or cardboard machine press section includes sequentially arranged first, second, and third presses each having opposed first and second press members forming a press nip therebetween. A press felt is arranged in a loop and passes through the press nip of the third press. An impermeable transfer belt is arranged in a loop to receive the web from the second press and transfer it to the press felt of the third press. A wet calender defining at least one roll nip is provided between the second and third presses, and the web and the transfer belt pass through the roll nip of the wet calender. In a preferred embodiment, the roll nip of the calender is formed by a smooth press roll of the second press arranged outside the loop of the transfer belt, and a guide roll that is arranged within the loop of the transfer belt.
    Type: Application
    Filed: September 12, 2002
    Publication date: April 3, 2003
    Inventor: Per Anders Artur Leandersson
  • Publication number: 20030034140
    Abstract: Apparatus for forming an extended nip between a heated mating roll and a shoe roll for treating a product web, especially a paper web, the shoe roll having a stationary support and a flexible belt which can rotate about the support and, in the area of the extended nip, is supported on a shoe which is guided on the support, forms a press section and has an effective shoe width, and the belt having end sections which are fixed to end walls that are rotatably mounted on the support, in each case at the ends and axially adjacent to but at a distance from a mating face located opposite the effective shoe width of the shoe, the mating roll having a radially protruding support ring, which forms an opposing bearing for the direct support of an outer belt section on the mating roll and consists of a thermally insulating material.
    Type: Application
    Filed: August 13, 2002
    Publication date: February 20, 2003
    Applicant: Eduard Kusters Maschinenfabrik GmbH & Co. KG
    Inventor: Brendel Dr. Bernhard
  • Patent number: 6521093
    Abstract: Press arrangement for processing a fibrous material web that includes at least first and second presses arranged to form at least first and second press nips. The at least first and second presses are consecutively arranged without intervening presses, and structured and arranged without a common center roll and without a common felt. The first press is a double felted press including a suction press roll and a mating roll, and is positioned upstream from the second press relative to a web run direction. The suction press roll is structured and arranged as a pick-up roll and is located on top of said mating roll.
    Type: Grant
    Filed: October 1, 2001
    Date of Patent: February 18, 2003
    Assignee: Voith Paper Patent GmbH
    Inventor: Andreas Meschenmoser
  • Patent number: 6517683
    Abstract: The invention relates to a press in a machine for the production or treatment of a continuously running web of cellulosic fibrous material, for instance a paper, tissue or board machine. The press includes a press device and a counter element arranged opposite the press device, which is arranged to form a press zone in the form of an extended press nip in cooperation with the press device having a certain width in the machine direction for pressing the fibrous web as it runs through the press nip.
    Type: Grant
    Filed: May 29, 2001
    Date of Patent: February 11, 2003
    Assignee: Metso Paper Karlstad AB
    Inventor: Erik Brox
  • Publication number: 20030024677
    Abstract: In a shoe press belt, in which the nip zone is narrower than the shoe width, the shearing force which normally acts on the belt at the outer boundary of the nip zone is made either weak or non-existent by forming the outer portions of the belt of less hardness than the inner, or central, portion of the belt, so that the less hard portions can be positioned directly opposite the outer boundaries of the nip zone. Alternatively, the outer portions of the belt can be made thinner than the central portion of the belt and the thinner portions positioned directly opposite to the nip zone boundaries. The shearing force applied to the belt at the nip ends of the roll is reduced or eliminated, cracking resulting from the shear force is reduced or avoided, and a belt having improved durability results.
    Type: Application
    Filed: July 29, 2002
    Publication date: February 6, 2003
    Inventor: Kazumasa Watanabe
  • Publication number: 20030024676
    Abstract: The invention relates to a press roll (1) comprising a flexible rotating endless-loop blanket (3) of a liquid-impervious material, two disc-shaped roll heads (4, 5), and a clamp element (14) filled with a pressurized medium for clamping the lateral rims (21) of the blanket (3) to the respective ones (4, 5) of the roll heads. The invention is implemented by adapting between the pressurized-medium-filled clamp element (14) and the blanket (3) an annular ring (18) serving to press the rim of the blanket (3) during the pressurization of said clamp element against the inner rim surface (15) of a sector plate (7) and, respectively, serving to contract the clamp element (14) when the pressure of the clamp element (14) is removed or lowered.
    Type: Application
    Filed: July 1, 2002
    Publication date: February 6, 2003
    Inventor: Erkki Aho
  • Patent number: 6514385
    Abstract: Press section of a machine and process for producing webs. The press section includes a shoe press including a shoe press unit and a counter roll. The shoe press unit includes at least two press shoes and an elastic liquid-impermeable press belt guided over the at least two press shoes, and the at least two press shoes have different lengths measured in a web travel direction and each of the two press shoes is arranged for movement (i.e. alternatively positionable) between an idle position and a press position facing the counter roll.
    Type: Grant
    Filed: December 22, 2000
    Date of Patent: February 4, 2003
    Assignee: Voith Paper Patent GmbH
    Inventors: Thomas Thoröe Scherb, Harald Schmidt-Hebbel
  • Publication number: 20030019600
    Abstract: Machine for producing a fibrous material web and process for guiding the web through the machine. The machine includes a wire section, a drying section, arranged downstream of the wire section with regard to a web travel direction, having at least one free web draw, a first and second shoe press separated in the web travel direction, and an upper felt and a lower transfer belt arranged to guide the fibrous material web through the second shoe press. The lower transfer belt is structured and arranged to transfer the fibrous material web to the drying section, and the material web is guided in a closed draw from the wire section to a first free web draw, with regard to the web travel direction, in the drying section. At least one high-performance drying device is positioned before the first free web draw.
    Type: Application
    Filed: June 3, 2002
    Publication date: January 30, 2003
    Applicant: Voith Paper Patent GmbH
    Inventor: Ulrich Begemann
  • Publication number: 20030015306
    Abstract: An extended-nip press is disclosed comprising a press roll (2) and a backing roll (1), wherein the press roll (2) comprises a rotating endless-loop blanket (3) of a flexible, liquid-impervious material, a rigid and advantageously stationary roll support beam (4) that extends axially through the interior of the endless blanket (3), at least one shoe element (8) resting on the roll support beam (4) and having a concave top face, and loading means (6) for loading the shoe element (8) by way of pressing the concave top face thereof against the flexible endless-loop blanket (3) so as to make the blanket (3) form a press nip zone (N) in cooperation with the backing roll (1), said loading means (6) comprising a linear array of loading units (6′) aligned along the axial direction of the press roll (2), each one of the loading units comprising a functionally cooperating piston-cylinder unit.
    Type: Application
    Filed: July 2, 2002
    Publication date: January 23, 2003
    Inventors: Erkki Aho, Aki Laari
  • Publication number: 20030010464
    Abstract: A shoe press comprises a shoe support device mounted downstream of the press shoe of the shoe press to carry forces acting on the press shoe and having a first support element that has a support surface facing the press shoe and is fixedly connected to a stationary stand of the shoe press, and a second support element in the form of at least one rolling body arranged in a space between the support surface of the first support element and an opposite support surface of the press shoe to be in contact with the two support surfaces during operation. The rolling body is arranged to roll along the two support surfaces when the press shoe is moved relative to a second support element in the shoe press, while rotating about an axis of rotation that moves in relation to and in the same direction as the press shoe.
    Type: Application
    Filed: September 12, 2002
    Publication date: January 16, 2003
    Applicant: Metso Paper Karlstad AB
    Inventor: Erik Brox
  • Patent number: 6505549
    Abstract: In a roll nip (5) formed between a shoe press roll (1) having a concave, plane or slightly convex press shoe (11), a flexible jacket (15) and a hot counter roll (3), the jacket (15) may be damaged by the heat from the counter roll (3) upon a web break. To avoid this, the roll nip (5) is opened by removing one of the press shoe (11) and the hot counter roll (3) from the other, so that the jacket (15) resumes a generally cylindrical shape having an arched portion located across the shoe (11). Then, a force is applied inside the roll jacket (15), directed away from the roll nip (5), to tension the roll jacket (15) over the leading edge and the trailing edge of the press shoe (11), so as to reduce the height of arch of the arched portion over the shoe (11) sufficiently to ensure removal of the jacket (15) from contact with the hot counter roll (3). Preferably, the force against the inside of the jacket is applied by means of a tensioning shoe (61).
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: January 14, 2003
    Assignee: Metso Paper Karlstad AB
    Inventor: Erik Brox
  • Publication number: 20030000672
    Abstract: The press device for a paper web, such as a calendar, contains a flexible moving element (1a) forming an endless structure, said element forming the shell (1) of a roll, the press device including further a counter roll. Inside the moving element (1a) there is a shoe element (3) that is arranged to support the shell (1a) against the counter roll to form a nip (N). The width and/or the surface contour of the supporting surface of the shoe element (3) guiding the shell of the roll in the nip contact varies in the machine direction and the shoe element is positionable in the machine direction to adjust the nip width and/or length.
    Type: Application
    Filed: July 12, 2002
    Publication date: January 2, 2003
    Inventor: Mika Viljanmaa
  • Publication number: 20020179270
    Abstract: A shoe press includes: a first member; a second member; a substantially cylindrical belt; and a processing unit. The first member has a convex pressing surface. The second member includes a shoe with a concave pressing surface substantially complimentary to the convex pressing surface. The second member further includes a pair of substantially circular head plates rotatably mounted on axially opposed ends thereof. The belt is fixed to, extends between, and is rotatable with the head plates such that a portion of the belt passes between the convex pressing surface and the concave pressing surface. The belt includes embedded therein a communications cable having a plurality of sensors configured to generate signals responsive to an operating parameter of the shoe press. The processing unit is in communication with the communications cable and processes signals generated by the sensors.
    Type: Application
    Filed: June 1, 2001
    Publication date: December 5, 2002
    Inventors: Eric J. Gustafson, William S. Butterfield, Bertram Staudenmaier
  • Patent number: 6488814
    Abstract: Pressing arrangement of a machine and process for producing a web. The pressing arrangement includes a shoe press unit and an opposing roll arranged to form at least one press nip. The shoe press unit includes at least one press shoe arranged opposite the opposing roll and a flexible, liquid-impermeable press belt arranged to be guided over the press shoe. The opposing roll includes a smooth surface. At least one press felt is arranged to be guided through the press nip along with the press belt and the web. The at least one felt is deflected away from the web, which is picked up by the smooth surface of the opposing roll, such that the at least one felt is guided out of the press nip at an angle greater than or equal to about 10° to a tangent to the opposing roll at an end of the press nip.
    Type: Grant
    Filed: December 22, 2000
    Date of Patent: December 3, 2002
    Assignee: Voith Paper Patent GmbH
    Inventors: Thomas Thoröe Scherb, Harald Schmidt-Hebbel
  • Patent number: 6488816
    Abstract: A drying section for drying a web in a papermaking machine has a pre-drying section and a final drying section, wherein the pre-drying section includes a hot press formed by a first press member and a rotatable counter roll in engagement with each other so as to form a nip therebetween through which the web passes. The hot press further includes a heating device disposed in heat-transfer relation to the counter roll and operable to heat a surface region of the counter roll which then passes through the nip so as to heat the web therein, and an imprinting fabric arranged in an endless loop, the imprinting fabric defining an imprinting surface for imprinting the web and being arranged to pass through the nip of the hot press with the web against the imprinting surface such that the web is imprinted. The imprinting fabric continues to support the imprinted web downstream of the hot press at least up to the final drying section.
    Type: Grant
    Filed: June 16, 2000
    Date of Patent: December 3, 2002
    Assignee: Metso Paper Karlstad AB
    Inventor: Ingvar Klerelid
  • Publication number: 20020153116
    Abstract: A press roll belt is arranged to be used in connection with a roll (10) forming a press nip. The belt (12) of the press roll (10) is provided with a groove pattern formed of intersecting grooves (11A, 11B). A press concept has at least one press nip formed between two rolls (30, 32) to remove water from a web. At least one press nip (NA) of the press concept is formed such that the cover (22) or the belt (12) of at least one roll (30A, 32A) forming the press nip is provided with groove patterning formed of intersecting grooves (11A, 11B; 21A, 21B).
    Type: Application
    Filed: April 5, 2002
    Publication date: October 24, 2002
    Inventors: Petter Honkalampi, Heikki Kaasalainen, Nils Soderholm
  • Patent number: 6461478
    Abstract: Disclosed is method and a pressing device (10) of a paper and/or paperboard machine intended for the treatment of a fibrous web (12) which is formed on a band screen and passes around an appropriate open roller (16) having recessed intended to receive the water squeezed out the fibrous web. The open roller forms with a counterface a first nip (18) which is extended, in the direction of movement of the L band, by a pressing shoe unit (20). A papermaker's felt (22, 24) passes both on the open roller (16) and said pressing shoe unit (20).
    Type: Grant
    Filed: September 3, 1999
    Date of Patent: October 8, 2002
    Assignee: Voith Sulzer Papiertechnik Patent GmbH
    Inventor: Andreas Meschenmoser
  • Patent number: 6458246
    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: April 3, 2001
    Date of Patent: October 1, 2002
    Assignees: Metso Paper, Inc., Mitsubishi Heavy Industries, Ltd.
    Inventors: Roger A. Kanitz, Thomas D. Rogers
  • Patent number: 6458248
    Abstract: The present invention is an apparatus for maximizing water removal from an absorbent web in a press nip. The present invention uses a pressing unit with a pressure profile that maximizes water removal in the press section or on the Yankee dryer of a paper machine. The pressure profile of the pressing unit according to the present invention has a very steep pressure drop at and/or following the exit of a pressure distribution curve in order to maximize water removal by minimizing rewet of the web. The improved pressure profile according to the present invention results in increased water removal and/or improved line speed.
    Type: Grant
    Filed: March 17, 2000
    Date of Patent: October 1, 2002
    Assignee: Fort James Corporation
    Inventors: Steven L. Edwards, Robert J. Marinack, Jeffrey Charles McDowell, Gary L. Worry
  • Publication number: 20020124981
    Abstract: A method and machine for the manufacturing a fibrous pulp web including forming a first draining zone and a second draining zone which are successively arranging in a web run direction, applying pressure in the first drainage zone which increases in the web run direction from an initial pressure to a final pressure to drain one side of the web, and applying pressure in the second drainage zone which increases in the web run direction from an initial pressure to a final pressure to drain the other side of the web. The initial pressure in the second draining zone is less than the final pressure in the first draining zone.
    Type: Application
    Filed: May 1, 2001
    Publication date: September 12, 2002
    Applicant: VOITH SULZER PAPIERMASCHINEN GmbH
    Inventors: Joachim Henssler, Hans Loser, Karl Steiner, Albrecht Bauder
  • Publication number: 20020117284
    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: Application
    Filed: September 24, 2001
    Publication date: August 29, 2002
    Applicant: Metso Paper Karlstad AB
    Inventor: Tord Gustavsson
  • Publication number: 20020104630
    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: Application
    Filed: December 21, 2001
    Publication date: August 8, 2002
    Inventors: John H. Dwiggins, Frank D. Harper, Galyn A. Schulz, Brian J. Schuh, Michael S. Heath, T. Philips Oriaran
  • Patent number: 6428655
    Abstract: The invention concerns an integrated paper machine, which comprises, in the running direction of the web, a multi-layer headbox (100), a gap former (200), in which there is at least one pre-press (303, 304), a press section (300), in whcih there is at least one extended-nip press (308, 309), a pre-dryer section (400), in which the web (W) is dried by means of a high-capacity dryer unit, a dryer section (500), in which there is at least one dryer group (R1, R2, R3) which makes use of single-wire draw, as well as a surface treatment device (P) for the web. Further, the paper machine is provided with a closed web draw at least to the end of the dryer section (500).
    Type: Grant
    Filed: December 8, 2000
    Date of Patent: August 6, 2002
    Assignee: Metso Paper, Inc.
    Inventor: Reima Kerttula
  • Patent number: 6430459
    Abstract: A roll sensing system for measuring the pressure distribution and nip width in a nip roll press. The sensing system comprises a strip having sensors thereon, the strip being placed in a nip press, for sensing the pressure at several locations therealong. At one end of the strip lies electronics associated with the sensors. The electronics communicate with an optional multiplexer and a bidirectional transmitter for signal transmission to an external signal conditioner and an external computer. The computer determines pressure values and nip width values at various locations along the strip, and communicates with a display which provides a visual, graphical and/or numerical data to the operator. Optionally, a control system can be in communication with the transmitter or the computer to initiate crown corrections in response to pressure or nip width readings.
    Type: Grant
    Filed: March 19, 2001
    Date of Patent: August 6, 2002
    Assignee: SW Paper Inc.
    Inventor: Robert H. Moore
  • Publication number: 20020100571
    Abstract: A process for continuous reeling of a pulp sheet, particularly a paper sheet, where the sheet runs over a reel drum and is later wound on a winding unit. The pressing force in the nip between the horizontal reel and the reel drum being measured without any losses during the entire winding process. This process is implemented by a device having a reel drum and a horizontal reel supported on load-sensing devices.
    Type: Application
    Filed: January 16, 2002
    Publication date: August 1, 2002
    Inventors: Wilhelm Mausser, Gerald Schadler
  • Patent number: 6425980
    Abstract: Press device and process for treating a material web. The press device includes a first shoe press and a second shoe press. The first and the second shoe press are successively arranged in a web run direction. A transfer suction roll is positioned between the first shoe press and the second shoe press and is adapted to at least partially suction the material web and to guide the material web in a closed draw through at least one of the first and the second shoe presses. The process may includes at least partially suctioning the material web with the transfer suction roll, and guiding the material web in a closed draw through at least one of the first and the second shoe presses.
    Type: Grant
    Filed: April 14, 1999
    Date of Patent: July 30, 2002
    Assignee: Voith Sulzer Papiertechnik Patent GmbH
    Inventors: Peter Mirsberger, Hans Dahl, Andreas Meschenmoser
  • Publication number: 20020096304
    Abstract: A wet paper web or other wet porous web exiting a web former is supported on a vented press roll and sequentially subjected to a relatively high pressure mechanical nip pressing force and a relatively low pressure water displacement-pressing force. The combination of the two diverse pressing forces applied in sequence to the web is very effective in efficient and economical de-watering of the web and at the same time provides a de-watered web having high bulk, high solids content and high mechanical strength. The low pressure fluid displacement pressing force is applied immediately contiguous to the high pressure mechanical nip pressing force and may be applied upstream or downstream or both upstream and downstream of the mechanical nip pressing force.
    Type: Application
    Filed: January 22, 2001
    Publication date: July 25, 2002
    Applicant: Stora Enso North America Corporation
    Inventor: Dean F. Benjamin