Plural Sequential Presses Patents (Class 162/360.2)
  • Patent number: 8580083
    Abstract: A method to dewater a fibrous web includes directing the fibrous web through a first press zone defined between a revolving permeable belt and a revolving permeable support belt and having a first press zone length. The fibrous web is arranged lying between the revolving permeable belt and the revolving permeable support belt. A fluid is caused to flow through the permeable belt, the fibrous web and the support belt at least over a section of the first press zone length. The fibrous web is dewatered in a second press zone following the first press zone and defined between the revolving permeable belt and the revolving permeable support belt, the second press zone having a second press zone length. The fibrous web is led through the second press zone between the permeable belt and the support belt, the permeable belt and the support belt each having a different compressibility.
    Type: Grant
    Filed: January 24, 2013
    Date of Patent: November 12, 2013
    Assignee: Voith Patent GmbH
    Inventors: Joao V. Boechat, Thomas Scherb, Luiz C. Silva, Rogerio Berardi, Daniela Reis
  • Patent number: 8545677
    Abstract: Calender (1) for calendering a paper or board web (2), having at least one nip (3), which is formed between a heatable roll (4) and a mating element (5), a device (6) for producing a predetermined pressure in the nip (3), and a web treatment device (7) arranged upstream of the nip (3) and having two contact surfaces (9, 10) forming a treatment nip (8), one of which is a circulating contact surface (9) which is formed by a belt (14) circulating on guide rolls (11, 12, 13), the other contact surface (10) is formed by the circulating surface of the heatable roll (4), and the treatment nip (8) extends along an angle (15) of the wrap of the heatable roll (4), wherein, in order to increase the thermal efficiency of the transfer of heat, the circulating belt (14) uses a resilient surface to press the paper or board web (2) onto the heatable roll (4), and the guide rolls (11, 12, 13) control sectional forces of the circulating belt (14) in the treatment nip (8).
    Type: Grant
    Filed: June 25, 2010
    Date of Patent: October 1, 2013
    Assignee: Andritz Kusters GmbH
    Inventors: Peter Svenka, Bernhard Brendel, Eduard Davydenko
  • Patent number: 8382956
    Abstract: A device for drainage of a pulp web, particularly a tissue web, having a first pressing zone having a first pressing zone length through which the pulp web is fed horizontally between a circulating, permeable band and a circulating, permeable support band. The first pressing zone is designed such that a fluid can flow through the band, the pulp web and the support band at least on one part of the first pressing zone length. In addition, the device has a subsequent second pressing zone having a second pressing zone length. The pulp web is guided through the second pressing zone between two bands having differing compressibility.
    Type: Grant
    Filed: June 17, 2011
    Date of Patent: February 26, 2013
    Assignee: Voith Patent GmbH
    Inventors: Joao V. Boechat, Thomas Scherb, Luiz C. Silva, Rogerio Berardi, Daniela Reis
  • Publication number: 20110303379
    Abstract: A device for drainage of a pulp web, particularly a tissue web, having a first pressing zone having a first pressing zone length through which the pulp web is fed horizontally between a circulating, permeable band and a circulating, permeable support band. The first pressing zone is designed such that a fluid can flow through the band, the pulp web and the support band at least on one part of the first pressing zone length. In addition, the device has a subsequent second pressing zone having a second pressing zone length. The pulp web is guided through the second pressing zone between two bands having differing compressibility.
    Type: Application
    Filed: June 17, 2011
    Publication date: December 15, 2011
    Inventors: Joao V. Boechat, Thomas Scherb, Luiz C. Silva, Rogerio Berardi, Daniela Reis
  • Publication number: 20110180223
    Abstract: A tissue papermaking machine is described, comprising a wet section (2) and a press section (3) comprising a single press (11) with first and second press elements (12, 13) forming a press nip (N1), and with a press felt (17) running through the press nip in contact with the formed fibre web (1?), whereby the second press element is arranged inside the loop of the press M felt, and a smooth belt (14) runs through the press nip in contact with the formed fibre web, whereby the first press element is arranged inside the loop of the belt, and a transfer roll (16) arranged inside the loop of the belt forming a transfer nip (N2) with a drying surface (20), whereby the smooth belt carries the fibre web between the press nip and the transfer nip. Furthermore, the machine has a dry section (4) for final drying of the fibre web (1?).
    Type: Application
    Filed: September 16, 2009
    Publication date: July 28, 2011
    Inventors: Ingvar Klerelid, Ola Thomasson
  • Publication number: 20100276100
    Abstract: In a narrow used paper processing space of a used paper recycling apparatus of furniture size, this is a dewatering device for executing smoothly and efficiently a dewatering process as a principal component of a paper making process for manufacturing used paper pulp. Being disposed in a linkage location between a mesh belt and a smooth surface belt, and configured to roll and squeeze the mesh belt and the smooth surface belt from the upper and lower sides in a compressed state, the apparatus includes a preliminary dewatering roll unit for squeezing and dewatering preliminarily the wet paper on the mesh belt, and a final dewatering roll unit for squeezing and dewatering the wet paper on the mesh belt preliminarily dewatered in the preliminary dewatering roll unit to obtain dry paper of specified water content.
    Type: Application
    Filed: April 13, 2010
    Publication date: November 4, 2010
    Inventors: Shigeru Tamai, Yuji Koyama
  • Patent number: 7601244
    Abstract: The present invention relates to a smoothing press for a paper machine and a press for a paper machine with a smoothing press as well as a paper production method. At a final stage of a press section (2) of a paper machine, wet web (1) with one face thereof retained by elastic members (13, 14) is pressed by the nip section of a pair of press rolls (12a, 12b) having a surface formed from a rigid material.
    Type: Grant
    Filed: May 12, 2004
    Date of Patent: October 13, 2009
    Assignee: Oji Paper Co., Ltd.
    Inventors: Hidemasa Iijima, Takasi Bando, Hirosi Iwata, Daisuke Goto, Kotaro Shinoda
  • Patent number: 7517434
    Abstract: A paper transporting felt includes a base layer, a first batt layer formed on a wet paper side surface of the base layer, a second batt layer formed on a press side surface of the base layer, a polymer elastic material impregnated in the base layer, the first batt layer and the second batt layer, and a wet paper contacting layer which is formed on a wet paper side surface of the first batt layer so as to come into direct contact with a wet paper, and includes a flexible resin material. The compressibility of the wet paper contacting layer is larger than that of a layer formed of the base layer, the first batt layer and the second batt layer.
    Type: Grant
    Filed: February 6, 2006
    Date of Patent: April 14, 2009
    Assignee: Ichikawa Co., Ltd.
    Inventors: Takashi Ouchi, Kenji Inoue
  • Patent number: 7481906
    Abstract: A paper transporting felt includes a base layer, a first batt layer formed on a wet paper side surface of the base layer, a second batt layer formed on a roll side surface or a shoe side surface of the base layer, and a wet paper contacting fibrous layer formed on a wet paper side surface of the first batt layer so as to come into direct contact with a wet paper. The wet paper contacting fibrous layer is made of modified cross-section fibers.
    Type: Grant
    Filed: November 16, 2005
    Date of Patent: January 27, 2009
    Assignee: Ichikawa Co., Ltd.
    Inventors: Takashi Ouchi, Kenji Inoue
  • Patent number: 7481907
    Abstract: A paper transporting felt includes a base layer, a first batt layer formed on a wet paper side surface of the base layer, a second batt layer formed on a roll side surface or a shoe side surface of the base layer, and a wet paper contacting layer formed on a wet paper side surface of the first batt layer so as to come into direct contact with a wet paper. The wet paper contacting layer is formed of a flexible resin material.
    Type: Grant
    Filed: December 20, 2005
    Date of Patent: January 27, 2009
    Assignee: Ichikawa Co., Ltd.
    Inventors: Takashi Ouchi, Kenji Inoue
  • Publication number: 20090014143
    Abstract: In order to provide a smoothing press apparatus suitable to be applied to a closed draw type paper machine for allowing the surface of the wet paper to be smoothed and papermaking to be performed in a high speed, [Means for Achieving the Object] the smoothing press apparatus 100 is mounted on a last stage of the press part 11 of the closed draw type paper machine, and includes a smoothing press 17 having a pair of press rolls 23 and 25, a smoothing belt 27 interposed between the smoothing press 17 together with the wet paper W to smooth the surface of the wet paper, and a wet paper conveyer felt 21 for conveying the wet paper W and passing over it to the smoothing belt 27.
    Type: Application
    Filed: May 31, 2006
    Publication date: January 15, 2009
    Applicant: ICHIKAWA CO., LTD.
    Inventors: Yasuhiko Kobayashi, Hiroyuki Takamura, Akira Onikubo
  • Publication number: 20080277086
    Abstract: A frame for a twin-wire press is disclosed including pairs of side members including upper and lower side members arranged on opposite sides of the press, between which upper and lower rolls are attached, a plurality of transverse beams arranged between the pairs of side members which themselves are sections of flat sheet metal and spacers for mutually releasably connecting the side members with the sheet metal being formed so that it permits a degree of curing in the vertical plane to facilitate access to the space between the upper and lower rolls. A method for exchanging wire in a twin-wire press of this type is also disclosed.
    Type: Application
    Filed: June 3, 2005
    Publication date: November 13, 2008
    Applicant: METSO PAPER, INC.
    Inventors: Leif Odmark, Peter Svedberg, Anders Lofstrand, Hans Lovgren
  • Publication number: 20080210397
    Abstract: A belt press for a paper machine, the belt press including a roll having an exterior surface and a permeable belt. The permeable belt has a first side and is guided over a portion of the exterior surface of the roll. The permeable belt has a tension of at least approximately 30 KN/m, the first side has an open area of at least approximately 25% and a contact area of at least approximately 10%.
    Type: Application
    Filed: December 23, 2004
    Publication date: September 4, 2008
    Inventors: Thomas Thoroe Scherb, Hubert Walkenhaus, Jeffrey Herman, Luiz Carlos Silva
  • Publication number: 20080163998
    Abstract: A press fabric having a plurality of surface pressing plates on a sheet side of the fabric imparts an impression onto a sheet of paper web during a pressing process. The surface pressing plates are preferably resin pressing plates, and form at least one of a random pattern of dots, a predetermined pattern of dots, a grid pattern of dots, a regular grid pattern of lines, an irregular grid pattern of lines a plurality of squiggly lines, a plurality of wavy lines, a plurality of straight lines, words and pictures.
    Type: Application
    Filed: August 23, 2006
    Publication date: July 10, 2008
    Inventors: Robert Crook, John Jeffery, Lippi A. Fernandes, Anthony Morton, Justin Payne, David Ponton, Luiz Carlos Silva
  • Patent number: 7115188
    Abstract: Process and apparatus for monitoring dewatering in a wet end section of a web production machine. The process includes measuring water flowing into the wet end section, measuring water flowing out of the wet end section, measuring conductivity of the wet web entering the wet end section, measuring conductivity of the water flowing into wet end section, measuring conductivity of water flowing out of the wet end section, and determining a water balance from the measured quantities, which is indicative of dewatering in the wet end. The apparatus is arranged to perform the process.
    Type: Grant
    Filed: January 18, 2002
    Date of Patent: October 3, 2006
    Assignee: Voith Paper Patent GmbH
    Inventor: Andrew Lilburn
  • Patent number: 7051882
    Abstract: A twin-wire belt press is disclosed for dewatering a fiber suspension and forming a continuous web of the fiber suspension. The twin wire belt includes a plurality of upper and lower rolls, a perforated roll and endless upper and lower wire belts. Dewatering tables are used to support the endless upper and lower wire belts and form a wedge-shaped pressure space between the endless upper and lower wire belts for initially pressing and dewatering the fiber suspension and forming a web therebetween. Roll members, including at least two press rolls which form press roll nips with the perforated roll and another roll, press and dewater the web between the endless upper and lower wire belts.
    Type: Grant
    Filed: July 26, 2001
    Date of Patent: May 30, 2006
    Assignee: Metso Paper, Inc.
    Inventors: Leif Ödmark, Göran Olsson, Mats Ullmar
  • Patent number: 6994771
    Abstract: A method for treating a web of paper or board with a wetting substance or calendering the web prior to the cylinder dryer section of a paper- or boardmaking machine while the solids content of the web is still very low, typically in the range of 10–60%, wherein the web can be conveyed when so desired fully supported from the wire section of the paper- or boardmaking machine up to the winder, while simultaneously utilizing the quality benefits obtained from a controlled reduction of the web moisture content and dewatering of the same. The web is conveyed supported by a transfer belt (9) through at least one web surface treatment apparatus such as a coater station (S1B) or a calender prior to passing the web to the first dryer cylinder group (1) of the paper- or boardmaking machine. One nip (11, 13) supported by a transfer belt (9) is suitable for dewatering simultaneously with the application of a treatment substance to the web.
    Type: Grant
    Filed: March 10, 2000
    Date of Patent: February 7, 2006
    Assignee: Metso Paper, Inc.
    Inventors: Hannu Korhonen, Rauno Rantanen
  • Patent number: 6989077
    Abstract: Wide nip calender arrangement and process for glazing a paper or cardboard web that includes a back pressure surface, a support shoe arrangement, and a circulating jacket loaded by the support shoe arrangement in a direction of the back pressure surface to form a wide nip. A moistening device is arranged before, relative to a web travel direction, an intake to the wide nip, and a calibration nip is arranged behind, relative to a web travel direction, a discharge from the wide nip. 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: Grant
    Filed: January 28, 2003
    Date of Patent: January 24, 2006
    Assignee: Voith Paper Patent GmbH
    Inventor: Rüdiger Kurtz
  • Patent number: 6926806
    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: Grant
    Filed: February 1, 2001
    Date of Patent: August 9, 2005
    Assignee: Metso Paper, Inc.
    Inventors: Petter Honkalampi, Petteri Halme, Juhani Pajula
  • Patent number: 6863776
    Abstract: Press section and process for dewatering a fibrous material web that includes a plurality of rolls arranged to form at least three nips and at least one endlessly circulating dewatering belt associated with each nip. Each at least one endlessly circulating dewatering belt is structured and arranged to guide the fibrous material web through its respective nip and to receive water squeezed out of the fibrous material web in the respective nip. The plurality of rolls include at least one press roll having a smooth surface arranged to contact a surface of the fibrous material web and an endlessly circulating, smooth transfer belt is structured and arranged to contact a surface of the fibrous material web opposite the surface contacting the smooth surface of the at least one press roll and to support the fibrous material web through at least one of the at least three nips.
    Type: Grant
    Filed: September 20, 2002
    Date of Patent: March 8, 2005
    Assignee: Voith Paper Patent GmbH
    Inventors: Ulrich Begemann, Ingolf Cedra, Thomas Augscheller, Georg Kleiser
  • Patent number: 6799382
    Abstract: A process for drying/heat-treating nonwoven webs in which the web is partially dried under tension in a first drying zone and further heat treated under low tension or in a substantially tensionless state a second drying zone. The process significantly reduces the occurrence of stretch-type defects in the nonwoven webs.
    Type: Grant
    Filed: August 25, 2003
    Date of Patent: October 5, 2004
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: John C. Cleary, Michael C. Davis, Todd A. McCoy, Edgar N. Rudisill
  • Publication number: 20040188049
    Abstract: An air press for use in a paper machine removes liquid from a fiber web. The air press includes a plurality of rolls, with each roll having a peripheral surface. The plurality of rolls include at least one pair of adjacent rolls defining a nip therebetween. Each roll in the at least one roll pair has longitudinally opposite replaceable ends. The replaceable ends define a portion of the peripheral surface with the nip therebetween.
    Type: Application
    Filed: March 26, 2003
    Publication date: September 30, 2004
    Inventor: David A. Beck
  • Patent number: 6749724
    Abstract: A method and arrangement in doctoring in a paper or board machine is disclosed in which the web travels through at least one press nip, in which the press nip is formed by at least a press roll and its backing roll and in which at least one roll is doctored using at least one doctor device. The press roll is doctored essentially over the width of the web.
    Type: Grant
    Filed: August 28, 2002
    Date of Patent: June 15, 2004
    Assignee: Metso Paper, Inc.
    Inventors: Ilkka Eskelinen, Timo Pirinen, Jukka Samppala
  • Patent number: 6730192
    Abstract: Printing paper or paperboard of 30-200 g/m2 grammage is made in a machine with a wet section, press section and drying section. The web passes through a roll press with a double-felted roll-press nip, then in a shoe press with an extended single or double-felted shoe-press nip, and pressed in a deflection-compensating roll press, having a double-felted roll-press nip and open press rolls. The web travels at at least 1,200 m/min.; is subjected in the roll-press nip to a linear load from 100 to 300 kN-m and a specific pressure from 5 to 15 MPa; and is subjected in the shoe-press nip to a linear load from 500 to 1,500 kN/m and a specific high pressure from 4 to 13 MPa, to obtain a dewatered web with a dry-solids content of at least 38 percent after the roll-press nip and at least 45 percent after the shoe-press nip.
    Type: Grant
    Filed: April 22, 2002
    Date of Patent: May 4, 2004
    Assignee: Metso Paper, Inc.
    Inventor: Jorma Laapotti
  • Publication number: 20040055723
    Abstract: The press section comprises at least two separate press nips (N1, N2) through which a web (W) to be pressed is passed as a closed draw. The first press nip of the press section is a pre-press nip (N1) formed between a roll (11) placed inside a forming wire loop (12) and a roll (21) placed outside the forming wire loop (12), which pre-press nip is an extended nip. The second press nip of the press section is a press nip proper (N2) provided with two water-receiving press felts (34, 42), through which nip the web (W) runs between said press felts (34, 42). An upper press fabric in the pre-press nip (N1) is formed of a water-receiving press fabric (24) lying against the outer surface of the water-receiving press fabric (24), in which connection the web (W) runs in the pre-press nip (N1) between the lower forming wire (12) and the upper water-permeable press fabric (26). The invention also relates to a method for removing water from a web in a press section provided with a pre-press nip.
    Type: Application
    Filed: October 14, 2003
    Publication date: March 25, 2004
    Inventors: Petter Honkalampi, Heikki Kaasalainen, Nils Soderholm
  • Publication number: 20040020619
    Abstract: There is described a method and apparatus for applying steam from a steam source to a moving web to thereby improve the smoothness and gloss of the web. A housing has at least one cooling chamber upstream and at least one steam chamber downstream. The cooling air in the cooling chamber is used to cool the web before steam is applied to the web from the steam chamber. This allows a sufficient volume of steam to be delivered to the web to thereby raise its moisture content to a desired level to thus achieve optimized calendering of the web.
    Type: Application
    Filed: July 30, 2002
    Publication date: February 5, 2004
    Applicant: ABB, Inc.
    Inventor: Robert G. Hamel
  • 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
  • Patent number: 6656325
    Abstract: A paper or board machine having a double-felted first press nip and a double-clothed second press nip. According to the invention the first press nip has a suction roll with suction zone, the downstream end of which is situated downstream of the press nip, the top felt being separated from the bottom felt at a point before the downstream end of the suction zone. The bottom felt of the first press nip carries the web to the second press which has a top felt which carries the web from the bottom felt of the first press nip to the second press nip, which is an extended press nip. A pickup suction roll is arranged in the top felt loop of the second press for transfer of the web from the bottom felt of the first press to the top felt of the second press. The latter bottom felt leaves the suction roll at the downstream end of the suction zone and is provided in its loop with suction boxes situated at a point before the transfer of the web to the top felt of the second press.
    Type: Grant
    Filed: November 15, 2000
    Date of Patent: December 2, 2003
    Assignee: Metso Paper, Inc.
    Inventor: Jorma Tapio Laapotti
  • 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
  • Publication number: 20030085014
    Abstract: A process for increasing the tactile properties of a base web without adversely affecting the strength of the web is disclosed. In general, the process includes the steps of placing a base web in between a first moving conveyor and a second moving conveyor. The conveyors are then wrapped around a shear inducing roll which creates shear forces that act upon the base web. The shear inducing roll typically has a relatively small diameter. In some applications, more than one shear inducing roll may be incorporated into the system. In other applications, the shear inducing roll can also be a nip roll for decreasing the caliper of the base web. The shear inducing roll may be stationary, as in the form of a stationary shoe with a convex edge, or may rotate. In one embodiment, the shear inducing roll can rotate on an air bearing.
    Type: Application
    Filed: November 5, 2001
    Publication date: May 8, 2003
    Applicant: Kimberly-Clark Worldwide, Inc.
    Inventors: Frank S. Hada, Keith D. Glass, Ronald F. Gropp, Patricia Riedl, Douglas C. Thomas
  • 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
  • Patent number: 6540880
    Abstract: An apparatus and process for imprinting a web. A yankee drum and pressure roll are juxtaposed to form a nip. An imprinting member, such as through air drying belt or other patterning belt is interposed in the nip. A felt is also interposed in the nip, contacting the backside of the imprinting member. The imprinting member carries a paper web. The paper web is imprinted in the nip and simultaneously transferred to the yankee drying drum. The nip may be formed with a vacuum roll juxtaposed with the felt. The vacuum roll may remove from the felt and hence the web.
    Type: Grant
    Filed: September 15, 2000
    Date of Patent: April 1, 2003
    Assignee: The Procter & Gamble Company
    Inventors: Paul D. Trokhan, Dean V. Phan, Robert S. Ampulski
  • Patent number: 6540873
    Abstract: A board machine and method for making a multilayer cardboard web, in which a first layer of the web having a printable surface is formed in a first forming unit and carried on an extended forming wire thereof through a couching unit where the first layer is couched with one or more additional layers, the multilayer web then being carried on the extended wire to a pick-up point. An upper press felt of a double-felted press picks up the web at the pick-up point such that the printable surface faces downward and contacts the lower press felt through the nip of the press. The lower felt is smoother than the upper felt, and the lower felt contacts the lower press roll for a minimum sector angle beyond an exit of the nip to ensure that the web follows the lower felt.
    Type: Grant
    Filed: February 26, 2002
    Date of Patent: April 1, 2003
    Assignee: Metso Paper Karlstad AB
    Inventor: Per Anders Artur Leandersson
  • Publication number: 20030056923
    Abstract: An air press for pressing a fiber web includes a plurality of rolls and a pair of end seal arrangements. Of the plurality of rolls, each pair of adjacent rolls forms a nip therebetween. Further, each roll has a pair of roll ends, the plurality of rolls together forming two sets of roll ends. Each end seal arrangement coacts with one set of roll ends, the plurality of rolls and the pair of end seal arrangements together defining an air press chamber having an air chamber pressure. Each end seal arrangement is composed of at least one roll seal, including a first roll seal, and an adjustable bias mechanism. Each roll seal forms a seal with at least one roll end, and one side of the first roll seal being exposed to the air chamber pressure. The adjustable bias mechanism is configured for controlling a position of each roll seal relative to a respective at least one roll end and for adjusting a seal force between the roll seal and the respective at least one roll end.
    Type: Application
    Filed: September 27, 2001
    Publication date: March 27, 2003
    Inventor: David A. Beck
  • Publication number: 20030056922
    Abstract: A roll for use in an air press assembly of a papermaking machine has a pair of ends associated therewith. The roll includes a pair of edge portions with each edge portion extending to one of the pair of ends. Each edge portion has an edge surface portion composed of a first material, the first material having a first hardness. The roll further includes a middle portion located between the pair of edge portions, the middle portion having a middle surface portion composed of a second material. The second material has a second hardness, the second material being harder than the first material. The first material is preferably a soft, seal material which promotes reduced air leakage from the air press assembly.
    Type: Application
    Filed: September 27, 2001
    Publication date: March 27, 2003
    Inventor: David A. Beck
  • Publication number: 20030056921
    Abstract: An air press for pressing a paper web is composed of a plurality of rolls including at least a first roll and a second roll. The first roll and the second roll are positioned adjacent one another and form a first nip therebetween. Further, the first roll and the second roll each have a roll end, the roll end of the first roll adjoining the roll end of the second roll. A bevel plate is attached to the roll end of the first roll, the bevel plate having at least a first angled plate face. A seal ring is positioned adjacent the roll end of the second roll, the seal ring being juxtaposed to the bevel plate. The seal ring has at least a first angled ring face, and the first angled ring face mates with the first angled plate face.
    Type: Application
    Filed: September 27, 2001
    Publication date: March 27, 2003
    Inventors: David A. Beck, Thomas Gorshe
  • Patent number: 6527916
    Abstract: Pressing section of paper machine including first and a second pressing stations, a common lower felt arranged to run through first and the second pressing stations, and an first upper felt and a second upper felt arranged to run through first and second pressing stations. Second pressing station includes shoe press roll located above a lower roll, and pressing plane of second pressing station is oriented essentially vertically or inclined at an angle &bgr;, which is a maximum of about 20° to vertical. The common lower felt is sufficiently dense to be essentially air impermeable even in its new state after moistening, and is sufficiently open to allow water through at pressures greater than about 5 bar. First and second upper felts are sufficiently open to allow air through in their moistened, uncompressed state, and pressing plane of first pressing station is oriented at an angle greater than angle &bgr;.
    Type: Grant
    Filed: April 9, 2001
    Date of Patent: March 4, 2003
    Assignee: Voith Paper Patent GmbH
    Inventor: Christian Schiel
  • 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: 6485612
    Abstract: A press assembly for use in a paper-making machine includes a roll, a first air press backing assembly and a second air press backing assembly. The first air press backing assembly and the second air press backing assembly each include an inner wall, an outer support structure and a plurality of inflatable hoses interposed between the inner wall and the outer support structure. The inner wall is positioned adjacent to and defines an air chamber with the roll.
    Type: Grant
    Filed: May 18, 2001
    Date of Patent: November 26, 2002
    Assignee: Voith Paper, Inc.
    Inventor: Edwin X. Graf
  • 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
  • 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: 20020117283
    Abstract: A method and apparatus for improving forming of a web of paper or paper board employing prepressing during web forming. Forming wires are brought together over at least one roll or alternatively two rolls. The web then passes, sandwiched between two wires through one or more pressure nips which may be one or more roll nips or an extended nips. The pressure nip may be formed as the web travels between the two fabrics, one of them being a forming wire, along a straight path or alternatively as the web travels partially around a roll. The web is then sandwiched between a wire and a fabric, which may be a felt or a belt, and passed through another press nip which may be one or more roll nips or an extended nip.
    Type: Application
    Filed: April 24, 2002
    Publication date: August 29, 2002
    Inventors: Nils Soderholm, Petter Honkalampi, Pekka Pakarinen, Heikki Kaasalainen
  • 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: 20020060050
    Abstract: Pressing section of paper machine including first and a second pressing stations, a common lower felt arranged to run through first and the second pressing stations, and an first upper felt and a second upper felt arranged to run through first and second pressing stations. Second pressing station includes shoe press roll located above a lower roll, and pressing plane of second pressing station is oriented essentially vertically or inclined at an angle &bgr;, which is a maximum of about 20° to vertical. The common lower felt is sufficiently dense to be essentially air impermeable even in its new state after moistening, and is sufficiently open to allow water through at pressures greater than about 5 bar. First and second upper felts are sufficiently open to allow air through in their moistened, uncompressed state, and pressing plane of first pressing station is oriented at an angle greater than angle &bgr;.
    Type: Application
    Filed: April 9, 2001
    Publication date: May 23, 2002
    Applicant: VOITH PAPER PATENT GmbH
    Inventor: Christian Schiel
  • Patent number: 6375800
    Abstract: Press section of a machine and process for producing a fiber web. The press section includes at least two press nips arranged in succession in a web travel direction. Each of the at least two press nips is formed by two press rolls. At least one continuously revolving press belt is guided around each press roll. At least one of before and after at least one of the at least two press nips, a guide region is formed in which two of the press belts are arranged to run jointly along a straight path, and the fiber web is adapted to run between the two press belts along the straight path. Guide elements are arranged at an end of each guide region. At an end of each guide region, the press belts are guided over the guide elements to run separately from one another, and a press belt angle between the press belts at the guide elements is greater than approximately 15°.
    Type: Grant
    Filed: April 13, 2000
    Date of Patent: April 23, 2002
    Assignee: Voith Sulzer Papiertechnik Patent GmbH
    Inventors: Karl Steiner, Gerhard Kotitschke, Thomas Augscheller
  • Patent number: 6334932
    Abstract: A press arrangement and process for treatment of a fibrous material web. The press arrangement includes a press shoe unit, a press suction roll, at least one first press nip elongated in a web travel direction, the first press nip being formed between the shoe press unit and the press suction roll, the press suction roll being arranged as a web pick-up roll, at least one second press nip elongated in the web travel direction and positioned downstream of the first press nip relative to the web travel direction, at least first and second felts being arranged to be guided through the at least one first press nip, the first felt being arranged to loop around the press suction roll to pick-up the web from a screen belt whereby the web is transferred from the screen belt to the first felt, wherein the web is guided to the first press nip by the first felt and the web is guided through the first press nip between the first and second felts.
    Type: Grant
    Filed: January 18, 2000
    Date of Patent: January 1, 2002
    Assignee: Voith Sulzer Papiertechnik Patent GmbH
    Inventor: Andreas Meschenmoser
  • Patent number: 6294052
    Abstract: Embodiments of a new press section for paper manufacturing are disclosed, each having a combination of rolls which form at least two press nips, with one roll of each combination being common to two press nips. Also, said embodiments further include two continuous-loop belts, one made of absorbent felt material, the other of plastic sheet, both disposed in a manner to enhance the evacuation of water from a web of wet paper fiber.
    Type: Grant
    Filed: June 18, 1997
    Date of Patent: September 25, 2001
    Inventor: Jose J. Garcia B.
  • Publication number: 20010009181
    Abstract: Press section and method of using the same for drainage of a fibrous material web that includes a shoe press roll, a cylindrical counter roll, at least one nip, a first nip of the at least one nip formed by the shoe press roll and the cylindrical counter roll, and at least one press felt. The at least one press felt is disposed on each side of the fibrous material web. The at least one press felt travels through a last nip of the at least one nip where the at least one press felt is separated from the fibrous material web and conveyed away after leaving the last nip. The drainage capacity and the reliable guidance of the fibrous material web are improved.
    Type: Application
    Filed: March 7, 2001
    Publication date: July 26, 2001
    Applicant: VOITH SULZER PAPIERTECHNIK PATENT GmbH
    Inventors: Karl Steiner, Albrecht Meinecke
  • Patent number: 6261416
    Abstract: Device and method for draining a web in a paper production machine. The device may include a press section having at least one press nip for draining and smoothing the web. The at least one press nip may be arranged to smooth one surface of the web more than its opposite surface and the device may also include a roughening device that roughens the one surface of the web. The method may include guiding the web through a press section of the paper production machine to drain and smooth the web in which the press section include at least one nip, smoothing one surface of the web more than its opposite surface in the at least one nip, and roughening the one surface.
    Type: Grant
    Filed: December 22, 1997
    Date of Patent: July 17, 2001
    Assignee: Voith Sulzer Papiermaschinen GmbH
    Inventors: Klaus Esslinger, Gerhard Kotitschke, Wolfgang Mayer, Andreas Meschenmoser, Günther Mohrhardt