EP0377641B1 - Appareil et procede d'extraction de fluide a partir d'une bande fibreuse - Google Patents

Appareil et procede d'extraction de fluide a partir d'une bande fibreuse Download PDF

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Publication number
EP0377641B1
EP0377641B1 EP88908065A EP88908065A EP0377641B1 EP 0377641 B1 EP0377641 B1 EP 0377641B1 EP 88908065 A EP88908065 A EP 88908065A EP 88908065 A EP88908065 A EP 88908065A EP 0377641 B1 EP0377641 B1 EP 0377641B1
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EP
European Patent Office
Prior art keywords
web
layer
set forth
pressing
press member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP88908065A
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German (de)
English (en)
Other versions
EP0377641A1 (fr
Inventor
Jeffrey H. Pulkowski
Elizabeth A. Macklem
L. H. Busker
Dennis C. Cronin
David V. Lange
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Beloit Corp
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Beloit Corp
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Filing date
Publication date
Priority claimed from US07/089,887 external-priority patent/US4874469A/en
Application filed by Beloit Corp filed Critical Beloit Corp
Publication of EP0377641A1 publication Critical patent/EP0377641A1/fr
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Publication of EP0377641B1 publication Critical patent/EP0377641B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0281—Wet presses in combination with a dryer roll
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/08—Pressure rolls

Definitions

  • This invention relates to an apparatus and method for removing fluid from a fibrous web. More particularly, this invention relates to an apparatus and method in which a formed web is subjected for an extended period to increased pressure and temperature such that fluid within the web is removed.
  • DE-C-575 453 there is described an apparatus according to the preamble of claim 1. More specifically, DE-C-575 453 teaches the provision of an apparatus for removing fluid from a fibrous web, the apparatus including a press member, a blanket means cooperating with the press member for defining therebetween an elongate pressing section such that the web is pressed between the press member and the blanket means during passage through the pressing section, and heating means disposed adjacent to the press member.
  • a method for removing fluid from a fibrous web according to the preamble of claim 18 is also known from DE-C-575 453.
  • EP-A-0 258 169 published on March 2, 1988 falls under Article 54(3) EPC and thus is not relevant to the question of inventive step.
  • a so-called "high temperature pressing apparatus and method” is disclosed in which the paper web is subjected to a press drying operating for removing most of the water from the fibrous web.
  • the high temperature pressing technique involves the application of high temperatures and pressure to the paper web for an extended period of time.
  • the web to be dried extends through a press which includes an elongate shoe and a cooperating backing roll.
  • a blanket extends, together with the web, through a pressing section defined between the shoe and the backing roll (or pressing member).
  • the pressing member is inductively, or otherwise, heated such that during passage of the web through the pressing section, fluid within the web is vaporized to force fluid remaining in the liquid phase away from the web.
  • the apparatus of the invention is characterized by the features claimed in the characterizing portion of claim 1 and the method of the invention is characterized by the features set forth in the characterizing portion of claim 18.
  • a pressing shoe urges the blanket means towards the press member such that when the web passes through the pressing section, fluid is removed from the web.
  • the heating means are disposed upstream relative to the pressing section for heating the press member and structured such that when the web passes through the pressing section, the web is subjected for an extended period to increased pressure and temperature so that water vapour generated within the pressing section during passage through the pressing section forces the fluid in the liquid phase away from the web.
  • an apparatus for removing fluid from a fibrous web in which the press member defines a pressing surface which is porous.
  • the present invention provides an apparatus for removing fluid from a fibrous web in which the press member includes a first and a second coaxial layer with the second coaxial layer extending around the first layer, the second layer defining a cylindrical pressing surface.
  • Another feature of the present invention is the provision of an apparatus for removing fluid from a fibrous web in which the second layer is sintered and has a pore size of at least 2 microns.
  • Another feature of the present invention is the provision of an apparatus for removing fluid from a fibrous web in which the second layer has a thickness of at least .0127 centimeters (.005 inches).
  • Another feature of the present invention is the provision of an apparatus for removing fluid from a fibrous web in which the sintered layer is spray-coated onto the first layer which is a backing roll of an extended nip press.
  • Another embodiment of the present invention provides an apparatus for removing fluid from a fibrous web in which the apparatus includes a fiber metal felt disposed between a press roll and the web such that in operation of the apparatus, the metal felt passes with the web through the press section and in which the metal felt is heated immediately prior to the passage of the felt through the pressing section.
  • Another feature of the present invention is the provision of an apparatus for removing fluid from a fibrous web in which a cleaning means is provided for grassing a cleaning medium through the metal felt towards a surface of the metal felt contacting the web so that contaminants picked up by the metal felt during operation of the apparatus are ejected from the metal felt.
  • Another feature of the present invention is the provision of an apparatus for removing fluid from a fibrous web in which the first layer of the press member is vented.
  • the pressing surface is cylindrical and the press member includes a first coaxial layer and a second coaxial layer which extends around the first layer with the second layer defining the cylindrical pressing surface.
  • the second layer is sintered and has a pore size of at least 2 microns and a thickness of at least .0127 cm (.005 inches).
  • the second layer may be spray-coated onto the external surface of the first layer which may be an extended nip press backing roll.
  • the apparatus includes a fiber metal felt which is disposed between the press member and the web such that in operation of the apparatus, the metal felt passes with the web through the press section, the metal felt being heated immediately prior to passage through the press section.
  • the apparatus also includes cleaning means for cleaning the metal felt.
  • the cleaning means includes means for passing a cleaning medium through the metal felt towards a surface of the metal felt contacting the web so that contaminants picked up by the metal felt during operation of the apparatus are ejected from the metal felt.
  • the first layer is vented such that fluid entering the porous layer passes through the second layer into the first layer.
  • the hot roll includes a first, or inner, solid surface, a second, or outer, layer having a porosity of 20 microns and an intermediate third layer of 100 microns porosity disposed between the first and second layers such that the third layer assists in the ventilation of the roll.
  • the present invention provides a porous second layer for inhibiting delamination
  • the provision of the fiber metal felt may be sufficient to inhibit delamination of the formed web without the need of a porous outer layer on the press member.
  • the second, or outer, layer may not necessarily be a separate layer but may be etched onto the first layer or otherwise provided by mechanically working the surface of the first layer.
  • FIG. 1 is a side-elevational view of an apparatus generally designated 10 for removing fluid from a fibrous web W.
  • the apparatus 10 includes a press member 12 and a blanket means generally designated 14 which cooperates with the press member 12 for defining therebetween an elongate pressing section generally designed 16 such that the web W is pressed between the press member 12 and the blanket means 14 during passage through the pressing section 16.
  • An elongate means 18 such as an extended nip press shoe, urges the blanket means 14 towards the press member 12 as indicated by the arrow 20 such that when the web W passes through the pressing section 16 fluid is removed from the web W.
  • Heating means generally designated 22 is disposed adjacent to the press member 12 for transferring heat to the web W such that when the web W passes through the press section 16, the web W is subjected for an extended period to increased pressure and temperature so that water vapor generated within the pressing section 16 during passage through the pressing section 16 forces the fluid in the liquid phase away from the web W.
  • the press member 12 defines a pressing surface 24 which is porous for inhibiting delamination of the web W. More specifically, as shown in figure 1, the pressing surface is cylindrical.
  • FIG 2 is a similar view to that shown in figure 1 but shows a second embodiment of the present invention in which an apparatus 10A for removing fluid from a fibrous web WA includes a press member 12A in which the press member 12A has a first coaxial layer 26 and a second coaxial layer 28 extending around the first layer 26.
  • the second layer 28 defines a cylindrical pressing surface 24A.
  • the second layer 28, as shown in figure 2 may be a sintered layer having a pore size of at least 2 microns.
  • the second layer 28 has a thickness of at least .0127 cm (.005 inches).
  • Such second layer 28 may be applied to the first layer 26 by a spray-coating technique.
  • the second layer 28 in the aforementioned spray-coating technique is spray-coated onto the external surface 30 of the first layer 26, the first layer 26 being an extended nip press backing roll.
  • the second layer 28 is applied to the first layer 26 by the aforementioned spray-coating technique in which the specification and performance of the resultant second layer 28 is equivalent to the specification and performance of a plate having a pore size of at least 2 microns and a thickness of at least .0127 cm (.005 inches).
  • FIG 3 is a side-elevational view of a third embodiment of the present invention and shows an apparatus 10B for removing fluid from a fibrous web WB.
  • the apparatus 10B includes a fiber metal felt 32 which is disposed between a press member 12B and the web WB such that in operation of the apparatus 10B, the metal felt 32 passes with the web WB through the press section 16B.
  • the metal felt 32 is heated as indicated by the heater 22B immediately prior to passage of the metal felt 32 through the press section 16B.
  • the porosity, void volume and heat transfer specification of the metal felt 32 is equivalent to the specification and performance of a sintered plate having a pore size of at least 2 microns and a thickness of at least .0127 cm (.005 inches).
  • Figure 3 also shows cleaning means generally designated 34 disposed downstream relative to the press member 12B for cleaning the metal felt 32.
  • the cleaning means 34 includes means 36 such as a pump for passing a cleaning medium through the metal felt 32 towards a surface 24B of the metal felt 32 contacting the web WB so that contaminants picked up by the metal felt 32 during operation of the apparatus 10B are ejected from the metal felt 32.
  • Figure 4 is a side-elevational view of a fourth embodiment of the present invention and shows an apparatus 10C in which the first layer 26C of the press member 12C is vented such that fluid entering the pressing surface 24C passes through the second layer 28C into the first layer 26C.
  • the first layer 26C is grooved as shown particularly in figure 5 which is a section on the line 5-5 of figure 4.
  • Figure 5 shows a plurality of axially-spaced grooves 38, 39 and 40 defined by the external surface 30C of the first layer 26C.
  • Figure 6 is a similar view to that shown in figures 4 and 5 but shows a fifth embodiment of the present invention in which the first layer 26D is blind-drilled as indicated by the holes 41, 42 and 43.
  • the heated roll, or press member, 12E includes a first layer 26E which is solid and an outer, or second, porous layer 28E having a pore size within the range 5-50 microns and preferably of 20 microns.
  • An intermediate third layer 44 is disposed between layers 26E and 28E, the third layer 44 having a pore size within the range 50-100 microns and preferably of 100 microns such that ventilation of the second layer and the web WE is assisted.
  • the web W is conducted through the press section 16 and heat is applied, for example by induction heating, through th heater 22 such that the press member 12 is heated. Pressure is applied as indicated by the arrow 20 such that the blanket 14 is pressed towards the pressing member 12 thereby exerting pressure on the web W as the web W passes through the pressing section 16.
  • the combination of high pressure and high temperature for an extended period results in fluid from within the fibrous web W being vaporized such that this vapor forces fluid in the liquid phase away from the web W.
  • the present invention overcomes this problem by the provision of a porous layer 24 on the outer surface of the press member 12 such that the vapor pressure is relieved and the amount of heat transferred through the press member 12 to the web W is reduced thereby inhibiting delamination of the web.
  • figure 2 shows a simple means of applying a porous layer 28 to the external surface of a conventional backing roll of an extended nip press.
  • a fiber metal felt 32 is used to convey thermal energy from the heater 22B towards the pressing section 16B such that the web WB is subjected to heat and pressure during passage through the pressing section 16B.
  • the advantage of the embodiment shown in figure 3 is that the pressing surface which effectively is the surface 24B of the metal felt 32 may be cleaned by means of the cleaning means 34.
  • the metal felt can be replaced more easily than a porous surface roll.
  • Another advantage derived from use of a metal felt is that the press member or roll will run significantly cooler thereby alleviation problems associated with heating a controlled crown type roll.

Landscapes

  • Paper (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Cleaning Implements For Floors, Carpets, Furniture, Walls, And The Like (AREA)

Abstract

Appareil et procédé d'extraction de fluide à partir d'une bande fibreuse (W), ledit appareil (10) comportant un élément de presse (12) ainsi qu'une couverture (14) coopérant avec l'élément de presse (12), entre lesquels est définie une partie de pressage allongée (16), de sorte que la bande (W) est pressée entre l'élément de presse (12) et la coverture (14) pendant le passage à travers la partie de pressage (16). Un patin allongé (18) pousse la couverture (14) vers l'élément de presse (12), de sorte que lorsque la bande (W) passe à travers la partie de pressage (16), du fluide est extrait de la bande (W). Un système de chauffage (22) est disposé adjacent à l'élément de presse (12), afin de transférer de la chaleur à la bande (W), de sorte que lorsque celle-ci (W) passe à travers la partie de pressage (16), ladite bande (W) est soumise pendant une période prolongée à une pression et à une température augmentées, de sorte que la vapeur d'eau produite dans la partie de pressage (16) pendant le passage à travers celle-ci (16) contraint le fluide en phase liquide à sortir de la bande. L'élément de presse (12) définit une surface de pressage (24) poreuse, ce qui empêche le décollement inter-laminaire de la bande.

Claims (18)

  1. Appareil pour éliminer un fluide d'une bande fibreuse (W; WA; WB; WC; WD; WE), ledit appareil englobant un élément de presse (12; 12A; 12B, 32; 12C; 12D; 12E),
       un moyen de blanchet (14; 14A; 14B; 14C; 14D; 14E) coopérant avec ledit élément de presse (12; 12A; 12B, 32; 12C; 12D; 12E) pour définir entre eux une section de pressage allongée (16; 16A; 16B; 16C; 16D; 16E) de telle sorte que la bande soit pressée entre l'élément de presse (12; 12A; 12B, 32; 12C; 12D; 12E) et le moyen de blanchet (14; 14A; 14B; 14C; 14D; 14E) au cours de son passage à travers la section de pressage (16; 16A; 16B; 16C; 16D; 16E), et
       un moyen de chauffage (22; 22A; 22B; 22C; 22D; 22E) disposé en position adjacente audit élément de presse (12; 12A; 12B, 32; 12C; 12D; 12E),
       caractérisé en ce qu'un sabot de pressage (18; 18A; 18B; 18C; 18D; 18E) presse ledit moyen de blanchet (14; 14A; 14B; 14C; 14D; 14E) en direction dudit élément de presse (12; 12A; 12B, 32; 12C; 12D; 12E) de telle sorte que, lorsque la bande (W; WA; WB; WC; WD; WE) passe à travers ladite section de pressage (16; 16A; 16B; 16C; 16D; 16E), du fluide s'élimine de la bande (W; WA; WB; WC; WD; WE),
       lesdits moyens de chauffage (22; 22A; 22B; 22C; 22D; 22E) sont disposés en amont par rapport à ladite section de pressage (16; 16A; 16B; 16C; 16D; 16E) pour chauffer ledit élément de presse (12; 12A; 12B, 32; 12C; 12D; 12E) et ils sont structurés de telle sorte que, lorsque la bande (W; WA; WB; WC; WD; WE) passe par ladite section de pressage (16; 16A; 16B; 16C; 16D; 16E), la bande (W; WA; WB; WC; WD; WE) est soumise pendant un laps de temps prolongé à une augmentation de pression et de température, si bien que la vapeur d'eau générée au sein de ladite section de pressage (16; 16A; 16B; 16C; 16D; 16E) au cours de son passage à travers ladite section de pressage (16; 16A; 16B; 16C; 16D; 16E), force le fluide en phase liquide à l'écart de la bande (W; WA; WB; WC; WD; WE), et
       l'élément de presse (12; 12A; 12B, 32; 12C; 12D; 12E) définit une surface de pressage (24; 24A; 24B; 24C; 24D; 24E) qui est poreuse pour inhiber le décollement de la bande (W; WA; WB; WC; WD; WE).
  2. Appareil selon la revendication 1, caractérisé en ce que ladite surface de pressage (24; 24A; 24C; 24D; 24E) est cylindrique.
  3. Appareil selon la revendication 2, caractérisé en ce que ledit élément de presse (12; 12C; 12D; 12E) englobe, en outre :
       une première couche coaxiale (26; 26C; 26D; 26E),
       une seconde couche coaxiale (28; 28C; 28D; 28E) s'étendant autour de ladite première couche (26; 26C; 26D; 26E), ladite seconde couche (28; 28C; 28D; 28E) définissant ladite surface cylindrique de pressage (24; 24A; 24C; 24D; 24E).
  4. Appareil selon la revendication 3, caractérisé en ce que ladite seconde couche (28; 28C; 28D; 28E) est frittée.
  5. Appareil selon la revendication 4, caractérisé en ce que ladite seconde couche frittée (28; 28C; 28D; 28E) possède une dimension de pore d'au moins 2 microns.
  6. Appareil selon la revendication 4, caractérisé en ce que ladite seconde couche (28; 28C; 28D; 28E) a une épaisseur d'au moins 0,0127 cm (0,005 pouce).
  7. Appareil selon la revendication 4, caractérisé en ce que ladite seconde couche (28; 28C; 28D; 28E) est enduite par projection sur ladite première couche (26; 26C; 26D; 26E).
  8. Appareil selon la revendication 4, caractérisé en ce que ladite seconde couche (28; 28C; 28D; 28E) est enduite par projection sur la surface externe de ladite première couche (26; 26C; 26D; 26E) qui concerne un cylindre de support de presse à écartement linéaire étendu.
  9. Appareil selon la revendication 7, caractérisé en ce que ladite seconde couche (28; 28C; 28D; 28E) est appliquée sur ladite première couche (26; 26C; 26D; 26E) par une technique de revêtement par projection dans laquelle la spécification quant à la porosité, quant au volume de vide et quant au transfert de chaleur de ladite seconde couche résultante, est équivalente à la spécification quant à la porosité, quant au volume de vide et quant au transfert de chaleur d'une plaque ayant une dimension de pore d'au moins 2-50 microns et une épaisseur de 0,0127-0,0254 cm (0,005-0,010 pouce).
  10. Appareil selon la revendication 1, caractérisé en ce que ledit élément de presse (12B, 32) englobe un cylindre de presse (12B) et un feutre métallique en fibres (32) disposé entre le cylindre de presse (12B) et la bande (WB) de telle sorte que, lors de la mise en service dudit appareil, ledit feutre métallique (32) passe avec ladite bande (WB) à travers ladite section de pressage (16B).
  11. Appareil selon la revendication 10, caractérisé en ce que ledit moyen de chauffage (22B) chauffe ledit feutre métallique (32) immédiatement avant son passage à travers la section de pressage (16B).
  12. Appareil selon la revendication 11, caractérisé en ce que la spécification quant à la porosité, quant au volume de vide et quant au transfert de chaleur dudit feutre métallique (32), est équivalente à la spécification d'une plaque frittée ayant une dimension de pore de 2-50 microns et une épaisseur de 0,0127-0,0254 cm (0,005-0,010 pouce).
  13. Appareil selon la revendication 11, caractérisé en ce qu'il englobe, en outre :
       un moyen de nettoyage (34) pour nettoyer ledit feutre métallique (32), ledit moyen de nettoyage (34) englobant un moyen (36) pour faire passer un milieu de nettoyage à travers ledit feutre métallique (32) en direction de la surface (24B) dudit feutre métallique (32), qui vient se mettre en contact avec la bande (WB), si bien que des contaminants récoltés par ledit feutre métallique (32) lors de la mise en service de l'appareil sont éjectés dudit feutre métallique (32).
  14. Appareil selon la revendication 3, caractérisé en ce que ladite première couche (26C) est munie d'évents, si bien que le fluide pénétrant dans ladite surface de pressage (24C) passe à travers ladite seconde couche (28C) et entre dans ladite première couche (26C).
  15. Appareil selon la revendication 14, caractérisé en ce que ladite première couche (26C) est rainurée.
  16. Appareil selon la revendication 14, caractérisé en ce que ladite première couche (26C) est munie d'alésages borgnes.
  17. Appareil selon la revendication 1, caractérisé par le fait que ledit élément de presse (12E) englobe, en outre, une première couche interne pleine (26E), une deuxième couche externe (28E) s'étendant autour de ladite première couche (26E), ladite deuxième couche (28E) ayant une dimension de pore entre 5 et 50 microns, et une troisième couche intermédiaire (44) disposée entre lesdites première et deuxième couches (26E, 28E), respectivement, ladite troisième couche (44) ayant une dimension de pore dans le domaine de 50 à 100 microns de telle sorte que ladite troisième couche (44) favorise la ventilation de ladite deuxième couche (28E) et de la bande (WE).
  18. Procédé pour éliminer un fluide d'une bande fibreuse (WB), le procédé comprenant les étapes consistant à:
       guider la bande fibreuse (WB) à travers une section de pressage allongée (16B) définie entre un cylindre de presse (12B) et un blanchet (14B) de telle sorte que la bande (WB) et le blanchet (14B) se déplacent conjointement à travers la section de pressage allongée (16B);
       presser la bande (WB) entre le cylindre de presse (12B) et le blanchet (14B) au cours de leur passage à travers la section de pressage allongée (16B),
       caractérisé par le fait de procurer un sabot de pressage (18B) à écartement linéaire étendu pour presser le blanchet (14B) en direction du cylindre de presse (12B), le blanchet (14B) étant disposé entre la bande (WB) et le sabot de pressage (18B) à écartement linéaire étendu dans la section de pressage (16B);
       chauffer un feutre métallique en fibres (32) s'étendant à travers la section de pressage allongée (16B), le feutre métallique (32) étant chauffé immédiatement avant le passage du feutre métallique (32) à travers la section de pressage (16B) de telle sorte que la chaleur transférée à la bande (WB) par le feutre métallique (32) est suffisante pour évaporer une portion du fluide contenu dans la bande (WB), si bien que le fluide en phase liquide au sein de la bande (WB) est forcé par la vapeur à l'écart de la bande, tout en inhibant le décollement de la bande (WB) à l'intervention d'une surface poreuse de pressage (24B) définie par le feutre métallique en fibres (32).
EP88908065A 1987-08-27 1988-08-23 Appareil et procede d'extraction de fluide a partir d'une bande fibreuse Expired - Lifetime EP0377641B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US89887 1987-08-27
US07/089,887 US4874469A (en) 1986-08-12 1987-08-27 Heated extended nip press with porous roll layers

Publications (2)

Publication Number Publication Date
EP0377641A1 EP0377641A1 (fr) 1990-07-18
EP0377641B1 true EP0377641B1 (fr) 1993-01-13

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EP88908065A Expired - Lifetime EP0377641B1 (fr) 1987-08-27 1988-08-23 Appareil et procede d'extraction de fluide a partir d'une bande fibreuse

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EP (1) EP0377641B1 (fr)
JP (1) JP2556991B2 (fr)
KR (1) KR930007862B1 (fr)
AU (1) AU625673B2 (fr)
BR (1) BR8807672A (fr)
CA (1) CA1314747C (fr)
DE (1) DE3877584T2 (fr)
FI (1) FI102092B (fr)
MX (1) MX170204B (fr)
NO (1) NO175268C (fr)
WO (1) WO1989002005A1 (fr)
ZA (1) ZA886354B (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4738752A (en) * 1986-08-12 1988-04-19 Beloit Corporation Heated extended nip press apparatus
US4973384A (en) * 1989-06-23 1990-11-27 Beloit Corporation Heated extended nip press apparatus
US5152874A (en) * 1989-09-06 1992-10-06 Beloit Corporation Apparatus and method for removing fluid from a fibrous web

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DE575453C (de) * 1931-12-12 1933-04-28 Siempelkamp Gmbh & Co Pressvorrichtung
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DE2328738A1 (de) * 1973-06-06 1975-01-09 Metallurg Gmbh Beschichtete walze oder zylinder fuer druck- und papiermaschinen
US4366025A (en) * 1981-06-04 1982-12-28 Beloit Corporation Suction press roll
DK331483A (da) * 1982-07-22 1984-01-23 Wiggins Teape Group Ltd Papirfremstillingsmaskine
US4571798A (en) * 1983-09-19 1986-02-25 Beloit Corporation Urethane covered paper machine roll
FI70273C (fi) * 1985-01-09 1986-09-15 Valmet Oy Syntetisk pressvals och foerfaranden foer framstaellning av dena
US4738752A (en) * 1986-08-12 1988-04-19 Beloit Corporation Heated extended nip press apparatus
JPS6361830A (ja) * 1986-09-02 1988-03-18 Kanji Murakami 環境制御装置

Also Published As

Publication number Publication date
WO1989002005A1 (fr) 1989-03-09
CA1314747C (fr) 1993-03-23
DE3877584D1 (de) 1993-02-25
ZA886354B (en) 1990-01-31
FI102092B1 (fi) 1998-10-15
MX170204B (es) 1993-08-11
DE3877584T2 (de) 1993-05-13
NO175268B (no) 1994-06-13
EP0377641A1 (fr) 1990-07-18
KR930007862B1 (ko) 1993-08-20
AU625673B2 (en) 1992-07-16
NO175268C (no) 1994-09-21
NO900890L (no) 1990-02-26
FI102092B (fi) 1998-10-15
AU2314288A (en) 1989-03-31
KR890701838A (ko) 1989-12-21
BR8807672A (pt) 1990-08-07
FI900959A0 (fi) 1990-02-26
NO900890D0 (no) 1990-02-26
JP2556991B2 (ja) 1996-11-27
JPH02501669A (ja) 1990-06-07

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