EP0377641B1 - Verfahren und vorrichtung zum entfernen von wasser aus faserstoffbahnen - Google Patents

Verfahren und vorrichtung zum entfernen von wasser aus faserstoffbahnen 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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English (en)
French (fr)
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EP0377641A1 (de
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/de
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Publication of EP0377641B1 publication Critical patent/EP0377641B1/de
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)

Claims (18)

  1. Vorrichtung zum Entfernen von Fluid aus einer Faserbahn (W; WA; WB; WC; WD; WE), wobei die Vorrichtung ein Preßteil (12; 12A; 12B, 32; 12C; 12D; 12E) aufweist,
    eine Tucheinrichtung (14; 14A; 14B; 14C; 14D; 14E), die mit dem Preßteil (12; 12A; 12B, 32; 12C; 12D; 12E) zusammenwirkt, so daß zwischen ihnen eine langgestreckte Preßpartie (16; 16A; 16B; 16C; 16D; 16E) gebildet ist und die Bahn zwischen dem Preßteil (12; 12A; 12B, 32; 12C; 12D; 12E) und der Tucheinrichtung (14; 14A; 14B; 14C; 14D; 14E) während des Durchgangs durch die Preßpartie (16; 16A; 16B; 16C; 16D; 16E) gepreßt wird, und
    eine Heizeinrichtung (22; 22A; 22B; 22C; 22D; 22E), die an dem Preßteil (12; 12A; 12B, 32; 12C; 12D; 12E) angeordnet ist,
    dadurch gekennzeichnet, daß ein Preßschuh (18; 18A; 18B; 18C; 18D; 18E) die Tucheinrichtung (14; 14A; 14B; 14C; 14D; 14E) an das Preßteil (12; 12A; 12B, 32; 12C; 12D; 12E) anpreßt, so daß, wenn die Bahn (W; WA; WB; WC; WD; WE) durch die Preßpartie (16; 16A; 16B; 16C; 16D; 16E) hindurchgeht, Fluid aus der Bahn (W; WA; WB; WC; WD; WE) entfernt wird,
    wobei die Heizeinrichtung (22; 22A; 22B; 22C; 22D; 22E) stromaufwärts der Preßpartie (16; 16A; 16B; 16C; 16D; 16E) angeordnet ist, um das Preßteil (12; 12A; 12B, 32; 12C; 12D; 12E) zu erwärmen, und so ausgebildet ist, daß, wenn die Bahn (W; WA; WB; WC; WD; WE) durch den Preßabschnitt (16; 16A; 16B; 16C; 16D; 16E) hindurchgeht, die Bahn (W; WA; WB; WC; WD; WE) für eine ausgedehnte Zeitspanne erhöhtem Druck und erhöhter Temperatur ausgesetzt ist, so daß Wasserdampf, der innerhalb der Preßpartie (16; 16A; 16B; 16C; 16D; 16E) während des Durchgangs durch die Preßpartie (16; 16A; 16B; 16C; 16D; 16E) erzeugt wird, das Fluid in der flüssigen Phase aus der Bahn (W; WA; WB; WC; WD; WE) hinausdrückt, und
    wobei das Preßteil (12; 12A; 12B, 32; 12C; 12D; 12E) eine Preßoberfläche (24; 24A; 24B; 24C; 24D; 24E) aufweist, die porös ist, um eine Schichtablösung der Bahn (W; WA; WB; WC; WD; WE) zu verhindern.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Preßoberfläche (24; 24A; 24C; 24D; 24E) zylindrisch ist.
  3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß das Preßteil (12; 12C; 12D; 12E) weiter aufweist:
    eine erste koaxiale Schicht (26; 26C; 26D; 26E),
    eine zweite koaxiale Schicht (28; 28C; 28D; 28E), welche sich um die erste Schicht (26; 26C; 26D; 26E) erstreckt, wobei die zweite Schicht (28; 28C; 28D; 28E) die zylindrische Preßoberfläche (24; 24A; 24C; 24D; 24E) aufweist.
  4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die zweite Schicht (28; 28C; 28D; 28E) gesintert ist.
  5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die gesinterte zweite Schicht (28; 28C; 28D; 28E) eine Porengröße von wenigstens 2 Mikrometern hat.
  6. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die zweite Schicht (28; 28C; 28D; 28E) eine Dicke von wenigstens 0,0127 Zentimetern (0.005 Zoll) hat.
  7. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die zweite Schicht (28; 28C; 28D; 28E) ein Spritzüberzug auf der ersten Schicht (26; 26C; 26D; 26E) ist.
  8. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß die zweite Schicht (28; 28C; 28D; 28E) als Spritzüberzug auf die äußere Oberfläche der ersten Schicht (26; 26C; 26D; 26E), die eine Anpreßwalze mit ausgedehnter Anpreßzone ist, ist.
  9. Vorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß die zweite Schicht (28; 28C; 28D; 28E) auf die erste Schicht (26; 26C; 26D; 26E) durch eine Spritzüberzugstechnik aufgebracht ist, bei der die Porositäts-, Hohlraum- und Wärmeübertragungsspezifikation der resultierenden zweiten Schicht der Porositäts-, Hohlraum- und Wärmeübertragungsspezifikation einer Platte äquivalent ist, welche eine Porengröße von wenigstens 2-50 Mikrometern und eine Dicke von 0,0127-0,0254 Zentimetern (0.005-0.010 Zoll) hat.
  10. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Preßteil (12B, 32) eine Preßwalze (12B) und einen Fasermetallfilz (32) aufweist, der zwischen der Preßwalze (12B) und der Bahn (WB) angeordnet ist, so daß im Betrieb der Vorrichtung der Metallfilz (32) mit der Bahn (WB) durch die Preßpartie (16B) hindurchgeht.
  11. Vorrichtung nach Anspruch 10, dadurch gekennzeichnet, daß die Heizeinrichtung (22B) den Metallfilz (32) unmittelbar vor dem Hindurchgang durch die Preßpartie (16B) erwärmt.
  12. Vorrichtung nach Anspruch 11, dadurch gekennzeichnet, daß die Porositäts-, Hohlraumvolumen- und Wärmeübertragungsspezifikation des Metallfilzes (32) der Spezifikation einer gesinterten Platte äquivalent ist, welche eine Porengröße von 2-50 Mikrometern und eine Dicke von 0,0127-0,0254 Zentimetern (0.005-0.010 Zoll) hat.
  13. Vorrichtung nach Anspruch 11, dadurch gekennzeichnet, daß sie weiter aufweist:
    eine Reinigungseinrichtung (34) zum Reinigen des Metallfilzes (32), wobei die Reinigungseinrichtung (34) eine Einrichtung (36) aufweist zum Hindurchleiten eines Reinigungsmediums durch den Metallfilz (32) zu einer Oberfläche (24B) des Metallfilzes (32), die mit der Bahn (WB) in Kontakt ist, so daß Verunreinigungen, die durch den Metallfilz (32) während des Betriebes der Vorrichtung aufgenommen worden sind, aus dem Metallfilz (32) ausgestoßen werden.
  14. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß die erste Schicht (26C) belüftet ist, so daß Fluid, das in die Preßoberfläche (24C) eintritt, durch die zweite Schicht (28C) hindurch in die erste Schicht (26C) gelangt.
  15. Vorrichtung nach Anspruch 14, dadurch gekennzeichnet, daß die erste Schicht (26C) genutet ist.
  16. Vorrichtung nach Anspruch 14, dadurch gekennzeichnet, daß die erste Schicht (26C) mit Sackbohrungen versehen ist.
  17. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Preßteil (12E) weiter eine erste, massive innere Schicht (26E) und eine zweite, äußere Schicht (28E), welche sich um die erste Schicht (26E) erstreckt, aufweist, wobei die zweite Schicht (28E) eine Porengröße zwischen 5-50 Mikrometern hat, und eine dritte Schicht (44), die als Zwischenschicht zwischen der ersten und zweiten Schicht (26E, 28E) angeordnet ist, wobei die dritte Schicht (44) eine Porengröße innerhalb des Bereiches von 50-100 Mikrometern hat, so daß die dritte Schicht (44) das Belüften der zweiten Schicht (28E) und der Bahn (WE) unterstützt.
  18. Verfahren zum Entfernen von Fluid aus einer Faserbahn (WB), wobei das Verfahren die Schritte beinhaltet:
    Hindurchleiten der Faserbahn (WB) durch eine langgestreckte Preßpartie (16B), die zwischen einer Preßwalze (12B) und einem Tuch (14B) gebildet ist, so daß die Bahn (WB) und das Tuch (14B) sich gemeinsam durch die langgestreckte Preßpartie (16B) bewegen,
    Pressen der Bahn (WB) zwischen der Preßwalze (12B) und dem Tuch (14B) während des Durchgangs durch die langgestreckte Preßpartie (16B),
    gekennzeichnet durch Vorsehen eines langgestreckten Anpreßschuhs (18B) zum Andrücken des Tuches (14B) an die Preßwalze (12B), wobei das Tuch (14B) zwischen der Bahn (WB) und dem langgestreckten Anpreßschuh (18B) in der Preßpartie (16B) angeordnet ist,
    Erhitzen eines Fasermetallfilzes (32), der sich durch die langgestreckte Preßpartie (16B) erstreckt, wobei der Metallfilz (32) unmittelbar vor dem Hindurchgang des Metallfilzes (32) durch die Preßpartie (16B) erhitzt wird, so daß die Wärme, die aus dem Metallfilz (32) auf die Bahn (WB) übertragen wird, ausreicht, um einen Teil des in der Bahn (WB) enthaltenen Fluids zu verdampfen, so daß das Fluid in der flüssigen Phase innerhalb der Bahn (WB) durch den Dampf aus der Bahn hinausgedrückt wird, während eine Schichtablösung der Bahn (WB) durch eine poröse Preßoberfläche (24B) verhindert wird, die durch den Fasermetallfilz (32) gebildet ist.
EP88908065A 1987-08-27 1988-08-23 Verfahren und vorrichtung zum entfernen von wasser aus faserstoffbahnen Expired - Lifetime EP0377641B1 (de)

Applications Claiming Priority (2)

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

Publications (2)

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

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EP88908065A Expired - Lifetime EP0377641B1 (de) 1987-08-27 1988-08-23 Verfahren und vorrichtung zum entfernen von wasser aus faserstoffbahnen

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EP (1) EP0377641B1 (de)
JP (1) JP2556991B2 (de)
KR (1) KR930007862B1 (de)
AU (1) AU625673B2 (de)
BR (1) BR8807672A (de)
CA (1) CA1314747C (de)
DE (1) DE3877584T2 (de)
FI (1) FI102092B1 (de)
MX (1) MX170204B (de)
NO (1) NO175268C (de)
WO (1) WO1989002005A1 (de)
ZA (1) ZA886354B (de)

Families Citing this family (3)

* 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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Publication number Priority date Publication date Assignee Title
DE575453C (de) * 1931-12-12 1933-04-28 Siempelkamp Gmbh & Co Pressvorrichtung
US3296710A (en) * 1965-07-15 1967-01-10 Rice Barton Corp Absorbent dryer
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

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

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