EP0926296B1 - Machine for making a paper web, in particular a tissue web - Google Patents

Machine for making a paper web, in particular a tissue web Download PDF

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Publication number
EP0926296B1
EP0926296B1 EP98121245A EP98121245A EP0926296B1 EP 0926296 B1 EP0926296 B1 EP 0926296B1 EP 98121245 A EP98121245 A EP 98121245A EP 98121245 A EP98121245 A EP 98121245A EP 0926296 B1 EP0926296 B1 EP 0926296B1
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EP
European Patent Office
Prior art keywords
fibrous web
web
machine
press
belt
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
EP98121245A
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German (de)
French (fr)
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EP0926296A3 (en
EP0926296A2 (en
Inventor
Martin Dr. Tietz
Harald Schmidt-Hebbel
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Voith Patent GmbH
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Voith Paper Patent GmbH
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Application filed by Voith Paper Patent GmbH filed Critical Voith Paper Patent GmbH
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Publication of EP0926296A3 publication Critical patent/EP0926296A3/en
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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
    • D21F3/04—Arrangements thereof
    • D21F3/045—Arrangements thereof including at least one extended press nip
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/14—Making cellulose wadding, filter or blotting paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/14—Making cellulose wadding, filter or blotting paper
    • D21F11/145—Making cellulose wadding, filter or blotting paper including a through-drying process
    • 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

Definitions

  • the invention relates to a machine for producing a fibrous web, in particular a tissue paper web, with at least one shoe press unit and a press comprising a drying cylinder for formation an extended press nip, with the press nip next to the Fibrous web at least one water permeable and absorbent Band is guided, and the band together with the fibrous web is guided over at least one suctioned device, the fibrous web is outside.
  • Such a machine is for example in DE 42 16 264 C2 and also described in WO 97/16593.
  • the suctioned used Devices are used to remove the respective fibrous web from a sieve or a web, a functional interaction between this suction device and the shoe press unit is not intended.
  • shoe press units offer the advantage of a effective and volume-saving drainage, which is particularly the case with Tissue papers are essential.
  • the degree of Drainage from the pressing pulse as an integral of the pressing pressure over the Press time depends, the influence on the volume of the pressure maximum determined in the press zone. It is transported from the forming wire the machine through both press points with a water impermeable Tape. Although this tape prevents rewetting of the fibrous web, can, however, because of the lack of water absorption make no contribution to dewatering in the pressing points.
  • the upstream press nip the reason is that it absorbs water Felt led. That means that the drainage is essentially in this press nip takes place.
  • the object of the invention is therefore a machine for producing a To create fibrous web, in particular a tissue paper web, the is simple and as intensive and volume-saving as possible Drainage guaranteed.
  • the object was achieved in that the suction Device sufficient water from the belt and possibly the Fibrous web removed to create a water for the squeezed in the press nip to create sufficient water absorption capacity of the belt.
  • the result is a simply constructed machine that can be operated with just one Press nip can get by. At the same time it is possible to put the tape in Shaped part for receiving the fiber suspension from a headbox to use. This eliminates the need to hand over the Fiber web between different belts.
  • the Drying cylinders are used as tissue drying cylinders, the After drying, the fibrous web is preferably over a crepe scraper is scraped off the drying cylinder.
  • a suction roller is particularly suitable as the suction device in particular is directly upstream of the shoe press unit.
  • Suctioned rolls generally consist of a perforated roll shell inside either by direct connection to a vacuum source or by vacuuming the non-looped area of the roller, a negative pressure is produced.
  • These rollers are of a simpler design than those frequently used in Such machines used suction presses, because these must be more stable and may even have support elements.
  • the increased temperature of the drying cylinder also ensures that the Viscosity of the water in the press nip is reduced and thus drainage is improved.
  • FIG. 1 shows a schematic Partial view of a machine for producing a tissue paper web.
  • a so-called forming roller 11 together an endless Band 5 in the form of a felt and another, endless forming fabric 12 out, but only the belt 5 runs entirely around the forming roller 11.
  • the inlet gap between the felt and the forming fabric 12 is by means of a known headbox 8 introduced the fiber suspension.
  • Which the fibrous web 1 that is formed after the wrapping area Forming roller 11 together with the belt 5 up to an extended press nip 4 continued.
  • the belt 5 loops however, a suction device 6 in the form of a suction roller.
  • This suctioned roller removes a substantial part of the water from the Volume 5 and possibly even something from the outer fibrous web 1. This increases the water absorption capacity of the belt 5 considerably, so that it is in the following extended press nip 4, through which it together with the Fibrous web 1 runs, which can absorb squeezed water. This intensifies the drainage in such a way that you can get by with only one press nip 4.
  • the fibrous web 1 runs on the heated drying cylinder 3 along. Drying is still carried out in this loop area Drying hood 13, which blows hot, dry air onto the fibrous web 1 and vacuumed again, intensified.

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  • Paper (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Abstract

The machine has a blanket (5) passing through the press gap (4) next to the web (1) and supporting it, which is permeable to water. Before the blanket (5) reaches the press gap (4), it passes over at least one suction extraction unit (6). The blanket (5), together with the web (1), passes over the suction unit (6), with the web (1) on the outer side of the blanket (5). The shoe press (2) has at least a number of press zones across the direction (7) of web travel, each with an independent control. The suction extraction unit is a suction roller (6). The blanket (5) takes the fiber suspension from the paper formation stage from the stock inlet (8). The drying cylinder (3) acts as a tissue drying cylinder, where the dry web (1) is detached by a creping scraper (9).

Description

Die Erfindung betrifft eine Maschine zur Herstellung einer Faserstoffbahn, insbesondere einer Tissue-Papierbahn, mit wenigstens einer eine Schuhpresseinheit und einen Trockenzylinder umfassenden Presse zur Bildung eines verlängerten Pressspaltes, wobei durch den Pressspalt neben der Faserstoffbahn zumindest ein wasserdurchlässiges und -aufnehmendes Band geführt ist, und wobei das Band gemeinsam mit der Faserstoffbahn über wenigstens eine besaugte Vorrichtung geführt wird, wobei die Faserstoffbahn außen liegt.The invention relates to a machine for producing a fibrous web, in particular a tissue paper web, with at least one shoe press unit and a press comprising a drying cylinder for formation an extended press nip, with the press nip next to the Fibrous web at least one water permeable and absorbent Band is guided, and the band together with the fibrous web is guided over at least one suctioned device, the fibrous web is outside.

Eine derartige Maschine wird beispielsweise in der DE 42 16 264 C2 und auch in der WO 97/ 16593 beschrieben. Die dabei verwendeten besaugten Vorrichtungen dienen zur Abnahme der jeweiligen Faserstoffbahn von einem Sieb oder einer Bahn, ein funktionelles Zusammenwirken zwischen dieser Besaugungsvorrichtung und der Schuhpresseinheit ist dabei nicht vorgesehen.Such a machine is for example in DE 42 16 264 C2 and also described in WO 97/16593. The suctioned used Devices are used to remove the respective fibrous web from a sieve or a web, a functional interaction between this suction device and the shoe press unit is not intended.

Schuhpresseinheiten bieten in diesem Zusammenhang den Vorteil einer effektiven und volumenschonenden Entwässerung, was insbesondere bei Tissue-Papieren von wesentlicher Bedeutung ist. Während der Grad der Entwässerung vom Pressimpuls als Integral des Pressdruckes über der Presszeit abhängt, wird der Einfluss auf das Volumen vom Druckmaximum in der Presszone bestimmt. Dabei erfolgt der Transport vom Formersieb der Maschine durch beide Pressstellen mit einem wasserundurchlässigen Band. Dieses Band verhindert zwar eine Rückbefeuchtung der Faserstoffbahn, kann jedoch wegen der fehlenden Wasseraufnahmefähigkeit keinen Beitrag zur Entwässerung in den Pressstellen leisten. Aus diesem Grund wird durch den vorgelagerten Pressspalt ein wasseraufnehmender Filz geführt. Die bedeutet, dass die Entwässerung im wesentlichen in diesem Pressspalt stattfindet. Diese Maschinen sind daher nicht nur unbefriedigend hinsichtlich der Entwässerungsleiste sondern auch des Aufwandes.In this context, shoe press units offer the advantage of a effective and volume-saving drainage, which is particularly the case with Tissue papers are essential. During the degree of Drainage from the pressing pulse as an integral of the pressing pressure over the Press time depends, the influence on the volume of the pressure maximum determined in the press zone. It is transported from the forming wire the machine through both press points with a water impermeable Tape. Although this tape prevents rewetting of the fibrous web, can, however, because of the lack of water absorption make no contribution to dewatering in the pressing points. For this Because of the upstream press nip, the reason is that it absorbs water Felt led. That means that the drainage is essentially in this press nip takes place. These machines are therefore not only unsatisfactory with regard to the drainage bar but also the Expenditure.

Aufgabe der Erfindung ist es daher, eine Maschine zur Herstellung einer Faserstoffbahn, insbesondere einer Tissue-Papierbahn zu schaffen, die einfach aufgebaut ist und eine möglichst intensive und volumenschonende Entwässerung gewährleistet.The object of the invention is therefore a machine for producing a To create fibrous web, in particular a tissue paper web, the is simple and as intensive and volume-saving as possible Drainage guaranteed.

Erfindungsgemäß wurde die Aufgabe dadurch gelöst, dass die besaugte Vorrichtung ausreichend Wasser aus dem Band und gegebenenfalls der Faserstoffbahn entfernt, um ein für das im Pressspalt ausgepresste Wasser ausreichendes Wasseraufnahmevermögen des Bandes zu schaffen.According to the invention the object was achieved in that the suction Device sufficient water from the belt and possibly the Fibrous web removed to create a water for the squeezed in the press nip to create sufficient water absorption capacity of the belt.

Im Ergebnis entsteht eine einfach aufgebaute Maschine, die mit nur einem Pressspalt auskommen kann. Gleichzeitig ist es möglich, das Band im Formerteil zur Aufnahme der Faserstoffsuspension aus einem Stoffauflauf zu verwenden. Hierdurch entfällt die Notwendigkeit der Übergabe der Faserstoffbahn zwischen verschiedenen Bändern. Außerdem kann der Trockenzylinder als Tissue-Trockenzylinder eingesetzt werden, wobei die Faserstoffbahn nach erfolgter Trocknung vorzugsweise über einen Kreppschaber von dem Trockenzylinder abgeschabt wird.The result is a simply constructed machine that can be operated with just one Press nip can get by. At the same time it is possible to put the tape in Shaped part for receiving the fiber suspension from a headbox to use. This eliminates the need to hand over the Fiber web between different belts. In addition, the Drying cylinders are used as tissue drying cylinders, the After drying, the fibrous web is preferably over a crepe scraper is scraped off the drying cylinder.

Als besaugte Vorrichtung eignet sich vor allem eine besaugte Walze, die insbesondere der Schuhpresseinheit unmittelbar vorgeordnet ist. A suction roller is particularly suitable as the suction device in particular is directly upstream of the shoe press unit.

Es ist jedoch beispielsweise auch der Einsatz von einem oder mehreren Saugkästen möglich. However, it is also the use of one or more, for example Suction boxes possible.

Besaugte Walzen bestehen im allgemeinen aus einem perforierten Walzenmantel in dessen Inneren entweder durch direkten Anschluß an eine Vakuumquelle oder durch Besaugung des nicht-umschlungenen Bereiches der Walze ein Unterdruck erzeugt wird. Diese Walzen sind einfacher aufgebaut als die häufig in derartigen Maschinen zur Anwendung kommenden besaugten Preßwalzen, da diese stabiler konstruiert sein müssen und eventuell sogar Stützelemente besitzen.Suctioned rolls generally consist of a perforated roll shell inside either by direct connection to a vacuum source or by vacuuming the non-looped area of the roller, a negative pressure is produced. These rollers are of a simpler design than those frequently used in Such machines used suction presses, because these must be more stable and may even have support elements.

Als besonders vorteilhaft hat es sich erwiesen, wenn die Schuhpreßeinheit zumindest quer zur Bahnlaufrichtung mehrere Preßzonen aufweist, die unabhängig voneinander gesteuert werden können. Dies ermöglicht die Einstellung eines gewünschten Preßkraftprofils quer zur Bahnlaufrichtung unabhängig von der Durchbiegung des Trockenzylinders. Infolgedessen muß der Trockenzylinder auch nicht bombiert sein, was die Herstellung vereinfacht.It has proven to be particularly advantageous if the shoe press unit at least transversely to the web running direction has several press zones that are independent can be controlled from each other. This enables the setting of a desired pressing force profile transverse to the direction of web travel regardless of the deflection of the drying cylinder. As a result, the drying cylinder also not be cambered, which simplifies production.

Die erhöhte Temperatur des Trockenzylinders sorgt außerdem dafür, daß die Viskosität des Wassers im Preßspalt verringert und damit die Entwässerung verbessert wird.The increased temperature of the drying cylinder also ensures that the Viscosity of the water in the press nip is reduced and thus drainage is improved.

Nachfolgend soll die Erfindung an einem Ausführungsbeispiel näher erläutert werden. In der beigefügten Zeichnung zeigt die Figur eine schematische Teilansicht einer Maschine zur Herstellung einer Tissue-Papierbahn. Dabei sind über einen Bereich einer sogenannten Formierwalze 11 gemeinsam ein endloses Band 5 in Form eines Filzes sowie ein weiteres, endloses Formiersieb 12 geführt, wobei jedoch nur das Band 5 gänzlich um die Formierwalze 11 verläuft. In den Einlaufspalt zwischen dem Filz und dem Formiersieb 12 wird mittels eines bekannten Stoffauflaufs 8 die Faserstoffsuspension eingebracht. Die sich dabei bildende Faserstoffbahn 1 wird nach dem Umschlingungsbereich der Formierwalze 11 gemeinsam mit dem Band 5 bis zu einem verlängerten Preßspalt 4 weitergeführt. Vor Erreichen des Preßspaltes 4 umschlingt das Band 5 jedoch noch eine besaugte Vorrichtung 6 in Form einer besaugten Walze. Diese besaugte Walze entfernt einen wesentlichen Teil des Wassers aus dem Band 5 und eventuell sogar etwas aus der außen-liegenden Faserstoffbahn 1. Die Wasseraufnahmefähigkeit des Bandes 5 erhöht sich hierdurch erheblich, so daß es im folgenden verlängerten Preßspalt 4, durch den es gemeinsam mit der Faserstoffbahn 1 läuft, das ausgepreßte Wasser aufnehmen kann. Dies intensiviert die Entwässerung derart, das man mit nur einem Preßspalt 4 auskommt.The invention will be explained in more detail below using an exemplary embodiment become. In the accompanying drawing the figure shows a schematic Partial view of a machine for producing a tissue paper web. Are there over an area of a so-called forming roller 11 together an endless Band 5 in the form of a felt and another, endless forming fabric 12 out, but only the belt 5 runs entirely around the forming roller 11. In the inlet gap between the felt and the forming fabric 12 is by means of a known headbox 8 introduced the fiber suspension. Which the fibrous web 1 that is formed after the wrapping area Forming roller 11 together with the belt 5 up to an extended press nip 4 continued. Before reaching the press nip 4, the belt 5 loops however, a suction device 6 in the form of a suction roller. This suctioned roller removes a substantial part of the water from the Volume 5 and possibly even something from the outer fibrous web 1. This increases the water absorption capacity of the belt 5 considerably, so that it is in the following extended press nip 4, through which it together with the Fibrous web 1 runs, which can absorb squeezed water. This intensifies the drainage in such a way that you can get by with only one press nip 4.

Der verlängerte Preßspalt 4 wird von einem Trockenzylinder 3, der als Tissue-Trockenzylinder dient, sowie einer Schuhpreßeinheit 2 gebildet. Die Schuhpreßeinheit 2 besteht im wesentlichen aus einem flexiblen Walzenmantel sowie einer Preßvorrichtung 10, deren konkave Preßfläche von einem Anpreßschuh gebildet wird. Die Anpressung erfolgt dabei meist auf hydraulischem Weg und die Schmierung zwischen Walzenmantel und Anpreßschuh auf hydrostatische und/oder hydrodynamische Weise. Die Schuhpreßeinheit 2 weist quer zur Bahnlaufrichtung 7 mehrere unabhängig voneinander steuerbare Preßzonen auf. Hierdurch ist eine Anpassung an die Druchbiegung des Trockenzylinders 3 sowie die Einstellung eines gewünschten Preßdruckprofils quer zur Bahnlaufrichtung 7 möglich. Der verlängerte Preßspalt 4 erlaubt eine intensive und dennoch volumenschonende Entwässerung der Faserstoffbahn 1. The extended press nip 4 is a drying cylinder 3, the tissue drying cylinder serves, and a shoe press unit 2 is formed. The Shoe press unit 2 consists essentially of a flexible roll shell and a pressing device 10, the concave pressing surface of a pressure shoe is formed. The pressure is usually hydraulic and the lubrication between roller jacket and pressure shoe on hydrostatic and / or hydrodynamic manner. The shoe press unit 2 points across Web running direction 7 several independently controllable press zones on. This enables an adaptation to the bending of the drying cylinder 3 and the setting of a desired baling pressure profile transverse to the web running direction 7 possible. The extended press nip 4 allows an intensive and yet Volume-saving drainage of the fibrous web 1.

Nach dem Preßspalt 4 läuft die Faserstoffbahn 1 am beheizten Trockenzylinder 3 entlang. Die Trocknung wird in diesem Umschlingungsbereich noch durch eine Trockenhaube 13, die heiße, trockene Luft auf die Faserstoffbahn 1 bläst und wieder absaugt, verstärkt.After the press nip 4, the fibrous web 1 runs on the heated drying cylinder 3 along. Drying is still carried out in this loop area Drying hood 13, which blows hot, dry air onto the fibrous web 1 and vacuumed again, intensified.

Nach erfolgter Trocknung der Faserstoffbahn 1 wird die Faserstoffbahn 1 vom Trockenzylinder 3 über einen bekannten Kreppschaber 9 entfernt. Die gekreppte Faserstoffbahn 1 kann im Anschluß weiterbearbeitet und aufgewickelt werden.After drying of the fibrous web 1, the fibrous web 1 is from Drying cylinder 3 removed via a known crepe doctor 9. The creped Fibrous web 1 can then be further processed and wound up.

Claims (5)

  1. Machine for producing a fibrous web (1), in particular a tissue paper web, having at least one press comprising a shoe press unit (2) and a drying cylinder (3) for forming an extended press nip (4), at least one water-permeable and water-absorbing belt (5) being led through the press nip (4) in addition to the fibrous web (1), and the belt (5), together with the fibrous web (1), being led over at least one suction apparatus (6), the fibrous web (1) lying on the outside, characterized in that the suction apparatus (6) removes sufficient water from the belt and, if appropriate, from the fibrous web in order to create a water absorption capacity of the belt (5) which is sufficient for the water pressed out in the press nip.
  2. Machine for producing a fibrous web (1) according to Claim 1, characterized in that, at least transversely with respect to the web running direction (7), the shoe press unit (2) has a plurality of pressing zones which can be controlled independently of one another.
  3. Machine for producing a fibrous web (1) according to one of the preceding claims, characterized in that the suction apparatus (6) is a suction roll arranged immediately upstream of the shoe press unit (2).
  4. Machine for producing a fibrous web (1) according to one of the preceding claims, characterized in that, in the former part, the belt (5) is used to pick up the fibrous suspension from a flow box (8).
  5. Machine for producing a fibrous web (1) according to one of the preceding claims, characterized in that the drying cylinder (3) is used as a tissue drying cylinder, from which the fibrous web (1) is doctored off, preferably by means of a creping doctor (9), after drying has been carried out.
EP98121245A 1997-12-18 1998-11-07 Machine for making a paper web, in particular a tissue web Expired - Lifetime EP0926296B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19756422A DE19756422A1 (en) 1997-12-18 1997-12-18 Machine for producing a fibrous web, in particular a tissue paper web
DE19756422 1997-12-18

Publications (3)

Publication Number Publication Date
EP0926296A2 EP0926296A2 (en) 1999-06-30
EP0926296A3 EP0926296A3 (en) 2000-05-03
EP0926296B1 true EP0926296B1 (en) 2004-07-07

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EP98121245A Expired - Lifetime EP0926296B1 (en) 1997-12-18 1998-11-07 Machine for making a paper web, in particular a tissue web

Country Status (7)

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US (1) US6235160B1 (en)
EP (1) EP0926296B1 (en)
JP (1) JPH11241288A (en)
AT (1) ATE270727T1 (en)
BR (1) BR9805673A (en)
CA (1) CA2256108C (en)
DE (2) DE19756422A1 (en)

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DE102018123389A1 (en) * 2018-09-24 2020-02-13 Voith Patent Gmbh Machine and method for producing a fibrous web
DE102018123390A1 (en) * 2018-09-24 2020-03-26 Voith Patent Gmbh Machine and method for producing a fibrous web
US11220785B2 (en) 2018-10-12 2022-01-11 Valmet Aktiebolag Tissue paper making machine and a method of operating a tissue paper making machine

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DE10003685A1 (en) * 2000-01-28 2001-08-02 Voith Paper Patent Gmbh Tissue paper web forming zone is a crescent assembly with an inner blanket and a suction/blower system where the blanket/fourdrinier separate and a cleaner clears the fourdrinier which has zones of different permeability
DE10003686A1 (en) * 2000-01-28 2001-08-23 Voith Paper Patent Gmbh Machine and method for producing a tissue web
ATE352666T1 (en) * 2000-05-18 2007-02-15 Metso Paper Karlstad Ab SOFT CREPE PAPER MACHINE AND PRESS SECTION THEREOF
CA2405162C (en) * 2000-05-18 2008-12-30 Metso Paper Karlstad Ab Soft crepe paper machine and press section thereof
DE10032251A1 (en) * 2000-07-03 2002-01-17 Voith Paper Patent Gmbh Water extraction station for a web of tissue/toilet paper has a shoe press unit at the drying cylinder with an extended press gap and a suction unit within an overpressure hood at the carrier belt
DE10129613A1 (en) * 2001-06-20 2003-01-02 Voith Paper Patent Gmbh Method and device for producing a fibrous web provided with a three-dimensional surface structure
DE10130038A1 (en) * 2001-06-21 2003-01-02 Voith Paper Patent Gmbh Method and machine for producing a fibrous web
US7150110B2 (en) * 2002-01-24 2006-12-19 Voith Paper Patent Gmbh Method and an apparatus for manufacturing a fiber web provided with a three-dimensional surface structure
DE10218509A1 (en) * 2002-04-25 2003-11-06 Voith Paper Patent Gmbh Process for making a tissue web
US7297233B2 (en) * 2004-01-30 2007-11-20 Voith Paper Patent Gmbh Dewatering apparatus in a paper machine
EP2910679B1 (en) * 2011-12-07 2017-05-17 Valmet Aktiebolag An extended nip roll for a papermaking machine and a method of producing tissue paper
EP2896743B1 (en) 2014-01-20 2016-06-29 Valmet S.p.A. A process and a machine for making a tissue paper web
DE102019111441A1 (en) * 2019-05-03 2020-11-05 Voith Patent Gmbh Covering and use in a tissue machine
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DE102018123389A1 (en) * 2018-09-24 2020-02-13 Voith Patent Gmbh Machine and method for producing a fibrous web
DE102018123390A1 (en) * 2018-09-24 2020-03-26 Voith Patent Gmbh Machine and method for producing a fibrous web
US11613848B2 (en) 2018-09-24 2023-03-28 Voith Patent Gmbh Machine and method for producing a fibrous web
US11220785B2 (en) 2018-10-12 2022-01-11 Valmet Aktiebolag Tissue paper making machine and a method of operating a tissue paper making machine

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CA2256108C (en) 2007-02-20
EP0926296A3 (en) 2000-05-03
US6235160B1 (en) 2001-05-22
DE59811653D1 (en) 2004-08-12
DE19756422A1 (en) 1999-06-24
EP0926296A2 (en) 1999-06-30
BR9805673A (en) 1999-12-07
JPH11241288A (en) 1999-09-07
CA2256108A1 (en) 1999-06-18
ATE270727T1 (en) 2004-07-15

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