EP0665330A1 - Paper machine for making multi-ply paper - Google Patents

Paper machine for making multi-ply paper Download PDF

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Publication number
EP0665330A1
EP0665330A1 EP94120154A EP94120154A EP0665330A1 EP 0665330 A1 EP0665330 A1 EP 0665330A1 EP 94120154 A EP94120154 A EP 94120154A EP 94120154 A EP94120154 A EP 94120154A EP 0665330 A1 EP0665330 A1 EP 0665330A1
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EP
European Patent Office
Prior art keywords
drainage
wire
web
paper
section
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Granted
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EP94120154A
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German (de)
French (fr)
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EP0665330B1 (en
Inventor
Udo Grossmann
Dieter Egelhof
Albrecht Dr. Meinecke
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Voith Patent GmbH
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Voith Sulzer Papiermaschinen GmbH
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F9/00—Complete machines for making continuous webs of paper
    • D21F9/003—Complete machines for making continuous webs of paper of the twin-wire type
    • D21F9/006—Complete machines for making continuous webs of paper of the twin-wire type paper or board consisting of two or more layers
    • 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
    • D21F11/02—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the Fourdrinier type
    • D21F11/04—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the Fourdrinier type paper or board consisting on two or more layers
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F9/00—Complete machines for making continuous webs of paper
    • D21F9/003—Complete machines for making continuous webs of paper of the twin-wire type

Definitions

  • the invention relates to a paper machine for producing a multilayer paper web, in particular a paper machine with a plurality of twin wire formers.
  • a paper machine for producing a multilayer paper web is shown with the help of two twin wire formers.
  • a special feature of the illustrated embodiments is, on the one hand, the fact that two double-wire sections are formed with the aid of three sieve loops, the middle sieve loop leading through both sieve sections.
  • Another embodiment shows a first twin-wire former with a long, forwardly extended lower wire, on which the paper web formed by the second twin-wire former is placed through the lower wire of the second twin-wire former.
  • the aim of the illustrated embodiments is to provide a twin former that can handle the widest possible range of paper weights and screen speeds.
  • the disadvantage here is that an essential requirement for the paper webs is not met, namely that the two surfaces of the multilayer paper web formed have properties that are as uniform as possible due to the constellation of the drainage elements.
  • twin wire formers are used to produce the respective outer paper layer, the configuration of the twin wire formers with respect to the drainage elements being such that the paper webs each have the same properties on their outside and inside.
  • the twin wire former is equipped in such a way that, for example, the outside of the resulting paper webs come into contact with the first curved drainage element and the following elastically pressed drainage strips, while the sides of the paper layers formed in the final web on the inside with the fixed ones Drainage elements of the twin wire former come into contact.
  • This configuration produces a very uniform paper property, with appropriate design of the drainage strips and arrangement of the drainage strips, for example, to ensure that, depending on the requirements, the filler and / or the fine material portions are increasingly shifted to the outside. For example, this also improves the adherence of the two layers to one another by shifting the fine material portions onto the outside of the paper, as a result of which fibers increasingly appear on the adjacent inner sides of a two-layer web. This results in a better mutual "interlocking" of the layers and as a result there is better adhesion of the two layers after gouging.
  • twin wire formers used at least equivalent or even better formation and at least equivalent and often better blade properties, such as better constancy of the basis weight profile and less spreading of the strength values, at the same time bring an energy saving, in contrast to hybrid formers.
  • FIG. 1 shows an example of a twin gap former consisting of a first twin wire former UF for the lower layer and a second twin wire former OF for the upper paper layer.
  • the two twin-wire formers are arranged identically with respect to the arrangement of their dewatering elements, based on the paper running direction, the running direction being directed towards one another. Because of this arrangement, the sides of the paper layers with the same property in each case are ultimately brought together, while in turn the paper layer sides with the respective other same property form the outside of the final paper web.
  • the individual twin wire former itself is designed as follows: One upper and lower wire U1 and U2 or O1 and O2 is provided for each twin wire former, which is circulated over a corresponding number of deflecting rollers, so that it is from the headbox U3 or O3 dispensed material suspension sandwiches between the top and bottom sieve.
  • the bottom wire U2 or O2 is passed over a suction roll in which the first part of the dewatering takes place.
  • section I of the twin wire former corresponds to section I of the twin wire former.
  • the subsequent section II of the twin wire former consists of a large number of elastically compressible strips in a suction box U5 or O5, which is located within the lower wire U2 or O2, ie in the same wire loop as the breast roller U4 or O4.
  • Section II is followed by section III, in which, in the example shown, a further fixed drainage element U7 or O7 is located in the sieve loop of the lower sieve. Subsequently, still in section III, a screen separating element U8 or O8 is provided, which supports the separation of the top screen from the bottom screen with the paper layer lying thereon.
  • the bottom wire of the upper twin wire former O2 is then deflected downwards via a deflecting roller, while the lower wire of the lower twin wire former U2 runs straight on, so that the paper layer on the wire O2 comes into contact with the paper layer on the wire U2, after which it becomes Sieve O2 is supported by another flat suction device U9, from which the paper layers that have meanwhile been separated are separated and fed back to the upper twin wire former via guide rollers.
  • the screen belt U2 leads the two layers of paper that have now been brought together to the take-off point of the press section and is then guided back to the first breast roller U4 via several deflecting rollers.
  • FIG. 2 shows a similar design to FIG. 2, but here the separating suction device O8 from FIG. 1 has been omitted, the safe separation of the upper wire O1 taking place on a smooth forming roller F by lifting the upper wire O1 while the wire O2 is being lifted the web lying on it still wraps around the forming roller F.
  • the tensioning and regulating rollers S, R can lie below the screen level, which makes it particularly advantageous to achieve a lower overall height.
  • Figure 3 shows a situation similar to Figure 2, but in a particularly compact design. This was achieved in that the lower sieve O2 of the overhead twin wire former OF is identical to the upper sieve U1 of the lower twin wire former UF. As a result, this middle screen U1, O2 leads the multilayered web to the take-off point, which enables a structurally more favorable arrangement in the building.
  • Figures 4 and 5 show two combination variants of a fourdrinier with a twin sieve to form a two-ply paper.

Abstract

A paper machine forming section with two twin-wire sections for forming a multilayer paper web. Each twin wire web-forming unit consisting of a headbox, two wire loops arranged to define a common wire path for molding the web being formed in sandwich-like manner and drainage elements for each of the wire loops. The common wire path of each web-forming unit has a first section including a curved suction drainage element or roll in the first lower wire loop; a second section including opposing drainage ledges, wherein the drainage ledges are stationary on the upper side and the drainage ledges are developed resiliently pressable on the bottom side; the drainage ledges of the upper and lower sides are arranged staggered with respect to each other in the direction of travel of the wire, and at least the ledges of the upper side are developed with suction; and a third section which has at least one suction wire separating element on one side. The twin-wire forming units are so arranged that the same drainage elements are associated in each case with what will be the inner and outer sides respectively of the respective layer of the multilayer paper web.

Description

Die Erfindung betrifft eine Papiermaschine zur Herstellung einer mehrlagigen Papierbahn, insbesondere eine Papiermaschine mit mehreren Doppelsiebformern.The invention relates to a paper machine for producing a multilayer paper web, in particular a paper machine with a plurality of twin wire formers.

Eine ähnliche Papiermaschine ist aus US 4,830,709 bekannt.A similar paper machine is known from US 4,830,709.

In dieser Schrift wird eine Papiermaschine zur Herstellung einer mehrlagigen Papierbahn mit Hilfe zweier Doppelsiebformer dargestellt. Eine besondere Eigenschaft der dargestellten Ausführungsformen ist einerseits die Tatsache, daß mit Hilfe von drei Siebschlaufen zwei Doppelsiebstrecken gebildet sind, wobei die mittlere Siebschlaufe durch beide Siebstrecken führt. Eine andere Ausführungsform zeigt einen ersten Doppelsiebformer mit einem langen nach vorne gestreckten unterem Sieb, auf welches die vom zweiten Doppelsiebformer gebildete Papierbahn durch das Untersieb des zweiten Doppelsiebformers aufgelegt wird.In this document, a paper machine for producing a multilayer paper web is shown with the help of two twin wire formers. A special feature of the illustrated embodiments is, on the one hand, the fact that two double-wire sections are formed with the aid of three sieve loops, the middle sieve loop leading through both sieve sections. Another embodiment shows a first twin-wire former with a long, forwardly extended lower wire, on which the paper web formed by the second twin-wire former is placed through the lower wire of the second twin-wire former.

Das Ziel der dargestellten Ausführungsformen ist, einen Zwillingsformer anzugeben, der eine möglichst hohe Bandbreite an Papiergewichten und Siebgeschwindigkeiten beherrscht.The aim of the illustrated embodiments is to provide a twin former that can handle the widest possible range of paper weights and screen speeds.

Nachteilig ist hierbei, daß eine wesentliche Forderung an die Papierbahnen nicht erfüllt wird, nämlich die, daß die beiden Oberflächen der gebildeten mehrlagigen Papierbahn möglichst gleichmäßige Eigenschaften aufgrund der Konstellation der Entwässerungselemente aufweisen.The disadvantage here is that an essential requirement for the paper webs is not met, namely that the two surfaces of the multilayer paper web formed have properties that are as uniform as possible due to the constellation of the drainage elements.

Es ist Aufgabe der Erfindung, eine Papiermaschine mit mindestens Zwei Doppelsiebformern darzustellen, die ein mehrlagiges Papier erzeugen, welches auf den beiden Außenseiten möglichst gleichmäßige Papiereigenschaften innehat.It is an object of the invention to present a paper machine with at least two twin wire formers which produce a multi-layer paper which has the most uniform paper properties possible on the two outer sides.

Die Aufgabe wird durch die Merkmale des Anspruches 1 erfüllt. Demnach werden zur Bildung einer Papierbahn wenigstens zwei Doppelsiebformer zur Herstellung der jeweils äußeren Papierschicht herangezogen, wobei die Ausgestaltung der Doppelsiebformer bezüglich der Entwässerungselemente dergestalt ist, daß die Papierbahnen an ihrer Außen- und Innenseite jeweils gleiche Eigenschaften aufweisen. Dies wird dadurch erreicht, indem die sich bildende Papierbahn "spiegelbildlich-gleich" behandelt wird. Das heißt, der Doppelsiebformer wird so ausgestattet, daß beispielsweise jeweils die Außenseite der entstehenden Papierbahnen mit dem ersten gekrümmten Entwässerungselement und den darauf folgenden elastisch angedrückten Entwässerungsleisten in Verbindung kommen, während die in der endgültigen Bahn auf der Innenseite liegenden Seiten der gebildeten Papierlagen mit den feststehenden Entwässerungselementen des Doppelsiebformers in Kontakt kommen.The object is achieved by the features of claim 1. Accordingly, to form a paper web, at least two twin wire formers are used to produce the respective outer paper layer, the configuration of the twin wire formers with respect to the drainage elements being such that the paper webs each have the same properties on their outside and inside. This is achieved by treating the paper web which is being formed in a "mirror-image-like manner". This means that the twin wire former is equipped in such a way that, for example, the outside of the resulting paper webs come into contact with the first curved drainage element and the following elastically pressed drainage strips, while the sides of the paper layers formed in the final web on the inside with the fixed ones Drainage elements of the twin wire former come into contact.

Durch diese Ausgestaltung wird eine sehr gleichmäßige Papiereigenschaft erzeugt, wobei durch entsprechende Gestaltung der Entwässerungsleisten und Anordnung der Entwässerungsleisten beispielsweise dafür Sorge getragen werden kann, daß je nach Anforderungen die Füll- und/oder die Feinstoffanteile vermehrt zur Außenseite hin verschoben werden. Beispielsweise läßt sich hierdurch auch die Anhaftung der beiden entstehenden Lagen aneinander verbessern, indem die Feinstoffanteile auf die Außenseite des Papieres verschoben werden, wodurch an den aneinanderliegenden Innenseiten einer zweilagigen Bahn vermehrt Fasern auftreten. Dadurch findet eine bessere gegenseitige "Verzahnung" der Lagen statt und wodurch nach der Vergautschung eine bessere Haftung der beiden Lagen besteht.This configuration produces a very uniform paper property, with appropriate design of the drainage strips and arrangement of the drainage strips, for example, to ensure that, depending on the requirements, the filler and / or the fine material portions are increasingly shifted to the outside. For example, this also improves the adherence of the two layers to one another by shifting the fine material portions onto the outside of the paper, as a result of which fibers increasingly appear on the adjacent inner sides of a two-layer web. This results in a better mutual "interlocking" of the layers and as a result there is better adhesion of the two layers after gouging.

Ein weiterer Vorteil des erfindungsgemäßen Gedankens besteht darin, daß die verwendeten Doppelsiebformer bei mindestens gleichwertiger oder noch besserer Formation und mindestens gleichwertiger und oft besseren Blatteigenschaften, wie z.B. bessere Konstanz des Flächengewichtsprofils und geringere Streung der Festigkeitswerte, gleichzeitig eine Energieeinsparung mit sich bringen, im Gegensatz zu Hybridformern.Another advantage of the idea of the invention is that the twin wire formers used at least equivalent or even better formation and at least equivalent and often better blade properties, such as better constancy of the basis weight profile and less spreading of the strength values, at the same time bring an energy saving, in contrast to hybrid formers.

Die Erfindung ist anhand der Figur beschrieben. Darin ist im übrigen folgendes dargestellt: Figur 1 zeigt beispielhaft einen Zwillings-Gapformer, bestehend aus einem ersten Doppelsiebformer UF für die untere Lage und einem zweiten Doppelsiebformer OF für die obere Papierlage. Die beiden Doppelsiebformer sind bezüglich der Anordnung ihrer Entwässerungselemente, bezogen auf die Papierlaufrichtung, gleich angeordnet, wobei die Laufrichtung gegeneinander gerichtet ist. Aufgrund dieser Anordnung werden letztendlich die Seiten der Papierlagen mit jeweils gleicher Eigenschaft zusammengeführt, während wiederum die Papierlagenseiten mit der jeweils anderen gleichen Eigenschaft die Außenseite der endgültigen Papierbahn bilden. Der einzelne Doppelsiebformer selbst ist gestaltet wie folgt: Es ist je Doppelsiebformer ein Ober- und Untersieb U1 und U2 bzw. O1 und O2 vorgesehen, welches über eine entsprechende Anzahl von Umlenkwalzen im Kreis geführt wird, so daß es die vom Stoffauflauf U3 bzw. O3 abgegebene Stoffsuspension sandwichartig zwischen dem Ober- und Untersieb einschließt. Das Untersieb U2 bzw. O2 wird in diesem Falle über eine Saugwalze geleitet, in der der erste Teil der Entwässerung stattfindet. Dies entspricht der Sektion I des Doppelsiebformers. Die darauf folgende Sektion II des Doppelsiebformers besteht aus einer Vielzahl von elastisch andrückbaren Leisten in einem Saugkasten U5 bzw. O5, der sich innerhalb des Untersiebs U2 bzw. O2, d.h. in der gleichen Siebschlaufe wie die Brustwalze U4 bzw. O4, befindet. Den elastischen Leisten gegenüberstehend befindet sich jeweils ein weiterer Saugkasten U6 bzw. O6, in dem eine Vielzahl von feststehenden Entwässerungsleisten angeordnet sind und der sich in der Siebschlaufe des jeweiligen Obersiebes befindet. Auf die Sektion II folgt die Sektion III, in der im beispielhaft dargestellten Falle ein weiteres feststehendes Entwässerungselement U7 oder O7 sich in der Siebschlaufe des Untersiebes befindet. Darauf folgend weiterhin noch in der Sektion III ist ein Siebtrennelement U8 bzw. O8 vorgesehen, welches die Abtrennung des Obersiebes vom Untersieb mit der darauf liegenden Papierlage unterstützt.The invention is described with reference to the figure. The following is shown therein: FIG. 1 shows an example of a twin gap former consisting of a first twin wire former UF for the lower layer and a second twin wire former OF for the upper paper layer. The two twin-wire formers are arranged identically with respect to the arrangement of their dewatering elements, based on the paper running direction, the running direction being directed towards one another. Because of this arrangement, the sides of the paper layers with the same property in each case are ultimately brought together, while in turn the paper layer sides with the respective other same property form the outside of the final paper web. The individual twin wire former itself is designed as follows: One upper and lower wire U1 and U2 or O1 and O2 is provided for each twin wire former, which is circulated over a corresponding number of deflecting rollers, so that it is from the headbox U3 or O3 dispensed material suspension sandwiches between the top and bottom sieve. In this case, the bottom wire U2 or O2 is passed over a suction roll in which the first part of the dewatering takes place. This corresponds to section I of the twin wire former. The subsequent section II of the twin wire former consists of a large number of elastically compressible strips in a suction box U5 or O5, which is located within the lower wire U2 or O2, ie in the same wire loop as the breast roller U4 or O4. Opposite the elastic strips is another suction box U6 or O6, in which a plurality of fixed drainage strips are arranged and which is located in the sieve loop of the respective top sieve. Section II is followed by section III, in which, in the example shown, a further fixed drainage element U7 or O7 is located in the sieve loop of the lower sieve. Subsequently, still in section III, a screen separating element U8 or O8 is provided, which supports the separation of the top screen from the bottom screen with the paper layer lying thereon.

Im dargestellten Fall wird danach das Untersieb des oberen Doppelsiebformers O2 über eine Umlenkwalze nach unten umgelenkt, während das Untersieb des unteren Doppelsiebformers U2 geradeaus weiterläuft, so daß die Papierlage auf dem Sieb O2 mit der Papierlage auf dem Sieb U2 in Berührung kommt, danach wird das Sieb O2 unterstützt von einem weiteren Flachsauger U9, von dem sich inzwischen verbundenen Papierlagen abgetrennt und dem oberen Doppelsiebformer über Leitwalzen wieder zugeführt. Das Siebband U2 führt die nun zusammengeführten zwei Papierlagen weiter zur Abnahmestelle der Pressenpartie und wird danach über mehrere Umlenkwalzen wieder zurück zur ersten Brustwalze U4 geführt.In the case shown, the bottom wire of the upper twin wire former O2 is then deflected downwards via a deflecting roller, while the lower wire of the lower twin wire former U2 runs straight on, so that the paper layer on the wire O2 comes into contact with the paper layer on the wire U2, after which it becomes Sieve O2 is supported by another flat suction device U9, from which the paper layers that have meanwhile been separated are separated and fed back to the upper twin wire former via guide rollers. The screen belt U2 leads the two layers of paper that have now been brought together to the take-off point of the press section and is then guided back to the first breast roller U4 via several deflecting rollers.

Figur 2 zeigt eine ähnliche Ausführung wie Figur 2, jedoch ist hier der Trennsauger O8 aus der Figur 1 entfallen, wobei die sichere Trennung des Obersiebes O1 an einer glatten Formierwalze F stattfindet, indem das Obersieb O1 schon abgehoben wird, während das Sieb O2 mit der darauf liegenden Bahn noch die Formierwalze F umschlingt. In der gezeigten Ausführungsform können die Spann- und Regulierwalzen S,R unterhalb der Sieb-Ebene liegen, wodurch besonders vorteilhaft eine geringere Bauhöhe zu verwirklichen ist.FIG. 2 shows a similar design to FIG. 2, but here the separating suction device O8 from FIG. 1 has been omitted, the safe separation of the upper wire O1 taking place on a smooth forming roller F by lifting the upper wire O1 while the wire O2 is being lifted the web lying on it still wraps around the forming roller F. In the embodiment shown, the tensioning and regulating rollers S, R can lie below the screen level, which makes it particularly advantageous to achieve a lower overall height.

Figur 3 zeigt eine Situation ähnlich Figur 2, jedoch in besonders kompakter Bauweise. Dies wurde dadurch erreicht, daß das untere Sieb O2 des oben liegenden Doppelsiebformers OF identisch mit dem oberen Sieb U1 des unten liegenden Doppelsiebformers UF ist. Dadurch führt dieses mittlere Sieb U1,O2 die mehrlagige Bahn zur Abnahmestelle, wodurch eine bautechnisch günstigere Anordnung im Gebäude ermöglicht ist.Figure 3 shows a situation similar to Figure 2, but in a particularly compact design. This was achieved in that the lower sieve O2 of the overhead twin wire former OF is identical to the upper sieve U1 of the lower twin wire former UF. As a result, this middle screen U1, O2 leads the multilayered web to the take-off point, which enables a structurally more favorable arrangement in the building.

Die Figuren 4 und 5 zeigen zwei Kombinationsvarianten eines Langsiebes mit einem Doppelsieb zur Bildung eines zweilagigen Papieres.Figures 4 and 5 show two combination variants of a fourdrinier with a twin sieve to form a two-ply paper.

Claims (3)

Papiermaschine zur Herstellung einer mehrlagigen Papierbahn, wobei 1.1 jeder Lage eine bahnbildende Einheit bestehend aus: 1.1.1 einem Stoffauflauf; 1.1.2 zwei sandwichartig angeordneten Siebschlaufen und 1.1.3 einem Entwässerungselement, jeder der Siebschlaufen zugeordnet ist; gekennzeichnet durch die folgende Ausgestaltung der bahnbildenden Einheiten: 1.2 die bahnbildende Einheit zumindest der äußeren Lagen besitzt 1.2.1 je eine erste Sektion (I) bestehend aus einem gekrümmten und besaugten Entwässerungselement in der ersten unteren Siebschlaufe; 1.2.2 eine zweite Sektion (II) mit gegenüberliegenden Entwässerungsleisten; wobei 1.2.2.1 die Entwässerungsleisten auf der Oberseite feststehend sind; 1.2.2.2 die Entwässerungsleisten auf der Unterseite elastisch andrückbar ausgebildet sind; 1.2.2.3 die Entwässerungsleisten der Ober- und Unterseite in Sieblaufrichtung zueinander versetzt angeordnet sind; und 1.2.2.4 zumindest die Leisten der Oberseite besaugt ausgebildet sind; 1.2.3 eine dritte Sektion (III), die einseitig mindestens ein besaugtes Siebtrennelement besitzt; 1.3 die Bahnbildungseinheiten sind derart angeordnet, daß der jeweils inneren bzw. äußeren Seite der Papierbahn die gleichen Entwässerungselemente zugeordnet sind. Paper machine for producing a multilayer paper web, wherein 1.1 each layer a web-forming unit consisting of: 1.1.1 a headbox; 1.1.2 two sandwich-like sieve loops and 1.1.3 a drainage element, each of the sieve loops is assigned; characterized by the following configuration of the web-forming units: 1.2 the web-forming unit has at least the outer layers 1.2.1 a first section (I) each consisting of a curved and suctioned drainage element in the first lower sieve loop; 1.2.2 a second section (II) with opposite drainage strips; in which 1.2.2.1 the drainage strips are fixed on the top; 1.2.2.2 the drainage strips are designed to be elastically pressable on the underside; 1.2.2.3 the drainage strips of the top and bottom are arranged offset to each other in the direction of the wire; and 1.2.2.4 at least the strips of the top are suctioned; 1.2.3 a third section (III) which has at least one suction-separated screen separating element on one side; 1.3 the web formation units are arranged such that the same inner and outer side of the paper web are assigned the same drainage elements. Papiermaschine gemäß Anspruch 1, dadurch gekennzeichnet, daß das gekrümmte Entwässerungselement der Sektion (I) als besaugte Brustwalze ausgebildet ist.Paper machine according to claim 1, characterized in that the curved drainage element the section (I) is designed as a sucked breast roller. Papiermaschine gemäß einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß in der Sektion (III) ein weiteres flaches Entwässerungselement vorgesehen ist.Paper machine according to one of claims 1 or 2, characterized in that a further flat drainage element is provided in section (III).
EP94120154A 1994-01-27 1994-12-20 Paper machine for making multi-ply paper Expired - Lifetime EP0665330B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4402273 1994-01-27
DE4402273A DE4402273C2 (en) 1994-01-27 1994-01-27 Paper machine for the production of multilayer paper webs

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EP0665330A1 true EP0665330A1 (en) 1995-08-02
EP0665330B1 EP0665330B1 (en) 2000-03-22

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US (2) US5635033A (en)
EP (1) EP0665330B1 (en)
JP (1) JPH07258991A (en)
CN (1) CN1119688A (en)
AT (1) ATE191024T1 (en)
CA (2) CA2141278A1 (en)
DE (2) DE4402273C2 (en)
FI (1) FI113194B (en)

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Publication number Priority date Publication date Assignee Title
DE19949354A1 (en) * 1999-10-13 2001-04-19 Voith Paper Patent Gmbh Assembly for the prodn of a multi-layer paper/cardboard web has a number of web formation zones with their stock inlets for secondary layers to be laid on the primary layer with bonding between them
DE102011083308A1 (en) 2011-09-23 2013-03-28 Voith Patent Gmbh Sheet forming device for a machine for producing a fibrous web from at least one pulp suspension

Families Citing this family (28)

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Publication number Priority date Publication date Assignee Title
DE4328024A1 (en) * 1993-08-20 1995-02-23 Voith Gmbh J M Twin-wire sheet former
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DE4402274C2 (en) * 1994-01-27 1995-04-06 Voith Gmbh J M Twin-wire section
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US5607555A (en) 1997-03-04
DE59409232D1 (en) 2000-04-27
ATE191024T1 (en) 2000-04-15
DE4402273C2 (en) 1995-11-23
CA2141279A1 (en) 1995-07-28
DE4402273A1 (en) 1994-06-16
CA2141278A1 (en) 1995-07-28
EP0665330B1 (en) 2000-03-22
FI113194B (en) 2004-03-15
FI950336A (en) 1995-07-28
CN1119688A (en) 1996-04-03
US5635033A (en) 1997-06-03
FI950336A0 (en) 1995-01-26
JPH07258991A (en) 1995-10-09

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