EP0761874B1 - Device for making multilayer paper or cardboard - Google Patents

Device for making multilayer paper or cardboard Download PDF

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Publication number
EP0761874B1
EP0761874B1 EP96112594A EP96112594A EP0761874B1 EP 0761874 B1 EP0761874 B1 EP 0761874B1 EP 96112594 A EP96112594 A EP 96112594A EP 96112594 A EP96112594 A EP 96112594A EP 0761874 B1 EP0761874 B1 EP 0761874B1
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EP
European Patent Office
Prior art keywords
wire
forming
foils
suspension
jet
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Revoked
Application number
EP96112594A
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German (de)
French (fr)
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EP0761874A3 (en
EP0761874A2 (en
Inventor
Heinz Steckenreuter
Helmut Stoerr
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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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Classifications

    • 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 device for producing a multilayer Paper or cardboard according to the preamble of claim 1.
  • the invention has for its object a device of the beginning to create mentioned genus, with which the advantages of the with relatively little effort Formation influence, the high gap strength and the plybond are realizable.
  • the device according to the invention has the essential advantage that Forming roller optimal sheet formation takes place and due to the centrifugal forces in the Forming roller area very early on the fine substances supporting the rubber effect the later rubber side of the top layer.
  • the subsequent relative steeply descending twin-wire section with forming strips promotes removal of water.
  • the strips can be without or with little negative pressure be worked because the falling water essentially only redirects must become.
  • the former is easy to regulate and requires little energy. So is achieved overall with relatively simple means that when bringing together the upper with the lower layer sets a high gap strength without the Formation has been negatively affected.
  • the forming strips in the downward part of the twin wire former can be on one or be attached on both sides. As is well known, such strips are used in this way the sieves pressed that they change their course. This results in printing and Suction effect on the fiber suspension layer between the sieves.
  • the fine matter important for gushing can be controlled by controlled vacuum and / or sensitively adjustable forming strips on the outer screen with particularly good ones Effect concentrated in the side of the upper layer that later served as a gulp become.
  • Forming roll drainage to produce a reduced L / Q ratio is that the strength ratio of the dry web, measured lengthways, put in relation for cross-measured strength.
  • FIG. 1 shows an example of a device belonging to the device according to the invention Twin wire former 3.
  • An inner wire 4 and an outer wire 5 are in the area of Forming roller 8 merged. Introduces into this area of the gusset Headbox 1 a suspension jet 9.
  • the two screens 4 and 5 as well as the Intermediate suspension layer are on the forming roller 8 in drained substantially in the course of the wrap angle ⁇ . Part of the water can be thrown through the outer sieve 5 into the water pan 14.
  • the Twin wire is then guided tangentially away from the forming roller 8, wherein it essentially has a downward direction.
  • Embodiment are on both sides, i.e. in the inner sieve 4 and in the outer sieve 5, Forming strips 10 and 11 attached. However, strips on both sides are not always required.
  • 5 strips 11 attached to the outer sieve for Sieve movably and elastically supported.
  • the water passing through the sieves on the strips becomes in water tanks 12 or 13 caught.
  • Water tub 12 may be provided with a vacuum. This extra effort is but only necessary in special cases.
  • the fiber layer being held on the inner sieve 4 and at Deflection via the deflection roller 15 to the lower one formed on the primary longitudinal screen 2 Layer 7 is filed.
  • the multilayered web thus created remains on the Primary longitudinal screen 2, while the inner screen 4 is lifted and to the forming roller 8 is returned.
  • a suction box 16 can hold the layers on the Favor primary longitudinal screen 2.
  • Fig. 2 the headbox 1 and 1 'is shown very schematically in two extreme positions. It can be seen that on the beam 9, which forms a plane, the surface normal N is drawn. This surface normal N takes the angle ⁇ to the vertical V1 (left Side of the figure). The right side of the figure shows a perpendicular one Suspension beam 9 ', the normal N' of which forms an angle ⁇ 'to the vertical V1.
  • the sector 12 is shown in FIG. 3. It is limited by an angle ⁇ with respect to the vertical V2 inwards and by an angle ⁇ 'with respect to the Vertical V2 outwards.
  • the two screens 4 and 5 should be one in this area Take course that lies within sector 12.
  • the sieves run between forming strips 10, 11 arranged on both sides of the sieves meandering, as it is exaggerated in Fig. 4. You can see between adjacent, opposing forming strips 10 and 11, the deflection H of Sieves, shown here by arrows on the outer sieve 5.
  • this principle can also be reversed in the manner that after the separation of the inner wire 4 from the outer wire 5, the upper layer 6 on the Outer sieve 5 remains and is deposited by it onto the lower layer 7.
  • FIG. 7 shows a favorable technical design of the separating suction device 17. He is realized by dividing the water pan 12 and placed under negative pressure. It contains several sieve guide strips 18.

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  • Paper (AREA)

Description

Die Erfindung bezieht sich auf eine Vorrichtung zum Herstellen eines mehrlagigen Papiers oder Kartons gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a device for producing a multilayer Paper or cardboard according to the preamble of claim 1.

Vorrichtungen dieser Art (vgl. z.B. DE-A-32 26 388) haben den Vorteil, daß die Lagen separat gebildet werden können. Dabei kann es jedoch, insbesondere bei mehrlagigem Karton, zu sogenannten Spaltfestigkeitsproblemen kommen, d.h. zu Problemen hinsichtlich der Haftung zwischen den Lagen. Auch sind die aufgesetzten Doppelsiebformer sehr aufwendig, sowohl bezüglich der Vorrichtung, als auch des Platz- und Energiebedarfes.Devices of this type (see e.g. DE-A-32 26 388) have the advantage that the layers are formed separately can. However, this can lead to so-called, especially in the case of multilayer cardboard Gap strength problems arise, i.e. to problems regarding liability between the layers. The attached twin wire formers are also very complex, both in terms of the device, as well as the space and energy requirements.

Daher liegt der Erfindung die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Gattung zu schaffen, bei der mit relativ wenig Aufwand die Vorteile der Formationsbeeinflussung, der hohen Spaltfestigkeit und des Plybond realisierbar sind.Therefore, the invention has for its object a device of the beginning to create mentioned genus, with which the advantages of the with relatively little effort Formation influence, the high gap strength and the plybond are realizable.

Dies wird erfindungsgemäß durch die im Kennzeichen des Anspruchs 1 beschriebenen Maßnahmen erreicht.This is inventively described by the characterizing part of claim 1 Measures achieved.

Die erfindungsgemäße Vorrichtung hat den wesentlichen Vorteil, daß durch die Formierwalze eine optimale Blattbildung erfolgt und infolge der Zentrifugalkräfte im Formierwalzenbereich die die Gautschwirkung unterstützenden Feinstoffe sehr früh an die spätere Gautschseite der oberen Lage gebracht werden. Die anschließende relativ steil abwärts führende Doppelsiebstrecke mit Formierleisten begünstigt das Abführen von Wasser. Dabei kann an den Leisten ganz ohne oder mit geringem Unterdruck gearbeitet werden, da das herabstürzende Wasser im wesentlichen nur umgelenkt werden muß. Der Former ist leicht zu regeln und erfordert wenig Energieaufwand. So wird insgesamt mit relativ einfachen Mitteln erreicht, daß sich beim Zusammenbringen der oberen mit der unteren Lage eine hohe Spaltfestigkeit einstellt, ohne daß die Formation negativ beeinflußt worden ist.The device according to the invention has the essential advantage that Forming roller optimal sheet formation takes place and due to the centrifugal forces in the Forming roller area very early on the fine substances supporting the rubber effect the later rubber side of the top layer. The subsequent relative steeply descending twin-wire section with forming strips promotes removal of water. The strips can be without or with little negative pressure be worked because the falling water essentially only redirects must become. The former is easy to regulate and requires little energy. So is achieved overall with relatively simple means that when bringing together the upper with the lower layer sets a high gap strength without the Formation has been negatively affected.

Die Formierleisten im abwärts gerichteten Teil des Doppelsiebformers können auf einer oder auf beiden Seiten angebracht sein. Bekanntlich werden solche Leisten derart gegen die Siebe angedrückt, daß sie deren Verlauf verändern. Dadurch erfolgen Druck- und Sogwirkung auf die zwischen den Sieben befindliche Fasersuspensionsschicht.The forming strips in the downward part of the twin wire former can be on one or be attached on both sides. As is well known, such strips are used in this way the sieves pressed that they change their course. This results in printing and Suction effect on the fiber suspension layer between the sieves.

Die zur Vergautschung wichtigen Feinstoffe können durch gesteuerten Unterdruck und/oder feinfühlig verstellbare Formierleisten am Außensieb mit besonders guter Wirkung in der später zur Vergautschung dienenden Seite der oberen Lage konzentriert werden.The fine matter important for gushing can be controlled by controlled vacuum and / or sensitively adjustable forming strips on the outer screen with particularly good ones Effect concentrated in the side of the upper layer that later served as a gulp become.

Als dem Sieb zugewandte Hüllfläche von hintereinanderliegenden Leisten ist sowohl eine gerade als auch eine konvexe Kontur möglich. Erfindungsgemäß kann durch Formierwalzenentwässerung ein verringertes L/Q-Verhältnis erzeugt werden, ist das das Festigkeitsverhältnis der trockenen Bahn, längs gemessen, ins Verhältnis gesetzt zur quergemessenen Festigkeit.As the enveloping surface of the strips facing one another, both are straight as well as a convex contour possible. According to the invention Forming roll drainage to produce a reduced L / Q ratio is that the strength ratio of the dry web, measured lengthways, put in relation for cross-measured strength.

Die Erfindung wird beschrieben und erläutert anhand von schematischen Zeichnungen in Seitenansicht. Dabei zeigen:

Fig. 1
Beispiel für die erfindungsgemäße Vorrichtung;
Fig. 2
Erläuterungen zur Festlegung der Parameter im Bereich der Formierwalze;
Fig. 3+4
desgleichen im Bereich des Doppelsiebs nach der Formierwalze;
Fig. 5+6
weitere Formen des Erfindungsgegenstandes;
Fig. 7
eine Variante im Detail.
The invention is described and explained with reference to schematic drawings in side view. Show:
Fig. 1
Example of the device according to the invention;
Fig. 2
Explanations for defining the parameters in the area of the forming roller;
3 + 4
likewise in the area of the twin wire after the forming roller;
5 + 6
further forms of the subject matter of the invention;
Fig. 7
a variant in detail.

Die Fig. 1 zeigt ein Beispiel eines zur erfindungsgemäßen Vorrichtung gehörenden Doppelsiebformers 3. Ein Innensieb 4 und ein Außensieb 5 werden im Bereich der Formierwalze 8 zusammengeführt. In diesen Bereich des Siebzwickels führt ein Stoffauflauf 1 einen Suspensionsstrahl 9 ein. Die beiden Siebe 4 und 5 sowie die dazwischen befindliche Suspensionsschicht werden auf der Formierwalze 8 im wesentlichen im Verlauf des Umschlingungswinkels ∂ entwässert. Ein Teil des Wassers kann dabei durch das Außensieb 5 in die Wasserwanne 14 abgeschleudert werden. Das Doppelsieb wird anschließend von der Formierwalze 8 tangential weggeführt, wobei es im wesentlichen eine abwärtsführende Richtung hat. In der hier gezeigten Ausführungsform sind auf beiden Seiten, d.h. im Innensieb 4 und im Außensieb 5, Formierleisten 10 bzw. 11 angebracht. Beidseitig angebrachte Leisten sind aber nicht immer erforderlich. Mit Vorteil können im Außensieb 5 angebrachte Leisten 11 zum Sieb hin beweglich und elastisch abgestützt ausgeführt sein. In an sich bekannter Weise wird das an den Leisten durch die Siebe hindurchtretende Wasser in Wasserwannen 12 bzw. 13 aufgefangen. In besonderen Fällen kann z.B. die im Innensieb 4 liegende Wasserwanne 12 mit einem Unterdruck versehen sein. Dieser zusätzliche Aufwand ist aber nur in Sonderfällen notwendig. Nach Verlassen des Formierleistenbereiches werden die beiden Siebe getrennt, wobei die Faserschicht am Innensieb 4 gehalten und bei Umlenkung über die Umlenkwalze 15 auf die auf dem Primärlangsieb 2 gebildete untere Lage 7 abgelegt wird. Die so entstandene Mehrlagenbahn verbleibt auf dem Primärlangsieb 2, während das Innensieb 4 abgehoben und zur Formierwalze 8 zurückgeführt wird. Ein Saugkasten 16 kann das Halten der Lagen auf dem Primärlangsieb 2 begünstigen.1 shows an example of a device belonging to the device according to the invention Twin wire former 3. An inner wire 4 and an outer wire 5 are in the area of Forming roller 8 merged. Introduces into this area of the gusset Headbox 1 a suspension jet 9. The two screens 4 and 5 as well as the Intermediate suspension layer are on the forming roller 8 in drained substantially in the course of the wrap angle ∂. Part of the water can be thrown through the outer sieve 5 into the water pan 14. The Twin wire is then guided tangentially away from the forming roller 8, wherein it essentially has a downward direction. In the shown here Embodiment are on both sides, i.e. in the inner sieve 4 and in the outer sieve 5, Forming strips 10 and 11 attached. However, strips on both sides are not always required. Advantageously, 5 strips 11 attached to the outer sieve for Sieve movably and elastically supported. In a manner known per se the water passing through the sieves on the strips becomes in water tanks 12 or 13 caught. In special cases e.g. the one in the inner sieve 4 Water tub 12 may be provided with a vacuum. This extra effort is but only necessary in special cases. After leaving the formation bar area the two sieves separated, the fiber layer being held on the inner sieve 4 and at Deflection via the deflection roller 15 to the lower one formed on the primary longitudinal screen 2 Layer 7 is filed. The multilayered web thus created remains on the Primary longitudinal screen 2, while the inner screen 4 is lifted and to the forming roller 8 is returned. A suction box 16 can hold the layers on the Favor primary longitudinal screen 2.

In Fig. 2 ist sehr schematisch der Stoffauflauf 1 bzw. 1' in zwei extremen Lagen gezeigt. Man sieht, daß auf dem Strahl 9, der eine Ebene bildet, die Flächennormale N eingezeichnet ist. Diese Flächennormale N nimmt zur vertikalen V1 den Winkel α (linke Seite der Figur) ein. Die rechte Seite der Figur zeigt einen senkrecht gebildeten Suspensionsstrahl 9', dessen Normale N' zur vertikalen V1 einen Winkel α' bildet.In Fig. 2 the headbox 1 and 1 'is shown very schematically in two extreme positions. It can be seen that on the beam 9, which forms a plane, the surface normal N is drawn. This surface normal N takes the angle α to the vertical V1 (left Side of the figure). The right side of the figure shows a perpendicular one Suspension beam 9 ', the normal N' of which forms an angle α 'to the vertical V1.

In Fig. 3 ist der Sektor 12 eingezeichnet. Er wird begrenzt durch einen Winkel β bezüglich der Vertikalen V2 nach innen und durch einen Winkel ß' bezüglich der Vertikalen V2 nach außen. Die beiden Siebe 4 und 5 sollen in diesem Bereich einen Verlauf einnehmen, der innerhalb des Sektors 12 liegt. The sector 12 is shown in FIG. 3. It is limited by an angle β with respect to the vertical V2 inwards and by an angle β 'with respect to the Vertical V2 outwards. The two screens 4 and 5 should be one in this area Take course that lies within sector 12.

Zwischen beidseitig der Siebe angeordneten Formierleisten 10, 11 verlaufen die Siebe mäanderförmig, wie es übertrieben in Fig. 4 dargestellt ist. Man erkennt zwischen benachbarten, sich gegenüberstehenden Formierleisten 10 und 11 die Ablenkung H der Siebe, hier durch Maßpfeile am Außensieb 5 gezeigt.The sieves run between forming strips 10, 11 arranged on both sides of the sieves meandering, as it is exaggerated in Fig. 4. You can see between adjacent, opposing forming strips 10 and 11, the deflection H of Sieves, shown here by arrows on the outer sieve 5.

Eine weitere Variante in der Anordnung ist denkbar, wenn zwar die obere Lage 6 auf dem Innensieb 4 gehalten wird, wie in Fig. 1 gezeigt, der Formierleistenbereich jedoch eine Krümmung hat, die entgegen der Formierwalze 8 ist (Fig. 5). Diese spezielle Form bringt bei sonst gleichen Verhältnissen einen größeren Umschlingungswinkel δ an der Formierwalze 8 mit sich. Ein Trennsauger 17 hält dabei die Faserschicht am Innensieb 4.Another variant in the arrangement is conceivable if the upper layer 6 on the The inner screen 4 is held, as shown in FIG. 1, but the forming strip area is one Has curvature that is opposite to the forming roller 8 (Fig. 5). This special shape brings a larger wrap angle δ at the otherwise the same conditions Forming roller 8 with itself. A separating suction device 17 holds the fiber layer on the inner wire 4th

In den in Fig. 1 und 5 gezeigten Ausführungsformen des Erfindungsgegenstandes wird die im Doppelsiebformer gebildete obere Lage 6 nach der Siebtrennung auf dem Innensieb 4 gehalten und anschließend auf die untere Lage 7 abgelegt. Diese Anordnung ist in den meisten Fällen zur Lösung der gestellten Aufgabe optimal.In the embodiments of the subject matter shown in FIGS. 1 and 5, the upper layer 6 formed in the twin wire former after separation of the wires on the inner wire 4 held and then placed on the lower layer 7. This arrangement is in the most cases to solve the task optimally.

Wie die Fig. 6 zeigt, ist aber auch eine Umkehrung dieses Prinzips in der Art möglich, daß nach der Trennung des Innensiebs 4 vom Außensieb 5 die obere Lage 6 auf dem Außensieb 5 verbleibt und von diesem auf die untere Lage 7 abgelegt wird.As FIG. 6 shows, this principle can also be reversed in the manner that after the separation of the inner wire 4 from the outer wire 5, the upper layer 6 on the Outer sieve 5 remains and is deposited by it onto the lower layer 7.

In Fig. 7 ist eine günstige technische Ausführung des Trennsaugers 17 dargestellt. Er wird durch Abteilen von der Wasserwanne 12 realisiert und unter Unterdruck gesetzt. Er enthält mehrere Siebführungsleisten 18.FIG. 7 shows a favorable technical design of the separating suction device 17. He is realized by dividing the water pan 12 and placed under negative pressure. It contains several sieve guide strips 18.

Claims (16)

  1. Apparatus for producing multi-ply paper or board, having a primary fourdrinier wire (2) and a twin-wire former (3) which is arranged above the former and designed as a gap former and has an inner wire (4) and an outer wire (5) and also, in the twin-wire area, forming foils (10, 11) which bear against at least one of these wires and change the course of the wire, the twin-wire former (3) forming an upper ply (6) of the multi-ply paper or board and depositing it onto a lower ply (7), by the two wires (4 and 5) being separated again and the upper ply (6) being led onward to the primary fourdrinier wire (2) on the inner wire (4) or outer wire (5),
    characterized in that
    a) the twin-wire former (3) has, at the start, a forming roll (8) of at least 800 mm external diameter, around which the inner wire (4) wraps,
    b) the angle (α) which is formed between the vertical (V1) and the normal (N) dropped to the jet of suspension (9) as the latter strikes the forming roll (8) is between -60° (jet of suspension aimed upwards) and +90° (jet of suspension aimed downwards),
    c) downstream of the forming roll (8), in the area of the forming foils (10, 11), the inner wire (4) and outer wire (5) assume a course which is oriented downwards and, at the same time, lies within a sector (12) which, in relation to the inner wire side, deviates from the vertical (V2) at an angle (β) of at most 10° and, in relation to the outer wire side, deviates from the vertical (V2) at an angle (β') of at most 45°.
  2. Apparatus according to Claim 1, characterized in that the angle (α) which is formed between the vertical (V1) and the normal (N) dropped to the jet of suspension (9) as the latter strikes the forming roll (8) is between -10° (jet of suspension aimed slightly upwards) and +90° (jet of suspension aimed downwards).
  3. Apparatus according to Claim 1 or 2, characterized in that forming foils (10 and 11) are fitted to both sides 'in the downwardly oriented area of the twin wire.
  4. Apparatus according to Claim 3, characterized in that, in the area of the forming foils (10, 11), the wires form a serpentine course.
  5. Apparatus according to Claim 14, characterized in that the serpentine form is produced by deflecting (H) the wires in the range between 0.5 and 5 mm at adjacent, mutually opposite forming foils (10, 11).
  6. Apparatus according to Claim 1, 2, 3, 4 or 5, characterized in that a number of forming foils (10, 11) belonging to one wire and arranged directly one after another in the running direction, as viewed in the wire running direction, form a curved envelope curve on their side facing the wire.
  7. Apparatus according to Claim 6, characterized in that the curvature of the envelope curve has the same direction of curvature as the forming roll (8).
  8. Apparatus according to Claim 1, 2, 3, 4, 5, 6 or 7, characterized in that the wrap angle (∂) of the two wires (4, 5) on the forming roll (8) is 10° to 180°.
  9. Apparatus according to Claim 8, characterized in that the wrap angle (∂) of the two wires (4, 5) on the forming roll (8) is 10° to 100°.
  10. Apparatus according to Claim 1 or 2, characterized in that no vacuum is applied in the area of at least 90% of the forming foils (10, 11).
  11. Apparatus according to Claim 10, characterized in that vacuum is applied to none of the forming foils (10, 11).
  12. Apparatus according to Claim 3, 4 or 5, characterized in that the forming foils (11) bearing on the outer wire (5) can be moved towards the wire and are supported resiliently.
  13. Apparatus according to one of the preceding claims, characterized in that downstream of the forming foils (10, 11), in the running direction, a suction separator (17), in whose active range the outer wire (5) is led away, bears on the inner wire (4).
  14. Apparatus according to Claim 13, characterized in that the suction separator (17) is constructed as a structural unit together with the water trough (12) that accommodates the forming foils (10) on the inner wire (4), a vacuum different from that in the water trough (12) being possible as a result of separation in the suction separator (17).
  15. Apparatus according to one of the preceding claims, characterized in that a vacuum directed inwards is applied to the forming roll (8) in the wrap area.
  16. Apparatus according to one of the preceding claims, characterized in that the upper ply (6) is fed to the lower ply (7) in such a way that, after the inner wire (4) has been separated from the outer wire (5), the upper ply is held on the inner wire (4) and then deposited onto the lower ply (7).
EP96112594A 1995-08-23 1996-08-03 Device for making multilayer paper or cardboard Revoked EP0761874B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19530983A DE19530983B4 (en) 1995-08-23 1995-08-23 Device for producing a multilayer paper or cardboard
DE19530983 1995-08-23

Publications (3)

Publication Number Publication Date
EP0761874A2 EP0761874A2 (en) 1997-03-12
EP0761874A3 EP0761874A3 (en) 1998-01-14
EP0761874B1 true EP0761874B1 (en) 2001-06-13

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EP96112594A Revoked EP0761874B1 (en) 1995-08-23 1996-08-03 Device for making multilayer paper or cardboard

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US (1) US5788816A (en)
EP (1) EP0761874B1 (en)
DE (1) DE19530983B4 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6702926B1 (en) * 1996-12-11 2004-03-09 Voith Sulzer Papiermaschinen Gmbh Process for forming a multi-ply fiber web
DE19651493A1 (en) * 1996-12-11 1998-06-18 Voith Sulzer Papiermasch Gmbh Sieve section and method for forming a multi-layer fibrous web
DE19803591A1 (en) * 1998-01-30 1999-08-05 Voith Sulzer Papiertech Patent Twin-wire former
DE19903943A1 (en) * 1999-01-28 2000-08-03 Voith Sulzer Papiertech Patent Method and device for forming a fibrous web
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
DE19950806A1 (en) * 1999-10-21 2001-04-26 Voith Paper Patent Gmbh Twin wire former
DE10161056A1 (en) * 2001-12-12 2003-06-26 Voith Paper Patent Gmbh Wire section
DE10303464A1 (en) * 2003-01-29 2004-09-30 Voith Paper Patent Gmbh Papermaking process has two de-watering sieve belts running back-to-back and tangentially deflected at the mid-point by a transverse wiper blade
DE50309144D1 (en) * 2002-09-13 2008-03-27 Voith Patent Gmbh Twin-wire former for producing a fibrous web
DE102007015638A1 (en) * 2007-03-31 2008-10-02 Voith Patent Gmbh Machine for producing a tissue web, in particular a tissue machine
DE102008002280A1 (en) 2008-06-06 2009-12-10 Voith Patent Gmbh Process for the preparation of testliner and / or corrugating agent
DE102008002278A1 (en) 2008-06-06 2009-12-10 Voith Patent Gmbh Process for the preparation of testliner and / or corrugating agent

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE759845A (en) * 1969-12-12 1971-05-17 Beloit Corp PERFECTED FORMING DEVICE
US3915791A (en) * 1972-05-12 1975-10-28 Black Clawson Co Method for producing multi-ply paper on a twin-wire machine
JPS547884B2 (en) * 1973-03-12 1979-04-11
US3944464A (en) * 1974-05-10 1976-03-16 International Paper Company Forming section for twin-wire papermaking machine
FI70739C (en) * 1977-04-28 1986-10-06 Valmet Oy BANBILDNINGSENHET VID FRAMSTAELLNING AV FLERSKIKTSKARTONG
AT370796B (en) * 1981-04-27 1983-05-10 Escher Wyss Gmbh DOUBLE SCREEN PAPER
DE3226388C2 (en) * 1982-07-15 1985-06-13 Sulzer-Escher Wyss GmbH, 7980 Ravensburg Device for removing the edges of the stock suspension when the stock emerges from the headbox of a paper machine
FI98540C (en) * 1989-05-08 1997-07-10 Valmet Corp Device for forming a paper or board web of fibrous material
US5389206A (en) * 1989-08-22 1995-02-14 J. M. Voith Gmbh Twin wire former
DE4026953C2 (en) * 1990-01-26 1995-11-30 Escher Wyss Gmbh Dewatering device and method for dewatering on a twin wire former
DE4102065C2 (en) * 1991-01-24 1996-02-01 Voith Sulzer Papiermasch Gmbh Twin wire former
MY131659A (en) * 1993-12-08 2007-08-30 Beloit Technologies Inc Machine and method for forming multiply linerboard from two sheets
DE4402273C2 (en) * 1994-01-27 1995-11-23 Voith Gmbh J M Paper machine for the production of multilayer paper webs

Also Published As

Publication number Publication date
EP0761874A3 (en) 1998-01-14
US5788816A (en) 1998-08-04
DE19530983A1 (en) 1997-02-27
DE19530983B4 (en) 2006-04-27
EP0761874A2 (en) 1997-03-12

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