EP1502991A1 - Device for guiding a moving fibrous web - Google Patents

Device for guiding a moving fibrous web Download PDF

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Publication number
EP1502991A1
EP1502991A1 EP04103162A EP04103162A EP1502991A1 EP 1502991 A1 EP1502991 A1 EP 1502991A1 EP 04103162 A EP04103162 A EP 04103162A EP 04103162 A EP04103162 A EP 04103162A EP 1502991 A1 EP1502991 A1 EP 1502991A1
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EP
European Patent Office
Prior art keywords
fibrous web
web
nozzle
air
width
Prior art date
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Granted
Application number
EP04103162A
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German (de)
French (fr)
Other versions
EP1502991B1 (en
Inventor
Richard Aust
Juan Paniagua
Frank Schicht
Herbert Sommer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Patent GmbH
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Voith Paper Patent GmbH
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Publication of EP1502991A1 publication Critical patent/EP1502991A1/en
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Publication of EP1502991B1 publication Critical patent/EP1502991B1/en
Not-in-force legal-status Critical Current
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F5/00—Dryer section of machines for making continuous webs of paper
    • D21F5/18—Drying webs by hot air
    • D21F5/185—Supporting webs in hot air dryers
    • D21F5/187—Supporting webs in hot air dryers by air jets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00—Registering, tensioning, smoothing or guiding webs
    • B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
    • B65H23/24—Registering, tensioning, smoothing or guiding webs longitudinally by fluid action, e.g. to retard the running web
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/36—Guiding mechanisms
    • D21F1/42—Jets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/51—Modifying a characteristic of handled material
    • B65H2301/517—Drying material

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  • Paper (AREA)
  • Drying Of Solid Materials (AREA)
  • Advancing Webs (AREA)

Abstract

In a papermaking process a wet web (1) of coated paper or carton moves over a series of transverse box-shaped beams (3) with transverse air (7) outlets (3b) forming an air cushion (6) between the web and beams. The beam group (2) forms an arched array. An air suction outlet (4) is located between adjacent beams. also claimed is a commensurate paper/carton drying assembly in which the width (BD) of each beam (3) to the width (BS) of the suction gap (4) is: 2 BD/BS 50. The jet aperture (3b) is at an angle of 30 to 60 to the centre of the beam (3). Air emerges from the jet at 80 m/s and up to 450C. The jets are of any suitable shape.

Description

Die Erfindung betrifft eine Vorrichtung gemäß dem Oberbegriff des Anspruches 1.The invention relates to a device according to the preamble of claim 1.

Eine gattungsgemäße Vorrichtung ist in der noch nicht veröffentlichten DE 102 56 512.0 (PU11425) beschrieben.A generic device is in the not yet published DE 102 56 512.0 (PU11425).

Eine Faserstoffbahn, insbesondere eine Papier- oder Kartonbahn, wird gegenwärtig aus Wirtschaftlichkeitsgründen in immer größerer Breite, die oftmals 10m und mehr betragen kann, hergestellt. Dies geschieht bei hohen Maschinengeschwindigkeiten. Außerdem wird die Faserstoffbahn, insbesondere zum Zwecke der besseren Bedruckbarkeit häufig mit Streichfarbe, Stärke oder Leim beschichtet. Dabei soll ein, über die gesamte Bahnbreite reichender gleichmäßiger Auftrag, sowie eine sichere Bahnführung möglich sein.A fibrous web, in particular a paper or board web, is becoming current for economic reasons in ever greater breadth, often 10m or more may be manufactured. This happens at high machine speeds. In addition, the fibrous web, in particular for the purpose of better Printability often coated with coating color, starch or glue. It should be one, over the entire web width reaching uniform order, as well as a safe Track guide be possible.

Diese Forderung ist insbesondere dann sehr anspruchsvoll, wenn die Bahn bei hohen Zügen gleichzeitig umgelenkt und getrocknet werden soll und ist um so schwieriger zu realisieren, je schneller die Bahn in der Maschine läuft. Außerdem spielt dabei die Qualität der Faserstoffbahn und das Auftragsmedium eine wichtige Rolle.This requirement is particularly demanding when the train at high Trains should be deflected and dried at the same time and is the more difficult to realize, the faster the web runs in the machine. It also plays the Quality of the fibrous web and the application medium an important role.

Es ist Aufgabe der Erfindung, eine geeignete Vorrichtung zum berührungslosen Führen, Ändern der Richtung und Trocknen einer laufenden Faserstoffbahn zu schaffen.It is an object of the invention to provide a suitable device for non-contact Guiding, changing direction and drying a moving fibrous web too create.

Die Aufgabe der Erfindung wird mit den kennzeichnenden Merkmalen des Anspruches 1 gelöst.The object of the invention is achieved with the characterizing features of Claim 1 solved.

Die Erfinder haben erkannt, dass es dabei vor allem auf das Verhältnis von Düsenbalkenbreite und Saugspaltbreite ankommt. The inventors have realized that this is mainly due to the ratio of Nozzle beam width and Saugspaltbreite arrives.

Mit der erfindungsgemäßen Lösung ist die Ausbildung eines ausgeprägten Druckpolsters zwischen Faserstoffbahn und erfindungsgemäßer Vorrichtung erstmalig ohne größeren Aufwand möglich. Das Druckpolster ist dabei sogar so stark ausgeprägt, dass es Gleichgewicht zu einem hohen eingestellten Bahnzug halten kann, was bisher nur , insbesondere bei hohen Lufttemperaturen, eingeschränkt möglich war.With the solution according to the invention, the formation of a pronounced Pressure pad between fibrous web and inventive device for the first time without much effort possible. The pressure pad is even so strong pronounced that it holds balance to a high set web tension can, what previously limited only, especially at high air temperatures was possible.

Die erfindungsgemäße Vorrichtung lässt sich deshalb besonders effektiv zur Trocknung der Faserstoffbahn, insbesondere zur Trocknung einer frisch aufgebrachten Beschichtung auf eine Bahnseite einsetzen, wodurch die empfindliche Auftragsschicht geschont wird.The device according to the invention can therefore be particularly effective for Drying of the fibrous web, especially for drying a fresh Apply applied coating on one side of the sheet, which makes the sensitive Application layer is spared.

Der Trocknungseffekt erfolgt durch das Blasen von erhitzter Luft. Die erhitzte Luft belädt sich durch ihren Kontakt mit der feuchten Faserstoffbahn mit Wasserdampf und wird zwischen den einzelnen Düsenbalken durch erfindungsgemäße Saugspalte abgesaugt. Damit wird eine zweidimensionale Strömungsführung erzielt, wodurch das Feuchtequerprofil der Faserstoffbahn im Gegensatz zu herkömmlichen Vorrichtungen nicht negativ beeinflusst wird.The drying effect is achieved by blowing heated air. The heated air Charges itself with water vapor through its contact with the moist fibrous web and is between the individual nozzle bars by suction gaps according to the invention aspirated. Thus, a two-dimensional flow guidance is achieved, whereby the Moisture transverse profile of the fibrous web in contrast to conventional devices is not negatively affected.

Gleichzeitig wird im Bereich des Düsenbalkens zwischen einer Düsenbalkenaußenfläche und der vorzugsweise bestrichenen Seite der Faserstoffbahn das oben beschriebene stabile Druckpolster geschaffen, auf dem die Faserstoffbahn berührungslos laufen kann, eine gewollte, definierte Richtungsänderung erfährt und wie gesagt auch getrocknet wird.At the same time in the area of the nozzle bar between a Nozzle beam outer surface and preferably swept side of Fibrous web created the stable pressure pad described above, on which the Fiber web can run without contact, a wanted, defined Direction change learns and as I said also dried.

Dies ist um so bedeutender, da die Ausbildung eines stabilen, ausgeprägten Druckpolsters bisher in der Praxis nur durch Erhöhung der ausgeblasenen Luftmenge möglich war.This is all the more important since the formation of a stable, distinct Pressure pad previously only in practice by increasing the amount of air blown was possible.

Diese erhöhten Luftmengen erfordern aber höheren Energieaufwand. Konstante Austrittsquerschnitte führen bei erhöhten Luftmengen zu einem erhöhten Turbulenzgrad, der wiederum zu Vibrationen und Bahnflattern führt.. Außerdem sind der Größe der Austrittsquerschnitte im Hinblick auf die Gleichverteilung der zugeführten Luftmenge Grenzen gesetzt. Außerdem nehmen bei hohen Luftmengen die Strömungsgeräusche über ein tolerierbares Maß hinaus zu.
Des weiteren würden größere Luftmengen größere Abmessungen der Vorrichtung und der mit ihr verbundenen Einrichtungen (wie Rohrleitungen, Ventilatoren, Brennkammern, Wärmetauscher usw.) erfordern oder der Druckverlust innerhalb der Vorrichtung wird zu groß.However, these increased air volumes require more energy. Constant outlet cross-sections lead to an increased degree of turbulence with increased air volumes, which in turn leads to vibrations and web flutter. In addition, the size of the outlet cross-sections are limited in terms of the uniform distribution of the supplied air quantity. In addition, at high air volumes, the flow noise increases beyond a tolerable level.
Furthermore, larger volumes of air would require larger dimensions of the apparatus and associated equipment (such as piping, fans, combustors, heat exchangers, etc.), or the pressure drop within the apparatus would be too great.

Diese negativen Auswirkungen werden durch die erfindungsgemäße Ausgestaltung der Vorrichtung vermieden.These negative effects are caused by the inventive design avoided the device.

Weitere vorteilhafte Ausgestaltungsmerkmale ergeben sich aus den Unteransprüchen.Further advantageous design features emerge from the Dependent claims.

Nachfolgend soll die Erfindung anhand eines Ausführungsbeispieles näher erläutert werden.The invention will be explained in more detail with reference to an embodiment become.

Es zeigtIt shows

Figur 1 : einen Teilbereich der erfindungsgemäßen Vorrichtung in Maschinenquerrichtung gesehen in schematischer Darstellung Figure 1 : a partial region of the device according to the invention seen in the cross machine direction in a schematic representation

Innerhalb einer Maschine zur Herstellung und/oder Veredelung einer Faserstoffbahn ist zur kontaktlosen Führung, Umlenkung und Trocknung der im Beispiel gewählten laufenden Kartonbahn 1 eine Vorrichtung 2 vorgesehen. Die Vorrichtung 2 entspricht in ihrer Länge dabei mindestens der Breite der über sie laufenden Kartonbahn 1.Within a machine for producing and / or refining a fibrous web is for contactless guidance, deflection and drying of the example chosen running cardboard web 1 a device 2 is provided. The device 2 corresponds in their length at least the width of the ongoing over them cardboard web. 1

Die Kartonbahn 1 wurde im gewählten Beispiel in einem vorherigen, nicht dargestellten Schritt mit einem flüssigen bis pastösen Beschichtungsmedium (z.B. The board web 1 was in the example chosen in a previous, not with a liquid to pasty coating medium (e.g.

Streichfarbe) versehen und läuft in Laufrichtung L einem nächsten (im Beispiel nicht näher bestimmten) Behandlungsschritt N zu, wodurch eine kontaktlose Führung derselben relativ schwierig zu bewerkstelligen ist.Coating color) provided and runs in the direction L a next (not in the example more specific) treatment step N, whereby a contactless guide same is relatively difficult to accomplish.

Die besagte Vorrichtung 2 besteht deshalb aus einer bogenförmigen Aneinanderreihung von mehreren kastenartigen, hohlen Düsenbalken 3 und mehreren dazwischen liegenden Saugkanälen 4, so dass eine bogenförmige, konvexe Bahnführungsfläche 5 entsteht. Je nachdem wie groß der Umschlingungs- bzw. Umlenkungswinkel α sein soll, werden entsprechend viele Düsenbalken 3 und dazwischen befindliche Saugkanäle 4 gewählt. Den Anfang und das Ende der Vorrichtung - in Querrichtung gesehen- bildet je ein Düsenbalken 3.The said device 2 therefore consists of an arcuate Stringing together of several box-like, hollow nozzle bars 3 and several intermediate suction channels 4, so that an arcuate, convex web guide surface 5 is formed. Depending on how big the looping or deflection angle α should be, according to many nozzle bars 3 and between them located suction channels 4 selected. The beginning and the end of the Device - seen in the transverse direction - each forms a nozzle bar. 3

Zur Ausbildung eines stabilen Druckpolsters 6 zwischen der Vorrichtung 2, das heißt zwischen einer Außenflächen 3a eines des Düsenbalkens 3 bzw. der Bahnführungsfläche 5 aller vorhanden Düsenbalken (siehe strichpunktierte Linie) und der Faserstoffbahn 1, steht die Breite eines Düsenbalkens 3 im bestimmten Verhältnis zur Breite eines dazwischen liegenden Saugkanals 4.To form a stable pressure pad 6 between the device 2, that is between an outer surface 3a of the nozzle bar 3 and the Web guide surface 5 of all existing nozzle bars (see dotted line) and the fibrous web 1, is the width of a nozzle bar 3 in certain Ratio to the width of an intermediate suction channel. 4

Mit dem gewähltem Breitenverhältnis wird ein optimales Verhältnis zwischen zuströmender Blasluft 7 und der mit Wasserdampf beladenen durch den Saugkanal 4 abzuführenden bzw. abzusaugenden Luft 8 pro zugeführtem Bereich der Faserstoffbahn 1 geschaffen, ohne dass die zugeführte Menge an Blasluft 7 erhöht werden muss. Außerdem sind dadurch hohe Bahnzüge beherrschbar.With the chosen width ratio is an optimal ratio between inflowing blown air 7 and the steam-laden through the suction channel. 4 discharged or sucked air 8 per supplied area of Fiber web 1 created without the supplied amount of blowing air 7 increases must become. In addition, high railway trains are manageable.

Es ist vorgesehen, dass die Breite BD eines Düsenbalkens 3, zwei bis fünfzig mal größer, vorzugsweise drei bis zehn mal größer als die Breite BS eines in das Innere der Vorrichtung 2 gerichteten Saugkanals 4 ist.It is provided that the width B D of a nozzle bar 3, two to fifty times greater, preferably three to ten times greater than the width B S of a directed into the interior of the device 2 suction channel 4 is.

Im Beispiel ist die dreifache Größe des Düsenbalkens 3 gegenüber dem Saugkanal 4 gewählt. In the example, the threefold size of the nozzle bar 3 is opposite the suction channel 4 selected.

Ein solcher Düsenbalken 3 weist an seinen beiden oberen Außenrändern jeweils eine über seine gesamte Länge reichende Reihe an Düsenöffnungen 3b für die Zuführung der Blasluft 7 auf.Such a nozzle bar 3 has at its two upper outer edges one each over its entire length reaching row of nozzle openings 3b for the supply the blowing air 7 on.

Die ansonsten ebene, der Faserstoffbahn 1 zugewandte, Außenfläche 3a des Düsenbalkens 3 ist dazu an diesen Rändern in einem Winkel ϕ von 10° bis 80°, vorzugsweise 30° bis 60° nach dem Inneren hin bzw. zur Mitte des Düsenbalkens 3 zeigend abgewinkelt, wodurch auch die Düsenöffnungen 3b in diesem Winkel geneigt sind. Die ausströmende Blasluft 7 erzeugt dadurch besonders effektiv das Druckpolster 6.The otherwise flat, the fibrous web 1 facing the outer surface 3a of the Nozzle bar 3 is at these edges at an angle φ of 10 ° to 80 °, preferably 30 ° to 60 ° to the interior towards or towards the center of the nozzle bar 3 pointing angled, whereby the nozzle openings 3b inclined at this angle are. The outflowing blast air 7 generates this particularly effective Pressure pad 6.

Die Blasluft 7 hat eine Austrittsgeschwindigkeit von 30 bis 80 m/s und weist eine Temperatur von bis zu 450 °C auf, wodurch die Faserstoffbahn 1 bzw. die frisch aufgetragene Mediumsschicht kontaktlos getrocknet wird.The blowing air 7 has an exit velocity of 30 to 80 m / s and has a Temperature of up to 450 ° C, whereby the fibrous web 1 and the fresh applied medium layer is dried contactlessly.

Die Düsenöffnungen 3b sind dabei in Form von kreisförmig, elliptisch oder polygonartig ausgebildeten Lochungen oder auch in Form von langgestreckten Schlitzen in Frage. Kreisförmige Öffnungen sind allerdings einfacher herstellbar und besonders günstig hinsichtlich der Wärmeübertragungseigenschaften..The nozzle openings 3b are in the form of circular, elliptical or polygonal perforations or in the form of elongated Slots in question. However, circular openings are easier to produce and particularly favorable in terms of heat transfer properties ..

Claims (6)

Vorrichtung zur Führung und Trocknung einer laufenden Faserstoffbahn in Maschinen zur Herstellung und/oder Veredelung der Faserstoffbahn, insbesondere einer gestrichenen Papier- oder Kartonbahn, mit wenigstens einem Blasluft (7) - beaufschlagten, kastenartig aufgebauten Düsenbalken (3), welcher eine Reihe von Düsenöffnungen (3b) aufweist, aus denen die Blasluft (7) in Richtung der Faserstoffbahn (1) austritt und dabei ein Druckpolster (6) ausbildet,
dadurch gekennzeichnet, dass
die Vorrichtung (2) eine bogenförmige Bahnführungsfläche (5) bildet, wobei neben dem wenigstens einen Düsenbalken (3) ein Saugspalt (4) vorhanden ist und wobei die Breite (BD) des Düsenbalkens (3) zur Breite (BS) des Saugspaltes (4) in folgendem Verhältnis steht: 2 < BD/BS < 50.Device for guiding and drying a moving fibrous web in machines for producing and / or refining the fibrous web, in particular a coated paper or board web, with at least one blown air (7) - acted upon, box-like nozzle bar (3), which a series of nozzle openings ( 3b), from which the blowing air (7) emerges in the direction of the fibrous web (1) and thereby forms a pressure pad (6),
characterized in that
the device (2) forms an arcuate web guide surface (5), wherein a suction gap (4) is present next to the at least one nozzle bar (3) and wherein the width (B D ) of the nozzle bar (3) is equal to the width (B S ) of the suction gap (4) in the following relationship: 2 <B D / B S <50. Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet, dass
als Verhältnis der Breiten zwischen Düsenbalken (3) und Saugspalt (4) 3 < BD/BS < 10 gewählt ist.Device according to claim 1,
characterized in that
is selected as the ratio of the widths between the nozzle bar (3) and suction gap (4) 3 <B D / B S <10. Vorrichtung nach Anspruch 1 oder 2,
dadurch gekennzeichnet, dass
die Düsenöffnungen (3b) im Düsenbalken (3) in einem Winkel ϕ zwischen 10° und 80 °, insbesondere 30° und 60° zu Mitte des Düsenbalkens (3) hin geneigt sind.Apparatus according to claim 1 or 2,
characterized in that
the nozzle openings (3b) in the nozzle bar (3) are inclined at an angle φ between 10 ° and 80 °, in particular 30 ° and 60 °, towards the center of the nozzle bar (3). Vorrichtung nach Anspruch 1 bis 3,
dadurch gekennzeichnet, dass
die Austrittsgeschwindigkeit der Blasluft (7) aus den Düsenöffnungen (3b) 30 bis 80 m/s beträgt. Apparatus according to claim 1 to 3,
characterized in that
the exit velocity of the blown air (7) from the nozzle openings (3b) is 30 to 80 m / s. Vorrichtung nach Anspruch 1 bis 4,
dadurch gekennzeichnet, dass
zur kontaktlosen Trocknung der Faserstoffbahn (1) die Blaslufttemperatur auf bis zu 450°C einstellbar ist.Device according to claims 1 to 4,
characterized in that
for contactless drying of the fibrous web (1), the blown air temperature can be set up to 450 ° C. Vorrichtung nach Anspruch 1 bis 5,
dadurch gekennzeichnet, dass
die Düsenöffnungen (3b) kreisförmig, elliptisch, polygonartig oder schlitzförmig ausbildbar sind.Device according to claims 1 to 5,
characterized in that
the nozzle openings (3b) are circular, elliptical, polygonal or slot-shaped can be formed.
EP04103162A 2003-07-31 2004-07-05 Device for guiding and drying a moving fibrous web Not-in-force EP1502991B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10335581A DE10335581A1 (en) 2003-07-31 2003-07-31 Device for guiding and drying a running fibrous web
DE10335581 2003-07-31

Publications (2)

Publication Number Publication Date
EP1502991A1 true EP1502991A1 (en) 2005-02-02
EP1502991B1 EP1502991B1 (en) 2009-09-30

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Application Number Title Priority Date Filing Date
EP04103162A Not-in-force EP1502991B1 (en) 2003-07-31 2004-07-05 Device for guiding and drying a moving fibrous web

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EP (1) EP1502991B1 (en)
AT (1) ATE444395T1 (en)
DE (2) DE10335581A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1712501A2 (en) * 2005-04-14 2006-10-18 Voith Patent GmbH Web guiding element

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4021931A (en) * 1975-11-21 1977-05-10 Midland-Ross Corporation Air circulating apparatus for floating material in web form
DE3841909A1 (en) * 1988-04-02 1989-10-19 Hilmar Vits METHOD AND DEVICE FOR THE FLOATING GUIDANCE OF ARCHED OR RAIL-SHAPED MATERIAL OVER A CONVEYOR LINE, ESPECIALLY A CURVED CONVEYOR LINE
US5016363A (en) * 1987-05-09 1991-05-21 Kurt Krieger Device for float-conveying of webs of material
EP0561256A1 (en) * 1992-03-19 1993-09-22 Valmet Paper Machinery Inc. Method in contact-free air-drying of a material web as well as a nozzle-blow-box and a pulp dryer that make use of the method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT316298B (en) * 1972-06-02 1974-07-10 Andritz Ag Maschf Drying system for the treatment of material webs
FI77708C (en) * 1987-09-28 1989-04-10 Valmet Paper Machinery Inc ARRANGEMANG AV OEVERTRYCKSMUNSTYCKEN AVSETT FOER BEHANDLING AV BANOR.
DE3904774C1 (en) * 1989-02-17 1990-05-17 Hilmar 5653 Leichlingen De Vits
DE4110875A1 (en) * 1991-04-04 1992-10-08 Voith Gmbh J M DRY LOT
FI991497A0 (en) * 1999-06-30 1999-06-30 Valmet Corp Blow nozzle device for fan dryer with airborne web

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4021931A (en) * 1975-11-21 1977-05-10 Midland-Ross Corporation Air circulating apparatus for floating material in web form
US5016363A (en) * 1987-05-09 1991-05-21 Kurt Krieger Device for float-conveying of webs of material
DE3841909A1 (en) * 1988-04-02 1989-10-19 Hilmar Vits METHOD AND DEVICE FOR THE FLOATING GUIDANCE OF ARCHED OR RAIL-SHAPED MATERIAL OVER A CONVEYOR LINE, ESPECIALLY A CURVED CONVEYOR LINE
EP0561256A1 (en) * 1992-03-19 1993-09-22 Valmet Paper Machinery Inc. Method in contact-free air-drying of a material web as well as a nozzle-blow-box and a pulp dryer that make use of the method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1712501A2 (en) * 2005-04-14 2006-10-18 Voith Patent GmbH Web guiding element
EP1712501A3 (en) * 2005-04-14 2007-10-10 Voith Patent GmbH Web guiding element

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Publication number Publication date
DE502004010146D1 (en) 2009-11-12
EP1502991B1 (en) 2009-09-30
DE10335581A1 (en) 2005-02-24
ATE444395T1 (en) 2009-10-15

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