EP1385635B1 - Device for suctioning an air boundary layer from a running web of material and apparatus for coating a running web using said suction device - Google Patents

Device for suctioning an air boundary layer from a running web of material and apparatus for coating a running web using said suction device Download PDF

Info

Publication number
EP1385635B1
EP1385635B1 EP02727525A EP02727525A EP1385635B1 EP 1385635 B1 EP1385635 B1 EP 1385635B1 EP 02727525 A EP02727525 A EP 02727525A EP 02727525 A EP02727525 A EP 02727525A EP 1385635 B1 EP1385635 B1 EP 1385635B1
Authority
EP
European Patent Office
Prior art keywords
web
seal
outlet
suction box
suction
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
EP02727525A
Other languages
German (de)
French (fr)
Other versions
EP1385635A1 (en
Inventor
Rolf Metzger
Luca Frediani
Bruno Holtmann
Hans Hardegger
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.)
Andritz Kuesters GmbH
Original Assignee
Andritz Hydro AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Andritz Hydro AG filed Critical Andritz Hydro AG
Publication of EP1385635A1 publication Critical patent/EP1385635A1/en
Application granted granted Critical
Publication of EP1385635B1 publication Critical patent/EP1385635B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/005—Curtain coaters
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/46—Pouring or allowing the fluid to flow in a continuous stream on to the surface, the entire stream being carried away by the paper
    • D21H23/48—Curtain coaters
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C1/00—Photosensitive materials
    • G03C1/74—Applying photosensitive compositions to the base; Drying processes therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S118/00—Coating apparatus
    • Y10S118/04—Curtain coater

Definitions

  • the invention relates to a device for extracting an air boundary layer of a running, deflected by a roller material web and a device for coating a moving material web with such a suction device.
  • curtain coaters For coating of running webs such as paper or board webs, plastic or metal foils, so-called curtain coaters are known in which the coating material (adhesive dispersions, pigment coating, etc.) is applied from a slot in a free-falling curtain on the web.
  • the coating material adheresive dispersions, pigment coating, etc.
  • the air boundary layer adhering to the web causes problems, especially at high web speeds of more than 400 mlmin.
  • the air boundary layer adhering to the web causes irregular fluctuations of the curtain and leads to trapped air which leads to unevenness in the coating thickness.
  • a curtain coater for the production of photographic materials in which in front of the slot nozzle, a shield-shaped element ("air shield”) is arranged, which serves to remove the air boundary layer.
  • the element is arranged in the region of a deflection roller for the web and extends arcuately curved over a certain angular range of the guide roller.
  • the element is designed so that in the inlet area and the outlet area zones are determined in which the air resistance is greater than in a zone between the two areas. In the zone between the areas with greater air resistance, there is a chamber connected to a suction pump to reduce the pressure is.
  • the distance between the sealing elements at the inlet and outlet side and the guide roller is between 0.5 mm and 2 mm.
  • the distance between the outlet end of the shield-shaped element and the curtain is between 5 mm and 30 mm.
  • the invention has for its object to provide a device which makes it possible to reduce the air boundary layer of a wide (3 m and more) web at high web speeds (1000 m / min and more) so that a subsequently arranged curtain coater evenly apply the coating material.
  • the coating device shown in the figures is used to apply a dispersion adhesive (eg an acrylate) in aqueous solution to a siliconized paper web 1. Because of its advantageous properties, the device can also be used for applying other dispersions on paper, plastic films or use thin strips or to coat paper or board webs with coating color.
  • a dispersion adhesive eg an acrylate
  • the coating apparatus includes a slot nozzle 2 which is suspended above the run of the web 1 in a rack.
  • the slit nozzle 2 is connected to a supply for coating material and has on its underside a slot-shaped opening from which the coating material emerges and forms a free-falling curtain 3, which falls on the web surface.
  • the width of the slot nozzle 2 is greater than the width of the web 1 to be coated.
  • the web 1 is deflected by a deflection roller 4 which extends in its axial length over the entire working width of the coating device, i.e. the maximum width of a web 1 to be coated, extends.
  • edge troughs 5 are arranged below the slot nozzle, which limit the curtain 3 to the desired coating width.
  • the edge troughs are each attached to the frame of the nozzle 2, so that they are moved in a displacement of the nozzle 2 in or against the running direction.
  • the coating material separated off at the edges of the curtain is collected and removed against the running direction of the web in a drip pan 6.
  • the drip pan 6 is arranged immediately in front of the deflection roller 4.
  • the slot nozzle 2 is in its working position above the guide roller 4 ( FIG. 1 ) or just behind it ( FIG. 3 ) emotional.
  • the embodiment according to FIG. 1 serves to apply a coating with a width less than the web width. On the coated web 1 so remain coating-free edges.
  • the web 1 is coated over its entire width.
  • the curtain 3 is wider than the web 1.
  • the slit nozzle 2 is located in its working position at a distance behind the apex line of the guide roller 4, so that below the curtain 3, a trough 7 can be arranged, from which the laterally collected next to the web edges coating material becomes.
  • the web 1 is guided horizontally in the region below the slot nozzle 2 and then deflected downwards by a second deflection roller 8.
  • a suction device is arranged at a small distance in the web running direction in front of the slot 2, which in the Figures 2 and 4 is shown enlarged.
  • a suction box 8 is arranged, which is the guide roller 4 - ie to the web 1 - open and connected via at least one opening into the rear wall suction line 9 to a suction fan.
  • the suction box 8 extends in its width over the entire axial length of the guide roller 4. At its inlet side, it has an inlet seal 10 and at its outlet side an outlet seal 11 which extend over the axial length of the guide roller 4 and with the web. 1 form a gap 12, 13. At least the end of the inlet seal 10 and the beginning of the outlet seal 11 are located in the deflection of the web 1 on the guide roller 4.
  • the suction box 8 includes a frontal seal 14, which is parallel to the outside of the front side at a small distance from this extends.
  • the sealing elements 14 extend with a width of at least 10 mm, preferably more than 15 mm, measured radially to the deflecting roller 4 into the frontal region of the deflecting roller 4.
  • the outlet seal 11 is arranged and designed so that an outlet gap 13 forms with the web 1, the height and length measured in the web running direction over the entire width of the suction box 8, ie over the entire axial length of the guide roller 4, is substantially constant.
  • the length of the outlet gap 13 is more than 10 mm, preferably more than 30 mm, in particular 50 mm - 70 mm.
  • the height of the outlet gap 13 is chosen as a function of the web speed so that the value of the product web speed (in m / min) x gap height (in mm) is less than 1500. At a web speed of 1000 m / min, the gap height is thus less than 1.5 mm.
  • the measured over the roll circumference distance between the end of the inlet seal 10 and the beginning of the outlet seal 11 is 50 mm - 500 mm.
  • the air boundary layer is sucked by the negative pressure in the suction box 8 of the web 1. It has been found that the suction is improved when the inlet seal 10 and the outlet seal 11 are designed so that they each have a sharp edge at its inlet and outlet ends.
  • At least the outlet seal 11 is therefore at its inlet and designed their sharp-edged outlet, preferably, the inlet seal 10 at least at its outlet end on a correspondingly sharp edge.
  • wall 15 is arranged, which extends across the entire width of the suction box 8.
  • the wall 15 is formed by a perforated plate which separates the rear region of the suction chamber 8 with the suction line 9 from the front region, which is open to the web 1 out. The wall 15 additionally stabilizes the construction of the suction box 8.
  • a corona charging electrode 16 is arranged in the suction box 8, which is connected to a high voltage source.
  • a corona charging electrode and its use for peeling off a gaseous laminar boundary layer is described in detail in US Pat EP 0837824 B1 described.
  • the charging electrode 8 extends across the width of the suction box 8 and has a series of parallel aligned tips 17 which are directed towards the web 1.
  • the applied high voltage causes 16 emerge from the tips 17 of the charging electrode electrons or positrons, which generate turbulence in the air boundary layer and thus stir it up.
  • the tips 17 extend as close as possible to the web 1, wherein the distance to the web 1 0.1 mm - 10 mm, preferably 1 mm - 5 mm. The distance across the web 1 between two tips 17 is about 5 mm.
  • the coating device shown in the suction box 8 is in each case arranged so that the distance from the end of the outlet seal 11 to the exiting the slot 2 curtain 3 10 mm - 200 mm, preferably 20 mm - 70 mm. At this distance, on the one hand ensures that no new disturbing air boundary layer builds up on the way the train to the curtain 3, on the other disturbances of the curtain 3 are avoided by sucking air into the outlet gap 13.
  • Suction box 8 shown formed extended at its end. The end of the suction box 8 with the outlet seal 11 extends over the apex line of the guide roller 4 of time.
  • the upper boundary of the suction box 8 is designed so that it protrudes only slightly over the circumference of the guide roller 4 upwards. This makes it possible to arrange the edge troughs 5 above the suction box 8 immediately above the web run so that they run slightly downwards against the web running direction, so that the collected coating material runs into the trough 6.
  • the suction box 8 is pivoted away from the deflection roller 4, so that a new web 1 can be introduced into the coating apparatus. In addition, its open to the web 1 front is accessible for maintenance.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Coating Apparatus (AREA)
  • Paper (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Description

Technisches GebietTechnical area

Die Erfindung betrifft eine Vorrichtung zum Absaugen einer Luftgrenzschicht von einer laufenden, von einer Walze umgelenkten Materialbahn sowie einer Vorrichtung zum Beschichten einer laufenden Materialbahn mit einer derartigen Absaugevorrichtung.The invention relates to a device for extracting an air boundary layer of a running, deflected by a roller material web and a device for coating a moving material web with such a suction device.

Stand der TechnikState of the art

Zum Beschichten von laufenden Materialbahnen wie Papier- oder Kartonbahnen, Kunststoff- oder Metallfolien sind sogenannte Curtain-Coater bekannt, bei denen das Beschichtungsmaterial (Klebstoffdispersionen, Pigmentstreichfarbe etc.) aus einer Schlitzdüse in einem freifallenden Vorhang auf die Materialbahn aufgetragen wird. Um mit einem Curtain-Coater sehr gleichmäßig zu beschichten, ist es erforderlich, daß der aus der Schlitzdüse fallende Vorhang stabil, ohne Schwankungen und ohne Lufteinschlüsse auf die Bahn aufgelegt wird. Dabei bereitet die an der Bahn anhaftende Luftgrenzschicht insbesondere bei hohen Bahngeschwindigkeiten von mehr als 400 mlmin Probleme. Die an der Bahn anhaftende Luftgrenzschicht löst unregelmäßige Schwankungen des Vorhangs aus und führt zu Lufteinschlüssen, die zu Ungleichmäßigkeiten in der Beschichtungsdicke führen.For coating of running webs such as paper or board webs, plastic or metal foils, so-called curtain coaters are known in which the coating material (adhesive dispersions, pigment coating, etc.) is applied from a slot in a free-falling curtain on the web. In order to coat very evenly with a curtain coater, it is necessary that the curtain falling from the slot nozzle be placed on the web stably, without fluctuations and without air inclusions. The air boundary layer adhering to the web causes problems, especially at high web speeds of more than 400 mlmin. The air boundary layer adhering to the web causes irregular fluctuations of the curtain and leads to trapped air which leads to unevenness in the coating thickness.

Aus der EP 0489978-A1 ist ein Curtain-Coater für die Herstellung von fotografischen Materialien bekannt, bei dem vor der Schlitzdüse ein schildförmiges Element ("air shield") angeordnet ist, das zur Entfernung der Luftgrenzschicht dient. Das Element ist im Bereich einer Umlenkwalze für die Bahn angeordnet und erstreckt sich kreisbogenförmig gekrümmt über einen bestimmten Winkelbereich der Umlenkwalze. Das Element ist so gestaltet, daß im Einlaufbereich und im Auslaufbereich Zonen bestimmt werden, in denen der Luftwiderstand größer ist als in einer Zone zwischen den beiden Bereichen. In der Zone zwischen den Bereichen mit größerem Luftwiderstand befindet sich eine Kammer, die zur Verminderung des Drucks an eine Saugpumpe angeschlossen ist. Der Abstand zwischen den dichtend wirkenden Elementen an der Einlauf- und Auslaufseite und der Umlenkwalze beträgt zwischen 0,5 mm und 2 mm. Der Abstand zwischen den auslaufseitigen Ende des schildförmigen Elements und dem Vorhang beträgt zwischen 5 mm und 30 mm.From the EP 0489978-A1 is a curtain coater for the production of photographic materials is known in which in front of the slot nozzle, a shield-shaped element ("air shield") is arranged, which serves to remove the air boundary layer. The element is arranged in the region of a deflection roller for the web and extends arcuately curved over a certain angular range of the guide roller. The element is designed so that in the inlet area and the outlet area zones are determined in which the air resistance is greater than in a zone between the two areas. In the zone between the areas with greater air resistance, there is a chamber connected to a suction pump to reduce the pressure is. The distance between the sealing elements at the inlet and outlet side and the guide roller is between 0.5 mm and 2 mm. The distance between the outlet end of the shield-shaped element and the curtain is between 5 mm and 30 mm.

Darstellung der ErfindungPresentation of the invention

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zu schaffen, die es ermöglicht, die Luftgrenzschicht von einer breiten (3 m und mehr) Bahn bei hohen Bahngeschwindigkeiten (1000 m/min und mehr) so zu vermindern, daß ein nachfolgend angeordneter Curtain-Coater das Beschichtungsmaterial gleichmäßig aufträgt.The invention has for its object to provide a device which makes it possible to reduce the air boundary layer of a wide (3 m and more) web at high web speeds (1000 m / min and more) so that a subsequently arranged curtain coater evenly apply the coating material.

Diese Aufgabe wird dadurch gelöst, daß im Bereich einer die Materialbahn umlenkenden Walze ein Saugkasten mit folgenden Merkmalen angeordnet ist:

  • Der sich in seiner Breite über die axiale Länge der Umlenkwalze erstreckende Saugkasten ist zur Umlenkwalze hin offen und an ein Sauggebläse angeschlossen,
  • er weist eine einlaufseitige und eine auslaufseitige Dichtung auf, die jeweils einen Spalt mit der Bahn bilden und sich über die axiale Länge der Umlenkwalze erstrekken, wobei sich zumindest das Ende der einlaufseitigen Dichtung und der Anfang der auslaufseitigen Dichtung im Umlenkungsbereich der Bahn auf der Umlenk-
  • walze befinden,
  • an jeder Stirnseite der Umlenkwalze enthält der Saugkasten eine stirnseitige Dichtung, die sich außen neben der Stirnseite parallel mit geringem Abstand von dieser erstreckt,
  • die auslaufseitige Dichtung bildet mit der Bahn einen Auslaufspalt, dessen Höhe und in Bahnlaufrichtung gemessene Länge über die gesamte Breite des Saugkastens im wesentlichen konstant ist, wobei die Länge mehr als 10 mm, vorzugsweise mehr als 30 mm, insbesondere 50 mm - 70 mm, beträgt und die Spalthöhe in Abhängigkeit von der Bahngeschwindigkeit so gewählt ist, daß der Wert des Produkts Bahngeschwindigkeit (in m/min) x Spalthöhe (in mm) kleiner als 1500 ist.
  • der über den Walzenumfang gemessene Abstand zwischen dem Ende der Einlaufdichtung (10) und dem Anfang der Auslaufdichtung (11) mehr als 10 mm, vorzugsweise 50 mm-500 mm, beträgt.
This object is achieved in that a suction box with the following features is arranged in the region of a roller deflecting the material web:
  • The suction box extending in its width over the axial length of the guide roller is open towards the guide roller and connected to a suction fan,
  • it has an inlet-side and an outlet-side seal, each forming a gap with the web and extending over the axial length of the guide roller, wherein at least the end of the inlet-side seal and the beginning of the outlet-side seal in the deflection region of the web on the deflection
  • roller,
  • on each end face of the deflecting roller, the suction box contains an end-side seal, which extends parallel to the outside of the end face at a small distance therefrom,
  • the outlet-side seal forms with the web an outlet gap whose height and length measured in the web running direction over the entire width of the suction box is substantially constant, the length is more than 10 mm, preferably more than 30 mm, in particular 50 mm - 70 mm and the gap height is selected as a function of the web speed such that the value of the product web speed (in m / min) x gap height (in mm) is less than 1500.
  • the distance measured between the end of the inlet seal (10) and the beginning of the outlet seal (11) measured over the roll circumference is more than 10 mm, preferably 50 mm-500 mm.

Nach der Erfindung wird kein sogenannter "air shield", sondern ein Saugkasten eingesetzt, um die Luftgrenzschicht abzusaugen. Dabei hat sich gezeigt, daß für die Absaugwirkung die Gestaltung der auslaufseitigen Dichtung von entscheidender Bedeutung ist. Diese wird in Abhängigkeit von der Bahngeschwindigkeit so angeordnet und gestaltet, daß die Luftgrenzschicht auf der Bahn und auf den Rändern der Umlenkwalze unmittelbar hinter der Dichtung sehr weitgehend verringert ist. Der Vorhang aus Beschichtungsmaterial eines in diesem Bereich angeordneten Curtain-Coaters wird somit nicht mehr störend beeinträchtigt.According to the invention, no so-called "air shield", but a suction box is used to suck the air boundary layer. It has been shown that the design of the outlet-side seal is of crucial importance for the suction effect. This is arranged and designed in dependence on the web speed so that the air boundary layer on the web and on the edges of the deflecting roller immediately after the seal is very largely reduced. The curtain of coating material of a arranged in this area curtain coater is thus no longer disturbing impaired.

Die Unteransprüche enthalten bevorzugte, da besonders vorteilhafte Ausgestaltungen der Erfindung.The subclaims contain preferred, as particularly advantageous embodiments of the invention.

Kurze Beschreibung der ZeichnungShort description of the drawing

Nachfolgend wird die Erfindung anhand von Ausführungsbeispielen näher erläutert, die in der Zeichnung grob schematisch dargestellt sind.

Figur 1
zeigt die Seitenansicht eines Curtain-Coaters, bei dem die Schlitzdüse so angeordnet ist, daß der Vorhang entlang der Scheitellinie einer die Bahn abstützenden Umlenkwalze auf die Bahn fällt.
Figur 2
zeigt in vergrößerter Darstellung die Vorrichtung zum Absaugen der Luftgrenzschicht.
Figur 3
zeigt einen Curtain-Coater, bei dem der Vorhang aus Beschichtungsmaterial hinter der Umlenkwalze auf die Bahn fällt.
Figur 4
zeigt die Absaugevorrichtung des Curtain-Coaters nach Figur 3 in vergrößerter Darstellung.
The invention will be explained in more detail by means of exemplary embodiments, which are shown roughly schematically in the drawing.
FIG. 1
shows the side view of a curtain coater, wherein the slot nozzle is arranged so that the curtain along the apex line of a web supporting the deflection roller falls on the web.
FIG. 2
shows an enlarged view of the device for extracting the air boundary layer.
FIG. 3
shows a curtain coater in which the curtain of coating material falls behind the guide roller on the web.
FIG. 4
shows the suction device of the curtain coater after FIG. 3 in an enlarged view.

Wege zur Ausführung der ErfindungWays to carry out the invention

Die in den Figuren dargestellte Beschichtungsvorrichtung dient zum Auftragen eines Dispersionshaftklebstoffes (z. B. eines Acrylats) in wässriger Lösung auf eine silikonisierte Papierbahn 1. Aufgrund ihrer vorteilhaften Eigenschaften läßt sich die Vorrichtung auch zum Auftragen anderer Dispersionen auf Papier, Kunststoffolien oder dünne Bänder oder zum Beschichten von Papier- oder Kartonbahnen mit Streichfarbe einsetzen.The coating device shown in the figures is used to apply a dispersion adhesive (eg an acrylate) in aqueous solution to a siliconized paper web 1. Because of its advantageous properties, the device can also be used for applying other dispersions on paper, plastic films or use thin strips or to coat paper or board webs with coating color.

Die Beschichtungsvorrichtung enthält eine Schlitzdüse 2, die oberhalb des Laufs der Bahn 1 in einem Gestell aufgehängt ist. Die Schlitzdüse 2 ist an eine Zufuhr für Beschichtungsmaterial angeschlossen und weist an ihrer Unterseite eine schlitzförmige Öffnung auf, aus der das Beschichtungsmaterial austritt und einen freifallenden Vorhang 3 bildet, der auf die Bahnoberfläche fällt. Die Breite der Schlitzdüse 2 ist größer als die Breite der zu beschichtenden Bahn 1. Vor der Schlitzdüse 2 wird die Bahn 1 von einer Umlenkwalze 4 umgelenkt, die sich in ihrer axialen Länge über die gesamte Arbeitsbreite der Beschichtungsvorrichtung, i.e. die maximale Breite einer zu beschichtenden Bahn 1, erstreckt.The coating apparatus includes a slot nozzle 2 which is suspended above the run of the web 1 in a rack. The slit nozzle 2 is connected to a supply for coating material and has on its underside a slot-shaped opening from which the coating material emerges and forms a free-falling curtain 3, which falls on the web surface. The width of the slot nozzle 2 is greater than the width of the web 1 to be coated. Before the slot die 2, the web 1 is deflected by a deflection roller 4 which extends in its axial length over the entire working width of the coating device, i.e. the maximum width of a web 1 to be coated, extends.

An beiden Längsseiten der Beschichtungsvorrichtung sind unterhalb der Schlitzdüse 2 Randrinnen 5 angeordnet, die den Vorhang 3 auf die gewünschte Beschichtungsbreite begrenzen. Die Randrinnen sind jeweils am Gestell der Düse 2 befestigt, so daß sie bei einer Verschiebung der Düse 2 in oder gegen Bahnlaufrichtung mitbewegt werden. In den Randrinnen 5 wird das an den Vorhangrändern abgetrennte Beschichtungsmaterial aufgefangen und gegen Bahnlaufrichtung in eine Auffangwanne 6 abgeführt. Die Auffangwanne 6 ist unmittelbar vor der Umlenkwalze 4 angeordnet. Beim Start des Beschichtungsvorganges wird die Schlitzdüse 2 mit den an ihr befestigten Elementen in den Bereich oberhalb der Auffangwanne 6 bewegt. Dort wird zunächst ein stabiler Vorhang 3 erzeugt, der in die Auffangwanne 6 fällt. Anschließend wird die Schlitzdüse 2 in ihre Arbeitsposition oberhalb der Umlenkwalze 4 (Figur 1) oder kurz dahinter (Figur 3) bewegt.
Die Ausführungsform nach Figur 1 dient dazu, eine Beschichtung mit einer Breite geringer als die Bahnbreite aufzutragen. Auf der beschichteten Bahn 1 bleiben so beschichtungsfreie Ränder. Bei der Ausführungsform nach Figur 3 wird die Bahn 1 über ihre gesamte Breite beschichtet. Der Vorhang 3 ist dazu breiter als die Bahn 1. Die Schlitzdüse 2 befindet sich in ihrer Arbeitsposition mit Abstand hinter der Scheitellinie der Umlenkwalze 4, damit unterhalb des Vorhangs 3 eine Wanne 7 angeordnet werden kann, von der das seitlich neben den Bahnrändern herabfallende Beschichtungsmaterial aufgefangen wird. Die Bahn 1 wird in dem Bereich unterhalb der Schlitzdüse 2 waagerecht geführt und anschließend von einer zweiten Umlenkwalze 8 nach unten abgelenkt.On both longitudinal sides of the coating device 2 edge troughs 5 are arranged below the slot nozzle, which limit the curtain 3 to the desired coating width. The edge troughs are each attached to the frame of the nozzle 2, so that they are moved in a displacement of the nozzle 2 in or against the running direction. In the edge troughs 5, the coating material separated off at the edges of the curtain is collected and removed against the running direction of the web in a drip pan 6. The drip pan 6 is arranged immediately in front of the deflection roller 4. When starting the coating process, the slot nozzle 2 is moved with the elements attached to it in the area above the sump 6. There, a stable curtain 3 is first generated, which falls into the drip pan 6. Subsequently, the slot nozzle 2 is in its working position above the guide roller 4 ( FIG. 1 ) or just behind it ( FIG. 3 ) emotional.
The embodiment according to FIG. 1 serves to apply a coating with a width less than the web width. On the coated web 1 so remain coating-free edges. In the embodiment according to FIG. 3 the web 1 is coated over its entire width. The curtain 3 is wider than the web 1. The slit nozzle 2 is located in its working position at a distance behind the apex line of the guide roller 4, so that below the curtain 3, a trough 7 can be arranged, from which the laterally collected next to the web edges coating material becomes. The web 1 is guided horizontally in the region below the slot nozzle 2 and then deflected downwards by a second deflection roller 8.

Zum Absaugen der Luftgrenzschicht von der Bahn 1 und den Rändern der Umlenkwalze 4 ist mit geringem Abstand in Bahnlaufrichtung vor der Schlitzdüse 2 eine Absaugevorrichtung angeordnet, die in den Figuren 2 und 4 vergrößert dargestellt ist.For sucking off the air boundary layer of the web 1 and the edges of the guide roller 4, a suction device is arranged at a small distance in the web running direction in front of the slot 2, which in the Figures 2 and 4 is shown enlarged.

Im Umlenkungsbereich der Umlenkwalze 4 ist ein Saugkasten 8 angeordnet, der zur Umlenkwalze 4 - also zur Bahn 1 - hin offen ist und über mindestens eine in die Rückwand mündende Saugleitung 9 an ein Sauggebläse angeschlossen ist. Der Saugkasten 8 erstreckt sich in seiner Breite über die gesamte axiale Länge der Umlenkwalze 4. An seiner Einlaufseite weist er eine Einlaufdichtung 10 und an seiner Auslaufseite eine Auslaufdichtung 11 auf, die sich jeweils über die axiale Länge der Umlenkwalze 4 erstrecken und mit der Bahn 1 einen Spalt 12, 13 bilden. Zumindest das Ende der Einlaufdichtung 10 und der Anfang der Auslaufdichtung 11 befinden sich im Umlenkungsbereich der Bahn 1 auf der Umlenkwalze 4. An jeder Stirnseite der Umlenkwalze 4 enthält der Saugkasten 8 eine stirnseitige Dichtung 14, die sich außen neben der Stirnseite parallel mit geringem Abstand von dieser erstreckt. Für eine ausreichende Abdichtung an den Stirnseiten erstrecken sich die Dichtelemente 14 mit einer radial zur Umlenkwalze 4 gemessenen Breite von mindestens 10 mm, vorzugsweise mehr als 15 mm, in den stirnseitigen Bereich der Umlenkwalze 4 hinein.In the deflection of the guide roller 4, a suction box 8 is arranged, which is the guide roller 4 - ie to the web 1 - open and connected via at least one opening into the rear wall suction line 9 to a suction fan. The suction box 8 extends in its width over the entire axial length of the guide roller 4. At its inlet side, it has an inlet seal 10 and at its outlet side an outlet seal 11 which extend over the axial length of the guide roller 4 and with the web. 1 form a gap 12, 13. At least the end of the inlet seal 10 and the beginning of the outlet seal 11 are located in the deflection of the web 1 on the guide roller 4. At each end of the guide roller 4, the suction box 8 includes a frontal seal 14, which is parallel to the outside of the front side at a small distance from this extends. For adequate sealing at the end faces, the sealing elements 14 extend with a width of at least 10 mm, preferably more than 15 mm, measured radially to the deflecting roller 4 into the frontal region of the deflecting roller 4.

Die Auslaufdichtung 11 ist so angeordnet und gestaltet, daß sich ein Auslaufspalt 13 mit der Bahn 1 bildet, dessen Höhe und in Bahnlaufrichtung gemessene Länge über die gesamte Breite des Saugkastens 8, also über die gesamte axiale Länge der Umlenkwalze 4, im wesentlichen konstant ist. Die Länge des Auslaufspalts 13 beträgt mehr als 10 mm, vorzugsweise mehr als 30 mm, insbesondere 50 mm - 70 mm. Die Höhe des Auslaufspalts 13 wird in Abhängigkeit von der Bahngeschwindigkeit so gewählt, daß der Wert des Produkts Bahngeschwindigkeit (in m/min) x Spalthöhe (in mm) kleiner als 1500 ist. Bei einer Bahngeschwindigkeit von 1000 m/min ist die Spalthöhe somit geringer als 1,5 mm.The outlet seal 11 is arranged and designed so that an outlet gap 13 forms with the web 1, the height and length measured in the web running direction over the entire width of the suction box 8, ie over the entire axial length of the guide roller 4, is substantially constant. The length of the outlet gap 13 is more than 10 mm, preferably more than 30 mm, in particular 50 mm - 70 mm. The height of the outlet gap 13 is chosen as a function of the web speed so that the value of the product web speed (in m / min) x gap height (in mm) is less than 1500. At a web speed of 1000 m / min, the gap height is thus less than 1.5 mm.

Der über den Walzenumfang gemessene Abstand zwischen dem Ende der Einlaufdichtung 10 und dem Anfang der Auslaufdichtung 11 beträgt 50 mm - 500 mm. In diesem Bereich wird die Luftgrenzschicht durch den Unterdruck in dem Saugkasten 8 von der Bahn 1 abgesaugt. Es hat sich gezeigt, daß die Absaugung verbessert wird, wenn die Einlaufdichtung 10 und die Auslaufdichtung 11 so gestaltet sind, daß sie jeweils an ihrem Einlauf- und Auslaufende eine scharfe Kante aufweisen. Zumindest die Auslaufdichtung 11 ist daher an ihrem Einlauf- und ihrem Auslaufende scharfkantig gestaltet, bevorzugt weist auch die Einlaufdichtung 10 zumindest an ihrem Auslaufende eine entsprechend scharf gestaltete Kante auf.The measured over the roll circumference distance between the end of the inlet seal 10 and the beginning of the outlet seal 11 is 50 mm - 500 mm. In this area, the air boundary layer is sucked by the negative pressure in the suction box 8 of the web 1. It has been found that the suction is improved when the inlet seal 10 and the outlet seal 11 are designed so that they each have a sharp edge at its inlet and outlet ends. At least the outlet seal 11 is therefore at its inlet and designed their sharp-edged outlet, preferably, the inlet seal 10 at least at its outlet end on a correspondingly sharp edge.

Für eine gleichmäßige Verteilung des Unterdrucks in der Saugkammer 8 ist in dieser zumindest eine mit regelmäßig verteilten Öffnungen versehene Wand 15 angeordnet, die sich quer über die gesamte Breite des Saugkastens 8 erstreckt. Bevorzugt wird die Wand 15 von einem Lochblech gebildet, der den hinteren Bereich der Saugkammer 8 mit der Saugleitung 9 von dem vorderen Bereich abtrennt, der zur Bahn 1 hin geöffnet ist. Die Wand 15 stabilisiert zusätzlich den Aufbau des Saugkastens 8.For a uniform distribution of the negative pressure in the suction chamber 8 in this at least one provided with regularly distributed openings wall 15 is arranged, which extends across the entire width of the suction box 8. Preferably, the wall 15 is formed by a perforated plate which separates the rear region of the suction chamber 8 with the suction line 9 from the front region, which is open to the web 1 out. The wall 15 additionally stabilizes the construction of the suction box 8.

Zur weiteren Verbesserung des Ablösens der Luftgrenzschicht ist in dem Saugkasten 8 eine Korona-Aufladeelektrode 16 angeordnet, die mit einer Hochspannungsquelle verbunden ist. Eine derartige Korona-Aufladeelektrode und ihre Verwendung zum Ablösen einer gasförmigen laminaren Grenzschicht ist ausführlich in der EP 0837824-B1 beschrieben. Als Gegenelektrode an der anderen Bahnseite wirkt die Umlenkwalze 4, die dazu aus einem leitenden Material, beispielsweise aus Metall, gefertigt und geerdet ist. Die Aufladelektrode 8 erstreckt sich über die Breite des Saugkastens 8 und weist eine Reihe von parallel ausgerichteten Spitzen 17 auf, die zur Bahn 1 hin gerichtet sind. Die anliegende Hochspannung bewirkt, daß aus den Spitzen 17 der Aufladeelektrode 16 Elektronen oder Positronen austreten, die in der Luftgrenzschicht Turbulenzen erzeugen und diese somit aufwirbeln. Die Spitzen 17 erstrecken sich möglichst nahe an die Bahn 1, wobei der Abstand der zur Bahn 1 0,1 mm - 10 mm, vorzugsweise 1 mm - 5 mm beträgt. Der Abstand quer zur Bahn 1 zwischen zwei Spitzen 17 beträgt ca. 5 mm.To further improve the separation of the air boundary layer, a corona charging electrode 16 is arranged in the suction box 8, which is connected to a high voltage source. Such a corona charging electrode and its use for peeling off a gaseous laminar boundary layer is described in detail in US Pat EP 0837824 B1 described. As a counter electrode on the other side of the web deflecting roller 4, which is made of a conductive material, for example made of metal, and grounded acts. The charging electrode 8 extends across the width of the suction box 8 and has a series of parallel aligned tips 17 which are directed towards the web 1. The applied high voltage causes 16 emerge from the tips 17 of the charging electrode electrons or positrons, which generate turbulence in the air boundary layer and thus stir it up. The tips 17 extend as close as possible to the web 1, wherein the distance to the web 1 0.1 mm - 10 mm, preferably 1 mm - 5 mm. The distance across the web 1 between two tips 17 is about 5 mm.

Bei den in den Figuren 1 und 3 dargestellten Beschichtungsvorrichtungen ist der Saugkasten 8 jeweils so angeordnet, daß der Abstand vom Ende der Auslaufdichtung 11 zum aus der Schlitzdüse 2 austretenden Vorhang 3 10 mm - 200 mm, vorzugsweise 20 mm - 70 mm, beträgt. Bei diesem Abstand ist zum einen gewährleistet, daß sich auf dem Weg der Bahn zum Vorhang 3 keine neue störende Luftgrenzschicht aufbaut, zum anderen werden Störungen des Vorhangs 3 durch Ansaugen von Luft in den Auslaufspalt 13 vermieden. Damit bei der Beschichtungsvorrichtung nach Figur 3 der geringe Abstand der Auslaufdichtung 11 zum Vorhang 3 eingehalten werden kann, ist der dort verwendete und in Figur 4 dargestellte Saugkasten 8 an seinem Ende verlängert ausgebildet. Das Ende des Saugkastens 8 mit der Auslaufdichtung 11 erstreckt sich über die Scheitellinie der Umlenkwalze 4 hinweg.In the in the FIGS. 1 and 3 The coating device shown in the suction box 8 is in each case arranged so that the distance from the end of the outlet seal 11 to the exiting the slot 2 curtain 3 10 mm - 200 mm, preferably 20 mm - 70 mm. At this distance, on the one hand ensures that no new disturbing air boundary layer builds up on the way the train to the curtain 3, on the other disturbances of the curtain 3 are avoided by sucking air into the outlet gap 13. Thus in the coating device according to FIG. 3 the small distance of the outlet seal 11 to the curtain 3 can be maintained, is used there and in FIG. 4 Suction box 8 shown formed extended at its end. The end of the suction box 8 with the outlet seal 11 extends over the apex line of the guide roller 4 of time.

Vorteilhafterweise ist die obere Begrenzung des Saugkastens 8 so gestaltet, daß er nur wenig über den Umfang der Umlenkwalze 4 nach oben hinausragt. Dies ermöglicht es, die Randrinnen 5 oberhalb des Saugkastens 8 unmittelbar oberhalb des Bahnlaufs so anzuordnen, daß sie etwas gegen die Bahnlaufrichtung nach unten geneigt verlaufen, damit das aufgefangene Beschichtungsmaterial in die Wanne 6 abläuft. Bevorzugt ist der Saugkasten 8 von der Umlenkwalze 4 abschwenkbar gelagert, damit eine neue Bahn 1 in die Beschichtungsvorrichtung eingeführt werden kann. Zusätzlich wird so seine zur Bahn 1 hin offene Vorderseite für Wartungsarbeiten zugänglich.Advantageously, the upper boundary of the suction box 8 is designed so that it protrudes only slightly over the circumference of the guide roller 4 upwards. This makes it possible to arrange the edge troughs 5 above the suction box 8 immediately above the web run so that they run slightly downwards against the web running direction, so that the collected coating material runs into the trough 6. Preferably, the suction box 8 is pivoted away from the deflection roller 4, so that a new web 1 can be introduced into the coating apparatus. In addition, its open to the web 1 front is accessible for maintenance.

Claims (8)

  1. Device for sucking an air boundary layer away from a moving material web (1) deflected by a roll (4), having a suction box (8) which is arranged in the region of the deflecting roll (4) and which has the following features:
    a) the suction box (8) extends in its width over the axial length of the deflection roll (4), is open towards the deflection roll (4) and is connected to a suction fan,
    b) it has a seal (10, 11) on the inlet side and outlet side, which each form a gap (12, 13) with the web (1) and extend over the axial length of the deflection roll (4), at least the end of the seal (10) on the inlet side and the start of the seal (11) on the outlet side being located in the deflection region of the web (1) on the deflection roll (4),
    c) at each end of the deflection roll (4), the suction box (8) has an end seal (14), which extends on the outside beside the end, parallel to and at a short distance from the latter,
    d) the seal (11) on the outlet side is able to form an outlet gap (13) with the web (1), the height of which and the length of which, measured in the web running direction, are substantially constant over the entire width of the suction box (8), the length being more than 10 mm, preferably more than 30 mm, in particular 50 mm - 70 mm, and the gap height as a function of the web speed (m/min) x gap height (in mm) being less than 1500, and
    e) the distance, measured over the circumference of the roll, between the end of the inlet seal (10) and the start of the outlet seal (11) is 50 mm - 500 mm.
  2. Device according to Claim 1, characterized in that the outlet seal (11) is configured with a sharp edge at its inlet end and its outlet end.
  3. Device according to either of Claims 1 and 2, characterized in that in the suction chamber (8) there is arranged a wall (15) extending transversely and provided with openings, which separates the rear region having the suction line (9) from the front region which is open towards the web (1).
  4. Device according to one of Claims 1 to 3, characterized in that the suction box (8) is mounted such that it can be pivoted away from the deflection roll (4).
  5. Device according to one of Claims 1 to 4, characterized in that in the suction box (8) there is arranged a corona discharge electrode (16) having a series of tips oriented parallel to the web (1), which is connected to a high-voltage source.
  6. Device according to Claim 5, characterized in that the tips (17) of the electrode (16) have a spacing from the web (1) of 0.1 mm - 10 mm, preferably 1 mm - 5 mm.
  7. Apparatus for coating a moving material web (1), having a slot nozzle (2), from which the coating material emerges in a free-falling curtain (3), and a device arranged in front of the slot nozzle (2) for removing the air boundary layer adhering to the web (1), characterized in that, in the web running direction, a device according to one of Claims 1 to 6 is arranged in front of the slot nozzle (2).
  8. Apparatus according to Claim 7, characterized in that the suction box (8) is arranged in such a way that the distance from the end of the outlet seal (11) to the curtain (3) emerging from the slot nozzle (2) is 10 mm - 200 mm, preferably 20 mm - 70 mm.
EP02727525A 2001-04-09 2002-04-05 Device for suctioning an air boundary layer from a running web of material and apparatus for coating a running web using said suction device Expired - Lifetime EP1385635B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10117667 2001-04-09
DE10117667A DE10117667A1 (en) 2001-04-09 2001-04-09 Device for extracting an air boundary layer from a running material web
PCT/EP2002/003775 WO2002081102A1 (en) 2001-04-09 2002-04-05 Device for suctioning an air boundary layer from a running web of material

Publications (2)

Publication Number Publication Date
EP1385635A1 EP1385635A1 (en) 2004-02-04
EP1385635B1 true EP1385635B1 (en) 2012-09-12

Family

ID=7680953

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02727525A Expired - Lifetime EP1385635B1 (en) 2001-04-09 2002-04-05 Device for suctioning an air boundary layer from a running web of material and apparatus for coating a running web using said suction device

Country Status (4)

Country Link
US (1) US7175710B2 (en)
EP (1) EP1385635B1 (en)
DE (1) DE10117667A1 (en)
WO (1) WO2002081102A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI115732B (en) * 2003-06-05 2005-06-30 Metso Paper Inc Method and apparatus for surface sizing of paper or board
DE102004023575A1 (en) * 2004-05-13 2005-12-15 Voith Paper Patent Gmbh Device for applying one or both sides of at least one liquid or pasty application medium to a running surface
DE102004062330A1 (en) 2004-12-20 2006-06-22 Tlt-Turbo Gmbh Device for extracting a near-wall air boundary layer
US7707963B2 (en) * 2006-03-31 2010-05-04 3M Innovative Properties Company System for forming multi-layer films using corona treatments
US8281734B2 (en) * 2006-05-02 2012-10-09 Dow Corning Ireland, Ltd. Web sealing device
JP2009535514A (en) * 2006-05-02 2009-10-01 ダウ・コーニング・アイルランド・リミテッド Fluid exchange system
FI123510B (en) * 2008-12-15 2013-06-14 Metso Paper Inc Arrangement for restoration of a press fabric in a fiber web machine
US8590479B2 (en) 2011-07-25 2013-11-26 Transform Pack Inc. Preserving seasoning flavour profiles during the manufacturing of food-seasoning sheets

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3347378A (en) * 1966-06-14 1967-10-17 Ajem Lab Inc Filter apparatus
FR2000001A1 (en) * 1968-07-31 1969-08-29 Eastman Kodak Co
FI59637C (en) * 1979-11-20 1981-09-10 Valmet Oy ANORDNING I TORKPARTIET AV EN PAPPERSMASKIN
DE3710143A1 (en) * 1987-03-31 1988-10-13 Jagenberg Ag RAIL FEEDER ON ROLLING MACHINES
EP0440279A1 (en) * 1990-01-29 1991-08-07 Agfa-Gevaert N.V. Curtain coater for photographic elements
DE69026097T2 (en) * 1990-12-12 1996-10-02 Agfa Gevaert Nv Curtain coater
DE4116222A1 (en) * 1991-05-17 1992-11-19 Voith Gmbh J M RAILWAY APPARATUS
DE4141296A1 (en) * 1991-12-14 1993-06-17 Voith Gmbh J M Papermaking drying section - has suction box with structured sealing bar positions to detach web and carrier belt together from the drying cylinder surface
DE9211302U1 (en) * 1992-08-22 1992-10-08 Hoechst Ag, 6230 Frankfurt Device for generating a negative pressure
DE19525453A1 (en) * 1995-07-13 1997-01-16 Eltex Elektrostatik Gmbh Device for removing the gaseous laminar boundary layer
EP0906789B1 (en) * 1997-10-03 2001-09-19 TSE Troller Schweizer Engineering AG Process and apparatus for curtain coating of a travelling support
DE19829449A1 (en) * 1998-07-01 2000-01-05 Voith Sulzer Papiertech Patent Application device and application method
JP4113985B2 (en) * 1998-07-22 2008-07-09 富士フイルム株式会社 Application method and apparatus

Also Published As

Publication number Publication date
WO2002081102A1 (en) 2002-10-17
US7175710B2 (en) 2007-02-13
DE10117667A1 (en) 2002-10-10
EP1385635A1 (en) 2004-02-04
US20040112282A1 (en) 2004-06-17

Similar Documents

Publication Publication Date Title
EP0977636B1 (en) Method and device for applying dispersions on a strip of material
EP1385635B1 (en) Device for suctioning an air boundary layer from a running web of material and apparatus for coating a running web using said suction device
EP1198643B1 (en) Application device
EP1239974B1 (en) Device for coating a running material web
EP1377391B1 (en) Device for coating a moving material web
DE10012345A1 (en) Web coating station, for paper or cardboard, comprises applicator with delivery jet, to form structured free-fall coating curtain to moving web surface, with adjustments to set relative alignments of applicator and web
DE4205313C2 (en) Nozzle applicator for applying coating color on a paper web
DE2812946C3 (en) Device for coating an endless web
EP2198975B1 (en) Curtain application unit
EP2379230A1 (en) Curtain applicator
EP1432525B1 (en) Application device
EP2082811A2 (en) Multiple curtain painting device
DE102009032907B3 (en) Apparatus for removing residues from the surface of a moving belt and a belt processing system
EP2014376A2 (en) Curtain coating machine
DE3110821A1 (en) Coating device
DE1229105B (en) Device for cleaning a belt from dust
AT395183B (en) FABRIC DRAIN FOR A PAPER MACHINE OD. DGL.
EP3006115B1 (en) Method and device for curtain coating
CH407823A (en) Applicator for paints, varnishes, adhesives and other materials on at least weakly flexible material webs, such as paper, metal and plastic foils or fabrics
EP1289675B1 (en) Method and device for curtain coating
DE2652108A1 (en) Coating appliance for double-sided application to strip substrate - uses alignment unit engaging on one side of strip to be coated
EP1947241A1 (en) Method for curtain coating
DE20122838U1 (en) applicator
DE7636049U1 (en) DEVICE FOR THE TWO-SIDED COATING OF A CARRIER RAIL
DE102008040406A1 (en) Curtain applicator

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20030909

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

RBV Designated contracting states (corrected)

Designated state(s): DE FI

17Q First examination report despatched

Effective date: 20110908

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ANDRITZ HYDRO AG, ABMB

RTI1 Title (correction)

Free format text: DEVICE FOR SUCTIONING AN AIR BOUNDARY LAYER FROM A RUNNING WEB OF MATERIAL AND APPARATUS FOR COATING A RUNNING WEB USING SAID SUCTION DEVICE

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FI

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 50215603

Country of ref document: DE

Effective date: 20121108

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: ANDRITZ KUESTERS GMBH

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20130613

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 50215603

Country of ref document: DE

Effective date: 20130613

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FI

Payment date: 20140411

Year of fee payment: 13

Ref country code: DE

Payment date: 20140418

Year of fee payment: 13

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50215603

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151103

Ref country code: FI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20150405