EP1191144B1 - Curtain coating apparatus - Google Patents

Curtain coating apparatus Download PDF

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Publication number
EP1191144B1
EP1191144B1 EP01119808A EP01119808A EP1191144B1 EP 1191144 B1 EP1191144 B1 EP 1191144B1 EP 01119808 A EP01119808 A EP 01119808A EP 01119808 A EP01119808 A EP 01119808A EP 1191144 B1 EP1191144 B1 EP 1191144B1
Authority
EP
European Patent Office
Prior art keywords
deflection
web
edge strip
applicator according
curtain
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
EP01119808A
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German (de)
French (fr)
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EP1191144A1 (en
Inventor
Richard Bernert
Manfred Ueberschär
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Voith Patent GmbH
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Voith Paper Patent GmbH
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Publication date
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Publication of EP1191144A1 publication Critical patent/EP1191144A1/en
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    • 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
    • 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 applying liquid or pasty application medium on a running material web, comprehensively Curtain application work, which is the order medium as essentially gravity moving curtain or veil to the Dispenses material web, and a device which is at least a complete Covering at least one of the edge strips of the material web a predetermined width prevented.
  • Such a device is for example from WO 98/48113 known.
  • the edge of the Excess application medium applied according to a material web the first embodiment is vacuumed off from these edge strips again, while according to an alternative second embodiment, panel elements are provided which the order medium in the area of Catch edge strips and so a wetting of the edge strips with application medium do not allow at all.
  • the desire for a reduction covering the edge strips with application medium or a complete one Avoiding such a covering of the verge is in the Justified by the fact that otherwise support elements, for example support rollers, Deflection elements, for example deflection rollers, or the like elements that come into contact with the material web laterally over themselves the application medium moving out the edge of the material web is dirty could become.
  • the devices in this case To clean these elements would be required, would not only be space need, but also increase the design effort and the Complicate the operation of the entire system.
  • a generic device solved in which the device, which at least a complete Covering at least one of the edge strips of the material web on one predetermined width prevents the at least one edge strip at least in the area of the curtain application from the material web level deflects.
  • the invention is based on the knowledge that only the Deflection of the edge strip from the material web level is sufficient to the degree of coverage or the coverage cross profile of the edge strip to determine or a covering of the verge fully avoid. Therefore, according to the invention can be susceptible to contamination Aperture elements as they are from the prior art discussed above were used to be completely dispensed with. As below will be explained in detail, the deflection device arranged and / or designed so that they are practically none Danger of contamination from the application medium curtain or application medium splash is exposed.
  • the Deflection device the amount and, if desired, the shape of the Deflection of the edge strip influenced.
  • edge strip is to remain completely uncovered, this can be done can be achieved in that the deflection device the edge strip deflects in such a way that it moves by one in the area of the application medium curtain obtuse angle is deflected.
  • the margin is under the useful strip of the material web "folded” so that the useful strip quasi acts as a "panel element” that covers the edge strip prevented.
  • this "aperture element" is covered with
  • the application medium is not considered to be “dirt” to look at, but as a desired coating with Application medium.
  • the deflection device can Deflect edge strips mechanically.
  • the deflection device can comprise at least one deflection rod which from the side facing away from the direction of deflection onto the edge strip acts.
  • This deflection rod can, for example, by one to the direction of travel the material web is pivotable substantially parallel axis be arranged, it at certain pivoting intervals or also infinitely swiveling can be fixed in the desired swivel positions can to adjust the degree of deflection of the edge strip.
  • a plurality can be able to deflect out of the plane of the material web such one arranged consecutively in the running direction of the material web Deflection rods may be provided.
  • the deflection device can also comprise at least one deflection bar, that of the direction of deflection opposite side acts on the edge strip and the edge strip increasingly in the direction of travel of the material web from the material web level deflects.
  • a deflection bar is particularly suitable for Influencing the shape of the deflection of the edge strip.
  • the at least one deflection bar or the at least one deflection bar are in sliding contact with the material web, it is preferred if it is made of a wear-resistant material are formed.
  • the at least one deflection rod or the at least one deflection bar on a holder preferably detachable, to be appropriate.
  • the at least one deflection bar or at least one deflection bar in Direction of the material web seen before the position of the curtain applicator is arranged or ends, preferably between about 1 cm and about 20 cm before the position of the curtain applicator.
  • the deflection device influences the edge strip in the area of the edge strip prevailing pressure, preferably air pressure.
  • the deflection device can, for example, at least one blowing device comprise, the blow nozzle preferably on the edge strip is directed.
  • the blowing nozzle at least one blowing device on the one facing the deflection direction Side of the material web to be directed to this transition area.
  • blowing devices can be used for deflection of the edge strip and / or to stabilize the transition area between the edge strips and the remaining material web also suction devices be used.
  • the deflection device comprise a web moisture influencing device, which the material web specifically moistened in predetermined material web areas and / or dries.
  • This web moisture influencing device can advantageously on the transition area between the edge strips and the rest Act on material web.
  • the web of material their surface facing away from the direction of deflection is specifically moistened so that it swells up locally. Additionally or alternatively, it can be on your the surface facing the direction of deflection is specifically dried, so that it contracts there. This targeted moistening or / and Drying leads to a deformation causing the desired deflection the material web.
  • the relative position of the deflection device is adjustable with respect to the material web. It is possible to optimize the relative position during operation. Further the deflection device can also be used for the course of the material web certain area can be swiveled, for example around the retraction to enable or facilitate the material web.
  • a deflection or feedback device can basically be the same as those described above Alternative designs of the deflection device, just with the difference, that the edge strip is not from the material web level deflects, but leads back into this.
  • Fig. 1 is a first embodiment of an inventive Application device generally designated 10. It includes one in FIG. 1 only schematically illustrated curtain-order work 12 that the Application medium 14 in the form of a curtain or veil 16 essentially releases to the material web 18 due to gravity.
  • the web of material 18 moves in a substantially orthogonal to the plane of the drawing Direction L, in the illustrated embodiment in the drawing plane into it.
  • the aim of using such a curtain application unit 12 is to the Material web 18 to apply exactly the amount of application medium on this should also remain (1: 1 order). This is different from that previously widespread way of working, in which the order medium with large excess was applied to the material web, the surplus order medium then again from the Material web was scraped off.
  • the goal of this larger dimension is to have only one central section the application medium curtain 16 for coating the material web 18 use because the thickness of the application medium curtain 16 in the running direction L in the area of its edges 16a by constriction effects and the same is influenced and thus a coating of the material web 18 in the desired thickness or with the desired area or Line weight cannot be ensured.
  • edge strips 1 8a of the material web 18 from the Material web level E deflected to nevertheless cover them in less Allow dimensions or completely avoid their coverage to be able to.
  • this is in the running direction L before the position of the curtain applicator 12 a deflection rod 20 by one to the running direction L in Axis A, which runs essentially parallel, is pivotably arranged.
  • This Deflection rod 20 can, as can be seen in FIGS. 1, 3 and 5, in different Swivel positions can be fixed to different degrees to be able to act on the edge strip 18a of the material web 18.
  • the deflection rod 20 is with the material web 18 or with their edge strips 18a not yet in contact. This has 2 consequence that the material web 18 over its entire width, i.e. also in the area of the edge strip 18a with the same layer thickness of application medium 14 is covered.
  • the deflecting rod 20 is now slightly against the edge strip 18a of the material web 18, he directs it in the direction of the arrow R, i.e. 3 downwards, with the edge strip 18a encloses an acute angle ⁇ with the material web plane E.
  • the gradual deflection of the edge strip 18a can, for example by a plurality of one behind the other in the running direction L of the material web 18 arranged deflection bars 20 take place.
  • this plurality of deflection rods 20 into a single one To summarize deflection bar, its angle of attack against the material web 18 or their edge strips 18a with increasing approach the position of the curtain applicator 12 increases.
  • the edge strip 18a becomes in the direction of the arrow by influencing the air pressure which prevails in the region of the edge strip 18a on the surface 18e facing the application medium curtain 16 and / or the surface 18f of the material web 18 opposite this R deflected.
  • a first blowing device 22 is provided which, on the side of the surface 18e, ejects the air (or another gas compatible with the application operation, for example nitrogen, carbon dioxide or the like) under pressure in the direction of the arrow P 1 onto the edge strip 18a.
  • Another blowing device 24 discharges compressed air on the side of the surface 18f in the direction of arrow P 2 towards the transition region 18d between the edge strip 18a and the useful strip 18c of the material web 18 in order to ensure that the edge strip 18a is bent at the desired location.
  • This stabilization of the transition area 18d can in principle also be ensured by a suction device 26 which sucks air out of this transition area 18d in the direction of the arrow P 3 .
  • a suction device 26 which sucks air out of this transition area 18d in the direction of the arrow P 3 .
  • the function of the blowing device 22 can also be replaced by a corresponding suction device on the other side of the material web 18.
  • the edge strip 18a is cut through targeted moistening or drying of the material web 18 deflected.
  • a moistening device 28 is provided on the side of the material web 18, which a humidification medium 30, preferably water, as a spray releases to the surface 18e of the material web 18.
  • the aim of this humidification is to target the material web 18 in the transition region 18d Bring sources.
  • a heating device 32 is on the other side associated with surface 18f the material web 18, which dries the material web 18 in a targeted manner. By this drying is intended to produce a desired contraction of the material web 18 be achieved.
  • the swelling of the material web associated with the moistening 18 or / and the contraction associated with the drying of the Material web 18 in the area of the respective surfaces 18e or 18f Material web 18 causes the material web 18 to bend in the direction of the arrow R.

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  • Coating Apparatus (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Formation And Processing Of Food Products (AREA)
  • Saccharide Compounds (AREA)

Abstract

The applicator (10), to apply a liquid or paste coating (14) to the surface of a moving web (18), has a curtain applicator unit (12) where a curtain (16) of the coating falls by gravity on to the web. A limit (20) prevents surface coating over a defined width, and at least at one edge strip (18a) of the web, by deflecting the edge strip out of the web plane (E) at least at the applicator.

Description

Die Erfindung betrifft eine Vorrichtung zum Auftragen von flüssigem oder pastösem Auftragsmedium auf eine laufende Materialbahn, umfassend ein Vorhang-Auftragswerk, welches das Auftragsmedium als sich im Wesentlichen schwerkraftbedingt bewegenden Vorhang oder Schleier an die Materialbahn abgibt, und eine Einrichtung, welche zumindest eine vollständige Bedeckung wenigstens eines der Randstreifen der Materialbahn auf einer vorbestimmten Breite verhindert.The invention relates to a device for applying liquid or pasty application medium on a running material web, comprehensively Curtain application work, which is the order medium as essentially gravity moving curtain or veil to the Dispenses material web, and a device which is at least a complete Covering at least one of the edge strips of the material web a predetermined width prevented.

Eine derartige Vorrichtung ist beispielsweise aus der WO 98/48113 bekannt. Bei dieser Vorrichtung wird das auf die Randstreifen der Materialbahn aufgetragene überschüssige Auftragsmedium gemäß einer ersten Ausführungsvariante von diesen Randstreifen wieder abgesaugt, während gemäß einer alternativen zweiten Ausführungsvariante Blendenelemente vorgesehen sind, welche das Auftragsmedium im Bereich der Randstreifen abfangen und so eine Benetzung der Randstreifen mit Auftragsmedium erst gar nicht zulassen. Der Wunsch nach einer Reduzierung der Bedeckung der Randstreifen mit Auftragsmedium bzw. einer vollständigen Vermeidung einer derartigen Bedeckung der Randstreifen ist in der Tatsache begründet, dass andernfalls Stützelemente, beispielsweise Stützwalzen, Umlenkelemente, beispielsweise Umlenkwalzen, oder dergleichen mit der Materialbahn in Kontakt tretende Elemente durch sich seitlich über die Randkanten der Materialbahn hinausbewegendes Auftragsmedium verschmutzt werden könnten. Die Vorrichtungen, die in diesem Fall zurReinigung dieser Elemente erforderlich wären, würden nicht nur Bauraum benötigen, sondern auch den konstruktiven Aufwand erhöhen und den Betriebsablauf der Gesamtanlage verkomplizieren. Such a device is for example from WO 98/48113 known. In this device, the edge of the Excess application medium applied according to a material web the first embodiment is vacuumed off from these edge strips again, while according to an alternative second embodiment, panel elements are provided which the order medium in the area of Catch edge strips and so a wetting of the edge strips with application medium do not allow at all. The desire for a reduction covering the edge strips with application medium or a complete one Avoiding such a covering of the verge is in the Justified by the fact that otherwise support elements, for example support rollers, Deflection elements, for example deflection rollers, or the like elements that come into contact with the material web laterally over themselves the application medium moving out the edge of the material web is dirty could become. The devices in this case To clean these elements would be required, would not only be space need, but also increase the design effort and the Complicate the operation of the entire system.

Die gleichen Nachteile bestehen auch bei den aus der WO 98/47630 und der WO 99/09253 bekannten Anlagen. Bei diesen Anlagen sind knapp oberhalb der Materialbahn im Bereich deren Randstreifen in Querrichtung verstellbare Elemente zum Abfangen des Auftragsmediums vorgesehen.The same disadvantages also exist in those from WO 98/47630 and the systems known from WO 99/09253. These systems are just above the material web in the area of its edge strips in the transverse direction adjustable elements are provided to intercept the application medium.

Demgegenüber ist es Aufgabe der Erfindung, eine Auftragsvorrichtung der eingangs genannten Art anzugeben, welche einfacher aufgebaut ist und die vorstehend diskutierten Nachteile vermeidet.In contrast, it is an object of the invention, an application device Specify the type mentioned above, which is simpler and the avoids disadvantages discussed above.

Diese Aufgabe wird erfindungsgemäß durch eine gattungsgemäße Vorrichtung gelöst, bei welcher die Einrichtung, welche zumindest eine vollständige Bedeckung wenigstens eines der Randstreifen der Materialbahn auf einer vorbestimmten Breite verhindert, den wenigstens einen Randstreifen zumindest im Bereich des Vorhang-Auftragswerks aus der Materialbahn-Ebene auslenkt. Die Erfindung beruht auf der Erkenntnis, dass allein die Auslenkung des Randstreifens aus der Materialbahn-Ebene ausreicht, um den Grad der Bedeckung bzw. das Bedeckungs-Querprofil des Randstreifens zu bestimmen bzw. eine Bedeckung des Randstreifens voll ständig zu vermeiden. Daher kann erfindungsgemäß auf verschmutzungsanfällige Blendenelemente, wie sie vom vorstehend diskutierten Stand der Technik eingesetzt wurden, vollständig verzichtet werden. Wie nachfolgend noch detailliert erläutert werden wird, kann die Auslenkeinrichtung derart angeordnet oder/und ausgebildet sein, dass sie praktisch keiner Verschmutzungsgefahr durch den Auftragsmedium-Vorhang bzw. Auftragsmedium-Spritzer ausgesetzt ist.This object is achieved by a generic device solved, in which the device, which at least a complete Covering at least one of the edge strips of the material web on one predetermined width prevents the at least one edge strip at least in the area of the curtain application from the material web level deflects. The invention is based on the knowledge that only the Deflection of the edge strip from the material web level is sufficient to the degree of coverage or the coverage cross profile of the edge strip to determine or a covering of the verge fully avoid. Therefore, according to the invention can be susceptible to contamination Aperture elements as they are from the prior art discussed above were used to be completely dispensed with. As below will be explained in detail, the deflection device arranged and / or designed so that they are practically none Danger of contamination from the application medium curtain or application medium splash is exposed.

Zur Erzielung des gewünschten Bedeckungsgrads bzw. des gewünschten Bedeckungs-Querprofils des Randstreifens ist es bevorzugt, wenn die Auslenkeinrichtung den Betrag und gewünschtensfalls auch die Form der Auslenkung des Randstreifens beeinflusst. To achieve the desired degree of coverage or the desired Covering cross profile of the edge strip, it is preferred if the Deflection device the amount and, if desired, the shape of the Deflection of the edge strip influenced.

Soll eine Restbedeckung des Randstreifens zugelassen werden, die jedoch vorzugsweise zur Randkante der Materialbahn hin abnimmt, so kann dies dadurch erzielt werden, dass die Auslenkeinrichtung den Randstreifen derart auslenkt, dass er im Bereich des Auftragsmedium-Vorhangs um einen spitzen Winkel ausgelenkt ist. Ohne Berücksichtigung von Querverteilungseffekten des auf die Materialbahn aufgebrachten Auftragsmediums und ohne Berücksichtigung des Verlaufs der Materialbahn in dem Übergangsbereich zwischen Randstreifen und Nutzstreifen der Materialbahn wird der Bedeckungsgrad im Bereich des Randstreifens verglichen mit dem Auftrag im Bereich des Nutzstreifens um einen dem Kosinus des spitzen Winkels entsprechenden Faktor gemindert.Should a residual covering of the edge strip be allowed, however preferably decreases towards the edge of the material web, this can can be achieved in that the deflection device the edge strip in this way deflects that in the area of the application medium curtain by one acute angle is deflected. Without taking into account cross-distribution effects the application medium applied to the material web and without taking into account the course of the material web in the transition area between the edge strip and the useful strip of the material web Degree of coverage in the area of the edge strip compared to the order in the area of the useful strip around the cosine of the acute angle corresponding factor decreased.

Soll der Randstreifen hingegen vollständig unbedeckt bleiben, so kann dies dadurch erreicht werden, dass die Auslenkeinrichtung den Randstreifen derart auslenkt, dass er im Bereich des Auftragsmedium-Vorhangs um einen stumpfen Winkel ausgelenkt ist. In diesem Fall wird der Randstreifen unter den Nutzstreifen der Materialbahn "eingeklappt", so dass der Nutzstreifen quasi als "Blendenelement" wirkt, das die Bedeckung des Randstreifens verhindert. Allerdings ist die Bedeckung dieses "Blendenelements" mit Auftragsmedium im Unterschied zum Stand der Technik nicht als "Verschmutzung" anzusehen, sondern als eine erwünschte Beschichtung mit Auftragsmedium.However, if the edge strip is to remain completely uncovered, this can be done can be achieved in that the deflection device the edge strip deflects in such a way that it moves by one in the area of the application medium curtain obtuse angle is deflected. In this case, the margin is under the useful strip of the material web "folded" so that the useful strip quasi acts as a "panel element" that covers the edge strip prevented. However, this "aperture element" is covered with In contrast to the prior art, the application medium is not considered to be "dirt" to look at, but as a desired coating with Application medium.

Gemäß einer ersten Ausführungsalternative kann die Auslenkeinrichtung den Randstreifen mechanisch auslenken.According to a first alternative embodiment, the deflection device can Deflect edge strips mechanically.

Gemäß einer ersten Untervariante dieser mechanischen Auslenkalternative kann die Auslenkvorrichtung wenigstens einen Auslenkstab umfassen, der von der der Auslenkrichtung abgewandten Seite her auf den Randstreifen einwirkt. Dieser Auslenkstab kann beispielsweise um eine zur Laufrichtung der Materialbahn im Wesentlichen parallel verlaufende Achse schwenkbar angeordnet sein, wobei er in bestimmten Schwenkintervallen oder auch stufenlos schwenkbar in gewünschten Schwenkpositionen fixiert werden kann, um den Grad der Auslenkung des Randstreifens einstellen zu können.According to a first sub-variant of this mechanical deflection alternative the deflection device can comprise at least one deflection rod which from the side facing away from the direction of deflection onto the edge strip acts. This deflection rod can, for example, by one to the direction of travel the material web is pivotable substantially parallel axis be arranged, it at certain pivoting intervals or also infinitely swiveling can be fixed in the desired swivel positions can to adjust the degree of deflection of the edge strip.

Um den Randstreifen in Laufrichtung der Materialbahn allmählich zunehmend aus der Materialbahn-Ebene auslenken zu können, kann eine Mehrzahl derartiger in Laufrichtung der Materialbahn aufeinander folgend angeordneter Auslenkstäbe vorgesehen sein.Gradually increasing around the edge strip in the direction of travel of the material web A plurality can be able to deflect out of the plane of the material web such one arranged consecutively in the running direction of the material web Deflection rods may be provided.

Gemäß einer zweiten Untervariante kann die Auslenkvorrichtung aber auch wenigstens eine Auslenkleiste umfassen, die von der der Auslenkrichtung abgewandten Seite her auf den Randstreifen einwirkt und den Randstreifen in Laufrichtung der Materialbahn zunehmend aus der Materialbahn-Ebene auslenkt. Eine derartige Auslenkleiste eignet sich insbesondere zur Beeinflussung der Form der Auslenkung des Randstreifens.According to a second sub-variant, the deflection device can also comprise at least one deflection bar, that of the direction of deflection opposite side acts on the edge strip and the edge strip increasingly in the direction of travel of the material web from the material web level deflects. Such a deflection bar is particularly suitable for Influencing the shape of the deflection of the edge strip.

Da der wenigstens eine Auslenkstab bzw. die wenigstens eine Auslenkleiste mit der Materialbahn in Gleitkontakt stehen, ist es bevorzugt, wenn sie aus einem verschleißfesten Material gebildet sind.Since the at least one deflection bar or the at least one deflection bar are in sliding contact with the material web, it is preferred if it is made of a wear-resistant material are formed.

Wie bereits angesprochen, kann der wenigstens eine Auslenkstab bzw. die wenigstens eine Auslenkleiste an einer Halterung, vorzugsweise lösbar, angebracht sein.As already mentioned, the at least one deflection rod or the at least one deflection bar on a holder, preferably detachable, to be appropriate.

Um eine Verschmutzung des Auslenkstabs bzw. der Auslenkleiste mit Auftragsmedium sicher verhindern zu können, wird vorgeschlagen, dass der wenigstens eine Auslenkstab bzw. die wenigstens eine Auslenkleiste in Laufrichtung der Materialbahn gesehen vor der Position des Vorhang-Auftragswerks angeordnet ist bzw. endet, vorzugsweise zwischen etwa 1 cm und etwa 20 cm vor der Position des Vorhang-Auftragswerks. To keep the deflection bar or the deflection bar dirty To be able to reliably prevent the order medium, it is proposed that the at least one deflection bar or at least one deflection bar in Direction of the material web seen before the position of the curtain applicator is arranged or ends, preferably between about 1 cm and about 20 cm before the position of the curtain applicator.

Gemäß einer zweiten Ausführungsalternative kann vorgesehen sein, dass die Auslenkeinrichtung den Randstreifen unter Beeinflussung des im Bereich des Randstreifens herrschenden Drucks, vorzugsweise Luftdrucks, auslenkt.According to a second alternative embodiment, it can be provided that the deflection device influences the edge strip in the area of the edge strip prevailing pressure, preferably air pressure.

Hierzu kann die Auslenkvorrichtung beispielsweise wenigstens eine Blasvorrichtung umfassen, deren Blasdüse vorzugsweise auf den Randstreifen gerichtet ist. Zur Stabilisierung des Übergangsbereichs zwischen dem Randstreifen und der restlichen Materialbahn kann ferner die Blasdüse wenigstens einer Blasvorrichtung auf der der Auslenkrichtung zugewandten Seite der Materialbahn auf diesen Übergangsbereich gerichtet sein.For this purpose, the deflection device can, for example, at least one blowing device comprise, the blow nozzle preferably on the edge strip is directed. To stabilize the transition area between the Edge strips and the remaining material web can also be the blowing nozzle at least one blowing device on the one facing the deflection direction Side of the material web to be directed to this transition area.

Alternativ zum Einsatz von Blasvorrichtungen können jedoch zur Auslenkung des Randstreifens oder/und zur Stabilisierung des Übergangsbereichs zwischen Randstreifen und restlicher Materialbahn auch Saugvorrichtungen eingesetzt werden.As an alternative to using blowing devices, however, can be used for deflection of the edge strip and / or to stabilize the transition area between the edge strips and the remaining material web also suction devices be used.

Gemäß einer dritten Ausführungsalternative kann die Auslenkeinrichtung eine Bahnfeuchte-Beeinflussungsvorrichtung umfassen, welche die Materialbahn in vorbestimmten Materialbahnbereichen gezielt befeuchtet oder/und trocknet. Diese Bahnfeuchte-Beeinflussungsvorrichtung kann vorteilhafterweise auf den Übergangsbereich zwischen den Randstreifen und der restlichen Materialbahn einwirken. Beispielsweise kann die Materialbahn auf ihrer der Auslenkrichtung abgewandten Oberfläche gezielt befeuchtet werden, damit sie lokal aufquillt. Zusätzlich oder alternativ kann sie auf ihrer der Auslenkrichtung zugewandten Oberfläche gezielt getrocknet werden, damit sie sich dort zusammenzieht. Dieses gezielte Befeuchten oder/und Trocknen führt zu einer die gewünschte Auslenkung hervorrufenden Verformung der Materialbahn.According to a third alternative embodiment, the deflection device comprise a web moisture influencing device, which the material web specifically moistened in predetermined material web areas and / or dries. This web moisture influencing device can advantageously on the transition area between the edge strips and the rest Act on material web. For example, the web of material their surface facing away from the direction of deflection is specifically moistened so that it swells up locally. Additionally or alternatively, it can be on your the surface facing the direction of deflection is specifically dried, so that it contracts there. This targeted moistening or / and Drying leads to a deformation causing the desired deflection the material web.

Um die gewünschte Form und den gewünschten Grad der Auslenkung des Randstreifens sicherstellen zu können, wird für alle vorstehend diskutierten Ausführungsalternativen vorgeschlagen, dass die Relativlage der Auslenkvorrichtung bezüglich der Materialbahn verstellbar ist. Dabei ist es möglich, eine Optimierung der Relativlage während des Betriebs vorzunehmen. Ferner kann die Auslenkvorrichtung auch aus dem für den Verlauf der Materialbahn bestimmten Bereich abschwenkbar sein, beispielsweise um das Einziehen der Materialbahn zu ermöglichen bzw. zu erleichtern.To the desired shape and degree of deflection of the Ensuring edge patrols is common to everyone discussed above Alternative embodiments proposed that the relative position of the deflection device is adjustable with respect to the material web. It is possible to optimize the relative position during operation. Further the deflection device can also be used for the course of the material web certain area can be swiveled, for example around the retraction to enable or facilitate the material web.

Um auch für eine kontrollierte Rückführung des Randstreifens in die Materialbahn-Ebene sorgen zu können, kann auch in Laufrichtung der Materialbahn hinter dem Vorhang-Auftragswerk eine Auslenk- bzw. Rückführeinrichtung vorgesehen sein. Diese Rückführeinrichtung kann grundsätzlich genauso ausgebildet sein wie die vorstehend beschriebenen Ausführungsalternativen der Auslenkeinrichtung, bloß eben mit dem Unterschied, dass sie den Randstreifen nicht aus der Materialbahn-Ebene auslenkt, sondern in diese zurückführt.In order also for a controlled return of the edge strip into the Being able to provide material web level can also be in the direction of travel Material web behind the curtain applicator a deflection or feedback device be provided. This feedback device can basically be the same as those described above Alternative designs of the deflection device, just with the difference, that the edge strip is not from the material web level deflects, but leads back into this.

Die Erfindung wird im Folgenden an Ausführungsbeispielen anhand der. beigefügten Zeichnungen näher erläutert werden. Es stellt dar:

Fig. 1 bis 6
Darstellungen zur Erläuterung des Aufbaus und der Funktion einer mechanisch arbeitenden Auslenkvorrichtung sowie des damit erzielten Auftragsergebnisses;
Fig. 7
eine Ansicht ähnlich Fig. 2 einer mit Beeinflussung der Druckverhältnisse im Bereich des Randstreifens arbeitenden Auslenkeinrichtung; und
Fig. 8
eine Ansicht ähnlich Fig. 2 einer den Feuchtegrad der Materialbahn beeinflussenden Auslenkeinrichtung.
The invention is illustrated below with the aid of exemplary embodiments. attached drawings are explained in more detail. It shows:
1 to 6
Representations to explain the structure and function of a mechanically operating deflection device and the order result achieved thereby;
Fig. 7
a view similar to FIG. 2 of a deflection device which works by influencing the pressure conditions in the region of the edge strip; and
Fig. 8
a view similar to FIG. 2 of a deflection device influencing the degree of moisture of the material web.

In Fig. 1 ist eine erste Ausführungsvariante einer erfindungsgemäßen Auftragsvorrichtung allgemein mit 10 bezeichnet. Sie umfasst ein in Fig. 1 lediglich schematisch dargestelltes Vorhang-Auftragswerk 12, das das Auftragsmedium 14 in Form eines Vorhangs bzw. Schleiers 16 im Wesentlichen schwerkraftbedingt an die Materialbahn 18 abgibt. Die Materialbahn 18 bewegt sich dabei in einer zur Zeichenebene im Wesentlichen orthogonalen Richtung L, im dargestellten Ausführungsbeispiel in die Zeichenebene hinein.In Fig. 1 is a first embodiment of an inventive Application device generally designated 10. It includes one in FIG. 1 only schematically illustrated curtain-order work 12 that the Application medium 14 in the form of a curtain or veil 16 essentially releases to the material web 18 due to gravity. The web of material 18 moves in a substantially orthogonal to the plane of the drawing Direction L, in the illustrated embodiment in the drawing plane into it.

Ziel des Einsatzes eines derartigen Vorhang-Auftragswerks 12 ist es, auf die Materialbahn 18 genau die Menge an Auftragsmedium aufzubringen, die auf dieser auch verbleiben soll (1:1-Auftrag). Dies steht im Unterschied zu der bisher weit verbreiteten Arbeitsweise, bei welcher das Auftragsmedium mit großem Überschuss auf die Materialbahn aufgebracht wurde, wobei das überschüssige Auftragsmedium dann im weiteren Verlauf wieder von der Materialbahn abgerakelt wurde.The aim of using such a curtain application unit 12 is to the Material web 18 to apply exactly the amount of application medium on this should also remain (1: 1 order). This is different from that previously widespread way of working, in which the order medium with large excess was applied to the material web, the surplus order medium then again from the Material web was scraped off.

Zur Vermeidung einer Verschmutzung von Stützwalzen, Umlenkwalzen oder dergleichen mit der Materialbahn in Kontakt tretenden Elementen ist es bei. der Beschichtung einer Materialbahn 18 mitAuftragsmedium 14 erwünscht, einen Randstreifen 18a der Materialbahn überhaupt nicht oder nur in geringerem Maße mit Auftragsmedium 14 zu bedecken. Das Problem des Einsatzes eines Vorhang-Auftragswerks 12 besteht in diesem Zusammenhang darin, dass der Auftragsmedium-Vorhang 16 in Querrichtung Q der Materialbahn 18 gemessen eine größere Breite aufweisen sollte als die Materialbahn 18. Ziel dieser größeren Bemessung ist es, nur einen zentralen Abschnitt des Auftragsmedium-Vorhangs 16 zur Beschichtung der Materialbahn 18 zu verwenden, da die Dicke des Auftragsmedium-Vorhangs 16 in Laufrichtung L im Bereich von dessen Rändern 16a durch Einschnürungseffekte und dergleichen beeinflusst wird und somit eine Beschichtung der Materialbahn 18 in der gewünschten Stärke bzw. mit dem gewünschten Flächen- bzw. Strichgewicht nicht sichergestellt werden kann.To avoid contamination of back-up rolls, deflection rolls or the same is in contact with the material web elements. the coating of a material web 18 with application medium 14 is desired, an edge strip 18a of the material web not at all or only to a lesser extent Cover dimensions with application medium 14. The problem of use a curtain application unit 12 exists in this context in that the application medium curtain 16 in the transverse direction Q of the material web Measured 18 should have a greater width than the material web 18. The goal of this larger dimension is to have only one central section the application medium curtain 16 for coating the material web 18 use because the thickness of the application medium curtain 16 in the running direction L in the area of its edges 16a by constriction effects and the same is influenced and thus a coating of the material web 18 in the desired thickness or with the desired area or Line weight cannot be ensured.

Erfindungsgemäß werden die Randstreifen 1 8a der Materialbahn 18 aus der Materialbahn-Ebene E ausgelenkt, um gleichwohl ihre Bedeckung in geringerem Maße bzw. die vollständige Vermeidung ihrer Bedeckung ermöglichen zu können.According to the edge strips 1 8a of the material web 18 from the Material web level E deflected to nevertheless cover them in less Allow dimensions or completely avoid their coverage to be able to.

Erfindungsgemäß ist hierzu in Laufrichtung L vor der Position des Vorhang-Auftragswerks 12 ein Auslenkstab 20 um eine zur Laufrichtung L im Wesentlichen parallel verlaufende Achse A schwenkbar angeordnet. Dieser Auslenkstab 20 kann, wie Fig. 1, 3 und 5 zu entnehmen ist, in verschiedenen Schwenkpositionen fixiert werden, um in unterschiedlichem Maße auf den Randstreifen 18a der Materialbahn 18 einwirken zu können.According to the invention, this is in the running direction L before the position of the curtain applicator 12 a deflection rod 20 by one to the running direction L in Axis A, which runs essentially parallel, is pivotably arranged. This Deflection rod 20 can, as can be seen in FIGS. 1, 3 and 5, in different Swivel positions can be fixed to different degrees to be able to act on the edge strip 18a of the material web 18.

In der Darstellung gemäß Fig. 1 steht der Auslenkstab 20 mit der Materialbahn 18 bzw. mit deren Randstreifen 18a noch nicht in Kontakt. Dies hat gemäß Fig. 2 zur Folge, dass die Materialbahn 18 über ihre gesamte Breite, d.h. auch im Bereich des Randstreifens 18a mit der gleichen Schichtdicke an Auftragsmedium 14 bedeckt wird.In the illustration according to FIG. 1, the deflection rod 20 is with the material web 18 or with their edge strips 18a not yet in contact. this has 2 consequence that the material web 18 over its entire width, i.e. also in the area of the edge strip 18a with the same layer thickness of application medium 14 is covered.

Wird nun gemäß Fig. 3 der Auslenkstab 20 leicht gegen den Randstreifen 18a der Materialbahn 18 angestellt, so lenkt er diesen in Richtung des Pfeils R, d.h. in der Darstellung gemäß Fig. 3 nach unten, aus, wobei der Randstreifen 18a mit der Materialbahn-Ebene E einen spitzen Winkel α einschließt. Dies führt aufgrund der Schrägstellung des Randstreifens 18a zur Fallrichtung des Auftragsmedium-Vorhangs 16 zu einer geringeren, d.h. genauer gesagt zu einer zum Materialbahnrand 18b hin abnehmenden Bedeckung der Materialbahn 18 mit Auftragsmedium 14 (siehe Fig. 4).3, the deflecting rod 20 is now slightly against the edge strip 18a of the material web 18, he directs it in the direction of the arrow R, i.e. 3 downwards, with the edge strip 18a encloses an acute angle α with the material web plane E. This leads to due to the inclined position of the edge strip 18a Fall direction of the application medium curtain 16 to a lower, i.e. more precisely to a decreasing towards the material web edge 18b Covering the material web 18 with application medium 14 (see FIG. 4).

Wird der Auslenkstab 20 schließlich so stark gegen den Randstreifen 18a angestellt, dass dieser unter deren nutzbaren Bereich 1 8c zurückgeknickt ist (stumpfer Winkel β; siehe Fig. 5), so wirkt dieser nutzbare Bereich 18c quasi als "Blendenelement", der eine Bedeckung des Randstreifens 18a verhindert, während es in einem Übergangsabschnitt 18d zwischen dem Randstreifen 18a und dem Nutzstreifen 18c zu einer abnehmenden Bedeckung der Materialbahn 18 mit Auftragsmedium 14 kommt (siehe Fig. 6). Finally, the deflecting rod 20 becomes so strong against the edge strip 18a employed that this bent back under their usable area 1 8c (obtuse angle β; see FIG. 5), this usable area 18c acts quasi as a "panel element", which covers the edge strip 18a prevented while it is in a transition section 18d between the Edge strip 18a and the useful strip 18c for a decreasing coverage the material web 18 comes with application medium 14 (see FIG. 6).

Gemäß der Abfolge der Fig. 1, 3 und 5 könnte somit der Randstreifen 18a der Materialbahn 18 bei deren Bewegung auf das Vorhang-Auftragswerk 12 zu allmählich zunehmend abgeknickt werden, um eine allzustarke Belastung der Materialbahn 18 durch ein abruptes Abknicken des Randstreifens 18a zu vermeiden. Dabei ist es nicht notwendigerweise erforderlich, dass der Randstreifen 18a im Zustand maximaler Auslenkung unter den Nutzstreifen 18c der Materialbahn 18 zurückgeklappt wird, wie dies in Fig. 5 dargestellt ist.According to the sequence of FIGS. 1, 3 and 5, the edge strip 18a the material web 18 as it moves onto the curtain applicator 12 too kinked gradually to an overly heavy burden the material web 18 by abruptly kinking the edge strip 18a to avoid. It is not necessary that the Edge strips 18a in the state of maximum deflection under the useful strips 18c of the material web 18 is folded back, as shown in FIG. 5 is.

Die allmähliche Auslenkung des Randstreifens 18a kann beispielsweise durch eine Mehrzahl von in Laufrichtung L der Materialbahn 18 in hintereinander angeordneten Auslenkstäben 20 erfolgen. Alternativ ist es jedoch auch möglich, diese Mehrzahl von Auslenkstäben 20 zu einer einzigen Auslenkleiste zusammenzufassen, deren Anstellwinkel gegen die Materialbahn 18 bzw. deren Randstreifen 18a mit fortschreitender Annäherung an die Position des Vorhang-Auftragswerks 12 zunimmt.The gradual deflection of the edge strip 18a can, for example by a plurality of one behind the other in the running direction L of the material web 18 arranged deflection bars 20 take place. However, it is an alternative also possible, this plurality of deflection rods 20 into a single one To summarize deflection bar, its angle of attack against the material web 18 or their edge strips 18a with increasing approach the position of the curtain applicator 12 increases.

Bei der in Fig. 7 dargestellten Ausführungsform wird der Randstreifen 18a durch Beeinflussung des Luftdrucks, der im Bereich des Randstreifens 18a an der dem Auftragsmedium-Vorhang 16 zugewandten Oberfläche 18e oder/und der dieser gegenüberliegenden Oberfläche 18f der Materialbahn 18 herrscht, in Richtung des Pfeils R ausgelenkt. Hierzu ist eine erste Blasvorrichtung 22 vorgesehen, welche auf Seiten der Oberfläche 18e die Luft (oder ein anderes mit dem Auftragsbetrieb verträgliches Gas, beispielsweise Stickstoff, Kohlendioxid oder dergleichen) unter Druck in Richtung des Pfeils P1 auf den Randstreifen 18a gerichtet ausstößt. Eine weitere Blasvorrichtung 24 stößt auf Seiten der Oberfläche 18f Druckluft in Richtung des Pfeils P2 auf den Übergangsbereich 18d zwischen Randstreifen 18a und Nutzstreifen 18c der Materialbahn 18 gerichtet aus, um das Abknicken des Randstreifens 18a an der gewünschten Stelle sicherzustellen. In the embodiment shown in FIG. 7, the edge strip 18a becomes in the direction of the arrow by influencing the air pressure which prevails in the region of the edge strip 18a on the surface 18e facing the application medium curtain 16 and / or the surface 18f of the material web 18 opposite this R deflected. For this purpose, a first blowing device 22 is provided which, on the side of the surface 18e, ejects the air (or another gas compatible with the application operation, for example nitrogen, carbon dioxide or the like) under pressure in the direction of the arrow P 1 onto the edge strip 18a. Another blowing device 24 discharges compressed air on the side of the surface 18f in the direction of arrow P 2 towards the transition region 18d between the edge strip 18a and the useful strip 18c of the material web 18 in order to ensure that the edge strip 18a is bent at the desired location.

Diese Stabilisierung des Übergangsbereichs 18d kann grundsätzlich aber auch durch eine Saugvorrichtung 26 gewährleistet werden, welche Luft in Richtung des Pfeils P3 aus diesem Übergangsbereich 18d absaugt. Obgleich dies in Fig. 7 nicht dargestellt ist, kann auch die Funktion der Blasvorrichtung 22 durch eine entsprechende Saugvorrichtung auf der anderen Seite der Materialbahn 18 ersetzt werden.This stabilization of the transition area 18d can in principle also be ensured by a suction device 26 which sucks air out of this transition area 18d in the direction of the arrow P 3 . Although this is not shown in FIG. 7, the function of the blowing device 22 can also be replaced by a corresponding suction device on the other side of the material web 18.

Bei der Ausführungsform gemäß Fig. 8 wird der Randstreifen 18a durch gezieltes Befeuchten bzw. Trocknen der Materialbahn 18 ausgelenkt. In der dargestellten Ausführungsform ist auf der Oberfläche 18e zugeordneten Seite der Materialbahn 18 eine Befeuchtungsvorrichtung 28 vorgesehen, welche ein Befeuchtungsmedium 30, vorzugsweise Wasser, als Sprühnebel an die Oberfläche 18e der Materialbahn 18 abgibt. Ziel dieser Befeuchtung ist es, die Materialbahn 18 in dem Übergangsbereich 18d gezielt zum Quellen zu bringen. Auf der der Oberfläche 18f zugeordneten, anderen Seite der Materialbahn 18 ist eine Heizvorrichtung 32 als Beispiel für eine Vorrichtung dargestellt, welche die Materialbahn 18 gezielt trocknet. Durch diese Trocknung soll eine gewünschte Kontraktion der Materialbahn 18 erzielt werden. Das mit dem Befeuchten einhergehende Quellen der Materialbahn 18 oder/und die mit der Trocknung einhergehende Kontraktion der Materialbahn 18 im Bereich der jeweiligen Oberflächen 18e bzw. 18f der Materialbahn 18 bewirken ein Abknicken der Materialbahn 18 in Richtung des Pfeils R.In the embodiment according to FIG. 8, the edge strip 18a is cut through targeted moistening or drying of the material web 18 deflected. In the illustrated embodiment is associated on surface 18e A moistening device 28 is provided on the side of the material web 18, which a humidification medium 30, preferably water, as a spray releases to the surface 18e of the material web 18. The aim of this humidification is to target the material web 18 in the transition region 18d Bring sources. On the other side associated with surface 18f the material web 18 is a heating device 32 as an example of a Device shown, which dries the material web 18 in a targeted manner. By this drying is intended to produce a desired contraction of the material web 18 be achieved. The swelling of the material web associated with the moistening 18 or / and the contraction associated with the drying of the Material web 18 in the area of the respective surfaces 18e or 18f Material web 18 causes the material web 18 to bend in the direction of the arrow R.

Claims (19)

  1. Apparatus (10) for applying liquid or pasty application medium (14) to a moving web (18), comprising:
    a curtain applicator unit (12), which discharges the application medium (14) onto the web (18) as a curtain or veil (14) which moves substantially under the force of gravity, and
    a device (20; 22, 24, 26; 28, 32) which at least prevents complete coverage of at least one of the edge strips (18a) of the web (18) over a predetermined width,
    characterized in that this device (20; 22, 24, 26; 28, 32) deflects the at least one edge strip (18a) out of the plane (E) of the web, at least in the area of the curtain applicator unit (12).
  2. Applicator according to Claim 1, characterized in that the deflection device (20; 22, 24, 26; 28, 32) influences the magnitude and, if desired, the shape of the deflection of the edge strip (18a).
  3. Applicator according to Claim 1 or 2,
    characterized in that the deflection device (20; 22, 24, 26; 28, 32) deflects the edge strip (18a) in such a way that it is deflected through an acute angle (#) in the area of the curtain (16) of application medium.
  4. Applicator according to Claim 1 or 2, characterized in that the deflection device (20; 22, 24, 26; 28, 32) deflects the edge strip (18a) in such a way that it is deflected through an obtuse angle (#) in the area of the curtain (16) of application medium.
  5. Applicator according to one of Claims 1 to 4, characterized in that the deflection device (20) deflects the edge strip (18a) mechanically.
  6. Applicator according to Claim 5, characterized in that the deflection device (20) comprises at least one deflection rod, which acts on the edge strip (18a) from the side facing away from the deflection direction (R).
  7. Applicator according to Claim 5 or 6, characterized in that a plurality of deflection rods (20) is provided, which are arranged following one another in the running direction (L) of the web (18) and deflect the edge strip (18a) increasingly out of the plane (E) of the web in the running direction (L) of the web (18).
  8. Applicator according to Claim 5, characterized in that the deflection device (20) comprises at least one deflection strip, which acts on the edge strip (18a) from the side facing away from the deflection direction (R) and deflects the edge strip (18a) increasingly out of the plane (E) of the web in the running direction (L) of the web (18).
  9. Applicator according to one of Claims 5 to 8, characterized in that the at least one deflection rod (20) or the at least one deflection strip is formed from a wear-resistant material.
  10. Applicator according to one of Claims 5 to 9, characterized in that the at least one deflection rod (20) or the at least one deflection strip is fitted, preferably detachably, to a holder.
  11. Applicator according to one of Claims 5 to 10, characterized in that the at least one deflection rod (20) or the at least one deflection strip, as viewed in the running direction (L) of the web (18), is arranged or ends upstream of the position of the curtain applicator unit (12), preferably between about 1 cm and about 20 cm upstream of the position of the curtain applicator unit (12).
  12. Applicator according to one of Claims 1 to 4, characterized in that the deflection device (22, 24, 26) deflects the edge strip (18a) by influencing the pressure prevailing in the area of the edge strip (18a).
  13. Applicator (10) according to Claim 12, characterized in that the deflection device comprises at least one blowing device (22), whose blowing nozzle is preferably aimed at the edge strip (18a).
  14. Applicator according to Claim 12 or 13, characterized in that the blowing nozzle of at least one blowing device (24) is aimed at the transition region (18d) on the side (18f) of the web (18) facing the deflection direction (R) between the edge strip (18a) and the remainder of the web (18).
  15. Applicator according to one of Claims 12 to 14, characterized in that the deflection device comprises at least one suction device (26), whose suction nozzle is preferably aimed at the edge strip (18a).
  16. Applicator according to one of Claims 12 to 15, characterized in that the suction nozzle of at least one suction device on the side (18e) of the web (18) facing away from the deflection direction (R) is aimed at the transition region (18d) between the edge strip (18a) and the remainder of the web (18).
  17. Applicator according to one of Claims 1 to 4, characterized in that the deflection device comprises a web moisture influencing device (28, 32), which deliberately moistens and/or dries the web (18) in predetermined areas of the web.
  18. Applicator according to Claim 17, characterized in that the web moisture influencing device (28, 32) acts on the transition region (18d) between the edge strip (18a) and the remainder of the web (18c).
  19. Applicator according to one of Claims 1 to 18, characterized in that the relative position of the deflection device (20; 22, 24, 26; 28, 32) is adjustable with respect to the web (18).
EP01119808A 2000-09-22 2001-08-16 Curtain coating apparatus Expired - Lifetime EP1191144B1 (en)

Applications Claiming Priority (2)

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DE10047167A DE10047167A1 (en) 2000-09-22 2000-09-22 Curtain coater
DE10047167 2000-09-22

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EP1191144A1 EP1191144A1 (en) 2002-03-27
EP1191144B1 true EP1191144B1 (en) 2003-11-26

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US (1) US6454859B1 (en)
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JP (1) JP2002102769A (en)
AT (1) ATE255189T1 (en)
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10359677A1 (en) 2003-12-18 2005-07-14 Voith Paper Patent Gmbh Method for one-sided or double-sided curtain or veiling application to the surface of a moving material web, in particular of paper or cardboard
DE102005036667A1 (en) 2005-08-04 2007-02-08 Voith Patent Gmbh Application process
JP5292623B2 (en) * 2007-09-12 2013-09-18 ボイス パテント ゲーエムベーハー Curtain coater edge treatment equipment
DE102007000777A1 (en) 2007-09-27 2009-04-02 Voith Patent Gmbh Device for applying liquid to pasty coating medium e.g. paint in form of freely falling curtain onto a machine for producing and/or converting moving paper-, cardboard- or other fibrous-material web, comprises curtain application nozzle

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Publication number Priority date Publication date Assignee Title
DE3300150A1 (en) * 1983-01-04 1984-07-05 Agfa-Gevaert Ag, 5090 Leverkusen METHOD AND DEVICE FOR STABILIZING FREE-FALLING LIQUID CURTAINS
US4559896A (en) * 1983-09-15 1985-12-24 Ciba Geigy Corporation Coating apparatus
FI81400C (en) 1984-10-25 1990-10-10 Valmet Oy FOERFARANDE OCH ANORDNING I EN PAPPERSMASKIN I KILUTRYMMET MELLAN INLOPPSLAODANS LAEPPBALK OCH BROESTVALSEN.
DE3605613A1 (en) 1986-02-21 1987-08-27 Jagenberg Ag COATING DEVICE FOR COATING RAILWAYS
US4830887A (en) * 1988-04-22 1989-05-16 Eastman Kodak Company Curtain coating method and apparatus
FI93242C (en) * 1993-03-25 1995-03-10 Valmet Paper Machinery Inc Method and apparatus for limiting the coating width and / or preventing damage to the roll ends during coating or surface sizing of paper or similar web material
DE19716466A1 (en) * 1997-04-21 1998-10-22 Bachofen & Meier Ag Method and device for applying dispersions to a material web
DE19716647A1 (en) * 1997-04-21 1998-10-22 Jagenberg Papiertech Gmbh Method and device for applying a pigment coating ink to a paper or cardboard web
DE19735588A1 (en) * 1997-04-21 1999-02-18 Jagenberg Papiertech Gmbh Coating a moving web
DE59807083D1 (en) * 1997-08-15 2003-03-06 Voith Paper Patent Gmbh METHOD AND DEVICE FOR APPLYING A PIGMENT COATING COLOR TO A PAPER OR CARDBOARD FILM
JP4431649B2 (en) * 1999-09-22 2010-03-17 株式会社Ｉｈｉ Curtain coater color backside prevention device

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DE10047167A1 (en) 2002-04-11
US20020035964A1 (en) 2002-03-28
ATE255189T1 (en) 2003-12-15
JP2002102769A (en) 2002-04-09
EP1191144A1 (en) 2002-03-27
US6454859B1 (en) 2002-09-24
DE50101017D1 (en) 2004-01-08

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