EP0841588B1 - Process and apparatus for curtain-coating a moving substrate - Google Patents

Process and apparatus for curtain-coating a moving substrate Download PDF

Info

Publication number
EP0841588B1
EP0841588B1 EP98100164A EP98100164A EP0841588B1 EP 0841588 B1 EP0841588 B1 EP 0841588B1 EP 98100164 A EP98100164 A EP 98100164A EP 98100164 A EP98100164 A EP 98100164A EP 0841588 B1 EP0841588 B1 EP 0841588B1
Authority
EP
European Patent Office
Prior art keywords
curtain
cutter
extracting
coating
lateral
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.)
Revoked
Application number
EP98100164A
Other languages
German (de)
French (fr)
Other versions
EP0841588A3 (en
EP0841588A2 (en
Inventor
Markus Gueggi
Maurice Pasquier
Peter Schweizer
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.)
Ilford Imaging Switzerland GmbH
Original Assignee
Ilford Imaging Switzerland GmbH
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8221736&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0841588(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Ilford Imaging Switzerland GmbH filed Critical Ilford Imaging Switzerland GmbH
Priority to DE59510277T priority Critical patent/DE59510277D1/en
Priority to EP98100164A priority patent/EP0841588B1/en
Publication of EP0841588A2 publication Critical patent/EP0841588A2/en
Publication of EP0841588A3 publication Critical patent/EP0841588A3/en
Application granted granted Critical
Publication of EP0841588B1 publication Critical patent/EP0841588B1/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1039—Recovery of excess liquid or other fluent material; Controlling means therefor
    • 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
    • B05C5/007—Slide-hopper coaters, i.e. apparatus in which the liquid or other fluent material flows freely on an inclined surface before contacting the work
    • B05C5/008—Slide-hopper curtain coaters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D1/00—Processes for applying liquids or other fluent materials
    • B05D1/30—Processes for applying liquids or other fluent materials performed by gravity only, i.e. flow coating
    • B05D1/305—Curtain coating

Definitions

  • the present invention relates to a method and a device for curtain coating a moving Carrier with a liquid coating material according to Preamble of claims 1 and 3.
  • This Coating especially when the machine is wide and high speed, there are a large number of problems to stabilize the curtain and if possible to bring evenly on the surface.
  • EP-A-606 038 is also a device for Removal of the curtain edges with working as a knife
  • the plates approximately perpendicular to Curtain are arranged and the curtain edge over one arranged parallel to the length of the curtain Slot is sucked off.
  • the height of these knives is very high small and there is a risk that part of the Coating solution gets under the whole device, what leads to contamination.
  • FIG. 1 schematically shows part of a coating device shown as part of a system.
  • the foundry plates 1 see also Figure 4, with the side attached side boundary plates 2, which the Casting solution 3 is limited for the respective casting width.
  • the coating device also assigns one coating carrier 8 on the casting roll 9 and is guided under the coating device.
  • Figure 1 the direction of rotation of the casting roll is also shown.
  • the page-limiting Liquid film no longer parallel to the casting solution, or to the curtain, but across it, that is, see in particular Figure 3, the liquid film 10 parallel to the flow-limiting front wall 7 ' Lateral guide 7 initiated, the liquid film 10 flows in a groove 14 in the side guide and part forms the front wall of the side guide.
  • the liquid for example water or a water / gelatin solution through a metering slot 11 inserted, the slot end 12 being shaped such that the liquid film 10 regularly and with uniform thickness, the groove 14 in the side guide flows down.
  • a knife 15 attached, the outer geometry is known per se.
  • this knife also points to flow separations to avoid a leading edge 16 on that a sharp one with respect to the inside of the side guide Angle ⁇ of 0 - 30 °, for example 10 ° forms and parallel to the front wall of the side guide, i.e. perpendicular to the longitudinal extension the curtain is arranged.
  • a suction slot 18 At the top 17 of the knife is in the front wall Side guide arranged a suction slot 18, the height 0.05 - 0.5 mm, see Fig. 2.
  • This slot 18 is via a suction duct 19 with a fan or other vacuum system connected to the cut Aspirate the edge of the curtain and the liquid film 10. there with the knife 15 a few mm of the curtain cut off.
  • the suction of the liquid film and the Curtain edge brings about a substantial stabilization of the Curtain.
  • a suction slot 20 To the by the compressed curtain edge on the edge of the Avoiding suction knife formed bead is at the bottom edge of the knife arranged a suction slot 20, the connected to a vacuum system via a channel 21 which can be the same as for the suction slot 18.
  • This channel preferably also contains a water rinse. As shown in Figure 2, this creates an edge of Coating 22 that can be used without loss.
  • the knife height at the cutting edge S of the knife can be 1 - 15 mm amount and it is appropriate to use the suction slot from one Knife height of 3 mm to be used, while at a Knife height of 1 - 3 mm dispenses with a suction slot can be.
  • the delimiting edge 25 of the Side boundary plates is not vertical, but one Has cutting edge 24, which cutting edge has an angle of for example includes 60 °, which means that the two Edge of the cutting edge with the 22 perpendicular to the coating an angle ⁇ and ⁇ of 10 - 80 °, preferably 60 °, exhibit.
  • the distance H between the cutting edge is 24 and the surface of the foundry plates 0.3 - 2.5 mm, preferably 0.8 mm. This will make the effect of Surface tension is reduced to a minimum, and there will be lateral displacements of the casting solution largely avoided.
  • inventive Device can be varied with respect to the specified mass can and the most diverse coating conditions and Casting solution combinations can be adjusted. While every single measure already extensive improvements with regard to the quality of the coating results in a Combination of all improvements, such as Vacuuming the cut edges, vacuuming the at Knife jammed pouring solution as well as avoiding the by the Differences in layer thickness due to surface tension and guiding a thin film of liquid along the Side boundary plates a particularly stable Coating, the edges of which do not lose material or Cause more drying problems.

Description

Die vorliegende Erfindung bezieht sich auf ein Verfahren und eine Vorrichtung zur Vorhangbeschichtung eines bewegten Trägers mit einem flüssigen Beschichtungsmaterial gemäss Oberbegriff der Patentansprüche 1 und 3. Bei dieser Beschichtung, insbesondere bei grosser Breite der Maschinen und grosser Geschwindigkeit ergeben sich eine grosse Anzahl von Problemen, um den Vorhang zu stabilisieren und möglichst gleichmässig auf die Unterlage zu bringen.The present invention relates to a method and a device for curtain coating a moving Carrier with a liquid coating material according to Preamble of claims 1 and 3. In this Coating, especially when the machine is wide and high speed, there are a large number of problems to stabilize the curtain and if possible to bring evenly on the surface.

In der EP-B-281 520 wird der Spülflüssigkeitsfilm zusammen mit dem durch ein Messer abgeschnittenen Vorhangrand weggeleitet. Dabei steht die Vorderkante des Messers mit einem Winkel α nach innen. Dies bewirkt jedoch, dass die Randzone des Vorhanges komprimiert und auf der Beschichtung ein Randwulst erzeugt wird. Dieser Randwulst ist eine unerwünschte Störung, die zu Materialverlusten und Trocknungsproblemen führt.In EP-B-281 520 the rinsing liquid film is put together with the curtain edge cut off by a knife diverted. The front edge of the knife stands with an angle α inwards. However, this causes the Edge zone of the curtain compressed and on the coating an edge bead is generated. This bead is one unwanted disruption that leads to material loss and Drying problems.

Aus der EP-A-606 038 ist ausserdem eine Vorrichtung zur Entfernung der Vorhangränder mit als Messer arbeitende Platten bekannt, wobei die Platten etwa senkrecht zum Vorhang angeordnet sind und der Vorhangrand über einen parallel zur Längserstreckung des Vorhangs angeordneten Schlitz abgesaugt wird. Die Höhe dieser Messer ist sehr klein und es besteht die Gefahr, dass ein Teil der Beschichtungslösung unter die ganze Vorrichtung gelangt, was zu Verschmutzungen führt. Ausserdem wird dort das Problem des verdickten Randes nicht berührt und es besteht die Gefahr, dass bei einer Bewegung des Vorhangs dieser die Absaugvorrichtung berührt. From EP-A-606 038 is also a device for Removal of the curtain edges with working as a knife Known plates, the plates approximately perpendicular to Curtain are arranged and the curtain edge over one arranged parallel to the length of the curtain Slot is sucked off. The height of these knives is very high small and there is a risk that part of the Coating solution gets under the whole device, what leads to contamination. In addition, there is the problem of the thickened edge and does not exist Danger that if the curtain moves, the Suction device touched.

In der EP-A-139 211 werden zwar zwei Absaugdüsen beidseits des Vorhangs offenbart, jedoch keine Kombination von Schneidmessern mit Absaugvorrichtung.In EP-A-139 211 two suction nozzles are used on both sides of the curtain, but no combination of Cutting knives with suction device.

Es ist demgegenüber eine Aufgabe der vorliegenden Erfindung ein Verfahren und eine Vorrichtung anzugeben, mit dem eine gleichmässige Beschichtung mit sauberen Kanten ohne wesentlichen Materialverlust erzielt werden kann. Diese Aufgabe wird mit dem Verfahren und der Vorrichtung gemäss den unabhängigen Patentansprüchen 1 und 3 gelöst. Weitere Vorteile sind in den abhängigen Ansprüchen definiert.In contrast, it is an object of the present invention to provide a method and an apparatus with which a uniform coating with clean edges without material loss can be achieved. This The task is accomplished with the method and the device according to the independent claims 1 and 3 solved. Further Advantages are defined in the dependent claims.

Die Erfindung wird im folgenden anhand einer Zeichnung eines Ausführungsbeispiels näher erläutert.

Figur 1
zeigt in perspektivischer Sicht und schematisch einen Teil einer Vorhangbeschichtungsanlage,
Figur 2
zeigt in einem Längsschnitt die wesentlichen Teile der erfindungsgemässen Vorrichtung,
Figur 3
ist ein Schnitt gemäss der Linie III-III in Figur 2,
Figur 4
zeigt in perspektivischer Sicht ein Detail der Vorrichtung von Figur 1, und
Figur 5
zeigt einen Schnitt gemäss der Linie V-V in Figur 4.
The invention is explained below with reference to a drawing of an embodiment.
Figure 1
shows a perspective view and schematically a part of a curtain coating system,
Figure 2
shows in a longitudinal section the essential parts of the device according to the invention,
Figure 3
is a section along the line III-III in Figure 2,
Figure 4
shows a perspective view of a detail of the device of Figure 1, and
Figure 5
shows a section along the line VV in Figure 4.

In Figur 1 ist schematisch ein Teil einer BeschichtungsVorrichtung als Teil einer Anlage dargestellt. Man erkennt die Giesserplatten 1, siehe auch Figur 4, mit den seitlich angebrachten Seitenbegrenzungsplatten 2, womit die Giesslösung 3 für die jeweilige Giessbreite begrenzt wird. FIG. 1 schematically shows part of a coating device shown as part of a system. One recognises the foundry plates 1, see also Figure 4, with the side attached side boundary plates 2, which the Casting solution 3 is limited for the respective casting width.

An der Lippe 4 der Giesserfrontplatte 5 beginnt der freie Fall des Vorhanges. Von diesem Punkt an muss der Vorhang 6 durch die Seitenführungen 7 stabilisiert werden. Ohne diese Seitenführungen würde sich der Vorhang unter der Wirkung der Oberflächenspannung gegen die Mitte zusammenziehen.The free begins at the lip 4 of the foundry front plate 5 Fall of the curtain. From this point on, the curtain 6 be stabilized by the side guides 7. Without these The curtains would be under the effect of the side guides Pull the surface tension towards the middle.

Die Beschichtungsvorrichtung weist ferner einen zu beschichtenden Träger 8 auf, der um die Giesswalze 9 und unter der Beschichtungsvorrichtung geführt wird. In Figur 1 ist auch der Drehsinn der Giesswalze eingezeichnet.The coating device also assigns one coating carrier 8 on the casting roll 9 and is guided under the coating device. In Figure 1 the direction of rotation of the casting roll is also shown.

Bei der vorliegenden Vorrichtung wird der seitenbegrenzende Flüssigkeitsfilm nicht mehr parallel zur Giesslösung, bzw. zum Giessvorhang eingeleitet, sondern quer dazu, das heisst, siehe insbesondere Figur 3, der Flüssigkeitsfilm 10 wird parallel zur strömungsbegrenzenden Vorderwand 7' der Seitenführung 7 eingeleitet, wobei der Flüssigkeitsfilm 10 in einer Nut 14 in der Seitenführung fliesst und einen Teil der Vorderwand der Seitenführung bildet. Wie aus Figur 2 hervorgeht, wird die Flüssigkeit, beispielsweise Wasser oder eine Wasser/Gelatinelösung, durch einen Dosierschlitz 11 eingeführt, wobei das Schlitzende 12 derart geformt ist, dass der Flüssigkeitsfilm 10 regelmässig und mit gleichförmiger Dicke die Nut 14 in der Seitenführung hinabströmt.In the present device, the page-limiting Liquid film no longer parallel to the casting solution, or to the curtain, but across it, that is, see in particular Figure 3, the liquid film 10 parallel to the flow-limiting front wall 7 ' Lateral guide 7 initiated, the liquid film 10 flows in a groove 14 in the side guide and part forms the front wall of the side guide. As from Figure 2 emerges, the liquid, for example water or a water / gelatin solution through a metering slot 11 inserted, the slot end 12 being shaped such that the liquid film 10 regularly and with uniform thickness, the groove 14 in the side guide flows down.

Dadurch wird erreicht, dass der Flüssigkeitsfilm und damit auch die Berührungslinie 13 zwischen Giessvorhang 6 und Flüssigkeitsfilm 10 ortsstabil ist, womit unkontrollierte wellenförmige Bewegungen im Vorhang vermieden werden. Zum Flüssigkeitsfilm können Zusätze wie Netzmittel und/oder Substanzen zur Erhöhung der elektrischen Leitfähigkeit beigegeben werden. This ensures that the liquid film and thus also the line of contact 13 between curtain 6 and Liquid film 10 is stable, which means uncontrolled wavy movements in the curtain can be avoided. To the Liquid film can be additives such as wetting agents and / or Substances to increase electrical conductivity be added.

Am unteren Ende der Seitenführungen ist je ein Messer 15 angebracht, dessen äussere Geometrie an sich bekannt ist. Insbesondere weist auch dieses Messer, um Strömungs-Ablösungen zu vermeiden, eine Vorderkante 16 auf, die bezüglich der Innenseite der Seitenführung einen spitzen Winkel α von 0 - 30°, beispielsweise 10° bildet und parallel zur Vorderwand der Seitenführung, d.h. senkrecht zur Längserstreckung des Vorhangs angeordnet ist.At the bottom of the side guides is a knife 15 attached, the outer geometry is known per se. In particular, this knife also points to flow separations to avoid a leading edge 16 on that a sharp one with respect to the inside of the side guide Angle α of 0 - 30 °, for example 10 ° forms and parallel to the front wall of the side guide, i.e. perpendicular to the longitudinal extension the curtain is arranged.

An der Oberseite 17 des Messers ist in der Vorderwand der Seitenführung ein Absaugschlitz 18 angeordnet, dessen Höhe 0,05 - 0,5 mm beträgt, siehe Fig. 2. Dieser Schlitz 18 ist über einen Absaugkanal 19 mit einem Ventilator oder einer sonstigen Unterdruckanlage verbunden, um den abgeschnittenen Vorhangrand sowie den Flüssigkeitsfilm 10 abzusaugen. Dabei werden mit dem Messer 15 einige mm des Vorhanges abgeschnitten. Das Absaugen des Flüssigkeitsfilms sowie des Vorhangrandes bewirkt eine wesentliche Stabilisierung des Vorhanges. Durch das gleichzeitige Absaugen des meistens aus Wasser bestehenden Flüssigkeitsfilms mit der Gelatine enthaltenden Vorhangflüssigkeit wird eine Verdünnung der Gelatine erzielt und damit eine Verkrustung der Absaugwege verhindert.At the top 17 of the knife is in the front wall Side guide arranged a suction slot 18, the height 0.05 - 0.5 mm, see Fig. 2. This slot 18 is via a suction duct 19 with a fan or other vacuum system connected to the cut Aspirate the edge of the curtain and the liquid film 10. there with the knife 15 a few mm of the curtain cut off. The suction of the liquid film and the Curtain edge brings about a substantial stabilization of the Curtain. By sucking off most of the time Water existing liquid film with the gelatin containing curtain liquid is a dilution of the Gelatin is achieved and thus a crusting of the suction paths prevented.

Um den durch den komprimierten Vorhangrand an der Kante des Saugmessers gebildeten Wulst zu vermeiden, ist an der unteren Kante des Messers ein Saugschlitz 20 angeordnet, der über einen Kanal 21 mit einer Unterdruckanlage verbunden ist, die dieselbe wie für den Absaugschlitz 18 sein kann. Vorzugsweise enthält auch dieser Kanal eine Wasserspülung. Wie in Figur 2 dargestellt, entsteht dadurch ein Rand der Beschichtung 22, der ohne Verlust verwendet werden kann.To the by the compressed curtain edge on the edge of the Avoiding suction knife formed bead is at the bottom edge of the knife arranged a suction slot 20, the connected to a vacuum system via a channel 21 which can be the same as for the suction slot 18. This channel preferably also contains a water rinse. As shown in Figure 2, this creates an edge of Coating 22 that can be used without loss.

Die Messerhöhe an der Schneide S des Messers kann 1 - 15 mm betragen und es ist zweckmässig, den Saugschlitz ab einer Messerhöhe von 3 mm zu verwenden, während bei einer Messerhöhe von 1 - 3 mm auf einen Absaugschlitz verzichtet werden kann.The knife height at the cutting edge S of the knife can be 1 - 15 mm amount and it is appropriate to use the suction slot from one Knife height of 3 mm to be used, while at a Knife height of 1 - 3 mm dispenses with a suction slot can be.

Weitere Störungen können durch die vor der Giesserlippe angeordneten Seitenbegrenzungsplatten entstehen, so beispielsweise Schichtdickenfehler im Randbereich, dadurch dass die Giesslösung unter der Wirkung der OberflächenSpannung an den Seiten der Seitenbegrenzungsplatten in die Höhe steigt, da die vorbekannten Seitenbegrenzungsplatten eine rechtwinklige Stirnseite aufweisen. Die Seiten-Begrenzungsplatten 2 werden dicht auf die Giesserplatten 1 montiert, siehe Figuren 4 und 5, so dass sie sämtliche Giesserplatten und auch den Bogen 23 der Giesserfrontplatte 5 bis zur Giesserlippe 4 überdecken.Other disorders can be caused by the front of the lip arranged side boundary plates arise, so for example, layer thickness defects in the edge area that the casting solution under the effect of surface tension on the sides of the side boundary plates in the Height rises because of the previously known side boundary plates have a right-angled face. The side boundary plates 2 are sealed onto the foundry plates 1 assembled, see Figures 4 and 5, so that they all Giesserplatten and also the sheet 23 of the Giesserfrontplatte Cover 5 to the pouring lip 4.

Aus Figur 5 geht hervor, dass die begrenzende Kante 25 der Seitenbegrenzungsplatten nicht senkrecht ist, sondern eine Schneide 24 aufweist, wobei diese Schneide einen Winkel von beispielsweise 60° einschliesst, das heisst, dass die beiden Kanten der Schneide mit der zur Beschichtung 22 Senkrechten einen Winkel β und Γ von je 10 - 80°, vorzugsweise 60°, aufweisen. Dabei beträgt der Abstand H zwischen der Schneide 24 und der Oberfläche der Giesserplatten 0,3 - 2,5 mm, vorzugsweise 0,8 mm. Dadurch wird die Wirkung der Oberflächenspannung auf ein Minimum reduziert, und es werden seitliche Verschiebungen der Giesslösung weitgehendst vermieden.It can be seen from FIG. 5 that the delimiting edge 25 of the Side boundary plates is not vertical, but one Has cutting edge 24, which cutting edge has an angle of for example includes 60 °, which means that the two Edge of the cutting edge with the 22 perpendicular to the coating an angle β and Γ of 10 - 80 °, preferably 60 °, exhibit. The distance H between the cutting edge is 24 and the surface of the foundry plates 0.3 - 2.5 mm, preferably 0.8 mm. This will make the effect of Surface tension is reduced to a minimum, and there will be lateral displacements of the casting solution largely avoided.

Es ist selbstverständlich, dass die erfindungsgemässe Vorrichtung bezüglich der angegebenen Masse variiert werden kann und den verschiedensten Beschichtungsbedingungen und Giesslösungskombinationen angepasst werden kann. Während jede einzelne Massnahme bereits weitgehende Verbesserungen bezüglich der Qualität der Beschichtung führt, ergibt eine Kombination sämtlicher Verbesserungen, wie beispielsweise Absaugen der abgeschnittenen Ränder, Absaugen der beim Messer gestauten Giesslösung sowie Vermeidung der durch die Oberflächenspannung bedingten Schichtdickenunterschiede sowie die Führung eines dünnen Flüssigkeitsfilms entlang der Seitenbegrenzungsplatten eine besonders stabile Beschichtung, deren Ränder keine Materialverluste oder Trocknungsprobleme mehr verursachen.It goes without saying that the inventive Device can be varied with respect to the specified mass can and the most diverse coating conditions and Casting solution combinations can be adjusted. While every single measure already extensive improvements with regard to the quality of the coating results in a Combination of all improvements, such as Vacuuming the cut edges, vacuuming the at Knife jammed pouring solution as well as avoiding the by the Differences in layer thickness due to surface tension and guiding a thin film of liquid along the Side boundary plates a particularly stable Coating, the edges of which do not lose material or Cause more drying problems.

Claims (6)

  1. Process for curtain coating a moving substrate with a liquid coating material, more particularly with photographic emulsions, a lateral flow (10) being supplied on both sides of the curtain (6) which is guided by lateral guides (7), and the width of the curtain being greater than the width of the coating on the substrate, and both sides of the curtain being cut by means of cutters (15) whose front edge (16) includes an acute angle (α) with respect to the inner side of the lateral guide, characterised in that in order to prevent the formation of a marginal bead, the portions of the coating solution which are stemmed by the front edge of the cutter are extracted perpendicularly to the longitudinal extension of the curtain through openings (20) of the cutter.
  2. Process according to claim 1, characterised in that the cut side portions of the curtain (6) and of the lateral flow (10) are extracted by means of an extracting slit (18) of the cutter (15) and an extracting channel (19).
  3. Apparatus for carrying out the process according to claim 1, comprising two lateral guides (7) for the curtain (6) and a respective cutter (15) disposed at the lower end of the lateral guides (7) and whose front edge (16) includes an acute angle (α) with respect to the inner side of the lateral guide, characterised in that an extracting slit (20) extending perpendicularly to the longitudinal extension of the curtain and connected to an extracting channel (21) is disposed at the lower edge of the cutter (15).
  4. Apparatus according to claim 3, characterised in that an extracting slit (18) is disposed at the junction between the upper side (17) of each cutter (15) and the lateral guide (7), the extracting slit being connected to an extracting channel (19) in order to extract the cut side portions of the curtain (6) and of the lateral flow (10).
  5. Apparatus according to claim 4, characterised in that the height of the extracting slit (18) on the upper side of each cutter is comprised between 0.05 and 0.5 mm.
  6. Apparatus according to one of claims 3 to 5, characterised in that the extracting slit (18) on the upper side (17) of each cutter (15) and/or the extracting slit (20) at the lower edge (21) of the cutter is provided with a water flushing system.
EP98100164A 1995-04-26 1995-04-26 Process and apparatus for curtain-coating a moving substrate Revoked EP0841588B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE59510277T DE59510277D1 (en) 1995-04-26 1995-04-26 Method and device for curtain coating of a moving support
EP98100164A EP0841588B1 (en) 1995-04-26 1995-04-26 Process and apparatus for curtain-coating a moving substrate

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP19950810277 EP0740197B1 (en) 1995-04-26 1995-04-26 Process and apparatus for curtain-coating a moving substrate
EP98100164A EP0841588B1 (en) 1995-04-26 1995-04-26 Process and apparatus for curtain-coating a moving substrate

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP19950810277 Division EP0740197B1 (en) 1995-04-26 1995-04-26 Process and apparatus for curtain-coating a moving substrate

Publications (3)

Publication Number Publication Date
EP0841588A2 EP0841588A2 (en) 1998-05-13
EP0841588A3 EP0841588A3 (en) 1998-07-08
EP0841588B1 true EP0841588B1 (en) 2002-07-10

Family

ID=8221736

Family Applications (3)

Application Number Title Priority Date Filing Date
EP98100164A Revoked EP0841588B1 (en) 1995-04-26 1995-04-26 Process and apparatus for curtain-coating a moving substrate
EP98100165A Expired - Lifetime EP0841589B1 (en) 1995-04-26 1995-04-26 Process and apparatus for curtain-coating of a moving substrate
EP19950810277 Expired - Lifetime EP0740197B1 (en) 1995-04-26 1995-04-26 Process and apparatus for curtain-coating a moving substrate

Family Applications After (2)

Application Number Title Priority Date Filing Date
EP98100165A Expired - Lifetime EP0841589B1 (en) 1995-04-26 1995-04-26 Process and apparatus for curtain-coating of a moving substrate
EP19950810277 Expired - Lifetime EP0740197B1 (en) 1995-04-26 1995-04-26 Process and apparatus for curtain-coating a moving substrate

Country Status (2)

Country Link
EP (3) EP0841588B1 (en)
DE (1) DE59506354D1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006079678A1 (en) * 2005-01-27 2006-08-03 Metso Paper, Inc. Apparatus for regulating the application width of a slide-fed curtain coater
DE102012004875B3 (en) * 2012-03-10 2012-07-19 Andritz Küsters Gmbh Device for curtain coating current material web e.g. paper web, has guide comprising suction apparatus with suction channel, and nozzle provided at channel, where steam at rear side of suction slot is injected into channel via nozzle

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5763013A (en) * 1997-02-05 1998-06-09 Eastman Kodak Company Edge removal apparatus including air-flow blocking means for curtain coating
US5725910A (en) * 1997-02-05 1998-03-10 Eastman Kodak Company Edge removal apparatus for curtain coating
EP0907103B1 (en) * 1997-10-03 2000-08-09 Troller Schweizer Engineering AG Process and apparatus for curtain coating a moving substrate
US6887312B1 (en) 2001-03-06 2005-05-03 Voith Paper Patent Gmbh Applicator
DE10110633A1 (en) * 2001-03-06 2002-09-19 Voith Paper Patent Gmbh applicator
DE10117668A1 (en) * 2001-04-09 2002-10-10 Bachofen & Meier Ag Buelach Device for coating a running material web
US7169445B2 (en) 2001-12-13 2007-01-30 Dow Global Technologies Inc. Method and apparatus for curtain coating
US6982003B2 (en) * 2001-12-13 2006-01-03 Dow Global Technologies Inc. Method and apparatus for curtain coating
ATE354443T1 (en) 2002-09-10 2007-03-15 Ilford Imaging Ch Gmbh METHOD AND DEVICE FOR CURTAIN COATING A MOVING SUPPORT
DE102006060954A1 (en) * 2006-12-20 2008-06-26 Inatec Gmbh A lamination method and apparatus for applying a film of an adhesive composition to a sheet substrate
FI121189B (en) * 2007-10-17 2010-08-13 Metso Paper Inc Edge Guide and Method for Extending the Life of Curtain Edge Edge Guide
JP2009101321A (en) * 2007-10-25 2009-05-14 Voith Patent Gmbh Coating width adjustment device
JP2009136751A (en) * 2007-12-05 2009-06-25 Voith Patent Gmbh Curtain coater
JP5228227B2 (en) * 2007-12-05 2013-07-03 ボイス パテント ゲーエムベーハー Curtain coater edge guide
FI120885B (en) * 2008-11-20 2010-04-15 Metso Paper Inc Kantstyrare
JP5605098B2 (en) * 2009-09-08 2014-10-15 株式会社リコー Curtain coating apparatus and curtain coating method
DE102010042291A1 (en) * 2010-10-11 2012-04-12 Fmp Technology Gmbh Fluid Measurements & Projects Device for curtain coating of carrier, has liquid layer and slot nozzle tool for producing curtain formed from liquid layer
CN104549797B (en) * 2013-10-28 2017-01-18 沈阳芯源微电子设备有限公司 Liquid spraying device with cleaning component
DE102014013996A1 (en) 2014-09-25 2016-03-31 Andritz Küsters Gmbh Method and apparatus for curtain coating

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3037612A1 (en) * 1980-10-04 1982-05-13 Agfa-Gevaert Ag, 5090 Leverkusen Photographic solution pouring device - has edge strips with low perpendicular surfaces followed by surfaces sloping upwards
DE3241831A1 (en) * 1982-11-12 1984-05-17 Agfa-Gevaert Ag, 5090 Leverkusen Process and apparatus for producing the width or strip width of coatings on lengths of material
JPS6049949U (en) * 1983-09-12 1985-04-08 富士写真フイルム株式会社 suction nozzle
JPS6157265A (en) * 1984-08-30 1986-03-24 Konishiroku Photo Ind Co Ltd Apparatus and method for removing thickened part made by coating solution
JPS63287575A (en) * 1987-05-19 1988-11-24 Fuji Photo Film Co Ltd Coating equipment
US4830887A (en) * 1988-04-22 1989-05-16 Eastman Kodak Company Curtain coating method and apparatus
BR9203828A (en) * 1991-10-11 1993-06-15 Eastman Kodak Co APPLIANCE AND PROCESS TO COVER A MOVING SUPPORT BY CURTAIN, WITH ONE OR MORE COATINGS OF COVERAGE LIQUID
DE4223463A1 (en) * 1992-07-16 1994-01-20 Bayer Ag Cosmetic care product against light-induced skin aging
US5328726A (en) * 1992-11-19 1994-07-12 Eastman Kodak Company Curtain coating method and apparatus using dual wire edge guides
EP0606038B1 (en) * 1993-01-07 1999-08-18 Eastman Kodak Company Edge removal apparatus for curtain coating

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006079678A1 (en) * 2005-01-27 2006-08-03 Metso Paper, Inc. Apparatus for regulating the application width of a slide-fed curtain coater
DE102012004875B3 (en) * 2012-03-10 2012-07-19 Andritz Küsters Gmbh Device for curtain coating current material web e.g. paper web, has guide comprising suction apparatus with suction channel, and nozzle provided at channel, where steam at rear side of suction slot is injected into channel via nozzle

Also Published As

Publication number Publication date
EP0841588A3 (en) 1998-07-08
EP0841589B1 (en) 2001-08-08
EP0740197B1 (en) 1999-07-07
EP0740197A1 (en) 1996-10-30
EP0841588A2 (en) 1998-05-13
EP0841589A3 (en) 1998-07-08
EP0841589A2 (en) 1998-05-13
DE59506354D1 (en) 1999-08-12

Similar Documents

Publication Publication Date Title
EP0841588B1 (en) Process and apparatus for curtain-coating a moving substrate
EP0737521A2 (en) Method and device for reducing disturbances in curtain-coating
DE60204240T2 (en) CURTAIN COATING PROCESS AND DEVICE
DE3336552C2 (en) Coating device for coating moving webs of material
DE8017072U1 (en) CLEANING HEAD FOR CLEANING PLANE SURFACES
DE2452784B2 (en) Method and apparatus for continuously coating a strip of material, for example a paper web
DE1652329A1 (en) Method and device for applying a liquid to a surface
DE3241831C2 (en)
DE2927137A1 (en) DEVICES FOR STRIPING MOISTURE FROM A RUNNING FILM STRIP
EP0408704A1 (en) Arrangement for applying substances to a web of material.
DE3907846B4 (en) Coating apparatus and method for applying a coating medium to a continuous flexible carrier
DE4334641C2 (en) Flushing fountain for the edge limitation device of a paper machine
DE2857330C2 (en)
DE3037612A1 (en) Photographic solution pouring device - has edge strips with low perpendicular surfaces followed by surfaces sloping upwards
DE2828580C3 (en) Liquid application device
EP0281520B1 (en) Separation element for trimming the width of a falling curtain
DE2820249C3 (en) Apparatus for applying a coating liquid to a moving web
DE3229368C1 (en) Longitudinal-cutting device for paper webs
DE3507936C2 (en) Process for removing films of superplasticizer adhering to a belt moved in translation and device for carrying out the process
DE19782108B4 (en) Process for removing dust in the cutting section of a cellulose drying machine and device for carrying out the process
EP2017012A2 (en) Curtain coating machine
DE3413912A1 (en) METHOD AND DEVICE FOR SLITING A BREAD PRODUCT
DE876194C (en) High pressure headbox paper machine and method of operating the same
DE2509020C3 (en) Device for severing a paper web from the fourdrinier wire of a papermaking machine
DE2603669A1 (en) DEVICE FOR CLEANING WINDOWS AND THE LIKE

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

AC Divisional application: reference to earlier application

Ref document number: 740197

Country of ref document: EP

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): BE CH DE FR GB LI NL

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): BE CH DE FR GB LI NL

17P Request for examination filed

Effective date: 19980825

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

Owner name: ILFORD IMAGING SWITZERLAND GMBH

17Q First examination report despatched

Effective date: 19990525

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

DAX Request for extension of the european patent (deleted)
AC Divisional application: reference to earlier application

Ref document number: 740197

Country of ref document: EP

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE CH DE FR GB LI NL

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: AMMANN PATENTANWAELTE AG BERN

REF Corresponds to:

Ref document number: 59510277

Country of ref document: DE

Date of ref document: 20020814

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20020822

ET Fr: translation filed
PLBQ Unpublished change to opponent data

Free format text: ORIGINAL CODE: EPIDOS OPPO

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: BACHOFEN+MEIER AG

Effective date: 20030407

PLBF Reply of patent proprietor to notice(s) of opposition

Free format text: ORIGINAL CODE: EPIDOS OBSO

NLR1 Nl: opposition has been filed with the epo

Opponent name: BACHOFEN+MEIER AG

PLAX Notice of opposition and request to file observation + time limit sent

Free format text: ORIGINAL CODE: EPIDOSNOBS2

PLAX Notice of opposition and request to file observation + time limit sent

Free format text: ORIGINAL CODE: EPIDOSNOBS2

PLBB Reply of patent proprietor to notice(s) of opposition received

Free format text: ORIGINAL CODE: EPIDOSNOBS3

PLBQ Unpublished change to opponent data

Free format text: ORIGINAL CODE: EPIDOS OPPO

PLAB Opposition data, opponent's data or that of the opponent's representative modified

Free format text: ORIGINAL CODE: 0009299OPPO

R26 Opposition filed (corrected)

Opponent name: BACHOFEN+MEIER AG

Effective date: 20030407

NLR1 Nl: opposition has been filed with the epo

Opponent name: BACHOFEN+MEIER AG

RDAF Communication despatched that patent is revoked

Free format text: ORIGINAL CODE: EPIDOSNREV1

APBP Date of receipt of notice of appeal recorded

Free format text: ORIGINAL CODE: EPIDOSNNOA2O

APAH Appeal reference modified

Free format text: ORIGINAL CODE: EPIDOSCREFNO

APBQ Date of receipt of statement of grounds of appeal recorded

Free format text: ORIGINAL CODE: EPIDOSNNOA3O

PLAB Opposition data, opponent's data or that of the opponent's representative modified

Free format text: ORIGINAL CODE: 0009299OPPO

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

Ref country code: NL

Payment date: 20080319

Year of fee payment: 14

APBU Appeal procedure closed

Free format text: ORIGINAL CODE: EPIDOSNNOA9O

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

Ref country code: DE

Payment date: 20090422

Year of fee payment: 15

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

Ref country code: BE

Payment date: 20090528

Year of fee payment: 15

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

Ref country code: CH

Payment date: 20090417

Year of fee payment: 15

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

Ref country code: GB

Payment date: 20090421

Year of fee payment: 15

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20091101

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20091231

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

Ref country code: NL

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

Effective date: 20091101

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

Ref country code: FR

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

Effective date: 20091222

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

Ref country code: FR

Payment date: 20080423

Year of fee payment: 14

RDAG Patent revoked

Free format text: ORIGINAL CODE: 0009271

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

Free format text: STATUS: PATENT REVOKED

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

27W Patent revoked

Effective date: 20090408

GBPR Gb: patent revoked under art. 102 of the ep convention designating the uk as contracting state

Effective date: 20090408

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

Ref country code: LI

Free format text: LAPSE BECAUSE OF THE APPLICANT RENOUNCES

Effective date: 20020710

Ref country code: CH

Free format text: LAPSE BECAUSE OF THE APPLICANT RENOUNCES

Effective date: 20020710