EP0704752B1 - Process and apparatus for curtain-coating a moving substrate. - Google Patents

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

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Publication number
EP0704752B1
EP0704752B1 EP94810560A EP94810560A EP0704752B1 EP 0704752 B1 EP0704752 B1 EP 0704752B1 EP 94810560 A EP94810560 A EP 94810560A EP 94810560 A EP94810560 A EP 94810560A EP 0704752 B1 EP0704752 B1 EP 0704752B1
Authority
EP
European Patent Office
Prior art keywords
curtain
substrate
pouring
opening
air
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
EP94810560A
Other languages
German (de)
French (fr)
Other versions
EP0704752A1 (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
Application filed by Ilford Imaging Switzerland GmbH filed Critical Ilford Imaging Switzerland GmbH
Priority to DE59409768T priority Critical patent/DE59409768D1/en
Priority to EP94810560A priority patent/EP0704752B1/en
Priority to JP24955595A priority patent/JP3681443B2/en
Priority to US08/534,842 priority patent/US5624715A/en
Publication of EP0704752A1 publication Critical patent/EP0704752A1/en
Application granted granted Critical
Publication of EP0704752B1 publication Critical patent/EP0704752B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • 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
    • 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 present invention relates to a method and a device for coating a moving curtain Carrier with a liquid coating material.
  • a liquid coating material especially when the width of the Machines and high speed result in a large number of problems to close the liquid curtain stabilize and as evenly as possible on the surface bring to.
  • One of these problems is that the free falling liquid film to the front, i.e. in the direction of the moving carrier is deformed. This deviation from the vertical direction of fall is made with the Carrier moving air boundary layer.
  • Figure 1 shows the essential part of the invention Coating plant in section with a schematic illustrated pourer 1, which opens into a pouring lip 2, of which the liquid film 3, in the following curtain called, falls freely towards the casting roll 4, on the schematically the carrier 5 is recorded, which is in Moved in the direction of the arrow, see also Figure 2.
  • the curtain is delimited on both sides by side guides 6.
  • the thickness c of the boundary layer 25, which on the The curtain bounces minimized.
  • Distance a squeegee / carrier see Figure 2
  • keeps very small for example 0.1-1.0 mm, preferably 0.1-0.5 mm and the distance b squeegee / dynamic wetting line to 5 - 30 mm, preferably 10 - 20 mm, can be entered a residual air volume and the formation of the boundary layer cannot be avoided entirely.
  • the area in front of the curtain is defined by the bottom 9 the pouring lip 2, below through the carrier 5, opposite the Curtain through the front 8 of the squeegee, and on both sides limited by the side guides 6 and therefore arises as a practically closed room 10. Without special Measures would be taken by the air boundary layer 11 along the falling curtain, see Figure 2, rotating air vortices 12 arise that are divided into individual unstable cells can divide. This will make the flow of the curtain disturbed and restless, leading to a diminished Baste quality leads.
  • the air supply opening 22 opens at the Bottom 9 of the pouring lip 2, so that there with air arriving at low speed down distracted and finally from the squeegee, or its Slot 17 is suctioned off.
  • a very uniform Flow is generated, with the supplied air is preferably preheated.
  • the appropriate Settings of the supplied and extracted air volume can the line of impact of the curtain on the support that dynamic wetting line 26, at the desired location can be set. Since the squeegee, as above explained for a stabilization of the dynamic Wetting line is ensured by a combination of described measures a uniform coating achieved.
  • the air extraction and Feeders combined into one unit and to be controlled.

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

Description

Die vorliegende Erfindung bezieht sich auf ein Verfahren und eine Vorrichtung zur Vorhangbeschichtung eines bewegten Trägers mit einem flüssigen Beschichtungsmaterial. Bei der Vorhangbeschichtung, insbesondere bei grosser Breite der Maschinen und grosser Geschwindigkeit ergeben sich eine grosse Anzahl von Problemen, um den Flüssigkeitsvorhang zu stabilisieren und möglichst gleichmässig auf die Unterlage zu bringen. Eines dieser Probleme besteht darin, dass der frei fallende Flüssigkeitsfilm nach vorne, d.h. in Richtung des bewegten Trägers deformiert wird. Diese Abweichung von der senkrechten Fallrichtung erfolgt durch die mit dem Träger mitlaufende Luftgrenzschicht.The present invention relates to a method and a device for coating a moving curtain Carrier with a liquid coating material. In the Curtain coating, especially when the width of the Machines and high speed result in a large number of problems to close the liquid curtain stabilize and as evenly as possible on the surface bring to. One of these problems is that the free falling liquid film to the front, i.e. in the direction of the moving carrier is deformed. This deviation from the vertical direction of fall is made with the Carrier moving air boundary layer.

Es sind verschiedene Verfahren und Vorrichtungen bekannt, um den Flüssigkeitsvorhang in dieser Beziehung zu stabilisieren. So ist, unter anderem, aus der EP-A-0 489 978 eine Vorrichtung zur Beschichtung bekannt, die ein Luftschild aufweist, das, in Richtung des bewegten Trägers gesehen, vor dem Flüssigkeitsfilm angebracht ist und eine Oeffnung aufweist, aus der die im Schild gestaute Luft abgesaugt wird. Durch die Verwendung eines Schildes wird der Abstand zwischen der Absaugstelle und dem Vorhang recht gross, wodurch sich die Wirksamkeit der Anordnung verringert. Ausserdem ist aus der EP-A-0 551 237 ein Verfahren und eine Vorrichtung zur Vorhangbeschichtung bekannt, in dem versucht wird, die sich vor dem Vorhang befindliche Luft dadurch zu stabilisieren, dass der im Raum vor dem Giessvorhang herrschende Luftdruck gemessen wird, um, ausgehend von einem Sollwert, Luft entweder zu- oder abzuführen. Eine genaue Kontrolle erfordert jedoch einen hohen apparativen Aufwand, um über die ganze Breite der Maschine einen gleichmässigen Luftdruck zu erhalten. Various methods and devices are known to the liquid curtain in this regard too stabilize. This is, among others, from EP-A-0 489 978 a device for coating known Air shield has that, towards the moving carrier seen before the liquid film is attached and a Opening, from which the air stowed in the shield is suctioned off. By using a shield the distance between the suction point and the curtain right large, which increases the effectiveness of the arrangement decreased. In addition, from EP-A-0 551 237 Method and device for curtain coating known in which attempts are made to be in front of the curtain to stabilize the air in that the in Air pressure prevailing in the space in front of the curtain is, in order, based on a setpoint, either air or dissipate. However, close control is required a high level of equipment in order to cover the entire width the machine to maintain an even air pressure.

Es ist von diesem Stand der Technik ausgehend Aufgabe der vorliegenden Erfindung ein Verfahren und eine Vorrichtung zur Vorhangbeschichtung anzugeben, mit denen der Einfluss der vom bewegten Träger mitgeführten Luft stark vermindert werden kann. Diese Aufgabe wird mit dem in Patentanspruch 1 definierten Verfahren gelöst. In einer Weiterausbildung des Verfahrens wird der Giessvorhang zusätzlich stabilisiert, indem dem Raum vor dem Giessvorhang kontrolliert Luft zu-und wieder abgeführt wird.Starting from this prior art, it is the task of present invention a method and an apparatus to specify the curtain coating with which the influence the air carried by the moving carrier is greatly reduced can be. This object is achieved with the in claim 1 defined procedures solved. In a further training of the Process, the curtain is additionally stabilized, by controlling the air in front of the pouring curtain is discharged again.

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

Fig. 1
zeigt schematisch einen Schnitt durch eine Vorhangsbeschichtungsanlage und
Fig. 2
zeigt eine Ausschnittsvergrösserung von Fig. 1.
The invention is explained below with reference to a drawing of an embodiment.
Fig. 1
shows schematically a section through a curtain coating system and
Fig. 2
shows an enlarged detail of FIG. 1.

Figur 1 zeigt den erfindungswesentlichen Teil einer Beschichtungsanlage im Schnitt mit einem schematisch dargestellten Giesser 1, der in eine Giesserlippe 2 mündet, von welcher der Flüssigkeitsfilm 3, im folgenden Vorhang genannt, frei in Richtung Giesswalze 4 fällt, auf der schematisch der Träger 5 aufgezeichnet ist, der sich in Richtung des Pfeiles bewegt, siehe auch Figur 2. Der Vorhang wird beidseitig durch Seitenführungen 6 begrenzt.Figure 1 shows the essential part of the invention Coating plant in section with a schematic illustrated pourer 1, which opens into a pouring lip 2, of which the liquid film 3, in the following curtain called, falls freely towards the casting roll 4, on the schematically the carrier 5 is recorded, which is in Moved in the direction of the arrow, see also Figure 2. The The curtain is delimited on both sides by side guides 6.

Vor dem Vorhang, in einem Abstand b, siehe Figur 2, ist ein Rakel 7 angeordnet, dessen zum Vorhang gerichtete Vorderfront 8 in diesem Beispiel nicht parallel zum Vorhang angeordnet ist, sondern nach oben hin einen etwas grösseren Abstand aufweist als bei der Giesswalze. Bei einer Maschinenbreite von ca. 1,5 m stellen sich hohe Anforderungen an die Biegesteifigkeit der beiden Elemente Giesswalze und Rakel. Das Rakel muss deshalb als Träger mit einer genügenden Höhe und damit hohem Flächenträgheitsmoment ausgebildet werden. Aus den Figuren 1 oder 2 geht hervor, dass das Rakel auf der Giesswalzenseite 13 etwa parallel zur Oberfläche der Giesswalze, respektive des Trägers geformt ist und in einen Unterteil 14 übergeht, der etwa rechtwinklig zur Giesswalzenoberfläche verläuft. Die hintere Fläche 15 des Rakels verläuft parallel zur Frontseite der Basis 16 bzw. zu den einzelnen Giesserplatten des Giessers 1.In front of the curtain, at a distance b, see Figure 2, is a Squeegee 7 arranged, its directed towards the curtain Front 8 in this example is not parallel to the curtain is arranged, but upwards a little larger Has a distance than with the casting roller. At a Machine width of approx. 1.5 m are high Flexural rigidity requirements of the two elements Casting roller and squeegee. The squeegee must therefore be carried as a carrier a sufficient height and therefore high Area moment of inertia are formed. From the figures 1 or 2 shows that the squeegee on the Casting roller side 13 approximately parallel to the surface of the Casting roller, or the carrier is formed and in one Lower part 14 merges, which is approximately at right angles to Casting roll surface runs. The rear surface 15 of the Doctor blade runs parallel to the front of the base 16 or to the individual foundry plates of the foundry 1.

Die mit dem Träger mitlaufende Luft, dargestellt als Grenzschicht 25, siehe Figur 2, wird beim Auftreffen des Vorhanges im Bereich der dynamischen Benetzungslinie 26 durch den auftreffenden Flüssigkeitsfilm vollständig zurückgehalten. Dieser Vorgang kann Störungen erzeugen, z.B. Deformationen im Vorhang die zu einer verminderten Begussqualität führen. Mit dem Rakel wird ein möglichst grosser Anteil der mitgeführten Luft von der dynamischen Auftrefflinie 26 ferngehalten, wobei diese Störungen durch folgende Massnahmen weiter reduziert werden können:

  • a) Abstand a Rakel/Träger klein halten und
  • b) Abstand b Rakel/dynamische Benetzungslinie des Vorhanges ebenfalls klein halten.
    • The air traveling with the carrier, shown as boundary layer 25, see FIG. 2, is completely retained by the impinging liquid film when the curtain strikes in the region of the dynamic wetting line 26. This process can produce disturbances, for example deformations in the curtain which lead to a reduced quality of the casting. The squeegee keeps as large a portion of the air as possible away from the dynamic impact line 26, whereby these disturbances can be further reduced by the following measures:
  • a) Keep the distance a squeegee / carrier small and
  • b) Also keep the distance b squeegee / dynamic wetting line of the curtain small.

    • Dadurch wird die Dicke c der Grenzschicht 25, die auf den Vorhang aufprallt, minimalisiert. Doch selbst wenn man den Abstand a Rakel/Träger, siehe Figur 2, sehr klein hält, beispielsweise 0,1 - 1,0 mm, vorzugsweise 0,1 - 0,5 mm und den Abstand b Rakel/dynamische Benetzungslinie auf 5 - 30 mm, vorzugsweise 10 - 20 mm einstellt, kann das Eintragen einer Restluftmenge und die Neubildung der Grenzschicht nicht ganz vermieden werden.As a result, the thickness c of the boundary layer 25, which on the The curtain bounces, minimized. But even if you do that Distance a squeegee / carrier, see Figure 2, keeps very small, for example 0.1-1.0 mm, preferably 0.1-0.5 mm and the distance b squeegee / dynamic wetting line to 5 - 30 mm, preferably 10 - 20 mm, can be entered a residual air volume and the formation of the boundary layer cannot be avoided entirely.

    Um das Eintragen der Restluftmenge praktisch vollständig zu verhindern, ist auf der vollen Länge des Rakels ein Schlitz 17 angeordnet, dessen Mündung sich unmittelbar hinter der Vorderkante des Rakels befindet. Der Schlitz 17 ist über einen Kanal 18 mit einem Ventilator 19 verbunden, um die Restluftmenge bei der Rakelvorderkante abzusaugen. Durch diese Massnahme kann eine wesentliche Beruhigung des Vorhanges beim Auftreffen auf den bewegten Träger erzielt werden, wodurch eine Beseitigung oder starke Verminderung der dort vorherrschenden Vorhangdeformation erzielt wird.To enter the amount of residual air practically completely prevent is a slot along the full length of the squeegee 17 arranged, the mouth of which is immediately behind the Leading edge of the squeegee. The slot 17 is over a duct 18 connected to a fan 19 to the Extract residual air from the front edge of the squeegee. By this measure can significantly calm the Curtain achieved when hitting the moving support be eliminating or greatly reducing of the curtain deformation prevailing there.

    Das Gebiet vor dem Vorhang wird oben durch die Unterseite 9 der Giesserlippe 2, unten durch den Träger 5, gegenüber dem Vorhang durch die Frontseite 8 des Rakels, und beidseitig durch die Seitenführungen 6 begrenzt und stellt sich daher als praktisch geschlossener Raum 10 dar. Ohne besondere Massnahmen würden durch die Luftgrenzschicht 11 entlang des fallenden Vorhanges, siehe Figur 2, rotierende Luftwirbel 12 entstehen, die sich in einzelne instabile Zellen aufteilen können. Dadurch wird der Fluss des Vorhanges gestört und unruhig, was zu einer verminderten Begussqualität führt.The area in front of the curtain is defined by the bottom 9 the pouring lip 2, below through the carrier 5, opposite the Curtain through the front 8 of the squeegee, and on both sides limited by the side guides 6 and therefore arises as a practically closed room 10. Without special Measures would be taken by the air boundary layer 11 along the falling curtain, see Figure 2, rotating air vortices 12 arise that are divided into individual unstable cells can divide. This will make the flow of the curtain disturbed and restless, leading to a diminished Baste quality leads.

    Um die Entstehung von Luftwirbeln 12 zu verhindern, ist zwischen der hinteren Oberkante 20 des Rakels und der vordersten Giesserplatte 21 eine über die ganze Breite der Maschine verlaufende Oeffnung 22 vorgesehen, die mit einem zweiten Kanal 23 und mit einem zweiten Ventilator 24 verbunden ist. Die Luftzufuhr-Oeffnung 22 mündet bei der Unterseite 9 der Giesserlippe 2, so dass die dort mit geringer Geschwindigkeit ankommende Luft nach unten abgelenkt und schliesslich vom Saugrakel, bzw. dessen Schlitz 17 abgesaugt wird.To prevent the formation of air vortices 12 between the rear upper edge 20 of the squeegee and the foremost foundry plate 21 one over the entire width of the Machine extending opening 22 provided with a second duct 23 and with a second fan 24 connected is. The air supply opening 22 opens at the Bottom 9 of the pouring lip 2, so that there with air arriving at low speed down distracted and finally from the squeegee, or its Slot 17 is suctioned off.

    Durch verschiedene Massnahmen kann eine sehr gleichmässige Strömung erzeugt werden, wobei die zugeführte Luft vorzugsweise vorgewärmt wird. Mit den entsprechenden Einstellungen der zugeführten und der abgesaugten Luftmenge kann die Auftrefflinie des Vorhanges auf dem Träger, die dynamische Benetzungslinie 26, am gewünschten Ort eingestellt werden. Da das Saugrakel, wie weiter oben erläutert, für eine Stabilisierung der dynamischen Benetzungslinie sorgt, wird durch eine Kombination der beschriebenen Massnahmen eine gleichmässige Beschichtung erzielt. Dabei können die Luftabsaug- und Zufuhreinrichtungen zu einer Einheit zusammengefasst und gesteuert werden.Through various measures, a very uniform Flow is generated, with the supplied air is preferably preheated. With the appropriate Settings of the supplied and extracted air volume can the line of impact of the curtain on the support that dynamic wetting line 26, at the desired location can be set. Since the squeegee, as above explained for a stabilization of the dynamic Wetting line is ensured by a combination of described measures a uniform coating achieved. The air extraction and Feeders combined into one unit and to be controlled.

    Claims (8)

    1. Process for curtain coating a moving substrate with a liquid coating material, more particularly with photographic emulsions, the air carried along by the moving substrate being extracted in front of the curtain as seen in the moving direction of the substrate, characterised in that the extraction is effected by means of a slot (17) which extends across the entire length of the blade and whose opening is disposed immediately behind the front edge of the blade.
    2. Process according to claim 1, characterised in that the space (10) in front of the pouring curtain, as seen in the moving direction of the substrate (5), formed by the underside (9) of the pouring lip (2), the lateral guides (6), the moving substrate (5), and the front side (8) of the extracting device, is constantly supplied from the pouring lip with a controlled amount of air which is extracted near the substrate.
    3. Process according to claim 2, characterised in that the supplied air is preheated.
    4. Process according to claim 2 or 3, characterised in that the amount of air supplied and extracted is controlled in order to adjust the location of the dynamic wetting line of the curtain on the substrate.
    5. Device for carrying out the process according to claim 1, comprising a pourer (1) including a pouring lip (2) and a pouring roll (4) carrying a substrate (5), characterised in that the device comprises an extracting device which is disposed in front of the curtain and includes an extracting blade (7) whose front edge facing the curtain (3) is provided with a slot (17) which extends across the width of the substrate and is connected to a vacuum installation, the opening of the slot (17) being located near the surface of the substrate (5) and the dynamic wetting line (26) of the curtain (3).
    6. Device according to claim 5, characterised in that the distance a between the opening of the slot (17) and the surface of the substrate on the pouring roll is comprised between 0.1 and 1.0 mm, preferably between 0.1 and 0.5 mm, and the distance b between the opening of the slot (17) and the dynamic wetting line (26) is comprised between 5 and 30 mm, preferably between 10 and 20 mm.
    7. Device according to claim 5 for carrying out the process according to claim 1, comprising a pourer (1) formed of the pouring plate (21) and including a pouring lip (2) and a pouring roll (4) carrying a substrate (5), characterised in that an opening (22) extending in parallel to the curtain (3) and underneath the pouring lip (2) is provided near the foremost pouring plate (21), the opening being connected to an air supply device.
    8. Device according to any one of claims 5 to 9, characterised in that the opening (22) is formed by a gap between the rear surface (15) of the extracting blade (17), facing away from the curtain, and the front side of the foremost pouring plate (21).
    EP94810560A 1994-09-27 1994-09-27 Process and apparatus for curtain-coating a moving substrate. Expired - Lifetime EP0704752B1 (en)

    Priority Applications (4)

    Application Number Priority Date Filing Date Title
    DE59409768T DE59409768D1 (en) 1994-09-27 1994-09-27 Method and device for curtain coating of a moving support
    EP94810560A EP0704752B1 (en) 1994-09-27 1994-09-27 Process and apparatus for curtain-coating a moving substrate.
    JP24955595A JP3681443B2 (en) 1994-09-27 1995-09-27 Method and apparatus for curtain-like coating on moving support
    US08/534,842 US5624715A (en) 1994-09-27 1995-09-27 Method and apparatus for curtain coating a moving support

    Applications Claiming Priority (1)

    Application Number Priority Date Filing Date Title
    EP94810560A EP0704752B1 (en) 1994-09-27 1994-09-27 Process and apparatus for curtain-coating a moving substrate.

    Publications (2)

    Publication Number Publication Date
    EP0704752A1 EP0704752A1 (en) 1996-04-03
    EP0704752B1 true EP0704752B1 (en) 2001-05-30

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    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP94810560A Expired - Lifetime EP0704752B1 (en) 1994-09-27 1994-09-27 Process and apparatus for curtain-coating a moving substrate.

    Country Status (4)

    Country Link
    US (1) US5624715A (en)
    EP (1) EP0704752B1 (en)
    JP (1) JP3681443B2 (en)
    DE (1) DE59409768D1 (en)

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    EP0489978B1 (en) * 1990-12-12 1996-03-20 Agfa-Gevaert N.V. Curtain coater
    US5206057A (en) * 1992-01-10 1993-04-27 Eastman Kodak Company Method and apparatus for adjusting the curtain impingement line in a curtain coating apparatus

    Cited By (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    CN104549797A (en) * 2013-10-28 2015-04-29 沈阳芯源微电子设备有限公司 Liquid spraying device with cleaning component
    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

    Also Published As

    Publication number Publication date
    JPH08173879A (en) 1996-07-09
    US5624715A (en) 1997-04-29
    JP3681443B2 (en) 2005-08-10
    EP0704752A1 (en) 1996-04-03
    DE59409768D1 (en) 2001-07-05

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