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EP0431431B1 - Doctoring device - Google Patents

Doctoring device Download PDF

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Publication number
EP0431431B1
EP0431431B1 EP90122497A EP90122497A EP0431431B1 EP 0431431 B1 EP0431431 B1 EP 0431431B1 EP 90122497 A EP90122497 A EP 90122497A EP 90122497 A EP90122497 A EP 90122497A EP 0431431 B1 EP0431431 B1 EP 0431431B1
Authority
EP
European Patent Office
Prior art keywords
doctoring
channel
spring leaf
doctoring device
oscillator
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
EP90122497A
Other languages
German (de)
French (fr)
Other versions
EP0431431A3 (en
EP0431431A2 (en
Inventor
Hans-Peter Dr. Sollinger
Zygmunt Madrzak
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.)
JM Voith GmbH
Original Assignee
JM Voith 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 JM Voith GmbH filed Critical JM Voith GmbH
Priority to AT90122497T priority Critical patent/ATE91243T1/en
Publication of EP0431431A2 publication Critical patent/EP0431431A2/en
Publication of EP0431431A3 publication Critical patent/EP0431431A3/en
Application granted granted Critical
Publication of EP0431431B1 publication Critical patent/EP0431431B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/02—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface
    • B05C11/04—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades
    • B05C11/041—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface ; Controlling means therefor; Control of the thickness of a coating by spreading or distributing liquids or other fluent materials already applied to the coated surface with blades characterised by means for positioning, loading, or deforming the blades
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
    • B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
    • B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
    • B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
    • 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
    • D21H25/00—After-treatment of paper not provided for in groups D21H17/00 - D21H23/00
    • D21H25/08—Rearranging applied substances, e.g. metering, smoothing; Removing excess material
    • D21H25/10—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with blades

Definitions

  • the invention relates to a doctor device according to the preamble of claim 1.
  • a doctor device is known from US-PS 43 69 731.
  • Fig. 1 the doctor device with 1 and the roller C is identified, the direction of movement of the surface of the roller is indicated by the thick arrow.
  • the squeegee device is located on a carrier 8, which has in its upper part a stop 6 for the leaf spring serving here as a doctor blade 2, which is shown here in dash-dotted lines because it should not be present in the cleaning state of the squeegee clamping shown.
  • the doctor blade is pressed against the stop 6 by means of the slide plate 5.
  • This slide plate 5 is provided in the upper part of a groove 3, which extends parallel to the stop 6 and the doctor blade 2.
  • the doctor blade is pressed by a pressure bar 12 against the counter roller C by means of a lifting device, of which only the lifting rod 14 and the fastening plate 15 are shown here.
  • An upper guide plate 13 is provided for guiding the pressure bar 12.
  • vibration pulse elements 7 In the side wall 19 opposite the stop 6 as the preferred location of the channel 3 there are a plurality of vibration pulse elements 7 in a row parallel to this.
  • the electrical connections for these are located in a channel 11 which also runs parallel to the channel 3.
  • the cables are indicated here at 16.
  • the vibration elements 7 are essentially flush with the side wall 19 of the channel 3 and are covered by a vibration plate (membrane) 9.
  • a vibration plate 9 can be provided for each vibration element 11.
  • These oscillation pulse exciters can preferably operate on a piezo-electric basis, in which case they are practically designed as small round cylinders which can be inserted and glued into corresponding cylindrical channels 18. In this case, vibration plates 9 may not be necessary at all.
  • vibration exciters e.g. Ultrasonic transmitter 7
  • a bar 20 which is displaceable parallel to the channel 3 and to move this bar back and forth during the cleaning process, so that the entire seating area of the coating blade is sonicated.
  • the knife gate valve 5 is withdrawn as shown and the channel 3 e.g. filled with water. If the vibration exciters are set into vibrations, preferably at an ultrasonic frequency, the dirt particles which have become lodged in the trough and in particular on the pressing edge of the knife gate valve 5 and the stop 6 are detached. You can flush them away by continuously pouring water into the channel. In order to keep the water in the channel, it is of course closed off at both ends, that is to say in the region of the two ends of the roller C, by closure plates. You can provide these closure plates with connections for the water. At least one of these end plates can also be designed as a flap, which seals by means of a rubber seal on the end channel wall.
  • cleaning is also possible during operation, i.e. while coating with an existing doctor blade. This could also be relatively useful, because it may not lead to larger attachments in the seating area of the coating blade.
  • doctor element be a doctor blade, but it can also serve as such a roller doctor guided in a doctor bed, which is held by a blade-like holder.
  • This blade-like holder e.g. a leaf spring can be fixed in a blade holder as shown.
  • FIG. 2 shows an arrangement with an oscillator 21, which is designed as a rod with a circular cross section, which is located along the entire longitudinal extent of the doctor channel 3 '. Its length also corresponds essentially to the length of the doctor blade or a leaf spring holding the doctor blade bed. Otherwise, similar components to those in FIG. 1 are identified in the figure with the same reference numerals but with an apostrophe.
  • the vibrator 21 is supported over its length by bearing blocks 22 made of a plastic, such as polyurethane. These points should preferably be located at the vibration nodes of the vibration of the rod, which is generated by a vibration exciter 27, 28, which is coupled to the end face and is mounted on a bracket 31. Rod 21 and vibration exciter can also perform a transverse movement, i.e.
  • a connection for the liquid, in particular water, is indicated as a pipe connection 25, the central opening of which continues via the space 24 and the channel 23 into the doctor channel 3 '.
  • Several such connections can be arranged distributed over the length of the doctor channel 3 '.
  • the oscillation frequencies can be between 20 and 80 kHz.
  • a vibration exciter can also be coupled to both ends of the rod-shaped vibrator.
  • An element 27 with magnetostriction which is connected to the oscillator 21 via a coupling piece 28 (so-called booster) for adjusting the amplitude, can be used as a vibration exciter.
  • Separation joints (not shown) with flange and connecting screws and / or gluing to both ends of the coupling piece can be provided.
  • a seal bushing for the vibrator is provided in the end wall 26 of the doctor channel 3 ', the seal 30 being pressed on by means of glasses 29.
  • the vibration exciter can also be fixed on the holding flange 32.
  • the vibration exciter is sold by Martin Walter, Ultrasoundtechnik GmbH, Erlenweg 14, Postfach 1246, D-7516 Karlsbad-Auerbach.

Landscapes

  • Coating Apparatus (AREA)
  • Cleaning In General (AREA)
  • Soil Working Implements (AREA)
  • Confectionery (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Cereal-Derived Products (AREA)
  • Glass Compositions (AREA)
  • Massaging Devices (AREA)
  • Polarising Elements (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
  • Accessories For Mixers (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Centrifugal Separators (AREA)
  • Eye Examination Apparatus (AREA)
  • Soy Sauces And Products Related Thereto (AREA)
  • Mechanical Treatment Of Semiconductor (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Peptides Or Proteins (AREA)
  • Saccharide Compounds (AREA)

Abstract

For the purpose of cleaning a doctoring device 1, a groove 3 is provided on the seat of a blade 2, which groove can be filled with fluid. Vibration pulse elements 7 are present which impact the fluid with ultrasonic frequency. As a result, deposits are cleaned from the seat of the blade. <IMAGE>

Description

Die Erfindung betrifft eine Rakeleinrichtung entsprechend dem Oberbegriff des Patentanspruchs 1. Eine solche Rakeleinrichtung ist bekannt aus der US-PS 43 69 731.The invention relates to a doctor device according to the preamble of claim 1. Such a doctor device is known from US-PS 43 69 731.

Bei diesen Einrichtungen ist es nicht zu verhindern, daß in dem Spalt, in welchem die Streichklinge gegen den sie festlegenden Anschlag gedrückt wird, sich Rückstandsteilchen der Streichmasse festsetzen und dort altern. Sie führen dazu, daß kein einwandfreier Sitz der Streichklinge in ihrer Einspannung mehr gegeben ist. Die Reinigungsmöglichkeiten des Sitzes der Streichklinge sind in solchen Fällen recht schlecht. Es hat sich eine Einrichtung eingebürgert, bei welcher die Streichklinge durch einen pneumatischen Druckschlauch eingespannt wird. Ein Beispiel dafür ist auch die genannte US-Patentschrift. Hierbei sind die Reinigungsmöglichkeiten natürlich noch schlechter. Es ist erwünscht, eine Reinigungsmöglichkeit vorzusehen, daß beim Klingenwechsel in sehr kurzer Zeit die Reinigung des Klingensitzes erfolgen kann.With these devices, it cannot be prevented that residue particles of the coating slip settle in the gap in which the coating blade is pressed against the stop defining it and age there. They result in the streak blade no longer being properly seated in its clamping. In such cases, the cleaning options for the seat of the coating blade are quite poor. A device has been established in which the doctor blade is clamped by a pneumatic pressure hose. An example of this is the aforementioned US patent. The cleaning options are of course even worse. It is desirable to provide a cleaning option so that the blade seat can be cleaned in a very short time when changing the blade.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des kennzeichnenden Teils des Patentanspruchs 1 gelöst.This object is achieved by the features of the characterizing part of patent claim 1.

Nachfolgend wird die Erfindung anhand zweier in der Zeichnung dargestellter Ausführungsbeispiele erläutert, wobei in

Fig.1 u.2
jeweils ein Querschnitt durch die Rakeleinrichtung und in
Fig. 3
eine Teilansicht und -Längsschnitt zu letzterer in verkleinertem Maßstab

dargestellt ist.The invention is explained below using two exemplary embodiments shown in the drawing, wherein in
Fig. 1 and 2
in each case a cross section through the doctor device and in
Fig. 3
a partial view and longitudinal section to the latter on a reduced scale

is shown.

In Fig. 1 ist die Rakeleinrichtung mit 1 und die Walze C gekennzeichnet, wobei die Bewegungsrichtung der Oberfläche der Walze durch den dicken Pfeil gekennzeichnet ist. Die Rakeleinrichtung befindet sich auf einem Träger 8, der in seinem oberen Teil einen Anschlag 6 für die hier als Streichklinge 2 dienende Blattfeder aufweist, die hier strichpunktiert dargestellt ist, weil sie bei dem dargestellten Reinigungszustand der Rakeleinspannung nicht vorhanden sein soll. Zum Betrieb wird die Streichklinge mittels der Schieberplatte 5 gegen den Anschlag 6 gepreßt. Diese Schieberplatte 5 ist in dem oberen Teil einer Rinne 3 vorgesehen, die sich parallel zum Anschlag 6 und zur Streichklinge 2 erstreckt.In Fig. 1, the doctor device with 1 and the roller C is identified, the direction of movement of the surface of the roller is indicated by the thick arrow. The squeegee device is located on a carrier 8, which has in its upper part a stop 6 for the leaf spring serving here as a doctor blade 2, which is shown here in dash-dotted lines because it should not be present in the cleaning state of the squeegee clamping shown. For operation, the doctor blade is pressed against the stop 6 by means of the slide plate 5. This slide plate 5 is provided in the upper part of a groove 3, which extends parallel to the stop 6 and the doctor blade 2.

Die Streichklinge wird durch eine Druckleiste 12 an die Gegenwalze C mittels einer Hubvorrichtung angepreßt, von der hier nur die Hubstange 14 und die Befestigungsplatte 15 dargestellt sind. Für die Führung der Druckleiste 12 ist eine obere Führungsplatte 13 vorgesehen.The doctor blade is pressed by a pressure bar 12 against the counter roller C by means of a lifting device, of which only the lifting rod 14 and the fastening plate 15 are shown here. An upper guide plate 13 is provided for guiding the pressure bar 12.

In der dem Anschlag 6 gegenüber befindlichen Seitenwand 19 als bevorzugtem Ort der Rinne 3 befinden sich in einer zu dieser parallelen Reihe mehrere Schwingungsimpulselemente 7. Die elektrischen Anschlüsse für diese befinden sich in einem Kanal 11, der ebenfalls parallel zur Rinne 3 verläuft. Die Kabel sind hier bei 16 angedeutet. Die Schwingungselemente 7 schließen hier im wesentlichen bündig mit der Seitenwand 19 der Rinne 3 ab und sind durch eine Schwingungsplatte (Membrane) 9 abgedeckt. Besteht z.B. ein Abstand zwischen den einzelnen Schwingungselementen 11 von etwa 20 cm, so kann man für jedes Schwingungselement 11 eine Schwingungsplatte 9 vorsehen. Diese Schwingungsimpulserreger können vorzugsweise auf piezo-elektrischer Basis arbeiten, in welchem Fall sie praktisch als kleine runde Zylinder ausgebildet sind, die in entsprechende zylindrische Kanäle 18 eingesteckt und eingeklebt werden können. Es sind dann u.U. gar keine Schwingungsplättchen 9 nötig.In the side wall 19 opposite the stop 6 as the preferred location of the channel 3 there are a plurality of vibration pulse elements 7 in a row parallel to this. The electrical connections for these are located in a channel 11 which also runs parallel to the channel 3. The cables are indicated here at 16. The vibration elements 7 are essentially flush with the side wall 19 of the channel 3 and are covered by a vibration plate (membrane) 9. For example, if there is a distance between the individual vibration elements 11 of approximately 20 cm, a vibration plate 9 can be provided for each vibration element 11. These oscillation pulse exciters can preferably operate on a piezo-electric basis, in which case they are practically designed as small round cylinders which can be inserted and glued into corresponding cylindrical channels 18. In this case, vibration plates 9 may not be necessary at all.

Es ist auch möglich, in einem größeren gegenseitigen Abstand die Schwingungserreger, z.B. Ultraschallsender 7, dafür aber in einer parallel zur Rinne 3 verschieblichen Leiste 20 anzuordnen und diese Leiste während des Reinigungsvorganges hin- und herzubewegen, so daß der gesamte Sitzbereich der Streichklinge beschallt wird.It is also possible to place the vibration exciters, e.g. Ultrasonic transmitter 7, but to be arranged in a bar 20 which is displaceable parallel to the channel 3 and to move this bar back and forth during the cleaning process, so that the entire seating area of the coating blade is sonicated.

Für den Reinigungsfall wird der Plattenschieber 5 wie dargestellt zurückgezogen und die Rinne 3 z.B. mit Wasser gefüllt. Werden nun die Schwingungserreger in Schwingungen versetzt, vorzugsweise mit Ultraschallfrequenz, so werden die Schmutzteilchen, die sich in der Rinne und insbesondere an der Preßkante des Plattenschiebers 5 und des Anschlages 6 festgesetzt haben, losgelöst. Man kann sie fortspülen, indem man fortlaufend Wasser in die Rinne eingibt. Um das Wasser in der Rinne zu halten, ist diese natürlich an beiden Enden, also im Bereich der beiden Enden der Walze C, durch Verschlußplatten abgeschlossen. Man kann diese Verschlußplatten mit Anschlüssen für das Wasser versehen. Man kann zumindest eine dieser Abschlußplatten auch als Klappe ausführen, welche mittels einer Gummidichtung an der stirnseitigen Rinnenwand abdichtet. Man kann diese Klappe ein wenig lüften, so daß das Reinigungswasser entsprechend der zugegebenen Überschußmenge kontinuierlich abfließen kann. Ist der Reinigungsvorgang beendet, wird kein Wasser mehr zugegeben, eventuell die Abschlußklappe völlig geöffnet, so daß das in der Rinne enthaltene Wasser einschließlich der darin enthaltenen Verunreinigungen abfließt.For cleaning purposes, the knife gate valve 5 is withdrawn as shown and the channel 3 e.g. filled with water. If the vibration exciters are set into vibrations, preferably at an ultrasonic frequency, the dirt particles which have become lodged in the trough and in particular on the pressing edge of the knife gate valve 5 and the stop 6 are detached. You can flush them away by continuously pouring water into the channel. In order to keep the water in the channel, it is of course closed off at both ends, that is to say in the region of the two ends of the roller C, by closure plates. You can provide these closure plates with connections for the water. At least one of these end plates can also be designed as a flap, which seals by means of a rubber seal on the end channel wall. You can vent this flap a little so that the cleaning water can flow off continuously in accordance with the excess amount added. When the cleaning process is finished, no more water is added, and the closing flap may be opened completely, so that the water contained in the channel, including the impurities contained therein, flows off.

Unter Umständen ist auch eine Reinigung während des Betriebes, also während des Streichens mit vorhandener Streichklinge möglich. Dies könnte auch relativ sinnvoll sein, weil es dadurch möglicherweise erst gar nicht zu größeren Ansetzungen im Sitzbereich der Streichklinge kommt.Under certain circumstances, cleaning is also possible during operation, i.e. while coating with an existing doctor blade. This could also be relatively useful, because it may not lead to larger attachments in the seating area of the coating blade.

Es ist nicht erforderlich, daß das Rakelelement eine Streichklinge ist, sondern es kann auch als solches eine in einem Rakelbett geführte Rollrakel dienen, welche von einem klingenähnlichen Halter gehalten wird. Auch dieser klingenähnliche Halter, z.B. eine Blattfeder, kann in einer wie dargestellt ausgeführten Klingenhalterung festgelegt werden.It is not necessary that the doctor element be a doctor blade, but it can also serve as such a roller doctor guided in a doctor bed, which is held by a blade-like holder. This blade-like holder, e.g. a leaf spring can be fixed in a blade holder as shown.

In Fig. 2 ist eine Anordnung mit einem Schwinger 21 dargestellt, der als ein Stab mit kreisförmigem Querschnitt ausgebildet ist, der sich entlang der gesamten Längserstreckung der Rakelrinne 3' befindet. Seine Länge entspricht also auch im wesentlichen der Länge der Streichklinge oder einer das Rollrakelbett haltenden Blattfeder. Ansonsten sind in der Figur ähnliche Bauteile wie in Fig. 1 mit jeweils dem gleichen Bezugszeichen, aber mit Apostroph versehen, gekennzeichnet. Hierbei ist der Schwinger 21 über seine Länge verteilt von Lagerböcken 22 aus einem Kunststoff, wie Polyurethan, unterstützt. Diese Stellen sollen sich vorzugsweise an den Schwingungsknoten der Schwingung des Stabes befinden, die durch einen stirnseitig an diesen angekoppelten, auf einer Konsole 31 gelagerten Schwingungserreger 27, 28 erzeugt wird. Stab 21 und Schwingungserreger können auch eine Transversalbewegung, d.h. in Längsrichtung der Blattfeder bzw. Rakelrinne 3' ausführen, so daß alle Stellen der Rakelrinne von den Schallwellen überstrichen werden. Ein Anschluß für die Flüssigkeit, insbesondere Wasser, ist als Rohranschluß 25 angedeutet, dessen zentrale Öffnung sich über den Raum 24 und Kanal 23 in die Rakelrinne 3' fortsetzt. Es können mehrere solcher Anschlüsse über die Länge der Rakelrinne 3' verteilt angeordnet sein.2 shows an arrangement with an oscillator 21, which is designed as a rod with a circular cross section, which is located along the entire longitudinal extent of the doctor channel 3 '. Its length also corresponds essentially to the length of the doctor blade or a leaf spring holding the doctor blade bed. Otherwise, similar components to those in FIG. 1 are identified in the figure with the same reference numerals but with an apostrophe. Here, the vibrator 21 is supported over its length by bearing blocks 22 made of a plastic, such as polyurethane. These points should preferably be located at the vibration nodes of the vibration of the rod, which is generated by a vibration exciter 27, 28, which is coupled to the end face and is mounted on a bracket 31. Rod 21 and vibration exciter can also perform a transverse movement, i.e. run in the longitudinal direction of the leaf spring or squeegee channel 3 ', so that all points of the squeegee channel are swept by the sound waves. A connection for the liquid, in particular water, is indicated as a pipe connection 25, the central opening of which continues via the space 24 and the channel 23 into the doctor channel 3 '. Several such connections can be arranged distributed over the length of the doctor channel 3 '.

Die Schwingungsfrequenzen können zwischen 20 und 80 kHz liegen. Es kann auch je ein Schwingungserreger an beiden Enden des stabförmigen Schwingers angekoppelt sein.The oscillation frequencies can be between 20 and 80 kHz. A vibration exciter can also be coupled to both ends of the rod-shaped vibrator.

Als Schwingungserreger kommt hier ein Element 27 mit Magnetostriktion in Frage, das über ein Kopplungsstück 28 (sogenannter Booster) zur Amplitudenanpassung mit dem Schwinger 21 verbunden ist. Es können nicht dargestellte Trennfugen mit Flansch und Verbindungsschrauben und/oder Verklebung zu beiden Enden des Kopplungsstücks vorgesehen sein. Eine Dichtungsdurchführung für den Schwinger ist in der Stirnwand 26 der Rakelrinne 3' vorgesehen, wobei die Dichtung 30 mittels Brille 29 angepreßt wird.Man kann den Schwingungserreger auch am Halteflansch 32 festlegen.An element 27 with magnetostriction, which is connected to the oscillator 21 via a coupling piece 28 (so-called booster) for adjusting the amplitude, can be used as a vibration exciter. Separation joints (not shown) with flange and connecting screws and / or gluing to both ends of the coupling piece can be provided. A seal bushing for the vibrator is provided in the end wall 26 of the doctor channel 3 ', the seal 30 being pressed on by means of glasses 29. The vibration exciter can also be fixed on the holding flange 32.

Die Schwingungserreger vertreibt die Firma Martin Walter, Ultraschalltechnik GmbH, Erlenweg 14, Postfach 1246, D-7516 Karlsbad-Auerbach.The vibration exciter is sold by Martin Walter, Ultrasoundtechnik GmbH, Erlenweg 14, Postfach 1246, D-7516 Karlsbad-Auerbach.

Claims (9)

  1. Doctoring device, comprising a seat for a spring leaf (2), which serves as a doctoring element and which is connected thereto and which is clamped in its area remote from the coating edge of the doctoring element by a clamping element (5, 5') which presses the spring leaf against a stop (6), characterised in that in the clamping area is provided a channel (3, 3'), which runs parallel with the aforementioned coating edge (3, 3'), at the seat of the spring leaf (2), and that either an array of oscillatory pulse generators (7), which extends along the channel (3), is arranged in a wall (19), which is remote of the spring leaf (2), of the channel (3), or that inside the channel (3') is positioned a rodshaped oscillator (21) of corresponding length, to which an oscillatory pulse generator (27) is connected on one or both ends.
  2. Doctoring device according to claim 1, characterised in that a plate slide (5, 5'), which is located substantially in the upper area of the channel (3, 3'), serves as a clamping element of the spring leaf (2).
  3. Doctoring device according to one of claims 1 or 2, characterised in that piezo elements or magnetostrictive elements with emitter frequencies between 20̸ and 80̸ kHz are provided as oscillatory pulse generators (7, 27),
  4. Doctoring device according to one of claims 1 to 3, characterised in that the oscillatory pulse generators (7) are arranged in ledge (20̸), which is movable to and fro parallel with the channel (3) and which is located opposite the stop (6).
  5. Doctoring device according to claim 4, characterised in that the oscillatory pulse generators (7) are covered by one or more oscillation sheets (9).
  6. Doctoring device according to one of claims 1 to 3, characterised in that the rodshaped oscillator (21) is made of a metal of highest elasticity module, such as titanium.
  7. Doctoring device according to one of claims 1 to 3 or 6, characterised in that the rodshaped oscillator (21) is movable to and fro in the direction of its longitudinal axis.
  8. Doctoring device according to one of claims 1 to 3, 6 or 7, characterised in that the rodshaped oscillator (21) is seated in at least a few locations of its oscillation nodes on mounts (22) which are made of a plastic material, such as polyurethane.
  9. Process for operating a coating device, characterised in that the seat of a coating blade or a doctoring holder is cleaned by means of a volume of liquid which is subjected to an ultra-sound frequency.
EP90122497A 1989-12-07 1990-11-26 Doctoring device Expired - Lifetime EP0431431B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90122497T ATE91243T1 (en) 1989-12-07 1990-11-26 SQUEEGEE DEVICE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3940450 1989-12-07
DE3940450A DE3940450A1 (en) 1989-12-07 1989-12-07 Squeegee device

Publications (3)

Publication Number Publication Date
EP0431431A2 EP0431431A2 (en) 1991-06-12
EP0431431A3 EP0431431A3 (en) 1991-11-27
EP0431431B1 true EP0431431B1 (en) 1993-07-07

Family

ID=6394982

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90122497A Expired - Lifetime EP0431431B1 (en) 1989-12-07 1990-11-26 Doctoring device

Country Status (10)

Country Link
US (1) US5136967A (en)
EP (1) EP0431431B1 (en)
JP (1) JP2920784B2 (en)
AT (1) ATE91243T1 (en)
BR (1) BR9006269A (en)
CA (1) CA2031705A1 (en)
DE (2) DE3940450A1 (en)
ES (1) ES2043221T3 (en)
FI (1) FI106102B (en)
NO (1) NO174659C (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69231762T2 (en) 1991-07-08 2001-07-26 Seiko Epson Corp., Tokio/Tokyo RISC PROCESSOR WITH EXTENDABLE ARCHITECTURE
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FI906027A0 (en) 1990-12-05
ES2043221T3 (en) 1993-12-16
CA2031705A1 (en) 1991-06-08
DE59001916D1 (en) 1993-08-12
NO174659C (en) 1994-06-15
EP0431431A3 (en) 1991-11-27
EP0431431A2 (en) 1991-06-12
NO174659B (en) 1994-03-07
NO905144D0 (en) 1990-11-28
ATE91243T1 (en) 1993-07-15
JP2920784B2 (en) 1999-07-19
NO905144L (en) 1991-06-10
BR9006269A (en) 1991-09-24
FI906027L (en) 1991-06-08
US5136967A (en) 1992-08-11
FI106102B (en) 2000-11-30
JPH03186378A (en) 1991-08-14
DE3940450A1 (en) 1991-06-13

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