EP0919665A2 - Apparatus for applying indirectly a liquid or pasty medium onto a moving web, in particular of paper of board - Google Patents

Apparatus for applying indirectly a liquid or pasty medium onto a moving web, in particular of paper of board Download PDF

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Publication number
EP0919665A2
EP0919665A2 EP98114277A EP98114277A EP0919665A2 EP 0919665 A2 EP0919665 A2 EP 0919665A2 EP 98114277 A EP98114277 A EP 98114277A EP 98114277 A EP98114277 A EP 98114277A EP 0919665 A2 EP0919665 A2 EP 0919665A2
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EP
European Patent Office
Prior art keywords
leveling
material web
web
transfer
spreader
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.)
Granted
Application number
EP98114277A
Other languages
German (de)
French (fr)
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EP0919665B1 (en
EP0919665A3 (en
Inventor
Michael Trefz
Roland Seiz
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Voith Patent GmbH
Original Assignee
Voith Sulzer Papiertechnik Patent GmbH
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Publication date
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Publication of EP0919665A2 publication Critical patent/EP0919665A2/en
Publication of EP0919665A3 publication Critical patent/EP0919665A3/en
Application granted granted Critical
Publication of EP0919665B1 publication Critical patent/EP0919665B1/en
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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/32—Addition to the formed paper by contacting paper with an excess of material, e.g. from a reservoir or in a manner necessitating removal of applied excess material from the paper
    • D21H23/34—Knife or blade type coaters
    • 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
    • B05C1/00—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating
    • B05C1/04—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length
    • B05C1/08—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line
    • B05C1/0826—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets
    • B05C1/083—Apparatus in which liquid or other fluent material is applied to the surface of the work by contact with a member carrying the liquid or other fluent material, e.g. a porous member loaded with a liquid to be applied as a coating for applying liquid or other fluent material to work of indefinite length using a roller or other rotating member which contacts the work along a generating line the work being a web or sheets being passed between the coating roller and one or more backing rollers
    • 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
    • B05C11/023—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface
    • B05C11/025—Apparatus for spreading or distributing liquids or other fluent materials already applied to a surface with an essentially cylindrical body, e.g. roll or rod
    • 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
    • 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
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/04—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material to opposite sides of the work
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/52—Addition to the formed paper by contacting paper with a device carrying the material
    • D21H23/56—Rolls
    • 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
    • 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
    • D21H25/12—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with an essentially cylindrical body, e.g. roll or rod

Definitions

  • the invention relates to a device for indirect application of a liquid or pasty medium on a running material web, in particular made of paper or cardboard, comprising a commissioned work for application a layer of the liquid or pasty medium on the surface of a Transfer elements, which is in contact with the running material web and transfers the application layer to it, and with a leveling device a leveling element adjustable against the material web for smoothing the order layer transferred to the material web.
  • Such application devices are for example from DE 43 02 435 A1 and DE 42 43 518 A1 are known.
  • these two publications disclosed application devices is the still wet application layer processed with the help of distribution rollers to the surface roughness of the Application layer that occurs when the material web is detached from the transfer element due to the so-called "film splitting" effect smooth.
  • these rubbing rollers are around its axis running in the transverse direction of the material web is driven in rotation and lead due to a further drive in the transverse direction of the material web oscillating movements.
  • the need to move the Combine the grinder rollers in accordance with two degrees of freedom of movement having to do leads to a problem with the known application devices structurally complex structure. They were used to employ the leveling facility against the material web required movement and The drive mechanism required to bring about this movement not considered.
  • the leveling element can, for example, be essentially a doctor bar include a smooth surface, which, if desired, is driven in rotation, i.e. can be a doctor blade stick.
  • the leveling element in the application layer substantially smoothes. In this way, returns or Preparation stations for removed application medium saved become.
  • the transfer element is a transfer roller is, and that the material web, the transfer roller at least over a part whose circumference wraps around.
  • the contact of the order medium with the Material web can also be improved in that on the Side of the material web facing away from the transfer element, a counter element, preferably a counter roll is provided, preferably the Line pressing force between transfer element and counter element between is about 5 kN / m and about 30 kN / m.
  • the device according to the invention can also be used on both sides Apply liquid or pasty medium.
  • the counter element as a further transfer element for indirect application of liquid or pasty medium is trained.
  • a further transfer element can be added Equalization device may be arranged downstream, preferably the two Equalizing elements mutually support the other for each other Form leveling element.
  • the application weight per side of the material web can be, for example, between approximately 3 g / m 2 to approximately 25 g / m 2 , preferably approximately 8 g / m 2 to approximately 16 g / m 2 .
  • the application medium can include mineral substances such as kaolin, calcium carbonate, titanium dioxide, and special organic additives, for example plastic pigments or capsules.
  • the solids content of the application medium is between about 20% and 70%, preferably between about 40% and 65%. The solids content is understood to mean the mass of the abovementioned solids based on the total mass of the application medium formed from solids and carrier fluid, for example water.
  • the paper coated with the application device according to the invention has, for example, a basis weight of between approximately 30 g / m 2 and approximately 500 g / m 2 .
  • the smoothing result also depends on the line pressure depends with which the leveling element against the material web is employed, as well as the running speed of the material web. Of the reason for this is that the width of the smoothing gap between the Material web surface and the leveling element in the interplay between the contact pressure of the leveling element and the pressure in front of the leveling element build-up hydrodynamic pressure of the application medium results.
  • an application device is generally 10 designated. It comprises a transfer roller 12, on the surface 12a by means of an application unit 14 a layer of liquid or pasty Medium 16 is applied.
  • the transfer roller 12 is about an axis A. rotatably arranged in the direction of arrow P. As a result of the rotation of the Transfer roller 12 becomes the application medium 16 in the direction of travel L moving around a part of the circumference of the transfer roller 12 Material web 18 fed.
  • a support or counter roller 20 is arranged, which is about the axis B turns in the direction of arrow P ', i.e. opposite to the transfer roller 12.
  • Die Transfer roller 12 and counter roller 20 form a transfer nip between them 22, in which the liquid or pasty medium 16 with the Material web 18 is brought into engagement and transmitted to it.
  • the latter after the transfer gap 22 is preferably still one Part of the circumference of the transfer roller 12 passed around it before it breaks away from her at 24.
  • material web 18 also detaches the application layer 26 of the application medium 16 is essentially residue-free from the surface 12a of the transfer roller 12, although it due to the "film splitting" effect on bumps 26a Order layer 26 comes.
  • the leveling device 30 comprises in that shown in Figure 1 Embodiment a bendable doctor blade 32, in the technical language also known as "bent blade", which is like a drag blade against the material web 18 and in particular against the application layer 26 is employed.
  • the doctor blade 32 is fastened in a holder 34 which to position the doctor blade 32 against the material web 18 by means of of a drive mechanism, not shown, pivotable or linear adjustable, but is otherwise fixed, i.e. in particular no drive mechanism to bring about a in the transverse direction Q of the Material web 18 has oscillating movement.
  • the transverse direction Q runs 1 orthogonal to the plane of the drawing, i.e. on the one hand orthogonal to the running direction L and on the other hand to everyone Place of the material web in a local related to the respective place Lying tangent plane.
  • the leveling device 30 also has with the exception of the drive mechanism for positioning the doctor blade 32 against the web of material 18 via no further drive mechanism. On the side of the material web 18 facing away from the doctor blade 32 is the Material web 18 guided around a support roller 36.
  • the distance d of the leveling device 30 from the detachment point 24 is at most about 200 cm. In other words should the smoothing of the application layer 26 by the leveling device 30 at the latest 1.0 seconds after detachment from the surface 12a Transfer roller 12 take place.
  • a spray device 38 is provided, by means of which the Doctor blade 32 is sprayed with small amounts of steam 40. That steam condenses on the squeegee blade 32 and prevents it there that impurities settle.
  • the application layer 26 moistened to a certain extent with steam be so that they smoothen more easily by the doctor blade 32 leaves.
  • FIGS. 2 and 3 show alternative embodiments for the leveling device 30 shown.
  • the embodiment according to Figure 2 includes the leveling device 30 'instead of a "bent blade" 32, as is the case with the Embodiment according to Figure 1 is used, essentially rigid doctor blade 32 ', also called “stiff-blade”. Otherwise corresponds to Embodiment according to Figure 2 that of Figure 1, on the description thereof otherwise expressly referenced.
  • the leveling device comes 30 '' a squeegee rod 32 '' for use, which on the one hand has a has a substantially smooth surface and, on the other hand, preferably rotationally driven by means of a drive mechanism, not shown is.
  • the doctor blade 32 '' can be in the running direction L as well also turn opposite to this. It is also in the bracket 34 "of the doctor blade 32" a cooling device 40 "for the doctor blade 32" and the bracket 34 '' provided.
  • the cooling device 40 ''' outgoing cooling effect can in turn be achieved that on the Surface of the doctor blade 32 '' precipitates a condensate that the Counteracting impurities. Otherwise corresponds to Embodiment according to Figure 3 that of Figure 1, on the description thereof hereby otherwise expressly referred.
  • the Application device 10 only for one-sided indirect application of a liquid or pasty medium 16 on the material web 18.
  • the application device 110 comprises two application units 114 and 114 ', which the respective application medium 116 or 116' on the surface 112a or 112a 'of a transfer roller 112 or 112' apply.
  • a leveling device 130 or 130 ' is arranged, which the application layers 126 or 126 'elapse, so that in Direction L after leveling devices 130, 130 'one with smooth Application layers 128, 128 'provided material web 118 results.
  • FIG. 4 are both leveling devices 130 and 130 'equipped with a "bent-blade” 132 or 132'. It understands however, that also "stiff blades" according to FIG. 2 or doctor blades 3 can be used. It also understands that the leveling devices 130, 130 'according to FIG Spraying devices corresponding to the spraying device 38 according to FIG. 1 or / and cooling devices corresponding to the cooling device 40 ′′ according to Figure 3 can be equipped.

Landscapes

  • Coating Apparatus (AREA)
  • Paper (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

The apparatus to give an indirect application of a liquid or paste coating to a moving web, especially of paper or cardboard, has a spreader (32) which is aligned across (Q) the direction (L) of web (18) travel. It has an orthogonal lie, and is fixed on a local plane of the material. The spreader is a doctor rod (32) with a smooth surface, or it is a drag blade against the web, using a bending blade (32) or a stiff blade. The spreader (32) evens out the applied coating medium, without any removal, as the web (18) moves past the spreader station (30) round a supporting roller (36). The spreader has a cooling system to cool the doctor and preferably also its holder, and a unit (38) wets the doctor with a spray of steam. The spreader station (30) is a maximum 200 cm from the coating applicator (12), and preferably 50-200 cm. The running time of the web (18), between the applicator (12) and spreader (30) stations is 0.01-1.0 seconds. The coating is applied by a roller (12), with the web (18) passing at least partially round it between the applicator (12) and counter (20) rollers. The linear pressure on the web (18), between the rollers (12,20), is 5-30 kN/m. The counter roller can also be used as an indirect coating applicator, and a further spreader station smoothes the coating on that side of the web as a holder for a doctor.

Description

Die Erfindung betrifft eine Vorrichtung zum indirekten Auftragen eines flüssigen oder pastösen Mediums auf eine laufende Materialbahn, insbesondere aus Papier oder Karton, umfassend ein Auftragswerk zum Aufbringen einer Schicht des flüssigen oder pastösen Mediums auf die Oberfläche eines Übertragselements, welches mit der laufenden Materialbahn in Kontakt steht und die Auftragsschicht an diese überträgt, und eine Egalisiereinrichtung mit einem gegen die Materialbahn anstellbaren Egalisierelement zum Glätten der an die Materialbahn übertragenen Auftragsschicht.The invention relates to a device for indirect application of a liquid or pasty medium on a running material web, in particular made of paper or cardboard, comprising a commissioned work for application a layer of the liquid or pasty medium on the surface of a Transfer elements, which is in contact with the running material web and transfers the application layer to it, and with a leveling device a leveling element adjustable against the material web for smoothing the order layer transferred to the material web.

Derartige Auftragsvorrichtungen sind beispielsweise aus der DE 43 02 435 A1 und DE 42 43 518 A1 bekannt. Bei den in diesen beiden Druckschriften offenbarten Auftragsvorrichtungen wird die noch feuchte Auftragsschicht mit Hilfe von Verreibewalzen bearbeitet, um Oberflächenrauhigkeiten der Auftragsschicht, die sich beim Ablösen der Materialbahn vom Übertragselement aufgrund des sogenannten "Filmsplitting"-Effekts ergeben, zu glätten. Zur Erzielung der Verreibebewegung sind diese Verreibewalzen um ihre in Querrichtung der Materialbahn verlaufende Achse drehangetrieben und führen aufgrund eines weiteren Antriebs in Querrichtung der Materialbahn oszillierende Bewegungen aus. Die Notwendigkeit, Bewegungen der Verreibewalzen gemäß zwei Bewegungsfreiheitsgraden miteinander kombinieren zu müssen, führt bei den bekannten Auftragsvorrichtungen zu einem konstruktiv aufwendigen Aufbau. Dabei wurden die zur Anstellung der Egalsiereinrichtung gegen die Materialbahn erforderliche Bewegung und der zur Herbeiführung dieser Bewegung benötigte Antriebsmechanismus noch gar nicht berücksichtigt. Such application devices are for example from DE 43 02 435 A1 and DE 42 43 518 A1 are known. In the case of these two publications disclosed application devices is the still wet application layer processed with the help of distribution rollers to the surface roughness of the Application layer that occurs when the material web is detached from the transfer element due to the so-called "film splitting" effect smooth. To achieve the rubbing movement, these rubbing rollers are around its axis running in the transverse direction of the material web is driven in rotation and lead due to a further drive in the transverse direction of the material web oscillating movements. The need to move the Combine the grinder rollers in accordance with two degrees of freedom of movement having to do leads to a problem with the known application devices structurally complex structure. They were used to employ the leveling facility against the material web required movement and The drive mechanism required to bring about this movement not considered.

Demgegenüber ist es Aufgabe der vorliegenden Erfindung, eine gattungsgemäße Auftragsvorrichtung anzugeben, welche bei Erzielung von im praktischen Gebrauch in hohem Maße zufriedenstellenden Glättungsergebnissen einen konstruktiv einfacheren Aufbau der Egalisiereinrichtung aufweist.In contrast, it is an object of the present invention, a generic Specify application device, which in achieving practical Use highly satisfactory smoothing results has a structurally simpler construction of the leveling device.

Diese Aufgabe wird bei einer Auftragsvorrichtung der eingangs genannten Art erfindungsgemäß dadurch gelöst, daß das Egalisierelement in Querrichtung der Materialbahn, d.h. in einer zur Laufrichtung der Materialbahn im wesentlichen orthogonal und in einer lokalen Materialbahnebene verlaufenden Richtung, feststehend angeordnet ist. Durch die erfindungsgemäße Ausbildung der Egalisiereinrichtung entfällt wenigstens einer der bislang benötigten Antriebsmechanismen, was eine entsprechende Vereinfachung des Aufbaus mit sich bringt.This task is carried out in an application device of the type mentioned Art solved according to the invention in that the leveling element in the transverse direction the material web, i.e. in one to the running direction of the material web essentially orthogonal and in a local material plane Direction is fixed. By the invention Training of the leveling device is omitted at least one of the previously required drive mechanisms, which is a corresponding simplification of construction.

Das Egalisierelement kann beispielsweise einen Rakelstab mit im wesentlichen glatter Oberfläche umfassen, der gewünschtenfalls drehangetrieben, d.h. ein Rollrakelstab sein kann.The leveling element can, for example, be essentially a doctor bar include a smooth surface, which, if desired, is driven in rotation, i.e. can be a doctor blade stick.

Eine mit Ausnahme des Antriebsmechanismus für die Anstellung des Egalisierelements gegen die Materialbahn ohne weiteren Antriebsmechanismus auskommende Egalisiereinrichtung kann beispielsweise dadurch bereitgestellt werden, daß das Egalisierelement eine nach Art einer Schleppklinge gegen die Materialbahn anstellbare Rakelklinge umfaßt. Dabei kann es sich um eine im wesentlichen steife Rakelklinge, d.h. ein sogenanntes "stiff-blade" oder auch um eine sich bei Anstellung gegen die Materialbahn durchbiegende Rakelklinge, ein sogenanntes "bent-blade" handeln.One with the exception of the drive mechanism for adjusting the leveling element against the material web without an additional drive mechanism leveling device that comes out can be provided in this way, for example be that the leveling element in the manner of a drag blade against the material web adjustable doctor blade includes. It can be around a substantially rigid doctor blade, i.e. a so-called "stiff blade" or even when hitting the material web deflecting doctor blade, a so-called "bent blade" act.

Im Hinblick auf einen möglichst einfachen Aufbau der Auftragsvorrichtung wird weiter vorgeschlagen, daß das Egalisierelement die Auftragsschicht im wesentlichen abtragsfrei glättet. Hierdurch können Rückführungen bzw. Aufbereitungsstationen für abgetragenes Auftragsmedium eingespart werden. With regard to the simplest possible structure of the application device it is further proposed that the leveling element in the application layer substantially smoothes. In this way, returns or Preparation stations for removed application medium saved become.

Um definierte Glättungsbedingungen bereitstellen zu können, wird vorgeschlagen, daß sich die Materialbahn im Bereich der Egalisiereinrichtung an einem Stützeelement, vorzugsweise einer Stützwalze, abstützt.In order to be able to provide defined smoothing conditions, it is proposed that that the material web in the area of the leveling device a support element, preferably a support roller.

Um Verunreinigungen an dem Egalisierelement zu vermeiden, wird in Weiterbildung der Erfindung vorgeschlagen, daß die Egalisiereinrichtung eine Kühlvorrichtung für das Egalisierelement und vorzugsweise auch dessen Halterung umfaßt. Hierdurch kann sichergestellt werden, daß das Egalisierelement stets von einem Kondensatfilm bedeckt ist, der dem Anhaften von Verunreinigungen vorbeugt. Zusätzlich oder alternativ kann darüber hinaus eine Befeuchtungsvorrichtung zum Befeuchten des Egalisierelements vorgesehen sein, welche beispielsweise geringe Mengen Dampf auf das Egalisierelement aufsprüht, um die Bildung eines Kondensatfilms auf dem Egalisierelement zu erleichtern.In order to avoid contamination on the leveling element, is in further training the invention proposed that the leveling device a Cooling device for the leveling element and preferably also the same Bracket includes. This can ensure that the leveling element is always covered by a film of condensate that adheres prevents contamination. Additionally or alternatively, it can In addition, a moistening device for moistening the leveling element be provided which, for example, small amounts of steam on the Leveling element sprayed on to form a condensate film on the Leveling element to facilitate.

Um sicherstellen zu können, daß das Egalisierelement auf eine noch feuchte Auftragsschicht einwirken kann, wird in Weiterbildung der Erfindung vorgeschlagen, daß die Egalisiereinrichtung höchstens 200 cm, vorzugsweise zwischen etwa 50 cm und etwa 200 cm, nach der Stelle angeordnet ist, an welcher der Eingriff zwischen Materialbahn und Übertragselement beendet ist. Vorzugsweise sollte die Laufzeit der Materialbahn zwischen Übertragselement und Egalisiereinrichtung zwischen etwa 0,01 sec und 1 sec betragen.In order to be able to ensure that the leveling element is still wet Application layer can act, is proposed in a development of the invention, that the leveling device is at most 200 cm, preferably between about 50 cm and about 200 cm, is arranged after the point which ends the engagement between the material web and the transfer element is. The running time of the material web should preferably be between the transfer element and leveling device between about 0.01 sec and 1 sec be.

Um einen möglichst vollständigen Übertrag des auf die Oberfläche des Übertragselements aufgetragenen Mediums an die Materialbahn sicherstellen zu können, ist vorgesehen, daß das Übertragselement eine Übertragswalze ist, und daß die Materialbahn die Übertragswalze zumindest über einen Teil deren Umfangs umschlingt. Der Kontakt des Auftragsmediums mit der Materialbahn kann ferner dadurch verbessert werden, daß auf der dem Übertragselement abgewandten Seite der Materialbahn ein Gegenelement, vorzugsweise eine Gegenwalze, vorgesehen ist, wobei vorzugsweise die Linienpreßkraft zwischen Übertragselement und Gegenelement zwischen etwa 5 kN/m und etwa 30 kN/m beträgt.In order to transfer the surface as completely as possible Ensure the transfer elements of the medium applied to the material web To be able to, it is provided that the transfer element is a transfer roller is, and that the material web, the transfer roller at least over a part whose circumference wraps around. The contact of the order medium with the Material web can also be improved in that on the Side of the material web facing away from the transfer element, a counter element, preferably a counter roll is provided, preferably the Line pressing force between transfer element and counter element between is about 5 kN / m and about 30 kN / m.

Die erfindungsgemäße Vorrichtung kann darüber hinaus auch zum beidseitigen Auftragen von flüssigem oder pastösem Medium eingesetzt werden. Hierzu wird vorgeschlagen, daß das Gegenelement als weiteres Übertragselement zum indirekten Auftragen von flüssigem oder pastösem Medium ausgebildet ist. Dabei kann dem weiteren Übertragselement eine weitere Egalisiereinrichtung nachgeordnet sein, wobei vorzugsweise die beiden Egalisierelemente wechselseitig das Stützelement für das jeweils andere Egalisierelement bilden.The device according to the invention can also be used on both sides Apply liquid or pasty medium. For this purpose, it is proposed that the counter element as a further transfer element for indirect application of liquid or pasty medium is trained. A further transfer element can be added Equalization device may be arranged downstream, preferably the two Equalizing elements mutually support the other for each other Form leveling element.

Das Auftragsgewicht pro Seite der Materialbahn kann beispielsweise zwischen etwa 3 g/m2 bis etwa 25 g/m2, vorzugsweise etwa 8 g/m2 bis etwa 16 g/m2, betragen. Dabei kann das Auftragsmedium mineralische Stoffe wie Kaolin, Kalziumkarbonat, Titandioxid, und organische Spezialzusätze, beispielsweise Plastikpigmente oder Kapseln, umfassen. Der Feststoffgehalt des Auftragsmediums liegt zwischen etwa 20 % und 70 %, vorzugsweise zwischen etwa 40 % und 65 %. Dabei wird unter dem Feststoffgehalt die Masse der vorstehend genannten Feststoffe bezogen auf die Gesamtmasse des aus Feststoffen und Trägerfluid, beispielsweise Wasser, gebildeten Auftragsmediums verstanden. Das mit der erfindungsgemäßen Auftragsvorrichtung gestrichene Papier hat beispielsweise ein Flächengewicht zwischen etwa 30 g/m2 und etwa 500 g/m2.The application weight per side of the material web can be, for example, between approximately 3 g / m 2 to approximately 25 g / m 2 , preferably approximately 8 g / m 2 to approximately 16 g / m 2 . The application medium can include mineral substances such as kaolin, calcium carbonate, titanium dioxide, and special organic additives, for example plastic pigments or capsules. The solids content of the application medium is between about 20% and 70%, preferably between about 40% and 65%. The solids content is understood to mean the mass of the abovementioned solids based on the total mass of the application medium formed from solids and carrier fluid, for example water. The paper coated with the application device according to the invention has, for example, a basis weight of between approximately 30 g / m 2 and approximately 500 g / m 2 .

Festzuhalten ist noch, daß das Glättungsergebnis auch von der Linienpreßkraft abhängt, mit welcher das Egalisierelement gegen die Materialbahn angestellt ist, sowie von der Laufgeschwindigkeit der Materialbahn. Der Grund hierfür ist, daß sich die Weite des Glättungsspalts zwischen der Materialbahnoberfläche und dem Egalisierelement im Wechselspiel zwischen dem Anstelldruck des Egalisierelements und dem sich vor dem Egalisierelement aufbauenden hydrodynamischen Druck des Auftragsmediums ergibt. It should also be noted that the smoothing result also depends on the line pressure depends with which the leveling element against the material web is employed, as well as the running speed of the material web. Of the The reason for this is that the width of the smoothing gap between the Material web surface and the leveling element in the interplay between the contact pressure of the leveling element and the pressure in front of the leveling element build-up hydrodynamic pressure of the application medium results.

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

Figur 1
eine erste Ausführungsform einer erfindungsgemäßen Auftragsvorrichtung mit einer nachgeordneten Egalisiereinrichtung;
Figuren 2 und 3
alternative Ausführungsformen von Egalisiereinrichtungen; und
Figur 4
eine erfindungsgemäße Auftragsvorrichtung zum beidseitigen Bestreichen einer Materialbahn.
The invention will be explained in more detail below using exemplary embodiments with reference to the accompanying drawing. It shows:
Figure 1
a first embodiment of an application device according to the invention with a downstream leveling device;
Figures 2 and 3
alternative embodiments of leveling devices; and
Figure 4
an application device according to the invention for coating a material web on both sides.

In Figur 1 ist eine erfindungsgemäße Auftragsvorrichtung allgemein mit 10 bezeichnet. Sie umfaßt eine Übertragswalze 12, auf deren Oberfläche 12a mittels eines Auftragswerks 14 eine Schicht flüssigen oder pastösen Mediums 16 aufgebracht wird. Die Übertragswalze 12 ist um eine Achse A in Richtung des Pfeils P drehbar angeordnet. Infolge der Drehung der Übertragswalze 12 wird das Auftragsmedium 16 einer sich in Laufrichtung L bewegenden, über einen Teil des Umfangs der Übertragswalze 12 herumgeführten Materialbahn 18 zugeführt.In Figure 1, an application device according to the invention is generally 10 designated. It comprises a transfer roller 12, on the surface 12a by means of an application unit 14 a layer of liquid or pasty Medium 16 is applied. The transfer roller 12 is about an axis A. rotatably arranged in the direction of arrow P. As a result of the rotation of the Transfer roller 12 becomes the application medium 16 in the direction of travel L moving around a part of the circumference of the transfer roller 12 Material web 18 fed.

Auf der der Übertragswalze 12 abgewandten Seite der Materialbahn 18 ist eine Stütz- oder Gegenwalze 20 angeordnet, welche sich um die Achse B in Richtung des Pfeils P' dreht, d.h. gegensinnig zur Übertragswalze 12. Die Übertragswalze 12 und die Gegenwalze 20 bilden zwischen sich einen Übertragsspalt 22, in welchem das flüssige oder pastöse Medium 16 mit der Materialbahn 18 in Eingriff gebracht und an diese übertragen wird. Zur Verbesserung des Eingriffs des Auftragsmediums 16 mit der Materialbahn 18 ist letztere nach dem Übertragsspalt 22 vorzugsweise noch über einen Teil des Umfangs der Übertragswalze 12 um diese herumgeführt, bevor sie sich bei 24 von ihr löst. Idealerweise löst sich mit der Materialbahn 18 auch die Auftragsschicht 26 des Auftragsmediums 16 im wesentlichen rückstandsfrei von der Oberfläche 12a der Übertragswalze 12, wobei es allerdings aufgrund des "Filmsplitting"-Effekts zu Unebenheiten 26a der Auftragsschicht 26 kommt.On the side of the material web 18 facing away from the transfer roller 12 a support or counter roller 20 is arranged, which is about the axis B turns in the direction of arrow P ', i.e. opposite to the transfer roller 12. Die Transfer roller 12 and counter roller 20 form a transfer nip between them 22, in which the liquid or pasty medium 16 with the Material web 18 is brought into engagement and transmitted to it. For Improvement of the engagement of the application medium 16 with the material web 18, the latter after the transfer gap 22 is preferably still one Part of the circumference of the transfer roller 12 passed around it before it breaks away from her at 24. Ideally, material web 18 also detaches the application layer 26 of the application medium 16 is essentially residue-free from the surface 12a of the transfer roller 12, although it due to the "film splitting" effect on bumps 26a Order layer 26 comes.

In einem Abstand d, der ausgehend von der Ablösestelle 24 gemessen wird, ist in Laufrichtung L nach der Übertragswalze 12 eine Egalisiereinrichtung 30 angeordnet. Die Egalisiereinrichtung 30 umfaßt in dem in Figur 1 dargestellten Ausführungsbeispiel eine biegbare Rakelklinge 32, in der Fachsprache auch als "bent-blade" bezeichnet, die nach Art einer Schleppklinge gegen die Materialbahn 18 und insbesondere gegen die Auftragsschicht 26 angestellt ist. Die Rakelklinge 32 ist in einer Halterung 34 befestigt, die zwar zur Anstellung der Rakelklinge 32 gegen die Materialbahn 18 mittels eines nicht dargestellten Antriebsmechanismus verschwenkbar oder linear verstellbar, ansonsten jedoch feststehend ausgebildet ist, d.h. insbesondere keinen Antriebsmechanismus zur Herbeiführung einer in Querrichtung Q der Materialbahn 18 oszillierenden Bewegung aufweist. Die Querrichtung Q verläuft dabei in der Darstellung gemäß Figur 1 orthogonal zur Zeichenebene, d.h. zum einen orthogonal zur Laufrichtung L und zum anderen an jeder Stelle der Materialbahn in einer auf die jeweilige Stelle bezogenen lokalen Tangentialebene liegend. Darüber hinaus verfügt die Egalisiereinrichtung 30 mit Ausnahme des Antriebsmechanismus zum Anstellen der Rakelklinge 32 gegen die Materialbahn 18 über keinen weiteren Antriebsmechanismus. Auf der der Rakelklinge 32 abgewandten Seite der Materialbahn 18 ist die Materialbahn 18 um eine Stützwalze 36 herumgeführt.At a distance d, which is measured starting from the separation point 24, is a leveling device in the running direction L after the transfer roller 12 30 arranged. The leveling device 30 comprises in that shown in Figure 1 Embodiment a bendable doctor blade 32, in the technical language also known as "bent blade", which is like a drag blade against the material web 18 and in particular against the application layer 26 is employed. The doctor blade 32 is fastened in a holder 34 which to position the doctor blade 32 against the material web 18 by means of of a drive mechanism, not shown, pivotable or linear adjustable, but is otherwise fixed, i.e. in particular no drive mechanism to bring about a in the transverse direction Q of the Material web 18 has oscillating movement. The transverse direction Q runs 1 orthogonal to the plane of the drawing, i.e. on the one hand orthogonal to the running direction L and on the other hand to everyone Place of the material web in a local related to the respective place Lying tangent plane. The leveling device 30 also has with the exception of the drive mechanism for positioning the doctor blade 32 against the web of material 18 via no further drive mechanism. On the side of the material web 18 facing away from the doctor blade 32 is the Material web 18 guided around a support roller 36.

Infolge der Vorüberbewegung der Materialbahn 18 in Laufrichtung L an der Rakelklinge 32 verstreicht die Rakelklinge 32 etwaige Unebenheiten 26a der Auftragsschicht 26, ohne Auftragsmedium 16 von der Materialbahn 18 abzutragen. Auf diese Weise ergibt sich in Laufrichtung L nach der Egalisiereinrichtung 30 eine Auftragsschicht 28, welche verglichen mit der Auftragsschicht 26 vor der Egalisiereinrichtung 30 eine wesentlich glattere Oberfläche aufweist.As a result of the passing of the material web 18 in the running direction L on the Doctor blade 32 spreads the doctor blade 32 any unevenness 26a Application layer 26 without removing application medium 16 from the material web 18. This results in the running direction L after the leveling device 30 an application layer 28, which compared to the Application layer 26 in front of the leveling device 30 a much smoother Surface.

Um die Verstreichwirkung der Rakelklinge 32 möglichst effektiv ausnutzen zu können, muß die Auftragsschicht 26 im Bereich der Egalisiereinrichtung 30 zumindest in ihrem Oberflächenbereich noch eine gewisse Restfeuchtigkeit aufweisen. Daher sollte der Abstand d der Egalisiereinrichtung 30 von der Ablösestelle 24 höchstens etwa 200 cm betragen. Mit anderen Worten sollte die Glättung der Auftragsschicht 26 durch die Egalisiereinrichtung 30 spätestens 1,0 Sekunden nach dem Ablösen von der Oberfläche 12a der Übertragswalze 12 erfolgen.In order to use the spreading action of the doctor blade 32 as effectively as possible order layer 26 must be in the area of the leveling device 30 some residual moisture, at least in its surface area exhibit. Therefore, the distance d of the leveling device 30 from the detachment point 24 is at most about 200 cm. In other words should the smoothing of the application layer 26 by the leveling device 30 at the latest 1.0 seconds after detachment from the surface 12a Transfer roller 12 take place.

Um verhindern zu können, daß sich auf der Rakelklinge 32 Verunreinigungen festsetzen, ist in Laufrichtung L der Materialbahn 18 vor der Egalisiereinrichtung 30 eine Sprüheinrichtung 38 vorgesehen, mit deren Hilfe die Rakelklinge 32 mit geringen Mengen Dampf 40 besprüht wird. Dieser Dampf schlägt sich als Kondensat auf der Rakelklinge 32 nieder und verhindert dort, daß sich Verunreinigungen festsetzen. Zum anderen kann durch das Besprühen mit Dampf die Auftragsschicht 26 in gewissem Maße wieder befeuchtet werden, so daß sie sich durch die Rakelklinge 32 leichter glätten läßt.In order to be able to prevent 32 impurities on the doctor blade fix, is in the running direction L of the material web 18 in front of the leveling device 30 a spray device 38 is provided, by means of which the Doctor blade 32 is sprayed with small amounts of steam 40. That steam condenses on the squeegee blade 32 and prevents it there that impurities settle. On the other hand, through the Spraying the application layer 26 moistened to a certain extent with steam be so that they smoothen more easily by the doctor blade 32 leaves.

In den Figuren 2 und 3 sind alternative Ausführungsformen für die Egalisiereinrichtung 30 dargestellt. In der Ausführungsform gemäß Figur 2 umfaßt die Egalisiereinrichtung 30' anstelle eines "bent-blade" 32, wie es bei der Ausführungsform gemäß Figur 1 zum Einsatz kommt, eine im wesentlichen starre Rakelklinge 32', auch "stiff-blade" genannt. Ansonsten entspricht die Ausführungsform gemäß Figur 2 jener gemäß Figur 1, auf deren Beschreibung ansonsten hiermit ausdrücklich verwiesen sei.FIGS. 2 and 3 show alternative embodiments for the leveling device 30 shown. In the embodiment according to Figure 2 includes the leveling device 30 'instead of a "bent blade" 32, as is the case with the Embodiment according to Figure 1 is used, essentially rigid doctor blade 32 ', also called "stiff-blade". Otherwise corresponds to Embodiment according to Figure 2 that of Figure 1, on the description thereof otherwise expressly referenced.

In der Ausführungsvariante gemäß Figur 3 kommt bei der Egalisiereinrichtung 30'' ein Rakelstab 32'' zum Einsatz, der zum einen über eine im wesentlichen glatte Oberfläche verfügt und zum anderen vorzugsweise mittels eines nicht näher dargestellten Antriebsmechanismus drehangetrieben ist. Die Rollrakel 32'' kann sich dabei sowohl in Laufrichtung L als auch entgegengesetzt zu dieser drehen. Darüber hinaus ist in der Halterung 34'' der Rollrakel 32'' eine Kühleinrichtung 40'' für die Rollrakel 32'' und deren Halterung 34'' vorgesehen. Mittels der von dieser Kühleinrichtung 40'' ausgehenden Kühlwirkung kann wiederum erreicht werden, daß sich auf der Oberfläche der Rollrakel 32'' ein Kondensat niederschlägt, das dem Festsetzen von Verunreinigungen entgegenwirkt. Ansonsten entspricht die Ausführungsform gemäß Figur 3 jener gemäß Figur 1, auf deren Beschreibung hiermit ansonsten ausdrücklich verwiesen sei.In the embodiment variant according to FIG. 3, the leveling device comes 30 '' a squeegee rod 32 '' for use, which on the one hand has a has a substantially smooth surface and, on the other hand, preferably rotationally driven by means of a drive mechanism, not shown is. The doctor blade 32 '' can be in the running direction L as well also turn opposite to this. It is also in the bracket 34 "of the doctor blade 32" a cooling device 40 "for the doctor blade 32" and the bracket 34 '' provided. By means of the cooling device 40 '' outgoing cooling effect can in turn be achieved that on the Surface of the doctor blade 32 '' precipitates a condensate that the Counteracting impurities. Otherwise corresponds to Embodiment according to Figure 3 that of Figure 1, on the description thereof hereby otherwise expressly referred.

Festzuhalten ist, daß zusätzlich oder alternativ zu der Kühleinrichtung 40 bei der Ausführungsform gemäß Figur 3 auch eine der Sprüheinrichtung 38 entsprechende Sprüheinrichtung vorgesehen sein kann. Selbstverständlich kann auch bei Einsatz einer Rakelklinge 32 bzw. 32' gemäß Figur 1 bzw. 2 zusätzlich zu der Sprüheinrichtung 38 eine der Kühleinrichtung 40'' entsprechende Kühleinrichtung vorgesehen sein.It should be noted that in addition or as an alternative to the cooling device 40 of the embodiment according to FIG. 3 also one corresponding to the spray device 38 Spray device can be provided. Of course you can also when using a doctor blade 32 or 32 'according to FIG. 1 or 2 additionally to the spray device 38 one corresponding to the cooling device 40 ″ Cooling device may be provided.

In den Ausführungsvarianten gemäß den Figuren 1, 2 und 3 diente die Auftragsvorrichtung 10 lediglich zum einseitigen indirekten Auftragen eines flüssigen oder pastösen Mediums 16 auf die Materialbahn 18. Wie in Figur 4 dargestellt ist, ist es jedoch auch möglich, die Erfindung bei einer Auftragsvorrichtung 110 zum beidseitigen indirekten Auftrag von flüssigen oder pastösen Medien 116 bzw. 116' auf eine laufende Materialbahn 118 einzusetzen. Die Auftragsvorrichtung 110 umfaßt hierzu zwei Auftragswerke 114 und 114', welche das jeweilige Auftragsmedium 116 bzw. 116' auf die Oberfläche 112a bzw. 112a' einer Übertragswalze 112 bzw. 112' aufbringen. Durch Drehung der Übertragswalzen 112 bzw. 112' um die Achsen A bzw. A' in Richtung der Pfeile P bzw. P' wird das jeweilige Auftragsmedium einem Übertragsspalt 122 zugeführt, wo der beidseitige Übertrag an die Materialbahn 18 erfolgt. In the design variants according to FIGS. 1, 2 and 3 the Application device 10 only for one-sided indirect application of a liquid or pasty medium 16 on the material web 18. As in Figure 4, it is also possible to apply the invention to a Application device 110 for the indirect application of liquid on both sides or pasty media 116 or 116 'onto a running material web 118 to use. For this purpose, the application device 110 comprises two application units 114 and 114 ', which the respective application medium 116 or 116' on the surface 112a or 112a 'of a transfer roller 112 or 112' apply. By rotating the transfer rollers 112 and 112 'around the Axes A and A 'in the direction of arrows P and P' respectively Application medium fed to a transfer nip 122, where the bilateral Transfer to the material web 18 takes place.

In Laufrichtung L nach dem Übertragsspalt 122 sind beidseits der Materialbahn 118 jeweils eine Egalisiereinrichtung 130 bzw. 130' angeordnet, welche die Auftragsschichten 126 bzw. 126' verstreichen, so daß sich in Laufrichtung L nach den Egalisiereinrichtungen 130, 130' eine mit glatten Auftragsschichten 128, 128' versehene Materialbahn 118 ergibt. In der in Figur 4 dargestellten Ausführungsform sind beide Egalisiereinrichtungen 130 und 130' mit einem "bent-blade" 132 bzw. 132' ausgestattet. Es versteht sich jedoch, daß ebenso auch "stiff-blades" gemäß Figur 2 oder Rakelstäbe gemäß Figur 3 zum Einsatz kommen können. Darüber hinaus versteht es sich, daß auch die Egalisiereinrichtungen 130, 130' gemäß Figur 4 mit Sprüheinrichtungen entsprechend der Sprüheinrichtung 38 gemäß Figur 1 oder/und Kühleinrichtungen entsprechend der Kühleinrichtung 40'' gemäß Figur 3 ausgestattet sein können.In the running direction L after the transfer gap 122 are on both sides of the material web 118 a leveling device 130 or 130 'is arranged, which the application layers 126 or 126 'elapse, so that in Direction L after leveling devices 130, 130 'one with smooth Application layers 128, 128 'provided material web 118 results. In the in The embodiment shown in FIG. 4 are both leveling devices 130 and 130 'equipped with a "bent-blade" 132 or 132'. It understands however, that also "stiff blades" according to FIG. 2 or doctor blades 3 can be used. It also understands that the leveling devices 130, 130 'according to FIG Spraying devices corresponding to the spraying device 38 according to FIG. 1 or / and cooling devices corresponding to the cooling device 40 ″ according to Figure 3 can be equipped.

Claims (18)

Vorrichtung (10; 110) zum indirekten Auftragen eines flüssigen oder pastösen Mediums (16; 116, 116') auf eine laufende Materialbahn (18; 118), insbesondere aus Papier oder Karton, umfassend: ein Auftragswerk (14; 114, 114') zum Aufbringen einer Schicht des flüssigen oder pastösen Mediums auf die Oberfläche (12a; 112a, 112'a) eines Übertragselements (12; 112, 112'), welches mit der laufenden Materialbahn (18; 118) in Kontakt steht und die Auftragsschicht an diese überträgt, und eine Egalisiereinrichtung (30; 130, 130') mit einem gegen die Materialbahn (18; 118) anstellbaren Egalisierelement (32; 32'; 32''; 132, 132') zum Glätten der an die Materialbahn (18; 118) übertragenen Auftragsschicht (26; 126, 126'), dadurch gekennzeichnet, daß das Egalisierelement (32; 32'; 32''; 132, 132') in Querrichtung (Q) der Materialbahn (18; 118), d.h. in einer zur Laufrichtung (L) der Materialbahn (18; 118) im wesentlichen orthogonal und in einer lokalen Materialbahnebene verlaufenden Richtung, feststehend angeordnet ist.Device (10; 110) for the indirect application of a liquid or pasty medium (16; 116, 116 ') to a running material web (18; 118), in particular made of paper or cardboard, comprising: an application unit (14; 114, 114 ') for applying a layer of the liquid or pasty medium to the surface (12a; 112a, 112'a) of a transfer element (12; 112, 112') which is connected to the running material web (18; 118) is in contact and transfers the job shift to it, and a leveling device (30; 130, 130 ') with a leveling element (32; 32'; 32 ''; 132, 132 ') which can be set against the material web (18; 118) for smoothing the application layer transferred to the material web (18; 118) (26; 126, 126 '), characterized in that the leveling element (32; 32 ';32''; 132, 132') in the transverse direction (Q) of the material web (18; 118), ie in one to the running direction (L) of the material web (18; 118) in is arranged substantially orthogonal and in a local material web direction. Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet, daß das Egalisierelement einen Rakelstab (32'') mit im wesentlichen glatter Oberfläche umfaßt.Device according to claim 1,
characterized in that the leveling element comprises a doctor rod (32 '') with a substantially smooth surface. Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet, daß das Egalisierelement eine nach Art einer Schleppklinge gegen die Materialbahn anstellbare Rakelklinge (32; 32') umfaßt. Device according to claim 1,
characterized in that the leveling element comprises a doctor blade (32; 32 ') which can be set against the material web in the manner of a drag blade. Vorrichtung nach Anspruch 3,
dadurch gekennzeichnet, daß das Egalisierelement eine sich bei Anstellung gegen die Materialbahn durchbiegende Rakelklinge (32) umfaßt.Device according to claim 3,
characterized in that the leveling element comprises a doctor blade (32) which bends when it bears against the material web. Vorrichtung nach Anspruch 3,
dadurch gekennzeichnet, daß das Egalisierelement eine im wesentlichen steife Rakelklinge (32') umfaßt.Device according to claim 3,
characterized in that the leveling element comprises a substantially rigid doctor blade (32 '). Vorrichtung nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, daß das Egalisierelement (32; 32'; 32''; 132, 132') die Auftragsschicht (26; 126, 126') im wesentlichen abtragsfrei glättet.Device according to one of claims 1 to 5,
characterized in that the leveling element (32; 32 ';32''; 132, 132') smoothes the application layer (26; 126, 126 ') essentially without removal. Vorrichtung nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, daß sich die Materialbahn (18; 118) im Bereich der Egalisiereinrichtung (30; 130, 130') an einem Stützelement (36; 132', 132), vorzugsweise einer Stützwalze, abstützt.Device according to one of claims 1 to 6,
characterized in that the material web (18; 118) is supported in the region of the leveling device (30; 130, 130 ') on a support element (36; 132', 132), preferably a support roller. Vorrichtung nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet, daß die Egalisiereinrichtung (30'') eine Kühlvorrichtung (40'') für das Egalisierelement (32'') und vorzugsweise auch dessen Halterung (34'') umfaßt.Device according to one of claims 1 to 7,
characterized in that the leveling device (30 '') comprises a cooling device (40 '') for the leveling element (32 '') and preferably also its holder (34 ''). Vorrichtung nach einem der Ansprüche 1 bis 8,
dadurch gekennzeichnet, daß eine Befeuchtungsvorrichtung (38) vorgesehen ist zum Befeuchten des Egalisierelements (32). Device according to one of claims 1 to 8,
characterized in that a moistening device (38) is provided for moistening the leveling element (32). Vorrichtung nach Anspruch 9,
dadurch gekennzeichnet, daß die Befeuchtungsvorrichtung eine Sprühvorrichtung (38) zum Besprühen des Egalisierelements (32) mit Dampf ist.Device according to claim 9,
characterized in that the moistening device is a spray device (38) for spraying the leveling element (32) with steam. Vorrichtung nach einem der Ansprüche 1 bis 10,
dadurch gekennzeichnet, daß die Egalisiereinrichtung (30; 30'; 30''; 130, 130') höchstens 200 cm, vorzugsweise zwischen etwa 50 cm und 200 cm, nach der Stelle (24) angeordnet ist, an welcher der Eingriff zwischen Materialbahn (18; 118) und Übertragselement (12; 112, 112') beendet ist.Device according to one of claims 1 to 10,
characterized in that the leveling device (30; 30 ';30''; 130, 130') is arranged at most 200 cm, preferably between about 50 cm and 200 cm, after the point (24) at which the engagement between the material web ( 18; 118) and transfer element (12; 112, 112 ') has ended. Vorrichtung nach einem der Ansprüche 1 bis 11,
dadurch gekennzeichnet, daß die Laufzeit der Materialbahn (18; 118) zwischen Übertragselement (12; 112, 112') und Egalisiereinrichtung (30; 30'; 30''; 130, 130') zwischen 0,01 sec und 1,0 sec beträgt.Device according to one of claims 1 to 11,
characterized in that the transit time of the material web (18; 118) between the transfer element (12; 112, 112 ') and leveling device (30; 30'; 30 ''; 130, 130 ') is between 0.01 sec and 1.0 sec is. Vorrichtung nach einem der Ansprüche 1 bis 12,
dadurch gekennzeichnet, daß das Übertragselement eine Übertragswalze (12; 112, 112') ist, und daß die Materialbahn (18; 118) die Übertragswalze zumindest über einen Teil deren Umfangs umschlingt.Device according to one of claims 1 to 12,
characterized in that the transfer element is a transfer roller (12; 112, 112 ') and in that the material web (18; 118) wraps around the transfer roller at least over part of its circumference. Vorrichtung nach einem der Ansprüche 1 bis 13,
dadurch gekennzeichnet, daß auf der dem Übertragselement (12; 112, 112') abgewandten Seite der Materialbahn (18; 118) ein Gegenelement, vorzugsweise eine Gegenwalze (20; 112', 112), vorgesehen ist.Device according to one of claims 1 to 13,
characterized in that a counter element, preferably a counter roller (20; 112 ', 112), is provided on the side of the material web (18; 118) facing away from the transfer element (12; 112, 112'). Vorrichtung nach Anspruch 14,
dadurch gekennzeichnet, daß die Linienpreßkraft zwischen dem Übertragselement (12; 112, 112') und dem Gegenelement (20; 112', 112) zwischen etwa 5 kN/m und etwa 30 kN/m beträgt. Device according to claim 14,
characterized in that the line pressing force between the transfer element (12; 112, 112 ') and the counter element (20; 112', 112) is between approximately 5 kN / m and approximately 30 kN / m. Vorrichtung nach Anspruch 14 oder 15,
dadurch gekennzeichnet, daß das Gegenelement (112') als weiteres Übertragselement (112') zum indirekten Auftragen von flüssigem oder pastösem Medium (116') ausgebildet ist.Device according to claim 14 or 15,
characterized in that the counter element (112 ') is designed as a further transfer element (112') for the indirect application of liquid or pasty medium (116 '). Vorrichtung nach Anspruch 16,
dadurch gekennzeichnet, daß dem weiteren Übertragselement (112') eine weitere Egalisiereinrichtung (130') nachgeordnet ist.Device according to claim 16,
characterized in that a further leveling device (130 ') is arranged downstream of the further transfer element (112'). Vorrichtung nach Anspruch 17,
dadurch gekennzeichnet, daß ein Egalisierelement (132') der weiteren Egalisiereinrichtung (130') das Stützelement für das eine Egalisierelement (132) bildet.Device according to claim 17,
characterized in that a leveling element (132 ') of the further leveling device (130') forms the support element for the one leveling element (132).
EP98114277A 1997-11-21 1998-07-30 Apparatus for applying indirectly a liquid or pasty medium onto a moving web, in particular of paper of board Expired - Lifetime EP0919665B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19751697A DE19751697A1 (en) 1997-11-21 1997-11-21 Device for the indirect application of a liquid or pasty medium to a material web, in particular made of paper or cardboard
DE19751697 1997-11-21

Publications (3)

Publication Number Publication Date
EP0919665A2 true EP0919665A2 (en) 1999-06-02
EP0919665A3 EP0919665A3 (en) 1999-06-16
EP0919665B1 EP0919665B1 (en) 2001-10-24

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EP98114277A Expired - Lifetime EP0919665B1 (en) 1997-11-21 1998-07-30 Apparatus for applying indirectly a liquid or pasty medium onto a moving web, in particular of paper of board

Country Status (5)

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US (1) US6126750A (en)
EP (1) EP0919665B1 (en)
JP (1) JPH11197582A (en)
CA (1) CA2254387A1 (en)
DE (2) DE19751697A1 (en)

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WO2021260240A1 (en) * 2020-06-26 2021-12-30 Barberan Latorre Jesus Francisco System for coating a continuous sheet

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WO2021260240A1 (en) * 2020-06-26 2021-12-30 Barberan Latorre Jesus Francisco System for coating a continuous sheet

Also Published As

Publication number Publication date
US6126750A (en) 2000-10-03
DE19751697A1 (en) 1999-05-27
CA2254387A1 (en) 1999-05-21
DE59801848D1 (en) 2001-11-29
JPH11197582A (en) 1999-07-27
EP0919665B1 (en) 2001-10-24
EP0919665A3 (en) 1999-06-16

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