EP0752497A2 - Appareil pour déposer une substance fluide sur un matériau en bande - Google Patents

Appareil pour déposer une substance fluide sur un matériau en bande Download PDF

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Publication number
EP0752497A2
EP0752497A2 EP96110456A EP96110456A EP0752497A2 EP 0752497 A2 EP0752497 A2 EP 0752497A2 EP 96110456 A EP96110456 A EP 96110456A EP 96110456 A EP96110456 A EP 96110456A EP 0752497 A2 EP0752497 A2 EP 0752497A2
Authority
EP
European Patent Office
Prior art keywords
air knife
roller
counter surface
web
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.)
Withdrawn
Application number
EP96110456A
Other languages
German (de)
English (en)
Other versions
EP0752497A3 (fr
Inventor
Hans Peter Arledter
Herbert Haunlieb
Walter Humplstötter
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.)
Voith Patent GmbH
Original Assignee
Voith Sulzer Papiermaschinen 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 Voith Sulzer Papiermaschinen GmbH filed Critical Voith Sulzer Papiermaschinen GmbH
Publication of EP0752497A2 publication Critical patent/EP0752497A2/fr
Publication of EP0752497A3 publication Critical patent/EP0752497A3/fr
Withdrawn legal-status Critical Current

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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
    • D21H23/40—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 only one side of the paper being in contact with the material
    • 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
    • B05C3/00—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material
    • B05C3/18—Apparatus in which the work is brought into contact with a bulk quantity of liquid or other fluent material only one side of the work coming into contact with the liquid or other fluent material
    • 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
    • D21H25/16—Rearranging applied substances, e.g. metering, smoothing; Removing excess material with a blast of vapour or gas, e.g. air knife
    • 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

Definitions

  • the invention relates to a device for applying a flowable substance to a material web, such as paper or cardboard, with the features specified in the preamble of claim 1.
  • a material web such as paper or cardboard
  • Such a device can be used particularly advantageously in cardboard coating systems.
  • roller assigned to the air knife as the counter surface one usually chooses a roller with the smallest possible diameter (and also in the solution according to EP 0651095), which experience has shown to lead to better results in the leveling process by the air knife, but often to problems due to the deflection of the roller large application widths.
  • the object of the present invention is to provide a simply constructed device with which the above-mentioned problems can be eliminated.
  • the object is achieved by the features specified in the characterizing part of claim 1. Because the device contains only a single driven element and a counter surface for the metering device and the air knife-forming element, all other drives can be saved. This reduces costs, it also makes the device clearer and the individual elements more easily accessible. The necessary elements can be arranged closer together, whereby the external dimensions of the device become smaller. The particular advantage, however, is that the metering device and air knife can be arranged in close succession, so that the metered substance is still fresh when leveled by the air knife.
  • a so-called contour line is created with the air knife, i.e. with a relatively strongly bundled air jet, the line just applied is blown, so that the line surface follows the surface contour of the base paper.
  • This contour stroke can be applied particularly effectively by the arrangement according to the invention. This is a great advantage because it achieves a uniform coating layer thickness and thus better coverage of the paper without unwanted raw paper spots showing through. This is particularly advantageous for cardboard (brown paper).
  • any known metering device such as a doctor rod, compact nozzle (SDTA nozzle) with an elastic or rigid blade, or a free jet nozzle is conceivable as the metering device.
  • the driven element is preferably a counter roller on which both the metering device and the air knife are arranged.
  • This requires a roll size that has not been used in such devices in connection with air knives.
  • large rollers are not suitable for leveling with air knives must be viewed as a prejudice.
  • the arrangement of the metering device and leveling device on a roller is very space-saving, ensures a short path between the above-mentioned processing devices and thus a good application result, and the transport of the material web is accomplished without problems by the material web being in contact with the driven roller.
  • the driven element is a plastic band that runs over a driven and one or more non-driven rollers or one or more slide bars
  • the metering device in the area of a roller or a slide bar and the air knife in the area of another roller or another Sliding bar interacts with the plastic band as the counter surface.
  • the plastic band can interact as a counter surface in the area of the air knife.
  • the plastic band in the area of the air knife the plastic band can be deflected as a counter surface with a small radius on a roller or a sliding beam and the air knife can be used under the known conditions, ie the parameters and empirical values from known devices can be used.
  • the circumferential plastic band supports the material web when running through the device according to the invention.
  • the plastic strip preferably runs in the area of the air knife over a non-driven roller or a sliding bar, which is divided into several segments over the application width, between which support elements are provided.
  • FIG. 1 to 4 schematically show the structure of various embodiments of the invention.
  • 5 and 6 each show a side view of an air knife coating unit, which is constructed according to the principle of the embodiment according to FIG. 3.
  • Fig. 5 shows the operating position and Fig. 6 the cleaning position.
  • the device in Fig. 1 contains a driven roller 1 (in the figures, the driven rollers with the symbol characterized) and two drive-less, smaller rollers 2, 3.
  • An endless plastic belt 4 wraps around these rollers 1, 2, 3 and serves as a support for the material web 5 as it passes through the device.
  • the material web 5 first passes through the metering device 6 and then through the leveling device with the air knife 7.
  • Any known metering device such as a doctor rod, compact nozzle with an elastic or rigid blade or a free jet nozzle, is conceivable as the metering device 6.
  • the metering device 6 works together with a region of the plastic strip 4 as a counter surface, in which the plastic strip 4 lies against the roller 1.
  • the air knife 7 works together with an area of the plastic band 4 in which it rests on the roller 2.
  • An ink collecting box 8 is arranged below the roller 2 and the air knife 7.
  • FIG. 2 differs from that of FIG. 1 in that a slide bar 9 is provided instead of the small, non-driven roller which is arranged in the area of the air knife in FIG. 1.
  • the plastic belt 4 runs over this sliding bar 9 and, as in FIG. 1, serves as a support and conveyor belt for the material web 5.
  • Figure 3 shows the most compact of the embodiments of the invention.
  • the material web 5 wraps around a counter roller 1, which can have a diameter of, for example, 600 mm.
  • a counter roller 1 On the counter roller 1 are both the metering device 6 and that Air knife 7 arranged, ie it serves as a counter surface both when metering the substance and when leveling it.
  • SDTA Short Dwell Time Applicator 6 ', known per se, with a coating medium supply 10, a doctor blade 11 as a metering and leveling element and an overflow bar 12 for excess coating medium 13 which comes from the application zone flows over the overflow bar 12.
  • the metering element and the air knife are also assigned to a single counter surface in the form of the roller 1.
  • Another advantage of this design is that even higher solids contents and higher speeds can be driven.
  • the air knife shown in the devices of FIGS. 1 to 4 can have a single nozzle or a double nozzle with nozzles offset by 180 °, the air supply being switched over when the nozzle is changed, or separate air supplies being provided for the two nozzles. If separate air supplies are provided, an air jet can be used to clean the inactive nozzle without having to interrupt the application.
  • a roller 1 is mounted in a frame 11.
  • a lever 13 which can be pivoted about an axis 12, at one end of which a pneumatic cylinder 14 engages and the other end of which carries the air knife 7.
  • an adjustable distance device 15 is provided on the lever 13.
  • two lateral, pivotable plates 16 are provided, between which there is an ink collecting box 8.
  • the ink collecting box 8 is provided with a pneumatic cleaning flap 17, which enables easy cleaning.
  • a doctor blade 18 for pre-metering the substance is provided between the plates 16.
  • the plates 16 can be pivoted between the working position and the cleaning position by means of a pneumatic cylinder 19. As can be seen in FIG.
  • the device according to the invention can be used equally well for LWC papers and brown papers (cardboard).

Landscapes

  • Coating Apparatus (AREA)
EP96110456A 1995-07-03 1996-06-28 Appareil pour déposer une substance fluide sur un matériau en bande Withdrawn EP0752497A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT1131/95 1995-07-03
AT113195A AT409349B (de) 1995-07-03 1995-07-03 Auftragsvorrichtung zur aufbringung von fliessfähigen stoffen auf materialbahnen

Publications (2)

Publication Number Publication Date
EP0752497A2 true EP0752497A2 (fr) 1997-01-08
EP0752497A3 EP0752497A3 (fr) 1997-05-21

Family

ID=3507271

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96110456A Withdrawn EP0752497A3 (fr) 1995-07-03 1996-06-28 Appareil pour déposer une substance fluide sur un matériau en bande

Country Status (2)

Country Link
EP (1) EP0752497A3 (fr)
AT (1) AT409349B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19733333A1 (de) * 1997-08-01 1999-02-04 Voith Sulzer Papiermasch Gmbh Vorrichtung zum direkten oder indirekten Auftragen eines flüssigen oder pastösen Auftragsmediums auf eine laufende Materialbahn, insbesondere aus Papier oder Karton
EP0967327A3 (fr) * 1998-06-22 2001-10-17 Voith Paper Patent GmbH Dispositif pour appliquer directement ou indirectement une enduction fluide ou pâteuse sur une bande en mouvement
WO2008133630A1 (fr) * 2007-04-30 2008-11-06 Hewlett-Packard Development Company, L.P. Procédé et appareil permettant l'impression d'un fluide sur un substrat

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1030168B (de) * 1951-09-07 1958-05-14 John Waldron Corp Vorrichtung zum Anblasen von Werkstoff-, insbesondere von mit Farbmasse ueberzogenenPapierbahnen
GB1059206A (en) * 1964-04-13 1967-02-15 Du Pont Improvements in or relating to air knives
GB2174625A (en) * 1985-05-09 1986-11-12 Cons Paper Inc Trailing blade web coater
US4697542A (en) * 1985-05-13 1987-10-06 The Kohler Coating Machinery Corporation Adjustable nozzle for coating equipment
DE3724374A1 (de) * 1986-07-25 1988-02-04 Valmet Paper Machinery Inc Kurzzeit-beschichtungsmaschine
WO1988004959A1 (fr) * 1987-01-05 1988-07-14 Beloit Corporation Dispositif et procede pour application d'enduit
EP0651095A1 (fr) * 1993-10-27 1995-05-03 Valmet Paper Machinery Inc. Procédé et dispositif pour enduire une bande en mouvement

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE807746C (de) * 1948-10-02 1951-07-02 Mannheim Waldhof Vorrichtung zum Auftragen von Traenkmitteln, Klebemassen o. dgl. auf laufende Bahnen aus Papier, Gewebe o. dgl.
NL7101419A (fr) * 1971-02-03 1972-08-07
DE3417487A1 (de) * 1984-05-11 1985-11-21 J.M. Voith Gmbh, 7920 Heidenheim Vorrichtung zum auftragen einer fluessigkeit auf eine laufende bahn
DE3609383C2 (de) * 1986-03-20 1995-04-06 Voith Gmbh J M Einrichtung zur Beschichtung von laufenden Warenbahnen
AT396437B (de) * 1986-10-25 1993-09-27 Voith Gmbh J M Vordosiereinrichtung in einer streichanlage
DE4230241C2 (de) * 1992-09-10 1994-07-14 Voith Gmbh J M Auftragswerk zur Beschichtung von Bahnen aus Papier oder Karton
FI93665C (fi) * 1992-11-13 1995-05-10 Valmet Paper Machinery Inc Menetelmä ja laitteisto paperirainan päällystämiseksi

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1030168B (de) * 1951-09-07 1958-05-14 John Waldron Corp Vorrichtung zum Anblasen von Werkstoff-, insbesondere von mit Farbmasse ueberzogenenPapierbahnen
GB1059206A (en) * 1964-04-13 1967-02-15 Du Pont Improvements in or relating to air knives
GB2174625A (en) * 1985-05-09 1986-11-12 Cons Paper Inc Trailing blade web coater
US4697542A (en) * 1985-05-13 1987-10-06 The Kohler Coating Machinery Corporation Adjustable nozzle for coating equipment
DE3724374A1 (de) * 1986-07-25 1988-02-04 Valmet Paper Machinery Inc Kurzzeit-beschichtungsmaschine
WO1988004959A1 (fr) * 1987-01-05 1988-07-14 Beloit Corporation Dispositif et procede pour application d'enduit
EP0651095A1 (fr) * 1993-10-27 1995-05-03 Valmet Paper Machinery Inc. Procédé et dispositif pour enduire une bande en mouvement

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19733333A1 (de) * 1997-08-01 1999-02-04 Voith Sulzer Papiermasch Gmbh Vorrichtung zum direkten oder indirekten Auftragen eines flüssigen oder pastösen Auftragsmediums auf eine laufende Materialbahn, insbesondere aus Papier oder Karton
EP0967327A3 (fr) * 1998-06-22 2001-10-17 Voith Paper Patent GmbH Dispositif pour appliquer directement ou indirectement une enduction fluide ou pâteuse sur une bande en mouvement
US6372046B1 (en) 1998-06-22 2002-04-16 Voith Sulzer Papiertechnik Patent Gmbh Device for the direct or indirect application of a liquid or viscid coating medium onto a moving material web
WO2008133630A1 (fr) * 2007-04-30 2008-11-06 Hewlett-Packard Development Company, L.P. Procédé et appareil permettant l'impression d'un fluide sur un substrat
GB2460812A (en) * 2007-04-30 2009-12-16 Hewlett Packard Development Co Method and apparatus for printing fluid on a substrate
GB2460812B (en) * 2007-04-30 2010-09-15 Hewlett Packard Development Co Method and apparatus for printing fluid on a substrate
US8322824B2 (en) 2007-04-30 2012-12-04 Hewlett-Packard Development Company, L. P. Method and apparatus for printing fluid on a substrate

Also Published As

Publication number Publication date
AT409349B (de) 2002-07-25
ATA113195A (de) 2001-12-15
EP0752497A3 (fr) 1997-05-21

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