EP0350606A2 - Dispositif d'humification d'un substrat mobile - Google Patents

Dispositif d'humification d'un substrat mobile Download PDF

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Publication number
EP0350606A2
EP0350606A2 EP89109445A EP89109445A EP0350606A2 EP 0350606 A2 EP0350606 A2 EP 0350606A2 EP 89109445 A EP89109445 A EP 89109445A EP 89109445 A EP89109445 A EP 89109445A EP 0350606 A2 EP0350606 A2 EP 0350606A2
Authority
EP
European Patent Office
Prior art keywords
charging
substrate
atomizer
endless belt
voltage source
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
EP89109445A
Other languages
German (de)
English (en)
Other versions
EP0350606B1 (fr
EP0350606A3 (en
Inventor
Ernst-August Hahne
Hermann Künzig
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.)
Eltex Elektrostatik GmbH
Original Assignee
Eltex Elektrostatik 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 Eltex Elektrostatik GmbH filed Critical Eltex Elektrostatik GmbH
Priority to AT89109445T priority Critical patent/ATE93168T1/de
Publication of EP0350606A2 publication Critical patent/EP0350606A2/fr
Publication of EP0350606A3 publication Critical patent/EP0350606A3/de
Application granted granted Critical
Publication of EP0350606B1 publication Critical patent/EP0350606B1/fr
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
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/08—Plant for applying liquids or other fluent materials to objects
    • B05B5/14—Plant for applying liquids or other fluent materials to objects specially adapted for coating continuously moving elongated bodies, e.g. wires, strips, pipes

Definitions

  • the invention relates to a device according to the preamble of the main claim.
  • Substrates such as foils, papers and boxes are wetted by spraying small water droplets (aerosols). After being applied to the surface, the water droplets then diffuse as moisture, more or less strongly into the substrate.
  • the spraying of aerosols creates clouds from this aerosol, which only partially reach the surface of the substrate, on the one hand due to the spraying behavior of the nozzles and on the other hand due to the air movement parallel to the moving substrate.
  • the water droplets undesirably vagabond in the device space and can even be deposited on the device part.
  • the electrical field acts on the conductive aerosol generator due to the build-up of a strong electrical field that originates from a conductive plate applied to a high voltage.
  • the aerosols are aligned in the electric field and move along the lines of force in the direction of the high-voltage plate.
  • the electrical field now acts through the substrate to be moistened.
  • all aerosols are aligned in the direction of the high-voltage plate and can no longer vagabond in the room. This behavior changes
  • substrates with a higher pre-moisture or other conductivity must be moistened, through which the conductivity of the substrate immediately increases, whereby the penetration of the electrical field through the substrate to the conductive aerosol generator is reduced or even completely prevented. As a result, the aerosols are no longer aligned with the electrically high-tension plate.
  • the invention has for its object to provide a generic device according to the preamble of the main claim with always good and independent of the pre-humidity efficiency.
  • the back of the substrate is either charged by a charge-emitting charging electrode — contactlessly — or the top of an endless belt is provided with a charge, so that the electrical field forces from the charged substrate act all the more on the atomizer. so that the vagabonding of the aerosols becomes impossible.
  • the electrical field strength is so high that the mirror image of the high voltage is generated on the grounded metallic surface of the aerosol dispenser by influence and the detached aerosols are charged with the opposite polarity of the charging electrode so that they are charged accelerated and aligned, making them unlike the known devices not only wet the surface of the substrate, but can penetrate into the pores of the substrate.
  • an endless belt runs as an electrode device on insulated deflection rollers and its movement is matched to the speed of the substrate, so it has no relative speed to the substrate with the strand which is in contact with the substrate.
  • the high voltage is sprayed on contact or contactlessly by corona charging, but can also be applied by sandwich deflection rollers for the endless belt in such a way that the coating of at least one deflection roller is conductive on the surface and the high voltage transmission takes place via contact roller.
  • the first embodiment according to FIG. 1 is denoted overall by 5 and serves to moisten a substrate 6 in the form of a circumferential path, preferably of paper, which is moistened by means of an atomizer 7 with a total of 8 small water droplets, namely aerosols.
  • a charging device is provided which has a continuous endless belt 9, which is electrically conductive on its upper side 17 and electrically insulated on its underside 18, which faces the rear 10 of the substrate and bears against it with one strand 11 and rotates at zero relative speed .
  • a charging part 12 is provided for the top 17 of the endless belt 9 in the form of a contact roller 12, which is connected to the anode of a voltage source, generally designated 13, the other side of which is grounded.
  • the endless belt 9 also has deflecting rollers 14 which are electrically insulated from the ground for insulation and the contact roller 12 is provided on a deflecting roller 14 in the wrapping region of the endless belt 9.
  • the resulting field course of the electric field between the atomizer 7 and the one strand 11 of the endless belt 9 is indicated approximately in the delimited area 15.
  • the second alternative embodiment according to FIG. 2 has four individual emission charging electrodes 20 on the back 10 of the substrate 6 instead of the endless circulating belt 9 with the associated charging device, all of which - in the exemplary embodiment shown - are connected to the high-voltage source 13, of which but each can also be connected individually to a high-voltage source in such a way that the potential can be regulated separately.
  • the charge is applied to the back 10 of the substrate by direct contact, in the present embodiment according to FIG. 2 it is applied contactlessly by the emission charging electrodes 20.
  • the deflection rollers are provided with an insulating surface to maintain the charge on the substrate.

Landscapes

  • Electrostatic Spraying Apparatus (AREA)
  • Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)
  • Elimination Of Static Electricity (AREA)
  • Manufacturing Of Printed Wiring (AREA)
EP89109445A 1988-07-13 1989-05-24 Dispositif d'humification d'un substrat mobile Expired - Lifetime EP0350606B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89109445T ATE93168T1 (de) 1988-07-13 1989-05-24 Vorrichtung zum befeuchten eines bewegten substrates.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3823739 1988-07-13
DE3823739A DE3823739A1 (de) 1988-07-13 1988-07-13 Vorrichtung zum befeuchten eines bewegten substrates

Publications (3)

Publication Number Publication Date
EP0350606A2 true EP0350606A2 (fr) 1990-01-17
EP0350606A3 EP0350606A3 (en) 1990-10-24
EP0350606B1 EP0350606B1 (fr) 1993-08-18

Family

ID=6358589

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89109445A Expired - Lifetime EP0350606B1 (fr) 1988-07-13 1989-05-24 Dispositif d'humification d'un substrat mobile

Country Status (4)

Country Link
EP (1) EP0350606B1 (fr)
JP (1) JPH0271861A (fr)
AT (1) ATE93168T1 (fr)
DE (2) DE3823739A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0437383A1 (fr) * 1990-01-12 1991-07-17 Regie Nationale Des Usines Renault S.A. Procédé et dispositif de peinture électrostatique sur pièces plastiques
WO1998009734A1 (fr) * 1996-09-06 1998-03-12 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Procede et dispositif d'enduction electrostatique pour substrats
DE19950009B4 (de) * 1999-10-18 2012-11-22 Eltex-Elektrostatik Gmbh Vorrichtung zum Befeuchten einer Materialbahn
US8979004B2 (en) 2009-03-09 2015-03-17 Illinois Tool Works Inc. Pneumatic atomization nozzle for web moistening
US9186881B2 (en) 2009-03-09 2015-11-17 Illinois Tool Works Inc. Thermally isolated liquid supply for web moistening

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4227136C3 (de) * 1992-08-17 1998-08-13 Weitmann & Konrad Fa Verfahren und Vorrichtung zum Befeuchten einer bedruckten und anschließend thermisch getrockneten, bewegten Materialbahn, insbesondere Papierbahn
DE102008050899B4 (de) * 2008-09-25 2013-03-28 Gerhard Bach Vorrichtung zum Befeuchten von flexiblem Flachmaterial
CN102806161A (zh) * 2011-05-30 2012-12-05 张家港市佳龙真空浸漆设备制造厂 非导电卷材连续静电喷漆设备

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB923684A (en) * 1959-02-20 1963-04-18 Licentia Gmbh An electrostatic spraying installation
DE2219994A1 (de) * 1972-04-24 1973-11-08 Voith Gmbh J M Vorrichtung zum auftragen von fluessigen oder pulverfoermigen mitteln auf eine laufende papierbahn
DE2841395A1 (de) * 1978-09-22 1980-03-27 Brueckner Trockentechnik Kg Vorrichtung zum elektrostatischen bespruehen eines flaechigen gegenstandes
EP0131182A1 (fr) * 1983-06-28 1985-01-16 P.C.M. PROGETTAZIONE COSTRUZIONE MACCHINE di Luigi PECIS & C. S.n.c. Appareil pour appliquer des substances liquides sur des éléments en feuille continue, comme des étoffes, des peaux et similaires
EP0233723A2 (fr) * 1986-02-10 1987-08-26 Nordson Corporation Appareil de pulvérisation électrostatique de poudre sur un tissu

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE813016C (de) * 1946-09-04 1951-09-06 Philips Nv Transportvorrichtung fuer Papier und aehnliche Stoffe
JPS5041144Y2 (fr) * 1971-05-21 1975-11-22
JPS4846630A (fr) * 1971-10-15 1973-07-03
US3910475A (en) * 1973-03-15 1975-10-07 Xerox Corp System for electrically grounding or biasing a member
JPS5950797B2 (ja) * 1978-05-29 1984-12-10 神崎製紙株式会社 紙の加湿方法

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB923684A (en) * 1959-02-20 1963-04-18 Licentia Gmbh An electrostatic spraying installation
DE2219994A1 (de) * 1972-04-24 1973-11-08 Voith Gmbh J M Vorrichtung zum auftragen von fluessigen oder pulverfoermigen mitteln auf eine laufende papierbahn
DE2841395A1 (de) * 1978-09-22 1980-03-27 Brueckner Trockentechnik Kg Vorrichtung zum elektrostatischen bespruehen eines flaechigen gegenstandes
EP0131182A1 (fr) * 1983-06-28 1985-01-16 P.C.M. PROGETTAZIONE COSTRUZIONE MACCHINE di Luigi PECIS & C. S.n.c. Appareil pour appliquer des substances liquides sur des éléments en feuille continue, comme des étoffes, des peaux et similaires
EP0233723A2 (fr) * 1986-02-10 1987-08-26 Nordson Corporation Appareil de pulvérisation électrostatique de poudre sur un tissu

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0437383A1 (fr) * 1990-01-12 1991-07-17 Regie Nationale Des Usines Renault S.A. Procédé et dispositif de peinture électrostatique sur pièces plastiques
WO1998009734A1 (fr) * 1996-09-06 1998-03-12 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Procede et dispositif d'enduction electrostatique pour substrats
DE19950009B4 (de) * 1999-10-18 2012-11-22 Eltex-Elektrostatik Gmbh Vorrichtung zum Befeuchten einer Materialbahn
US8979004B2 (en) 2009-03-09 2015-03-17 Illinois Tool Works Inc. Pneumatic atomization nozzle for web moistening
US9186881B2 (en) 2009-03-09 2015-11-17 Illinois Tool Works Inc. Thermally isolated liquid supply for web moistening

Also Published As

Publication number Publication date
ATE93168T1 (de) 1993-09-15
EP0350606B1 (fr) 1993-08-18
JPH0271861A (ja) 1990-03-12
DE58905308D1 (de) 1993-09-23
EP0350606A3 (en) 1990-10-24
DE3823739A1 (de) 1990-01-18

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