EP1105295B1 - Dispositif de poudrage de feuilles imprimees a l'aide d'une charge electrostatique - Google Patents

Dispositif de poudrage de feuilles imprimees a l'aide d'une charge electrostatique Download PDF

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Publication number
EP1105295B1
EP1105295B1 EP99934658A EP99934658A EP1105295B1 EP 1105295 B1 EP1105295 B1 EP 1105295B1 EP 99934658 A EP99934658 A EP 99934658A EP 99934658 A EP99934658 A EP 99934658A EP 1105295 B1 EP1105295 B1 EP 1105295B1
Authority
EP
European Patent Office
Prior art keywords
sheet
accordance
charging
pressure roller
paper
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99934658A
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German (de)
English (en)
Other versions
EP1105295A1 (fr
Inventor
Thomas Stober
Reiner Haas
Günter Hess
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.)
Weitmann and Konrad GmbH and Co KG
Original Assignee
Weitmann and Konrad GmbH and Co KG
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 Weitmann and Konrad GmbH and Co KG filed Critical Weitmann and Konrad GmbH and Co KG
Publication of EP1105295A1 publication Critical patent/EP1105295A1/fr
Application granted granted Critical
Publication of EP1105295B1 publication Critical patent/EP1105295B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/06—Powdering devices, e.g. for preventing set-off
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
    • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials

Definitions

  • the invention relates to a device for dusting printed sheets of paper or an equivalent material using a powder dusting device with the characteristics of the generic term of Claim 1.
  • a powder dusting device is known from DE 44 27 904 A1 with which powder is electrostatically charged, before it is inflated onto a printed sheet of paper becomes. Electrostatically charged powder adheres better on paper sheets, but the adhesion should still improve become.
  • DE 29 36 754 A1 describes a device for the electrostatic application of entrained gases Material particles known on a sheet of paper become. Doing so will near the sheet of paper electric field into which the material particles, especially powder is blown in. Because of the field lines the powder is directed onto the surface of the material web.
  • DE 31 35 220 A1 is an application device known from powder particles on printed sheets of paper become where the bow on the non-pollinating Side is electrostatically charged. This has the Advantage that the charging bars are relatively close to the paper sheet can be arranged, but the paper sheet itself acts as an insulator. An arrangement of the charging bar on the opposite, i.e. side of the paper to be pollinated is possible, but the charging stick can only be used with one a relatively large distance from the arch, because a Free space for the gripping rapier to be retained got to.
  • the invention has for its object a device to provide with which the printed sheet is more optimal can be pollinated.
  • part of the powdering process which also includes the electrostatic charging of the paper sheet is calculated out of the sheet delivery device laid.
  • the order of the powder is still in the delivery device instead. Due to the close proximity of the Charging device for the surface of the sheet to be powdered small bundled fields can be generated and on the Sheet of paper act and because of the small distances can the field strength exactly and thus the electrostatic Charging can be set accurately without it Discharges is coming.
  • the charging device as Charging bar is formed.
  • This charging stick can be used for one relatively easy to adapt to the paper quality, on the other hand, the distance of the charging rod to adjacent surface of the paper web is set very precisely become.
  • an exchange of the charging stick e.g. to Repair and / or maintenance purposes possible without any problems.
  • the Charging device in the area of the transport direction seen last impression roller of a rotary printing press intended.
  • This has the main advantage that the Paper web is held by the platen roller and both for the holder as well as for the transport of the bow in this area no gripper is required, so the Charger arranged relatively close to the sheet of paper can be.
  • the charging device lies on the counter-pressure roller directly opposite. This means that the paper sheet between the platen roller and the charger located.
  • ionizing bars before Charging bar one or more ionizing bars provided are. These ionizing bars are used for discharge or Preparation of the sheet before loading using the Charging bar.
  • the ionizing bars are with AC operated (about 6.5 kV) and serve mainly for an active discharge of the bow or the Sheet surface.
  • the charging stick is with DC voltage operated (about 12 kV).
  • the counter-pressure roller preferably consists of an electric one conductive material, e.g. made of metal, and is grounded.
  • the Charging device, especially the charging stick, is positive charges or sends out positive ions.
  • This structure has the essential advantage that one side of the sheet of paper can be grounded and on the other side of the Sheet of paper e.g. positive ions are applied and that negatively charged powder can be used.
  • the electrostatically charged sheet is then either electrostatically e.g. negatively charged powder or applied unloaded powder. Has at electrostatically charged powder the powder to charge opposite to the printed area of the paper sheet Charge.
  • the powder dusting device can be advantageous in front of a Bow roller can be arranged.
  • the Powder dusting device in front of the drying section be arranged.
  • the powdering device provided in front of a sheet braking device so that when braking the bow this already with powder is pollinated.
  • the charger creates the width of the sheet adapted electrostatic field, the field to the Width of the arch is customizable. This way, at processing of narrow sheet damage e.g. the Back pressure roller or other machine equipment be prevented.
  • reference numeral 1 is one Sheet delivery device referred to the last Counter-pressure roller 2 of a printing machine, not shown, e.g. a rotary printing press.
  • a printing machine e.g. a rotary printing press.
  • the Sheet delivery device 1 serves the purpose of the Printing machine coming, printed paper sheets 4 into one To stack piles on top of each other.
  • the Sheet delivery device 1 in a manner known per se two mutually spaced, endless gripper chains 5, which are connected by transverse gripper carriages. The length of this measured transversely to the plane of the drawing in FIG.
  • Each gripper carriage has a gripper 6, which too transporting paper sheets 4 at the front edge, as shown in Figure 2.
  • the paper sheets 4 are dragged along by the grippers 6 so that the printed sheet side 7 ( Figure 2) shows the gripper 6, so that it is facing up in the stack.
  • the Sheet delivery device 1 a powder dusting device 8 on, which is shown only schematically in Figure 1. With this powder dusting device 8 is on the pasted sheets of paper inflated 4 powders. The Powder dusting device 8 is at a distance from Sheet of paper 4 on which the gripper 6 runs past allows. This distance can be up to 15 cm.
  • the charging device 11 is the one in FIG. 2 illustrated embodiment from a charging rod 15 and two ionizing bars 18 which are connected to the charging bar 15 are upstream to unload the sheet 4 bw. for the Prepare for charging.
  • FIG. 3 shows a section of the counter-pressure roller 2 which the sheet of paper 4 rests.
  • the platen roller 2 is grounded at 13.
  • the counter-pressure roller 2 consists of an electrically conductive material so that the printed sheet side 7 opposite sheet side 14 with the ground 13 is connected flat.
  • the charging bar 15 shows the charging bar 15 recognizable.
  • This charging stick 15 e.g. positively charged ions 16 in the direction of passing sheet of paper 4. These positive ions 16 accumulate on the printed sheet side 7, whereby 14 negative ions 17 on the unprinted sheet side accumulate.
  • FIG. 4 shows the paper sheet 4 immediately after the Transfer point 12, i.e. after the separation from the Counter pressure roller 5.
  • the two sheet sides 7 and 14 carry the positive ions 16 and the negative ions 17.
  • This Paper sheet 4 is now from the gripper 6 in the direction of Powder dusting device 8 transported, where then the Powder, which can be negatively charged, is inflated. It however, it is also conceivable to use unloaded powder.
  • the paper sheet 4 at the electrostatic charge preferably over the entire surface of the Back pressure roller 2 is applied, which in turn is grounded. On this way the whole unprinted sheet side 14 is during the electrostatic charge is grounded. Since the Charger 11 in the immediate vicinity of printed sheet side 7 is arranged, can be optimal Alignment of the electrical field and an exact Setting the field strength can be guaranteed. There immediately after the electrostatic charging of the Paper sheet 4 this is lifted from the backing roller 2 the load is taken before it is balanced is flowing away.
  • the powder can less loss and more targeted to the paper sheet 4 be applied.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Paper Feeding For Electrophotography (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)

Claims (17)

  1. Procédé pour la pulvérisation de feuilles imprimées (4), par exemple en papier, au moyen d'un dispositif de pulvérisation de poudre (8) qui est disposé à l'intérieur d'un dispositif de réception de feuilles (1), un dispositif de charge (11) étant associé à la feuille (4) pour une charge électrostatique, caractérisé en ce que le dispositif de charge (11) est prévu à l'extérieur du dispositif de réception de feuilles, (1) avant que la feuille (4) ne pénètre dans le dispositif de réception de feuilles (1), à un endroit qui est voisin de la face imprimée de la feuille (4).
  2. Dispositif selon la revendication 1, caractérisé en ce que le dispositif de charge (11) est constitué par une barre de charge (15).
  3. Dispositif selon la revendication 2, caractérisé en ce qu'une ou plusieurs barres d'ionisation (18) sont branchées en amont du dispositif de charge (11).
  4. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif de charge (11) est disposé au voisinage immédiat de la face imprimée de la feuille (4).
  5. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif de charge (11) est prévu dans la zone du rouleau de contre-pression (2) d'une presse rotative à imprimer, disposé le plus en aval dans le sens du transport.
  6. Dispositif selon la revendication 5, caractérisé en ce que le dispositif de charge (11) est opposé au rouleau de contre-pression (2).
  7. Dispositif selon la revendication 5 ou 6, caractérisé en ce que le dispositif de charge (11) est prévu juste avant la zone de séparation (12) de la feuille (4) du rouleau de contre-pression (2).
  8. Dispositif selon l'une quelconque des revendications 5 à 7, caractérisé en ce que le rouleau de contre-pression (2) est en métal et est mis à la terre et en ce que le dispositif de charge (11), en particulier une barre de charge (15), est, de préférence, chargé de manière positive ou, de préférence, émet des ions positifs.
  9. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que, lors de la charge électrostatique de la feuille (4), cette dernière est mise à la masse.
  10. Dispositif selon l'une quelconque des revendications 5 à 9, caractérisé en ce que la feuille (4) n'effectue, lors de charge électrostatique, aucun mouvement relatif par rapport à la masse.
  11. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que, sur la feuille (4), on dépose de la poudre chargée de manière électrostatique ou non chargée.
  12. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif de pulvérisation de poudre (8) est disposé devant un dérouleur de feuilles.
  13. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif de pulvérisation de poudre (8) est disposé devant une ligne de séchage.
  14. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif de pulvérisation de poudre (8) est prévu devant un dispositif de freinage de la feuille.
  15. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que, lorsqu'elle a été libérée du rouleau de contre-pression (2), la feuille (4) est guidée essentiellement sur des coussins d'air.
  16. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le dispositif de charge (11) fournit un champ électrostatique adapté à la largeur de la feuille (4).
  17. Dispositif selon la revendication 16, caractérisé en ce que le champ peut être adapté à la largeur d'une feuille (4).
EP99934658A 1998-08-10 1999-07-10 Dispositif de poudrage de feuilles imprimees a l'aide d'une charge electrostatique Expired - Lifetime EP1105295B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19836022A DE19836022A1 (de) 1998-08-10 1998-08-10 Vorrichtung zum Bestäuben von bedruckten Bogen aus Papier o. dgl.
DE19836022 1998-08-10
PCT/EP1999/004864 WO2000009337A1 (fr) 1998-08-10 1999-07-10 Dispositif de poudrage de feuilles imprimees a l'aide d'une charge electrostatique

Publications (2)

Publication Number Publication Date
EP1105295A1 EP1105295A1 (fr) 2001-06-13
EP1105295B1 true EP1105295B1 (fr) 2002-11-27

Family

ID=7876969

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99934658A Expired - Lifetime EP1105295B1 (fr) 1998-08-10 1999-07-10 Dispositif de poudrage de feuilles imprimees a l'aide d'une charge electrostatique

Country Status (5)

Country Link
US (1) US6648972B1 (fr)
EP (1) EP1105295B1 (fr)
JP (1) JP2002522277A (fr)
DE (2) DE19836022A1 (fr)
WO (1) WO2000009337A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2003941A2 (fr) 2007-06-14 2008-12-17 manroland AG Composants fonctionnels fabriqués selon une technique d'impression

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DE10020179A1 (de) 2000-04-25 2001-11-08 Daimler Chrysler Ag Steuereinheit für ein Gleitschirm-System für den bemannten Gleitschirm-Flug sowie zugehörige Missionsplanungsstation
DE10038774A1 (de) 2000-06-09 2001-12-13 Heidelberger Druckmasch Ag Vorrichtung zur Erzeugung eines Luftstromes in einer Vervielfältigungsmaschine
FI118542B (fi) * 2002-03-14 2007-12-14 Metso Paper Inc Pintakäsittelyprosessi
FI121039B (fi) * 2002-03-14 2010-06-15 Metso Paper Inc Maadoituselektrodi ja menetelmä jossa sitä käytetään
DE10254424A1 (de) * 2002-11-21 2004-06-03 Lucas Automotive Gmbh System zur Beeinflussung der Geschwindigkeit eines Kraftfahrzeuges
DE102005032801B4 (de) * 2005-07-14 2010-07-01 Manroland Ag Verfahren und Vorrichtung zum Bepudern von Bedruckstoffen
CN101045365A (zh) * 2006-03-28 2007-10-03 海德堡印刷机械股份公司 用于将粉末施加到印张上的装置
DE102009026569A1 (de) 2009-03-19 2010-09-23 Koenig & Bauer Aktiengesellschaft Oberflächenbehandlungsvorrichtung in einer bogenverarbeitenden Maschine und ein Verfahren hierzu
WO2011030644A1 (fr) * 2009-09-14 2011-03-17 株式会社コスモテック Dispositif de dispersion de poudre pour impression
DE202009016037U1 (de) 2009-11-24 2010-02-25 Manroland Ag Vorrichtung zum Bepudern von Bedruckstoffen
DE102012103342A1 (de) 2012-04-17 2013-10-17 Océ Printing Systems GmbH & Co. KG Verfahren zum Betreiben eines Digitaldruckers unter Beaufschlagung einer Gegendruckwalze mit elektrischen Ladungen sowie zugehöriger Digitaldrucker
DE102019118571B4 (de) * 2019-07-09 2022-05-25 Koenig & Bauer Ag Bogenverarbeitende Maschine und Verfahren zum Fördern von Bogen
DE102019118565B4 (de) 2019-07-09 2022-07-21 Koenig & Bauer Ag Bogenverarbeitende Maschine und Verfahren zum Fördern von Bogen
DE102019118566B4 (de) 2019-07-09 2022-07-14 Koenig & Bauer Ag Bogenverarbeitende Maschine und Verfahren zum Fördern von Bogen
DE102019118569B4 (de) * 2019-07-09 2022-05-12 Koenig & Bauer Ag Bogenverarbeitende Maschine und Verfahren zum Fördern von Bogen

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2003941A2 (fr) 2007-06-14 2008-12-17 manroland AG Composants fonctionnels fabriqués selon une technique d'impression
EP2003940A2 (fr) 2007-06-14 2008-12-17 manroland AG Composants fonctionnels fabriqués selon une technique d'impression
DE102007027473A1 (de) 2007-06-14 2008-12-18 Manroland Ag Drucktechnisch hergestellte funktionale Komponenten

Also Published As

Publication number Publication date
DE19836022A1 (de) 2000-02-17
JP2002522277A (ja) 2002-07-23
WO2000009337A1 (fr) 2000-02-24
EP1105295A1 (fr) 2001-06-13
US6648972B1 (en) 2003-11-18
DE59903568D1 (de) 2003-01-09

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