EP0351504B1 - Electrostatic printing aid - Google Patents

Electrostatic printing aid Download PDF

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Publication number
EP0351504B1
EP0351504B1 EP89108050A EP89108050A EP0351504B1 EP 0351504 B1 EP0351504 B1 EP 0351504B1 EP 89108050 A EP89108050 A EP 89108050A EP 89108050 A EP89108050 A EP 89108050A EP 0351504 B1 EP0351504 B1 EP 0351504B1
Authority
EP
European Patent Office
Prior art keywords
coil
bar magnets
printing aid
printing
primary coil
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
EP89108050A
Other languages
German (de)
French (fr)
Other versions
EP0351504A2 (en
EP0351504A3 (en
Inventor
Franz Knopf
Ernst A. 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 AT89108050T priority Critical patent/ATE77790T1/en
Publication of EP0351504A2 publication Critical patent/EP0351504A2/en
Publication of EP0351504A3 publication Critical patent/EP0351504A3/en
Application granted granted Critical
Publication of EP0351504B1 publication Critical patent/EP0351504B1/en
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
    • B41F9/00—Rotary intaglio printing presses
    • B41F9/001—Heliostatic printing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S101/00—Printing
    • Y10S101/37—Printing employing electrostatic force

Definitions

  • a rectifier circuit 22 and a smoothing circuit 23 are also provided on the secondary side of the first receiving device 13, and their output is connected to the metal coating 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Printing Methods (AREA)
  • Photoreceptors In Electrophotography (AREA)
  • Rotary Presses (AREA)
  • Developing Agents For Electrophotography (AREA)
  • Coils Of Transformers For General Uses (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Abstract

An impression roller (5) of a printing unit equipped with an electrostatic printing aid has on its insulation surface a conductive coating (10), above which a further, limitedly conductive coating (11) is arranged. Arranged fixedly in relation to the printing unit, concentrically relative to the electrically earthed axle or shaft (6) of the impression roller (5) and next to the latter is a primary spool (17) and mounted fixedly in relation to the impression roller (5) concentrically to the electrically earthed shaft (6) of the impression roller (5) on one of its front sides (12) is a secondary spool (14). The one connection of the secondary spool (14) or shaft (6) and the other connected [sic] to the coating (10) via a rectifier circuit (22). <IMAGE>

Description

Die Erfindung betrifft eine Druckhilge gemäß dem Oberbegriff des Hauptanspruchs.The invention relates to a printing aid according to the preamble of the main claim.

Druckhilfen dieser Art sind in einer Vielzahl von Ausführungsformen bekannt. Sie dienen dazu, im Druckspalt zwischen der dem Presseur zugeordneten Formwalze ein elektrostatisches Feld aufzubauen, um mittels dem eine bessere Farbübertragung auf die in dem Druckspalt laufende Bahn, vorzugsweise Papierbahn zu bewirken.Printing aids of this type are known in a large number of embodiments. They serve to build up an electrostatic field in the printing nip between the forming roller assigned to the impression roller, in order to effect a better ink transfer to the web running in the printing nip, preferably paper web.

Allen Druckhilfen haftet der Nachteil an, daß sie aufwendig herzustellen sind und zum Teil nicht mehr an vorhandenen Druckwerken nachgerüstet werden können.All printing aids have the disadvantage that they are expensive to manufacture and some of them can no longer be retrofitted to existing printing units.

Der Erfindung liegt deshalb die Aufgabe zugrunde, eine gattungsgemäße elektrostatische Druckhilfe gemäß dem Oberbegriff des Hauptanspruchs einfacher und so auszugestalten, daß damit auch nachträglich Druckwerke ausgerüstet werden können.The invention is therefore based on the object of simplifying a generic electrostatic printing aid according to the preamble of the main claim and in such a way that printing units can also be retrofitted therewith.

Diese Aufgabe wird bei einer Druckhilfe gemäß des Oberbegriffs des Hauptanspruchs erfindungsgemäß durch dessen kennzeichnende Merkmale gelöst.This object is achieved according to the invention in a printing aid according to the preamble of the main claim by its characterizing features.

Mit dem erfindungsgemäßen Prinzip wird also mit anderen Worten ein zweigeteilter Transformator verwendet, dessen Primärseite druckwerkfest und dessen Sekundärseite drehfest zu dem Presseur mit diesem umläuft. Die in der Sekundärspule induzierte Spannung wird gleichgerichtet und mittels einer Glättungsschaltung geglättet und dann auf den Metallbelag des Presseurs übertragen. Mit besonderem Vorteil entstehen nicht an den Leiter gebundene elektrische Ladungen und sind auch keine Elektroden zum Aufladen der Oberfläche des Presseurs erforderlich, so daß insbesondere der Einsatz in explosionsgeschützten Räumen zweckmäßig erscheint. Außerdem können in einfacher Weise bekannte Druckanlagen nachgerüstet werden, indem nur ein erfindungsgemäß aufgebauter Presseur eingesetzt und an dessen eine Stirnseite die Sekundärspule angebracht und auf der Achse bzw. Welle des Presseurs, je nachdem ob der Presseur um die Achse herum angetrieben oder starr mit dieser verbunden als Welle umläuft, die Primärspule angeordnet ist.In other words, with the principle according to the invention, a two-part transformer is used, the primary side of which rotates with the printing unit and the secondary side rotatably with the impression roller. The voltage induced in the secondary coil is rectified and smoothed using a smoothing circuit and then transferred to the metal surface of the impression roller. Electrical charges and which are not bound to the conductor are particularly advantageous there are also no electrodes required to charge the surface of the impression roller, so that use in explosion-proof rooms in particular appears expedient. In addition, known printing systems can be retrofitted in a simple manner by using only a impression roller constructed according to the invention and on one end face of which the secondary coil is attached and on the axis or shaft of the impression roller, depending on whether the impression roller is driven around the axis or rigidly connected to it revolves as a shaft, the primary coil is arranged.

Mittels zweier zusätzlicher Wicklungen läßt sich dann in einfacher Weise die sekundärseitig wirksame Spannung wieder zurückinduzieren, so daß über diesen Meßübertrager eine Regelung der induzierten Spannung in der Sekundärspule möglich ist.By means of two additional windings, the voltage effective on the secondary side can then be induced back in a simple manner, so that regulation of the induced voltage in the secondary coil is possible via this measuring transformer.

In alternativer oder zusätzlicher Ausgestaltung der Erfindung können die Primär- und Sekundärspule sowie zweite Primär- und zweite Sekundärspulen aus einer Anzahl von Teilspulen bestehen, die jeweils auf Stabmagnete aufgewickelt sind, wobei einander durch den Spalt gegenüberliegende Stabmagnete, die sämtlich parallel zur Achse des Presseurs verlaufen, gegenständig zueinander angeordnet sind. Außerdem sind die der Primärspule und der zweiten Primärspule zugeordnete Stabmagnete mit verschiedenen radialen Abstand von der Achse des Presseurs angeordnet, ebenso wie die Sekundärspule und die zweite Sekundärspule. Durch diese Anordnung wird durch die Relativgeschwindigkeit zwischen den Primärund Sekundärspulen eine magnetische Induktion erzeugt. Außerdem kann der Belag über eine Spannungsvervielfacherschaltung angeschlossen sein.In an alternative or additional embodiment of the invention, the primary and secondary coils as well as second primary and second secondary coils can consist of a number of partial coils, each of which is wound on bar magnets, with bar magnets lying opposite one another through the gap, all of which run parallel to the axis of the impression roller , are arranged opposite to each other. In addition, the bar magnets assigned to the primary coil and the second primary coil are arranged at different radial distances from the axis of the impression roller, as are the secondary coil and the second secondary coil. This arrangement creates a magnetic induction due to the relative speed between the primary and secondary coils. The covering can also be connected via a voltage multiplier circuit.

Zweckmäßige Ausgestaltungen und Weiterbildungen der Erfindung sind in den Unteransprüchen gekennzeichnet.Expedient refinements and developments of the invention are characterized in the subclaims.

Ein bevorzugtes Ausführungsbeispiel der Erfindung wird nachfolgend unter Bezugnahme auf die Zeichnung näher erläutert. In dieser zeigt:

  • Figur 1 einen schematischen Querschnitt durch einen Presseur, in teilweise abgebrochener und ausgebrochener Darstellung;
  • Figur 2 das elektrische Schaltbild der Anordnung gemäß Figur 1.
A preferred embodiment of the invention is explained in more detail below with reference to the drawing. In this shows:
  • 1 shows a schematic cross section through an impression roller, in a partially broken and broken-away representation;
  • FIG. 2 shows the electrical circuit diagram of the arrangement according to FIG. 1.

Der Presseur 5 weist in Figur 1 eine Welle 6 auf, auf der er drehfest angeordnet ist, die gemäß Richtungspfeil 7 umläuft und, wie schematisch mit 9 angeordnet, geerdet ist.The impression roller 5 in FIG. 1 has a shaft 6 on which it is arranged in a rotationally fixed manner, which rotates according to the directional arrow 7 and, as schematically arranged at 9, is grounded.

Der Presseur ist im Bereich 8 in üblicher Art und Weise aufgebaut und weist darüber hinausgehend auf seinem Isoliermantel einen Metallbelag 10 auf. Über den Metallbelag 10 ist ein weiterer begrenzt leitfähiger Belag 11 angebracht.The impression roller is constructed in the usual way in the area 8 and also has a metal covering 10 on its insulating jacket. Another limited conductive covering 11 is attached over the metal covering 10.

Konzentrisch zur Welle 6 des Presseurs 5 ist neben diesem auf einer Stirnseite 12 eine insgesamt mit 13 bezeichnete erste Aufnahmevorrichtung als magnetisierbarer Kern mit einer Sekundärspule 14 sowie eine zweite Sekundärspule 15 jeweils konzentrisch zur Welle 6 angeordnet.Concentric to the shaft 6 of the impression roller 5, in addition to the latter, a first receiving device, generally designated as 13, as a magnetizable core with a secondary coil 14 and a second secondary coil 15 are each arranged concentrically to the shaft 6 on an end face 12.

Ferner ist konzentrisch zu der Welle 6 eine weitere Aufnahmevorrichtung 16 als magnetisierbarer Kern zur Aufnahme einer ebenfalls zur Welle 6 konzentrischen Primärspule 17 mit den elektrischen Anschlüssen 1 und 2 sowie eine zwischen dieser und der Welle 6 angeordneten zweiten Primärspule 18 mit den elektrischen Anschlüssen 3 und 4 angeordnet. Die Vorrichtung 16 ist mittels eines Zapfens 19, der in eine bezüglich des Druckwerks feste Verankerung 20 eingreift, bezüglich der Welle 6 drehbar und weist auf seiner Innenseite ein insgesamt mit 21 bezeichnetes Kugellager bezüglich der Welle 6 auf, so daß sich diese zwar drehen kann, der magnetisierbare Kern jedoch infolge des Zapfens 19 und der Ankervorrichtung 20 bezüglich der Vorrichtung drehfest gehalten werden kann.Furthermore, concentric to the shaft 6 is a further receiving device 16 as a magnetizable core for receiving a primary coil 17, likewise concentric to the shaft 6, with the electrical connections 1 and 2 and one arranged between the latter and the shaft 6 second primary coil 18 with the electrical connections 3 and 4 arranged. The device 16 can be rotated with respect to the shaft 6 by means of a pin 19 which engages in an anchoring 20 which is fixed with respect to the printing unit and has on its inside a ball bearing, generally designated 21, with respect to the shaft 6, so that it can rotate, however, the magnetizable core can be held in a rotationally fixed manner with respect to the device due to the pin 19 and the anchor device 20.

Auf der Sekundärseite der ersten Aufnahmevorrichtung 13 ist ferner noch eine Gleichrichterschaltung 22 sowie eine Glättungsschaltung 23 vorgesehen, die mit ihrem Ausgang mit dem Metallbelag 10 verbunden ist.A rectifier circuit 22 and a smoothing circuit 23 are also provided on the secondary side of the first receiving device 13, and their output is connected to the metal coating 10.

Das genaue Schaltbild ist in Figur 2 dargestellt.The exact circuit diagram is shown in Figure 2.

So ist ersichtlich, daß der eine elektrische Anschluß 2 der Primärspule 17 geerdet ist, wohingegen der Anschluß 1 an einen Hochspannungsgenerator 30 mit einer variablen Wechselspannung und einer Frequenz von vorzugsweise 10 kHz angeschlossen ist. Die Wechselspannungsquelle 30 ist mit einem Anschluß 31 geerdet.It can thus be seen that one electrical connection 2 of the primary coil 17 is grounded, whereas the connection 1 is connected to a high-voltage generator 30 with a variable AC voltage and a frequency of preferably 10 kHz. The AC voltage source 30 is grounded with a connection 31.

Die beiden elektrischen Anschlüsse 3 und 4 der zweiten Primärspule 18 sind an die Eingänge einer Regelung 32 der variablen Wechselspannungsquelle 30 angeschlossen und kann deren Größe der Ausgangsspannung und/oder deren Frequenz - in an sich bekannter Weise - ändern.The two electrical connections 3 and 4 of the second primary coil 18 are connected to the inputs of a controller 32 of the variable AC voltage source 30 and can change their size of the output voltage and / or their frequency - in a manner known per se.

Die Sekundärspule 14 ist mit ihrer einen Seite geerdet, wie das in Figur 2 mit "9" schematisch bezeichnet ist. Dasselbe gilt für die zweite Sekundärspule 15. Beide Sekundärspulen 14, 15 sind parallel geschaltet. Beiden Spulen ist zunächst eine Gleichrichterschaltung 22 zum Gleichrichten des Wechselstromes nachgeordnet. Hinter der Gleichrichterschaltung 22 ist eine Glättungsschaltung 23 mit einem LC-Filter, wie an sich bekannt, nachgeordnet. Der Ausgang der Glättungsschaltung 23 ist mit dem Metallbelag 10 des Presseurs 5 verbunden.The secondary coil 14 is grounded on one side, as is schematically designated by "9" in FIG. The same applies to the second secondary coil 15. Both secondary coils 14, 15 are connected in parallel. A rectifier circuit 22 for rectifying the alternating current is initially arranged downstream of both coils. Behind the rectifier circuit 22 is a smoothing circuit 23 downstream with an LC filter, as is known per se. The output of the smoothing circuit 23 is connected to the metal coating 10 of the impression roller 5.

Im Betrieb sind die Primärspule 17 und die Sekundärspule 14 zueinander bewegt. Über den Luftspalt zwischen den beiden magnetisierbaren Kernen 13 und 16 kann also die Wechselspannung in der Primärspule 17 eine Sekundärspannung in der Sekundärspule 14 induzieren, die über die Gleichrichterschaltung 22 gleichgerichtet und die Glättungsschaltung 23 geglättet und in dieser Form direkt dem Metallbelag 11 zugeführt wird. Im umgekehrten Sinne wird die induzierte Spannung der Sekundärspule 14 durch die zweite Sekundärspule 15 abgenommen und auf die zweite Primärspule 18 im umgekehrten Sinne induziert, die mit ihren elektrischen Anschlüssen 3 und 4 an die Steuerung 32 angeschlossen ist. Diese steuert die Wechselspannungsquelle 30 dergestalt, daß beispielsweise stets an dem Metallbelag 10 die gleiche Gleichspannung liegt.In operation, the primary coil 17 and the secondary coil 14 are moved towards each other. Via the air gap between the two magnetizable cores 13 and 16, the alternating voltage in the primary coil 17 can induce a secondary voltage in the secondary coil 14, which is rectified via the rectifier circuit 22 and smoothed and smoothed and in this form fed directly to the metal coating 11. In the opposite sense, the induced voltage of the secondary coil 14 is taken off by the second secondary coil 15 and induced on the second primary coil 18 in the opposite sense, which is connected to the controller 32 with its electrical connections 3 and 4. This controls the AC voltage source 30 such that, for example, the same DC voltage is always applied to the metal coating 10.

40 stellt den magnetischen Kreis für die Energieübertragung dar.40 represents the magnetic circuit for energy transmission.

41 ist der magnetische Kreis für den Meßübertrager.41 is the magnetic circuit for the transmitter.

Claims (11)

1. An impression cylinder (5) which is fitted with an electrostatic printing aid, of a printing mechanism,
characterised in that on its insulating casing the impression cylinder (5) has a possibly homogeneous but conductive covering (10), preferably a metal covering, that arranged over the covering is a further, limitedly conductive covering (11), that a primary coil (17) is arranged fixedly (19, 20) with respect to the printing mechanism concentrically with respect to the electrically earthed (9) axis or shaft (6) of the impression cylinder (5) and beside the latter, that a secondary coil (14) is mounted fixedly with respect to the impression cylinder (5) concentrically with respect to the electrically earthed axis or shaft (6) of the impression cylinder (5) at the one end (12) of the latter, and that one connection of the secondary coil is connected to the axis or shaft (6) and its other connection is connected to the covering (10) by way of a rectifier circuit (22).
2. A printing aid according to claim 1
characterised in that provided between the rectifier circuit (22) and the metal covering (10) is a smoothing circuit (23) for the pulsating direct current.
3. A printing aid according to claim 1 or claim 2
characterised in that associated with the primary coil (17) is a second primary coil (18) and associated with the secondary coil (14) is a second secondary coil (15) which rotates therewith and which is connected in parallel therewith and which is disposed opposite the second primary coil (18).
4. A printing aid according to one of claims 1 to 3
characterised in that the primary coil (17) can be connected to an ac voltage source (30) with a frequency of 10 ± 5 kHz, which source is variable by way of a control means (32).
5. A printing aid according to one of claims 1 to 4
characterised in that the second primary coil (18) is connected to the input of the regulating means (32).
6. A printing aid in particular according to one of claims 1 to 5
characterised in that a plurality of first bar magnets are provided instead of the primary coil (17).
7. A printing aid according to claim 6
characterised in that the primary coil (17) comprises a number of coil portions which are wound on to the magnet, said number of coil portions corresponding to the number of bar magnets.
8. A printing aid according to one of claims 1 to 7
characterised in that the secondary coil (14) comprises a number of coil portions, which corresponds to the number of the first bar magnets, and the coil portions are wound on second bar magnets which are arranged in opposite relationship to the first ones.
9. A printing aid in particular according to one of claims 1 to 8 characterised in that the second primary coil (18) comprises a number of coil portions, which corresponds to the number of third bar magnets, each of the coil portions being wound on to one of the third bar magnets.
10. A printing aid according to one of claims 1 to 9 characterised in that the second secondary coil (15) comprises a number of coil portions, which corresponds to the number of the third bar magnets, and the coil portions are wound on to fourth bar magnets which are arranged in opposite relationship to the third bar magnets.
11. A printing aid according to one of claims 1 to 10 characterised in that the secondary coil (14) is possibly connected to the covering (10) by way of a voltage multiplier.
EP89108050A 1988-07-20 1989-05-03 Electrostatic printing aid Expired - Lifetime EP0351504B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89108050T ATE77790T1 (en) 1988-07-20 1989-05-03 ELECTROSTATIC PRINTING AID.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3824714 1988-07-20
DE3824714A DE3824714C1 (en) 1988-07-20 1988-07-20

Publications (3)

Publication Number Publication Date
EP0351504A2 EP0351504A2 (en) 1990-01-24
EP0351504A3 EP0351504A3 (en) 1990-03-21
EP0351504B1 true EP0351504B1 (en) 1992-07-01

Family

ID=6359180

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89108050A Expired - Lifetime EP0351504B1 (en) 1988-07-20 1989-05-03 Electrostatic printing aid

Country Status (5)

Country Link
US (1) US5044275A (en)
EP (1) EP0351504B1 (en)
JP (1) JP2526289B2 (en)
AT (1) ATE77790T1 (en)
DE (2) DE3824714C1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1034078B2 (en) † 1997-11-27 2005-08-17 Spengler Electronic AG Electrostatic arrangement for rotogravure and flexographic printing

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2677301B1 (en) * 1991-06-05 1993-12-24 Mira Sarl ELECTROSTATIC ASSISTANCE DEVICE FOR A PRINTING MACHINE ESPECIALLY HELIOGRAVURE.
US5178071A (en) * 1992-01-23 1993-01-12 American Roller Company Impression roller and method of preparation
DE4204871C2 (en) * 1992-02-18 1995-06-08 Eltex Elektrostatik Gmbh Impressionist
DE4408615C2 (en) * 1994-03-15 1996-01-11 Roland Man Druckmasch Cup roller within an application unit of a rotary printing press
DE4443368A1 (en) * 1994-12-06 1996-06-13 Pogatzki Volkmar W Dr Rotary intaglio printing press with voltage induced on pressure roller
US6314879B1 (en) * 1999-05-12 2001-11-13 Hurletron Incorporated Flexographic printing apparatus
US6644196B2 (en) * 2001-11-05 2003-11-11 Heidelberger Druckmaschinen Ag Electrorheological inker
DE102008006269B3 (en) 2008-01-25 2009-05-14 Eltex-Elektrostatik Gmbh Impression roller and its use

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2558900A (en) * 1945-03-26 1951-07-03 William C Huebner Electrostatic printing method and apparatus
US2547706A (en) * 1945-08-06 1951-04-03 Selective discharge control for inks
US3370546A (en) * 1964-06-05 1968-02-27 Agfa Ag Selective printing machine employing magnetic fields
GB1169566A (en) * 1966-11-24 1969-11-05 Crosfield Electronics Ltd Improvements relating to Printing Processes and Apparatus
US3661081A (en) * 1968-11-01 1972-05-09 Hurletron Controls Division Process of flexographic printing utilizing an electrical field
US4099462A (en) * 1973-06-25 1978-07-11 Hurletron Altair, Inc. Alternating current energized printing system utilizing a dielectric covered resilient impression roller
CH619400A5 (en) * 1977-03-25 1980-09-30 Franz Knopf
DE3302091A1 (en) * 1982-03-25 1983-10-13 Sulzer-Escher Wyss AG, 8023 Zürich PRINT ROLLER OF A ROTATION PRINTING MACHINE
JPS60500608A (en) * 1983-02-07 1985-05-02 グレイヴュア、アソウシエイシャン、アヴ、アメリカ、インコ−パレイテイド Improved method and apparatus for directly charging the surface of the impression cylinder of an electrostatically assisted gravure printing machine
DE3314454C2 (en) * 1983-04-21 1985-05-30 Albert-Frankenthal Ag, 6710 Frankenthal Impression of a rotogravure printing press

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1034078B2 (en) † 1997-11-27 2005-08-17 Spengler Electronic AG Electrostatic arrangement for rotogravure and flexographic printing

Also Published As

Publication number Publication date
DE3824714C1 (en) 1990-04-12
JP2526289B2 (en) 1996-08-21
EP0351504A2 (en) 1990-01-24
US5044275A (en) 1991-09-03
ATE77790T1 (en) 1992-07-15
DE58901766D1 (en) 1992-08-06
JPH02117832A (en) 1990-05-02
EP0351504A3 (en) 1990-03-21

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