[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

EP0428894B1 - Method of preparing a printing unit and printing unit adapted for this method - Google Patents

Method of preparing a printing unit and printing unit adapted for this method Download PDF

Info

Publication number
EP0428894B1
EP0428894B1 EP90120396A EP90120396A EP0428894B1 EP 0428894 B1 EP0428894 B1 EP 0428894B1 EP 90120396 A EP90120396 A EP 90120396A EP 90120396 A EP90120396 A EP 90120396A EP 0428894 B1 EP0428894 B1 EP 0428894B1
Authority
EP
European Patent Office
Prior art keywords
printing
screen
screen casing
process according
forme
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
EP90120396A
Other languages
German (de)
French (fr)
Other versions
EP0428894A3 (en
EP0428894A2 (en
Inventor
Thomas John
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.)
Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
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 MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0428894A2 publication Critical patent/EP0428894A2/en
Publication of EP0428894A3 publication Critical patent/EP0428894A3/en
Application granted granted Critical
Publication of EP0428894B1 publication Critical patent/EP0428894B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/26—Construction of inking rollers

Definitions

  • the invention relates to a method for preparing a printing unit for printing, which comprises at least one inking unit with an anilox roller interacting with a doctor blade, which can be coated with an interchangeable screen jacket provided with ink-guiding cups, which is driven by the forme cylinder speed and whose diameter in the operational state is equal to the diameter of the a printing forme plate and a printing unit suitable for carrying out the method.
  • an inking unit with an anilox roller is known, the cells of which are arranged in a compressible carrier layer, which can also be designed as an exchangeable plate.
  • a compressible carrier layer which can also be designed as an exchangeable plate.
  • EP 0 279 295 A2 shows a printing unit for offset or high-pressure machines, in which an application roller with a resilient surface is arranged between an anilox roller and the forme cylinder, the diameter of which is equal to the diameter of the forme cylinder covered with a printing forme and which is driven at the forme cylinder speed.
  • No. 4,672,893 deals with a mixed printing process, wherein an ink fountain cylinder is provided with an engraved image area and an anilox ink metering area.
  • a cylinder attached to the ink fountain cylinder is equipped with a blanket transfer area and a flexographic image area.
  • the images of the engraved image area and the flexo image area are printed in one or more stations in order to create an overall design on a flexible plastic.
  • the invention has for its object to provide a method and a device suitable for its implementation, with an exact dosage of the ink to be fed to the forme cylinder, both in the circumferential direction and in the longitudinal direction of the anilox roller with little wear on the parts is made possible.
  • the forme cylinder 2 interacts with an inking roller 4, which has a resilient ink-accepting surface.
  • the ink is applied to the inking roller 4 by an anilox roller 5.
  • a grid jacket 6, designed as a grid plate, is clamped onto the anilox roller 5.
  • the diameter of the screen roller 5 covered with the screen jacket 6 is equal to the diameter of the ready-to-use forme cylinder 2.
  • the forme cylinder 2 and the rollers 4, 5 are driven at the same speed.
  • the inking roller 4 also has the same diameter.
  • the plate forming the grid jacket 6 is made of a hard material with a flat surface into which wells are introduced.
  • a gravure winding plate as shown in detail in FIGS. 3 and 5, is used as the grid jacket 6.
  • a chamber doctor blade 7 is employed, with which ink is simultaneously fed to the anilox roller 5 and then its surface is doctored off becomes.
  • a dampening unit 8 of any type, indicated only schematically, is provided, with which dampening solution can be applied to the forme cylinder 2.
  • an impression cylinder 9 is provided with which a printing material web 10 is pressed onto the blanket cylinder 1.
  • the impression cylinder 9 can be the blanket cylinder of another printing unit.
  • Fig. 2 shows that the printing form 3 has a plurality of printing areas 11, 12, 13, between which non-printing areas remain. If the printing form according to FIG. 2 is to be used for printing, a grid jacket 6 according to FIG. 3 is produced, which is provided with ink-receiving areas 14, 15, 16, between which ink-repellent areas lie.
  • the printing form 3 and the screen jacket 6 are clamped onto the forme cylinder 2 or the screen roller 5.
  • the grid jacket 6 is clamped in such a way that the ink picked up by the area 14 is passed on via the inking roller 4 to the printing area 11 of the printing form 3.
  • the ink picked up by the areas 15, 16 is guided via the inking roller 4 to the areas 12, 13 of the printing form 3.
  • the ink-receiving areas of the grid jacket 6 are formed by cells 17 which are introduced into a photopolymer layer 18.
  • the photopolymer layer 18 is firmly connected to a carrier layer 19.
  • each ink-guiding cup of the screen jacket 20 guides an ink particle over the inking roller 4 to a point on the printing form 3 where this ink particle is required immediately.
  • a screen printing plate can be used as a grid jacket 21.
  • cups 22 are provided, which go through the entire thickness of the screen printing plate. The bottom of these cups 22 is formed by the surface of the anilox roller 5.
  • the application of the method according to the invention is not limited to offset printing units.
  • a forme cylinder 23 is provided which can be covered with hard high-pressure molds 24.
  • the ink is in turn fed to the forme cylinder 23 by means of an applicator roller 25 with a resilient, ink-accepting surface.
  • the application roller 25 is in contact with an anilox roller 26, on which a raster jacket 27 is applied, which is provided with cells only in the printing areas.
  • the grid jacket 27 is designed as an exchangeable sleeve.
  • a chambered doctor blade 28 is provided for ink supply. However, any other known doctor blade inking unit can also be used for the ink supply.
  • the forme cylinder 23, the anilox roller 26 and the applicator roller 25 have the same diameter and are driven at the same speed.
  • the grid jacket 27 is produced with a well configuration that is either tailored only in some areas or precisely to the color requirements of the high-pressure mold 24.
  • the printing form and screen jacket are then clamped onto the forme cylinder 23 or the screen roller 26.
  • the method according to the invention can also be used in flexographic printing units.
  • the printing form and the screen jacket are applied to the forme cylinder or the screen roller that is in direct contact with it.
  • the main advantage of the invention can be seen in the fact that any additional adjustment or control means can be used to adapt the ink conveyed by the anilox roller to the ink requirement of the forme cylinder, both in the circumferential and in the lateral direction. Since the cups of the grid jacket can be produced in different depths, this can be adapted to the color to be used in each case.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Printing Methods (AREA)

Description

Die Erfindung betrifft ein Verfahren zur Druckvorbereitung eines Druckwerks, das mindestens ein Farbwerk mit einer mit einer Rakel zusammenwirkenden Rasterwalze umfaßt, die mit einem mit farbführenden Näpfchen versehenen, auswechselbaren Rastermantel belegbar, die mit Formzylinderdrehzahl angetrieben und deren Durchmesser in betriebsbereitem Zustand gleich dem Durchmesser des mit einer Druckform belegten Formzylinders ist sowie ein zur Durchführung des Verfahrens geeignetes Druckwerk.The invention relates to a method for preparing a printing unit for printing, which comprises at least one inking unit with an anilox roller interacting with a doctor blade, which can be coated with an interchangeable screen jacket provided with ink-guiding cups, which is driven by the forme cylinder speed and whose diameter in the operational state is equal to the diameter of the a printing forme plate and a printing unit suitable for carrying out the method.

Aus der DE-OS 37 06 011 ist ein Farbwerk mit einer Rasterwalze bekannt, deren Näpfchen in einer kompressiblen Trägerschicht, die auch als auswechselbare Platte ausgebildet sein kann, angeordnet sind. Durch Änderung des Anpreßdrucks der Rakel wird das Volumen der Näpfchen und damit die Menge der dem Plattenzylinder zugeführten Farbe geändert. Eine Änderung der übertragenen Farbmenge zwischen bestimmten Bereichen der Rasterplatte ist jedoch nicht vorgesehen. Außerdem unterliegt die Anordnung wegen der Anstellung der Rakel an eine nachgiebige Schicht einem verhältnismäßig hohen Verschleiß.From DE-OS 37 06 011 an inking unit with an anilox roller is known, the cells of which are arranged in a compressible carrier layer, which can also be designed as an exchangeable plate. By changing the contact pressure of the doctor blade, the volume of the cells and thus the amount of the ink supplied to the plate cylinder are changed. However, there is no provision for changing the amount of color transferred between certain areas of the grid plate. In addition, the arrangement is subject to a relatively high level of wear due to the fact that the doctor blade is positioned against a resilient layer.

Die EP 0 279 295 A2 zeigt ein Druckwerk für Offset- oder Hochdruckmaschinen, bei dem zwischen einer Rasterwalze und dem Formzylinder eine Auftragswalze mit nachgiebiger Oberfläche angeordnet ist, deren Durchmesser gleich dem Durchmesser der mit einer Druckform belegten Formzylinders ist und die mit Formzylinderdrehzahl angetrieben ist.EP 0 279 295 A2 shows a printing unit for offset or high-pressure machines, in which an application roller with a resilient surface is arranged between an anilox roller and the forme cylinder, the diameter of which is equal to the diameter of the forme cylinder covered with a printing forme and which is driven at the forme cylinder speed.

Aus Polygraph, Bd. 26, Nr. 9, 05. Mai 1973, Frankfurt/Main DE, Seiten 632 bis 636, "Indirekter Tiefdruck als Ergänzung und Verbindung von Flexo- und Tiefdruck" ist entnehmbar, wie beim indirekten Tiefdruck, wie auch bei anderen Druckarten, mit einer das zu druckende Sujet wiedergebenden Form gearbeitet wird.From Polygraph, Vol. 26, No. 9, May 05, 1973, Frankfurt / Main DE, pages 632 to 636, "Indirect rotogravure as a supplement and combination of flexographic and rotogravure printing" can be seen, as with indirect rotogravure, as well as with other types of printing, with a form that reflects the subject to be printed.

Die US 4,672,893 behandelt einen gemischten Druckprozeß, wobei ein Farbkastenzylinder mit einem gravierten Bildbereich und einem Anilox-Farbdosierbereich versehen ist. Ein an den Farbkastenzylinder angestellter Zylinder ist mit einem Drucktuch-Übertragungsbereich und einem Flexo-Bildbereich ausgestattet. Die Bilder des gravierten Bildbereichs und des Flexo-Bildbereichs werden in einer oder mehreren Stationen aufgedruckt, um ein Gesamt-Design auf einem flexiblen Kunststoff zu kreieren.No. 4,672,893 deals with a mixed printing process, wherein an ink fountain cylinder is provided with an engraved image area and an anilox ink metering area. A cylinder attached to the ink fountain cylinder is equipped with a blanket transfer area and a flexographic image area. The images of the engraved image area and the flexo image area are printed in one or more stations in order to create an overall design on a flexible plastic.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren und eine zu seiner Durchführung geeignete Vorrichtung zu schaffen, mit dem eine exakte Dosierung der dem Formzylinder zuzuführenden Farbe, sowohl in Umfangsrichtung als auch in Längsrichtung der Rasterwalze bei geringem Verschleiß der Teile ermöglicht wird.The invention has for its object to provide a method and a device suitable for its implementation, with an exact dosage of the ink to be fed to the forme cylinder, both in the circumferential direction and in the longitudinal direction of the anilox roller with little wear on the parts is made possible.

Erfindungsgemäß wird diese Aufgabe durch die Anwendung der Merkmale des Anspruchs 1 gelöst.According to the invention, this object is achieved by applying the features of claim 1.

Ausführungsbeispiele der Erfindung sind anhand der Zeichnung beschrieben. In dieser zeigt:

  • Fig. 1 eine schematische Darstellung eines Offsetdruckwerkes und
  • Fig. 2 eine zum Druck verbreitete Offsetdruckform,
  • Fig. 3 eine erste Variante einer erfindungsgemäßen Rasterplatte,
  • Fig. 4 eine zweite Variante einer derartigen Platte,
  • Fig. 5 einen Ausschnitt aus einer Rasterplatte,
  • Fig. 6 einen Ausschnitt aus einer anderen Rasterplatte,
  • Fig. 7 eine schematische Darstellung eines Hochdruckfarbwerkes.
Embodiments of the invention are described with reference to the drawing. In this shows:
  • Fig. 1 is a schematic representation of an offset printing unit and
  • 2 an offset printing form widely used for printing,
  • 3 shows a first variant of a grid plate according to the invention,
  • 4 shows a second variant of such a plate,
  • 5 shows a section of a grid plate,
  • 6 shows a detail from another grid plate,
  • Fig. 7 is a schematic representation of a high-pressure inking unit.

Das zur Durchführung des erfindungsgemäßen Verfahrens geeignete Offsetdruckwerk nach Fig. 1 umfaßt einen Gummituchzylinder 1 und einen Formzylinder 2, auf den eine für den Offsetdruck geeignete Druckform 3 aufgespannt ist. Der Formzylinder 2 wirkt mit einer Farbauftragwalze 4 zusammen, die eine nachgiebige farbannehmende Oberfläche aufweist. Der Farbauftragwalze 4 wird die Farbe von einer Rasterwalze 5 zugeführt. Auf die Rasterwalze 5 ist ein als Rasterplatte ausgebildeter Rastermantel 6 aufgespannt. Der Durchmesser der mit dem Rastermantel 6 belegten Rasterwalze 5 ist gleich dem Durchmesser des betriebsbereiten Formzylinders 2. Der Formzylinder 2 und die Walzen 4, 5 werden mit gleicher Drehzahl angetrieben. Auch die Farbauftragwalze 4 weist den gleichen Durchmesser auf. Die den Rastermantel 6 bildende Platte besteht aus einem harten Material mit einer ebenen Oberfläche, in die Näpfchen eingebracht werden. Beim dargestellten Ausführungsbeispiel findet als Rastermantel 6 eine Tiefdruckwickelplatte Verwendung, wie sie im einzelnen in den Figuren 3 und 5 dargestellt ist. An die Rasterwalze 5 ist eine Kammerrakel 7 angestellt, mit der gleichzeitig Farbe zur Rasterwalze 5 geführt und anschließend deren Oberfläche abgerakelt wird. Weiterhin ist ein nur schematisch angedeutetes Feuchtwerk 8 beliebiger Bauart vorgesehen, mit dem Feuchtmittel auf den Formzylinder 2 aufgetragen werden kann. Letztlich ist ein Gegendruckzylinder 9 vorgesehen, mit dem eine Bedruckstoffbahn 10 an den Gummituchzylinder 1 angedrückt wird. Der Gegendruckzylinder 9 kann dabei der Gummituchzylinder eines weiteren Druckwerkes sein.1 comprises a blanket cylinder 1 and a forme cylinder 2, onto which a printing form 3 suitable for offset printing is clamped. The forme cylinder 2 interacts with an inking roller 4, which has a resilient ink-accepting surface. The ink is applied to the inking roller 4 by an anilox roller 5. A grid jacket 6, designed as a grid plate, is clamped onto the anilox roller 5. The diameter of the screen roller 5 covered with the screen jacket 6 is equal to the diameter of the ready-to-use forme cylinder 2. The forme cylinder 2 and the rollers 4, 5 are driven at the same speed. The inking roller 4 also has the same diameter. The plate forming the grid jacket 6 is made of a hard material with a flat surface into which wells are introduced. In the exemplary embodiment shown, a gravure winding plate, as shown in detail in FIGS. 3 and 5, is used as the grid jacket 6. On the anilox roller 5, a chamber doctor blade 7 is employed, with which ink is simultaneously fed to the anilox roller 5 and then its surface is doctored off becomes. Furthermore, a dampening unit 8 of any type, indicated only schematically, is provided, with which dampening solution can be applied to the forme cylinder 2. Ultimately, an impression cylinder 9 is provided with which a printing material web 10 is pressed onto the blanket cylinder 1. The impression cylinder 9 can be the blanket cylinder of another printing unit.

Fig. 2 läßt erkennen, daß die Druckform 3 mehrere druckende Bereiche 11, 12, 13 aufweist, zwischen denen nichtdruckende Bereiche verbleiben. Wenn mit der Druckform nach Fig. 2 gedruckt werden soll, wird ein Rastermantel 6 nach Fig. 3 hergestellt, der mit farbaufnehmenden Bereichen 14, 15, 16 versehen wird, zwischen denen farbabstoßende Bereiche liegen.Fig. 2 shows that the printing form 3 has a plurality of printing areas 11, 12, 13, between which non-printing areas remain. If the printing form according to FIG. 2 is to be used for printing, a grid jacket 6 according to FIG. 3 is produced, which is provided with ink-receiving areas 14, 15, 16, between which ink-repellent areas lie.

Anschließend werden die Druckform 3 und der Rastermantel 6 auf den Formzylinder 2 bzw. die Rasterwalze 5 aufgespannt. Die Aufspannung des Rastermantels 6 erfolgt dabei so, daß die vom Bereich 14 aufgenommene Farbe über die Farbauftragwalze 4 zum druckenden Bereich 11 der Druckform 3 weitergeleitet wird. In gleicher Weise wird die von den Bereichen 15, 16 aufgenommene Farbe über die Farbauftragwalze 4 zu den Bereichen 12, 13 der Druckform 3 geführt.Then the printing form 3 and the screen jacket 6 are clamped onto the forme cylinder 2 or the screen roller 5. The grid jacket 6 is clamped in such a way that the ink picked up by the area 14 is passed on via the inking roller 4 to the printing area 11 of the printing form 3. In the same way, the ink picked up by the areas 15, 16 is guided via the inking roller 4 to the areas 12, 13 of the printing form 3.

Die farbaufnehmenden Bereiche des Rastermantels 6 werden dabei, wie Fig. 5 zeigt, durch Näpfchen 17 gebildet, die in eine Photopolymerschicht 18 eingebracht werden. Die Photopolymerschicht 18 ist fest mit einer Trägerschicht 19 verbunden.As shown in FIG. 5, the ink-receiving areas of the grid jacket 6 are formed by cells 17 which are introduced into a photopolymer layer 18. The photopolymer layer 18 is firmly connected to a carrier layer 19.

Durch diese Maßnahmen wird erreicht, daß der Rastermantel 6 nur in den Bereichen Farbe aufnimmt und weiterleitet, in denen tatsächlich ein Farbbedarf der Druckplatte vorliegt.These measures ensure that the grid jacket 6 receives and transmits ink only in the areas where there is actually a color requirement of the printing plate.

Während bei dem Rastermantel 6 gemäß Fig. 3 in den Bereichen 14 bis 16 eine gleichmäßige Näpfchenverteilung vorgesehen ist, erfolgt bei dem Rastermantel 20 gemäß Fig. 4 eine noch exaktere Farbdosierung. Hierzu ist das zu druckende Sujet der Druckform 3 auf den Rastermantel 20 in allen Einzelheiten aufgebracht. Infolgedessen führt jedes farbführende Näpfchen des Rastermantels 20 ein Farbpartikel über die Farbauftragwalze 4 zu einer Stelle der Druckform 3, an der dieses Farbpartikel unmittelbar benötigt wird.While in the areas 14 to 16 a uniform cell distribution is provided in the grid jacket 6 according to FIG. 3, an even more precise color metering takes place in the grid jacket 20 according to FIG. 4. For this purpose, the subject of printing form 3 to be printed on the Grid jacket 20 applied in all details. As a result, each ink-guiding cup of the screen jacket 20 guides an ink particle over the inking roller 4 to a point on the printing form 3 where this ink particle is required immediately.

Anstelle einer Tiefdruckwickelplatte als Rastermantel kann auch, vgl. Fig. 6, eine Siebdruckplatte als Rastermantel 21 Verwendung finden. In dieser sind Näpfchen 22 vorgesehen, die durch die gesamte Dicke der Siebdruckplatte hindurchgehen. Der Boden dieser Näpfchen 22 wird durch die Oberfläche der Rasterwalze 5 gebildet.Instead of a gravure winding plate as a grid jacket, cf. 6, a screen printing plate can be used as a grid jacket 21. In this cups 22 are provided, which go through the entire thickness of the screen printing plate. The bottom of these cups 22 is formed by the surface of the anilox roller 5.

Wie Fig. 7 zeigt, ist die Anwendung des erfindungsgemäßen Verfahrens nicht auf Offsetdruckwerke beschränkt. Bei dem Druckwerk gemäß Fig. 7 ist ein Formzylinder 23 vorgesehen, der mit harten Hochdruckformen 24 belegbar ist. Dem Formzylinder 23 wird dabei die Farbe wiederum mittels einer Auftragwalze 25 mit einer nachgiebigen, farbannehmenden Oberfläche zugeführt. Die Auftragwalze 25 steht in Kontakt mit einer Rasterwalze 26, auf die ein Rastermantel 27 aufgebracht ist, der lediglich in den druckenden Bereichen mit Näpfchen versehen ist. Der Rastermantel 27 ist als auswechselbare Hülse ausgebildet. Zur Farbzufuhr ist eine Kammerrakel 28 vorgesehen. Zur Farbzufuhr ist aber auch jedes andere bekannte Rakelfarbwerk einsetzbar. In betriebsbereitem Zustand weisen der Formzylinder 23, die Rasterwalze 26 und die Auftragwalze 25 gleiche Durchmesser auf und werden mit gleicher Drehzahl angetrieben.As FIG. 7 shows, the application of the method according to the invention is not limited to offset printing units. In the printing unit according to FIG. 7, a forme cylinder 23 is provided which can be covered with hard high-pressure molds 24. The ink is in turn fed to the forme cylinder 23 by means of an applicator roller 25 with a resilient, ink-accepting surface. The application roller 25 is in contact with an anilox roller 26, on which a raster jacket 27 is applied, which is provided with cells only in the printing areas. The grid jacket 27 is designed as an exchangeable sleeve. A chambered doctor blade 28 is provided for ink supply. However, any other known doctor blade inking unit can also be used for the ink supply. When ready for operation, the forme cylinder 23, the anilox roller 26 and the applicator roller 25 have the same diameter and are driven at the same speed.

Auch bei dieser Ausführungsform wird der Rastermantel 27 mit einer Näpfchenkonfiguration hergestellt, die entweder nur bereichsweise oder genau auf den Farbbedarf der Hochdruckform 24 abgestellt ist. Anschließend werden Druckform und Rastermantel auf den Formzylinder 23 bzw. die Rasterwalze 26 aufgespannt.In this embodiment too, the grid jacket 27 is produced with a well configuration that is either tailored only in some areas or precisely to the color requirements of the high-pressure mold 24. The printing form and screen jacket are then clamped onto the forme cylinder 23 or the screen roller 26.

Das erfindungsgemäße Verfahren ist auch bei Flexodruckwerken anwendbar. Hier werden die Druckform und der Rastermantel auf den Formzylinder bzw. die damit unmittelbar in Kontakt stehende Rasterwalze aufgebracht.The method according to the invention can also be used in flexographic printing units. Here the printing form and the screen jacket are applied to the forme cylinder or the screen roller that is in direct contact with it.

Der wesentliche Vorteil der Erfindung ist darin zu sehen, daß ohne zusätzliche Stell- oder Steuermittel eine beliebig genaue Anpassung der von der Rasterwalze weitergeführten Farbe an den Farbbedarf des Formzylinders und zwar sowohl im Umfangs- als auch in Seitenrichtung erfolgen kann. Da die Näpfchen des Rastermantels in unterschiedlicher Tiefe hergestellt werden können, kann hierdurch eine Anpassung an die jeweils zu verwendende Farbe erfolgen.The main advantage of the invention can be seen in the fact that any additional adjustment or control means can be used to adapt the ink conveyed by the anilox roller to the ink requirement of the forme cylinder, both in the circumferential and in the lateral direction. Since the cups of the grid jacket can be produced in different depths, this can be adapted to the color to be used in each case.

Claims (9)

  1. Process for print preparation in a printing unit which includes at least one inking unit with a screen roller (5, 26) co-operating with a doctor blade (7, 28), wherein the screen roller can be covered with a removable screen casing (6, 20, 21, 27) provided with ink-carrying cells (17, 22) which is driven at the forme cylinder speed and whose diameter in the operational state is equal to the diameter of the forme cylinder (2, 23) covered with a printing forme (3), characterised in that to produce the screen casing (6, 20, 21, 27) it is provided with a cell configuration which in the circumferential and/or longitudinal direction is adapted in an arbitrarily accurate manner to the ink requirement of the corresponding areas (11, 12, 13) of the printing forme (3), and the screen casing (6, 20, 21, 27) with the associated printing forme (3) to which it is adapted are inserted into the printing unit.
  2. Process according to claim 1, characterised in that the screen casing (20) is provided with a configuration of cells reproducing the subject (11, 12, 13) to be printed.
  3. Process according to one of claims 1 or 2, characterised in that the screen casing (6, 20, 21) is made from a plate of a hard material.
  4. Process according to one of claims 1 and 2, characterised in that a sleeve (27) is used as the screen casing.
  5. Process according to claim 3, characterised in that the screen casing (6) is made from a wrap-around gravure plate.
  6. Process according to claim 3, characterised in that the screen casing (21) is made from a screen printing plate.
  7. Process according to claim 4, characterised in that the screen casing (27) is made from a gravure printing sleeve.
  8. Process according to claim 4, characterised in that the screen casing (27) is made from a screen printing sleeve.
  9. Printing unit for carrying out the process according to claim 1 for offset or letterpress printing machines in which between the screen roller (5, 26) and the forme cylinder (2, 23) there is arranged an inking roller (4, 25) with a flexible surface, the diameter of which is equal to the diameter of the forme cylinder (2, 23) covered with a printing forme (3) and which is driven at the forme cylinder speed, characterised in that the screen roller (5, 26) is provided with a screen casing (6, 20, 21, 27) which contains ink-receiving areas (14, 15, 16) between which lie ink-repellent areas, which correspond to the printing (11, 12, 13) and the non-printing areas of the printing forme (3, 24) respectively.
EP90120396A 1989-11-18 1990-10-24 Method of preparing a printing unit and printing unit adapted for this method Expired - Lifetime EP0428894B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3938448 1989-11-18
DE3938448 1989-11-18

Publications (3)

Publication Number Publication Date
EP0428894A2 EP0428894A2 (en) 1991-05-29
EP0428894A3 EP0428894A3 (en) 1991-11-06
EP0428894B1 true EP0428894B1 (en) 1995-06-28

Family

ID=6393837

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90120396A Expired - Lifetime EP0428894B1 (en) 1989-11-18 1990-10-24 Method of preparing a printing unit and printing unit adapted for this method

Country Status (4)

Country Link
US (1) US5134936A (en)
EP (1) EP0428894B1 (en)
JP (1) JPH03169555A (en)
DE (1) DE59009335D1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006031682A1 (en) * 2006-07-08 2008-01-10 Man Roland Druckmaschinen Ag Flexographic printing roller and flexographic printing process

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04371838A (en) * 1991-06-20 1992-12-24 Canon Inc Transfer printer and production of liquid crystal element
JP3116591B2 (en) * 1992-09-28 2000-12-11 ソニー株式会社 Printing equipment
DE9310713U1 (en) * 1993-07-17 1993-09-02 Man Roland Druckmaschinen Ag, 63069 Offenbach Inking roller
DE4430801C2 (en) * 1994-08-30 2003-04-17 Metronic Ag Printing device for printing plastic cards
IL116123A (en) 1995-11-23 1999-07-14 Scitex Corp Ltd System and method for printing
DE102006030290B3 (en) * 2006-03-03 2007-10-18 Koenig & Bauer Aktiengesellschaft printing unit
WO2007099148A2 (en) * 2006-03-03 2007-09-07 Koenig & Bauer Aktiengesellschaft Printing groups of a printing press
IT1402297B1 (en) * 2010-09-08 2013-08-28 Uteco Converting Spa CYLINDER STRUCTURE PARTICULARLY FINISHED FOR FLEXOGRAPHIC PRINTING MACHINES

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE485112A (en) * 1947-10-06
US3044396A (en) * 1959-01-02 1962-07-17 Carl Allers Ets Inking mechanism for intaglio printing machines
US3392667A (en) * 1965-06-07 1968-07-16 Interchem Corp Multicolor electrostatic printing
US3738266A (en) * 1967-07-25 1973-06-12 Matsushita Electric Ind Co Ltd Electronic printing device
US3814014A (en) * 1968-06-17 1974-06-04 H Dahlgren Inker
US3910186A (en) * 1973-10-15 1975-10-07 American Bank Note Co Ink supply apparatus for intaglio printing press
US4130056A (en) * 1977-08-01 1978-12-19 Addressograph-Multigraph Corporation Lithographic moisture system and method
EP0101266A3 (en) * 1982-08-09 1985-04-03 Milliken Research Corporation Printing method and apparatus
DE3412783C2 (en) * 1984-04-05 1986-09-25 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Printing unit of a web-fed rotary offset printing machine
US4672893A (en) * 1985-03-21 1987-06-16 Paramount Packaging Flexo-gravure printing
US4676157A (en) * 1985-05-28 1987-06-30 Komori Printing Wiping apparatus for intaglio printing machine
DE3705194A1 (en) * 1987-02-19 1988-09-01 Frankenthal Ag Albert INK
DE3706011A1 (en) * 1987-02-25 1988-09-08 Roland Man Druckmasch SHORT COLOR PLANT
US4901641A (en) * 1988-11-30 1990-02-20 Bobst Sa Printing press

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006031682A1 (en) * 2006-07-08 2008-01-10 Man Roland Druckmaschinen Ag Flexographic printing roller and flexographic printing process

Also Published As

Publication number Publication date
JPH03169555A (en) 1991-07-23
EP0428894A3 (en) 1991-11-06
DE59009335D1 (en) 1995-08-03
EP0428894A2 (en) 1991-05-29
US5134936A (en) 1992-08-04

Similar Documents

Publication Publication Date Title
EP0078444B1 (en) Inking arrangement for offset printing machines
DD209595A5 (en) MORE COLORS ROTARY PRINTING PRESS
DE3329331C2 (en) Printing unit with short inking unit
EP0771267B1 (en) Printing unit with short inking system in a rotary printing machine for direct printing using a "waterless" planographic printing plate
EP0428894B1 (en) Method of preparing a printing unit and printing unit adapted for this method
EP0518892B1 (en) Short inking apparatus for a rotary press
DE4401362C2 (en) Process and rotary printing machine for indirect gravure printing
DE19934395B4 (en) Inking unit in a rotary offset printing press with an inking roller to reduce the pearlescent effect of the ink
EP1056598B1 (en) Sheet-fed letterpress rotary with printing units for multicolour printing and at least one coating unit
DE2462017A1 (en) Rotogravure printing device
EP0453855A1 (en) Preparation of the inking unit of a printing machine when changing the printing order
EP0408972A2 (en) Offset-printing group
DE4401425C2 (en) Printing unit of an offset rotary printing machine
DE8224875U1 (en) Inking unit for offset printing machines
EP0640477A1 (en) Rotary printing machine for producing newspapers
DE4424913A1 (en) Ink transfer roller of a short inking unit for inking a waterless planographic printing plate
DE256705C (en)
DE2809689A1 (en) PRINTING UNIT WITH ONLY TWO PRINTING UNIT CYLINDERS
DE3821777C2 (en)
DE29510929U1 (en) Printing unit with short inking unit of a rotary printing machine for direct printing using a waterless planographic printing plate
DD238575A1 (en) painting equipment
DE3301699C2 (en) Rotogravure printing machine with at least one printing unit
DE19527889A1 (en) Inking device for inking water=free flat printing plate - has ink supply roll in form of screen roll with surface temp. above 30 deg C
DE2421209A1 (en) MULTI-COLOR ROTARY PRINTING MACHINE
DE102005028041B3 (en) High pressure printing machine with printing units whereby unused printing unit is equipped as imprint unit with counter pressure cylinder, plate cylinderm screen drum and chamber doctor blade

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): CH DE FR GB IT LI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): CH DE FR GB IT LI

17P Request for examination filed

Effective date: 19911018

17Q First examination report despatched

Effective date: 19931129

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

ITF It: translation for a ep patent filed
AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR GB IT LI

REF Corresponds to:

Ref document number: 59009335

Country of ref document: DE

Date of ref document: 19950803

ET Fr: translation filed
GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19951016

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19980914

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19980916

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19980922

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19980929

Year of fee payment: 9

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19991024

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19991031

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19991031

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19991024

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000801

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20051024