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EP0225509B1 - Device for printing a web - Google Patents

Device for printing a web Download PDF

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Publication number
EP0225509B1
EP0225509B1 EP86115898A EP86115898A EP0225509B1 EP 0225509 B1 EP0225509 B1 EP 0225509B1 EP 86115898 A EP86115898 A EP 86115898A EP 86115898 A EP86115898 A EP 86115898A EP 0225509 B1 EP0225509 B1 EP 0225509B1
Authority
EP
European Patent Office
Prior art keywords
cylinder
sleeve
cylinders
printing
blanket cylinder
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
EP86115898A
Other languages
German (de)
French (fr)
Other versions
EP0225509A2 (en
EP0225509A3 (en
EP0225509B2 (en
Inventor
Udo Tittgemeyer
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.)
TITTGEMEYER ENGINEERING GmbH
Original Assignee
TITTGEMEYER ENGINEERING 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
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Application filed by TITTGEMEYER ENGINEERING GmbH filed Critical TITTGEMEYER ENGINEERING GmbH
Priority to EP92121151A priority Critical patent/EP0549936B1/en
Priority to AT86115898T priority patent/ATE93772T1/en
Publication of EP0225509A2 publication Critical patent/EP0225509A2/en
Publication of EP0225509A3 publication Critical patent/EP0225509A3/en
Publication of EP0225509B1 publication Critical patent/EP0225509B1/en
Application granted granted Critical
Publication of EP0225509B2 publication Critical patent/EP0225509B2/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F17/00Printing apparatus or machines of special types or for particular purposes, not otherwise provided for
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41CPROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00Forme preparation
    • B41C1/10Forme preparation for lithographic printing; Master sheets for transferring a lithographic image to the forme
    • B41C1/1075Mechanical aspects of on-press plate preparation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F13/00Common details of rotary presses or machines
    • B41F13/08Cylinders
    • B41F13/20Supports for bearings or supports for forme, offset, or impression cylinders
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F27/00Devices for attaching printing elements or formes to supports
    • B41F27/10Devices for attaching printing elements or formes to supports for attaching non-deformable curved printing formes to forme cylinders
    • B41F27/105Devices for attaching printing elements or formes to supports for attaching non-deformable curved printing formes to forme cylinders for attaching cylindrical printing formes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41PINDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2213/00Arrangements for actuating or driving printing presses; Auxiliary devices or processes
    • B41P2213/80Means enabling or facilitating exchange of cylinders
    • B41P2213/804Means enabling or facilitating exchange of cylinders radially
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41PINDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2217/00Printing machines of special types or for particular purposes
    • B41P2217/10Printing machines of special types or for particular purposes characterised by their constructional features
    • B41P2217/15Machines with cylinders only supported on one side, e.g. cantilever construction
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41PINDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2227/00Mounting or handling printing plates; Forming printing surfaces in situ
    • B41P2227/20Means enabling or facilitating exchange of tubular printing or impression members, e.g. printing sleeves, blankets
    • B41P2227/21Means facilitating exchange of sleeves mounted on cylinders without removing the cylinder from the press

Definitions

  • the invention relates to a device for indirect printing of a web-shaped printing material, with at least three printing unit cylinders, each of which has its ends mounted in side walls during printing operation, using exchangeable sleeves.
  • a device of the generic type defined above is known from British Patent 763 639, which is particularly suitable for printing banknotes or securities and in which a plurality of colors are transferred to a common transfer cylinder and from this to a print carrier during a printing process should be.
  • This known machine obviously places very high demands on the print quality, especially on the page and on the circumferential register, which is why.
  • heavy and massive cylinders are used, which are precisely adjustable by means of complex and voluminous adjusting devices arranged on their end faces or on the printing unit side walls. All cylinders are equipped with interchangeable sleeves, whereby a sleeve change must only be carried out outside the machine if the cylinders are completely exposed, because the voluminous adjusting devices mentioned include the application of sleeves is not possible.
  • the present invention cannot be used, for example because of the side walls used there (which in this regard and in principle also applies to printing machines for direct printing processes, for example according to DE-OS 27 24 653) and since, in addition, due to the voluminous adjusting devices arranged on the end faces of the massive cylinders in the machine, a sleeve change on the cylinders is not possible, however, the invention can be used in printing presses with transfer or transfer cylinders working with indirect printing processes, even if two between two outer forme cylinders adjustable transfer cylinders are arranged so that a web-shaped printing material passed between them can be printed on both sides, an opening having to be provided for each transfer cylinder on one of the side walls, through which, independently of other cylinders, respectively s individually at the level of the transfer cylinder, a preferably rubber-coated forme cylinder sleeve can be pushed and pulled off the assigned transfer cylinder.
  • the construction of the medium-sized transfer cylinders in lightweight construction also results in a machine working in very high speed ranges, for example 80,000 to 100,000 revolutions per hour, and in addition the possibility of building the machines very broadly, since even with very wide machines due to the invention Formation of the middle transfer cylinder a one-sided fructle gene - that is to say, flying storage is possible.
  • This is not possible with the known, solidly designed transfer cylinders, since vibrations and shocks occur, particularly in the case of conventional transfer cylinders provided with rubber blankets with tensioning channels, which, owing to the relatively thick rubber blanket, have to be considerably wider than the tensioning channels of the plate cylinders so-called blanket-to-blanket printing machines, where two transfer or transfer cylinders are placed against each other.
  • the transfer cylinders according to British patent 763 639 are also massive and heavy. With the present invention it is thus possible to change the sleeve of the transfer cylinder, for example if the flexible layer is damaged or worn, for example a rubber layer, while maintaining the transfer cylinder in the machine quickly and individually. It is therefore not necessary to remove the outer forme cylinders and impression cylinders beforehand, and it is also not absolutely necessary to construct the outer forme cylinders in the same way as the transfer cylinders, which means that they can also be covered with conventional plates, if necessary already said, these only require a very narrow cylinder channel, compared to the channels required for transfer cylinders.
  • Another important advantage of the invention is that it is also possible to change the transfer sleeve of the transfer cylinder in a simple manner when the printing material is drawn in, ie when the web is drawn in.
  • the forme cylinders working together with the transfer cylinders according to the invention can be designed as planographic, gravure or high-pressure cylinders.
  • An offset printing press essentially consists of a frame, in the stands of which at least one printing unit with one or more printing units is arranged.
  • Each printing unit usually has a printing form cylinder, a transfer cylinder and an impression cylinder, which are rotatably mounted on pins.
  • a gear is connected to the pin, which transmits a rotary movement generated by a drive to the cylinders.
  • a pressure gap is provided between the transfer cylinder and the impression cylinder, through which the printing medium moves.
  • the print carrier comes into direct contact with both the transfer cylinder and the impression cylinder. Patterns are printed on the print carrier. These patterns are inked on the printing form by a color unit. Before the ink is applied, the printing form is moistened using the dampening unit.
  • the transfer cylinder with a resilient surface is rotatably mounted in the stands between the printing form cylinder and the impression cylinder.
  • the surface of this transfer cylinder is also an interchangeable sleeve with a resilient layer, such as rubber.
  • the ink that is transferred from the transfer cylinder to the print carrier designed as a web is transferred to this rubber.
  • the sleeve 1 shows a multi-metal sleeve 1 for the printing form in a spatial representation.
  • the sleeve 1 consists of a carrier metal sleeve 2, on which an intermediate metal 3 and a surface metal 4 are applied.
  • the carrier metal sleeve 2 is approximately 0.3 mm thick and, as the name suggests, has a carrier function.
  • the surface metal 4 is chrome in a thickness of about 1 to 2 u. The copper carries the color, the chrome the water, when the sleeve is prepared for the printing process as shown in FIG. 2.
  • the multi-metal sleeve 1 is mounted on the printing form cylinder 5.
  • the patterns 8 are applied to the surface 9 of the sleeve 1 facing away from the cylinder 5. As shown in FIG. 3, the sleeve 1 adheres firmly to the surface 6 with its inner surface 10 facing the surface 6, so that it cannot shift relative to the surface 6 during printing.
  • the carrier metal 2 facing the cylinder 5 is provided, which is coated with the intermediate metal 3 on its outer surface facing away from the cylinder 5.
  • a very thin layer of the surface metal 4 is applied to this intermediate metal 3, into which the pattern 8 (FIG. 4) is incorporated.
  • Nickel or steel, for example, come into consideration as carrier metal 2.
  • Copper is chosen as the intermediate metal 3, onto which chromium is applied as the surface metal 4.
  • Such multi-metal forms are well suited for carrying out the offset printing process.
  • the sleeve 1 can be attached to the surface 6 of the cylinder 5 in various ways. For example, it is possible to uniformly heat the sleeve 1. It expands so that it can be pushed onto the surface 6 of the cylinder 5. During the subsequent cooling of the sleeve 1, it contracts again and thereby lies firmly on the surface 6, so that it adheres non-positively to it.
  • shrinking of the sleeve 1 is advantageous because the patterns 8 are applied via a sensitizing varnish which is baked on the surface 9 of the sleeve 1 at a temperature of approximately 200 ° C. During this stoving of the sensitizing lacquer, the sleeve 1 heats up to a temperature suitable for shrinking on.
  • FIG. 5 shows a transfer sleeve 1a coated with a rubber covering 11 in cross section.
  • a carrier metal sleeve 2 is also used here.
  • the carrier metal sleeve 2 is an approximately 0.3 mm thick metal tube.
  • the rubber covering 11 is about 1 to 5 mm thick.
  • the cylinder 5 or the cylinder jacket 2o can be completely removed from the stand 12, 13.
  • the cylinder 5 or cylinder jacket 20 remains within the stand 12, 13.
  • the sleeve 1 is replaced on a cylinder 5, which is not removed from the stands 12, 13.
  • the cylinder can be mounted in a floating manner at one end 30 in the stator 12 and can be guided in a pivotable bearing 32 at its other end 31.
  • This pivotable bearing 32 is pivotably mounted on the stand 13 about a pivot bearing 33 and can be pivoted away from the stand 13 in a direction facing away from the cylinder 5.
  • the pivotable bearing 32 extends through the stand 13 a recess 34, the cross section of which is larger than the cross section of the sleeve 1.
  • the sleeve 1 can be removed from the cylinder 5 and replaced by another.
  • the pivotable bearing 32 is pivoted back in the direction of the cylinder 5, so that the end 31 of the cylinder 5 is guided within the pivotable bearing 32.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Rotary Presses (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Liquid Developers In Electrophotography (AREA)
  • Color Electrophotography (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Handling Of Continuous Sheets Of Paper (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Pens And Brushes (AREA)
  • Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
  • Ink Jet (AREA)

Abstract

A method is proposed for the printing of print carriers with a print forme in the shape of a sleeve. The sleeve is attached in an exchangeable manner to a body capable of rotation, to at least one end of which free access can be gained for the exchange operation. <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zum indirekten Bedrucken eines bahnförmigen Bedruckstoffes, mit mindestens drei jeweils mit ihren Enden während des Druckbetriebes in Seitenwänden gelagerten Druckwerkszylindern unter Verwendung von auswechswelbaren Hülsen.The invention relates to a device for indirect printing of a web-shaped printing material, with at least three printing unit cylinders, each of which has its ends mounted in side walls during printing operation, using exchangeable sleeves.

Im Prinzip ist aus der britischen Patent schrift 763 639 eine Vorrichtung der vorangehend definierten gattungsgemäßen Art bekannt, die sich insbesondere zum Drucken von Geldscheinen oder Wertpapieren eignet und bei der während eines Druckvorganges eine Mehrzahl von Farben auf einen gemeinsamen Übertragungszylinder und von diesem auf einen Druckträger übertragen werden sollen. Dabei werden bei dieser bekannten Maschine offensichtlich sehr hohe Anforderungen an die Druckqualität, insbesondere an das Seiten- und an das Umfangsregister gestellt, weshalb u.a. schwere und massive Zylinder verwendet werden, die durch an ihren Stirnseiten bzw. an den Druckwerkseitenwänden angeordneten aufwendigen und voluminösen Stellvorrichtungen exakt einstellbar sind. Sämtliche Zylinder sind mit auswechselbaren Hülsen ausgestattet, wobei ein Hülsenwechsel ausschließlich bei völlig freigelegten Zylindern außerhalb der Maschine vorgenommen werden muß, denn über die erwähnten voluminösen Stellvorrichtungen ist u.a. das Aufbringen von Hülsen nicht möglich. Bedingt durch den Aufbau der Seitenwände dieser bekannten Mehrfarbendruckmaschine müssen des weiteren die oberhalb eines horizontal verlaufenden bahnförmigen Bedruckstoffes angeordneten Zylinder nach oben und die unter der Bedruckstoffbahn liegenden Zylinder nach unten ausgebaut werden, was u.a. sehr zeitaufwendig ist, und was insbesondere den Nachteil mit sich bringt, daß auch ein Hülsenwechsel an den innenliegenden, d.h. zwischen den äußeren Druckwerkzylindern angeordneten Transferzylindern ebenfalls nur im ausgebauten Zustand möglich ist und zwar nur, wenn zuvor die äußeren Formzylinder allesamt aus der Maschine ausgebaut wurden, da eine Herausnahme der inneren Übertragungszylinder ansonsten nicht möglich ist. Es ist auch bereits bekannt, Druckzylinder - exakter gesagt Formzylinder - innerhalb einer Maschine mit das Druckbild tragenden Hülsen zu versehen, wie beispielsweise die deutsche Offenlegungsschrift 27 24 653 zeigt. Wie bei der Vorrichtung gemäß dem britischen Patent 763 639 wird auch bei der Vorrichtung gemäß der DE-OS 27 24 653 eine relativ kurze Seitenwand verwendet, auf der sich ein für den Hülsenwechsel abnehmbares Zylinderlagergehäuse aufsetzen kann, so daß es mit der Seitenwand verschraubbar ist. Bei derartigen Vorrichtungen, wo lediglich Formzylinder mit auswechselbaren Hülsen versehen werden, treten jedoch die im Zusammenhang mit der Abhandlung des britischen Patents 763 639 beschriebenen Probleme grundsätzlich nicht auf, da diese Formzylinder - unabhängig von dem verwendeten Druckverfahren - stets frei zugänglich sind.In principle, a device of the generic type defined above is known from British Patent 763 639, which is particularly suitable for printing banknotes or securities and in which a plurality of colors are transferred to a common transfer cylinder and from this to a print carrier during a printing process should be. This known machine obviously places very high demands on the print quality, especially on the page and on the circumferential register, which is why. heavy and massive cylinders are used, which are precisely adjustable by means of complex and voluminous adjusting devices arranged on their end faces or on the printing unit side walls. All cylinders are equipped with interchangeable sleeves, whereby a sleeve change must only be carried out outside the machine if the cylinders are completely exposed, because the voluminous adjusting devices mentioned include the application of sleeves is not possible. Due to the structure of the side walls of this known multi-color printing machine, the cylinders arranged above a horizontally running web-shaped printing material must also be removed upwards and the cylinders lying under the printing material web downwards, which among other things. is very time-consuming, and which has the particular disadvantage that a sleeve change on the inner, i.e. between the outer printing unit cylinders arranged transfer cylinders is also only possible in the disassembled state and only if the outer forme cylinders have all been removed from the machine beforehand, since otherwise it is not possible to remove the inner transfer cylinders. It is also already known to provide printing cylinders - more precisely, forme cylinders - within a machine with sleeves carrying the printed image, as is shown, for example, by German Offenlegungsschrift 27 24 653. As with the device according to British Patent 763 639, a relatively short side wall is also used in the device according to DE-OS 27 24 653, on which a cylinder bearing housing which can be removed for changing the sleeve can be placed, so that it can be screwed to the side wall. In such devices, where only forme cylinders are provided with exchangeable sleeves, the problems described in connection with the treatment of British patent 763 639 do not occur in principle, since these forme cylinders - regardless of the printing method used - are always freely accessible.

Ausgehend von einer Vorrichtung für das indirekte Druckverfahren bei der zwischen einem Formzylinder und einem Gegendruckzylinder ein mit einer Hülse versehener Übertragungszylinder angeordnet ist, wobei der Gegendruckzylinder ebenfalls ein gleichartig aufgebauter Übertragungszylinder sein kann, ist es Aufgabe der Erfindung diese Vorrichtung so weiterzubilden, daß die Druckmaschine für Drucke großer Breiten ausgelegt werden kann, wobei die Maschine mit sehr hoher Arbeitsgeschwindigkeit betreibbar sein soll und wobei ein schneller und individueller Wechsel von Hülsen an Übertragungszylindern möglich sein soll.Starting from a device for the indirect printing process in which a transfer cylinder provided with a sleeve is arranged between a forme cylinder and an impression cylinder, the impression cylinder also being able to be of a similar design, it is the object of the invention to develop this device in such a way that the printing press for Large width prints can be designed, the machine should be able to be operated at a very high working speed and a quick and individual change of sleeves on transfer cylinders should be possible.

Diese Aufgabe wird durch die Anwendung aller Merkmale des Ansprüchs 1 gelöst.This object is achieved by using all the features of claim 1.

Die wesentlichsten Vorteile ergeben sich dadurch, daß in neuartiger Weise ein Übertragungszylinder in Leichtbauweise konzipiert ist und durch die Seitenwand auf diesen eine Übertragungszylinderhülse schiebbar ist.The most important advantages result from the fact that a transfer cylinder is designed in a novel manner and a transfer cylinder sleeve can be pushed onto the side wall.

Bei bekannten Mehrfarbenmaschinen etwa gemäß dem britischen Patent 763 639 kann zwar die vorliegende Erfindung nicht eingesetzt werden, z.B. auf Grund der dort verwendeten Seitenwände (was diesbezüglich und grundsätzlich auch für Druckmaschinen für direkte Druckverfahren, etwa gemäß der DE-OS 27 24 653 gilt) und da außerdem durch die an den Stirnseiten der massiven Zylinder angeordneten voluminösen Stellvorrichtungen in der Maschine ein Hülsenwechsel an den Zylindern nicht möglich ist, jedoch ist die Erfindung bei mit indirekten Druckverfahren arbeitenden Druckmaschinen mit Übertragungs- bzw Transferzylindern einsetzbar, auch wenn zwischen zwei äußeren Formzylindern zwei aneinander anstellbare Transferzylinder angeordnet sind, so daß ein zwischen diesen hindurchgeführter bahnförmiger Bedruckstoff beidseitig bedruckbar ist, wobei für jeden Transferzylinder an einer der Seitenwände eine Öffnung vorgesehen werden muß, durch die unabhängig von anderen Zylindern jeweils individuell auf der Höhe der Transferzylinder eine vorzugsweise gummibeschichtete Formzylinderhülse hindurch und auf den zugeordneten Transferzylinder aufschiebbar und abziehbar ist. Durch die Konstruktion der mittleren Transferzylinder in Leichtbauweise ergibt sich zudem eine in sehr hohen Geschwindigkeitsbereichen, arbeitende Maschine, beispielsweise 80.000 bis 100.000 Umdrehungen pro Stunde, und zusätzlich die Möglichkeit, die Maschinen sehr breit zu bauen, da auch bei sehr breiten Maschinen bedingt durch die erfindungsgemäße Ausbildung der mittleren Transferzylinder ein einseitiges Freilegen - also quasi eine fliegende Lagerung möglich ist. Mit den bekannten, massiv ausgebildeten Transferzylindern ist dies nicht möglich, da besonders bei herkömmlichen mit Gummitüchern versehenen Transferzylindern mit Spannkanälen, die bedingt durch das relativ dicke Gummituch im Vergleich zu den Spannkanälen der Plattenzylinder wesentlich breiter sein müssen, Schwingungen und Stöße entstehen, besonders bei den sogenannten Blanket-to-Blanket-Druckmaschinen, wo zwei Transfer- bzw. Übertragungszylinder gegeneinander angestellt werden. Diese müssen besonders massiv gebaut werden, um Druckstreifen auf dem bahnförmigen Bedruckstoff zu vermeiden. Auch die Transferzylinder gemäß dem britischen Patent 763 639 sind massiv und schwer. Mit der vorliegenden Erfindung ist es somit möglich, die Hülsen der Übertragungszylinder, beispielsweise bei einer Beschädigung oder Abnützung der flexiblen Schicht, beispielsweise einer Gummischicht, unter Beibehaltung des Transferzylinders in der Maschine die Hülse schnell und individuell zu wechseln. Es ist somit nicht erforderlich, die äußeren Formzylinder und Gegendruckzylinder vorher auszubauen, und außerdem ist es auch nicht Zwingend erfoderlich, die äußeren Formyzylinder in der gleichen Weise aufzubauen wie die Übertragungszylinder, d.h. diese können ggf. auch mit herkömmlichen Platten bespannt werden, da, wie bereits gesagt, diese lediglich einen sehr schmalen Zylinderkanal benötigen, verglichen mit den bei Transferzylindern erforderlichen Kanälen. Ein weiterer wesentlicher Vorteil der Erfindung besteht darin, daß auch ein Wechsel der Übertragungshülse der Übertragungszylinder bei eingezogenem Bedruckstoff, d.h. bei eingezogener Bahn in einfacher Weise möglich ist. Die mit den erfindungsgemäßen Transferzylindern zusammenarbeitenden Formzylinder können als Flachdruck-, Tiefdruck- oder als Hochdruckzylinder ausgebildet sein.In known multi-color machines, for example in accordance with British Patent 763,639, the present invention cannot be used, for example because of the side walls used there (which in this regard and in principle also applies to printing machines for direct printing processes, for example according to DE-OS 27 24 653) and since, in addition, due to the voluminous adjusting devices arranged on the end faces of the massive cylinders in the machine, a sleeve change on the cylinders is not possible, however, the invention can be used in printing presses with transfer or transfer cylinders working with indirect printing processes, even if two between two outer forme cylinders adjustable transfer cylinders are arranged so that a web-shaped printing material passed between them can be printed on both sides, an opening having to be provided for each transfer cylinder on one of the side walls, through which, independently of other cylinders, respectively s individually at the level of the transfer cylinder, a preferably rubber-coated forme cylinder sleeve can be pushed and pulled off the assigned transfer cylinder. The construction of the medium-sized transfer cylinders in lightweight construction also results in a machine working in very high speed ranges, for example 80,000 to 100,000 revolutions per hour, and in addition the possibility of building the machines very broadly, since even with very wide machines due to the invention Formation of the middle transfer cylinder a one-sided freile gene - that is to say, flying storage is possible. This is not possible with the known, solidly designed transfer cylinders, since vibrations and shocks occur, particularly in the case of conventional transfer cylinders provided with rubber blankets with tensioning channels, which, owing to the relatively thick rubber blanket, have to be considerably wider than the tensioning channels of the plate cylinders so-called blanket-to-blanket printing machines, where two transfer or transfer cylinders are placed against each other. These have to be built particularly solid in order to avoid printing strips on the web-shaped printing material. The transfer cylinders according to British patent 763 639 are also massive and heavy. With the present invention it is thus possible to change the sleeve of the transfer cylinder, for example if the flexible layer is damaged or worn, for example a rubber layer, while maintaining the transfer cylinder in the machine quickly and individually. It is therefore not necessary to remove the outer forme cylinders and impression cylinders beforehand, and it is also not absolutely necessary to construct the outer forme cylinders in the same way as the transfer cylinders, which means that they can also be covered with conventional plates, if necessary already said, these only require a very narrow cylinder channel, compared to the channels required for transfer cylinders. Another important advantage of the invention is that it is also possible to change the transfer sleeve of the transfer cylinder in a simple manner when the printing material is drawn in, ie when the web is drawn in. The forme cylinders working together with the transfer cylinders according to the invention can be designed as planographic, gravure or high-pressure cylinders.

Weitere Einzelheiten der Erfindung ergeben sich aus der nachfolgenden ausführlichen Beschreibung und den beigefügten Zeichnungen, in denen bevorzugte Ausführungsformen der Erfindung beispielsweise veranschaulicht sind.Further details of the invention will become apparent from the following detailed description and the accompanying drawings, in which preferred embodiments of the invention are illustrated, for example.

In den Zeichnungen zeigen

  • Fig. 1 eine räumliche Darstellung einer Mehrmetallhülse,
  • Fig. 2 eine räumliche Darstellung einer auf einen Zylinder aufgezogenen Hülse,
  • Fig. 3 eine vergrößerte Ausschnittdarstellung der Rohform einer Mehrmetallhülse,
  • Fig. 4 eine vergrößerte Ausschnittdarstellung einer Druckform einer Mehrmetallhülse,
  • Fig. 5 einen Querschnitt durch eine mit einem Gummibelag beschichtete Übertragungshülse,
  • Fig. 6 eine schematische Darstellung eines Teils einer Druckmaschine mit einem einseitig vom Zylinder abgeklappten Lager.
Show in the drawings
  • 1 is a spatial representation of a multi-metal sleeve,
  • 2 is a spatial representation of a sleeve mounted on a cylinder,
  • 3 is an enlarged detail view of the raw shape of a multi-metal sleeve,
  • 4 is an enlarged detail view of a printing form of a multi-metal sleeve,
  • 5 shows a cross section through a transmission sleeve coated with a rubber covering,
  • Fig. 6 is a schematic representation of part of a printing press with a bearing folded away from the cylinder on one side.

Eine Offset-Druckmaschine besteht im wesentlichen aus einem Gerüst, in dessen Ständern mindestens ein Druckwerk mit einer oder mehreren Druckeinheiten angeordnet ist. Jede Druckeinheit hat in der Regel einen Druckformzylinder, einen Übertragungszylinder und einen Gegendruckzylinder, die drehbar auf Zapfen gelagert sind. An den Zapfen ist ein Getriebe angeschlossen, das eine von einem Antrieb erzeugte Drehbewegung auf die Zylinder überträgt. Zwischen dem Übertragungszylinder und dem Gegendruckzylinder ist ein Druckspalt vorgesehen, durch den sich der Druckträger hindurchbewegt. Bei seiner Bewegung kommt der Druckträger in unmittelbaren Kontakt sowohl mit dem Übertragungszylinder als auch mit dem Gegendruckzylinder. Dabei drucken sich Muster auf dem Druckträger ab. Diese Muster werden auf der Druckform über ein Farbwerk von einer Farbe eingefärbt. Vor der Farbauftragung wird die Druckform über das Feuchtwerk befeuchtet.An offset printing press essentially consists of a frame, in the stands of which at least one printing unit with one or more printing units is arranged. Each printing unit usually has a printing form cylinder, a transfer cylinder and an impression cylinder, which are rotatably mounted on pins. A gear is connected to the pin, which transmits a rotary movement generated by a drive to the cylinders. A pressure gap is provided between the transfer cylinder and the impression cylinder, through which the printing medium moves. As it moves, the print carrier comes into direct contact with both the transfer cylinder and the impression cylinder. Patterns are printed on the print carrier. These patterns are inked on the printing form by a color unit. Before the ink is applied, the printing form is moistened using the dampening unit.

Bei diesem indirekten Druckverfahren ist zwischen dem Druckformzylinder und dem Gegendruckzylinder der Übertragungszylinder mit nachgiebiger Oberfläche in den Ständern drehbar gelagert. Die Oberfläche dieses Übertragungszylinders ist ebenfalls eine auswechselbare Hülse mit einer nachgiebigen Schicht, beispielsweise Gummi. Auf dieses Gummi wird die Farbe übertragen, die von dem Übertragungszylinder an den als Bahn ausgebildeten Druckträger abgegeben wird.In this indirect printing process, the transfer cylinder with a resilient surface is rotatably mounted in the stands between the printing form cylinder and the impression cylinder. The surface of this transfer cylinder is also an interchangeable sleeve with a resilient layer, such as rubber. The ink that is transferred from the transfer cylinder to the print carrier designed as a web is transferred to this rubber.

In der Fig. 1 ist in räumlicher Darstellung eine Mehrmetallhülse 1 für die Druckform gezeigt. Die Hülse 1 besteht aus einer Trägermetallhülse 2, auf die ein Zwischenmetall 3 und ein Oberflächenmetall 4 aufgebracht sind. Die Trägermetallhülse 2 ist etwa o,3 mm stark und hat, wie der Name besagt, eine Trägerfunktion. Als Zwischenmetall 3 wird eine Kupferschicht von bei Offsetdruckformen üblicher Stärke von ca. 2 bis 6 u vorgesehen. Das Oberflächenmetall 4 ist Chrom in einer Stärke von ca. 1 bis 2 u. Das Kupfer führt die Farbe, das Chrom das Wasser, wenn die Hülse für den Druckvorgang wie in Fig. 2 gezeigt vorbereitet ist.1 shows a multi-metal sleeve 1 for the printing form in a spatial representation. The sleeve 1 consists of a carrier metal sleeve 2, on which an intermediate metal 3 and a surface metal 4 are applied. The carrier metal sleeve 2 is approximately 0.3 mm thick and, as the name suggests, has a carrier function. As the intermediate metal 3, a copper layer of approximately 2 to 6 μm thick, which is customary in offset printing forms, is provided. The surface metal 4 is chrome in a thickness of about 1 to 2 u. The copper carries the color, the chrome the water, when the sleeve is prepared for the printing process as shown in FIG. 2.

In der Fig. 2 ist die Mehrmetallhülse 1 auf den Druckformzylinder 5 aufgezogen. Auf der Oberfläche 6 des Zylinders 3 haftet kraftschlüssig die Hülse 1, die eine sehr geringe Wandstärke 7 besitzt. Die Muster 8 sind auf der dem Zylinder 5 abgewandten Oberfläche 9 der Hülse 1 aufgetragen. Wie die Fig. 3 zeigt, haftet die Hülse 1 mit ihrer der Oberfläche 6 zugewandten inneren Oberfläche 1o kraftschlüssig fest auf der Oberfläche 6, so daß sie sich beim Drucken gegenüber der Oberfläche 6 nicht verschieben kann.2, the multi-metal sleeve 1 is mounted on the printing form cylinder 5. The sleeve 1, which has a very small wall thickness 7, adheres non-positively to the surface 6 of the cylinder 3. The patterns 8 are applied to the surface 9 of the sleeve 1 facing away from the cylinder 5. As shown in FIG. 3, the sleeve 1 adheres firmly to the surface 6 with its inner surface 10 facing the surface 6, so that it cannot shift relative to the surface 6 during printing.

Bei der in einer Mehrmetallform ausgebildeten Hülse 1 ist das dem Zylinder 5 zugewandte Trägermetall 2 vorgesehen, das auf seiner dem Zylinder 5 abgewandten äußeren Oberfläche mit dem Zwischenmetall 3 beschichtet ist. Auf dieses Zwischenmetall 3 wird eine sehr dünne Schicht des Oberflächenmetalls 4 aufgetragen, in welches das Muster 8 (Fig.4) eingearbeitet wird. Als Trägermetall 2 kommen beispielsweise Nickel oder Stahl in Betracht. Als Zwischenmetall 3 wird Kupfer gewählt, auf das Chrom als Oberflächenmetall 4 aufgetragen wird. Derartige Mehrmetallformen sind zur Durchführung des Offset-Druckverfahrens gut geeignet.In the case of the sleeve 1 formed in a multi-metal form, the carrier metal 2 facing the cylinder 5 is provided, which is coated with the intermediate metal 3 on its outer surface facing away from the cylinder 5. A very thin layer of the surface metal 4 is applied to this intermediate metal 3, into which the pattern 8 (FIG. 4) is incorporated. Nickel or steel, for example, come into consideration as carrier metal 2. Copper is chosen as the intermediate metal 3, onto which chromium is applied as the surface metal 4. Such multi-metal forms are well suited for carrying out the offset printing process.

Die Hülse 1 kann auf verschiedene Weise auf der Oberfläche 6 des Zylinders 5 befestigt werden. Es ist beispielsweise möglich, die Hülse 1 gleichmäßig zu erwärmen. Dabei dehnt sie sicht, so daß sie auf die Oberfläche 6 des Zylinders 5 aufgeschoben werden kann. Bei der anschließenden Abkühlung der Hülse 1 zieht sie sich wieder zusammen und legt sich dabei fest auf die Oberfläche 6 auf, so daß sie auf dieser kraftschlüssig haftet. Eine derartige Aufschrumpfung der Hülse 1 ist deshalb günstig, weil die Muster 8 über einen Sensibilisierungslack aufgebracht werden, der bei einer Temperatur von etwa 2oo° C auf der Oberfläche 9 der Hülse 1 eingebrannt wird. Bei diesem Einbrennen des Sensibilisierungslackes erwärmt sich die Hülse 1 auf eine zum Aufschrumpfen geeignete Temperatur.The sleeve 1 can be attached to the surface 6 of the cylinder 5 in various ways. For example, it is possible to uniformly heat the sleeve 1. It expands so that it can be pushed onto the surface 6 of the cylinder 5. During the subsequent cooling of the sleeve 1, it contracts again and thereby lies firmly on the surface 6, so that it adheres non-positively to it. Such shrinking of the sleeve 1 is advantageous because the patterns 8 are applied via a sensitizing varnish which is baked on the surface 9 of the sleeve 1 at a temperature of approximately 200 ° C. During this stoving of the sensitizing lacquer, the sleeve 1 heats up to a temperature suitable for shrinking on.

In der Fig. 5 ist eine mit einem Gummibelag 11 beschichtete Übertragungshülse 1a im Querschnitt gezeigt. Auch hier wird eine Trägermetallhülse 2 verwendet. Die Trägermetallhülse 2 ist ein etwa o,3 mm starkes Metallrohr. Der Gummibelag 11 ist etwa 1 bis 5 mm stark.5 shows a transfer sleeve 1a coated with a rubber covering 11 in cross section. A carrier metal sleeve 2 is also used here. The carrier metal sleeve 2 is an approximately 0.3 mm thick metal tube. The rubber covering 11 is about 1 to 5 mm thick.

Zum Auswechseln der Hülse 1 kann der Zylinder 5 bzw. der Zylindermantel 2o vollkommen aus dem Ständer 12, 13 herausgenommen werden. Bevorzugt verbleibt der Zylinder 5 bzw. Zylindermantel 2o jedoch innerhalb des Ständers 12, 13.To replace the sleeve 1, the cylinder 5 or the cylinder jacket 2o can be completely removed from the stand 12, 13. Preferably, however, the cylinder 5 or cylinder jacket 20 remains within the stand 12, 13.

In der in Fig. 6 dargestellten Ausführungsform wird die Hülse 1 auf einem Zylinder 5 ausgewechselt, der den Ständern 12, 13 nicht entnommen wird. Zu diesem Zweck kann beispielsweise der Zylinder an seinem einen Ende 3o im Ständer 12 fliegend gelagert und an seinem anderen Ende 31 in einem verschwenkbaren Lager 32 geführt sein. Dieses verschwenkbare Lager 32 ist um ein Schwenklager 33 am Ständer 13 verschwenkbar gelagert und kann in eine vom Zylinder 5 abgewandte Richtung vom Ständer 13 weggeschwenkt werden. Nach dem Abschwenken des verschwenkbaren Lagers 32 erstreckt sich durch den Ständer 13 eine Ausnehmung 34, deren Querschnitt größer ist als der Querschnitt der Hülse 1. Durch diese Ausnehmung 34 kann die Hülse 1 vom Zylinder 5 abgezogen und durch eine andere ersetzt werden. Nach dem Auswechseln der Hülse 1 wird das verschwenkbare Lager 32 in Richtung auf den Zylinder 5 zurückgeschwenkt, so daß das Ende 31 des Zylinders 5 innerhalb des verschwenkbaren Lagers 32 geführt wird.In the embodiment shown in FIG. 6, the sleeve 1 is replaced on a cylinder 5, which is not removed from the stands 12, 13. For this purpose, for example, the cylinder can be mounted in a floating manner at one end 30 in the stator 12 and can be guided in a pivotable bearing 32 at its other end 31. This pivotable bearing 32 is pivotably mounted on the stand 13 about a pivot bearing 33 and can be pivoted away from the stand 13 in a direction facing away from the cylinder 5. After pivoting the pivotable bearing 32 extends through the stand 13 a recess 34, the cross section of which is larger than the cross section of the sleeve 1. Through this recess 34, the sleeve 1 can be removed from the cylinder 5 and replaced by another. After the sleeve 1 has been replaced, the pivotable bearing 32 is pivoted back in the direction of the cylinder 5, so that the end 31 of the cylinder 5 is guided within the pivotable bearing 32.

Der Austauschvorgang der Hülsen 1 ist in der Fig. 6 anhand der Druckformhülse 1 behandelt worden. Für die Übertragungshülse 1 a mit der Gummischicht 11 gelten jedoch die gleichen Verfahrensschritte und die gleichen Konstruktionsprinzipien.The exchange process of the sleeves 1 has been dealt with in FIG. 6 on the basis of the printing form sleeve 1. However, the same process steps and the same construction principles apply to the transmission sleeve 1 a with the rubber layer 11.

Claims (10)

1. Apparatus for indirectly printing on a print material in web form comprising three printing mechanism cylinders which are respectively mounted with their ends in side walls (12, 13, Figure 7) during the printing operation, wherein the plate cylinder carries an interchangeable sleeve and the middle cylinder is a blanket cylinder which is provided with an interchangeable sleeve (1 a) with a flexible surface (11) and by way of which a print image (8) can be applied from the outer plate cylinder on to the print material in web form which is guided between the middle blanket cylinder (5) and an impression cylinder, wherein the blanket cylinder (5) is fixedly mounted at one end (30, Figure 7) in a side wall (12) and at the other end (31, Figure 7) can be released from the associated side wall (13) when the machine is stopped and arranged in the last-mentioned side wall (13) opposite the blanket cylinder (5) is an opening (34, Figure 7) which is larger than the diameter of the sleeve (1 a, Figure 5) which is provided with an elastic layer (11) and which can be fitted on to the blanket cylinder (5) so that the sleeve (1 a, Figure 5) can be pushed on to the blanket cylinder (5) from the side through the opening (34, Figure 7) at the height of the blanket cylinder (5) and the blanket cylinder (5) is of a lightweight construction.
2. Apparatus according to claim 1 characterised in that the sleeve (1 a) is force-lockingly fixed on the cylinder (5).
3. Apparatus according to claim 2 characterised in that the sleeve (1 a) can be acted upon by the pressure of a medium on its inside surface (10), it can be stretched, it can be pushed on to the cylinder (5), and it can then be relieved of pressure.
4. Apparatus according to claim 2 characterised in that the sleeve (1 a) can be pushed on to the surfaces (6) of the cylinders (5) and then the cylinders (5) can be increased in terms of their diameter and, when that happens, their surfaces (6) can be pressed against the inside surfaces (10) of the sleeves (1 a).
5. Apparatus according to claim 4 characterised in that pressure can be hydraulically applied to the surfaces of the cylinders (5).
6. Apparatus according to claim 1 characterised in that a mounting (32) can be pivoted away from one end (31) of a cylinder (5) and the sleeve (1 a) can be drawn off the surface of the cylinder (5) over said end (31) of the cylinder (5), replaced by another, and the other sleeve (1 a) can be pushed on to the cylinder (5) over said end (31).
7. Apparatus according to claim 1 characterised in that the cylinders (5) are cylinder shells in the form of hollow cylinders.
8. Apparatus according to claim 7 characterised in that provided between the sleeve (1 a) and a carrier surface which defines the cylinder (5) relative to the sleeve (1 a) is an air cushion which lifts the sleeve off the carrier surface for the purposes of the fitting operation.
9. Apparatus according to claim 1 characterised in that the cylinders (5) are mounted in overhung relationship at their ends (30) which are fixedly mounted in the printing machine.
10. Apparatus according to claims 1 to 9 characterised in that on their surfaces which are towards the print carrier the transfer sleeves (1 a) are provided with an elastic covering which seamlessly surrounds the sleeves.
EP86115898A 1985-12-11 1986-11-15 Device for printing a web Expired - Lifetime EP0225509B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP92121151A EP0549936B1 (en) 1985-12-11 1986-11-15 Transfer cylinder with exchangeable sleeve, supported between two printing unit side walls
AT86115898T ATE93772T1 (en) 1985-12-11 1986-11-15 DEVICE FOR PRINTING A WEB.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853543704 DE3543704A1 (en) 1985-12-11 1985-12-11 DEVICE AND METHOD FOR PRINTING A TRAIN
DE3543704 1985-12-11

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP92121151A Division EP0549936B1 (en) 1985-12-11 1986-11-15 Transfer cylinder with exchangeable sleeve, supported between two printing unit side walls
EP92121151.2 Division-Into 1992-12-11

Publications (4)

Publication Number Publication Date
EP0225509A2 EP0225509A2 (en) 1987-06-16
EP0225509A3 EP0225509A3 (en) 1989-04-12
EP0225509B1 true EP0225509B1 (en) 1993-09-01
EP0225509B2 EP0225509B2 (en) 2000-05-24

Family

ID=6288148

Family Applications (2)

Application Number Title Priority Date Filing Date
EP86115898A Expired - Lifetime EP0225509B2 (en) 1985-12-11 1986-11-15 Device for printing a web
EP92121151A Revoked EP0549936B1 (en) 1985-12-11 1986-11-15 Transfer cylinder with exchangeable sleeve, supported between two printing unit side walls

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP92121151A Revoked EP0549936B1 (en) 1985-12-11 1986-11-15 Transfer cylinder with exchangeable sleeve, supported between two printing unit side walls

Country Status (11)

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US (2) US4913048A (en)
EP (2) EP0225509B2 (en)
JP (1) JP2519225B2 (en)
KR (1) KR100188463B1 (en)
AT (1) ATE93772T1 (en)
BR (1) BR8606104A (en)
CS (1) CS274722B2 (en)
DD (1) DD250900A5 (en)
DE (3) DE3543704A1 (en)
ES (1) ES2044831T3 (en)
RU (1) RU1828434C (en)

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CS274722B2 (en) 1991-10-15
EP0225509A2 (en) 1987-06-16
EP0225509A3 (en) 1989-04-12
DE3543704A1 (en) 1987-06-19
CS915186A2 (en) 1990-09-12
JP2519225B2 (en) 1996-07-31
KR870005807A (en) 1987-07-07
DE3543704C2 (en) 1993-06-17
ES2044831T3 (en) 1994-01-16
RU1828434C (en) 1993-07-15
US4913048A (en) 1990-04-03
DE3688969D1 (en) 1993-10-07
KR100188463B1 (en) 1999-06-01
JPS62218130A (en) 1987-09-25
DE3650281D1 (en) 1995-04-27
USRE34970E (en) 1995-06-20
BR8606104A (en) 1987-09-15
EP0549936A1 (en) 1993-07-07
EP0225509B2 (en) 2000-05-24
EP0549936B1 (en) 1995-03-22
DD250900A5 (en) 1987-10-28
ATE93772T1 (en) 1993-09-15

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