EP0144334B1 - Attachment for printing plate - Google Patents

Attachment for printing plate Download PDF

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Publication number
EP0144334B1
EP0144334B1 EP84901345A EP84901345A EP0144334B1 EP 0144334 B1 EP0144334 B1 EP 0144334B1 EP 84901345 A EP84901345 A EP 84901345A EP 84901345 A EP84901345 A EP 84901345A EP 0144334 B1 EP0144334 B1 EP 0144334B1
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EP
European Patent Office
Prior art keywords
cylinder
bracket
bracket according
printing
shaft
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
Application number
EP84901345A
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German (de)
French (fr)
Other versions
EP0144334A1 (en
Inventor
Reiner Roosen
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Individual
Original Assignee
Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to AT84901345T priority Critical patent/ATE28057T1/en
Publication of EP0144334A1 publication Critical patent/EP0144334A1/en
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Publication of EP0144334B1 publication Critical patent/EP0144334B1/en
Expired legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/005—Attaching and registering printing formes to supports
    • 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
    • Y10S101/36—Means for registering or alignment of print plates on print press structure

Definitions

  • the invention relates to a holder for printing plates to be applied to printing cylinders of a flexographic printing machine, the longitudinal axis of the holder being aligned with the longitudinal axis of the cylinder and the holder comprising a rail which can be detachably arranged on the cylinder.
  • Flexographic printing is a rotary high-pressure process for, for example, imprints on packaging, forms, brochures or the like, in which printing plates consisting of photopolymers or rubber are preferably glued to the printing cylinders.
  • US-A-2,641,181 describes a holder of the type described at the outset, which is fixedly connected to the cylinder by means of holes drilled in the cylinder surface. Due to the type of attachment alone, an undesirable installation effort is required, and an interchangeable insert for several cylinders is not possible or is only possible with difficulty.
  • the rail has projections or recesses which interact with recesses or projections present in the pressure plates and that the holder aligned with the longitudinal axis of the cylinder can be supported by centering elements on the shaft of the cylinder and / or this at least partially surrounds.
  • This bracket is attached to the printing cylinder when a new plate or a new printing plate is to be glued to the printing cylinder. In doing so, there must always be a clear orientation with respect to the pressure cylinder axis. This is ensured according to the invention by the self-centering of the holder. After this has been done, the section which alternates with the rail is detached from the rail in order - after the holder itself has been removed - to also glue this area onto the printing cylinder.
  • the clichés are applied to the other printing cylinders, which have a clear orientation to one another in the machine. This ensures that the individual printing plates are arranged with an exact fit to one another, so that the finished printing work has no undesired overlaps originating from the individual clichés.
  • FIG. 1 shows, by way of example, a printing cylinder 14 of a flexographic printing press with a removable holder 10 which is intended for aligning printing plates to be arranged on the printing cylinder 14.
  • the holder 10 preferably has the shape of a rail 12 which has laterally angled end sections 20 and 22 which in turn interact with the shaft 18 of the pressure cylinder 14.
  • sections 20 and 22 have hollow cylindrical sections 28 and 30, the inside diameter of which is adapted to the outside diameter of shaft 18. Accordingly, if the sections 28 and 30 are placed on the shaft 18, the rail 12 is aligned in the longitudinal axis direction of the printing cylinder 14.
  • Sections 20 and 22 of rail 12 can also be designed differently, e.g. B. have a portion that engages around the shaft 18 from below.
  • the sections 20 and 22 run parallel or almost parallel to the end faces 26 of the printing cylinder 14 and can be attached to this by means of a fastening device such.
  • a screw 24 can be positioned non-rotatably. So that the rail can assume a desired position not only parallel to the longitudinal axis of the cylinder 14, but also with respect to the circumferential surface, without extensive adjustment work, longitudinal slots 32 and 34 are provided, which are in the longitudinal direction of the rail 12, that is to say parallel to the longitudinal axis of the cylinder 14 , run.
  • the surface of the printing cylinder 14 now has marking lines, not shown, to which the slots 32 and 34 are aligned will.
  • the holder 10 assumes the desired position relative to the cylinder 14 in order to be able to apply printing plates or clichés, not shown, which are then arranged with a precise fit on the printing cylinder 14 and in relation to further printing cylinders.
  • the rail 12 in the exemplary embodiment has projections 16, which are assigned corresponding recesses on one edge of the pressure plate.
  • the recesses are penetrated by the projections 16. This gives the cliché the precise alignment with the printing cylinder 14.
  • the section of the printing plate located outside the rail can then be glued to the printing plate without difficulty. Then the section of the plate that interacts with the rail 12 is lifted off the cliché in order to be able to remove the holder 10.
  • the corresponding section of the pressure plate is also pressed onto the pressure plate 14 and glued.
  • the holder 10 is - as described above - applied to further printing cylinders of the flexographic printing press which are clearly oriented towards the printing cylinders 14 in order to allow the projections 16 to interact with the recesses of further clichés , which ensures that the other clichés to be used also have the exact fit on the printing cylinders, which is required that the finished printing does not show any undesired overlaps from the individual printing plates.
  • the printing plates applied by means of the holder according to the invention then print in register.
  • a holder 38 is shown in side view, which is arranged on the shaft 18 of the printing cylinder 14 precisely, but releasably.
  • the holder 38 also comprises a rail 40 with projections 42 which can pass through recesses of a cliché, not shown.
  • Cheeks 46 and 48 which can be separated, run along the end faces (the end face 44 of the cylinder 14 is shown), which together form sections which correspond to the function according to the elements 20, 22, 24, 28, 30 of the exemplary embodiment according to FIG. 1.
  • the jaws 46 and 48 which are rotatable about the axis 50, have V-shaped recesses 52 and 54 in the regions facing one another, which, when assembled, form a quadrangular shape and which have their boundaries 56, 58, 60 and 62 on the cylinder 14 attached bracket 38 come to rest in sections on the core or the shaft 18. This results in a self-centering, for which the jaws 46 and 48, due to spring force, show the endeavor to keep the free area formed by the recesses 52 and 54 as small as possible.
  • a locking element 64 which can be pivoted and can be introduced into a recess 66 of the jaw 48 in such a way that after the holder 38 has been aligned in a precise position on the cylinder 14 by means of the knurled screw 68 or a similarly acting element the jaws 46 and 48 are tightened in order to rest non-rotatably on the shaft 18. This ensures that the holder 38 can no longer be rotated in an uncontrolled manner.
  • FIGS. 3 to 5 show a further embodiment of a holder 70 according to the invention which is to be positioned precisely on a printing cylinder 72 of a flexographic printing press with respect to the longitudinal axis 74 of the cylinder 72.
  • the bracket comprises a bar 76 which has projections 78 on which clichés are to be arranged in the manner described above.
  • the strip 76 is slidably arranged on a wedge 79, which in turn is preferably a square tube 80 as a carrier.
  • the slidability of the bar 76 takes place via a sliding block 84 which is embedded in the wedge 79 on the one hand and on the other hand received by the rear of the bar 76.
  • the bar 76 is preferably fixed in relation to the connecting tube 80 by means of a knurled screw 82.
  • the displaceability of the bar 76 in relation to the support tube 80 has the advantage that the bar 76 and thus the cliché can be moved horizontally to the pressure cylinder 72.
  • connection plate 90 extends on both sides of the end faces 88 of the pressure cylinder 72, to which in turn a centering element 92 and a tensioning lever 94 are fastened. Furthermore, the connection plate 90 has in the upper region a web 96 which runs parallel to or approximately parallel to the square tube 80 and is angled from the connection plate 90 and which is penetrated by a tensioning screw 98 for interacting with the tensioning lever 94.
  • the centering element 92 now has a preferably V-shaped recess 100, which can be placed on the pin or the shaft 102 of the pressure cylinder 72. This results in self-centering. So that the exact alignment of the bar 76 and thus the cliché takes place in relation to the pressure cylinder 72, the centering element 92 is adjustable via an adjusting screw 104 with respect to the connecting plate 90 in order to carry out pinning when the positional alignment with the longitudinal axis 74 of the pressure cylinder 72 is achieved to be able (indicated by reference numerals 106, 108).
  • the pin 102 is removed from the tensioning lever 94 grips, which ensures immovability of the bracket 70 on the pin 102.
  • the tensioning lever 94 is moved in the direction of the pin by means of the tensioning screw 98 in order to interact with a lower leg 110 on the underside or a cut on the underside of the shaft 102.
  • the clamping lever 94 is pivotable about a pin 112 and must be moved against the spring force exerted by a compression spring 114 in the direction of the pin 102 by means of the clamping screw 98; because in the normal position, the clamping lever 94 is pivoted away from the pin 102, so that it can also be used as a handle for the holder 70.
  • clichés can now be applied to the bar 76 or the projections 78 in a precise position on the circumference of the printing cylinder 72, elements of the holder 70 then having to be exchanged if the circumference, pin diameter or length of the printing cylinder 72 should change. If the circumference and the pin 102 of the pressure cylinder 72 remain constant as the length changes, then only the connecting tube 80 has to be exchanged without changes in the connection plates 90 connected via the pins 86, the centering elements 92 emanating from them or the tensioning lever 94 being necessary is.
  • the diameter of the cylinder pin 102 is changed without the circumference and length of the pressure cylinder 72 being varied, only the centering plates 92 need to be replaced. Otherwise, the other elements can be retained in order to ensure a positionally accurate alignment of the holder 70 with respect to the longitudinal axis 74 of the printing cylinder 72. If only the circumference of the cylinder is changed and the length of the pressure cylinder is kept constant, an exchange of both the centering elements and the clamping levers is necessary in order to enable the holder 70 to be aligned in the correct position.
  • the holder according to the invention can be included from the outset with an assortment of centering elements, tensioning levers or holding tubes adapted to different cylinder dimensions, in order to be able to use the holder according to the invention without problems in connection with different cylinder types.
  • centering elements 92 can also be inserted vertically displaceably in the connecting plates 90, in order to enable adaptation to different cylinder circumferences and / or pin diameters. In these cases, the clamping levers only have to be replaced if necessary.

Abstract

Attachment (70) intended to printing plates which are applied to a printing roll (72) of a flexography machine enabling an accurate adjustment of various printing plates with respect to each other. To this effect, the attachment (70) comprises a rail (76) releasably applicable to the cylinder, respectively the cylinders (72), which is provided on the side thereof with protuberances (78) interacting with recesses provided on the printing plates. In order to achieve a simple and accurate positioning, the attachment (70) may bear by automatic centering on the printing roll shaft, respectively shafts (102).

Description

Die Erfindung bezieht sich auf eine Halterung für auf Druckzylinder einer Flexodruckmaschine aufzubringende Druckplatten, wobei die Längsachse der Halterung auf die Längsachse des Zylinders ausgerichtet ist und die Halterung eine auf dem Zylinder lösbar anzuordnende Schiene umfaßt.The invention relates to a holder for printing plates to be applied to printing cylinders of a flexographic printing machine, the longitudinal axis of the holder being aligned with the longitudinal axis of the cylinder and the holder comprising a rail which can be detachably arranged on the cylinder.

Beim Flexodruck handelt es sich um ein rotatives Hochdruckverfahren für zum Beispiel Aufdrucke auf Verpackungsmittel, Formulare, Prospekte oder ähnliches, bei dem vorzugsweise aus Photopolymeren oder Gummi bestehende Druckplatten auf die Druckzylinder geklebt werden.Flexographic printing is a rotary high-pressure process for, for example, imprints on packaging, forms, brochures or the like, in which printing plates consisting of photopolymers or rubber are preferably glued to the printing cylinders.

Will man auf ein und dasselbe Material auf einfachem Weg Beschriftungen oder zum Beispiel Abbildungen in unterschiedlichen Farben drucken, so werden verschiedene Klischees benutzt, die grundsätzlich auf verschiedene Druckzylinder aufgebracht werden, um so die Druckarbeit durchführen zu können. Damit jedoch für die Druckarbeit hinsichtlich der von den verschiedenen Klischees stammenden Drucke die gewünschte Zuordnung zueinander erfolgt, muß darauf geachtet werden, daß die Klischees eine eindeutige einander zuzuordnende Position auf den Druckzylindern erfahren. Häufig bedient man sich dabei aufwendiger Aufklebegeräte, die mittels Spiegeleinrichtung oder anderer optischer Einrichtungen die passgenaue Zuordnung einer Farbe zur anderen ermöglichen. Diese Art der Klischeenmontage ist nicht nur sehr aufwendig, sondern birgt erhebliche Fehlerquellen.If you want to print inscriptions or, for example, illustrations in different colors on the same material in a simple way, different clichés are used, which are basically applied to different printing cylinders so that the printing work can be carried out. However, in order for the desired assignment to one another for the printing work with regard to the prints originating from the various clichés, care must be taken to ensure that the clichés experience a clear, assignable position on the printing cylinders. Often, one uses elaborate sticking devices, which allow the matching of one color to another by means of a mirror device or other optical devices. This type of cliché assembly is not only very complex, but also harbors considerable sources of error.

In der US-A-2,641,181 ist eine Halterung der eingangs beschriebenen Art beschrieben, die über in der Zylinderoberfläche eingelassene Bohrungen fest mit dem Zylinder verbunden ist. Allein durch die Art der Befestigung ist ein unerwünschter Montageaufwand erforderlich, zudem ein austauschbarer Einsatz für mehrere Zylinder nicht oder nur schwer möglich ist.US-A-2,641,181 describes a holder of the type described at the outset, which is fixedly connected to the cylinder by means of holes drilled in the cylinder surface. Due to the type of attachment alone, an undesirable installation effort is required, and an interchangeable insert for several cylinders is not possible or is only possible with difficulty.

Es ist daher Aufgabe der vorliegenden Erfindung, eine Halterung gemäß Oberbegriff des Anspruchs 1 so auszubilden, daß problemlos und paßgenau verschiedene Druckplatten positionsgenau auf den Druckzylindern der Flexodruckmaschine aufgebracht werden, ohne daß Änderungen an den Druckzylindern erforderlich sind.It is therefore an object of the present invention to design a holder according to the preamble of claim 1 so that various printing plates can be easily and precisely fitted onto the printing cylinders of the flexographic printing press without changes to the printing cylinders being required.

Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Schiene Vorsprünge oder Ausnehmungen aufweist, die mit in den Druckplatten vorhandenen Ausnehmungen oder Vorsprüngen in Wechselwirkung treten und daß die auf die Längsachse des Zylinders ausgerichtete Halterung über Zentrierelemente auf der Welle des Zylinders abstützbar ist und/oder diese zumindest teilweise umgibt. Diese Halterung wird auf dem Druckzylinder befestigt, wenn ein neues Klischee bzw. eine neue Druckplatte auf dem Druckzylinder geklebt werden soll. Dabei muß stets eine eindeutige Orientierung in bezug auf die Druckzylinderachse erfolgen. Dies wird erfindungsgemäß durch die Selbstzentrierung der Halterung sichergestellt. Nachdem dies erfolgt ist, wird der mit der Schiene in Wechselwikrung tretende Abschnitt von der Schiene gelöst, um - nachdem die Halterung selbst entfernt ist - diesen Bereich auch auf dem Druckzylinder festzukleben. Entsprechend werden die Klischees auf den anderen Druckzylindern, die zueinander eine eindeutige Orientierung in der Maschine aufweisen, aufgebracht. Dadurch ist sichergestellt, daß die einzelnen Druckplatten paßgenau zueinander angeordnet sind, so daß die fertige Druckarbeit keine unerwünschten überschneidungen herrührend von den einzelnen Klischees aufweist.The object is achieved in that the rail has projections or recesses which interact with recesses or projections present in the pressure plates and that the holder aligned with the longitudinal axis of the cylinder can be supported by centering elements on the shaft of the cylinder and / or this at least partially surrounds. This bracket is attached to the printing cylinder when a new plate or a new printing plate is to be glued to the printing cylinder. In doing so, there must always be a clear orientation with respect to the pressure cylinder axis. This is ensured according to the invention by the self-centering of the holder. After this has been done, the section which alternates with the rail is detached from the rail in order - after the holder itself has been removed - to also glue this area onto the printing cylinder. Accordingly, the clichés are applied to the other printing cylinders, which have a clear orientation to one another in the machine. This ensures that the individual printing plates are arranged with an exact fit to one another, so that the finished printing work has no undesired overlaps originating from the individual clichés.

Es zeigen:

  • Fig. 1 eine auf einen Druckzylinder aufzubringende Halterung,
  • Fig. 2 ein weiteres Ausführungsbeispiel einer auf einem Druckzylinder angeordneten Halterung in Seitenansicht und teilweise weggebrochen,
  • Fig. 3 eine dritte Ausführungsform in Seitenansicht,
  • Fig. 4 eine Vorderansicht eines Ausschnitts der Ausführungsform nach Fig. 3 und
  • Fig. 5 eine Schnittdarstellung entlang der Linie V-V in Fig. 4
Show it:
  • 1 is a bracket to be applied to a pressure cylinder,
  • 2 shows another embodiment of a holder arranged on a printing cylinder in side view and partially broken away,
  • 3 shows a third embodiment in side view,
  • Fig. 4 is a front view of a section of the embodiment of FIGS. 3 and
  • FIG. 5 shows a sectional illustration along the line VV in FIG. 4

In Fig. 1 ist beispielhaft ein Druckzylinder 14 einer Flexodruckmaschine mit einer entfernbaren Halterung 10 dargestellt, die zum Ausrichten von auf den Druckzylinder 14 anzuordnende Druckplatten bestimmt ist. Dabei weist die Halterung 10 vorzugsweise die Form einer Schiene 12 auf, die seitlich abgewinkelte Endabschnitte 20 und 22 aufweist, die ihrerseits mit der Welle 18 des Druckzylinders 14 in Wechselwirkung treten. Im Ausführungsbeispiel der Fig. 1 weisen die Abschnitte 20 und 22 hohlzylinderförmige Abschnitte 28 und 30 auf, deren Innendurchmesser dem Aussendurchmesser der Welle 18 angepaßt ist. Werden demzufolge die Abschnitte 28 und 30 auf die Welle 18 gesetzt, so ist die Schiene 12 in Achsenlängsrichtung des Druckzylinders 14 ausgerichtet. Auch können die Abschnitte 20 und 22 der Schiene 12 anders ausgebildet sein z. B. einen Abschnitt aufweisen, der die Welle 18 von unten umgreift.1 shows, by way of example, a printing cylinder 14 of a flexographic printing press with a removable holder 10 which is intended for aligning printing plates to be arranged on the printing cylinder 14. The holder 10 preferably has the shape of a rail 12 which has laterally angled end sections 20 and 22 which in turn interact with the shaft 18 of the pressure cylinder 14. In the exemplary embodiment in FIG. 1, sections 20 and 22 have hollow cylindrical sections 28 and 30, the inside diameter of which is adapted to the outside diameter of shaft 18. Accordingly, if the sections 28 and 30 are placed on the shaft 18, the rail 12 is aligned in the longitudinal axis direction of the printing cylinder 14. Sections 20 and 22 of rail 12 can also be designed differently, e.g. B. have a portion that engages around the shaft 18 from below.

Die Abschnitte 20 und 22 laufen parallel oder nahezu parallel zu den Stirnflächen 26 des Druckzylinders 14 und können an diesen mittels einer Befestigungseinrichtung wie z. B. einer Schraube 24 unverdrehbar positioniert werden. Damit die Schiene nicht nur parallel zur Längsachse des Zylinders 14, sondern auch in Bezug auf die Umfangsfläche eine gewünschte Position ohne aufwendige justierarbeiten einnehmen kann, sind Längsschlitze 32 bzw. 34 vorgesehen, die in Längsrichtung der Schiene 12, also parallel zur Längsachse des Zylinders 14, verlaufen. Die Oberfläche des Druckzylinders 14 weist nun nicht dargestellte Markierungsstriche auf, auf die die Schlitze 32 und 34 ausgerichtet werden. Sodann nimmt die Halterung 10 die gewünschte Position zum Zylinder 14 ein, um nicht dargestellte Druckplatten bzw. Klischees aufbringen zu können, die dann paßgenau auf dem Druckzylinder 14 und in bezug auf weitere Druckzylinder angeordnet sind. Zu diesem Zweck weist die Schiene 12 im Ausführungsbeispiel Vorsprünge 16 auf, denen entsprechende Ausnehmungen an einem Rand der Druckplatte zugeordnet sind. Um nun eine Druckplatte auf den Zylinder 14 aufzubringen, werden deren Ausnehmungen von den Vorsprüngen 16 durchsetzt. Dadurch erhält das Klischee die paßgenaue Ausrichtung zum Druckzylinder 14. Sodann kann der außerhalb der Schiene befindliche Abschnitt der Druckplatte auf der Druckplatte ohne Schwierigkeiten geklebt werden. Anschließend wird der mit der Schiene 12 in Wechselwirkung tretende Abschnitt des Klischees von jener abgehoben, um die Halterung 10 entfernen zu können. Schließlich wird der entsprechende Abschnitt der Druckplatte auch auf die Druckplatte 14 gedrückt und festgeklebt. Soll nun ein zu druckendes Material mittels eines zweiten Klischees bedruckt werden, so wird die Halterung 10 - wie zuvor beschrieben - auf weitere zu den Druckzylindern 14 eindeutig orientierte Druckzylinder der Flexodruckmaschine aufgebracht, um die Vorsprünge 16 mit den Ausnehmungen weiterer Klischees in Wechselwirkung treten zu lassen, wodurch sichergestellt ist, daß die weiteren zu verwendenden Klischees gleichfalls die paßgenaue Anordnung auf den Druckzylindern aufweisen, die erforderlich ist, daß die fertige Druckarbeit keine unerwünschten Überschneidungen von den einzelnen Druckplatten zeigt. Die mittels der erfindungsgemäßen Halterung aufgebrachten Druckplatten drucken dann paßgenau.The sections 20 and 22 run parallel or almost parallel to the end faces 26 of the printing cylinder 14 and can be attached to this by means of a fastening device such. B. a screw 24 can be positioned non-rotatably. So that the rail can assume a desired position not only parallel to the longitudinal axis of the cylinder 14, but also with respect to the circumferential surface, without extensive adjustment work, longitudinal slots 32 and 34 are provided, which are in the longitudinal direction of the rail 12, that is to say parallel to the longitudinal axis of the cylinder 14 , run. The surface of the printing cylinder 14 now has marking lines, not shown, to which the slots 32 and 34 are aligned will. Then the holder 10 assumes the desired position relative to the cylinder 14 in order to be able to apply printing plates or clichés, not shown, which are then arranged with a precise fit on the printing cylinder 14 and in relation to further printing cylinders. For this purpose, the rail 12 in the exemplary embodiment has projections 16, which are assigned corresponding recesses on one edge of the pressure plate. In order to apply a pressure plate to the cylinder 14, the recesses are penetrated by the projections 16. This gives the cliché the precise alignment with the printing cylinder 14. The section of the printing plate located outside the rail can then be glued to the printing plate without difficulty. Then the section of the plate that interacts with the rail 12 is lifted off the cliché in order to be able to remove the holder 10. Finally, the corresponding section of the pressure plate is also pressed onto the pressure plate 14 and glued. If a material to be printed is now to be printed by means of a second cliché, the holder 10 is - as described above - applied to further printing cylinders of the flexographic printing press which are clearly oriented towards the printing cylinders 14 in order to allow the projections 16 to interact with the recesses of further clichés , which ensures that the other clichés to be used also have the exact fit on the printing cylinders, which is required that the finished printing does not show any undesired overlaps from the individual printing plates. The printing plates applied by means of the holder according to the invention then print in register.

In Fig. 2 ist in Seitenansicht eine Halterung 38 dargestellt, die auf der Welle 18 des Druckzylinders 14 positionsgenau, jedoch lösbar angeordnet ist. Die Halterung 38 umfaßt ebenfalls eine Schiene 40 mit Vorsprüngen 42, die Ausnehmungen eines nicht dargestellten Klischees durchsetzen können. Entlang der Stirnflächen (dargestellt die Stirnfläche 44 des Zylinders 14) verlaufen auseinanderscherbare Backen 46 und 48, die zusammen Abschnitte bilden, die der Funktion nach den Elementen 20, 22, 24, 28, 30 des Ausführungsbeispiels nach Fig. 1 entsprechen. Die Backen 46 und 48, die um die Achse 50 drehbar sind, weisen in den einander zugewandten Bereichen V-förmige Ausnehmungen 52 und 54 auf, die zusammengesetzt eine Viereckform bilden und die mit ihren Begrenzungen 56, 58, 60 und 62 bei auf dem Zylinder 14 aufgesetzter Halterung 38 abschnittweise an den Kern oder der Welle 18 zu liegen kommen. Dadurch ergibt sich eine Selbstzentrierung, zu dem die Backen 46 und 48 durch Federkraft bedingt das Bestreben zeigen, die von den Ausnehmungen 52 und 54 gebildeten Freifläche so klein wie möglich zu halten. Von dem unteren Bereich der Backe 46 geht ferner ein Feststellelement 64 aus, das verschwenkbar ist und in eine - Ausnehmung 66 der Backe 48 derart einbringbar ist, daß nach positionsgenauem Ausrichten der Halterung 38 auf dem Zylinder 14 mittels der Rändelschraube 68 oder ein ähnlich wirkendes Element die Backe 46 und 48 festgezogen werden, um unverdrehbar auf der Welle 18 anzuliegen. Dadurch ist gewährleistet, daß die Halterung 38 nicht mehr unkontrolliert verdreht werden kann.In Fig. 2, a holder 38 is shown in side view, which is arranged on the shaft 18 of the printing cylinder 14 precisely, but releasably. The holder 38 also comprises a rail 40 with projections 42 which can pass through recesses of a cliché, not shown. Cheeks 46 and 48, which can be separated, run along the end faces (the end face 44 of the cylinder 14 is shown), which together form sections which correspond to the function according to the elements 20, 22, 24, 28, 30 of the exemplary embodiment according to FIG. 1. The jaws 46 and 48, which are rotatable about the axis 50, have V-shaped recesses 52 and 54 in the regions facing one another, which, when assembled, form a quadrangular shape and which have their boundaries 56, 58, 60 and 62 on the cylinder 14 attached bracket 38 come to rest in sections on the core or the shaft 18. This results in a self-centering, for which the jaws 46 and 48, due to spring force, show the endeavor to keep the free area formed by the recesses 52 and 54 as small as possible. From the lower region of the jaw 46 there is also a locking element 64 which can be pivoted and can be introduced into a recess 66 of the jaw 48 in such a way that after the holder 38 has been aligned in a precise position on the cylinder 14 by means of the knurled screw 68 or a similarly acting element the jaws 46 and 48 are tightened in order to rest non-rotatably on the shaft 18. This ensures that the holder 38 can no longer be rotated in an uncontrolled manner.

In den Fig. 3 bis 5 ist eine weitere Ausführungsform einer erfindungsgemäßen Halterung 70 dargestellt, die auf einen Druckzylinder 72 einer Flexodruckmaschine positionsgenau in Bezug auf die Längsachse 74 des Zylinders 72 ausgerichtet werden soll. Dabei umfaßt die Halterung eine Leiste 76, die Vorsprünge 78 aufweist, an der in der zuvor beschriebenen Art Klischees angeordnet werden sollen. Die Leiste 76 ist verschiebbar auf einem Keil 79 angeordnet, der seinerseits von vorzugsweise einem Vierkantrohr 80 als Träger ausgeht. Die Verschiebbarkeit der Leiste 76 erfolgt über einen Nutenstein 84 der zum einen in dem Keil 79 eingelassen und zum anderen von der Rückseite der Leiste 76 aufgenommen wird. Das Festlegen der Leiste 76 in Bezug auf das Verbindungsrohr 80 erfolgt vorzugsweise über eine Rändelschraube 82. Die Verschiebbarkeit der Leiste 76 in Bezug auf das Trägerrohr 80 hat den Vorteil, daß die Leiste 76 und damit das Klischee horizontal zum Druckzylinder 72 verschoben werden kann.FIGS. 3 to 5 show a further embodiment of a holder 70 according to the invention which is to be positioned precisely on a printing cylinder 72 of a flexographic printing press with respect to the longitudinal axis 74 of the cylinder 72. The bracket comprises a bar 76 which has projections 78 on which clichés are to be arranged in the manner described above. The strip 76 is slidably arranged on a wedge 79, which in turn is preferably a square tube 80 as a carrier. The slidability of the bar 76 takes place via a sliding block 84 which is embedded in the wedge 79 on the one hand and on the other hand received by the rear of the bar 76. The bar 76 is preferably fixed in relation to the connecting tube 80 by means of a knurled screw 82. The displaceability of the bar 76 in relation to the support tube 80 has the advantage that the bar 76 and thus the cliché can be moved horizontally to the pressure cylinder 72.

Von dem Trägerrohr 80 über Zapfen 86 (dargestellt nur der linke Zapfen) geht zu beiden Seiten der Stirnflächen 88 des Druckzylinders 72 jeweils eine Anschlußplatte 90 aus, an der ihrerseits ein Zentrierelement 92 sowie ein Spannhebel 94 befestigt ist. Ferner weist die Anschlußplatte 90 im oberen Bereich einen parallel oder in etwa parallel zum Vierkantrohr 80 verlaufenden von der Anschlußplatte 90 abgewinkelten Steg 96 auf, der von einer Spannschraube 98 zum Wechselwirken mit dem Spannhebel 94 durchsetzt ist.From the support tube 80 via pin 86 (only the left pin shown) a connection plate 90 extends on both sides of the end faces 88 of the pressure cylinder 72, to which in turn a centering element 92 and a tensioning lever 94 are fastened. Furthermore, the connection plate 90 has in the upper region a web 96 which runs parallel to or approximately parallel to the square tube 80 and is angled from the connection plate 90 and which is penetrated by a tensioning screw 98 for interacting with the tensioning lever 94.

Das Zentrierelement 92 weist nun eine vorzugsweise V-förmige Aussparung 100 auf, die auf den Zapfen bzw. die Welle 102 des Druckzylinders 72 aufsetzbar ist. Dadurch erfolgt eine Selbstzentrierung. Damit die genaue Ausrichtung der Leiste 76 und damit des Klischees in Bezug auf den Druckzylinder 72 erfolgt, ist das Zentrierelement 92 über eine Stellschraube 104 in Bezug auf die Anschlußplatte 90 verstellbar, um bei erreichter positionsgenauer Ausrichtung auf die Längsachse 74 des Druckzylinders 72 eine Verstiftung vornehmen zu können (angedeutet durch Bezugszeichen 106, 108).The centering element 92 now has a preferably V-shaped recess 100, which can be placed on the pin or the shaft 102 of the pressure cylinder 72. This results in self-centering. So that the exact alignment of the bar 76 and thus the cliché takes place in relation to the pressure cylinder 72, the centering element 92 is adjustable via an adjusting screw 104 with respect to the connecting plate 90 in order to carry out pinning when the positional alignment with the longitudinal axis 74 of the pressure cylinder 72 is achieved to be able (indicated by reference numerals 106, 108).

Sobald die Halterung 70 mittels der Zentrierelemente 92, die sich zu beiden Seiten der Stirnflächen 88 des Druckzylinders 72 erstrecken, auf dem Zapfen 102 abgestützt ist, wird der Zapfen 102 von dem Spannhebel 94 unterfaßt, wodurch eine Unverrückbarkeit der Halterung 70 auf dem Zapfen 102 sichergestellt ist. Zu diesem Zweck wird der Spannhebel 94 mittels der Spannschraube 98 in Richtung auf den Zapfen bewegt, um mit einem unteren Schenkel 110 an der Unterseite oder einem Anschnitt der Unterseite der Welle 102 in Wechselwirkung zu treten. Dabei ist der Spannhebel 94 um einen Zapfen 112 verschwenkbar und muß gegen eine Federkraft, die von einer Druckfeder 114 ausgeübt wird, in Richtung auf den Zapfen 102 mittels der Spannschraube 98 bewegt werden; denn in Normalstellung ist der Spannhebel 94 von dem Zapfen 102 weggeschwenkt, so daß jener gleichzeitig als Griff für die Halterung 70 benutzt werden kann.As soon as the holder 70 is supported on the pin 102 by means of the centering elements 92, which extend on both sides of the end faces 88 of the pressure cylinder 72, the pin 102 is removed from the tensioning lever 94 grips, which ensures immovability of the bracket 70 on the pin 102. For this purpose, the tensioning lever 94 is moved in the direction of the pin by means of the tensioning screw 98 in order to interact with a lower leg 110 on the underside or a cut on the underside of the shaft 102. The clamping lever 94 is pivotable about a pin 112 and must be moved against the spring force exerted by a compression spring 114 in the direction of the pin 102 by means of the clamping screw 98; because in the normal position, the clamping lever 94 is pivoted away from the pin 102, so that it can also be used as a handle for the holder 70.

Mittels der erfindungsgemäßen Halterung 70 können nunmehr Klischees auf die Leiste 76 bzw. die Vorsprünge 78 positionsgenau auf den Umfang des Druckzylinders 72 aufgebracht werden, wobei dann Elemente der Halterung 70 ausgetauscht werden müssen, wenn sich Umfang, Zapfendurchmesser oder Länge des Druckzylinders 72 ändern sollten. Bleibt der Umfang und der Zapfen 102 des Druckzylinders 72 bei sich ändernder Länge konstant, so muß nur das Verbindungsrohr 80 ausgetauscht werden, ohne daß Veränderungen hinsichtlich der über die Zapfen 86 verbundenen Anschlußplatten 90, der von diesen ausgehenden Zentrierelemente 92 bzw. der Spannhebel 94 erforderlich ist.By means of the holder 70 according to the invention, clichés can now be applied to the bar 76 or the projections 78 in a precise position on the circumference of the printing cylinder 72, elements of the holder 70 then having to be exchanged if the circumference, pin diameter or length of the printing cylinder 72 should change. If the circumference and the pin 102 of the pressure cylinder 72 remain constant as the length changes, then only the connecting tube 80 has to be exchanged without changes in the connection plates 90 connected via the pins 86, the centering elements 92 emanating from them or the tensioning lever 94 being necessary is.

Wird dagegen der Durchmesser des Zylinderszapfens 102 verändert, ohne daß Umfang und Länge des Druckzylinders 72 variiert werden, so müssen nur die Zentrierplatten 92 ausgetauscht werden. Ansonsten können die anderen Elemente beibehalten werden, um eine positionsgenaue Ausrichtung der Halterung 70 in Bezug auf die Längsachse 74 des Druckzylinders 72 sicherzustellen. Wird bei konstant gehaltenem Zylinderzapfen und Länge des Druckzylinders nur dessen Umfang verändert, so ist ein Austausch sowohl der Zentrierelemente als auch der Spannhebel erforderlich, um die positionsgenaue Ausrichtung der Halterung 70 zu ermöglichen.If, on the other hand, the diameter of the cylinder pin 102 is changed without the circumference and length of the pressure cylinder 72 being varied, only the centering plates 92 need to be replaced. Otherwise, the other elements can be retained in order to ensure a positionally accurate alignment of the holder 70 with respect to the longitudinal axis 74 of the printing cylinder 72. If only the circumference of the cylinder is changed and the length of the pressure cylinder is kept constant, an exchange of both the centering elements and the clamping levers is necessary in order to enable the holder 70 to be aligned in the correct position.

Zu diesem Zweck kann der erfindungsgemäßen Halterung von vornherein ein Sortiment von auf unterschiedliche Zylinderdimensionierungen abgestellte Zentrierelemente, Spannhebel bzw. Halterohre beigegeben sein, um die erfindungsgemäße Halterung problemlos in Verbindung mit verschiedenen Zylindertypen benutzen zu können.For this purpose, the holder according to the invention can be included from the outset with an assortment of centering elements, tensioning levers or holding tubes adapted to different cylinder dimensions, in order to be able to use the holder according to the invention without problems in connection with different cylinder types.

Selbstverständlich können die Zentrierelemente 92 auch vertikal verschiebbar in den Anschlußplatten 90 eingelassen sein, um so eine Anpassung an verschiedene Zylinderumfänge und/oder Zapfendurchmesser zu ermöglichen. In diesen Fällen müssen dann nur gegebenenfalls die Spannhebel ausgetauscht werden.Of course, the centering elements 92 can also be inserted vertically displaceably in the connecting plates 90, in order to enable adaptation to different cylinder circumferences and / or pin diameters. In these cases, the clamping levers only have to be replaced if necessary.

Claims (14)

1. Bracket (10, 38, 70) for printing plates to be fitted to printing cylinders (14, 72) of a flexographic printing press, the longitudinal axis of the bracket being aligned to the longitudinal axis of the cylinder and the bracket comprising a rail (12,40,76) to be arranged loosely on the cylinder,
characterised in that
the rail (12, 40, 76) has projections (16, 42, 78) or recesses which interact with the recesses or projections in the printing plates, and that the bracket (10, 38, 70) aligned to the longitudinal axis of the cylinder is capable of being supported by means of centering elements (46, 48, 92) on the shaft (18, 102) of the cylinder (14, 72) and/or surround them partially at least.
2. Bracket according to Claim 1,
characterised in that
the bracket (10, 38, 70) has a U-shaped design and is capable of being fastened in the exact position on the cylinder (14, 72) by means of fastening elements (24, 64, 92, 94) provided on the outer legs (20, 22, 46,48, 90).
3. Bracket according to Claim 1,
characterised in that
the shaft (102) is capable of being held from below by one clamping lever (94) each on both sides by means of which a force can be produced in the direction towards the respective centering element (92).
4. Bracket according to Claim 1,
characterised in that
the centering element (92) has a more or less V-shaped cutout (100) which interacts with the shaft (102) in sections.
5. Bracket according to Claim 3,
characterised in that
the clamping lever (94) for holding the shaft (102) from below against spring power is capable of being swivelled around an axle (112) preferably by means of a clamping screw (98).
6. Bracket according to Claim 1,
characterised in that
sections of the bracket arranged along the face (44) of the cylinder (14) have movable jaws surrounding the shaft (18).
7. Bracket according to Claim 6,
characterised in that
a self-centering operation is capable of being brought about via the jaws (46, 48) surrounding the shaft (18).
8. Bracket according to Claim 6 or Claim 7,
characterised in that
the sections of the jaws (46, 48) facing one another each have a preferably V-shaped recess (52, 54) on which the shaft (18) rests in sections.
9. Bracket according to Claim 8,
characterised in that
the recesses (52, 54) together essentially result in a rectangular shape.
10. Bracket according to Claim 6,
characterised in that
the jaws (46, 48) are capable of being moved towards one another by means of spring power and are preferably capable of being locked by means of a fastening element (64).
11. Bracket according to Claim 1,
characterised in that
the rail is arranged loosely on the bracket and is movable parallel to the longitudinal axis of the cylinder.
12. Bracket according to Claim 1,
characterised in that
the rail (12, 40) has guide slots in the longitudinal direction which are aligned to the markings provided on the printing cylinder surface (36).
13. Bracket according to Claim 1,
characterised in that
the centering elements (92) are arranged movably vertical to the cylinder axle (74).
14. Bracket according to Claim 4,
characterised in that
the cutouts (100) of the centering elements (92) are movable with reference to the rail (76).
EP84901345A 1983-06-11 1984-03-29 Attachment for printing plate Expired EP0144334B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84901345T ATE28057T1 (en) 1983-06-11 1984-03-29 HOLDER FOR A PRESSURE PLATE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8317151U 1983-06-11
DE19838317151U DE8317151U1 (en) 1983-06-11 1983-06-11 BRACKET FOR A PRESSURE PLATE

Publications (2)

Publication Number Publication Date
EP0144334A1 EP0144334A1 (en) 1985-06-19
EP0144334B1 true EP0144334B1 (en) 1987-07-01

Family

ID=6754187

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84901345A Expired EP0144334B1 (en) 1983-06-11 1984-03-29 Attachment for printing plate

Country Status (9)

Country Link
US (1) US4604811A (en)
EP (1) EP0144334B1 (en)
JP (1) JPS60501549A (en)
AU (1) AU569204B2 (en)
DE (2) DE8317151U1 (en)
DK (1) DK39785A (en)
FI (1) FI72466C (en)
NO (1) NO850489L (en)
WO (1) WO1984004900A1 (en)

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US6273166B1 (en) * 1996-08-15 2001-08-14 Reiner Roosen Adhesive tape feeding device for a pressure cylinder

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US4878407A (en) * 1986-05-01 1989-11-07 The Ward Machinery Company Vacuum die mount
US4825558A (en) * 1987-09-14 1989-05-02 Adflex Corporation Pin bar for mounting flexographic printing plates
DE8912428U1 (en) * 1989-10-19 1991-02-21 Roosen, Reiner, 6450 Hanau, De
US5511479A (en) * 1994-06-27 1996-04-30 Tension Envelope Corporation System and method for providing pin register holes in flexible printing plates and apparatus and method for aligning plates on a flexographic printing press plate cylinder
US5537927A (en) * 1994-08-26 1996-07-23 Tension Envelope Corporation Apparatus and method for precisely drilling alignment pin register holes in pre-marked flexible printing plates
US5701823A (en) * 1997-01-27 1997-12-30 Morris; Jerry L. Self aligning tool for registering rotary printing plates and method of registering plates
US6389705B1 (en) * 2000-03-24 2002-05-21 Silitek Corporation Optical calibration plate and the assembling method for the same

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US2559533A (en) * 1944-11-22 1951-07-03 Joseph S Daniels Printing plate positioner
US2641181A (en) * 1950-11-03 1953-06-09 Leeberg Edward Means for positioning and registering printing members on cylinders of rotary presses
US2810204A (en) * 1954-02-08 1957-10-22 Arnold L Imshaug Color plate register gauge device
US2902771A (en) * 1957-08-07 1959-09-08 Diamond Gardner Corp Method of and apparatus for preregistering printing plates
GB851841A (en) * 1959-01-27 1960-10-19 Timsons Ltd Means facilitating the positioning of printing plates upon rotary printing components
US3206859A (en) * 1960-06-17 1965-09-21 John P Walsh Printing apparatus
DE1611383A1 (en) * 1967-10-06 1970-12-10 Koenig & Bauer Schnellpressfab Process for applying offset plates with holes in register to plate cylinders of offset printing units
US3550283A (en) * 1968-04-02 1970-12-29 Eugene L Bernardi Method and apparatus for applying a printing plate to a support saddle
DE2526446A1 (en) * 1975-06-13 1976-12-23 Roland Offsetmaschf DEVICE FOR ADJUSTING PRINT PLATES ON THE PLATE CYLINDER OF PRINTING MACHINES WITH THE AID OF A READING DEVICE AND COPIES COPIED ON THE PRINT PLATES

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6273166B1 (en) * 1996-08-15 2001-08-14 Reiner Roosen Adhesive tape feeding device for a pressure cylinder

Also Published As

Publication number Publication date
FI850404A0 (en) 1985-01-31
DE3464472D1 (en) 1987-08-06
DK39785D0 (en) 1985-01-29
DK39785A (en) 1985-01-29
FI72466B (en) 1987-02-27
WO1984004900A1 (en) 1984-12-20
AU2740084A (en) 1985-01-04
AU569204B2 (en) 1988-01-21
EP0144334A1 (en) 1985-06-19
DE8317151U1 (en) 1983-11-24
JPS60501549A (en) 1985-09-19
FI850404L (en) 1985-01-31
FI72466C (en) 1987-06-08
US4604811A (en) 1986-08-12
NO850489L (en) 1985-02-08

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