EP0686504A2 - Device for fastening and tensioning printing plates with Z-formed ends - Google Patents

Device for fastening and tensioning printing plates with Z-formed ends Download PDF

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Publication number
EP0686504A2
EP0686504A2 EP95108794A EP95108794A EP0686504A2 EP 0686504 A2 EP0686504 A2 EP 0686504A2 EP 95108794 A EP95108794 A EP 95108794A EP 95108794 A EP95108794 A EP 95108794A EP 0686504 A2 EP0686504 A2 EP 0686504A2
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EP
European Patent Office
Prior art keywords
edges
cylinder
gravure
printing plate
bar
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.)
Granted
Application number
EP95108794A
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German (de)
French (fr)
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EP0686504A3 (en
EP0686504B1 (en
Inventor
Claus Dieter Barrois
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.)
Koenig and Bauer AG
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Koenig and Bauer Albert AG
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Publication of EP0686504A2 publication Critical patent/EP0686504A2/en
Publication of EP0686504A3 publication Critical patent/EP0686504A3/en
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Publication of EP0686504B1 publication Critical patent/EP0686504B1/en
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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
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1281—Devices for attaching printing elements or formes to supports for attaching flexible printing formes details of the printing plate ends
    • 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
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1293—Devices for filling up the cylinder gap; Devices for removing the filler

Definitions

  • the invention relates to a device for fastening and tensioning printing plates with "Z" -shaped ends according to the preamble of claim 1.
  • EP 01 24 008 A2 describes a forme cylinder with a device for clamping flexible printing plates with clamping means for folded ends of a printing plate. These clamping devices are arranged in a pit and designed as a triangular segment body with a hanging edge, the outer surface of which covers the pit gap in the tensioned state of the plate and corresponds to the contour of the forme cylinder.
  • a pressure plate lock is known with which "Z" -shaped pressure plates are attached and tensioned.
  • clamping jaws press against bent limbs of the pressure plate, a cavity being formed on the cylinder periphery between the pressure plate and the clamping jaws.
  • Both devices lead to an impermissible enlargement of the area in which shape deviations of the plate from the cylinder contour can occur, i. H. the plate lies hollow on the gravure cylinder.
  • Rigid metal printing plates in which the shape deviations occur particularly strongly, are used in particular in gravure printing processes.
  • the invention has for its object to provide a device for fastening and tensioning printing plates, in particular gravure printing plates, with "Z" -shaped ends and to adapt the shape of the printing plate in the area of the printing plate ends exactly to the cylinder contour.
  • the advantages that can be achieved with the invention consist in particular in that with the device according to the invention, shape deviations of a printing plate from a forme cylinder contour in the region of the hanging edges, ie. H. hollow of the pressure plate ends can be minimized.
  • the device according to the invention avoids ink splashing in the rotogravure printing process, which is caused by the doctor's non-uniform contact with the rotogravure plate.
  • wear on the sealing compound that closes the pit gap and on the squeegee is significantly reduced. The sealant is automatically removed when the hanging edges are opened.
  • the device according to the invention is shown in the drawing and is described in more detail below.
  • a gravure forme cylinder 1 shown in Fig. 1 has a left 2 and right 3 pivotable, acute-angled hooking edge, the respective outer surface 5 is adapted to a curvature of a forme cylinder contour and thus continuously, in the tensioned state, the forme cylinder contour continuously.
  • These pivoting hanging edges 2, 3 run parallel to the cylinder axis and delimit a cylinder pit 7 to the side.
  • a bent end 4, 6 of a gravure printing plate 8 hung.
  • An opening angle alpha of the ends 4, 6 can be 45 °, but preferably less than 45 °, e.g. B. 35 °.
  • Legs 14, 16 each continue on the first legs 9, 11 and each form a second bevel 17, 18 with an opening angle Beta with the first legs 9, 11.
  • This opening angle beta can also be 45 °, but preferably less than 45 °, e.g. B. 35 °.
  • This second fold 17, 18 is directed towards the opposite end 6, 4 of the gravure plate 8.
  • the two ends 4, 6 and the two bevels 17, 18 have approximately the shape of a "Z".
  • An approximately trapezoidal cross section of the strip 21 is formed by a right and left side surface 22, 23 and a base surface 24.
  • the side surfaces 22, 23 enclose with the base surface 24 of the strip 21 an angle gamma which is approximately 0.5 ° to 5 ° smaller than the opening angle Beta, which the legs 9, 11 with the legs 14, 16 of the folded Form ends 4, 6 of gravure plate 8.
  • the side surfaces 22, 23 and the base surface 24 create corner edges 26, 27.
  • a distance a1 between the corner edges 26, 27 is the same or slightly longer than a distance a2 between the folds 17, 18 of the suspended gravure printing plate 8 when the hanging edges 2, 3 are closed.
  • the base surface 24 runs parallel to the base 19 of the cylinder pit 7 and in the closed state of the hanging edges 2, 3 the legs 14, 16 of the gravure printing plate 8 run parallel to the base surface 24.
  • rectangular guide pieces 31, 32 are fastened, which run in grooves 33, 34.
  • the groove 33 or 34 in the base 19 of the cylinder pit 7 is wider than the cuboid guide piece 31 or 32, so that the bar 21 in the direction of the hanging edges 2, 3, d. H. is movable in the direction of the fold 17, 18.
  • the guide pieces 31, 32 allow the bar 21 to move radially (FIG. 2).
  • This radial movement is limited, for example, by a cylinder-fixed bolt 36 which engages in an elongated hole 37 with the length of the path of the strip 21 in the radial direction.
  • Compression springs 38 which are supported in the base 19 of the cylinder pit 7 and on the base 24 of the strip 21, are arranged between the guide pieces 31, 32 (FIGS. 1 and 2).
  • the gravure plate is tensioned as follows:
  • the hanging edges 2, 3 are pivoted with the hooked-in, bent ends 4, 6 of the rotogravure plate 8 in the direction of the cylinder pit 7.
  • the legs 9, 11 of the folded ends 4, 6 of the gravure printing plate 8 are pressed against the side surfaces 22, 23 of the trapezoidal bar 21, whereby the bar 21 is moved against the compression springs 38 in the direction of the base 19 of the cylinder pit 7.
  • the legs 14, 16 of the intaglio printing plate 8 are guided under the base 24 of the trapezoidal bar 21 during this movement (FIGS. 3 and 4).
  • the intaglio printing plate 8 Shortly before the end of the pivoting movement of the hanging edges 2, 3 - ie before reaching the end position of the hanging edges 2, 3 - the bevels 17, 18 encompass the corner edges 26, 27 of the trapezoidal strip 21 near the pit Hook-in edges 2, 3 with the hooked-in, folded ends 4, 6 of the intaglio printing plate 8, these ends 4, 6 are pulled exactly onto the hook-in edges 2, 3.
  • the intaglio printing plate 8 also adapts exactly to the cylinder contour in the region of the hanging edges 2, 3 (FIG. 5).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Printing Plates And Materials Therefor (AREA)

Abstract

The printing plate (8) has edges bent into a Z-shape which hook over movable sharp edges (2,3) on either side of a groove in the printing cylinder (1). There is a trapezoid-section bar (21) which can engage the second bends on the ends of the Z-shaped ends of the printing plate. When the printing plate is fitted, cylinders to which the sharp edged (2,3) wedges are attached are rotated to bring these edges away from the centre of the big roller (1) and away from each other. After the first sharp bends in the plate are hooked over the edges, the edges are rotated toward each other to tension the plate. The trapezoid section bar is moved to trap the ends of the plate against the inside surfaces of the wedges. The wedges and small cylinders are shaped to present a smooth cylindrical outer surface when the ends of the printing plate are clamped.

Description

Die Erfindung betrifft eine Vorrichtung zum Befestigen und Spannen von Druckplatten mit "Z"-förmig abgekanteten Enden gemäß dem Oberbegriff des Anspruches 1.The invention relates to a device for fastening and tensioning printing plates with "Z" -shaped ends according to the preamble of claim 1.

Vorrichtungen zum Befestigen und Spannen von Druckplatten mit abgekanteten Enden für Rotationstiefdruckmaschinen sind allgemein bekannt.Devices for fastening and tensioning printing plates with folded ends for rotogravure printing machines are generally known.

Die EP 01 24 008 A2 beschreibt einen Formzylinder mit einer Einrichtung zum Aufspannen von biegsamen Druckplatten mit Spannmitteln für abgekantete Enden einer Druckplatte. Diese Spannmittel sind in einer Grube angeordnet und als dreieckförmige Segmentkörper mit einer Einhängekante ausgebildet, deren äußere Fläche im gespannten Zustand der Platte den Grubenspalt abdeckt und der Kontur des Formzylinders entspricht.EP 01 24 008 A2 describes a forme cylinder with a device for clamping flexible printing plates with clamping means for folded ends of a printing plate. These clamping devices are arranged in a pit and designed as a triangular segment body with a hanging edge, the outer surface of which covers the pit gap in the tensioned state of the plate and corresponds to the contour of the forme cylinder.

Es ist nicht gewährleistet, daß die Platte auch im Bereich der Einhängekante exakt auf der Zylinderperipherie aufliegt. Selbst kleinste Formabweichungen der Abkantung der Platte zur Einhängekante des Zylinders können, insbesondere bei metallischen Tiefdruckplatten, die besonders steif sind, nicht ausgeglichen werden.There is no guarantee that the plate will rest exactly on the periphery of the cylinder in the area of the hooking edge. Even the smallest deviations in shape of the edge of the plate from the hooking edge of the cylinder cannot be compensated for, in particular in the case of metallic gravure plates which are particularly stiff.

Aus der DE-PS 11 21 073 ist ein Druckplattenschloß bekannt, mit dem "Z"-förmig abgekantete Druckplatten befestigt und gespannt werden. Hierbei drücken zum Spannen Klemmbacken an abgekantete Schenkel der Druckplatte, wobei an der Zylinderperipherie zwischen der Druckplatte und den Klemmbacken ein Hohlraum entsteht.From DE-PS 11 21 073 a pressure plate lock is known with which "Z" -shaped pressure plates are attached and tensioned. In this case, clamping jaws press against bent limbs of the pressure plate, a cavity being formed on the cylinder periphery between the pressure plate and the clamping jaws.

Beide Vorrichtungen führen zu einer unzulässigen Vergrößerung des Bereiches, in dem Formabweichungen der Platte von der Zylinderkontur auftreten können, d. h. die Platte liegt auf dem Tiefdruckformzylinder hohl.Both devices lead to an impermissible enlargement of the area in which shape deviations of the plate from the cylinder contour can occur, i. H. the plate lies hollow on the gravure cylinder.

Insbesondere bei Tiefdruckverfahren werden steife Metalldruckplatten verwendet, bei denen die Formabweichungen besonders stark auftreten.Rigid metal printing plates, in which the shape deviations occur particularly strongly, are used in particular in gravure printing processes.

Diese Formabweichungen verursachen eine ungleichmäßige Auflage des Rakels, was zu Störungen des Farbauftrages (z. B. Farbspritzen) beim Tiefdruck führt.These deviations in shape cause the squeegee to lie unevenly, which leads to malfunctions in the ink application (e.g. ink spraying) during gravure printing.

Um eine möglichst störungsfreie Führung des Rakels zu erreichen, wurden Möglichkeiten geschaffen, um die normalerweise parallel zur Zylinderachse verlaufenden Kanten von Rakelschneide und Grubenspalt zu verschränken (z. B. Rakelschrägstellung). Dieser Verschränkung sind Grenzen dadurch gesetzt, daß sich bei starker Verschränkung der Anpreßdruck des Rakels an die Platte in axialer Richtung des Zylinders unzulässig stark ändert (auch wird durch ungleichmäßige Auflage der Verschleiß des Rakels unzulässig groß).In order to ensure that the squeegee is guided as smoothly as possible, options have been created to entangle the edges of the squeegee blade and pit gap, which normally run parallel to the cylinder axis (e.g. squeegee inclination). This entanglement is limited by the fact that the contact pressure of the squeegee against the plate occurs in the event of a strong entanglement changes to an unacceptable extent in the axial direction of the cylinder (the wear of the squeegee also becomes impermissibly large due to uneven support).

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zum Befestigen und Spannen von Druckplatten, insbesondere Tiefdruckplatten, mit "Z"-förmig abgekanteten Enden zu schaffen und hierbei die Form der Druckplatte im Bereich der Druckplattenenden exakt der Zylinderkontur anzupassen.The invention has for its object to provide a device for fastening and tensioning printing plates, in particular gravure printing plates, with "Z" -shaped ends and to adapt the shape of the printing plate in the area of the printing plate ends exactly to the cylinder contour.

Diese Aufgabe wird durch die Merkmale des kennzeichnenden Teils des Anspruches 1 gelöst.This object is achieved by the features of the characterizing part of claim 1.

Die mit der Erfindung erzielbaren Vorteile bestehen insbesondere darin, daß mit der erfindungsgemäßen Vorrichtung Formabweichungen einer Druckplatte von einer Formzylinderkontur im Bereich der Einhängekanten, d. h. hohlliegen der Druckplattenenden, minimiert werden. Durch die erfindungsgemäße Vorrichtung wird Farbspritzen beim Tiefdruckverfahren, das durch ungleichmäßige Anlage des Rakels an der Tiefdruckplatte entsteht, vermieden. Außerdem wird der Verschleiß sowohl an Dichtmasse, die den Grubenspalt verschließt, wie auch am Rakel deutlich verringert. Beim Öffnen der Einhängekanten wird die Dichtmasse selbsttätig entfernt.The advantages that can be achieved with the invention consist in particular in that with the device according to the invention, shape deviations of a printing plate from a forme cylinder contour in the region of the hanging edges, ie. H. hollow of the pressure plate ends can be minimized. The device according to the invention avoids ink splashing in the rotogravure printing process, which is caused by the doctor's non-uniform contact with the rotogravure plate. In addition, wear on the sealing compound that closes the pit gap and on the squeegee is significantly reduced. The sealant is automatically removed when the hanging edges are opened.

Die erfindungsgemäße Vorrichtung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben.The device according to the invention is shown in the drawing and is described in more detail below.

Es zeigen

Fig. 1
einen Radialschnitt der erfindungsgemäßen Vorrichtung mit geöffneten Spannelementen;
Fig. 2
einen Axialschnitt entsprechend Fig. 1;
Fig. 3
einen Radialschnitt der erfindungsgemäßen Vorrichtung mit teilgeschlossenen Spannelementen;
Fig. 4
einen Radialschnitt der erfindungsgemäßen Vorrichtung mit halbgeschlossenen Spannelementen;
Fig. 5
einen Radialschnitt der erfindungsgemäßen Vorrichtung mit geschlossenen Spannelementen.
Show it
Fig. 1
a radial section of the device according to the invention with open clamping elements;
Fig. 2
an axial section corresponding to FIG. 1;
Fig. 3
a radial section of the device according to the invention with partially closed clamping elements;
Fig. 4
a radial section of the device according to the invention with half-closed clamping elements;
Fig. 5
a radial section of the device according to the invention with closed clamping elements.

Ein in Fig. 1 dargestellter Tiefdruckformzylinder 1 weist eine linke 2 und rechte 3 schwenkbare, spitzwinklige Einhängekante auf, deren jeweilige äußere Fläche 5 an eine Krümmung einer Formzylinderkontur angepaßt ist und somit im Spannendzustand die Formzylinderkontur absatzlos, kontinuierlich fortsetzt. Diese schwenkbaren Einhängekanten 2, 3 verlaufen parallel zur Zylinderachse und begrenzen eine Zylindergrube 7 seitlich. In die Einhängekanten 2, 3 ist jeweils ein abgekantetes Ende 4, 6 einer Tiefdruckplatte 8 eingehängt. Ein Öffnungswinkel Alpha der Enden 4, 6 kann 45°, vorzugsweise jedoch kleiner 45°, z. B. 35°, betragen. Sich in das Innere einer Zylindergrube 7 erstreckende Schenkel 9, 11 der abgekanteten Enden 4, 6 schließen sich an jeweils eine Rundung 12, 13 an, in welche ein nicht abgekanteter Teil der Tiefdruckplatte 8 übergeht. An die ersten Schenkel 9, 11 setzen sich jeweils Schenkel 14, 16 fort, die mit den ersten Schenkeln 9, 11 jeweils eine zweite Abkantung 17, 18 mit einem Öffnungswinkel Beta bilden. Dieser Öffnungswinkel Beta kann ebenfalls 45°, vorzugsweise jedoch kleiner 45°, z. B. 35°, betragen. Diese zweite Abkantung 17, 18 ist dabei auf das gegenüberliegende Ende 6, 4 der Tiefdruckplatte 8 gerichtet. Bei einer planliegenden Tiefdruckplatte 8 haben die beiden Enden 4, 6 und die beiden Abkantungen 17, 18 annähernd die Form eines "Z".A gravure forme cylinder 1 shown in Fig. 1 has a left 2 and right 3 pivotable, acute-angled hooking edge, the respective outer surface 5 is adapted to a curvature of a forme cylinder contour and thus continuously, in the tensioned state, the forme cylinder contour continuously. These pivoting hanging edges 2, 3 run parallel to the cylinder axis and delimit a cylinder pit 7 to the side. In the hanging edges 2, 3 there is in each case a bent end 4, 6 of a gravure printing plate 8 hung. An opening angle alpha of the ends 4, 6 can be 45 °, but preferably less than 45 °, e.g. B. 35 °. Legs 9, 11 of the bent ends 4, 6, which extend into the interior of a cylinder pit 7, each follow a curve 12, 13, into which a non-bent part of the gravure printing plate 8 merges. Legs 14, 16 each continue on the first legs 9, 11 and each form a second bevel 17, 18 with an opening angle Beta with the first legs 9, 11. This opening angle beta can also be 45 °, but preferably less than 45 °, e.g. B. 35 °. This second fold 17, 18 is directed towards the opposite end 6, 4 of the gravure plate 8. In the case of a flat intaglio printing plate 8, the two ends 4, 6 and the two bevels 17, 18 have approximately the shape of a "Z".

Auf einem Grund 19 der Zylindergrube 7, die rechts und links von den Einhängekanten 2, 3 begrenzt wird, ist eine annähernd zylindergrubenlange Leiste 21 angeordnet.On a base 19 of the cylinder pit 7, which is delimited to the right and left by the hanging edges 2, 3, there is a bar 21 which is approximately the length of the cylinder pit.

Durch eine rechte und linke Seitenfläche 22, 23 und eine Grundfläche 24 wird ein annähernd trapezförmiger Querschnitt der Leiste 21 gebildet. Die Seitenflächen 22, 23 schließen mit der Grundfläche 24 der Leiste 21 jeweils einen Winkel Gamma ein, der ca. 0,5° bis 5° kleiner als der Öffnungswinkel Beta ist, den die Schenkel 9, 11 mit den Schenkeln 14, 16 der abgekanteten Enden 4, 6 der Tiefdruckplatte 8 bilden. Durch die Seitenflächen 22, 23 und die Grundfläche 24 entstehen Eckkanten 26, 27. Ein Abstand a1 der Eckkanten 26, 27 ist gleich oder geringfügig länger, als ein Abstand a2 der Abkantungen 17, 18 der eingehängten Tiefdruckplatte 8 bei geschlossenen Einhängekanten 2, 3. Die Grundfläche 24 verläuft parallel zum Grund 19 der Zylindergrube 7 und im geschlossenen Zustand der Einhängekanten 2, 3 verlaufen die Schenkel 14, 16 der Tiefdruckplatte 8 parallel zur Grundfläche 24.An approximately trapezoidal cross section of the strip 21 is formed by a right and left side surface 22, 23 and a base surface 24. The side surfaces 22, 23 enclose with the base surface 24 of the strip 21 an angle gamma which is approximately 0.5 ° to 5 ° smaller than the opening angle Beta, which the legs 9, 11 with the legs 14, 16 of the folded Form ends 4, 6 of gravure plate 8. The side surfaces 22, 23 and the base surface 24 create corner edges 26, 27. A distance a1 between the corner edges 26, 27 is the same or slightly longer than a distance a2 between the folds 17, 18 of the suspended gravure printing plate 8 when the hanging edges 2, 3 are closed. The base surface 24 runs parallel to the base 19 of the cylinder pit 7 and in the closed state of the hanging edges 2, 3 the legs 14, 16 of the gravure printing plate 8 run parallel to the base surface 24.

An beiden Enden 28, 29 dieser Leiste 21 sind quaderförmige Führungsstücke 31, 32 befestigt, die in Nuten 33, 34 verlaufen. Die Nut 33 bzw. 34 im Grund 19 der Zylindergrube 7 ist breiter als das quaderförmige Führungsstück 31 bzw. 32, so daß die Leiste 21 in Richtung der Einhängekanten 2, 3, d. h. in Richtung der Abkantung 17, 18 bewegbar ist. Entlang der Nut 33, 34 ermöglichen die Führungsstücke 31, 32 eine radiale Bewegung der Leiste 21 (Fig. 2).At both ends 28, 29 of this strip 21, rectangular guide pieces 31, 32 are fastened, which run in grooves 33, 34. The groove 33 or 34 in the base 19 of the cylinder pit 7 is wider than the cuboid guide piece 31 or 32, so that the bar 21 in the direction of the hanging edges 2, 3, d. H. is movable in the direction of the fold 17, 18. Along the groove 33, 34, the guide pieces 31, 32 allow the bar 21 to move radially (FIG. 2).

Diese radiale Bewegung wird von beispielsweise einem zylinderfesten Bolzen 36, der in ein Langloch 37 mit Länge des Weges der Leiste 21 in radialer Richtung eingreift, begrenzt. Zwischen den Führungsstücken 31, 32 sind unter der Leiste Druckfedern 38, die sich im Grund 19 der Zylindergrube 7 und an der Grundfläche 24 der Leiste 21 abstützen, angeordnet (Fig. 1 und Fig. 2).This radial movement is limited, for example, by a cylinder-fixed bolt 36 which engages in an elongated hole 37 with the length of the path of the strip 21 in the radial direction. Compression springs 38, which are supported in the base 19 of the cylinder pit 7 and on the base 24 of the strip 21, are arranged between the guide pieces 31, 32 (FIGS. 1 and 2).

Der Spannvorgang der Tiefdruckplatte läuft folgendermaßen ab:The gravure plate is tensioned as follows:

Um die Tiefdruckplatte 8 zu spannen, werden die Einhängekanten 2, 3 mit den eingehängten, abgekanteten Enden 4, 6 der Tiefdruckplatte 8 in Richtung der Zylindergrube 7 verschwenkt. Hierbei werden die Schenkel 9, 11 der abgekanteten Enden 4, 6 der Tiefdruckplatte 8 gegen die Seitenflächen 22, 23 der trapezförmigen Leiste 21 gedrückt, wodurch die Leiste 21 gegen die Druckfedern 38 in Richtung des Grundes 19 der Zylindergrube 7 bewegt wird. Die Schenkel 14, 16 der Tiefdruckplatte 8 werden während dieser Bewegung unter die Grundfläche 24 der trapezförmigen Leiste 21 geführt (Fig. 3 und Fig. 4).In order to tension the rotogravure plate 8, the hanging edges 2, 3 are pivoted with the hooked-in, bent ends 4, 6 of the rotogravure plate 8 in the direction of the cylinder pit 7. Here, the legs 9, 11 of the folded ends 4, 6 of the gravure printing plate 8 are pressed against the side surfaces 22, 23 of the trapezoidal bar 21, whereby the bar 21 is moved against the compression springs 38 in the direction of the base 19 of the cylinder pit 7. The legs 14, 16 of the intaglio printing plate 8 are guided under the base 24 of the trapezoidal bar 21 during this movement (FIGS. 3 and 4).

Kurz vor Abschluß der Schwenkbewegung der Einhängekanten 2, 3 - d. h. vor Erreichen der Endstellung der Einhängekanten 2, 3 - umfassen die Abkantungen 17, 18 die grubennahen Eckkanten 26, 27 der trapezförmigen Leiste 21. Durch den dadurch gebildeten Formschluß werden nun durch weiteres Verschwenken der Einhängekanten 2, 3 mit den eingehängten, abgekanteten Enden 4, 6 der Tiefdruckplatte 8 diese Enden 4, 6 exakt auf die Einhängekanten 2, 3 gezogen. Dadurch paßt sich die Tiefdruckplatte 8 auch im Bereich der Einhängekanten 2, 3 exakt der Zylinderkontur an (Fig. 5).Shortly before the end of the pivoting movement of the hanging edges 2, 3 - ie before reaching the end position of the hanging edges 2, 3 - the bevels 17, 18 encompass the corner edges 26, 27 of the trapezoidal strip 21 near the pit Hook-in edges 2, 3 with the hooked-in, folded ends 4, 6 of the intaglio printing plate 8, these ends 4, 6 are pulled exactly onto the hook-in edges 2, 3. As a result, the intaglio printing plate 8 also adapts exactly to the cylinder contour in the region of the hanging edges 2, 3 (FIG. 5).

TeilelisteParts list

11
TiefdruckformzylinderGravure form cylinder
22nd
Einhängekante, linke (schwenkbar)Hook-in edge, left (swiveling)
33rd
Einhängekante, rechte (schwenkbar)Hooking edge, right (swiveling)
44th
Ende, abgekantetesEnd, beveled
55
Fläche, äußere (2, 3)Surface, outer (2, 3)
66
Ende, abgekantetesEnd, beveled
77
ZylindergrubeCylinder pit
88th
TiefdruckplatteGravure plate
99
Schenkelleg
1010th
--
1111
Schenkelleg
1212th
RundungRounding
1313
RundungRounding
1414
Schenkelleg
1515
--
1616
Schenkelleg
1717th
AbkantungFolding
1818th
AbkantungFolding
1919th
Grund (7)Reason (7)
2020th
--
2121
Leiste, trapezförmigGroin, trapezoidal
2222
Seitenfläche, rechte (21)Right side (21)
2323
Seitenfläche, linke (21)Left side (21)
2424th
Grundfläche (21)Footprint (21)
2525th
--
2626
Eckkante, rechte (21)Right corner edge (21)
2727
Eckkante, linke (21)Corner edge, left (21)
2828
Ende, erstes (21)End, first (21)
2929
Ende, zweites (21)End, second (21)
3030th
--
3131
Führungsstück, erstes (21)Guide piece, first (21)
3232
Führungsstück, zweites (21)Guide piece, second (21)
3333
Nut, erste (19)Groove, first (19)
3434
Nut, zweite (19)Groove, second (19)
3535
--
3636
Bolzenbolt
3737
Langloch (28, 29)Slot (28, 29)
3838
DruckfederCompression spring
a1a1
Abstand der Eckkanten (26, 27) der Leiste (21)Distance between the corner edges (26, 27) of the bar (21)
a2a2
Abstand der Abkantung (17, 18)Bending distance (17, 18)
Alphaalpha
Öffnungswinkel (4, 6)Opening angle (4, 6)
Betabeta
Öffnungswinkel (17, 18)Opening angle (17, 18)
Gammagamma
Winkel (21)Angle (21)

Claims (4)

Vorrichtung zum Befestigen und Spannen von Tiefdruckplatten (8) mit "Z"-förmig abgekanteten Enden (4; 6) auf einem Tiefdruckformzylinder (1) dadurch gekennzeichnet, daß schwenkbare, an die "Z"-förmig abgekanteten Enden (4; 6) angepaßte Einhängekanten (2; 3), deren jeweilige äußere Flächen (5) eine Krümmung einer Zylinderkontur aufweisen, parallel zu der Tiefdruckzylinderachse verlaufend, eine Zylindergrube (8) begrenzend angeordnet sind, daß äußere Flächen (5) der schwenkbaren Einhängekanten (2; 3) im Spannendstellung die Zylinderkontur absatzlos, kontinuierlich fortsetzend vorgesehen sind, daß eine in radialer Richtung des Tiefdruckformzylinders (1) gefedert und in Richtung beider Einhängekanten (2; 3) bewegliche Leiste (21) mit trapezförmigen Querschnitt entlang der Zylindergrube (7) angeordnet ist, daß durch Seitenflächen (22; 23) und Grundfläche (24) gebildete Eckkanten (26; 27) der Leiste (21) in Abkantungen (17; 18) der Tiefdruckplatte (8) eingreifend angeordnet sind.Device for fastening and tensioning gravure plates (8) with "Z" -shaped ends (4; 6) on a gravure forme cylinder (1), characterized in that pivotable, adapted to the "Z" -shaped ends (4; 6) Hook-in edges (2; 3), the respective outer surfaces (5) of which have a curvature of a cylinder contour, running parallel to the gravure cylinder axis and delimiting a cylinder pit (8) such that outer surfaces (5) of the pivotable hook-in edges (2; 3) are arranged in In the tensioning position, the cylinder contour is provided continuously, continuously, in such a way that a bar (21) with a trapezoidal cross-section along the cylinder groove (7), which is sprung in the radial direction of the gravure forme cylinder (1) and is movable in the direction of both hooking edges (2; 3), is arranged in such a way that Side surfaces (22; 23) and base surface (24) formed corner edges (26; 27) of the bar (21) engaging in bends (17; 18) of the intaglio printing plate (8) et are. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß ein Winkel (Gamma) der Leiste (21), der von der Seitenfläche (22) bzw. (23) und der Grundfläche (24) gebildet wird, kleiner ist als ein Öffnungswinkel (Beta) der Abkantung (17) bzw. (18) der Tiefdruckplatte (8), den die Schenkel (9) und (14) bzw. (11) und (16) einschließen.Apparatus according to claim 1, characterized in that an angle (gamma) of the bar (21), which is formed by the side surface (22) or (23) and the base surface (24), is smaller than an opening angle (Beta) Bending (17) or (18) of the intaglio printing plate (8), which the legs (9) and (14) or (11) and (16) enclose. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß ein Abstand a1 der Eckkanten (26, 27) der Leiste (21) gleich oder geringfügig länger als der Abstand a2 der Abkantungen (17, 18) der eingehängten Tiefdruckplatte (8) bei geschlossenen Einhängekanten (2, 3) ist.Apparatus according to claim 1, characterized in that a distance a1 between the corner edges (26, 27) of the strip (21) is equal to or slightly longer than the distance a2 between the folds (17, 18) of the suspended gravure printing plate (8) when the hanging edges (2 , 3) is. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß an der Leiste (21) Führungsstücke (31, 32) angebracht sind, mit denen die Leiste (21) in Nuten (33, 34) im Grund (19) der Zylindergrube (7) radial bezüglich des Tiefdruckformzylinders (1) und in Richtung der Abkantungen (17, 18) bewegbar gelagert ist.Device according to claim 1, characterized in that on the bar (21) guide pieces (31, 32) are attached, with which the bar (21) in grooves (33, 34) in the base (19) of the cylinder pit (7) radially with respect of the gravure forme cylinder (1) and in the direction of the folds (17, 18) is movably mounted.
EP95108794A 1994-06-10 1995-06-08 Device for fastening and tensioning printing plates with Z-formed ends Expired - Lifetime EP0686504B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4420314 1994-06-10
DE4420314A DE4420314C2 (en) 1994-06-10 1994-06-10 Device for fastening and tensioning printing plates with "Z" -shaped ends

Publications (3)

Publication Number Publication Date
EP0686504A2 true EP0686504A2 (en) 1995-12-13
EP0686504A3 EP0686504A3 (en) 1996-12-18
EP0686504B1 EP0686504B1 (en) 1998-10-28

Family

ID=6520278

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95108794A Expired - Lifetime EP0686504B1 (en) 1994-06-10 1995-06-08 Device for fastening and tensioning printing plates with Z-formed ends

Country Status (4)

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US (1) US5566615A (en)
EP (1) EP0686504B1 (en)
JP (1) JP2736238B2 (en)
DE (2) DE4420314C2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1566269A1 (en) * 2004-02-23 2005-08-24 MAN Roland Druckmaschinen AG Cylinder for printing with a tensioning gap
WO2006136047A3 (en) * 2005-06-23 2007-03-15 Wifag Maschf Printing cylinder covering, combination of printing cylinder and printing cylinder covering, and printing cylinder comprising a covering stuck thereto

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19537420C1 (en) * 1995-10-07 1997-03-13 Koenig & Bauer Albert Ag Device for fastening and tensioning printing plates with bent ends
EP1591249A1 (en) * 2004-04-27 2005-11-02 Müller Martini Holding AG Apparatus for fixing a printing plate on a printing cylinder in a rotary press
CN100417521C (en) * 2005-02-23 2008-09-10 吴广顺 Inclined open technology of single sheet paper gravure machie printing plate rotary drum and flat sheet type gravure technology
CN111469545B (en) * 2020-05-29 2024-02-09 湖北科技学院 Mounting structure of printing roller and printing plate

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1121073B (en) 1955-03-02 1962-01-04 Fred K H Levey Company Inc Printing plate lock
EP0124008A2 (en) 1983-04-28 1984-11-07 BASF Aktiengesellschaft Printing plates tensioning device

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1927728A (en) * 1929-07-01 1933-09-19 Wolff Fritz Form cylinder for offset-printing machines
US1966311A (en) * 1931-06-11 1934-07-10 Pearson Surface decorating mechanism
US2745344A (en) * 1955-03-02 1956-05-15 Levey Fred K H Co Inc Flexible sheet securing device for printing rollers
DE2633445A1 (en) * 1976-07-24 1978-01-26 Frankenthal Ag Albert Photogravure cylinder plate clamp - has clamping spindle in cylinder groove and has sealing strip between clamped plate ends
US4250810A (en) * 1979-09-25 1981-02-17 International Business Machines Corporation Centrifugal clamp on a high speed print drum
DE3540581A1 (en) * 1985-11-15 1987-05-21 Roland Man Druckmasch PRINTING CYLINDER WITH A FILLING PIECE IN ITS CYLINDER PIT
US4833986A (en) * 1987-03-05 1989-05-30 M.A.N. Roland Druckmaschinen Ag Holding and tensioning system for a cover layer on a printing machine cylinder
DE3731779A1 (en) * 1987-09-22 1989-03-30 Koenig & Bauer Ag DEVICE FOR CLAMPING FLEXIBLE PRINTING PLATES ON FORM CYLINDERS OF ROTARY PRINTING MACHINES
DE3738568A1 (en) * 1987-11-13 1989-05-24 Basf Ag DEVICE FOR TENSIONING PRINTING PLATES
DE3928640A1 (en) * 1989-08-30 1991-03-14 Roland Man Druckmasch RUBBER BLANKET CYLINDERS FOR ARC ROTATION OFFSET PRINTING MACHINES
DE9017787U1 (en) * 1990-12-06 1992-01-02 Koenig & Bauer AG, 8700 Würzburg Axially adjustable register pin
DE4244077C2 (en) * 1992-12-24 1995-06-08 Koenig & Bauer Ag Device for clamping flexible printing plates on a forme cylinder of a rotary printing machine
DE9410423U1 (en) * 1993-05-25 1994-09-08 Koenig & Bauer AG, 97080 Würzburg printing plate

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1121073B (en) 1955-03-02 1962-01-04 Fred K H Levey Company Inc Printing plate lock
EP0124008A2 (en) 1983-04-28 1984-11-07 BASF Aktiengesellschaft Printing plates tensioning device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1566269A1 (en) * 2004-02-23 2005-08-24 MAN Roland Druckmaschinen AG Cylinder for printing with a tensioning gap
US7134394B2 (en) 2004-02-23 2006-11-14 Man Roland Druckmaschinen Ag Printing cylinder with clamping channel and rotatable spindle clamping mechanism
CN1660570B (en) * 2004-02-23 2011-06-15 曼罗兰公司 Printing cylinder with clamping channel
WO2006136047A3 (en) * 2005-06-23 2007-03-15 Wifag Maschf Printing cylinder covering, combination of printing cylinder and printing cylinder covering, and printing cylinder comprising a covering stuck thereto

Also Published As

Publication number Publication date
EP0686504A3 (en) 1996-12-18
DE4420314A1 (en) 1995-12-14
JP2736238B2 (en) 1998-04-02
EP0686504B1 (en) 1998-10-28
DE4420314C2 (en) 1999-02-04
US5566615A (en) 1996-10-22
JPH0839781A (en) 1996-02-13
DE59504036D1 (en) 1998-12-03

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