EP0557729B1 - Device for fixing a printing plate on a plate cylinder - Google Patents
Device for fixing a printing plate on a plate cylinder Download PDFInfo
- Publication number
- EP0557729B1 EP0557729B1 EP93101262A EP93101262A EP0557729B1 EP 0557729 B1 EP0557729 B1 EP 0557729B1 EP 93101262 A EP93101262 A EP 93101262A EP 93101262 A EP93101262 A EP 93101262A EP 0557729 B1 EP0557729 B1 EP 0557729B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder
- plate
- printing plate
- printing
- pressure plate
- 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
Links
- 239000013013 elastic material Substances 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims 2
- 238000012937 correction Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Images
Classifications
-
- 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
- B41F27/1262—Devices for attaching printing elements or formes to supports for attaching flexible printing formes without tensioning means
Definitions
- the invention relates to a device for clamping a flexible printing plate on a plate cylinder of a rotary printing press with a front clamping bar provided at the start of printing, which is adjustable at least in the circumferential direction of the cylinder and preferably also in the axial direction thereof, which can be detachably connected to the front edge of the printing plate and which is adjustably fastened in a cylinder pit which extends in the axial direction of the plate cylinder and is accessible from the outside, further with means also arranged in the cylinder pit, which can be detachably connected to the rear edge of the pressure plate, and with a tensioning device with spring means which hold the pressure plate clamps on the cylinder surface.
- the prior art has the disadvantage that when a register correction is carried out, the register error is only remedied locally, while it still exists at other points on the printing plate, because the printing plate has not shifted completely in conformity with the register correction.
- the known constructions take up a lot of space and also have a high weight, in particular due to the two tensioning strips. This weight is reflected in the imbalance in the operation of the machine, which in turn must be compensated for with suitable means.
- the invention avoids these disadvantages. It is based on the task of a device for clamping a flexible To propose a printing plate on a plate cylinder of a rotary printing press, with which register corrections can be carried out noticeably easier and with less problems than is the case with the prior art. Distortions or even damage to the printing plate or the printing plate image should be excluded.
- the invention is characterized in that a plurality of spring elements are attached in the cylinder pit spaced apart in the axial direction, which are releasably attachable to the rear edge of the pressure plate and spring in the circumferential direction and in the axial direction of the cylinder.
- the front tensioning bar can be adjusted accordingly, at least in the circumferential direction and preferably also in the axial direction or also in directions which thus enclose an angle, in short in the plane of the plate cylinder on it Start of printing. It should be mentioned that the adjustment on the front clamping bar in the circumferential direction also serves to clamp the pressure plate.
- a tensioning bar with a corresponding adjustment possibility is disclosed, for example, in the already mentioned EP 0 426 022, there in particular FIGS. 6 to 8 with the associated description.
- the spring elements There are numerous options for the design of the spring elements.
- a preferred possibility is to design the spring elements as pins which engage in corresponding holes on the rear edge of the pressure plate. This is particularly preferred because such pins in the required directions - in the plane of the rear end of the pressure plate - can be designed to be elastically resilient in a structurally simple manner and also the attachment of the pins to the pressure plate via the holes mentioned is structurally simple.
- the spring elements can, for example, also be clamped to the rear end of the pressure plate or be releasably attached in some other way.
- the attachment here is particularly simple if the pins have rear receptacles for the printing plate at their upper end.
- the pressure plate only has to be brought over the pins in a relaxed state in such a way that the pins pass through the holes and the pressure plate is then locked onto the pins by the pressure plate snapping into the receptacles of the pins.
- the required elasticity of the spring elements can be given to them in a structurally simple manner in that the spring elements are designed as pins, the feet of which are embedded in holders made of elastic material.
- the elastic material is, for example, a plastic of suitable elasticity or a suitable rubber material.
- Fig. 1 shows a section of the outer circumference of a plate cylinder 1 in a sectional side view, the actually cylindrical surface 2 of the plate cylinder being drawn for the sake of simplicity.
- a single cylinder pit 3 is formed on the plate cylinder, the left and right ends of which are shown in FIG. 1 for the sake of illustration.
- the cylinder rotates in the direction of arrow 4.
- the left end of Fig. 1 is therefore the start of printing.
- a pressure plate 5 is clamped on the surface of the cylinder. (For reasons of better illustration, a distance between the pressure plate 5 and the cylinder surface 2 is shown in FIG. 1.)
- the front end of the pressure plate 5 is clamped in a front clamping bar 6, which thus defines the start of printing.
- the clamping bar can be moved in the direction of arrow 7, whereby the pressure plate is tensioned.
- Corresponding measures, which are described in the aforementioned European patent application by the applicant you can adjust the tension bar not only in the direction of arrow 7 and in the opposite direction, but also in the axial direction of the pit 3 and you can also the tension bar in the plane of Tilt the pressure plate.
- the rear end of the printing plate is fixed to the printing cylinder in that a plurality of elastically resilient pins 8 are fastened in the cylinder pit and engage with their upper ends in corresponding holes 9 at the rear end of the printing plate 5.
- FIG. 3 shows that the pins have receptacles 10 at their rear ends, into which the rear edges of the holes 9 of the pressure plate 5 are inserted.
- Fig. 3 also shows that the foot of the pin 8 is cast into a holder 11 made of a suitable rubber-elastic material, so that the pin is movable in the manner of a ball joint, but with limited deflection, with its fastening end with the receptacle 10 all points one Can sweep the circular section surface. This is indicated in Fig. 2 by the arrows 12 perpendicular to each other.
- Fig. 3 also shows that the holder 11 is attached to a foot 13 which is screwed to the wall 15 of the pit 3 by means of a screw 14.
- a single foot can also be provided for all pins 8.
- the device described works as follows. First, the front end of the pressure plate 5 is clamped to the front and single clamping bar 6. Then you put the pressure plate 5 around the cylinder surface 2 and fastened its rear end in that the elastic pins 8 pass through the holes 9 of the pressure plate and are fastened there, as shown in FIG. 3. Then the clamping bar 6 is adjusted, if necessary, until the pressure plate is clamped in the register.
- the register can be corrected again by adjusting the tension bar 6 accordingly.
- the distance between the pins 8 should be a few centimeters, for example about 3 to 5 cm, in such a way that their elastic force affects practically the entire rear surface of the pressure plate 5.
- the holes 9 are larger than the cross sections of the pins 8 so that the pins can be easily threaded into the holes.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
Abstract
Description
Die Erfindung betrifft eine Vorrichtung zum Aufspannen einer biegsamen Druckplatte auf einen Plattenzylinder einer Rotations-Druckmaschine mit einer am Druckanfang vorgesehenen vorderen Spannleiste, die zumindest in Umfangsrichtung des Zylinders und vorzugsweise auch in dessen axialer Richtung verstellbar ist, die mit der Vorderkante der Druckplatte lösbar verbindbar ist und die in einer sich in axialer Richtung des Plattenzylinders erstreckenden und von außen zugänglichen Zylindergrube verstellbar befestigt ist, ferner mit ebenfalls in der Zylindergrube angeordneten Mitteln, die mit der hintern Kante der Druckplatte lösbar verbindbar sind, und mit einer Spanneinrichtung mit Federmitteln, die die Druckplatte auf der Zylinderoberfläche spannt.The invention relates to a device for clamping a flexible printing plate on a plate cylinder of a rotary printing press with a front clamping bar provided at the start of printing, which is adjustable at least in the circumferential direction of the cylinder and preferably also in the axial direction thereof, which can be detachably connected to the front edge of the printing plate and which is adjustably fastened in a cylinder pit which extends in the axial direction of the plate cylinder and is accessible from the outside, further with means also arranged in the cylinder pit, which can be detachably connected to the rear edge of the pressure plate, and with a tensioning device with spring means which hold the pressure plate clamps on the cylinder surface.
Derartige Vorrichtung sind in vielen Ausführungsformen bekannt geworden. Lediglich als Beispiel sei verwiesen auf die EP 0 232 730 A2, die EP 0 426 022 A2 der Anmelderin oder die DE 39 33 678 C2 der Anmelderin. Allen diesen bekannten Spannvorrichtungen ist es gemeinsam, daß die Druckplatte mit Hilfe einer vorderen und einer hinteren Spannleiste auf den Plattenzylinder aufgespannt wird. Wenigstens eine, vorzugsweise beide Spannleisten, sind zumindest in Umfangsrichtung verstellbar und auf sie wirken Federmittel ein, die die Druckplatte auf der Zylinderoberfläche spannen.Such devices have become known in many embodiments. For example only, reference is made to EP 0 232 730 A2, EP 0 426 022 A2 by the applicant or DE 39 33 678 C2 by the applicant. It is common to all these known clamping devices that the pressure plate is clamped onto the plate cylinder with the aid of a front and a rear clamping bar. At least one, preferably both clamping bars are adjustable at least in the circumferential direction and act on them by spring means which clamp the pressure plate on the cylinder surface.
Insbesondere die erwähnten Konstruktionen der Anmelderin haben sich zwar bewährt, jedoch haftet auch ihnen noch der Nachteil an, daß die Druckplatte mit verhältnismäßig großer Kraft auf dem Plattenzylinder aufgespannt wird. Dies beruht im wesentlichen darauf, daß beim Stand der Technik in der Regel die Federelemente sowohl an der vorderen wie auch an der hinteren Spannschiene oder Spannleiste angreifen. Hier ist zu berücksichtigen, daß insbesondere moderne Druckplatten aus verhältnismäßig dünnem Material, in der Regel Aluminium, bestehen, was nicht zu stark beansprucht werden darf, wenn es sich nicht unzulässig verformen oder gar reißen soll. Eine lokale Verstärkung der Druckplatten am Ort des Angriffs der Spannkräfte, d.h. an der vorderen und an der hinteren Kante der Druckplatte, schafft hier praktisch keine Abhilfe, weil die Fläche der Druckplatte immer noch dünn und daher empfindlich ist. Kurz gesagt, haftet dem Stand der Technik der Nachteil an, daß beim Durchführen einer Passerkorrektur der Passerfehler nur lokal beseitigt wird, während er an anderen Stellen der Druckplatte nach wie vor besteht, weil nämlich die Druckplatte sich bei der Passerkorrektur nicht vollständig abbildungskonform verschoben hat. Außerdem bestehen, ebenfalls hervorgerufen durch die verhältnismäßig hohen Zugkräfte, die an der Druckplatte angreifen, verhältnismäßig hohe Reibungskräfte zwischen der Druckplatte und der Zylinderoberfläche, so daß bei einer entsprechenden Passerkorrektur an einer der Spannleisten diese Korrektur sich nicht ohne weiteres über die gesamte Fläche der Druckplatte fortsetzt, wie dies bei einem starren und steifen Material an und für sich der Fall wäre. Schließlich ist als Nachteil zu erwähnen, daß die bekannten Konstruktionen viel Platz einnehmen und auch ein hohes Gewicht haben, insbesondere bedingt durch die beiden Spannleisten. Dieses Gewicht schlägt sich im Betrieb der Maschine in einer Unwucht nieder, die mit geeigneten Mitteln wiederum ausgeglichen werden muß.In particular, the constructions mentioned by the applicant have proven themselves, but they also have the disadvantage that the printing plate is clamped onto the plate cylinder with a relatively large force. This is essentially due to the fact that in the prior art the Engage spring elements on both the front and rear tensioning rails or tensioning strips. It should be taken into account here that in particular modern printing plates are made of relatively thin material, usually aluminum, which must not be overstressed if it is not to deform or tear inadmissibly. A local reinforcement of the pressure plates at the location of the attack of the clamping forces, ie on the front and on the rear edge of the pressure plate, practically does not remedy this, because the surface of the pressure plate is still thin and therefore sensitive. In short, the prior art has the disadvantage that when a register correction is carried out, the register error is only remedied locally, while it still exists at other points on the printing plate, because the printing plate has not shifted completely in conformity with the register correction. In addition, there are also relatively high frictional forces between the pressure plate and the cylinder surface, also caused by the relatively high tensile forces acting on the pressure plate, so that with a corresponding register correction on one of the tensioning strips, this correction does not easily continue over the entire area of the pressure plate , as would be the case with a rigid and rigid material. Finally, it should be mentioned as a disadvantage that the known constructions take up a lot of space and also have a high weight, in particular due to the two tensioning strips. This weight is reflected in the imbalance in the operation of the machine, which in turn must be compensated for with suitable means.
Die Erfindung vermeidet diese Nachteile. Ihr liegt die Aufgabe zugrunde, eine Vorrichtung zum Aufspannen einer biegsamen Druckplatte auf einen Plattenzylinder einer Rotations-Druckmaschine vorzuschlagen, mit der Passerkorrekturen fühlbar leichter und unproblematischer durchgeführt werden können als dies beim Stand der Technik der Fall ist. Dabei sollen Verzerrungen oder gar Beschädigungen der Druckplatte bzw. des Druckplattenbildes ausgeschlossen werden.The invention avoids these disadvantages. It is based on the task of a device for clamping a flexible To propose a printing plate on a plate cylinder of a rotary printing press, with which register corrections can be carried out noticeably easier and with less problems than is the case with the prior art. Distortions or even damage to the printing plate or the printing plate image should be excluded.
Zur Lösung dieser Aufgabe ist die Erfindung dadurch gekennzeichnet, daß in der Zylindergrube in axialer Richtung voneinander beabstandet mehrere Federelemente befestigt sind, die lösbar an der hinteren Kante der Druckplatte befestigbar sind und in Umfangsrichtung und in axialer Richtung des Zylinders federn.To achieve this object, the invention is characterized in that a plurality of spring elements are attached in the cylinder pit spaced apart in the axial direction, which are releasably attachable to the rear edge of the pressure plate and spring in the circumferential direction and in the axial direction of the cylinder.
Man behält somit erfindungsgemäß das Prinzip bei, das vordere Ende der Druckplatte am Druckanfang mit Hilfe der auch beim Stand der Technik vorhandenen Spannschiene einzuspannen. Am hinteren Ende der Druckplatte verzichtet man aber auf die dort beim Stand der Technik vorgesehene Spannschiene und sieht statt dessen die erwähnten Federelemente vor. Diese sorgen dafür, daß die Druckplatte gespannt bleibt und im Betrieb auch nicht flattert oder schlägt, wie es der Fall wäre, wenn auf entsprechende Federelemente oder Befestigungselemente vollständig verzichtet würde. Weil die Federlemente in Umfangsrichtung und in axialer Richtung federn, wird die Druckplatte mit Hilfe dieser Federelemente an ihrem hinteren Ende gewissermaßen glattgezogen. Hierbei ist es wichtig, daß dieses Glattziehen im Betrieb nach wenigen Umdrehungen des Plattenzylinders selbsttätig erfolgt, weil der Plattenzylinder mit aufgespannter Druckplatte an seinem Gegenzylinder abrollt, und zwar ausgehend von der vorderen und jetzt einzigen Druckleiste in Richtung nach hinten. Die Federelemente machen die hierbei ggfs. auftretenden Längenänderungen ohne weiteres mit und die Druckplatte wird somit gewissermaßen auf der Zylinderoberfläche glattgestrichen. All dies erfolgt, ohne daß auf die Druckplatte unzulässig hohe Kräfte dabei einwirken.The principle according to the invention is thus retained of clamping the front end of the printing plate at the beginning of printing with the aid of the tensioning rail also present in the prior art. At the rear end of the pressure plate, however, the tensioning rail provided there in the prior art is dispensed with and instead the spring elements mentioned are provided. These ensure that the pressure plate remains tensioned and does not flutter or strike during operation, as would be the case if the corresponding spring elements or fastening elements were completely dispensed with. Because the spring elements spring in the circumferential direction and in the axial direction, the pressure plate is, as it were, smoothed out at its rear end with the aid of these spring elements. It is important that this smoothing takes place automatically after a few revolutions of the plate cylinder during operation, because the plate cylinder rolls on its counter cylinder with the pressure plate clamped, starting from the front and now only pressure bar towards the rear. Make the spring elements any changes in length that may occur, and the printing plate is thus smoothed to a certain extent on the cylinder surface. All this takes place without impermissibly high forces acting on the printing plate.
Entsprechend kann man auch eine Passerkorrektur vornehmen, zu welchem Zweck die vordere Spannleiste entsprechend verstellbar ist, und zwar zumindest in Umfangsrichtung und vorzugsweise auch in axialer Richtung bzw. auch in Richtungen, die damit einen Winkel einschließen, kurz gesagt in der Ebene des Plattenzylinders an seinem Druckanfang. Es sei erwähnt, daß die Verstellung an der vorderen Spannleiste in Umfangsrichtung auch zum Spannen der Druckplatte dient. Eine Spannleiste mit entsprechender Verstellmöglichkeit ist beispielsweise offenbart in der schon erwähnten EP 0 426 022, dort insbesondere Fig. 6 bis 8 mit zugehöriger Beschreibung.Correspondingly, you can also make a register correction for what purpose the front tensioning bar can be adjusted accordingly, at least in the circumferential direction and preferably also in the axial direction or also in directions which thus enclose an angle, in short in the plane of the plate cylinder on it Start of printing. It should be mentioned that the adjustment on the front clamping bar in the circumferential direction also serves to clamp the pressure plate. A tensioning bar with a corresponding adjustment possibility is disclosed, for example, in the already mentioned EP 0 426 022, there in particular FIGS. 6 to 8 with the associated description.
Für die konstruktive Ausbildung der Federelemente gibt es zahlreiche Möglichkeiten. Eine bevorzugte Möglichkeit besteht darin, die Federlemente als Stifte auszubilden, die in entsprechende Löcher an der hinteren Kante der Druckplatte eingreifen. Dies wird insbesondere bevorzugt, weil derartige Stifte in den verlangten Richtungen - in der Ebene des hinteren Endes der Druckplatte - auf konstruktiv einfache Weise elastisch federnd ausgebildet sein können und auch die Befestigung der Stifte an der Druckplatte über die erwähnten Löcher ist konstruktiv einfach. Die Federlemente können aber beispielsweise auch mit dem hinteren Ende der Druckplatte verklemmt oder sonstwie lösbar befestigt werden.There are numerous options for the design of the spring elements. A preferred possibility is to design the spring elements as pins which engage in corresponding holes on the rear edge of the pressure plate. This is particularly preferred because such pins in the required directions - in the plane of the rear end of the pressure plate - can be designed to be elastically resilient in a structurally simple manner and also the attachment of the pins to the pressure plate via the holes mentioned is structurally simple. The spring elements can, for example, also be clamped to the rear end of the pressure plate or be releasably attached in some other way.
Die Befestigung wird hierbei besonders einfach, wenn die Stifte an ihrem oberen Ende rückwärtige Aufnahmen für die Druckplatte haben. Die Druckplatte muß - in entspanntem Zustand - nur so über die Stifte gebracht werden, daß die Stifte die Löcher durchgreifen und die Druckplatte wird dann an den Stiften arretiert, indem die Druckplatte in die Aufnahmen der Stifte einrastet.The attachment here is particularly simple if the pins have rear receptacles for the printing plate at their upper end. The pressure plate only has to be brought over the pins in a relaxed state in such a way that the pins pass through the holes and the pressure plate is then locked onto the pins by the pressure plate snapping into the receptacles of the pins.
Die verlangte Elastizität der Federelemente kann diesen in konstruktiv einfacher Weise dadurch mitgegeben werden, daß die Federelemente als Stifte ausgebildet sind, deren Füße in Halter aus elatischem Material eingebettet sind. Das elastische Material ist beispielsweise ein Kunststoff geeigneter Elastizität oder auch ein geeignetes Gummimaterial.The required elasticity of the spring elements can be given to them in a structurally simple manner in that the spring elements are designed as pins, the feet of which are embedded in holders made of elastic material. The elastic material is, for example, a plastic of suitable elasticity or a suitable rubber material.
Die Erfindung wird im folgenden anhand eines Ausführungsbeispieles näher erläutert, aus dem sich weitere wichtige Merkmale ergeben. Es zeigt:
- Fig. 1 -
- schematisch und in einer Seitenansicht als Abwicklung die wesentlichen Bauelemente einer erfindungsgemäßen Spannvorrichtung;
- Fig. 2 -
- ebenfalls schematisch eine Draufsicht auf Fig. 1;
- Fig. 3 -
- demgegenüber vergrößert eine Ansicht eines Federelements mit angedeuteter Druckplatte.
- Fig. 1 -
- schematically and in a side view as a settlement the essential components of a tensioning device according to the invention;
- Fig. 2 -
- likewise schematically a top view of FIG. 1;
- Fig. 3 -
- in contrast, an enlarged view of a spring element with the indicated pressure plate.
Fig. 1 zeigt einen Ausschnitt aus dem Außenumfang eines Plattenzylinders 1 in einer geschnittenen Seitenansicht, wobei die in Wirklichkeit zylindrische Oberfläche 2 des Plattenzylinders der Einfachheit halber aber gerade gezeichnet ist.Fig. 1 shows a section of the outer circumference of a
Am Plattenzylinder ist eine einzige Zylindergrube 3 ausgebildet, von der aus Gründen der Darstellung das linke bzw. das rechte Ende in Fig. 1 gezeigt sind.A
Der Zylinder dreht sich in Richtung des Pfeiles 4. Das linke Ende von Fig. 1 ist daher der Druckanfang.The cylinder rotates in the direction of
Eine Druckplatte 5 ist auf die Oberfläche des Zylinders aufgespannt. (Aus Gründen der besseren Darstellung ist in Fig. 1 ein Abstand zwischen der Druckplatte 5 und der Zylinderoberfläche 2 eingezeichnet.)A
Das vordere Ende der Druckplatte 5 ist in eine vordere Spannleiste 6 eingeklemmt, die also den Druckanfang festlegt. Die Spannleiste kann in Richtung des Pfeiles 7 verschoben werden, wodurch die Druckplatte gespannt wird. Zum Entspannen kann man die Spannleiste in Gegenrichtung dazu einstellbar verschieben. Entsprechend Maßnahmen, die in der erwähnten europäischen Offenlegungsschrift der Anmelderin beschrieben sind, kann man die Spannleiste im übrigen nicht nur in Pfeilrichtung 7 und in Gegenrichtung dazu einstellbar verschieben, sondern auch in axialer Richtung der Zylindergrube 3 und man kann die Spannleiste auch in der Ebene der Druckplatte verkanten.The front end of the
Die vorstehend erwähnten Maßnahmen sind bekannt.The measures mentioned above are known.
Erfindungsgemäß wird das hintere Ende der Druckplatte dadurch am Druckzylinder festgelegt, daß mehrere elastisch federnde Stifte 8 in der Zylindergrube befestigt sind, die mit ihren oberen Enden in entsprechende Löcher 9 am hinteren Ende der Druckplatte 5 eingreifen.According to the invention, the rear end of the printing plate is fixed to the printing cylinder in that a plurality of elastically
Dies ist im einzelnen in Fig. 3 gezeigt, woraus auch hervorgeht, daß die Stifte an ihren rückwärtigen Enden Aufnahmen 10 haben, in die sich die hinteren Kanten der Löcher 9 der Druckplatte 5 einlegen.This is shown in detail in FIG. 3, which also shows that the pins have
Fig. 3 zeigt auch, daß der Fuß des Stiftes 8 in einen Halter 11 aus geeignetem gummielastischen Material eingegossen ist, so daß der Stift nach Art eines Kugelgelenks, aber mit begrenztem Ausschlag, beweglich ist, wobei sein Befestigungsende mit der Aufnahme 10 alle Punkte einer Kreisausschnittsfläche bestreichen kann. Dies ist in Fig. 2 durch die aufeinander senkrecht stehenden Pfeile 12 angedeutet.Fig. 3 also shows that the foot of the
Fig. 3 zeigt auch, daß der Halter 11 an einem Fuß 13 befestigt ist, der mit Hilfe einer Schraube 14 an die Wand 15 der Grube 3 angeschraubt ist. Es kann auch ein einziger Fuß für alle Stifte 8 vorgesehen sein.Fig. 3 also shows that the
Die beschriebene Vorrichtung arbeitet wie folgt. Zunächst klemmt man das vordere Ende der Druckplatte 5 an der vorderen und einzigen Spannleiste 6 fest. Dann legt man die Druckplatte 5 um die Zylinderoberfläche 2 und befestigt ihr hinteres Ende dadurch, daß die elastischen Stifte 8 die Löcher 9 der Druckplatte durchgreifen und dort rastend befestigt werden, wie dies Fig. 3 zeigt. Anschließend wird die Spannleiste 6 ggfs. verstellt, bis die Druckplatte im Register aufgespannt ist.The device described works as follows. First, the front end of the
Jetzt setzt man die Druckmaschine in Gang und eine zeichnerisch nicht dargestellte Gegenwalze rollt auf der Zylinderoberfläche bzw. auf der Druckplatte in Richtung des Pfeiles 16 ab. Dadurch werden eventuell vorhandene Unebenheiten in der Oberfläche der Druckplatte gewissermaßen glatt gebügelt. Der einmal erreichte, glatte Zustand der Druckplatte bleibt erhalten, weil erfindungsgemäß an ihrem rückwärtigen Ende die Federstifte 8 angreifen.Now the printing machine is started and a counter roller, not shown in the drawing, rolls on the cylinder surface or on the printing plate in the direction of
Ggfs. kann der Passer nochmals durch entsprechende Verstellung der Spannleiste 6 korrigiert werden.If necessary. the register can be corrected again by adjusting the
Nach Fig. 1 stehen zwar Teile der Spannleiste 6 und der Stifte 8 über die Zylinderoberfläche 2 vor, jedoch in Wirklichkeit sind diese Bauteile nach unten in die Zylindergrube abgesenkt angeordnet, so daß die Bauteile beim Druck nicht stören. Hierzu ist die Druckplatte 5 mit einem Knick um die jeweilige Kante der Zylindergrube 3 herumgelegt, wie dies an sich bekannt ist.According to FIG. 1, parts of the
Der Abstand der Stifte 8 voneinander sollte einige Zentimeter betragen, beispielsweise etwa 3 bis 5 cm, derart, daß ihre elastische Kraft praktisch die gesamte hintere Fläche der Druckplatte 5 beeinflußt.The distance between the
Die Löcher 9 sind größer als die Querschnitte der Stifte 8, damit die Stifte leicht in die Löcher eingefädelt werden können.The
- 11
- PlattenzylinderPlate cylinder
- 22nd
- Oberflächesurface
- 33rd
- ZylindergrubeCylinder pit
- 44th
- Pfeilarrow
- 55
- Druckplatteprinting plate
- 66
- Spannleiste, vordereTensioning strip, front
- 77
- Pfeilarrow
- 88th
- Stiftpen
- 99
- Lochhole
- 1010th
- Aufnahmeadmission
- 1111
- Halterholder
- 1212th
- Pfeilarrow
- 1313
- Fußfoot
- 1414
- Schraubescrew
- 1515
- Wandwall
- 1616
- Pfeilarrow
Claims (4)
- Device for tensioning a flexible printing plate (5) on a plate cylinder (1) of a rotary printing press with a front tensioning rail (6) provided at the print start, which is adjustable at least in the peripheral direction (arrow 7) of the cylinder and preferably also in its axial direction, which is releasably connectable with the front edge of the printing plate (5) and which is fixed adjustably in a cylinder channel (3) extending in the axial direction of the plate cylinder and accessible from without, furthermore likewise with means (8) arranged in the cylinder channel (3) which can be releasably connected with the rear edge of the printing plate (5) and with a tensioning device with spring means which tensions the printing plate (5) on the cylinder surface (2) characterised in that in the cylinder channel (3), several spring elements (8) are fixed distanced in the axial direction from one another, which can be fixed releasably to the rear edge of the printing plate (5) and spring in the peripheral direction and in the axial direction (arrow 12) of the cylinder (1).
- Device according to Claim 1, characterised in that the spring elements are constructed as posts (8) which engage in corresponding holes (9) at the rear edge of the printing plate (5).
- Device according to Claim 2, characterised in that the posts (8) have at their upper ends rearwards seat (10) for the printing plate (5).
- Device according to one of Claims 1 to 3, characterised in that the spring elements (8) are constructed as posts, the feet of which are embedded in holders (11) of elastic material.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4205276A DE4205276A1 (en) | 1992-02-21 | 1992-02-21 | DEVICE FOR CLAMPING A PRINT PLATE ON A PLATE CYLINDER |
| DE4205276 | 1992-02-21 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0557729A1 EP0557729A1 (en) | 1993-09-01 |
| EP0557729B1 true EP0557729B1 (en) | 1995-06-28 |
Family
ID=6452241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP93101262A Expired - Lifetime EP0557729B1 (en) | 1992-02-21 | 1993-01-28 | Device for fixing a printing plate on a plate cylinder |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5361698A (en) |
| EP (1) | EP0557729B1 (en) |
| JP (1) | JPH0790634B2 (en) |
| AT (1) | ATE124328T1 (en) |
| DE (2) | DE4205276A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4210897C1 (en) * | 1992-04-02 | 1993-08-12 | Man Roland Druckmaschinen Ag, 6050 Offenbach, De | |
| JPH0720757U (en) * | 1993-09-06 | 1995-04-11 | 大日本スクリーン製造株式会社 | Sheet holding device for drum type scanning device |
| DE19610820C2 (en) * | 1996-03-19 | 2002-10-24 | Mitsubishi Paper Mills Ltd | Fastening device for a printing plate |
| DE19707063C1 (en) * | 1997-02-22 | 1998-07-30 | Roland Man Druckmasch | Method for performing page register corrections and corresponding device |
| DE10303178A1 (en) * | 2003-01-28 | 2004-07-29 | Heidelberger Druckmaschinen Ag | Back pressure plate for cardboard box fabrication, has hard anodized surface layer having sufficient thickness and hardness, with grooves formed at predetermined portions of the plate |
| JP4612899B2 (en) * | 2006-02-17 | 2011-01-12 | キヤノン株式会社 | Sheet conveying roller, sheet conveying apparatus, and image forming apparatus |
| US20080028964A1 (en) * | 2006-08-04 | 2008-02-07 | Mceachern David A | Mounting image carrying plate onto a cylinder |
| WO2017207006A1 (en) * | 2016-05-31 | 2017-12-07 | Glunz & Jensen | A pin system for easy mounting and disassembling printing plates |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL57261C (en) * | ||||
| DE7216860U (en) * | 1972-08-03 | Koenig & Bauer Ag | Clamping device for flexible printing plates | |
| DE426022C (en) * | 1925-03-01 | 1926-03-04 | Bruno Adler | Device for burning company and other information into wood and other material |
| US3025790A (en) * | 1956-04-30 | 1962-03-20 | Larsen Carl Ejner | Planographic printing method and apparatus |
| US3151554A (en) * | 1961-09-21 | 1964-10-06 | Fairchild Camera Instr Co | Perforated sheet supporting arrangement |
| US3188952A (en) * | 1962-05-08 | 1965-06-15 | Addressograph Multigraph | Holding and adjusting means for printing members |
| BE733564A (en) * | 1968-06-24 | 1969-11-03 | ||
| US4006686A (en) * | 1975-09-18 | 1977-02-08 | Ackerman Stephen P | Blanket fastening means for a cylinder blanket |
| SE393330B (en) * | 1975-10-03 | 1977-05-09 | Wifag Maschf | DEVICE FOR CLAMPING FLEXIBLE PRESSURE PLATES ON A SADDLE PLATE |
| DE2755885A1 (en) * | 1977-12-15 | 1979-06-21 | Koenig & Bauer Ag | DEVICE FOR FASTENING FLEXIBLE PRINTING PLATES ON THE FORMING CYLINDER OF A ROLLER ROTARY PRINTING MACHINE |
| DE3604209A1 (en) * | 1986-02-11 | 1987-08-13 | Heidelberger Druckmasch Ag | DEVICE FOR CLAMPING FLEXIBLE PRINTING PLATES ON THE PLATE CYLINDER OF ROTARY PRINTING MACHINES |
| DE3606351A1 (en) * | 1986-02-27 | 1987-09-03 | Heidelberger Druckmasch Ag | DEVICE FOR CLAMPING FLEXIBLE PRINTING PLATES ON THE PLATE CYLINDER OF ROTARY PRINTING MACHINES |
| IT1199685B (en) * | 1986-12-03 | 1988-12-30 | Ligure Tubettificio | CLIL HOLDER CYLINDRICAL CAP FOR LITHOGRAPHIC PRINTING MACHINES WITH REMOVABLE COVERS, PARTICULARLY FOR PRINTING ON CYLINDRICAL AND SIMILAR BODIES |
| DE3933678A1 (en) * | 1989-10-09 | 1991-04-18 | Miller Johannisberg Druckmasch | DEVICE FOR ACCURATELY POSITIONING A PRINT PLATE ON A PRINT CYLINDER |
| DE3936446A1 (en) * | 1989-11-02 | 1991-05-08 | Miller Johannisberg Druckmasch | PLATE CYLINDER OF A PRINTING MACHINE |
| US5088408A (en) * | 1991-02-28 | 1992-02-18 | Matthews International Inc. | Printing plate mounting system and a printing plate composite utilizing such system |
-
1992
- 1992-02-21 DE DE4205276A patent/DE4205276A1/en not_active Withdrawn
-
1993
- 1993-01-28 AT AT93101262T patent/ATE124328T1/en not_active IP Right Cessation
- 1993-01-28 DE DE59300294T patent/DE59300294D1/en not_active Expired - Fee Related
- 1993-01-28 EP EP93101262A patent/EP0557729B1/en not_active Expired - Lifetime
- 1993-02-19 JP JP5030369A patent/JPH0790634B2/en not_active Expired - Fee Related
- 1993-02-22 US US08/020,634 patent/US5361698A/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE59300294D1 (en) | 1995-08-03 |
| US5361698A (en) | 1994-11-08 |
| JPH068401A (en) | 1994-01-18 |
| JPH0790634B2 (en) | 1995-10-04 |
| ATE124328T1 (en) | 1995-07-15 |
| EP0557729A1 (en) | 1993-09-01 |
| DE4205276A1 (en) | 1993-08-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE60103138T2 (en) | BENDING IMAGE TRANSFER GUMMITCH WITH UNDEETABLE CARRIER | |
| DE2654255A1 (en) | CLAMPING DEVICE FOR PRESSURE PLATES | |
| DE3441175C2 (en) | Blanket cylinder for an offset printing machine | |
| DE3516682C2 (en) | ||
| DE1954073A1 (en) | Sheet-processing double-sided printing machine with cutting device, adjustable to different sizes | |
| EP0557729B1 (en) | Device for fixing a printing plate on a plate cylinder | |
| DE2516160A1 (en) | WEB SHAFT WITH SLIDING FASTENING ELEMENT ON THE SHAFT | |
| EP0553462A1 (en) | Support connection between two rolls | |
| DE3125434A1 (en) | DEVICE FOR SUPPLYING COLOR TO THE PRINT PLATE OF A PRINTING MACHINE | |
| DE4241588A1 (en) | Page register system for printing forms | |
| DE3109859C2 (en) | Blanket tensioning device | |
| EP0429808B1 (en) | Device for precisely registering and tensioning a printing plate upon an impression cylinder | |
| DE4110309C2 (en) | Arrangement of a textile elevator on transfer drums of printing machines | |
| DE60306057T2 (en) | Arrangement with a rubber blanket and a blanket cylinder; Cylinder, blanket and printing machine | |
| CH687070A5 (en) | Blanket tension. | |
| DE102004042342B4 (en) | Clamping device for a clamping channel of a cylinder body, printing forme cylinder and method of manufacture | |
| EP0119570A2 (en) | Former for the folding device of a rotary web printing machine | |
| DE3114580A1 (en) | Device for the uneven attachment of the blanket to the cylinder of an offset printing machine | |
| DE10341229B4 (en) | guide roll | |
| DE8523268U1 (en) | Board, especially demonstration board | |
| EP0170251B1 (en) | Folding machine | |
| DE3521590C1 (en) | Sheet smoothing device for the gripper edge of a sheet on the sheet system of a sheet-fed rotary printing machine | |
| DE19610820C2 (en) | Fastening device for a printing plate | |
| DD290624B3 (en) | DEVICE FOR FIXING A BENDING PRESSURE PLATE | |
| EP1960593A1 (en) | Strip for flexibly supporting a wire and twin-wire section |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 19930218 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL PT SE |
|
| 17Q | First examination report despatched |
Effective date: 19941213 |
|
| ITF | It: translation for a ep patent filed | ||
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DE DK ES FR GB GR IT LI LU NL PT SE |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 19950628 Ref country code: ES Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY Effective date: 19950628 Ref country code: DK Effective date: 19950628 |
|
| REF | Corresponds to: |
Ref document number: 124328 Country of ref document: AT Date of ref document: 19950715 Kind code of ref document: T |
|
| ET | Fr: translation filed | ||
| REF | Corresponds to: |
Ref document number: 59300294 Country of ref document: DE Date of ref document: 19950803 |
|
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 19950712 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PT Effective date: 19950928 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19960131 |
|
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed | ||
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20001212 Year of fee payment: 9 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 20001214 Year of fee payment: 9 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 20001222 Year of fee payment: 9 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20001227 Year of fee payment: 9 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 20010118 Year of fee payment: 9 |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: IF02 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020128 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020129 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020131 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020131 Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020131 |
|
| BERE | Be: lapsed |
Owner name: MAN ROLAND DRUCKMASCHINEN A.G. Effective date: 20020131 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20020801 |
|
| EUG | Se: european patent has lapsed |
Ref document number: 93101262.9 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20020128 |
|
| NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 20020801 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: AT Payment date: 20030102 Year of fee payment: 11 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20030110 Year of fee payment: 11 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20040128 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20040930 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED. Effective date: 20050128 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20070110 Year of fee payment: 15 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20080801 |