EP0429808B1 - Device for precisely registering and tensioning a printing plate upon an impression cylinder - Google Patents
Device for precisely registering and tensioning a printing plate upon an impression cylinder Download PDFInfo
- Publication number
- EP0429808B1 EP0429808B1 EP90119357A EP90119357A EP0429808B1 EP 0429808 B1 EP0429808 B1 EP 0429808B1 EP 90119357 A EP90119357 A EP 90119357A EP 90119357 A EP90119357 A EP 90119357A EP 0429808 B1 EP0429808 B1 EP 0429808B1
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- European Patent Office
- Prior art keywords
- cylinder
- tensioning
- printing
- printing plate
- tensioning rail
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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
- B41F27/1218—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices
- B41F27/1225—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices moving in the printing plate end substantially rectilinearly
- B41F27/1231—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices moving in the printing plate end substantially rectilinearly by translatory motion substantially tangential to support surface
Definitions
- the invention relates to a device for precise positioning of a printing plate on a printing cylinder of a printing unit, wherein a pit extending in the axial direction of the cylinder is provided on the circumference of the printing cylinder for receiving clamping and fastening means for the printing plate, which is a front clamping rail for the start of printing the pressure plate and a in the direction of rotation of the printing cylinder located in front of the front clamping rail, rear clamping rail for the printing end of the printing plate, means for releasably attaching the ends of the printing plate to the two clamping rails are provided, furthermore means for adjusting the rear clamping rail in the circumferential direction of the Printing cylinders are provided over a larger clamping path for the purpose of clamping the printing plate on the cylinder circumference and means for adjusting the front clamping rail in the circumferential direction of the printing cylinder via a smaller adjustment path for adjusting the print image in d he machine are provided and the adjustment means for adjusting the pressure plate work together with a cylinder-
- a first example is known from document DE-B-1786317.
- DE-OS 38 43 395 Another example is DE-OS 38 43 395. It is common to this prior art that the stop defining the zero position of the front tensioning rail is the front pit wall.
- Modern printing plates are made of a material that must not be stretched too much if it is not to lengthen excessively.
- the operator therefore adjusts the front tensioning rail a certain distance from the zero position defined by the front pit wall and then tries several times until the correct zero position is found by correctly adjusting all tensioning screws of the front tensioning rail. It is obvious that this is not only labor-intensive, but in particular it is disadvantageous that the result does not always correspond to the desired result despite the large amount of work involved, especially since the zero position defined by the front pit wall had to be left and the The position of the front tensioning rail relative to the tensioning screws had to be changed several times, and this usually applies to all tensioning screws of the front tensioning rail.
- the invention avoids these disadvantages. It is based on the object of proposing a device with the features mentioned at the outset, with which the zero position of the printing plate on the printing cylinder which defines the printed image can be achieved reproducibly and correctly in a few simple steps.
- the invention is characterized in that the cylinder-fixed stop forming the zero position of the front tensioning rail is arranged on the side of the front tensioning rail facing the rear tensioning rail and in that spring means are provided which press the front tensioning rail against the stop.
- the position of the front tensioning rail defining the start of printing (zero position) is thus defined by this, on the side facing away from the front pit wall, a cylinder-fixed stop.
- the zero position defined in this way is safely reached with the aid of the spring means, which press the front tensioning rail against the cylinder-fixed stop in the defined zero position.
- front pit wall cited above is the pit wall that is adjacent to the front tensioning rail. Seen in the direction of rotation of the printing cylinder, this is the rear pit wall.
- the cylinder-fixed stop will be set correctly once and for all, and care must then be taken to ensure that the setting once found can no longer be easily shifted. It is therefore preferred if the cylinder-fixed stop is adjustable and can be blocked in the position once set.
- a practical embodiment of this is characterized in that a stop screw is screwed into a threaded bore of a bar fixed in the cylinder in the pit, on the circumference of which a locking screw rests.
- the tip of the stop screw thus forms the cylinder-fixed stop and the location of the stop once found (the tip of the stop screw) is blocked by a corresponding screwing in of the locking screw. This once found and blocked position can also be locked by suitable means.
- stop and the spring are aligned coaxially with one another. There are then no forces acting on the front tensioning rail via the spring, which seek to tilt the tensioning rail.
- An important embodiment is characterized in that at least one adjusting screw is provided, by means of which the distance between the front tensioning rail and the stop can be adjusted.
- at least one adjusting screw is provided, by means of which the distance between the front tensioning rail and the stop can be adjusted.
- two such set screws are provided for the front clamping rail of a cylinder, one at the front and one at the rear end of the clamping rail.
- the actuation is further simplified if a device is provided via which all the adjusting screws of the cylinder can be actuated together. If, for example, two set screws are provided, they can be connected to one another via a rod, so that they can only be adjusted together. The set screws can also be adjusted using a common hand lever or each set screw is provided with such a hand lever.
- the adjusting screws While in the prior art clamping screws are clamped in the front clamping bar, the adjusting screws provided in the present invention do not have the task of clamping the pressure plate. They are only intended to ensure that after the front tensioning rail with the attached pressure plate is hooked into the cylinder pit, it is at a distance from the cylinder-fixed stop. Then the set screws are loosened and the springs press the clamping bar against the cylinder-fixed stop and the desired zero position is then immediately adopted.
- a schematic front view shows a section of a pressure cylinder 1 which rotates in the direction of arrow 2.
- a cylinder pit 3 extends in the axial direction of the cylinder.
- a front clamping bar 4 and a rear clamping bar 5 are accommodated in this.
- the ends of a pressure plate 7 are detachably connected to the tensioning strips 4, 5 by means of suitable pins 6. The pins engage in corresponding holes in the end areas of the pressure plate.
- Both clamping strips 4, 5 are in the circumferential direction, i.e. adjustable in the direction of the double arrow 8 to a certain extent, the rear tensioning bar can generally be adjusted by a larger span of a few millimeters and the front tensioning bar 4 by a smaller adjustment path of a few tenths of a millimeter. Both clamping bars 4,5 are held in the pit on suitable guides, which are not shown in the drawing.
- Fig. 2 shows details of the inventive design of the front clamping bar 4 with associated components with which the zero position of the pressure plate 7 can be defined.
- a bar 9 is fastened to the bottom of the cylinder pit 3, which is arranged on the side of the tensioning bar 4 facing away from the front pit wall 10.
- a plurality of stop screws 11 are also screwed into the bar 9 at a distance from one another. See also Fig. 3, in which the stop screws are only indicated schematically.
- the tips 12 of the screws 11 thus form a cylinder-fixed stop for the front clamping bar 4.
- springs 13 These need not be designed as coil springs, as shown in the drawing, but other spring means are also possible.
- set screws 14 are inserted into through holes in the clamping strips 4, the tips of which are screwed into threaded bores 15 of the cylinder.
- the defined zero position of the front tensioning bar and with it also the pressure start of the Pressure plate 7 can be approached.
- the set screws 14 are actuated so that they release the clamping bar 4 so that the springs 13 can move the clamping bar in the direction of the arrow 17 in FIG. 2 and bring it into contact with the screws 11.
- the defined and once found zero position is now taken without any further activities.
- Fig. 3 shows that you can get by for each clamping bar with two of the adjusting screws 14, which can also be operated together via a suitable device, not shown in the drawing.
- the spring means 13 are expediently received in a suitable receptacle 19 of the tensioning rail or tensioning bar 4.
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- Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
- Exposure And Positioning Against Photoresist Photosensitive Materials (AREA)
Abstract
Description
Die Erfindung betrifft eine Vorrichtung zum positionsgenauen Spannen einer Druckplatte auf einem Druckzylinder eines Druckwerks, wobei am Umfang des Druckzylinders eine sich in axialer Richtung des Zylinders erstreckende Grube zur Aufnahme von Spann- und Befestigungsmitteln für die Druckplatte vorgesehen ist, die eine vordere Spannschiene für den Druckanfang der Druckplatte und eine in Drehrichtung des Druckzylinders vor der vorderen Spannschiene befindliche, hintere Spannschiene für das Druckende der Druckplatte aufweisen, wobei Mittel zum lösbaren Befestigen der Enden der Druckplatte an den beiden Spannschienen vorgesehen sind, wobei ferner Mittel zum Verstellen der hinteren Spannschiene in Umfangsrichtung des Druckzylinders über einen größeren Spannweg zwecks Spannen der Druckplatte auf dem Zylinderumfang vorgesehen sind und Mittel zum Verstellen der vorderen Spannschiene in Umfangsrichtung des Druckzylinders über einen kleineren Justierweg zum Justieren des Druckbildes in der Maschine vorgesehen sind und wobei die Verstellmittel zum Justieren der Druckplatte mit einem zylinderfesten Anschlag als Nullage zusammenarbeiten.The invention relates to a device for precise positioning of a printing plate on a printing cylinder of a printing unit, wherein a pit extending in the axial direction of the cylinder is provided on the circumference of the printing cylinder for receiving clamping and fastening means for the printing plate, which is a front clamping rail for the start of printing the pressure plate and a in the direction of rotation of the printing cylinder located in front of the front clamping rail, rear clamping rail for the printing end of the printing plate, means for releasably attaching the ends of the printing plate to the two clamping rails are provided, furthermore means for adjusting the rear clamping rail in the circumferential direction of the Printing cylinders are provided over a larger clamping path for the purpose of clamping the printing plate on the cylinder circumference and means for adjusting the front clamping rail in the circumferential direction of the printing cylinder via a smaller adjustment path for adjusting the print image in d he machine are provided and the adjustment means for adjusting the pressure plate work together with a cylinder-fixed stop as zero position.
Derartige Vorrichtungen sind in vielen Ausführungsformen bekannt geworden. Ein erstes Beispiel ist aus Dokument DE-B-1786317 bekannt. Dort ist eine Vorrichtung zum Befestigen und Justieren von Druckplatten an Plattenzylindern von Druckmaschinen erwähnt, in der nach dem Einführen und Befestigen einer neuen Druckplatte in die Spannleisten sofort eine richtige Justierung gegeben ist, so daß ein neues Einrichten der Druckplatte bzw. der Spannleiste und neue Probedrucke entfallen. Als weiteres Beispiel sei auf die DE-OS 38 43 395 verwiesen. Diesem Stand der Technik ist es gemeinsam, daß der die Nullage der vorderen Spannschiene definierende Anschlag die vordere Grubenwand ist. In die vordere Spannschiene sind beabstandet voneinander und über deren Länge verteilt mehrere Spannschrauben eingeschraubt, die von Hand so eingestellt werden müssen, daß die Nullage des Druckzylinders in die gewünschte Position kommt, wie diese für den gesamten Maschinenlauf benötigt wird. Diese Einstellung der Nullage ist aber problematisch. Man kann nämlich nicht die vordere Grubenwand als solche als Nullage nehmen, weil dann in aller Regel kleinere Wölbungen der Druckplatte über dem Umfang des Druckzylinders verbleiben, insbesondere am Anfang der Druckplatte. Diese Wölbungen können auch durch ein Nachspannen am hinteren Ende der Druckplatte nicht ausgeglichen werden, weil hierzu die Reibung über die gesamte Druckplatte, die ja schon am Umfang des Druckzylinders anliegt, zu groß ist. Moderne Druckplatten bestehen aus einem Material, welches nicht zu stark gespannt werden darf, wenn es sich nicht unzulässig längen soll. Die Bedienungsperson verstellt daher die vordere Spannschiene ausgehend von der durch die vordere Grubenwand definierten Nullage um einen gewissen Weg nach hinten und probiert dann mehrmals, bis durch ein richtiges Einstellen aller Spannschrauben der vorderen Spannschiene die richtige Nullage gefunden ist. Es liegt auf der Hand, daß dies nicht nur arbeitsaufwendig ist, sondern insbesondere ist es nachteilig, daß das Resultat trotz des großen Arbeitsaufwandes nicht immer dem gewünschten Ergebnis entspricht, vor allem weil ja die durch die vordere Grubenwand definierte Nullage hierbei verlassen werden mußte und die Lage der vorderen Spannschiene relativ zu den Spannschrauben mehrmals geändert werden mußte, und dies in der Regel bei allen Spannschrauben der vorderen Spannschiene. Als Ergebnis ist festzuhalten, daß das Justieren der Druckplatte am Druckzylinder beim Stand der Technik nicht nur arbeitsaufwendig ist, sondern die gewünschte Nulljustierung wird trotz des großen Arbeitsaufwandes nicht immer ausreichend sicher erreicht mit der Folge von Makulatur und erneutem Arbeitsaufwand zur Nachjustierung.Such devices have become known in many embodiments. A first example is known from document DE-B-1786317. There is a device for attaching and adjusting printing plates on plate cylinders of printing presses mentioned, in which a correct adjustment is immediately given after inserting and attaching a new printing plate in the clamping bars, so that a new setup of the printing plate or the clamping bar and new test prints omitted. Another example is DE-OS 38 43 395. It is common to this prior art that the stop defining the zero position of the front tensioning rail is the front pit wall. Several clamping screws are screwed into the front clamping rail at a distance from one another and distributed over their length, which must be set by hand so that the zero position of the printing cylinder comes into the desired position, as is required for the entire machine run. However, this setting of the zero position is problematic. It is not possible to take the front pit wall as such as the zero position, because then generally smaller curvatures of the printing plate remain over the circumference of the printing cylinder, especially at the beginning of the printing plate. These curvatures can also not be compensated for by re-tensioning at the rear end of the printing plate, because the friction over the entire printing plate, which already lies on the circumference of the printing cylinder, is too great for this. Modern printing plates are made of a material that must not be stretched too much if it is not to lengthen excessively. The operator therefore adjusts the front tensioning rail a certain distance from the zero position defined by the front pit wall and then tries several times until the correct zero position is found by correctly adjusting all tensioning screws of the front tensioning rail. It is obvious that this is not only labor-intensive, but in particular it is disadvantageous that the result does not always correspond to the desired result despite the large amount of work involved, especially since the zero position defined by the front pit wall had to be left and the The position of the front tensioning rail relative to the tensioning screws had to be changed several times, and this usually applies to all tensioning screws of the front tensioning rail. As a result, it should be noted that the adjustment of the printing plate on the printing cylinder in the prior art is not only labor-intensive, but the desired zero adjustment is made despite of the large amount of work not always achieved with sufficient certainty with the consequence of waste and renewed work for readjustment.
Die Erfindung vermeidet diese Nachteile. Ihr liegt die Aufgabe zugrunde, eine Vorrichtung mit den eingangs genannten Merkmalen vorzuschlagen, mit der die das Druckbild definierende Nullage der Druckplatte am Druckzylinder mit wenigen Handgriffen, reproduzierbar und richtig erreicht werden kann.The invention avoids these disadvantages. It is based on the object of proposing a device with the features mentioned at the outset, with which the zero position of the printing plate on the printing cylinder which defines the printed image can be achieved reproducibly and correctly in a few simple steps.
Zur Lösung dieser Aufgabe ist die Erfindung dadurch gekennzeichnet, daß der die Nullage der vorderen Spannschiene ausbildende, zylinderfeste Anschlag an der zur hinteren Spannschiene weisenden Seite der vorderen Spannschiene angeordnet ist und daß Federmittel vorgesehen sind, die die vordere Spannschiene an den Anschlag andrücken.To achieve this object, the invention is characterized in that the cylinder-fixed stop forming the zero position of the front tensioning rail is arranged on the side of the front tensioning rail facing the rear tensioning rail and in that spring means are provided which press the front tensioning rail against the stop.
Die Lage der den Druckanfang (Nullposition) definierenden vorderen Spannschiene wird somit durch diesen, an der von der vorderen Grubenwand abgewandten Seite befindlichen, zylinderfesten Anschlag definiert. Die hierdurch definierte Nullposition wird mit Hilfe der Federmittel sicher erreicht, die die vordere Spannschiene an den zylinderfesten Anschlag in die definierte Nullage andrücken.The position of the front tensioning rail defining the start of printing (zero position) is thus defined by this, on the side facing away from the front pit wall, a cylinder-fixed stop. The zero position defined in this way is safely reached with the aid of the spring means, which press the front tensioning rail against the cylinder-fixed stop in the defined zero position.
Es sei erwähnt, daß die vorstehend zitierte vordere Grubenwand diejenige Grubenwand ist, die sich benachbart der vorderen Spannschiene befindet. In Drehrichtung des Druckzylinders gesehen ist dies die rückwärtige Grubenwand.It should be noted that the front pit wall cited above is the pit wall that is adjacent to the front tensioning rail. Seen in the direction of rotation of the printing cylinder, this is the rear pit wall.
Für einen bestimmten Druckzylinder wird man den zylinderfesten Anschlag ein für alle Mal richtig einstellen, wobei dann dafür gesorgt werden muß, daß die einmal gefundene Einstellung nicht ohne weiteres mehr verschoben werden kann. Es wird daher bevorzugt, wenn der zylinderfesten Anschlag verstellbar ist und in der einmal eingestellten Lage blockiert werden kann.For a certain pressure cylinder, the cylinder-fixed stop will be set correctly once and for all, and care must then be taken to ensure that the setting once found can no longer be easily shifted. It is therefore preferred if the cylinder-fixed stop is adjustable and can be blocked in the position once set.
Eine praktische Ausführungsform hierfür ist dadurch gekennzeichnet, daß in eine Gewindebohrung einer zylinderfest in der Grube angeordneten Leiste eine Anschlagschraube eingedreht ist, an deren Umfang eine Blockierschraube anliegt. Die Spitze der Anschlagschraube bildet somit den zylinderfesten Anschlag und der einmal gefundene Ort des Anschlags (der Spitze der Anschlagschraube) wird durch ein entsprechendes Eindrehen der Blockierschraube blockiert. Diese einmal gefundene und blockierte Stellung kann zusätzlich durch geeignete Mittel verriegelt werden.A practical embodiment of this is characterized in that a stop screw is screwed into a threaded bore of a bar fixed in the cylinder in the pit, on the circumference of which a locking screw rests. The tip of the stop screw thus forms the cylinder-fixed stop and the location of the stop once found (the tip of the stop screw) is blocked by a corresponding screwing in of the locking screw. This once found and blocked position can also be locked by suitable means.
Bevorzugt wird es, wenn der Anschlag und die Feder koaxial zueinander ausgerichtet sind. Es greifen dann an der vorderen Spannschiene über die Feder keine Kräfte an, die die Spannschiene zu verkanten suchen.It is preferred if the stop and the spring are aligned coaxially with one another. There are then no forces acting on the front tensioning rail via the spring, which seek to tilt the tensioning rail.
Eine wichtige Ausgestaltung ist dadurch gekennzeichnet, daß wenigstens eine Stellschraube vorgesehen ist, über die der Abstand zwischen der vorderen Spannschiene und dem Anschlag einstellbar ist. Im allgemeinen wird es genügen, wenn für die vordere Spannschiene eines Zylinders zwei derartige Stellschrauben vorgesehen sind, und zwar eine am vorderen und eine am hinteren Ende der Spannschiene.An important embodiment is characterized in that at least one adjusting screw is provided, by means of which the distance between the front tensioning rail and the stop can be adjusted. In general, it will suffice if two such set screws are provided for the front clamping rail of a cylinder, one at the front and one at the rear end of the clamping rail.
Die Betätigung wird weiterhin vereinfacht, wenn eine Einrichtung vorgesehen ist, über die alle Stellschrauben des Zylinders gemeinsam betätigbar sind. Wenn beispielsweise zwei Stellschrauben vorgesehen sind, so können diese über eine Stange miteinander verbunden sein, so daß sie nur gemeinsam verstellt werden können. Die Stellschrauben können auch über einen gemeinsamen Handhebel verstellt werden oder jede Stellschraube ist mit einem solchen Handhebel versehen.The actuation is further simplified if a device is provided via which all the adjusting screws of the cylinder can be actuated together. If, for example, two set screws are provided, they can be connected to one another via a rod, so that they can only be adjusted together. The set screws can also be adjusted using a common hand lever or each set screw is provided with such a hand lever.
Während beim Stand der Technik Spannschrauben in die vordere Spannleiste eingespannt sind, haben die bei der vorliegenden Erfindung vorgesehenen Stellschrauben nicht die Aufgabe, die Druckplatte zu spannen. Sie sollen lediglich bewirken, daß nach dem Einhängen der vorderen Spannschiene mit anhängender Druckplatte in die Zylindergrube diese einen Abstand vom zylinderfesten Anschlag hat. Anschließend werden die Stellschrauben gelöst und die Federn drücken die Spannleiste zur Anlage an den zylinderfesten Anschlag und es ist dann unmittelbar die gesuchte Nullage eingenommen.While in the prior art clamping screws are clamped in the front clamping bar, the adjusting screws provided in the present invention do not have the task of clamping the pressure plate. They are only intended to ensure that after the front tensioning rail with the attached pressure plate is hooked into the cylinder pit, it is at a distance from the cylinder-fixed stop. Then the set screws are loosened and the springs press the clamping bar against the cylinder-fixed stop and the desired zero position is then immediately adopted.
Die Erfindung wird im folgenden anhand eines Ausführungsbeispiels näher erläutert, aus dem sich weitere wichtige Merkmale ergeben. Es zeigt:
- Fig. 1
- - schematisch eine Stirnansicht eines Abschnitts eines erfindungsgemäßen Druckzylinders zur Erläuterung des grundsätzlichen Aufbaus der Spann- und Justiermittel für die Druckplatte;
- Fig. 2
- - in einer gegenüber Fig. 1 vergrößerten Darstellung die erfindungsgemäße Ausbildung der Justiermittel für die vordere Spannleiste;
- Fig. 3
- - ebenfalls schematisch eine Draufsicht auf die Anordnung nach Fig. 2.
- Fig. 1
- - schematically, an end view of a portion of a printing cylinder according to the invention to explain the basic structure of the clamping and adjusting means for the printing plate;
- Fig. 2
- - In an enlarged view compared to Figure 1, the inventive design of the adjusting means for the front clamping bar.
- Fig. 3
- - Also schematically a top view of the arrangement according to FIG. 2.
In Fig. 1 ist in einer schematischen stirnseitigen Ansicht ein Ausschnitt aus einem Druckzylinder 1 gezeigt, der sich in Richtung des Pfeiles 2 dreht. In axialer Richtung des Zylinders erstreckt sich eine Zylindergrube 3. In dieser ist eine vordere Spannleiste 4 und eine hintere Spannleiste 5 aufgenommen. Über geeignete Stifte 6 sind die Enden einer Druckplatte 7 mit den Spannleisten 4, 5 lösbar verbunden. Die Stifte greifen in entsprechende Löcher in den Endbereichen der Druckplatte ein.In Fig. 1, a schematic front view shows a section of a pressure cylinder 1 which rotates in the direction of
Beide Spannleisten 4, 5 sind in Umfangsrichtung, d.h. in Richtung des Doppelpfeils 8 um ein gewisses Maß verstellbar, wobei die hintere Spannleiste in aller Regel um einen größeren Spannweg von einigen Millimetern verstellt werden kann und die vordere Spannleiste 4 um einen kleineren Justierweg von einigen Zehntel Millimetern. Beide Spannleisten 4,5 sind in der Grube auf geeigneten Führungen verschiebbar gehalten, die zeichnerisch nicht dargestellt sind.Both
Fig. 2 zeigt Einzelheiten der erfindungsgemäßen Ausbildung der vorderen Spannleiste 4 mit zugehörigen Bauelementen, mit denen die Nullposition der Druckplatte 7 definiert eingenommen werden kann.Fig. 2 shows details of the inventive design of the
Hierzu ist eine Leiste 9 auf dem Boden der Zylindergrube 3 befestigt, die an der von der vorderen Grubenwand 10 abgewandten Seite der Spannleiste 4 angeordnet ist. In die Leiste 9 sind außerdem beabstandet voneinander mehrere Anschlagschrauben 11 eingeschraubt. Vgl. hierzu auch Fig. 3, in der die Anschlagschrauben nur schematisch angedeutet sind. Die Spitzen 12 der Schrauben 11 bilden also einen zylinderfesten Anschlag für die vordere Spannleiste 4 aus.For this purpose, a
Diese wird über Federn 13 gegen die Spitzen der Schrauben 11 gedrückt. Diese müssen nicht als Schraubenfedern ausgebildet sein, wie zeichnerisch dargestellt, sondern es sind auch andere Federmittel möglich.This is pressed against the tips of the
Außerdem sind Stellschrauben 14 in Durchgangslöcher der Spannleisten 4 eingesetzt, deren Spitzen in Gewindebohrungen 15 des Zylinders eingeschraubt sind.In addition, set
Nachdem die Enden der Druckplatte 7 mit den Spannleisten 4, 5 verbunden sind, werden die Spannleisten, wie in Fig. 1 angedeutet, in die Grube 3 eingesetzt. Durch eine geeignete Verschiebung der hinteren Spannleiste 5 nach rechts in Fig. 1 wird dann die Druckplatte gespannt.After the ends of the
In dieser Lage besteht ein Abstand von beispielsweise einigen Zehntel Millimetern zwischen den Spitzen 12 der Schrauben 11 und der an ihnen anliegenden Wand 16 der vorderen Spannleiste 4.In this position, there is a distance of, for example, a few tenths of a millimeter between the
Nach dem Spannen der Druckplatte muß zur richtigen Definition des Druckanfangs die definierte Nullposition der vorderen Spannleiste und mit ihr auch des Druckanfangs der Druckplatte 7 angefahren werden. Zu diesem Zweck betätigt man die Stellschrauben 14, so daß diese die Spannleiste 4 freigeben, so daß die Federn 13 die Spannleiste in Richtung des Pfeiles 17 in Fig. 2 verschieben und zur Anlage an den Schrauben 11 bringen können. Ohne weitere Tätigkeiten ist jetzt die definierte und einmal gefundene Nullage eingenommen.After tensioning the pressure plate, the defined zero position of the front tensioning bar and with it also the pressure start of the
Fig. 3 zeigt noch, daß man für jede Spannleiste mit zwei der Stellschrauben 14 auskommt, die über eine geeignete, zeichnerisch nicht dargestellte Einrichtung auch gemeinsam betätigt werden können.Fig. 3 shows that you can get by for each clamping bar with two of the adjusting screws 14, which can also be operated together via a suitable device, not shown in the drawing.
Bei der erwähnten Verstellung der vorderen Spannleiste 4 können auch kleinere Buckel am vorderen Ende der Druckplatte über dem Druckzylinder ausgeglichen werden; dies ist wegen der hohen Reibungskraft zwischen der Druckplatte und dem Druckzylinder durch ein Verstellen der hinteren Spannleiste 5 nicht möglich, ohne die Druckplatte zu beschädigen.In the aforementioned adjustment of the
Nach der einmal gefundenen Nullposition der Schrauben 11 wird diese durch Blockierschrauben 18 blockiert. Die gefundene Position kann anschließend verriegelt werden, beispielsweise durch Lack.After the zero position of the
Zweckmäßigerweise sind die Federmittel 13 in einer geeigneten Aufnahme 19 der Spannschiene oder Spannleiste 4 aufgenommen.The spring means 13 are expediently received in a
Claims (6)
- A device for precisely positioning and tensioning a printing plate (7) on a printing cylinder (1) of a printing mechanism, wherein a groove (3) extending in the axial direction of the cylinder (1) is provided on the periphery of the printing cylinder (1) in order to receive tensioning and fastening means for the printing plate (7), which comprise a front tensioning rail (4) for the leading edge of the printing plate (7) and a rear tensioning rail (5) - located in front of the front tensioning rail (4) in the direction of rotation (2) of the printing cylinder (1) - for the trailing edge of the printing plate (7), wherein means (6) are provided for detachably fastening the ends of the printing plate (7) to the two tensioning rails (4, 5), wherein additional means are provided for displacing the rear tensioning rail in the peripheral direction (8) of the printing cylinder (1) over a greater tensioning path with a view to tensioning the printing plate (7) on the cylinder periphery, and means are provided for displacing the front tensioning rail (4) in the peripheral direction (8) of the printing cylinder (1) over a smaller adjusting path in order to adjust the typography in the machine, and wherein the displacing means for adjusting the printing plate cooperate with a limit stop, which is integral with the cylinder and acts as a zeroing position,
characterised in that the limit stop (12), which is integral with the cylinder and forms the zeroing position of the front tensioning rail (4), is arranged on the side (16) of the front tensioning rail (4) facing the rear tensioning rail (5), and in that spring means (13) are provided which press the front tensioning rail (4) against the limit stop (12). - A device according to Claim 1,
characterised in that the limit stop (12), which is integral with the cylinder. is displaceable and can be locked in position once this position has been set. - A device according to Claim 2,
characterised in that a stop screw (11) is screwed into a tapped borehole in a ridge (9), which is arranged in the groove (3) so as to be integral with the cylinder, and a locking screw (18) rests against the periphery of this stop screw (11). - A device according to any one of Claims 1 - 3,
characterised in that the limit stop (12) and the springs (13) are aligned coaxially to one another. - A device according to any one of Claims 1 - 4,
characterised in that at least one setting screw (14) is provided, by means of which it is possible to set the spacing between the front tensioning rail (4) and the limit stop (12). - A device according to Claim 5,
characterised in that a device is provided, by means of which it is possible to actuate all the setting screws (14) of the cylinder (1) together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT90119357T ATE97610T1 (en) | 1989-10-09 | 1990-10-09 | DEVICE FOR CLAMPING A PRINTING PLATE IN THE PRECISE POSITION ON A PRINTING CYLINDER. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3933678 | 1989-10-09 | ||
| DE3933678A DE3933678A1 (en) | 1989-10-09 | 1989-10-09 | DEVICE FOR ACCURATELY POSITIONING A PRINT PLATE ON A PRINT CYLINDER |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0429808A1 EP0429808A1 (en) | 1991-06-05 |
| EP0429808B1 true EP0429808B1 (en) | 1993-11-24 |
Family
ID=6391111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP90119357A Expired - Lifetime EP0429808B1 (en) | 1989-10-09 | 1990-10-09 | Device for precisely registering and tensioning a printing plate upon an impression cylinder |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US5259312A (en) |
| EP (1) | EP0429808B1 (en) |
| JP (1) | JPH04500050A (en) |
| AT (1) | ATE97610T1 (en) |
| DE (2) | DE3933678A1 (en) |
| ES (1) | ES2048924T3 (en) |
| WO (1) | WO1991004859A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4205276A1 (en) * | 1992-02-21 | 1993-08-26 | Roland Man Druckmasch | DEVICE FOR CLAMPING A PRINT PLATE ON A PLATE CYLINDER |
| DE4210897C1 (en) * | 1992-04-02 | 1993-08-12 | Man Roland Druckmaschinen Ag, 6050 Offenbach, De | |
| DE4240462C2 (en) * | 1992-12-02 | 1994-09-22 | Roland Man Druckmasch | Device for the precise registration of printing plates on the plate cylinder of printing machines |
| DE4306237A1 (en) * | 1993-02-27 | 1994-09-01 | Heidelberger Druckmasch Ag | Device for setting the inclined register in a clamping device for clamping printing plates in an offset printing machine |
| DE4306139C2 (en) * | 1993-02-27 | 1996-10-10 | Heidelberger Druckmasch Ag | Device for carrying out work steps in a cylinder of a printing press |
| US5553544A (en) * | 1995-04-12 | 1996-09-10 | Heidelberg Harns Inc. | Plate cylinder |
| DE19613963C2 (en) * | 1996-04-09 | 1999-03-04 | Heidelberger Druckmasch Ag | Device for detaching a sheet from a blanket cylinder of a printing machine |
Family Cites Families (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1198377B (en) * | 1961-10-21 | 1965-08-12 | Maschf Augsburg Nuernberg Ag | Device on a device for attaching flexible printing plates to the forme cylinder of rotary printing machines |
| GB1195711A (en) * | 1967-04-12 | 1970-06-24 | Crabtree Mann Ltd | Improvements in or relating to printing cylinders with printing plate clamping means thereon |
| DE1786317B1 (en) * | 1968-01-15 | 1971-12-30 | Register System Gmbh | DEVICE FOR FASTENING AND ADJUSTING BENDING PRESSURE PLATES TO PLATE CYLINDERS OF PRINTING MACHINES |
| US3625151A (en) * | 1969-07-07 | 1971-12-07 | Baker Perkins Ltd | Printing plate locking device |
| DE2105633A1 (en) * | 1971-02-06 | 1972-08-10 | Koenig & Bauer Schnellpressfab | Plate clamping device on steel engraving machines |
| DE2225016C3 (en) * | 1972-05-23 | 1976-01-29 | Koenig & Bauer Ag | DEVICE FOR CLAMPING FLEXIBLE PRINTING PLATES ON FORMING CYLINDERS OF ROTARY PRINTING MACHINES |
| US3884147A (en) * | 1972-05-26 | 1975-05-20 | Roland Offsetmaschf | Device for fastening flexible printing plates |
| US3946670A (en) * | 1972-07-17 | 1976-03-30 | Ball Corporation | Apparatus for mounting and locking printing plates |
| DE2238852C3 (en) * | 1972-08-07 | 1979-08-23 | Register System Gmbh, 8000 Muenchen | Device for fastening and adjusting flexible printing plates on plate cylinders |
| DE2500282A1 (en) * | 1975-01-04 | 1976-07-29 | Karlheinz Ahlsdorf | Printing plate holder for offset printing machines - has plate holding pins which are retracted by screws in clamping profile |
| US3994224A (en) * | 1975-06-09 | 1976-11-30 | Newspaper Equipment Company | Mounting structure for printing plates |
| US4006686A (en) * | 1975-09-18 | 1977-02-08 | Ackerman Stephen P | Blanket fastening means for a cylinder blanket |
| DE2556237C2 (en) * | 1975-12-13 | 1986-05-28 | Stahlecker, Fritz, 7347 Bad Überkingen | Spinning machine system with several open-end spinning machines and at least one maintenance device |
| CH653616A5 (en) * | 1983-07-26 | 1986-01-15 | De La Rue Giori Sa | METHOD FOR FIXING AND ADJUSTING A PRINTING PLATE ON A PLATE-HOLDING CYLINDER AND DEVICE FOR IMPLEMENTING SAME. |
| DE3443353A1 (en) * | 1984-11-28 | 1986-06-05 | M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach | DEVICE FOR TENSIONING PRINTING PLATES ON FLEXO AND OFFSET PLATE CYLINDERS |
| DE3510440A1 (en) * | 1985-03-22 | 1986-09-25 | Heidelberger Druckmaschinen Ag, 6900 Heidelberg | DEVICE FOR CLAMPING AND ALIGNING FLEXIBLE PRINT PLATES ON THE PLATE CYLINDER OF ROTARY PRINTING MACHINES |
| DE3866063D1 (en) * | 1987-08-25 | 1991-12-12 | Heidelberger Druckmasch Ag | DEVICE FOR CLAMPING FLEXIBLE PRINTING PLATES ON THE PLATE CYLINDER OF ROTARY PRINTING MACHINES. |
| DD269585A1 (en) * | 1987-12-30 | 1989-07-05 | Polygraph Leipzig | DEVICE FOR LAYING UP QUICK RELIEF OF FLEXIBLE PRESSURE PLATES |
| DE3806526A1 (en) * | 1988-03-01 | 1989-09-14 | Heidelberger Druckmasch Ag | DEVICE FOR TENSIONING FLEXIBLE PRINTING PLATES ON THE PLATE CYLINDER OF ROTARY PRINTING MACHINES |
| DE3936459C1 (en) * | 1989-11-02 | 1991-04-18 | Man Roland Druckmaschinen Ag, 6050 Offenbach, De |
-
1989
- 1989-10-09 DE DE3933678A patent/DE3933678A1/en active Granted
-
1990
- 1990-10-09 AT AT90119357T patent/ATE97610T1/en not_active IP Right Cessation
- 1990-10-09 DE DE90119357T patent/DE59003614D1/en not_active Expired - Fee Related
- 1990-10-09 EP EP90119357A patent/EP0429808B1/en not_active Expired - Lifetime
- 1990-10-09 ES ES90119357T patent/ES2048924T3/en not_active Expired - Lifetime
- 1990-10-09 US US07/687,912 patent/US5259312A/en not_active Expired - Fee Related
- 1990-10-09 WO PCT/EP1990/001686 patent/WO1991004859A1/en unknown
- 1990-10-09 JP JP2514727A patent/JPH04500050A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04500050A (en) | 1992-01-09 |
| ES2048924T3 (en) | 1994-04-01 |
| ATE97610T1 (en) | 1993-12-15 |
| US5259312A (en) | 1993-11-09 |
| DE3933678C2 (en) | 1991-08-14 |
| EP0429808A1 (en) | 1991-06-05 |
| DE59003614D1 (en) | 1994-01-05 |
| WO1991004859A1 (en) | 1991-04-18 |
| DE3933678A1 (en) | 1991-04-18 |
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