EP0933207A1 - Method and apparatus for prepositioning of a printing plate true to register - Google Patents

Method and apparatus for prepositioning of a printing plate true to register Download PDF

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Publication number
EP0933207A1
EP0933207A1 EP98123530A EP98123530A EP0933207A1 EP 0933207 A1 EP0933207 A1 EP 0933207A1 EP 98123530 A EP98123530 A EP 98123530A EP 98123530 A EP98123530 A EP 98123530A EP 0933207 A1 EP0933207 A1 EP 0933207A1
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EP
European Patent Office
Prior art keywords
plate
positioning
register
prepositioning
sensor means
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
EP98123530A
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German (de)
French (fr)
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EP0933207B1 (en
Inventor
Stephan Rudzewitz
Frank Schumann
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Heidelberger Druckmaschinen AG
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Heidelberger Druckmaschinen AG
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Publication of EP0933207A1 publication Critical patent/EP0933207A1/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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2227/00—Mounting or handling printing plates; Forming printing surfaces in situ
    • B41P2227/30—Detecting the correct position of printing plates on the cylinder
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S101/00—Printing
    • Y10S101/36—Means for registering or alignment of print plates on print press structure

Definitions

  • the invention relates to a method for pre-positioning a register Printing plate in a plate feed device, wherein the printing plate through Positioning means of the plate feeder prepositioned and then the Plate cylinder fed and the same in the leading edge clamping device is clamped.
  • the invention further relates to a device for carrying out the method a plate feed device which has at least two positioning pins which to pre-position a printing plate in recesses of the same and the can be disengaged, as well as means for transferring the prepositioned Pressure plate to the front edge clamping device of the plate cylinder.
  • Such prepositioning of a printing plate is known from DE 195 08 844 A1 known.
  • the plate feed device known from this document is not can be checked whether the pre-positioning has been carried out correctly and thus in register.
  • a transport device provided on which suction cups are arranged, which are the prepositioned pressure plate to capture. Then the transport device, by pneumatic cylinder driven, the pressure plate in the front edge clamping device of the plate cylinder.
  • This type of transfer of the pre-positioned printing plate to the Leading edge tensioning device is not only complex and expensive, but also too inaccurate to register the pre-positioned printing plate to the Hand over the leading edge clamping device of the plate cylinder.
  • the invention is therefore based on the object that the method mentioned and the device mentioned at the outset are designed such that the control of the accurate positioning of the printing plate and the correction of the same as far as possible while the machine is running.
  • the object is achieved in that the Precise register positioning of sensor means recorded and if necessary is corrected and then an accurate transfer to the Leading edge clamping device of the plate cylinder takes place.
  • the object is achieved in that the Plate feed device sensor means for register-accurate registration Has prepositioning of the printing plate and the means for transferring the Pressure plate are designed in such a way that the register-accurate prepositioning is obtained remains.
  • the printing plate is provided in register so that after the transfer of the pre-positioned printing plate to the plate cylinder usually only the fine adjustments still have to be made while the machine is at a standstill a test print is required anyway. Correcting the positioning of the Pressure plate after insertion into the leading edge tensioning device is in front of the It is usually no longer necessary to carry out a test print because of the Invention these corrections are moved to the printing plate feeder. On in this way, such corrections can already be made at a time when the Press still prints the previous job. In this way the Machine downtimes are shortened, increasing the machine's profitability.
  • a particularly advantageous with regard to the register accuracy of the transfer Development of the method provides that the printing plates in the position of Precise pre-positioning can be held and the inclusion in the Front edge tensioning device is carried out by turning the plate cylinder backwards.
  • An expedient embodiment provides that the register-accurate recording in the leading edge clamping device of the plate cylinder is detected by sensor means, to check the correctness of the delivery and, if necessary, a correction to be able to make. This way another check is done and it is possible that misadjustments and malfunctions even before a Sample prints can be noticed and corrected.
  • the Means for transferring the printing plate arranged in the plate feed device Have holding means that detects the prepositioned printing plate that the Pre-positioning pins are equipped with drives that disengage them can be brought, and that the plate feeder is designed and is positionable that the pre-positioned and held pressure plate when removed Pre-positioning pins by turning the plate cylinder backwards into the Front edge tensioning device can be inserted.
  • the Holding means is at least one suction cup.
  • a further development provides that the leading edge tensioning device Positioning pins and sensor means for registering the exact positioning having. As already mentioned for the procedure, errors that occur can be detected immediately and be corrected in time.
  • An embodiment for preventing the reverse use of a Pressure plate suggests that a pre-positioning pin and / or positioning pin and one Recess on one side of a printing plate leading edge compared to another Pre-positioning pin and / or positioning pin on the center line opposite side of the printing plate leading edge not interchangeable Have engagement positions. Leave these non-interchangeable engagement positions evolve in different ways, regarding the Design options are referred to the description of the figures.
  • the sensor means electrical Contacts are the exact engagement of the prepositioning pins and / or Positioning pins in the recesses close a circuit, for example via the pressure plate.
  • the Pre-positioning pins and / or positioning pins only in a partial area on their front Side are designed as electrical contacts. This ensures that it is too the electrical contact only comes when the positioning pins are completely in the Apply recesses.
  • capacitive or inductive sensors can also be used as sensor means be used.
  • plastic printing plates can be used optical sensors, ultrasonic sensors or microswitches can also be provided.
  • FIG. 1 shows a possible arrangement of sensor means 8 and 9 for detecting the register-accurate pre-positioning of a printing plate 1 in a plate feed device 13 or also for registering the register-accurate positioning in the front edge clamping device 14 of a plate cylinder 2.
  • prepositioning pins 3 and 4 or on positioning pins 3 'and 4' are electrical Contacts 18 arranged which when the pre-positioning pins 3, 4 or Positioning pins 3 ', 4' in recesses 5, 6 of a pressure plate 1 touch and thereby closing a circuit.
  • the signal can be sent to an evaluation device 20 are given and a display device 21 indicates that the printing plate 1 is positioned exactly in register.
  • the signal can of course also be sent to the Machine controls are given which, upon receipt, pave the way for further Approves procedural steps.
  • FIG. 1 a shows a further embodiment, the prepositioning pins 3, 4 or positioning pins 3 ', 4' not yet having engaged in the recesses 5, 6 of the pressure plate 1.
  • Both in FIG. 1 and in FIG. 1a are shapes of the prepositioning pins 3, 4 or the positioning pins 3 ', 4' and the recesses 5, 6 of the pressure plate 1 selected by which contact is only given when the pressure plate 1 is inserted correctly is possible.
  • These different forms are expediently one
  • FIG. 2 shows an exemplary embodiment of a plate feed device 13 and its interaction with the front edge clamping device 14 of a plate cylinder 2.
  • pre-positioning pins 3, 4 are arranged which can be moved in the direction of the double arrows 22. As a result, they can be brought into an engagement position in which, as shown in FIG. 1, they engage in recesses 5 and 6 of a pressure plate 1.
  • These prepositioning pins 3, 4 have sensor means 8 and 9, which are either designed as shown in FIGS. 1 and 1a or have another of the design options mentioned above.
  • a printing plate 1 is inserted into the plate feed device 13 from above, then it is guided by guide means 12 and as long in the direction of arrow 10 inserted until the recesses 5 and 6 into the prepositioning pins 3 and 4 intervention.
  • the sensor means 8 and 9 report the exact contact of the recesses 5 and 6 on the prepositioning pins 3 and 4, holding means 16 can take action.
  • these are designed as suction cups 17, which are preferably spaced apart in the vertical direction.
  • the Pressure plate 1 keeps exactly their pre-positioning, held by the suction cups 17 at.
  • the pre-positioning pins 3 and 4 By arranging the pre-positioning pins 3 and 4 on the lower End of the plate feeder 13 and by the training and positioning the plate feeder 13, it is possible that the printing plate leading edge 7 of the front edge clamping device 14 of the plate cylinder 2 is received.
  • the plate cylinder 2 rotates from the drawn position in the direction of the arrow 28 backwards until the pressure plate 1 is inserted into the front edge tensioning device 14.
  • the positioning pins 3 'and 4' can repeated control of the positioning also equipped with sensor means 8, 9 be.
  • the plate cylinder 2 After the insertion of the printing plate leading edge 7 in the Leading edge clamping device 14 closes the movable clamping jaw 23 and inhibits thereby the printing plate leading edge 7.
  • the double arrow 24 indicates the tension or Release movement of the movable jaw 23 on.
  • the plate cylinder 2 After clamping the Printing plate 1, the plate cylinder 2 makes a forward rotation in the direction of Arrow 29 and takes on the pressure plate 1, which at the end with its rear edge can still be inserted into a rear edge tensioning device and tensioned.
  • the prepositioning pins 3 and 4 and Positioning pins 3 'and 4' have an offset 11 of their engagement positions, thereby creating a reverse insertion is no longer possible.
  • the front edge tensioning device 14 must be equipped with guide means 12 which an inclined position of the pressure plate 1 with a contact despite reverse Prevent insertion.
  • Fig. 2a shows a section II-II through the plate feed device 13. It is shown how the guide means 12 are designed as U-shaped grips 15. This ensures when inserting the pressure plate 1 that it is guided so that the recesses 5 and 6 engage in the pre-positioning pins 3 and 4 and usually an exact pre-positioning is achieved immediately. When the sensor means 8 and 9 signal such an exact pre-positioning, the holding means 16 designed as a suction cup 17 are activated.
  • FIG. 2a further shows how the plate feed device 13 is equipped with sliding devices 25. These can be rollers or beads coated with lubricant.
  • FIG. 3 shows a partial area of an exemplary embodiment of a plate feed device 13. Shown are the prepositioning pins 3 and 4 arranged at the lower end, which can be displaced by drives 26, as was shown by the double arrows 22 in FIG. 2. Above the pre-positioning pins 3, 4, holding means 16 designed as lifting suction devices 17 are arranged, their function being described above. Rollers 27 at the end of the plate feed device 13 ensure damage-free guidance of the printing plates 1 in the end region of the plate feed device 13 during transfer to the plate cylinder 2.
  • Fig. 4 shows a detail of a plate feed device 13.
  • a resilient guide element 19 is arranged in the area of the pre-positioning pins 3 and 4, which ensures that printing plates 1 with which printing has already been carried out and which have a curvature , are guided such that the pre-positioning pins 3 and 4 engage in the recesses 5 and 6 of the pressure plate. As a result, such printing plates 1 can also be handled without problems.

Abstract

The arrangement has at least two pre-positioning pins (3,4) which engage apertures (5,6) in the printing plate (1) to pre-position it, and which can be disengaged, and an arrangement for transferring the pre-positioned plate to the front edge clamp (14) of the plate cylinder. The plate delivery arrangement (13) has sensors for detecting index accurate pre-positioning of the plate. The transfer arrangement maintains the position.

Description

Die Erfindung betrifft ein Verfahren zur registergenauen Vorpositionierung einer Druckplatte in einer Plattenzuführvorrichtung, wobei die Druckplatte durch Positioniermittel der Plattenzuführvorrichtung vorpositioniert und dann dem Plattenzylinder zugeführt und in die Vorderkantenspanneirrichtung desselben eingespannt wird.The invention relates to a method for pre-positioning a register Printing plate in a plate feed device, wherein the printing plate through Positioning means of the plate feeder prepositioned and then the Plate cylinder fed and the same in the leading edge clamping device is clamped.

Die Erfindung betrifft weiterhin eine Vorrichtung zur Durchführung des Verfahrens mit einer Plattenzuführvorrichtung, welche mindestens zwei Positionierstifte aufweist, die zur Vorpositionierung einer Druckplatte in Ausnehmungen derselben eingreifen und die außer Eingriff bringbar sind, sowie mit Mitteln zur Übergabe der vorpositionierten Druckplatte an die Vorderkantenspanneinrichtung des Plattenzylinders.The invention further relates to a device for carrying out the method a plate feed device which has at least two positioning pins which to pre-position a printing plate in recesses of the same and the can be disengaged, as well as means for transferring the prepositioned Pressure plate to the front edge clamping device of the plate cylinder.

Eine derartige Vorpositionierung einer Druckplatte ist aus der DE 195 08 844 A1 bekannt. Bei der aus dieser Schrift bekannten Plattenzuführvorrichtung ist nicht überprüfbar, ob die Vorpositionierung korrekt und damit registergenau erfolgt ist. Außerdem ist als Mittel zur Übergabe der vorpositionierten Druckplatte an die Vorderkantenspanneinrichtung des Plattenzylinders eine Transporteinrichtung vorgesehen, auf der Sauger angeordnet sind, welche die vorpositionierte Druckplatte erfassen. Danach befordert die Transporteinrichtung, durch Pneumatikzylinder angetrieben, die Druckplatte in die Vorderkantenspanneinrichtung des Plattenzylinders. Diese Art der Übergabe der vorpositionierten Druckplatte an die Vorderkantenspanneinrichtung ist nicht nur aufwendig und teuer, sondern auch zu ungenau, um die vorpositionierte Druckplatte registergenau an die Vorderkantenspanneinrichtung des Plattenzylinders zu übergeben.Such prepositioning of a printing plate is known from DE 195 08 844 A1 known. In the plate feed device known from this document is not can be checked whether the pre-positioning has been carried out correctly and thus in register. In addition, as a means of transferring the pre-positioned printing plate to the Leading edge clamping device of the plate cylinder a transport device provided on which suction cups are arranged, which are the prepositioned pressure plate to capture. Then the transport device, by pneumatic cylinder driven, the pressure plate in the front edge clamping device of the plate cylinder. This type of transfer of the pre-positioned printing plate to the Leading edge tensioning device is not only complex and expensive, but also too inaccurate to register the pre-positioned printing plate to the Hand over the leading edge clamping device of the plate cylinder.

Sowohl aus der Nichtüberprüfung der Registergenauigkeit der Vorpositionierung als auch aus der Ausgestaltung der Mittel zur Übergabe der vorpositionierten Druckplatte an die Vorderkantenspanneinrichtung des Plattenzylinders ergibt sich, daß die Kontrolle der registergenauen Positionierung erst nach Einfügung in die Vorderkantenspanneinrichtung erfolgt. Dies hat jedoch den Nachteil, daß die Kontrolle und Korrektur der Registergenauigkeit der Positionierung der Druckplatte voll während des Maschinenstillstands erfolgen muß. Dadurch wird die erforderliche Rüstzeit verlängert, was zu einer geringeren Maschinenausnutzung führt.Both from the non-checking of the register accuracy of the pre-positioning as also from the design of the means for transferring the prepositioned printing plate to the leading edge tensioning device of the plate cylinder shows that the control the exact positioning only after insertion in the Leading edge tensioning device takes place. However, this has the disadvantage that the control and correcting the registration accuracy of the positioning of the printing plate fully during machine downtime. This will set up the required time lengthened, which leads to lower machine utilization.

Der Erfindung liegt daher die Aufgabe zugrunde, daß das eingangs genannten Verfahren und die eingangs genannte Vorrichtung derart ausgestaltet werden, daß die Kontrolle der registergenauen Positionierung der Druckplatte sowie die Korrektur desselben so weitgehendst wie möglich während des Maschinenlaufs erfolgen können.The invention is therefore based on the object that the method mentioned and the device mentioned at the outset are designed such that the control of the accurate positioning of the printing plate and the correction of the same as far as possible while the machine is running.

Bezuglich des Verfahrens wird die Aufgabe dadurch gelöst, daß die registergenaue Vorpositionierung von Sensormitteln erfaßt und gegebenenfalls korrigiert wird und dann eine registergenaue Übergabe an die Vorderkantenspanneinrichtung des Plattenzylinders erfolgt.With regard to the method, the object is achieved in that the Precise register positioning of sensor means recorded and if necessary is corrected and then an accurate transfer to the Leading edge clamping device of the plate cylinder takes place.

Bezüglich der Vorrichtung wird die Aufgabe erfindungsgemäß dadurch gelöst, daß die Plattenzuführvorrichtung Sensormittel zur Erfassung der registergenauen Vorpositionierung der Druckplatte aufweist und die Mittel zur Übergabe der Druckplatte derart ausgebildet sind, daß die registergenaue Vorpositionierung erhalten bleibt.With regard to the device, the object is achieved in that the Plate feed device sensor means for register-accurate registration Has prepositioning of the printing plate and the means for transferring the Pressure plate are designed in such a way that the register-accurate prepositioning is obtained remains.

Durch die Erfindung wird die Druckplatte derart registergenau bereitgestellt, daß nach der Übergabe der vorpositionierten Druckplatte an den Plattenzylinder in der Regel nur noch die Feinkorrekturen während des Maschinenstillstands erfolgen müssen, die ohnehin einen Probedruck voraussetzen. Die Korrektur der Positionierung der Druckplatte nach Einfügung in die Vorderkantenspanneinrichtung ist vor der Durchführung eines Probedrucks meistens nicht mehr erforderlich, da durch die Erfindung diese Korrekturen in die Druckplattenzuführvorrichtung verlagert sind. Auf diese Weise können solche Korrekturen bereits zu einem Zeitpunkt erfolgen, in dem die Druckmaschine noch den vorhergehenden Auftrag druckt. Auf diese Weise wird die Maschinenstillstandszeit verkürzt und damit die Wirtschaftlichkeit der Maschine erhöht.By the invention, the printing plate is provided in register so that after the transfer of the pre-positioned printing plate to the plate cylinder usually only the fine adjustments still have to be made while the machine is at a standstill a test print is required anyway. Correcting the positioning of the Pressure plate after insertion into the leading edge tensioning device is in front of the It is usually no longer necessary to carry out a test print because of the Invention these corrections are moved to the printing plate feeder. On in this way, such corrections can already be made at a time when the Press still prints the previous job. In this way the Machine downtimes are shortened, increasing the machine's profitability.

Eine bezuglich der Registergenauigkeit der Übergabe besonders vorteilhatte Weiterbildung des Verfahrens sieht vor, daß die Druckplatten in der Position der registergenauen Vorpositionierung gehalten werden und die Aufnahme in die Vorderkantenspanneinrichtung durch ein Rückwärtsdrehen des Plattenzylinders erfolgt.A particularly advantageous with regard to the register accuracy of the transfer Development of the method provides that the printing plates in the position of Precise pre-positioning can be held and the inclusion in the Front edge tensioning device is carried out by turning the plate cylinder backwards.

Eine zweckmäßige Ausgestaltung sieht vor, daß auch die registergenaue Aufnahme in die Vorderkantenspanneinrichtung des Plattenzylinders durch Sensormittel erfaßt wird, um die Korrektheit der Übergabe zu überprüfen und gegebenenfalls eine Nachkorrektur vornehmen zu können. Auf diese Weise erfolgt eine weitere Kontrolle, und es ist möglich, daß Fehleinstellungen und Fehlfunktionen schon vor der Vornahme eines Probedrucks bemerkt werden und korrigiert werden können.An expedient embodiment provides that the register-accurate recording in the leading edge clamping device of the plate cylinder is detected by sensor means, to check the correctness of the delivery and, if necessary, a correction to be able to make. This way another check is done and it is possible that misadjustments and malfunctions even before a Sample prints can be noticed and corrected.

Bezuglich der Ausgestaltung der Mittel zur registergenauen Übergabe der vorpositionierten Druckplatte an die Vorderkantenspanneinrichtung des Plattenzylinders gibt es verschiedenartige technische Möglichkeiten. Beispielsweise ist es möglich, diese Mittel derart auszubilden, daß eine Transporteinrichtung für die Druckplatte mit entsprechenden Maßnahmen zur Gewährleistung einer absoluten Parallelität der Position der Druckplattenvorderkante vor und nach dem Transport versehen ist. Dies ist jedoch aufwendig und teuer. Deshalb wird als einfache und optimal funktionierende Weiterbildung zur Erzielung einer registergenauen Übergabe vorgeschlagen, daß die Mittel zur Übergabe der Druckplatte ein in der Plattenzuführvorrichtung angeordnetes Haltemittel aufweisen, das die vorpositionierte Druckplatte erfaßt, daß die Vorpositionierstifte mit Antrieben ausgestattet sind, durch die sie außer Eingriff bringbar sind, und daß die Plattenzuführvorrichtung derart ausgebildet und positionierbar ist, daß die vorpositionierte und gehaltene Druckplatte bei weggefahrenen Vorpositionierstiften durch eine Rückwärtsdrehung des Plattenzylinders in die Vorderkantenspanneinrichtung einfügbar ist. Zusätzlich wird vorgeschlagen, daß das Haltemittel mindestens ein Hubsauger ist. Regarding the design of the means for register-accurate transfer of the pre-positioned printing plate to the leading edge clamping device of the plate cylinder there are various technical possibilities. For example, it is possible to do this Form means such that a transport device for the printing plate with appropriate measures to ensure absolute parallelism of the Position of the printing plate leading edge before and after transport is provided. This is however complex and expensive. That is why it is considered simple and optimally functioning Continuing education to achieve a register-accurate handover suggested that the Means for transferring the printing plate arranged in the plate feed device Have holding means that detects the prepositioned printing plate that the Pre-positioning pins are equipped with drives that disengage them can be brought, and that the plate feeder is designed and is positionable that the pre-positioned and held pressure plate when removed Pre-positioning pins by turning the plate cylinder backwards into the Front edge tensioning device can be inserted. In addition, it is proposed that the Holding means is at least one suction cup.

Um die Druckplatten möglichst schon bei der Einführung in die Plattenzuführvorrichtung exakt positionieren zu können wird vorgeschlagen, daß an der Plattenzuführvorrichtung Führungsmittel angeordnet sind. Solche Führungsmittel können als seitliche U-förmige Umgreifungen ausgestaltet sein. Durch derartige Führungen ist es möglich, daß die Druckplatte schon beim Einführen in die Plattenzuführvorrichtung derart exakt positioniert wird, daß eine Korrektur oft nicht mehr erforderlich ist.To the printing plates as early as possible in the introduction to the To be able to position the plate feeder exactly, it is proposed that at the Plate feed device guide means are arranged. Such leadership can be designed as lateral U-shaped encompassing. Through such Guides, it is possible that the pressure plate already when inserted into the Plate feeder is positioned so precisely that a correction is often not more is needed.

Eine Weiterbildung sieht vor, daß auch die Vorderkantenspanneinrichtung Positionierstifte und Sensormittel zur Erfassung der registergenauen Positionierung aufweist. Wie bereits zum Verfahren erwähnt, können auftretende Fehler sofort erfaßt und zeitig korrigiert werden.A further development provides that the leading edge tensioning device Positioning pins and sensor means for registering the exact positioning having. As already mentioned for the procedure, errors that occur can be detected immediately and be corrected in time.

Eine Ausgestaltung zur Verhinderung eines seitenverkehrten Einsetzens einer Druckplatte schlägt vor, daß ein Vorpositionierstift und/oder Positionierstift und eine Ausnehmung aufeiner Seite einer Druckplattenvorderkante gegenüber einem weiteren Vorpositionierstift und/oder Positionierstift auf der bezuglich der Mittellinie gegenüberliegenden Seite der Druckplattenvorderkante nicht vertauschbare Eingriffspositionen aufweisen. Diese nicht vertauschbaren Eingriffspositionen lassen sich auf verschiedene Art und Weise ausgestalten, bezuglich der Ausführungsmöglichkeiten wird auf die Figurenbeschreibung verwiesen.An embodiment for preventing the reverse use of a Pressure plate suggests that a pre-positioning pin and / or positioning pin and one Recess on one side of a printing plate leading edge compared to another Pre-positioning pin and / or positioning pin on the center line opposite side of the printing plate leading edge not interchangeable Have engagement positions. Leave these non-interchangeable engagement positions evolve in different ways, regarding the Design options are referred to the description of the figures.

Als Sensormittel für die Erfassung des exakten Eingriffs der Vorpositionierstifte und/oder Positionierstifte in die Ausnehmungen der Druckplatten gibt es verschiedene Möglichkeiten:As sensor means for the detection of the exact engagement of the pre-positioning pins and / or there are positioning pins in the recesses of the printing plates Options:

Eine einfach zu realisierende Möglichkeit besteht darin, daß die Sensormittel elektrische Kontakte sind, die beim exakten Eingriff der Vorpositionierstifte und/oder Positionierstifte in die Ausnehmungen einen Stromkreis schließen, beispielsweise über die Druckplatte. Als vorteilhafte Ausgestaltung wird vorgeschlagen, daß die Vorpositionierstifte und/oder Positionierstifte nur in einem Teilbereich an ihrer vorderen Seite als elektrische Kontakte ausgebildet sind. Dadurch wird sichergestellt, daß es zu dem elektrischen Kontakt nur dann kommt, wenn die Positionierstifte völlig in den Ausnehmungen anliegen.An easy to implement is that the sensor means electrical Contacts are the exact engagement of the prepositioning pins and / or Positioning pins in the recesses close a circuit, for example via the pressure plate. As an advantageous embodiment, it is proposed that the Pre-positioning pins and / or positioning pins only in a partial area on their front Side are designed as electrical contacts. This ensures that it is too the electrical contact only comes when the positioning pins are completely in the Apply recesses.

Als Sensormittel können jedoch auch kapazitiv oder induktiv wirkende Sensoren eingesetzt werden. Für den Fall, daß Kunststoffdruckplatten verwendet werden, können auch optische Sensoren, Ultraschallsensoren oder Mikroschalter vorgesehen sein.However, capacitive or inductive sensors can also be used as sensor means be used. In the event that plastic printing plates can be used optical sensors, ultrasonic sensors or microswitches can also be provided.

Sollen Druckplatten zum Einsatz kommen, mit denen schon einmal gedruckt worden ist, tritt das Problem auf, daß diese eine Krümmung aufweisen und daher an den Vorpositionierstiften vorbeigleiten können. Für die Lösung diese Problems wird vorgeschlagen, daß im Bereich der Vorpositionierstifte federnde Führungselemente angeordnet sind, die die Druckplatte in den Wirkbereich der Vorpositionierstifte drücken.If printing plates that have already been used for printing are to be used, the problem arises that these have a curvature and therefore on the Pre-positioning pins can slide past. For solving this problem proposed that resilient guide elements in the area of the prepositioning pins are arranged, the pressure plate in the effective area of the prepositioning pins to press.

Die Erfindung wird nachfolgend anhand der Zeichnung erläutert, in der Prinzipskizzen und Ausführungsbeispiele dargestellt sind. Es zeigen

Fig. 1
eine Skizze einer ersten Ausführungsform einer Sensoranordnung,
Fig. 1a
eine weitere Ausführungsform,
Fig. 2
ein Ausführungsbeispiel einer Plattenzuführvorrichtung zur Erläuterung der Funktion des erfindungsgemäßen Gegenstandes,
Fig. 2a
einen Schnitt II-II durch die Plattenzuführvorrichtung,
Fig. 3
einen Teilbereich eines Ausführungsbeispiels einer Plattenzuführvorrichtung und
Fig. 4
eine Einzelheit einer Plattenzuführvorrichtung.
The invention is explained below with reference to the drawing, in which schematic diagrams and exemplary embodiments are shown. Show it
Fig. 1
1 shows a sketch of a first embodiment of a sensor arrangement,
Fig. 1a
another embodiment,
Fig. 2
an embodiment of a plate feeder to explain the function of the object of the invention,
Fig. 2a
a section II-II through the plate feeder,
Fig. 3
a portion of an embodiment of a plate feeder and
Fig. 4
a detail of a plate feeder.

Fig. 1 zeigt eine mögliche Anordnung von Sensormittel 8 und 9 zur Erfassung der registergenauen Vorpositionierung einer Druckplatte 1 in einer Plattenzuführvorrichtung 13 oder auch zur Erfassung der registergenauen Positionierung in der Vorderkantenspanneinrichtung 14 eines Plattenzylinders 2. 1 shows a possible arrangement of sensor means 8 and 9 for detecting the register-accurate pre-positioning of a printing plate 1 in a plate feed device 13 or also for registering the register-accurate positioning in the front edge clamping device 14 of a plate cylinder 2.

An Vorpositionierstiften 3 und 4 oder an Positionierstiften 3' und 4' sind elektrische Kontakte 18 angeordnet, welche beim Eingriff der Vorpositionierstifte 3, 4 oder der Positionierstifte 3', 4' in Ausnehmungen 5, 6 einer Druckplatte 1 diese berühren und damit einen Stromkreis schließen. Das Signal kann zu einer Auswertvorrichtung 20 gegeben werden und eine Anzeigevorrichtung 21 zeigt an, daß die Druckplatte 1 registergenau positioniert ist. Das Signal kann selbstverständlich auch an die Maschinensteuerung gegeben werden, die nach Erhalt den Weg für weitere Verfahrensschritte freigibt.On prepositioning pins 3 and 4 or on positioning pins 3 'and 4' are electrical Contacts 18 arranged which when the pre-positioning pins 3, 4 or Positioning pins 3 ', 4' in recesses 5, 6 of a pressure plate 1 touch and thereby closing a circuit. The signal can be sent to an evaluation device 20 are given and a display device 21 indicates that the printing plate 1 is positioned exactly in register. The signal can of course also be sent to the Machine controls are given which, upon receipt, pave the way for further Approves procedural steps.

Fig. 1a zeigt eine weitere Ausführungsform, wobei die Vorpositionierstifte 3, 4 oder Positionierstifte 3', 4' noch nicht in die Ausnehmungen 5, 6 der Druckplatte 1 eingegriffen haben. FIG. 1 a shows a further embodiment, the prepositioning pins 3, 4 or positioning pins 3 ', 4' not yet having engaged in the recesses 5, 6 of the pressure plate 1.

Sowohl in der Fig. 1 als auch in der Fig. 1a sind Formen der Vorpositionierstifte 3, 4 oder der Positionierstifte 3', 4' sowie der Ausnehmungen 5, 6 der Druckplatte 1 gewählt, durch die eine Kontaktgabe nur bei seitenrichtigen Einsetzen der Druckplatte 1 möglich ist. Diese unterschiedlichen Formen sind zweckmäßigerweise von einer Mittellinie 30 aus gesehen jeweils einer Seite der Druckplattenvorderkante 7 zugeordnet.Both in FIG. 1 and in FIG. 1a are shapes of the prepositioning pins 3, 4 or the positioning pins 3 ', 4' and the recesses 5, 6 of the pressure plate 1 selected by which contact is only given when the pressure plate 1 is inserted correctly is possible. These different forms are expediently one The center line 30 seen from one side of the printing plate front edge 7 assigned.

Fig. 2 zeigt ein Ausführungsbeispiel einer Plattenzuführvorrichtung 13 sowie deren Zusammenwirken mit der Vorderkantenspanneinrichtung 14 eines Plattenzylinders 2. Am unteren Ende der Plattenzuführvorrichtung 13 sind Vorpositionierstifte 3, 4 angeordnet, die in Richtung der Doppelpfeile 22 bewegbar sind. Dadurch können sie in eine Eingriffsposition gebracht werden, in der sie wie in Fig. 1 dargestellt in Ausnehmungen 5 und 6 einer Druckplatte 1 eingreifen. Diese Vorpositionierstifte 3, 4 weisen Sensormittel 8 und 9 auf, die entweder wie in Fig. 1 und 1a dargestellt ausgebildet sind oder eine andere der oben erwähnten Ausgestaltungsmöglichkeiten aufweisen. 2 shows an exemplary embodiment of a plate feed device 13 and its interaction with the front edge clamping device 14 of a plate cylinder 2. At the lower end of the plate feed device 13, pre-positioning pins 3, 4 are arranged which can be moved in the direction of the double arrows 22. As a result, they can be brought into an engagement position in which, as shown in FIG. 1, they engage in recesses 5 and 6 of a pressure plate 1. These prepositioning pins 3, 4 have sensor means 8 and 9, which are either designed as shown in FIGS. 1 and 1a or have another of the design options mentioned above.

Wird eine Druckplatte 1 von oben in die Plattenzuführvorrichtung 13 eingeführt, so wird sie durch Führungsmittel 12 geführt und so lange in Richtung des Pfeils 10 eingeschoben, bis die Ausnehmungen 5 und 6 in die Vorpositionierstifte 3 und 4 eingreifen. Melden die Sensormittel 8 und 9 das exakte Anliegen der Ausnehmungen 5 und 6 an den Vorpositionierstiften 3 und 4, so können Haltemittel 16 in Aktion treten. Diese sind bei dem dargestellten Ausführungsbeispiel als Hubsauger 17 ausgebildet, welche vorzugsweise in vertikaler Richtung beabstandet angeordnet sind. Haben die Hubsauger 17 die Druckplatte 1 erfaßt, können die Vorpositionierstifte 3 und 4 in Richtung der Doppelpfeile 22 in die gezeichnete Position verschoben werden. Die Druckplatte 1 behält dabei, durch die Hubsauger 17 gehalten, exakt ihre Vorpositionierung bei. Durch die Anordnung der Vorpositionierstifte 3 und 4 am unteren Ende der Plattenzuführvorrichtung 13 sowie durch die Ausbildung und Positionierung der Plattenzuführvorrichtung 13 ist es möglich, daß die Druckplattenvorderkante 7 von der Vorderkantenspanneinrichtung 14 des Plattenzylinders 2 aufgenommen wird. Dabei können jetzt Positionierstifte 3' und 4' der Vorderkantenspanneinrichtung 14 in die Ausnehmungen 5, 6 an der Druckplattenvorderkante 7 eingreifen. Zu diesem Zweck dreht der Plattenzylinder 2 von der gezeichneten Position in Richtung des Pfeils 28 rückwärts, bis die Druckplatte 1 in die Vorderkantenspanneinrichtung 14 eingefügt ist. In der Vorderkantenspanneinrichtung 14 können die Positionierstifte 3' und 4' zur nochmaligen Kontrolle der Positionierung ebenfalls mit Sensormitteln 8, 9 ausgestattet sein.If a printing plate 1 is inserted into the plate feed device 13 from above, then it is guided by guide means 12 and as long in the direction of arrow 10 inserted until the recesses 5 and 6 into the prepositioning pins 3 and 4 intervention. The sensor means 8 and 9 report the exact contact of the recesses 5 and 6 on the prepositioning pins 3 and 4, holding means 16 can take action. In the exemplary embodiment shown, these are designed as suction cups 17, which are preferably spaced apart in the vertical direction. Have the Lifting suction device 17 detects the pressure plate 1, the pre-positioning pins 3 and 4 in Direction of the double arrows 22 are moved to the position shown. The Pressure plate 1 keeps exactly their pre-positioning, held by the suction cups 17 at. By arranging the pre-positioning pins 3 and 4 on the lower End of the plate feeder 13 and by the training and positioning the plate feeder 13, it is possible that the printing plate leading edge 7 of the front edge clamping device 14 of the plate cylinder 2 is received. Here can now position pins 3 'and 4' of the leading edge clamping device 14 in the Engage recesses 5, 6 on the pressure plate leading edge 7. To this end the plate cylinder 2 rotates from the drawn position in the direction of the arrow 28 backwards until the pressure plate 1 is inserted into the front edge tensioning device 14. In the front edge clamping device 14, the positioning pins 3 'and 4' can repeated control of the positioning also equipped with sensor means 8, 9 be.

Nach der Einfügung der Druckplattenvorderkante 7 in die Vorderkantenspanneinrichtung 14 schließt die bewegbare Spannbacke 23 und Hemmt dabei die Druckplattenvorderkante 7 ein. Der Doppelpfeil 24 gibt die Spann- bzw. Freigabebewegung der bewegbaren Spannbacke 23 an. Nach dem Einspannen der Druckplatte 1 vollzieht der Plattenzylinder 2 eine Vorwärtsdrehung in Richtung des Pfeils 29 und nimmt dabei die Druckplatte 1 auf, die zum Schluß mit ihrer Hinterkante noch in eine Hinterkantenspanneinrichtung eingefügt und gespannt werden kann. After the insertion of the printing plate leading edge 7 in the Leading edge clamping device 14 closes the movable clamping jaw 23 and inhibits thereby the printing plate leading edge 7. The double arrow 24 indicates the tension or Release movement of the movable jaw 23 on. After clamping the Printing plate 1, the plate cylinder 2 makes a forward rotation in the direction of Arrow 29 and takes on the pressure plate 1, which at the end with its rear edge can still be inserted into a rear edge tensioning device and tensioned.

Bei diesem Ausführungsbeispiel weisen die Vorpositionierstifte 3 und 4 und die Positionierstifte 3' und 4' einen Versatz 11 ihrer Eingriffspositionen auf, wodurch ein seitenverkehrtes Einsetzen nicht mehr möglich ist. Bei einer derartigen Ausgestaltung muß die Vorderkantenspanneinrichtung 14 mit Führungsmitteln 12 ausgestattet sein, die eine Schräglage der Druckplatte 1 mit einer Kontaktgabe trotz seitenverkehrtem Einsetzen verhindern.In this embodiment, the prepositioning pins 3 and 4 and Positioning pins 3 'and 4' have an offset 11 of their engagement positions, thereby creating a reverse insertion is no longer possible. With such a configuration the front edge tensioning device 14 must be equipped with guide means 12 which an inclined position of the pressure plate 1 with a contact despite reverse Prevent insertion.

Fig. 2a zeigt einen Schnitt II-II durch die Plattenzuführvorrichtung 13. Es ist dargestellt, wie die Führungsmittel 12 als U-förmige Umgreifungen 15 ausgebildet sind. Dadurch wird beim Einsetzen der Druckplatte 1 erreicht, daß diese so geführt wird, daß die Ausnehmungen 5 und 6 in die Vorpositionierstifte 3 und 4 eingreifen und in der Regel gleich eine exakte Vorpositionierung erzielt wird. Wenn die Sensormittel 8 und 9 eine solche exakte Vorpositionierung signalisieren, werden die als Hubsauger 17 ausgebildeten Haltemittel 16 in Aktion gesetzt. Fig. 2a zeigt weiterhin, wie die Plattenzuführvorrichtung 13 mit Gleiteinrichtungen 25 ausgestattet ist. Es kann sich dabei um Rollen oder um mit Gleitmitteln beschichtete Sicken handeln. Fig. 2a shows a section II-II through the plate feed device 13. It is shown how the guide means 12 are designed as U-shaped grips 15. This ensures when inserting the pressure plate 1 that it is guided so that the recesses 5 and 6 engage in the pre-positioning pins 3 and 4 and usually an exact pre-positioning is achieved immediately. When the sensor means 8 and 9 signal such an exact pre-positioning, the holding means 16 designed as a suction cup 17 are activated. FIG. 2a further shows how the plate feed device 13 is equipped with sliding devices 25. These can be rollers or beads coated with lubricant.

Fig. 3 zeigt einen Teilbereich eines Ausführungsbeispiels einer Plattenzuführvorrichtung 13. Dargestellt sind die am unteren Ende angeordneten Vorpositionierstifte 3 und 4, die durch Antriebe 26 derart verschiebbar sind, wie dies durch die Doppelpfeile 22 in Fig. 2 gezeigt wurde. Oberhalb der Vorpositionierstifte 3, 4 sind als Hubsauger 17 ausgebildete Haltemittel 16 angeordnet, wobei deren Funktion oben beschrieben wurde. Rollen 27 am Ende der Plattenzuführvorrichtung 13 sorgen für eine beschädigungsfreie Führung der Druckplatten 1 im Endbereich der Plattenzuführvorrichtung 13 bei der Übergabe an den Plattenzylinder 2. FIG. 3 shows a partial area of an exemplary embodiment of a plate feed device 13. Shown are the prepositioning pins 3 and 4 arranged at the lower end, which can be displaced by drives 26, as was shown by the double arrows 22 in FIG. 2. Above the pre-positioning pins 3, 4, holding means 16 designed as lifting suction devices 17 are arranged, their function being described above. Rollers 27 at the end of the plate feed device 13 ensure damage-free guidance of the printing plates 1 in the end region of the plate feed device 13 during transfer to the plate cylinder 2.

Fig. 4 zeigt eine Einzelheit einer Plattenzuführvorrichtung 13. Zusätzlich zu den bereits beschriebenen Elementen ist im Bereich der Vorpositionierstifte 3 und 4 ein federndes Führungselement 19 angeordnet, das dafür sorgt, daß auch Druckplatten 1, mit denen schon einmal gedruckt wurde und die eine Krümmung aufweisen, derart geführt werden, daß die Vorpositionierstifte 3 und 4 in die Ausnehmungen 5 und 6 der Druckplatte eingreifen. Dadurch sind auch solche Druckplatten 1 ohne Probleme handhabbar. Fig. 4 shows a detail of a plate feed device 13. In addition to the elements already described, a resilient guide element 19 is arranged in the area of the pre-positioning pins 3 and 4, which ensures that printing plates 1 with which printing has already been carried out and which have a curvature , are guided such that the pre-positioning pins 3 and 4 engage in the recesses 5 and 6 of the pressure plate. As a result, such printing plates 1 can also be handled without problems.

BezugszeichenlisteReference list

11
Druckplatteprinting plate
22nd
PlattenzylinderPlate cylinder
33rd
VorpositionierstiftPre-positioning pin
3'3 '
PositionierstiftPositioning pin
44th
VorpositionierstiftPre-positioning pin
4'4 '
PositionierstiftPositioning pin
3,3',4,4'3.3 ', 4.4'
PositioniermittelPositioning means
55
AusnehmungRecess
66
AusnehmungRecess
77
DruckplattenvorderkantePrinting plate front edge
88th
SensormittelSensor means
99
SensormittelSensor means
1010th
Pfeil - Transportrichtung der DruckplatteArrow - transport direction of the pressure plate
1111
Versatz der EingriffspositionenOffset of the engagement positions
1212th
FührungsmittelLeadership resources
1313
PlattenzuführvorrichtungPlate feeder
1414
VorderkantenspanneinrichtungLeading edge tensioning device
1515
U-förmige UmgreifungU-shaped wrap
1616
HaltemittelHolding means
1717th
HubsaugerSuction cups
1818th
elektrische Kontakteelectrical contacts
1919th
federnde Führungselemente resilient guide elements
2020th
AuswertvorrichtungEvaluation device
2121
AnzeigevorrichtungDisplay device
2222
Doppelpfeile - Wegbewegbarkeit der Positionierstifte der PlattenzuführvorrichtungDouble arrows - movement of the positioning pins of the Plate feeder
2323
bewegbare Spannbacke der VorderkantenspannvorrichtungMovable jaw of the leading edge clamping device
2424th
Doppelpfeil - Spann- bzw. Freigabebewegung der bewegbaren SpannbackeDouble arrow - clamping or releasing movement of the movable Jaw
2525th
Gleiteinrichtung (Rollen oder Sicken)Gliding device (rolls or beads)
2626
Antriebe für die Wegbewegung der PositionierstifteDrives for moving the positioning pins away
2727
Rollen für die Führung der Druckplatte an der Vorderkante der PlattenzuführvorrichtungRollers for guiding the pressure plate on the front edge of the Plate feeder
2828
Pfeil - RückwärtsdrehungArrow - reverse rotation
2929
Pfeil - VorwärtsdrehungArrow - forward rotation
3030th
MittellinieCenter line

Claims (18)

Verfahren zur registergenauen Vorpositionierung einer Druckplatte (1) in einer Plattenzuführvorrichtung (13), wobei die Druckplatte (1) durch Positioniermittel (3, 4) der Plattenzuführvorrichtung (13) vorpositioniert und dann dem Plattenzylinder (2) zugeführt und in die Vorderkantenspanneirrichtung (14) desselben eingespannt wird,
dadurch gekennzeichnet, daß die registergenaue Vorpositionierung von Sensormitteln (8, 9) erfaßt und gegebenenfalls korrigiert wird und dann eine registergenaue Übergabe an die Vorderkantenspanneinrichtung (14) des Plattenzylinders (2) erfolgt. Method for pre-positioning a printing plate (1) in a plate feed device (13) with register accuracy, the printing plate (1) being pre-positioned by positioning means (3, 4) of the plate feed device (13) and then fed to the plate cylinder (2) and into the front edge clamping device (14) it is clamped,
characterized, that the register-accurate pre-positioning of sensor means (8, 9) is detected and corrected if necessary and then a register-accurate transfer to the front edge clamping device (14) of the plate cylinder (2) takes place. Verfahren nach Anspruch 1,
dadurch gekennzeichnet, daß die Druckplatten (1) in der Position der registergenauen Vorpositionierung gehalten werden und die Aufnahme in die Vorderkantenspanneinrichtung (14) durch ein Rückwärtsdrehen (28) des Plattenzylinders (2) erfolgt. Method according to claim 1,
characterized, that the pressure plates (1) are held in the position of the register-accurate prepositioning and the inclusion in the front edge tensioning device (14) takes place by turning the plate cylinder (2) backwards (28). Verfahren nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß auch die registergenaue Aufnahme in die Vorderkantenspanneinrichtung (14) des Plattenzylinders (2) durch Sensormittel (8, 9) erfaßt wird, um gegebenenfalls eine Nachkorrektur vorzunehmen. The method of claim 1 or 2,
characterized, that the register-accurate recording in the front edge clamping device (14) of the plate cylinder (2) is detected by sensor means (8, 9) in order to carry out a correction if necessary. Vorrichtung zur Durchführung eines Verfahrens nach einem der Ansprüche 1 bis 3 mit einer Plattenzuführvorrichtung (13), welche mindestens zwei Vorpositionierstifte (3, 4) aufweist, die zur Vorpositionierung einer Druckplatte (1) in Ausnehmungen (5, 6) derselben eingreifen und die außer Eingriff bringbar sind, sowie mit Mitteln zur Übergabe der vorpositionierten Druckplatte (1) an die Vorderkantenspanneinrichtung (14) des Plattenzylinders (2),
dadurch gekennzeichnet, daß die Platterzuführvorrichtung (13) Sensormittel (8, 9) zur Erfassung der registergenauen Vorpositionierung der Druckplatte (1) aufweist und die Mittel zur Übergabe der Druckplatte (1) derart ausgebildet sind, daß die registergenaue Vorpositionierung erhalten bleibt. Device for carrying out a method according to one of claims 1 to 3 with a plate feed device (13) which has at least two prepositioning pins (3, 4) which engage in recesses (5, 6) thereof for prepositioning a printing plate (1) and which also Can be brought into engagement, as well as with means for transferring the prepositioned pressure plate (1) to the front edge clamping device (14) of the plate cylinder (2),
characterized, that the plate feed device (13) has sensor means (8, 9) for detecting the register-accurate prepositioning of the printing plate (1) and the means for transferring the printing plate (1) are designed such that the register-precise prepositioning is retained. Vorrichtung nach Anspruch 4,
dadurch gekennzeichnet, daß die Mittel zur Übergabe der Druckplatte (1) ein in der Plattenzuführvorrichtung (13) angeordnetes Haltermittel (16) aufweisen, das die vorpositionierte Druckplatte (1) erfaßt, daß die Vorpositionierstifte (3, 4) mit Antrieben (26) ausgestattet sind, durch die sie außer Eingriffbringbar sind, und daß die Plattenzuführvorrichtung (13) derart ausgebildet und positionierbar ist, daß die vorpositionierte und gehaltene Druckplatte (1) bei weggefahrenen Vorpositionierstiften (3, 4) durch eine Rückwartsdrehung (28) des Plattenzylinders (2) in die Vorderkantenspanneinrichtung (14) einfügbar ist. Device according to claim 4,
characterized, that the means for transferring the pressure plate (1) have a holder means (16) which is arranged in the plate feed device (13) and which detects the prepositioned pressure plate (1), that the prepositioning pins (3, 4) are equipped with drives (26) which can be disengaged, and that the plate feed device (13) is designed and positionable in such a way that the pre-positioned and held pressure plate (1) can be inserted into the front edge tensioning device (14) by a backward rotation (28) of the plate cylinder (2) when the pre-positioning pins (3, 4) are moved away. Vorrichtung nach Anspruch 4 oder 5,
dadurch gekennzeichnet, daß das Haltemittel (16) mindestens ein Hubsauger (17) ist. Device according to claim 4 or 5,
characterized, that the holding means (16) is at least one lifting suction device (17). Vorrichtung nach einem der Ansprüche 4 bis 6,
dadurch gekennzeichnet, daß an der Plattenzuführvorrichtung (13) Führungsmittel (12) angeordnet sind. Device according to one of claims 4 to 6,
characterized, that guide means (12) are arranged on the plate feed device (13). Vorrichtung nach Anspruch 7,
dadurch gekennzeichnet, daß die Führungsmittel (12) seitliche U-förmige Umgreifungen (15) sind. Device according to claim 7,
characterized, that the guide means (12) are lateral U-shaped grips (15). Vorrichtung nach einem der Ansprüche 4 bis 8,
dadurch gekennzeichnet, daß auch die Vorderkantenspanneinrichtung (14) Positionierstifte (3', 4') und Sensormittel (8, 9) zur Erfassung der registergenauen Positionierung aufweist. Device according to one of claims 4 to 8,
characterized, that the front edge clamping device (14) has positioning pins (3 ', 4') and sensor means (8, 9) for detecting the register-accurate positioning. Vorrichtung nach einem der Ansprüche 4 bis 9,
dadurch gekennzeichnet, daß ein Vorpositionierstift (3) und/oder Positionierstift (3') und eine Ausnehmung (5) auf einer Seite der Druckplattenvorderkante (7) gegenüber einem weiteren Vorpositionierstift (4) und/oder Positionierstift (4
Figure 00140001
) auf der bezüglich der Mittellinie (30) gegenüberliegenden Seite der Druckplattenvorderkante (7) nicht vertauschbare Eingriffspositionen aufweisen. Device according to one of claims 4 to 9,
characterized, that a pre-positioning pin (3) and / or positioning pin (3 ') and a recess (5) on one side of the printing plate leading edge (7) relative to a further pre-positioning pin (4) and / or positioning pin (4
Figure 00140001
) have non-interchangeable engagement positions on the side of the pressure plate front edge (7) opposite the center line (30). Vorrichtung nach einem der Ansprüche 4 bis 10,
dadurch gekennzeichnet, daß die Sensormittel (8, 9) elektrische Kontakte (18) sind, die bei exaktem Eingriff der Vorpositionierstifte (3, 4) und/oder Positionierstifte (3', 4') in die Ausnehmungen (5, 6) einen Stromkreis schließen. Device according to one of claims 4 to 10,
characterized, that the sensor means (8, 9) are electrical contacts (18) which, when the pre-positioning pins (3, 4) and / or positioning pins (3 ', 4') engage in the recesses (5, 6), close a circuit. Vorrichtung nach Anspruch 11,
dadurch gekennzeichnet, daß die Vorpositionierstifte (3, 4) und/oder Positionierstifte (3', 4') nur in einem Teilbereich an ihrer vorderen Seite als elektrische Kontakte (18) ausgebildet sind. Device according to claim 11,
characterized, that the prepositioning pins (3, 4) and / or positioning pins (3 ', 4') are designed as electrical contacts (18) only in a partial area on their front side. Vorrichtung nach einem der Ansprüche 4 bis 10,
dadurch gekennzeichnet, daß die Sensormittel (8, 9) als kapazitive Sensoren ausgebildet sind. Device according to one of claims 4 to 10,
characterized, that the sensor means (8, 9) are designed as capacitive sensors. Vorrichtung nach einem der Ansprüche 4 bis 10,
dadurch gekennzeichnet, daß die Sensormittel (8, 9) optische Sensoren sind. Device according to one of claims 4 to 10,
characterized, that the sensor means (8, 9) are optical sensors. Vorrichtung nach einem der Ansprüche 4 bis 10,
dadurch gekennzeichnet, daß die Sensormittel (8, 9) Ultraschallsensoren sind. Device according to one of claims 4 to 10,
characterized, that the sensor means (8, 9) are ultrasonic sensors. Vorrichtung nach einem der Ansprüche 4 bis 10,
dadurch gekennzeichnet, daß die Sensormittel (8, 9) induktiv wirkende Sensoren sind. Device according to one of claims 4 to 10,
characterized, that the sensor means (8, 9) are inductive sensors. Vorrichtung nach einem der Ansprüche 4 bis 10,
dadurch gekennzeichnet, daß die Sensormittel (8, 9) Mikroschalter sind. Device according to one of claims 4 to 10,
characterized, that the sensor means (8, 9) are microswitches. Vorrichtung nach einem der Ansprüche 4 bis 17,
dadurch gekennzeichnet, daß im Bereich der Vorpositionierstifte (3, 4) federnde Führungselemente (19) angeordnet sind, die die Druckplatte (1) in den Wirkbereich der Vorpositionierstifte (3, 4) drücken. Device according to one of claims 4 to 17,
characterized, that resilient guide elements (19) are arranged in the area of the pre-positioning pins (3, 4) and press the pressure plate (1) into the effective area of the pre-positioning pins (3, 4).
EP98123530A 1998-01-30 1998-12-16 Method and apparatus for prepositioning of a printing plate true to register Expired - Lifetime EP0933207B1 (en)

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DE19803723A DE19803723A1 (en) 1998-01-30 1998-01-30 Method and device for pre-positioning a printing plate in register
DE19803723 1998-01-30

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EP0933207B1 EP0933207B1 (en) 2002-03-27

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Also Published As

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EP0933207B1 (en) 2002-03-27
JPH11262998A (en) 1999-09-28
DE59803502D1 (en) 2002-05-02
US6571708B1 (en) 2003-06-03
DE19803723A1 (en) 1999-08-05
JP4584372B2 (en) 2010-11-17

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