EP0933207B1 - 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 PDFInfo
- Publication number
- EP0933207B1 EP0933207B1 EP98123530A EP98123530A EP0933207B1 EP 0933207 B1 EP0933207 B1 EP 0933207B1 EP 98123530 A EP98123530 A EP 98123530A EP 98123530 A EP98123530 A EP 98123530A EP 0933207 B1 EP0933207 B1 EP 0933207B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- positioning
- plate
- printing plate
- register
- leading edge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
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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
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- 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
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- 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 is conveyed by pneumatic cylinders 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.
- EP 0 808 714 A2 shows a device for pre-positioning an accurate 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 clamped in the front edge clamping device of the same is and the register-accurate prepositioning of the printing plate is detected by sensor means and corrected if necessary.
- the invention has for its object a further method and another To create device that pre-positioning of the printing plate and accurate register correcting them as much as possible while the machine is running.
- the Plate feed device sensor means for register-accurate registration Has pre-positioning of the printing plate and the means for transferring the printing plate are designed in such a way that the precise pre-positioning is retained.
- the printing plate is provided in register so that after Transfer of the pre-positioned printing plate to the plate cylinder usually only the fine corrections have to be made while the machine is at a standstill Assume trial printing.
- the correction of the positioning of the printing plate after Insertion in the leading edge tensioning device is prior to performing a Trial prints are usually no longer required, since these corrections are made by the invention the printing plate feeder is shifted. In this way, such Corrections are 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.
- the method provides that the printing plates are in the position of the 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 pre-positioned printing plate to the leading edge clamping device of the plate cylinder there are various technical possibilities.
- 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.
- 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 with respect to 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 with respect to 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 detecting 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 they engage in recesses 5 and 6 of a pressure plate 1, as shown in FIG.
- 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. There 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 checking of the positioning also equipped with further sensor means 8, 9 his.
- the plate cylinder 2 After the insertion of the printing plate leading edge 7 in the Front edge clamping device 14 closes the movable clamping jaw 23 and clamps 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.
Landscapes
- Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
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 Vorderkantenspanneinrichtung 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 befördert 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 is conveyed by pneumatic cylinders 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 Correction of the register accuracy of the positioning of the printing plate fully during the Machine downtime must take place. This extends the set-up time required which leads to less machine utilization.
Die EP 0 808 714 A2 zeigt eine Vorrichtung zur registergenauen Vorpositionierung einer Druckplatte in einer Plattenzuführvorrichtung, wobei die Druckplatte durch Positioniermittel der Plattenzuführvorrichtung vorpositioniert und dann dem Plattenzylinder zugeführt und in die Vorderkantenspanneinrichtung desselben eingespannt wird und die registergenaue Vorpositionierung der Druckplatte von Sensormitteln erfaßt und gegebenenfalls korrigiert wird.EP 0 808 714 A2 shows a device for pre-positioning an accurate 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 clamped in the front edge clamping device of the same is and the register-accurate prepositioning of the printing plate is detected by sensor means and corrected if necessary.
Der Erfindung liegt die Aufgabe zugrunde, ein weiteres Verfahren und eine weitere Vorrichtung zu schaffen, die eine registergenaue Vorpositionierung der Druckplatte sowie eine Korrektur derselben so weit wie möglich während des Maschinenlaufs ermöglicht.The invention has for its object a further method and another To create device that pre-positioning of the printing plate and accurate register correcting them as much as possible while the machine is running.
Die Aufgabe wird durch die Merkmale der Ansprüche 1 und 3 gelöst.The object is solved by the features of
Bezüglich des Verfahrens ergibt sich der Vorteil, 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, there is the advantage that the pre-positioning accurate to the register is detected by sensor means and corrected if necessary, and then a register-accurate Transfer to the front edge clamping device of the plate cylinder takes place.
Bezüglich der Vorrichtung ergibt sich der Vorteil, 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, there is the advantage that the Plate feed device sensor means for register-accurate registration Has pre-positioning of the printing plate and the means for transferring the printing plate are designed in such a way that the precise pre-positioning is retained.
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 Transfer of the pre-positioned printing plate to the plate cylinder usually only the fine corrections have to be made while the machine is at a standstill Assume trial printing. The correction of the positioning of the printing plate after Insertion in the leading edge tensioning device is prior to performing a Trial prints are usually no longer required, since these corrections are made by the invention the printing plate feeder is shifted. In this way, such Corrections are 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.
Ein bezüglich der Registergenauigkeit der Übergabe erfindungsgemäßes Verfahren 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.One according to the invention with regard to the register accuracy of the transfer The method provides that the printing plates are in the position of the 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.
Bezüglich 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. With regard to the design of the means for transferring 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 auf einer Seite einer Druckplattenvorderkante gegenüber einem weiteren Vorpositionierstift und/oder Positionierstift auf der bezüglich der Mittellinie gegenüberliegenden Seite der Druckplattenvorderkante nicht vertauschbare Eingriffspositionen aufweisen. Diese nicht vertauschbaren Eingriffspositionen lassen sich auf verschiedene Art und Weise ausgestalten, bezüglich 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 with respect to 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 with respect to 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 Possibilities:
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.
- 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
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
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
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
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 siein
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
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 weiteren Sensormitteln 8, 9 ausgestattet
sein.If a
Nach der Einfügung der Druckplattenvorderkante 7 in die
Vorderkantenspanneinrichtung 14 schließt die bewegbare Spannbacke 23 und klemmt
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
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
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
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
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
- 11
- Druckplatteprinting plate
- 22
- Plattenzylinderplate cylinder
- 33
- VorpositionierstiftVorpositionierstift
- 3'3 '
- Positionierstiftpositioning
- 44
- VorpositionierstiftVorpositionierstift
- 4'4 '
- Positionierstiftpositioning
- 3, 3', 4, 4'3, 3 ', 4, 4'
- Positioniermittelpositioning
- 55
- Ausnehmungrecess
- 66
- Ausnehmungrecess
- 77
- DruckplattenvorderkantePrinting plate front edge
- 88th
- Sensormittelsensor means
- 99
- Sensormittelsensor means
- 1010
- Pfeil - Transportrichtung der DruckplatteArrow - transport direction of the pressure plate
- 1111
- Versatz der EingriffspositionenOffset of the engagement positions
- 1212
- Führungsmittelguide means
- 1313
- Plattenzuführvorrichtungplate supply
- 1414
- VorderkantenspanneinrichtungFront edge clamping device
- 1515
- U-förmige UmgreifungU-shaped wrap
- 1616
- Haltemittelholding means
- 1717
- Hubsaugerlifting sucker
- 1818
- elektrische Kontakteelectrical contacts
- 1919
- federnde Führungselemente resilient guide elements
- 2020
- Auswertvorrichtungevaluation device
- 2121
- Anzeigevorrichtungdisplay device
- 2222
- Doppelpfeile - Wegbewegbarkeit der Positionierstifte der PlattenzuführvorrichtungDouble arrows - movement of the positioning pins of the plate supply
- 2323
- bewegbare Spannbacke der VorderkantenspannvorrichtungMovable jaw of the leading edge clamping device
- 2424
- Doppelpfeil - Spann- bzw. Freigabebewegung der bewegbaren SpannbackeDouble arrow - clamping or releasing movement of the movable jaw
- 2525
- 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 supply
- 2828
- Pfeil - RückwärtsdrehungArrow - reverse rotation
- 2929
- Pfeil - VorwärtsdrehungArrow - forward rotation
- 3030
- Mittelliniecenter line
Claims (11)
- Method for the in-register pre-positioning of a printing plate (1) in a plate feeding device (13), wherein the printing plate (1) is pre-positioned by positioning means (3, 4) of the plate feeding device (13), is then fed to the plate cylinder (2), and is clamped in the leading edge clamping device (14) of the plate cylinder (2), and wherein the in-register pre-positioning of the printing plate (1) is detected by sensor means (8, 9) and corrected, if necessary,
characterized in that the printing plate (1) is subsequently held in the position of the in-register pre-positioning and
that the printing plate is then received in register in the leading edge clamping device (14) of the plate cylinder (2) by a backward rotation (28) of the plate cylinder (2). - Method according to claim 1,
characterized in that the in-register reception in the leading edge clamping device (14) of the plate cylinder (2), too, is detected by further sensors (8, 9) to make a correction, if necessary. - Device for implementing a method according to one of claims 1 to 2, having a plate feeding device (13) including means for transferring the pre-positioned printing plate (1) to the leading edge clamping device (14) of the plate cylinder (2), wherein sensor means (8, 9) are provided for detecting the in-register pre-positioning of the printing plate (1),
characterized in that at least two pre-positioning pins (3, 4) are provided engaging in recesses (5, 6) of the printing plate (1) for pre-positioning the latter and being disengageable by means of drives (26),
that for maintaining the in-register pre-positioning of the printing plate (1) additional holding means (16, 17) are provided, and
that the plate feeding device (13) is embodied and positionable such that, when the pre-positioning pins (3,4) have been moved away, the pre-positioned and held printing plate (1) is insertable into the leading edge clamping device (14) by a backward rotation (28) of the plate cylinder (2). - Device according to claim 3,
characterized in that the holding means (16) is at least one lifting sucker (17) stationarily arranged on the plate feeding device. - Device according to one of claims 3 or 4,
characterized in that guide means (12) are provided on the plate feeding device (13). - Device according to claim 5,
characterized in that the guide means (12) are lateral U-shaped embracing elements (15). - Device according to one of claims 3 to 6,
characterized in that the leading edge clamping device (14), too, comprises positioning pins (3', 4') and further sensor means (8, 9) for detecting the in-register positioning. - Device according to one of claims 3 to 7,
characterized in that a pre-positioning pin (3) and/or a positioning pin (3') and a recess (5) on one side of the leading edge (7) of the printing plate have non-interchangeable engagement positions in relation to a further pre-positioning pin (4) and/or positioning pin (4') on the side of the leading edge (7) of the printing plate opposite the one side with respect to a centre line (30). - Device according to one of claims 3 to 8,
characterized in that the sensor means (8, 9) and the further sensor means (8, 9) are electric contacts (18) closing a circuit when the pre-positioning pins (3, 4) and/or positioning pins (3', 4') exactly engage in the recesses (5, 6). - Device according to claim 9,
characterized in that the pre-positioning pins (3, 4) and/or positioning pins (3', 4') are embodied as electric contacts (18) only in a partial section at their front side. - Device according to one of claims 3 to 10,
characterized in that in the region of the pre-positioning pins (3, 4 ) resilient guide elements (19) are arranged, which push the printing plate (1) into the operating range of the pre-positioning pins (3, 4).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19803723 | 1998-01-30 | ||
DE19803723A DE19803723A1 (en) | 1998-01-30 | 1998-01-30 | Method and device for pre-positioning a printing plate in register |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0933207A1 EP0933207A1 (en) | 1999-08-04 |
EP0933207B1 true EP0933207B1 (en) | 2002-03-27 |
Family
ID=7856210
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98123530A Expired - Lifetime EP0933207B1 (en) | 1998-01-30 | 1998-12-16 | Method and apparatus for prepositioning of a printing plate true to register |
Country Status (4)
Country | Link |
---|---|
US (1) | US6571708B1 (en) |
EP (1) | EP0933207B1 (en) |
JP (1) | JP4584372B2 (en) |
DE (2) | DE19803723A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101746119A (en) * | 2008-12-02 | 2010-06-23 | 海德堡印刷机械股份公司 | Method and apparatus for automatically feeding printing plates |
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-
1998
- 1998-01-30 DE DE19803723A patent/DE19803723A1/en not_active Withdrawn
- 1998-12-16 DE DE59803502T patent/DE59803502D1/en not_active Expired - Lifetime
- 1998-12-16 EP EP98123530A patent/EP0933207B1/en not_active Expired - Lifetime
-
1999
- 1999-02-01 US US09/243,835 patent/US6571708B1/en not_active Expired - Fee Related
- 1999-02-01 JP JP02415599A patent/JP4584372B2/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101746119A (en) * | 2008-12-02 | 2010-06-23 | 海德堡印刷机械股份公司 | Method and apparatus for automatically feeding printing plates |
Also Published As
Publication number | Publication date |
---|---|
DE59803502D1 (en) | 2002-05-02 |
JPH11262998A (en) | 1999-09-28 |
JP4584372B2 (en) | 2010-11-17 |
US6571708B1 (en) | 2003-06-03 |
DE19803723A1 (en) | 1999-08-05 |
EP0933207A1 (en) | 1999-08-04 |
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