EP2113384B1 - Method for operating a processing device integrated in a web-fed printing press - Google Patents

Method for operating a processing device integrated in a web-fed printing press Download PDF

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Publication number
EP2113384B1
EP2113384B1 EP09158872.3A EP09158872A EP2113384B1 EP 2113384 B1 EP2113384 B1 EP 2113384B1 EP 09158872 A EP09158872 A EP 09158872A EP 2113384 B1 EP2113384 B1 EP 2113384B1
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EP
European Patent Office
Prior art keywords
substrate web
inkjet printing
printing device
help
camera
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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.)
Not-in-force
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EP09158872.3A
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German (de)
French (fr)
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EP2113384A1 (en
Inventor
Roland Hirt
Rudolf Dr. Nägele
Peter Schulmeister
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Manroland Web Systems GmbH
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Manroland Web Systems GmbH
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Publication of EP2113384A1 publication Critical patent/EP2113384A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0036—Devices for scanning or checking the printed matter for quality control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F19/00—Apparatus or machines for carrying out printing operations combined with other operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F19/00—Apparatus or machines for carrying out printing operations combined with other operations
    • B41F19/007—Apparatus or machines for carrying out printing operations combined with other operations with selective printing mechanisms, e.g. ink-jet or thermal printers

Definitions

  • the invention relates to a method for operating a processing device integrated in a web press according to the preamble of claim 1.
  • Web-fed printing presses have a plurality of printing units for static printing of at least one printing substrate web surface of at least one printing substrate web with a printed image that is the same for all printed copies.
  • Each printed copy usually contains several printed pages.
  • Such printing units that serve the static printing of the or each printing material web are typically designed as offset printing units. It is also possible that such printing units are designed as gravure printing units.
  • processing device in addition to the printing units which serve the static printing of the or each printing material web with a printed image which is the same for all printed copies, in particular in order to individualize the printed copies.
  • a processing device may be an inkjet printing device in order to print at least one printing substrate web surface of at least one printing material web with a print image that is variable for at least some printed copies, that is to say dynamically.
  • a processing device can be a painting device or an adhesive device or a laser cutting device or a film transfer device or a perforation device or an imprint device for RFID or odorants or invisible ink or the like.
  • the object of the present invention is to provide a novel method for operating a processing device integrated in a web press. This object is achieved by a method according to claim 1.
  • both the position of the processing to be carried out by the processing device can be regulated transversely to the transport direction of the printing material as well as in the transport direction of the printing material. As a result, the quality of the printed product produced can be increased.
  • the invention is not limited to this application. Rather, in the context of the invention, other processing devices such as a painting device or an adhesive device or a laser cutting device or a film transfer device or a perforation device or an imprint device for RFID or odors or invisible ink or the like may be integrated into a web press.
  • processing devices such as a painting device or an adhesive device or a laser cutting device or a film transfer device or a perforation device or an imprint device for RFID or odors or invisible ink or the like may be integrated into a web press.
  • Fig. 1 shows a schematic section of a trained as a newspaper printing press web printing machine in the region of an array 10 of two vertically superposed printing units 11, 12.
  • Such an arrangement 10 is also referred to as a printing tower.
  • the two printing units 11, 12 each have four printing units 13, wherein in the region of each printing unit 11, 12, a web-shaped substrate 14, which is transported in the vertical direction by the printing units 11, 12, on both sides, ie in the range of both printing material web surfaces, can be printed ,
  • the printing units 11, 12 are used for static printing of the printing material web 14 with a printed image that is the same for all printed copies.
  • the printing units 13 of the printing units 11, 12 are preferably designed as offset printing units. It is also possible that they are designed as gravure printing units.
  • the printing material web 14 is deflectable on a deflection roller 15 in such a way that the printing material web 14 is transported in the direction of the arrow 16 following the deflection roller 15 substantially in the horizontal direction so as to convey the printing material web 14 supply static printed substrate web 14 of an inkjet printing device 17, which serves the dynamic printing of a printing substrate web surface of the printing material web 14 with a variable at least for some printed copies print image.
  • This makes it possible to customize the printed in the printing units, static print image.
  • FIG. 2 shows the printing material web 14 to be printed in the area of the inkjet printing device 17 in plan view, with four printing pages 18 being printed side by side on the printing material web 14, as an example, viewed transversely to the transport direction (arrow 16) of the printing material web 14. According to Fig. 2 is in the area of one of these juxtaposed printed pages 18, the previously printed static image of this printed page on the inkjet printing device 17 with an impression 19 dynamized.
  • At least the dynamic impression 19 printed with the aid of the inkjet printing device 17 on the printing material web 14 is detected metrologically by means of a camera 22 associated with the inkjet printing device 17, which is positioned downstream of the inkjet printing device 17 in the transport direction of the printing material web 14 ,
  • the measurement image acquired with the aid of the camera 22 is either displayed on a screen for online comparison with a reference pattern or stored in a memory for offline comparison with a reference pattern.
  • the measurement image can be displayed as well as stored and evaluated.
  • a drive signal for the camera 22 or a camera flash of the camera 22 is generated from a drive signal of the inkjet printing device 17, wherein the drive signal for the camera 22 or the camera flash from the drive signal for the inkjet printing device 17, from the speed of the printing material web 14 and from the distance between the inkjet printing device 17 and the camera 22 in the transport direction of the printing material web 14 is determined.
  • the camera 22 it is possible for the camera 22 to detect each dynamic impression 19 made with the aid of the inkjet printing device 17. It is also possible that only every nth impression 19 is detected metrologically by means of the camera 22.
  • an environment of the impression 19 and thus the printing surface 13 of the printing material web 14 that is statically printed in the printing units 13 of the web press are detected in sections by way of measurement.
  • the inkjet printing device 17 associated camera 22 which then detects the immediate vicinity of the impression 19 with.
  • a separate camera can be used, which is movably mounted transversely to the transport direction of the printing material web on the same traverse 20 or a separate traverse.
  • an actual position of the impression 19 carried out on the printing material web surface by means of the inkjet printing device 17 can be detected transversely to the transport direction of the printing material web 14 and / or in the transport direction of the printing material web 14 and can be compared to a corresponding desired position, depending on this Comparison of the operation of the inkjet printing device 17 is affected. Then, when the detected transversely to the transport direction of the printing substrate 14 actual position deviates from the corresponding desired position, the inkjet printing device 17 is displaced in the direction of the double arrow 21 along the traverse 20 transversely to the transport direction of the printing material.
  • the drive signal of the inkjet printing device 17 is modified. As a result, a position control for the impression 19 is provided.
  • the captured with the help of the camera measurement image can be displayed and monitored by an operator, whether the executed processing is done in a desired position, and then, if so, the operator by entering a command the actual position for Target position makes.
  • the inventive method can also be used for automatic print quality control or automatic error detection, in which case the captured using the camera measurement image is preferably evaluated such that the captured image of a pattern recognition, in particular an OCR (Optical Character Recognition) method is subjected can be detected by comparing an actual value obtained with a setpoint pressure artefacts. So it is the inkjet printing with frequent printing artifacts z. For example, uncontrollable individual ink jets, which are noticeable in solid lines or miss lines in the printed image. These two pressure artifacts can, for. B. be recognized by the fact that with a pattern recognition gray values of the printed image are added by columns. A solid line results in very high gray values in the direction of a maximum black value or a minimum white value. In the case of a miss line, very low gray values result in the direction of a maximum white value or a minimum black value. Furthermore, it is possible to monitor whether inkjet printing is actually carried out.
  • OCR Optical Character Recognition

Description

Die Erfindung betrifft ein Verfahren zum Betreiben einer in eine Rollendruckmaschine integrierten Bearbeitungseinrichtung gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a method for operating a processing device integrated in a web press according to the preamble of claim 1.

Rollendruckmaschinen verfügen über mehrere Druckeinheiten zum statischen Bedrucken mindestens einer Bedruckstoffbahnoberfläche mindestens einer Bedruckstoffbahn mit einem für alle Druckexemplare gleichen Druckbild. Jedes Druckexemplar umfasst üblicherweise mehrere Druckseiten. Derartige Druckeinheiten, die dem statischen Bedrucken der oder jeder Bedruckstoffbahn dienen, sind typischerweise als Offset-Druckeinheiten ausgeführt. Ebenso ist es möglich, dass derartige Druckeinheiten als Tiefdruck-Druckeinheiten ausgeführt sind.Web-fed printing presses have a plurality of printing units for static printing of at least one printing substrate web surface of at least one printing substrate web with a printed image that is the same for all printed copies. Each printed copy usually contains several printed pages. Such printing units that serve the static printing of the or each printing material web are typically designed as offset printing units. It is also possible that such printing units are designed as gravure printing units.

In aus der Praxis bekannten Druckmaschinen ist es bereits üblich, zusätzlich zu den Druckeinheiten, die dem statischen Bedrucken der oder jeder Bedruckstoffbahn mit einem für alle Druckexemplare gleichen Druckbild dienen, mindestens eine Bearbeitungseinrichtung vorzusehen, insbesondere um die Druckexemplare zu individualisieren. Bei einer solchen Bearbeitungseinrichtung kann es sich um eine Inkjet-Druckeinrichtung handeln, um mindestens eine Bedruckstoffbahnoberfläche mindestens einer Bedruckstoffbahn mit einem für zumindest einige Druckexemplare variablen Druckbild, also dynamisch, zu bedrucken. Weiterhin kann es sich bei einer solchen Bearbeitungseinrichtung um eine Lackiereinrichtung oder um eine Klebeinrichtung oder um eine Laserschneideinrichtung oder um eine Folientransfereinrichtung oder um eine Perforationseinrichtung oder um eine Eindruckeinrichtung für RFID oder Geruchstoffe oder unsichtbare Tinte oder dergleichen handeln.In printing presses known from practice, it is already customary to provide at least one processing device in addition to the printing units which serve the static printing of the or each printing material web with a printed image which is the same for all printed copies, in particular in order to individualize the printed copies. Such a processing device may be an inkjet printing device in order to print at least one printing substrate web surface of at least one printing material web with a print image that is variable for at least some printed copies, that is to say dynamically. Furthermore, such a processing device can be a painting device or an adhesive device or a laser cutting device or a film transfer device or a perforation device or an imprint device for RFID or odorants or invisible ink or the like.

Aus DE 44 27 978 A1 ist ein Verfahren zur Überwachung einer Nummerierungseinrichtung in einer Druckmaschine bekannt, welches eine selbsttätige ständige Überwachung sowie gezielte Beeinflussung der Arbeitsweise der Nummerierungseinrichtung ermöglicht.Out DE 44 27 978 A1 a method for monitoring a numbering device in a printing machine is known, which allows an automatic constant monitoring and targeted influencing the operation of the numbering device.

Beim Bedrucken einer Bedruckstoffbahn mit einem statischen, für alle Druckexemplare gleichen Druckbild sowie einer Inline-Bearbeitung derselben, insbesondere einem Bedrucken derselben mit einem für zumindest einige Druckexemplare variablen Druckbild, bereitet es Schwierigkeiten, die Bearbeitung mit der Bearbeitungseinrichtung hinsichtlich ihrer Ausführung zu überwachen sowie exakt an einer gewünschten Position auf einer Bedruckstoffbahnoberfläche der Bedruckstoffbahn bzw. an einer gewünschten Position in einer Druckseite durchzuführen. Bislang sind keine Verfahren bekannt, mit denen gewährleistet werden kann, dass die mit der Bearbeitungseinrichtung auszuführende Bearbeitung überwacht und in Transportrichtung der Bedruckstoffbahn sowie quer zur Transportrichtung der Bedruckstoffbahn an der gewünschten Position positioniert wird.When printing a substrate web with a static, same for all copies print image and inline processing the same, in particular a printing of the same for at least some copies print image, it is difficult to monitor the processing with the processing device with regard to their execution as well as exactly to perform a desired position on a printing substrate web surface of the printing substrate or at a desired position in a printed page. To date, no methods are known with which it can be ensured that the processing to be carried out with the processing device is monitored and positioned in the transport direction of the printing material web and transversely to the transport direction of the printing material web at the desired position.

Hiervon ausgehend liegt der vorliegenden Erfindung die Aufgabe zugrunde, ein neuartiges Verfahren zum Betreiben einer in eine Rollendruckmaschine integrierten Bearbeitungseinrichtung zu schaffen. Diese Aufgabe wird durch ein Verfahren gemäß Anspruch 1 gelöst.On this basis, the object of the present invention is to provide a novel method for operating a processing device integrated in a web press. This object is achieved by a method according to claim 1.

Über einen Vergleich einer entsprechenden Soll-Position mit einer Ist-Position der von der Bearbeitungseinrichtung vorgenommenen Bearbeitung ist es möglich, eine Regelung für die von der Bearbeitungseinrichtung vorzunehmende Bearbeitung zu etablieren. So kann sowohl die Position der von der Bearbeitungseinrichtung vorzunehmenden Bearbeitung quer zur Transportrichtung der Bedruckstoffbahn als auch in Transportrichtung der Bedruckstoffbahn geregelt werden. Hierdurch kann die Qualität des hergestellten Druckprodukts gesteigert werden.By comparing a corresponding desired position with an actual position of the processing performed by the processing device, it is possible to establish a regulation for the processing to be carried out by the processing device. Thus, both the position of the processing to be carried out by the processing device can be regulated transversely to the transport direction of the printing material as well as in the transport direction of the printing material. As a result, the quality of the printed product produced can be increased.

Bevorzugte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung. Ein Ausführungsbeispiel der Erfindung wird, ohne hierauf beschränkt zu sein, an Hand der Zeichnung näher erläutert. Dabei zeigt:

Fig. 1:
einen schematisierten Ausschnitt aus einer Rollendruckmaschine in Seitenansicht; und
Fig. 2:
ein Detail aus dem Ausschnitt der Fig. 1 in Draufsicht.
Preferred embodiments of the invention will become apparent from the dependent claims and the description below. An embodiment of the invention will be described, without being limited thereto, with reference to the drawing. Showing:
Fig. 1:
a schematic section of a web press in side view; and
Fig. 2:
a detail from the clipping of the Fig. 1 in plan view.

Nachfolgend wird die Erfindung unter Bezugnahme auf Fig. 1 und 2 für den bevorzugten Anwendungsfall der Integration einer als Inkjet-Druckeinrichtung ausgebildeten Bearbeitungseinrichtung in eine Rollendruckmaschine beschrieben.Hereinafter, the invention with reference to Fig. 1 and 2 for the preferred application, the integration of a trained as an inkjet printing device processing device described in a web press.

Die Erfindung ist jedoch nicht auf diesen Anwendungsfall beschränkt. Vielmehr können im Sinne der Erfindung auch andere Bearbeitungseinrichtungen wie eine Lackiereinrichtung oder eine Klebeinrichtung oder eine Laserschneideinrichtung oder eine Folientransfereinrichtung oder eine Perforationseinrichtung oder eine Eindruckeinrichtung für RFID oder Geruchstoffe oder unsichtbare Tinte oder dergleichen in eine Rollendruckmaschine integriert sein.However, the invention is not limited to this application. Rather, in the context of the invention, other processing devices such as a painting device or an adhesive device or a laser cutting device or a film transfer device or a perforation device or an imprint device for RFID or odors or invisible ink or the like may be integrated into a web press.

Fig. 1 zeigt einen schematisierten Ausschnitt aus einer als Zeitungsdruckmaschine ausgebildeten Rollendruckmaschine im Bereich einer Anordnung 10 aus zwei vertikal übereinander positionierten Druckeinheiten 11, 12. Eine solche Anordnung 10 wird auch als Druckturm bezeichnet. Die beiden Druckeinheiten 11, 12 verfügen jeweils über vier Druckwerke 13, wobei im Bereich jeder Druckeinheit 11, 12 ein bahnförmiger Bedruckstoff 14, der in vertikaler Richtung durch die Druckeinheiten 11, 12 transportiert wird, beidseitig, also im Bereich beider Bedruckstoffbahnoberflächen, bedruckt werden kann. Die Druckeinheiten 11, 12 dienen dem statischen Bedrucken der Bedruckstoffbahn 14 mit einem für alle Druckexemplare gleichen Druckbild. Fig. 1 shows a schematic section of a trained as a newspaper printing press web printing machine in the region of an array 10 of two vertically superposed printing units 11, 12. Such an arrangement 10 is also referred to as a printing tower. The two printing units 11, 12 each have four printing units 13, wherein in the region of each printing unit 11, 12, a web-shaped substrate 14, which is transported in the vertical direction by the printing units 11, 12, on both sides, ie in the range of both printing material web surfaces, can be printed , The printing units 11, 12 are used for static printing of the printing material web 14 with a printed image that is the same for all printed copies.

Jedes Druckexemplar umfasst mehrere Druckseiten. Die Druckwerke 13 der Druckeinheiten 11, 12 sind vorzugsweise als Offset-Druckwerke ausgeführt. Es ist auch möglich, dass dieselben als Tiefdruck-Druckwerke ausgeführt sind.Each printed copy contains several printed pages. The printing units 13 of the printing units 11, 12 are preferably designed as offset printing units. It is also possible that they are designed as gravure printing units.

Nach dem Bedrucken der Bedruckstoffbahn 14 im Bereich der Druckeinheiten 11, 12 ist die Bedruckstoffbahn 14 an einer Umlenkrolle 15 derart umlenkbar, dass die Bedruckstoffbahn 14 im Anschluss an die Umlenkrolle 15 im Wesentlichen in horizontaler Richtung in Richtung des Pfeils 16 transportiert wird, um so die statisch bedruckte Bedruckstoffbahn 14 einer Inkjet-Druckeinrichtung 17 zuzuführen, die dem dynamischen Bedrucken einer Bedruckstoffbahnoberfläche der Bedruckstoffbahn 14 mit einem zumindest für einige Druckexemplare variablen Druckbild dient. Hierdurch ist es möglich, das in den Druckeinheiten gedruckte, statische Druckbild zu individualisieren. Fig. 2 zeigt die im Bereich der Inkjet-Druckeinrichtung 17 zu bedruckende Bedruckstoffbahn 14 in Draufsicht, wobei quer zur Transportrichtung (Pfeil 16) der Bedruckstoffbahn 14 gesehen exemplarisch jeweils vier Druckseiten 18 nebeneinander auf die Bedruckstoffbahn 14 gedruckt sind. Gemäß Fig. 2 wird im Bereich einer dieser nebeneinander positionierten Druckseiten 18 das vorher gedruckte statische Druckbild dieser Druckseite über die Inkjet-Druckeinrichtung 17 mit einem Eindruck 19 dynamisiert.After printing on the printing material web 14 in the region of the printing units 11, 12, the printing material web 14 is deflectable on a deflection roller 15 in such a way that the printing material web 14 is transported in the direction of the arrow 16 following the deflection roller 15 substantially in the horizontal direction so as to convey the printing material web 14 supply static printed substrate web 14 of an inkjet printing device 17, which serves the dynamic printing of a printing substrate web surface of the printing material web 14 with a variable at least for some printed copies print image. This makes it possible to customize the printed in the printing units, static print image. Fig. 2 shows the printing material web 14 to be printed in the area of the inkjet printing device 17 in plan view, with four printing pages 18 being printed side by side on the printing material web 14, as an example, viewed transversely to the transport direction (arrow 16) of the printing material web 14. According to Fig. 2 is in the area of one of these juxtaposed printed pages 18, the previously printed static image of this printed page on the inkjet printing device 17 with an impression 19 dynamized.

Erfindungsgemäß wird mit Hilfe einer der Inkjet-Druckeinrichtung 17 zugeordneten Kamera 22, die in Transportrichtung der Bedruckstoffbahn 14 gesehen stromabwärts der Inkjet-Druckeinrichtung 17 positioniert ist, zumindest der mit Hilfe der Inkjet-Druckeinrichtung 17 auf die Bedruckstoffbahn 14 gedruckte, dynamische Eindruck 19 messtechnisch erfasst. Das mit Hilfe der Kamera 22 erfasste Messbild wird entweder zum Online-Abgleich mit einem Referenzmuster auf einem Bildschirm angezeigt oder zum Offline-Abgleich mit einem Referenzmuster in einen Speicher gespeichert. Ebenso kann das Messbild sowohl angezeigt als auch gespeichert sowie ausgewertet werden.According to the invention, at least the dynamic impression 19 printed with the aid of the inkjet printing device 17 on the printing material web 14 is detected metrologically by means of a camera 22 associated with the inkjet printing device 17, which is positioned downstream of the inkjet printing device 17 in the transport direction of the printing material web 14 , The measurement image acquired with the aid of the camera 22 is either displayed on a screen for online comparison with a reference pattern or stored in a memory for offline comparison with a reference pattern. Likewise, the measurement image can be displayed as well as stored and evaluated.

Ein Ansteuersignal für die Kamera 22 bzw. einen Kamerablitz der Kamera 22 wird aus einem Ansteuersignal der Inkjet-Druckeinrichtung 17 generiert, wobei das Ansteuersignal für die Kamera 22 bzw. den Kamerablitz aus dem Ansteuersignal für die Inkjet-Druckeinrichtung 17, aus der Geschwindigkeit der Bedruckstoffbahn 14 und aus dem Abstand zwischen der Inkjet-Druckeinrichtung 17 und der Kamera 22 in Transportrichtung der Bedruckstoffbahn 14 ermittelt wird.A drive signal for the camera 22 or a camera flash of the camera 22 is generated from a drive signal of the inkjet printing device 17, wherein the drive signal for the camera 22 or the camera flash from the drive signal for the inkjet printing device 17, from the speed of the printing material web 14 and from the distance between the inkjet printing device 17 and the camera 22 in the transport direction of the printing material web 14 is determined.

Im Sinne der hier vorliegenden Erfindung ist es möglich, dass die Kamera 22 jeden mit Hilfe der Inkjet-Druckeinrichtung 17 vorgenommenen dynamischen Eindruck 19 erfasst. Ebenso ist es möglich, dass lediglich jeder n-te Eindruck 19 mit Hilfe der Kamera 22 messtechnisch erfasst wird.For the purposes of the present invention, it is possible for the camera 22 to detect each dynamic impression 19 made with the aid of the inkjet printing device 17. It is also possible that only every nth impression 19 is detected metrologically by means of the camera 22.

Erfindungsgemäß wird zusätzlich zu dem mit Hilfe der Inkjet-Druckeinrichtung 17 an der Bedruckstoffoberfläche der Bedruckstoffbahn 14 ausgeführten Eindruck 19 eine Umgebung des Eindrucks 19 und damit die in den Druckwerken 13 der Rollendruckmaschine statisch bedruckte Bedruckstoffbahnoberfläche der Bedruckstoffbahn 14 abschnittsweise messtechnisch erfasst. Hierzu dient vorzugsweise die der Inkjet-Druckeinrichtung 17 zugeordnete Kamera 22, die dann die unmittelbare Umgebung des Eindrucks 19 mit erfasst. Alternativ kann eine separate Kamera zum Einsatz kommen, die an derselben Traverse 20 oder einer separaten Traverse quer zur Transportrichtung der Bedruckstoffbahn verfahrbar gelagert ist.According to the invention, in addition to the impression 19 carried out with the aid of the inkjet printing device 17 on the printing material surface of the printing material web 14, an environment of the impression 19 and thus the printing surface 13 of the printing material web 14 that is statically printed in the printing units 13 of the web press are detected in sections by way of measurement. For this purpose, preferably the inkjet printing device 17 associated camera 22, which then detects the immediate vicinity of the impression 19 with. Alternatively, a separate camera can be used, which is movably mounted transversely to the transport direction of the printing material web on the same traverse 20 or a separate traverse.

Hierbei ist dann quer zur Transportrichtung der Bedruckstoffbahn 14 und/oder in Transportrichtung der Bedruckstoffbahn 14 jeweils eine Ist-Position des mit Hilfe der Inkjet-Druckeinrichtung 17 an der Bedruckstoffbahnoberfläche ausgeführten Eindrucks 19 erfassbar und mit einer entsprechenden Soll-Position vergleichbar, wobei abhängig von diesem Vergleich der Betrieb der Inkjet-Druckeinrichtung 17 beeinflusst wird. Dann, wenn die quer zur Transportrichtung der Bedruckstoffbahn 14 erfasste Ist-Position von der entsprechenden Soll-Position abweicht, wird die Inkjet-Druckeinrichtung 17 in Richtung des Doppelpfeils 21 entlang der Traverse 20 quer zur Transportrichtung der Bedruckstoffbahn verlagert. Dann, wenn in Transportrichtung der Bedruckstoffbahn 14 gesehen, die Ist-Position des Eindrucks 19 von der entsprechenden Soll-Position abweicht, wird das Ansteuersignal der Inkjet-Druckeinrichtung 17 modifiziert. Hierdurch wird eine Positionsregelung für den Eindruck 19 bereitgestellt.In this case, an actual position of the impression 19 carried out on the printing material web surface by means of the inkjet printing device 17 can be detected transversely to the transport direction of the printing material web 14 and / or in the transport direction of the printing material web 14 and can be compared to a corresponding desired position, depending on this Comparison of the operation of the inkjet printing device 17 is affected. Then, when the detected transversely to the transport direction of the printing substrate 14 actual position deviates from the corresponding desired position, the inkjet printing device 17 is displaced in the direction of the double arrow 21 along the traverse 20 transversely to the transport direction of the printing material. Then, when viewed in the transport direction of the printing substrate 14, the actual position of the indentation 19 deviates from the corresponding desired position, the drive signal of the inkjet printing device 17 is modified. As a result, a position control for the impression 19 is provided.

Beim Einrichten des Druckprozesses kann das mit Hilfe der Kamera erfasste Messbild angezeigt und von einer Bedienperson überwacht werden, ob die ausgeführte Bearbeitung an einer gewünschten Position erfolgt, wobei dann, wenn dies der Fall ist, die Bedienperson durch Eingabe eines Kommandos die Ist-Position zur Soll-Position macht.When setting up the printing process, the captured with the help of the camera measurement image can be displayed and monitored by an operator, whether the executed processing is done in a desired position, and then, if so, the operator by entering a command the actual position for Target position makes.

Das erfindungsgemäße Verfahren kann auch zur automatischen Druckqualitätskontrolle bzw. automatischen Fehlererkennung verwendet werden, wobei dann das mit Hilfe der Kamera erfasste Messbild vorzugsweise derart ausgewertet wird, dass das erfasste Messbild einer Mustererkennung, insbesondere einem OCR (Optical Character Recognition) Verfahren, unterzogen wird, wobei durch Vergleich eines hierbei gewonnen Istwerts mit einem Sollwert Druckartefakte erkannt werden können. So handelt es sich beim Inkjet-Druck bei häufigen Druckartefakten z. B. um nicht kontrollierbare einzelne Tintenstrahlen, die sich in durchgezognen Linien oder Fehllinien im Druckbild bemerkbar machen. Diese beiden Druckartefakte können z. B. dadurch erkannt werden, dass mit einer Mustererkennung Grauwerte des Druckbilds spaltenweise aufaddiert werden. Bei einer durchgezogenen Linie ergeben sich sehr hohe Grauwert in Richtung eines maximalen Schwarzwerts bzw. eines minimalen Weißwerts. Bei einer Fehllinien ergeben sich sehr geringe Grauwert in Richtung eines maximalen Weißwerts bzw. eines minimalen Schwarzwerts. Weiterhin kann so überwacht werden, ob der Inkjet-Druck überhaupt vorgenommen wird.The inventive method can also be used for automatic print quality control or automatic error detection, in which case the captured using the camera measurement image is preferably evaluated such that the captured image of a pattern recognition, in particular an OCR (Optical Character Recognition) method is subjected can be detected by comparing an actual value obtained with a setpoint pressure artefacts. So it is the inkjet printing with frequent printing artifacts z. For example, uncontrollable individual ink jets, which are noticeable in solid lines or miss lines in the printed image. These two pressure artifacts can, for. B. be recognized by the fact that with a pattern recognition gray values of the printed image are added by columns. A solid line results in very high gray values in the direction of a maximum black value or a minimum white value. In the case of a miss line, very low gray values result in the direction of a maximum white value or a minimum black value. Furthermore, it is possible to monitor whether inkjet printing is actually carried out.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1010
Anordnungarrangement
1111
Druckeinheitprinting unit
1212
Druckeinheitprinting unit
1313
Druckwerkprinting unit
1414
Bedruckstoffsubstrate
1515
Umlenkrolleidler pulley
1616
Pfeilarrow
1717
Inkjet-DruckeinrichtungInkjet printing device
1818
Druckseitepressure side
1919
Positionposition
2020
Traversetraverse
2121
Doppelpfeildouble arrow
2222
Kameracamera

Claims (10)

  1. A method for operating an inkjet printing device integrated in a reel-fed printing press for the dynamic printing of at least one substrate web surface of a substrate web with a print image that is variable for at least some print copies in order to position the print image to be carried out with the inkjet printing device in a desired position on a substrate web surface of the substrate or in a desired position in at least one print page of the print copies, wherein with the help of a camera assigned to the inkjet printing device at least the print image carried out on the substrate web surface of the substrate web with the help of the inkjet printing device is captured by measurement, wherein a measurement image detected with the help of the camera is displayed and/or stored and/or evaluated, characterized in that in addition to the print image carried out on the substrate web surface of the substrate web with the help of the inkjet printing device a surroundings of this print image and thus the substrate web surface of the substrate web statically printed in printing couples of the reel-fed printing press is captured by measurement in sections, in transport direction of the substrate web an actual position of the print image carried out on the substrate web surface of the substrate web with the help of the inkjet printing device is detected and compared with a corresponding set point position, and in that dependent on this comparison for controlling the position of the print image carried out on the substrate web surface of the substrate web with the help of the inkjet printing device the activation signal of the inkjet printing device is modified.
  2. The method according to Claim 1, characterized in that the measurement image detected with the help of the camera is displayed either for the online comparison with a reference pattern together with a reference pattern or without the reference pattern and if appropriate evaluated and/or stored for offline comparison.
  3. The method according to Claim 1 or 2, characterized in that an activation signal for the camera and/or a camera flash is determined from an activation signal of the inkjet printing device, from the speed of the substrate web and the distance between the inkjet printing device and the camera.
  4. The method according to any one of the Claims 1 to 3, characterized in that the camera of each or each n-th print image carried out on the substrate web surface of the substrate web with the help of the inkjet printing device is captured by measurement.
  5. The method according to any one of the Claims 1 to 4, characterized in that the immediate surroundings of the print image carried out on the substrate web surface of the substrate web with the help of the inkjet printing device is detected with the same camera.
  6. The method according to any one of the Claims 1 to 4, characterized in that the immediate surroundings of the print image embodied with the help of the inkjet printing device is detected with a separate camera.
  7. The method according to any one of the Claims 1 to 6, characterized in that in the process transversely to the transport direction of the substrate web an actual position of the print image carried out on the substrate web surface of the substrate web with the help of the inkjet printing device is detected and compared with a corresponding set point position, and in that dependent on this comparison the inkjet printing device is repositioned transversely to the transport direction of the substrate web.
  8. The method according to any one of the Claims 1 to 7, characterized in that during the setting up the measurement image detected with the help of the camera is displayed and monitored by an operating person if the print image carried out by the inkjet printing device takes place in a desired position wherein in particular when this is the case the operating person turns the actual position into the set point position by inputting a command.
  9. The method according to any one of the Claims 1 to 8, characterized in that the measurement image detected with the help of the camera is evaluated for the automatic print quality control or automatic defect recognition.
  10. The method according to Claim 9, characterized in that for this purpose the detected measurement image is evaluated with pattern recognition, in particular an OCR (optical character recognition) method, wherein by comparison of an actual value gained in the process with a set point value, print artefacts are detected.
EP09158872.3A 2008-04-29 2009-04-27 Method for operating a processing device integrated in a web-fed printing press Not-in-force EP2113384B1 (en)

Applications Claiming Priority (1)

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DE102008021447A DE102008021447A1 (en) 2008-04-29 2008-04-29 Method for operating a processing device integrated in a web press

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EP2113384B1 true EP2113384B1 (en) 2015-07-01

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DE102008059759B4 (en) 2008-12-01 2010-09-23 Hell Gravure Systems Gmbh & Co. Kg Method for pre-checking a multicolored printed product to be printed by means of several printing forms with different printing inks

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US4827315A (en) * 1986-12-16 1989-05-02 Larry Wolfberg Printing press
DE4110564C2 (en) * 1991-03-30 1993-12-16 Licentia Gmbh Device for register adjustment between a first and at least one subsequently applied sample of a material web
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DE10254836A1 (en) * 2002-11-22 2004-06-17 Windmöller & Hölscher Kg Method and device for regulating the register of a printing press
DE102005012913A1 (en) * 2004-03-23 2005-10-13 Koenig & Bauer Ag Press for printing, with at least one inking mechanism, has control device altering setting of amount of ink to be applied, depending on alteration in other zone
US8231202B2 (en) * 2004-04-30 2012-07-31 Fujifilm Dimatix, Inc. Droplet ejection apparatus alignment
DE102004034431A1 (en) * 2004-07-15 2006-02-09 Windmöller & Hölscher Kg Register pre-control for speed change
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EP1894728A1 (en) * 2006-09-01 2008-03-05 BCS machine vision GmbH Controlling the working condition of inkjet printheads in digital printing machines

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EP2113384A1 (en) 2009-11-04

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