EP1995067A2 - Method for operating a printing press - Google Patents

Method for operating a printing press Download PDF

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Publication number
EP1995067A2
EP1995067A2 EP08154856A EP08154856A EP1995067A2 EP 1995067 A2 EP1995067 A2 EP 1995067A2 EP 08154856 A EP08154856 A EP 08154856A EP 08154856 A EP08154856 A EP 08154856A EP 1995067 A2 EP1995067 A2 EP 1995067A2
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EP
European Patent Office
Prior art keywords
printing
substrate
basis
printing material
measured
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Granted
Application number
EP08154856A
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German (de)
French (fr)
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EP1995067B1 (en
EP1995067A3 (en
Inventor
Sarayut Leeratanaphanit
Jürgen Schölzig
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Manroland Sheetfed GmbH
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Manroland AG
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Publication of EP1995067A3 publication Critical patent/EP1995067A3/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

Definitions

  • the invention relates to a method for operating a printing machine, in particular an offset printing press, according to the preamble of claim 1.
  • a sheet-shaped printing material in the form of so-called printing sheet, is moved through a plurality of printing units in order to apply a printed image to the sheet-shaped printing material.
  • the printing units use printing plates, typically printing plates, which are produced with consideration of prepress-based image data and taking into account substrate data. This is because the printing substrate used has an effect on the printed image produced during printing, which is why data about the printing substrate are already taken into account during the printing plate production or in the prepress stage.
  • the division of the types of printing material according to certain properties namely the color of unprinted sections of the substrate, after the gloss of unprinted sections of the substrate, after the dot gain or the printing characteristics of the printing inks when printing, after the reproduced in the color gamut, and after showing a printed image on the substrate during printing.
  • the color gamut that can be reproduced in print is also called gamut, and show through is also called opacity.
  • the coloration in the print may shift to the point where waste is printed. Under certain circumstances, the complete print run is unusable and must be destroyed. This causes high costs. So far, there are no procedures to operate a printing machine, which take this problem into account.
  • the present invention has the object to provide a novel method for operating a printing press, in particular an offset printing press.
  • At least one unprinted and / or at least one printed section of the printing material is measured, in which at least one determined actual value is compared with at least one printing material-dependent setpoint value to determine on the basis of the comparison whether the substrate actually used corresponds to the printing material in terms of its properties or printing material data on the basis of which the printing plates used for printing are made.
  • the method according to the invention it is proposed for the first time to measure at least one unprinted and / or at least one printed section of a printing material, and in this case to determine actual values which are compared with printing material-dependent desired values. Based on the comparison, it can be determined whether the substrate actually used for printing corresponds to the substrate on the basis of which properties in the prepress stage printing plates have been produced. Optionally, based on this comparison, a printing process may be aborted to avoid printing waste.
  • Fig. 1 shows a highly schematic representation of a sheet-fed press 10, wherein the sheet-fed press 10 has a feeder 11, a boom 12 and a plurality of printing units 13 positioned between the feeder 11 and the boom 12.
  • the printing units 13 are preferably designed as offset printing units and are used for the application of partial printing images on the substrate to be printed.
  • each a forme cylinder 14 a transfer cylinder 15 and a counter-pressure cylinder 16 is shown, wherein on the forme cylinders 14 printing plates and on the transfer cylinders 15 are positioned transfer forms.
  • the printing plates are usually printing plates and the transfer forms to blankets, which is why the forme cylinder 14 also referred to as a plate cylinder and the transfer cylinder 15 as a blanket cylinder.
  • At least one unprinted section and / or at least one printed section of the printing material are measured, in which case at least one determined actual value is compared with at least one printing material-dependent setpoint value. On the basis of the comparison, it is determined whether the substrate actually used for printing corresponds in terms of its properties or substrate data to the substrate on the basis of which the printing plates used for printing were produced in the prepress.
  • an error message or warning message is automatically generated and signaled.
  • the printing press is stopped or interrupted the printing of the support.
  • regulation can be effected by influencing pressure parameters in order to minimize the color deviations thus caused.
  • Fig. 1 shows by way of example a color measuring device 17 for unprinted sections of the printing material, which is positioned upstream of the printing units 13 and therefore detects the printing material prior to printing thereof by measurement.
  • the measuring device 17 for measuring the or each unprinted portion of the printing material measures the same inline or online within the printing machine during the printing process or during the print production.
  • Fig. 1 a measuring device 18, which serves to measure at least one printed portion of the printing material, wherein the or each printed portion is measured by means of a color measuring device.
  • Fig. 1 is the measuring device 18 downstream of the printing units 13 integrated into the sheet-fed press, so that the measurement of the or each printed portion after printing of the substrate takes place, again inline or online during the print production.
  • Actual values determined by means of the or each measuring device 17, 18 are transmitted to a control device 19, in which the determined actual values are compared with reference values dependent on the printing material.
  • Each determined actual value is compared in the control device 19 with a plurality of setpoint values stored for different types of substrates having different properties or substrate data in order to determine on the basis of the comparison whether the substrate actually used corresponds in terms of its properties or substrate data to the substrate on the basis of which for printing used printing plates have been produced.
  • This comparison can take place with the aid of software integrated into the control device 19.
  • this comparison software can also be integrated directly into the or each measuring device 17, 18.
  • the measurement of the or each unprinted portion and the measurement of the or each printed portion by means of a color measuring device namely a spectral color measuring device
  • the actual values in the so-called L * a * b color space is determined.
  • These actual values in the L * a * b color space are compared with set values in the L * a * b color space, namely such that each actual value is compared with a plurality of desired values stored for different types of substrate.
  • it is then determined whether the printing stock actually used corresponds in terms of its properties or printing material data to that printing substrate on the basis of which printing plates have been exposed in the prepress stage.
  • the measurement of the or each unprinted portion and the measurement of the or each printed portion by means of the color measuring device preferably takes place according to standards.
  • a black measuring pad is positioned opposite to the color measuring device on the other side of the printing substrate and thus along the transport path of the printing material through the printing press.
  • the resulting color deviation can be compensated by regulating process parameters.
  • the printing process is preferably aborted in order to avoid the printing of waste.
  • the invention can be used in sheet-fed printing presses and in web-fed printing presses.
  • the invention can be used in the one-sided and two-sided printing of substrates, the two-sided printing is referred to in sheetfed presses as perfecting, even if the substrate has different properties on both sides. Then, correspondingly different setpoints are stored for the two sides.

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  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Printing Methods (AREA)

Abstract

The method involves printing an arc-shaped or web-shaped printing substrate in a printing unit (13) of a sheet printing machine (10) i.e. offset sheet printing machine, with a help of printing plates. A plain and/or printed section of the printing substrate is measured. A determined actual value is compared with a print substrate-dependent desired value in order to determine whether the actually used printing substrate is equivalent with respect to characteristics and/or printing substrate data based on comparison, such that one of the printing plates used for printing is manufactured.

Description

Die Erfindung betrifft ein Verfahren zum Betreiben einer Druckmaschine, insbesondere einer Offset-Druckmaschine, gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a method for operating a printing machine, in particular an offset printing press, according to the preamble of claim 1.

In Bogendruckmaschinen wird ein bogenförmiger Bedruckstoff, in Form so genannter Druckbogen, durch mehrere Druckwerke bewegt, um auf den bogenförmigen Bedruckstoff ein Druckbild aufzutragen. Zum Drucken finden in den Druckwerken Druckformen, typischerweise Druckplatten, Verwendung, die unter Berücksichtigung von druckvorstufebasierten Bilddaten sowie unter Berücksichtigung von Bedruckstoffdaten hergestellt werden. So hat nämlich der verwendete Bedruckstoff Auswirkungen auf das beim Drucken erzeugte Druckbild, weshalb Daten über den Bedruckstoff bereits bei der Druckformherstellung bzw. in der Druckvorstufe berücksichtigt werden. Im Offsetdruck erfolgt die Einteilung der Bedruckstofftypen nach bestimmten Eigenschaften, nämlich nach der Farbe von unbedruckten Abschnitten des Bedruckstoffs, nach dem Glanz von unbedruckten Abschnitten des Bedruckstoffs, nach der Tonwertzunahme bzw. den Druckkennlinien der Druckfarben beim Bedrucken, nach dem im Druck wiedergebbaren Farbumfang, sowie nach dem Durchscheinen eines beim Drucken auf den Bedruckstoff aufgetragenen Druckbilds. Der Farbumfang, der im Druck wiedergegeben werden kann, wird auch als Gamut und das Durchscheinen wird auch als Opazität bezeichnet.In sheet-fed presses, a sheet-shaped printing material, in the form of so-called printing sheet, is moved through a plurality of printing units in order to apply a printed image to the sheet-shaped printing material. For printing, the printing units use printing plates, typically printing plates, which are produced with consideration of prepress-based image data and taking into account substrate data. This is because the printing substrate used has an effect on the printed image produced during printing, which is why data about the printing substrate are already taken into account during the printing plate production or in the prepress stage. In offset printing, the division of the types of printing material according to certain properties, namely the color of unprinted sections of the substrate, after the gloss of unprinted sections of the substrate, after the dot gain or the printing characteristics of the printing inks when printing, after the reproduced in the color gamut, and after showing a printed image on the substrate during printing. The color gamut that can be reproduced in print is also called gamut, and show through is also called opacity.

Wird beim tatsächlichen Bedrucken des Bedruckstoffs in der Druckmaschine ein Bedruckstoff verwendet, der von dem Bedruckstoff, auf Grundlage dessen Eigenschaften bzw. Daten die Druckformen hergestellt sind, abweicht, so kann sich die Färbung im Druck soweit verschieben, dass Makulatur gedruckt wird. Unter Umständen ist die komplette Druckauflage unbrauchbar und muss vernichtet werden. Dies verursacht hohe Kosten. Bislang sind keine Verfahren zum Betreiben einer Druckmaschine bekannt, die diesem Problem Rechnung tragen.If the actual printing of the printing substrate in the printing press uses a printing material that is different from the printing substrate on the basis of which the printing plates are made, the coloration in the print may shift to the point where waste is printed. Under certain circumstances, the complete print run is unusable and must be destroyed. This causes high costs. So far, there are no procedures to operate a printing machine, which take this problem into account.

Hiervon ausgehend liegt der vorliegenden Erfindung die Aufgabe zugrunde, ein neuartiges Verfahren zum Betreiben einer Druckmaschine, insbesondere einer Offset-Druckmaschine, zu schaffen.On this basis, the present invention has the object to provide a novel method for operating a printing press, in particular an offset printing press.

Diese Aufgabe wird durch ein Verfahren gemäß Anspruch 1 gelöst.This object is achieved by a method according to claim 1.

Erfindungsgemäß wird mindestens ein unbedruckter und/oder mindestens ein bedruckter Abschnitt des Bedruckstoffs vermessen, wobei hierbei mindestens ein ermittelter Istwert mit mindestens einem bedruckstoffabhängigen Sollwert verglichen wird, um auf Grundlage des Vergleichs festzustellen, ob der tatsächlich verwendete Bedruckstoff hinsichtlich seiner Eigenschaften bzw. Bedruckstoffdaten demjenigen Bedruckstoff entspricht, auf Grundlage dessen die zum Drucken verwendeten Druckformen hergestellt sind.According to the invention, at least one unprinted and / or at least one printed section of the printing material is measured, in which at least one determined actual value is compared with at least one printing material-dependent setpoint value to determine on the basis of the comparison whether the substrate actually used corresponds to the printing material in terms of its properties or printing material data on the basis of which the printing plates used for printing are made.

Mit dem erfindungsgemäßen Verfahren wird erstmals vorgeschlagen, mindestens einen unbedruckten und/oder mindestens einen bedruckten Abschnitt eines Bedruckstoffs zu vermessen, und hierbei Istwerte zu ermitteln, die mit bedruckstoffabhängigen Sollwerten verglichen werden. Auf Basis des Vergleichs kann festgestellt werden, ob der tatsächlich zum Drucken verwendete Bedruckstoff dem Bedruckstoff entspricht, auf Basis dessen Eigenschaften in der Druckvorstufe Druckformen hergestellt worden sind. Gegebenenfalls kann auf Basis dieses Vergleichs ein Druckprozess abgebrochen werden, um das Drucken von Makulatur zu vermeiden.With the method according to the invention, it is proposed for the first time to measure at least one unprinted and / or at least one printed section of a printing material, and in this case to determine actual values which are compared with printing material-dependent desired values. Based on the comparison, it can be determined whether the substrate actually used for printing corresponds to the substrate on the basis of which properties in the prepress stage printing plates have been produced. Optionally, based on this comparison, a printing process may be aborted to avoid printing waste.

Bevorzugte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung.Preferred embodiments of the invention will become apparent from the dependent claims and the description below.

Ausführungsbeispiele der Erfindung werden, ohne hierauf beschränkt zu sein, an Hand der Zeichnung näher erläutert. Dabei zeigt:

  • Fig. 1: eine schematisierte Darstellung einer als Bogendruckmaschine ausgebildeten Druckmaschine zur Verdeutlichung des erfindungsgemäßen Verfahrens zum Betreiben einer Druckmaschine.
Embodiments of the invention will be described, without being limited thereto, with reference to the drawings. Showing:
  • Fig. 1 : A schematic representation of a trained as a sheet-fed press printing machine to illustrate the inventive method for operating a printing press.

Fig. 1 zeigt eine stark schematisierte Darstellung einer Bogendruckmaschine 10, wobei die Bogendruckmaschine 10 einen Anleger 11, einen Ausleger 12 und mehrere zwischen dem Anleger 11 und dem Ausleger 12 positionierte Druckwerke 13 aufweist. Die Druckwerke 13 sind vorzugsweise als Offset-Druckwerke ausgebildet und dienen dem Auftragen von Teildruckbildern auf den zu bedruckenden Bedruckstoff. Fig. 1 shows a highly schematic representation of a sheet-fed press 10, wherein the sheet-fed press 10 has a feeder 11, a boom 12 and a plurality of printing units 13 positioned between the feeder 11 and the boom 12. The printing units 13 are preferably designed as offset printing units and are used for the application of partial printing images on the substrate to be printed.

Von den Druckwerken 13 sind jeweils ein Formzylinder 14, ein Übertragungszylinder 15 sowie ein Gegendruckzylinder 16 dargestellt, wobei auf den Formzylindern 14 Druckformen und auf den Übertragungszylindern 15 Übertragungsformen positioniert sind. Bei den Druckformen handelt es sich üblicherweise um Druckplatten und bei den Übertragungsformen um Gummitücher, weshalb die Formzylinder 14 auch als Plattenzylinder und die Übertragungszylinder 15 auch als Gummizylinder bezeichnet werden.Of the printing units 13 are each a forme cylinder 14, a transfer cylinder 15 and a counter-pressure cylinder 16 is shown, wherein on the forme cylinders 14 printing plates and on the transfer cylinders 15 are positioned transfer forms. In the printing plates are usually printing plates and the transfer forms to blankets, which is why the forme cylinder 14 also referred to as a plate cylinder and the transfer cylinder 15 as a blanket cylinder.

Die auf den Formzylindern 14 positionierten Druckformen, die zum Drucken verwendet werden, werden in einer sogenannten Druckvorstufe auf Basis von Druckbilddaten sowie auf Basis von Daten bzw. Eigenschaften des zu bedruckenden Bedruckstoffs hergestellt. Bei den Daten bzw. Eigenschaften des Bedruckstoffs, die bei der Druckformherstellung berücksichtigt werden sollen, handelt es sich insbesondere um

  • die Farbe von unbedruckten Abschnitten des Bedruckstoffs,
  • den Glanz von unbedruckten Abschnitten des Bedruckstoffs,
  • die Tonwertzunahmen bzw. die Druckkennlinien der Druckfarben beim Drucken,
  • den wiedergebbaren Farbumfang beim Drucken, den so genannten Gamut, und
  • das Durchscheinen eines Druckbilds durch den Bedruckstoff, die so genannte Opazität.
The printing forms positioned on the forme cylinders 14 used for printing are produced in a so-called prepress stage on the basis of print image data and on the basis of data or properties of the printing material to be printed. The data or properties of the printing material which are to be taken into account in the printing forme production are in particular:
  • the color of unprinted sections of the substrate,
  • the gloss of unprinted sections of the substrate,
  • the tonal value increases or the printing characteristics of the printing inks during printing,
  • the reproducible color gamut when printing, the so-called gamut, and
  • the transparency of a printed image through the substrate, the so-called opacity.

Im Sinne der hier vorliegenden Erfindung werden mindestens ein unbedruckter Abschnitt und/oder mindestens ein bedruckter Abschnitt des Bedruckstoffs vermessen, wobei hierbei mindestens ein ermittelter Istwert mit mindestens einem bedruckstoffabhängigen Sollwert verglichen wird. Auf Basis des Vergleichs wird festgestellt, ob der tatsächlich zum Bedrucken verwendete Bedruckstoff hinsichtlich seiner Eigenschaften bzw. Bedruckstoffdaten demjenigen Bedruckstoff entspricht, auf Grundlage dessen in der Druckvorstufe die zum Drucken verwendeten Druckformen hergestellt worden sind.For the purposes of the present invention, at least one unprinted section and / or at least one printed section of the printing material are measured, in which case at least one determined actual value is compared with at least one printing material-dependent setpoint value. On the basis of the comparison, it is determined whether the substrate actually used for printing corresponds in terms of its properties or substrate data to the substrate on the basis of which the printing plates used for printing were produced in the prepress.

Für den Fall, dass festgestellt wird, dass der tatsächlich verwendet Bedruckstoff von demjenigen Bedruckstoff, auf Grundlage dessen die zum Drucken verwendeten Druckformen hergestellt worden sind, abweicht, wird automatisch eine Fehlermeldung bzw. Warnmeldung generiert und signalisiert. Bei großen Abweichungen in der Charakteristik zwischen dem tatsächlich verwendeten Bedruckstoff und dem in der Druckvorstufe angenommenen Bedruckstoff wird gegebenenfalls die Druckmaschine angehalten bzw. das Drucken der Auflage unterbrochen. Bei relativ kleinen Abweichungen hingegen kann durch Beeinflussung von Druckparametern eine Regelung erfolgen, um die so bedingten Farbabweichungen zu minimieren.In the event that it is determined that the substrate actually used differs from the substrate on the basis of which the printing plates used for printing have been deviated, an error message or warning message is automatically generated and signaled. For large deviations in the characteristic between the actual substrate used and the presupposed in the prepress substrate if necessary, the printing press is stopped or interrupted the printing of the support. By contrast, with relatively small deviations, regulation can be effected by influencing pressure parameters in order to minimize the color deviations thus caused.

Dann, wenn mindestens ein unbedruckter Abschnitt des Bedruckstoffs vermessen wird, erfolgt die Vermessung des oder jeden unbedruckten Abschnitts mit Hilfe einer Farbmesseinrichtung und/oder mit Hilfe einer Glanzmesseinrichtung und/oder mit Hilfe einer Opazitätsmesseinrichtung. Fig. 1 zeigt exemplarisch eine Farbmesseinrichtung 17 für unbedruckte Abschnitte des Bedruckstoffs, die stromaufwärts der Druckwerke 13 positioniert ist und demnach den Bedruckstoff vor dem Bedrucken derselben messtechnisch erfasst. Die Messeinrichtung 17 zum Vermessen des oder jeden unbedruckten Abschnitts des Bedruckstoffs vermisst denselben inline bzw. online innerhalb der Druckmaschine während des Druckprozesses bzw. während der Druckproduktion.Then, when at least one unprinted portion of the printing material is measured, the measurement of the or each unprinted portion is carried out by means of a color measuring device and / or by means of a gloss meter and / or with the aid of an opacity meter. Fig. 1 shows by way of example a color measuring device 17 for unprinted sections of the printing material, which is positioned upstream of the printing units 13 and therefore detects the printing material prior to printing thereof by measurement. The measuring device 17 for measuring the or each unprinted portion of the printing material measures the same inline or online within the printing machine during the printing process or during the print production.

Weiterhin zeigt Fig. 1 eine Messeinrichtung 18, die dem Vermessen mindestens eines bedruckten Abschnitts des Bedruckstoffs dient, wobei der oder jeder bedruckte Abschnitt mit Hilfe einer Farbmesseinrichtung vermessen wird.Further shows Fig. 1 a measuring device 18, which serves to measure at least one printed portion of the printing material, wherein the or each printed portion is measured by means of a color measuring device.

Gemäß Fig. 1 ist die Messeinrichtung 18 stromabwärts der Druckwerke 13 in die Bogendruckmaschine integriert, so dass das Vermessen des oder jedes bedruckten Abschnitts nach dem Bedrucken des Bedruckstoffs erfolgt, und zwar wiederum inline bzw. online während der Druckproduktion.According to Fig. 1 is the measuring device 18 downstream of the printing units 13 integrated into the sheet-fed press, so that the measurement of the or each printed portion after printing of the substrate takes place, again inline or online during the print production.

Mittels der oder jeder Messeinrichtung 17, 18 ermittelte Istwerte werden an eine Steuerungseinrichtung 19 übermittelt, in welcher die ermittelten Istwerte mit bedruckstoffabhängigen Sollwerten verglichen werden. Jeder ermittelte Istwert wird in der Steuerungseinrichtung 19 mit mehreren, für unterschiedliche Bedruckstofftypen mit unterschiedlichen Eigenschaften bzw. Bedruckstoffdaten hinterlegten Sollwerten verglichen, um auf Grundlage des Vergleichs festzustellen, ob der tatsächlich verwendete Bedruckstoff hinsichtlich seiner Eigenschaften bzw. Bedruckstoffdaten demjenigen Bedruckstoff entspricht, auf Grundlage dessen die zum Drucken verwendeten Druckformen hergestellt worden sind.Actual values determined by means of the or each measuring device 17, 18 are transmitted to a control device 19, in which the determined actual values are compared with reference values dependent on the printing material. Each determined actual value is compared in the control device 19 with a plurality of setpoint values stored for different types of substrates having different properties or substrate data in order to determine on the basis of the comparison whether the substrate actually used corresponds in terms of its properties or substrate data to the substrate on the basis of which for printing used printing plates have been produced.

Dieser Vergleich kann mit Hilfe von in die Steuerungseinrichtung 19 integrierter Software erfolgen. Alternativ kann diese Vergleichssoftware auch unmittelbar in die oder jede Messeinrichtung 17, 18 integriert sein.This comparison can take place with the aid of software integrated into the control device 19. Alternatively, this comparison software can also be integrated directly into the or each measuring device 17, 18.

Vorzugsweise erfolgt das Vermessen des oder jedes unbedruckten Abschnitts sowie das Vermessen des oder jedes bedruckten Abschnitts mit Hilfe einer Farbmesseinrichtung, nämlich einer spektralen Farbmesseinrichtung, die Istwerte im sogenannten L*a*b-Farbraum ermittelt. Diese Istwerte im L*a*b-Farbraum werden mit Sollwerten im L*a*b-Farbraum verglichen, nämlich derart, dass jeder Istwert mit mehreren für unterschiedliche Bedruckstofftypen hinterlegten Sollwerten verglichen wird. Auf Basis dieses Vergleichs wird dann festgestellt, ob der tatsächlich verwendete Bedruckstoff hinsichtlich seiner Eigenschaften bzw. Bedruckstoffdaten demjenigen Bedruckstoff entspricht, auf Grundlage dessen in der Druckvorstufe Druckplatten belichtet worden sind.Preferably, the measurement of the or each unprinted portion and the measurement of the or each printed portion by means of a color measuring device, namely a spectral color measuring device, the actual values in the so-called L * a * b color space is determined. These actual values in the L * a * b color space are compared with set values in the L * a * b color space, namely such that each actual value is compared with a plurality of desired values stored for different types of substrate. On the basis of this comparison, it is then determined whether the printing stock actually used corresponds in terms of its properties or printing material data to that printing substrate on the basis of which printing plates have been exposed in the prepress stage.

Das Vermessen des oder jedes unbedruckten Abschnitts sowie das Vermessen des oder jedes bedruckten Abschnitts mit Hilfe der Farbmesseinrichtung, nämlich der spektralen Farbmesseinrichtung, erfolgt vorzugsweise normgerecht. Hierzu ist gegenüberliegend zur Farbmesseinrichtung auf der anderen Seite des Bedruckstoffs und damit entlang des Transportwegs des Bedruckstoffs durch die Druckmaschine eine schwarze Messunterlage positioniert.The measurement of the or each unprinted portion and the measurement of the or each printed portion by means of the color measuring device, namely the spectral color measuring device, preferably takes place according to standards. For this purpose, a black measuring pad is positioned opposite to the color measuring device on the other side of the printing substrate and thus along the transport path of the printing material through the printing press.

Mit Hilfe des erfindungsgemäßen Verfahrens kann inline bzw. online zur Druckproduktion überprüft werden, ob ein zum Drucken tatsächlich verwendeter Bedruckstoff hinsichtlich seiner Eigenschaften bzw. Bedruckstoffdaten demjenigen Bedruckstoff entspricht, auf Grundlage dessen in der Druckvorstufe Druckformen hergestellt worden sind.With the aid of the method according to the invention, it is possible to check inline or online for print production as to whether a printing material actually used for printing corresponds to the printing material in terms of its properties or printing material data, on the basis of which printing plates have been produced in the prepress stage.

Werden hierbei nur relativ geringe Abweichungen des Bedruckstofftyps festgestellt, so kann durch eine Regelung von Prozessparametern die sich ergebende Farbabweichung kompensiert werden. Bei relativ großen Abweichungen wird vorzugsweise der Druckprozess abgebrochen, um das Drucken von Makulatur zu vermeiden.If only relatively small deviations of the printing material type are detected, then the resulting color deviation can be compensated by regulating process parameters. For relatively large deviations, the printing process is preferably aborted in order to avoid the printing of waste.

Die Erfindung ist bei Bogendruckmaschinen und bei Rollendruckmaschinen einsetzbar. Die Erfindung kann beim einseitigen und beidseitigen Bedruck von Bedruckstoffen zum Einsatz kommen, wobei der beidseitige Bedruck bei Bogendruckmaschinen als Schön- und Widerdruck bezeichnet wird, und zwar auch dann, wenn der Bedruckstoff an beiden Seiten unterschiedliche Eigenschaften aufweist. Dann sind für die beiden Seiten entsprechend unterschiedliche Sollwerte hinterlegt.The invention can be used in sheet-fed printing presses and in web-fed printing presses. The invention can be used in the one-sided and two-sided printing of substrates, the two-sided printing is referred to in sheetfed presses as perfecting, even if the substrate has different properties on both sides. Then, correspondingly different setpoints are stored for the two sides.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1010
BogendruckmaschineSheetfed
1111
Anlegerinvestor
1212
Auslegerboom
1313
Druckwerkprinting unit
1414
Formzylinderform cylinder
1515
Übertragungszylindertransfer cylinder
1616
Druckzylinderpressure cylinder
1717
Messeinrichtungmeasuring device
1818
Messeinrichtungmeasuring device
1919
Steuerungseinrichtungcontrol device

Claims (12)

Verfahren zum Betreiben einer Druckmaschine, insbesondere einer Offset-Druckmaschine, wobei in Druckwerken der Druckmaschine ein bogenförmiger oder bahnförmiger Bedruckstoff mit Hilfe von Druckformen, die unter Berücksichtigung von druckvorstufebasierten Bilddaten und Bedruckstoffdaten hergestellt sind, bedruckt wird,
dadurch gekennzeichnet,
dass mindestens ein unbedruckter und/oder mindestens ein bedruckter Abschnitt des Bedruckstoffs vermessen wird, wobei hierbei mindestens ein ermittelter Istwert mit mindestens einem bedruckstoffabhängigen Sollwert verglichen wird, um auf Grundlage des Vergleichs festzustellen, ob der tatsächlich verwendete Bedruckstoff hinsichtlich seiner Eigenschaften bzw. Bedruckstoffdaten demjenigen Bedruckstoff entspricht, auf Grundlage dessen die zum Drucken verwendeten Druckformen hergestellt sind.Method for operating a printing machine, in particular an offset printing machine, wherein in printing units of the printing press an arcuate or web-shaped printing material is printed with the aid of printing plates, which are produced with consideration of prepressure-based image data and printing material data,
characterized,
in that at least one unprinted and / or at least one printed section of the printing material is measured, in which at least one determined actual value is compared with at least one printing material-dependent setpoint value in order to determine on the basis of the comparison whether the printing material actually used corresponds to that printing material with regard to its properties or printing material data on the basis of which the printing plates used for printing are made. Verfahren nach Anspruch 1, dadurch gekennzeichnet,
dass der oder jeder unbedruckte Abschnitt mit Hilfe einer Farbmesseinrichtung vermessen wird.Method according to claim 1, characterized in that
that the or each unprinted portion is measured by means of a color measuring device. Verfahren nach Anspruch 1, dadurch gekennzeichnet,
dass der oder jeder unbedruckte Abschnitt mit Hilfe einer Glanzmesseinrichtung vermessen wird.Method according to claim 1, characterized in that
that the or each unprinted portion is measured by means of a gloss meter. Verfahren nach Anspruch 1, dadurch gekennzeichnet,
dass der oder jeder unbedruckte Abschnitt mit Hilfe einer Opazitätsmesseinrichtung vermessen wird.Method according to claim 1, characterized in that
that the or each unprinted portion is measured by means of an opacity measuring device. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der oder jeder bedruckte Abschnitt mit Hilfe einer Farbmesseinrichtung vermessen wird.Method according to one of claims 1 to 4, characterized in that the or each printed portion is measured by means of a color measuring device. Verfahren nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet,
dass jeder ermittelte Istwert mit mehreren, für unterschiedliche Bedruckstofftypen mit unterschiedlichen Eigenschaften bzw. Bedruckstoffdaten hinterlegten Sollwerten verglichen wird, um auf Grundlage des Vergleichs festzustellen, ob der tatsächlich verwendete Bedruckstoff hinsichtlich seiner Eigenschaften bzw. Bedruckstoffdaten demjenigen Bedruckstoff entspricht, auf Grundlage dessen die zum Drucken verwendeten Druckformen hergestellt sind.Method according to one of claims 1 to 5,
characterized,
in that each determined actual value is compared with a plurality of target values stored for different types of substrates with different properties or substrate data in order to determine on the basis of the comparison whether the substrate actually used corresponds in terms of its properties or substrate data to the substrate on the basis of which those used for printing Printing forms are made. Verfahren nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der oder jeder unbedruckte Abschnitt vor dem Bedrucken des Bedruckstoffs und/oder nach dem Bedrucken des Bedruckstoffs vermessen wird.Method according to one of claims 1 to 6, characterized in that the or each unprinted portion is measured before printing the substrate and / or after printing the substrate. Verfahren nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der oder jeder bedruckte Abschnitt nach dem Bedrucken des Bedruckstoffs vermessen wird.Method according to one of claims 1 to 7, characterized in that the or each printed portion is measured after the printing of the printing material. Verfahren nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass als Farbmesseinrichtung eine spektrale Farbmesseinrichtung verwendet wird, die Istwerte im L*a*b-Farbraum ermittelt, wobei diese Istwerte im L*a*b-Farbraum mit Sollwerten im L*a*b-Farbraum verglichen werden.Method according to one of claims 1 to 8, characterized in that a spectral color measuring device is used as the color measuring device, the actual values in L * a * b color space determined, these actual values in L * a * b color space with setpoints in L * a * b color space are compared. Verfahren nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass dann, wenn festgestellt wird, dass der tatsächlich verwendete Bedruckstoff von demjenigen Bedruckstoff, auf Grundlage dessen die zum Drucken verwendeten Druckformen hergestellt sind, abweicht, automatisch eine Fehlermeldung generiert und angezeigt wird.Method according to one of claims 1 to 9, characterized in that , if it is determined that the actual substrate used by the substrate on the basis of which the printing plates used for printing made deviates, automatically generated an error message and displayed. Verfahren nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass dann, wenn festgestellt wird, dass der tatsächlich verwendete Bedruckstoff von demjenigen Bedruckstoff, auf Grundlage dessen die zum Drucken verwendeten Druckformen hergestellt sind, abweicht, automatisch Parameter des Druckprozesses angepasst werden.Method according to one of claims 1 to 10, characterized in that , if it is determined that the substrate actually used of the printing material on the basis of which the printing plates used for printing made deviates, be automatically adjusted parameters of the printing process. Verfahren nach einem der Ansprüche 1 bis 11, dadurch gekennzeichnet, dass das Vermessen des oder jedes unbedruckten Abschnitts des Bedruckstoffs und/oder des oder jedes bedruckten Abschnitts des Bedruckstoffs inline bzw. online zum Drucken erfolgt.Method according to one of claims 1 to 11, characterized in that the measurement of the or each unprinted portion of the printing substrate and / or the or each printed portion of the printing material inline or online for printing.
EP20080154856 2007-05-04 2008-04-21 Method for operating a printing press Active EP1995067B1 (en)

Applications Claiming Priority (1)

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
DE102017211225A1 (en) 2017-06-30 2019-01-03 Koenig & Bauer Ag Method for operating a processing machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1155846A2 (en) * 2000-05-17 2001-11-21 NexPress Solutions LLC Method and device for adjusting the register in a multicolour printing machine
DE102006030170A1 (en) * 2005-07-01 2007-03-29 Upm-Kymmene Oyj Method and device for controlling print quality
DE102005049927A1 (en) * 2005-10-18 2007-04-19 Koenig & Bauer Ag Sensor arrangement, for monitoring the transport of printed material in a printing machine, comprises a sensor arranged on the printing path, a cleaning device for the sensor and a storage device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5082529A (en) * 1990-03-27 1992-01-21 Abb Process Automation Inc. Color measurement and control of a sheet material
DE19822662C2 (en) * 1998-05-20 2003-12-24 Roland Man Druckmasch Process for color reproduction on an image data oriented printing machine

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
EP1155846A2 (en) * 2000-05-17 2001-11-21 NexPress Solutions LLC Method and device for adjusting the register in a multicolour printing machine
DE102006030170A1 (en) * 2005-07-01 2007-03-29 Upm-Kymmene Oyj Method and device for controlling print quality
DE102005049927A1 (en) * 2005-10-18 2007-04-19 Koenig & Bauer Ag Sensor arrangement, for monitoring the transport of printed material in a printing machine, comprises a sensor arranged on the printing path, a cleaning device for the sensor and a storage device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017211225A1 (en) 2017-06-30 2019-01-03 Koenig & Bauer Ag Method for operating a processing machine

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EP1995067B1 (en) 2013-09-11
DE102007021039A1 (en) 2008-11-06
EP1995067A3 (en) 2011-06-29

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