EP1300243A2 - Procédé et dispositif pour déterminer la position d'une bande imprimée - Google Patents

Procédé et dispositif pour déterminer la position d'une bande imprimée Download PDF

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Publication number
EP1300243A2
EP1300243A2 EP02405829A EP02405829A EP1300243A2 EP 1300243 A2 EP1300243 A2 EP 1300243A2 EP 02405829 A EP02405829 A EP 02405829A EP 02405829 A EP02405829 A EP 02405829A EP 1300243 A2 EP1300243 A2 EP 1300243A2
Authority
EP
European Patent Office
Prior art keywords
paper web
printed
printing
sensor
image data
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP02405829A
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German (de)
English (en)
Other versions
EP1300243A3 (fr
EP1300243B1 (fr
Inventor
Jean-Claude Mengisen
Curt Munz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wifag Maschinenfabrik AG
Original Assignee
Wifag Maschinenfabrik AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Application filed by Wifag Maschinenfabrik AG filed Critical Wifag Maschinenfabrik AG
Publication of EP1300243A2 publication Critical patent/EP1300243A2/fr
Publication of EP1300243A3 publication Critical patent/EP1300243A3/fr
Application granted granted Critical
Publication of EP1300243B1 publication Critical patent/EP1300243B1/fr
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0081—Devices for scanning register marks

Definitions

  • the invention relates to a method and a device for detection the position of at least one printed web, preferably a paper web in a printing machine, in particular for determining the cutting position of a printed paper web in a rotary printing press for newspaper printing.
  • Newspapers are mainly produced by offset printing. There several paper webs are unwound from rolls in the printing units printed and finally folded in the folder and cut. While one Paper web runs through the machine, it is constantly in one tense state.
  • Double-width paper webs become two after printing in the direction of travel or more strands split.
  • the individual strands of a paper web can go through different paths over turner bars before they multiply Bundles are merged.
  • the different strands are added before entering the folder multilayered bundles merged and through funnels in the direction of the Folded tracks. Subsequently, the bundles in the folder are transverse to Direction of cutting cut so that the cut outside the type area of the Pages lies. Errors of the cutting position lead to the printed newspapers are not salable.
  • the cutting position can be adjusted by the printer by Register rollers the web length between printing unit and cutting blade or Cutting cylinder is adjusted. It is also possible, the cutting position by the same Adjust the angular position of the printing cylinder to be printed and thus to dispense with a register roller, what also as a virtual Main register is called. Through the register rollers of the secondary registers The cutting positions of the individual strands of a paper web can be independent be adjusted from each other.
  • the appropriate positions are the Main registers and secondary registers are known and can be at the start of the Production runs are more or less exactly preset. Most of the time Printer but still the cutting positions at the beginning of the production run of Hand adjust. This results in a lot of paper copies and a Loss of time during production.
  • a large measuring mark on the printed paper web through a simple optoelectronic sensor e.g. a contrast button
  • a simple optoelectronic sensor e.g. a contrast button
  • large brands affect the appearance of the printed product, e.g. the newspaper.
  • Smaller brands, which are less annoying require more sophisticated optoelectronic sensors, e.g. CCD cameras, in Connection with digital pattern recognition or image data processing. in the general, the technical effort to recognize the marks is greater, the smaller these are.
  • Another way to detect cutting position errors is from DE199 10 835 C1 and consists in scanning the printed image in two places.
  • the first scan at the output of the print engine forms a reference that coincides with the Sampling before the funnel inlet can be compared.
  • the positional error between the two measuring locations can be determined which can then be automatically corrected by appropriate regulation.
  • the disadvantage of this method is that only the positional error between the two Measuring points is corrected and that multiple sensors must be used.
  • a preferred application is the automatic measurement and control of the cutting position of printed Paper webs in rotary printing machines for newspaper printing.
  • sensors such. B. optoelectronic sensors
  • the signals measured by the sensors become advantageously prepared for suitable digital measured values.
  • the reference values of the prepress or the print templates are then with compared to the measured values, z. For example, the correlation of these values is examined or calculated. From the comparison of the reference values with the measured values can the position of the printed paper web in running direction can be calculated. Thus Can easily do without attaching an additional mark in the print image the position of a printed paper web can be precisely determined.
  • the digital or analog image data from the publisher or prepress may be e.g. in the form of the image content of multicolored newspaper pages present and e.g. in the form of files in Postscript format or PDF format to be delivered.
  • the digital image data from the publisher or from the prepress can for example, in the form of the image contents of the printing plates.
  • the Image data of a multicolor newspaper page are usually by raster Image Processing (RIP) and into the image data of the printing plates for the Basic colors cyan, magenta, yellow, black separately. So arise from the digital image data of a colored newspaper page the digital image data of the associated printing plates.
  • the separated image data of the printing plates become also referred to as bitmaps, RIP pixel maps or separations.
  • the separated Image data of the print templates may e.g. delivered as files in TIFF-G4 format become.
  • Reference values are calculated.
  • the reference values may e.g. the Specify the brightness gradient on a narrow strip of a newspaper page.
  • An opto-electronic sensor in the printing machine which increases the brightness the corresponding strip of printed paper web, then becomes a provide similar brightness when the printed paper web on the Sensor is moved past.
  • the position of the Paper web By comparing the measured values with the reference values, e.g. through correlation of the measured brightness curve with that from the digital image data of Prepress calculated brightness gradient, then the position of the Paper web to be determined in the direction of travel.
  • the thus determined position of the printed paper web is advantageous in Direction of movement for automatic control of the cutting position of the printed Paper web used in printing presses.
  • the inventive device for determining the position of a printed Paper web in a printing machine includes a data processing system for calculating the Reference values from the preferably digital image data of the print original or the Prepress.
  • At least one preferred optoelectronic sensor for Observation of the printed paper web provided, which at least one Part of a print image on the web can capture.
  • the reference values obtained from the digital image data of the prepress are compared in a comparison device with the measured values, which of the optical sensor or sensors were recorded to from the difference or correlation of reference values and measured values the Determine the position of the printed paper web. Is the correlation too low? an error message can be generated.
  • the device according to the invention also has a control, with which using the thus determined actual position of the printed Paper web in running direction, the cutting position of the paper web, e.g. by the Controlling a register roller, can be controlled.
  • reference values are calculated using a suitable method.
  • opto-electronic sensors which capture the printed image on the paper web, measured values are supplied, which are compared with the reference values can.
  • the actual value of the position of the printed paper web is in Direction determined.
  • the thus determined position of the paper web in the running direction can subsequently be fed to a cutting position controller as an actual value.
  • the cutting position controller can then by comparing the actual value with a predetermined setpoint the Automatically regulate the cutting position.
  • the control value of the cutting position controller can be for the control of main register, secondary register, bundle register or one virtual registers are used.
  • the cutting position automatically at any time to measure and to regulate. It is an automatic startup of a printing press without manual Interventions to correct the cutting position possible. Even with flying Change of expenditure, the cutting position can be regulated automatically become.
  • the formation of the reference values can be done by calculation from the image data of the Pre-press done.
  • the reference values can be derived directly from the Print template, from the non-screened image data, from the rasterized and color-separated image data, or from the data of scanned printing plates or Films can be calculated by a suitable method.
  • the reference values can depend on the optical sensors in the printing press by means of a Calculator so normalized and prepared that a simple comparison or a direct correlation of the reference values with the measured values is possible.
  • a particularly suitable image strip can be selected so that a brightness profile with a significant signal curve is measured.
  • the Reference values and the measured values in this case can be, for example, in one-dimensional arrays of brightness values are stored.
  • the corresponding reference values and metrics can be stored in multi-dimensional arrays, for example become.
  • the printed paper web is provided with a suitable optoelectronic Sensor system recorded the printed image.
  • a suitable optoelectronic Sensor system recorded the printed image. This can be done, for example Contrast, CCD CMOS cameras or line cameras are running.
  • the Recording may e.g. continuously, e.g. by forming a Correlation coefficients the position of the printed paper web in the running direction can be determined.
  • the starting point of the image capture is while e.g. synchronously with the rotation of the cutting cylinder in the printing machine at each revolution at a certain angular position of the cutting cylinder respectively triggered by a start pulse, which are supplied by a position sensor can.
  • contrast button When using a contrast button, the amount of reflected light along a narrow image strip detected in the direction of the paper web.
  • the way obtained signals can be digitized by a computer and conveniently stored in a one-dimensional array of measurements become. It is advantageous that several contrast scanners distributed across the web so that a particularly suitable image strip can be selected. It is equally advantageous that these contrast buttons by a manual or automatic positioning unit on a particularly suitable strip of Print image can be positioned, wherein the positioning unit is formed can be that z.
  • CMOS cameras or line cameras When using CCD cameras, CMOS cameras or line cameras the whole print image or parts of it will be used to determine the location of the recorded on a printed paper web. The data gained thereby can conveniently stored in a multi-dimensional array of measurements become.
  • the position of the printed paper web determined. It is particularly appropriate for the Comparison to use correlation methods or Fourier analyzes.
  • Figure 1 shows the data flow in the calculation of the position of a printed Paper web using digital image data of the prepress. From the Image data 1 of the precursor become reference values 3 in a computing unit 2 calculated. From the measuring signal 4 from one sensor or from several Sensors that capture the print image on the paper web are in one another unit 5 the measurement signals 4 to 6 measured values, which with the Reference values 3 can be compared in a comparison unit 7. By Comparison of the measured values 6 with the reference values 3, a signal 8 is determined, which indicates the position of the printed paper web.
  • FIG. 2 shows examples of reference values 11 and measured values 12 and shows by way of example, how the layer 14 of the printed paper web by comparing the Reference values 11 and the measured values 12 can be determined.
  • the Reference values 11 are shown in a diagram in which the horizontal axis 10 the way in the vertical direction with a picture from the Prepress and the vertical axis 9 indicates the brightness.
  • the reference values 11 describe the brightness progression to a narrow one vertical stripes of the artwork, z. B. a multi-colored newspaper page.
  • the Measured values 12 in this example describe the brightness progression on one corresponding strips of the printed paper web in the direction of the Paper web, shown above the axis 13.
  • the reference values 11 and measured values 12 in this example show similar brightness gradients. By comparing the Brightness gradients of the measured values 12 and the reference values 11 can be the Position 14 of the printed web absolute or relative to a fixed point be determined.
  • FIG. 3 shows examples of a simple image data content 31 from FIG Prepress and the corresponding print image 33 on the paper web. It will shown as an image strip 32 from the image template of the prepress and a corresponding strip 34 selected from the printed image 33 on the paper web can be.
  • Figure 4 shows an exemplary arrangement for determining the cutting position of a printed paper web in a printing machine.
  • Digital image data 50 from the Prepress are sent to a device 49 for calculating the position of printed paper web delivered.
  • the print image on the paper web 44 is through an optoelectronic sensor 43 sampled, which is arranged as close to the cutting cylinder 41.
  • the Measuring signals 46 of the optical sensor 43 are connected to the position of the Cutting cylinder 41 synchronized. For this, the angular position of Cutting cylinder detected with an angular position sensor 42 and then the angular position signals 45 for the synchronization of the measuring signals 46 of optical sensor 43 used in a synchronization device 47.
  • the Synchronized measurement signals 48 of the optical sensor 43 have such a fixed Reference to the angular position of the cutting cylinder 41 and thus to his Cutting position.
  • the synchronized measurement signal 48 of the optical sensor 43 is sent to the device 49 for calculating the position of the printed Paper web delivered, with a corresponding position signal 51 issued becomes.
  • Figure 5 shows various types of image data in prepress.
  • the image data B of a page content e.g. a multicolor newspaper page, are e.g. in the Postscript format or in PDF format.
  • From the image data B of a Page content is raster image processing (RIP) image content for the corresponding printing plates for the process colors Cyan C, Magenta M, Yellow Y and Black BK calculated.
  • the rasterized and color separated image data of the Printing plates are e.g. shown in TIFF G4 format.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Controlling Sheets Or Webs (AREA)
EP02405829A 2001-10-04 2002-09-26 Procédé et dispositif pour déterminer la position d'une bande imprimée Revoked EP1300243B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10149158 2001-10-04
DE10149158A DE10149158B4 (de) 2001-10-04 2001-10-04 Verfahren und Vorrichtung zur Ermittlung der Position einer bedruckten Papierbahn

Publications (3)

Publication Number Publication Date
EP1300243A2 true EP1300243A2 (fr) 2003-04-09
EP1300243A3 EP1300243A3 (fr) 2004-03-03
EP1300243B1 EP1300243B1 (fr) 2006-10-18

Family

ID=7701505

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02405829A Revoked EP1300243B1 (fr) 2001-10-04 2002-09-26 Procédé et dispositif pour déterminer la position d'une bande imprimée

Country Status (6)

Country Link
US (1) US6779454B2 (fr)
EP (1) EP1300243B1 (fr)
AT (1) ATE342803T1 (fr)
DE (2) DE10149158B4 (fr)
DK (1) DK1300243T3 (fr)
ES (1) ES2274952T3 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2017082A1 (fr) * 2007-07-18 2009-01-21 Texmag GmbH Vertriebsgesellschaft Méthode pour déterminer des rapports officiels sur une bande
US7536955B2 (en) 2003-07-11 2009-05-26 Koenig & Bauer Aktiengesellschaft Method and device for influencing the fan-out effect
EP2119565A3 (fr) * 2008-05-16 2018-03-07 grapho metronic Mess- und Regeltechnik GmbH Procédé destiné à la régulation de processus d'impression

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7523705B2 (en) * 2004-03-08 2009-04-28 Goss International Americas, Inc. Web printing press and method for controlling print-to-cut and circumferential register
DE102004028056A1 (de) * 2004-04-22 2005-11-17 Maschinenfabrik Wifag Vorrichtung und Verfahren zur Erkennung von Registerfehlern
DE102005041179A1 (de) * 2005-08-31 2007-03-01 Man Roland Druckmaschinen Ag Verfahren zur Regelung von drucktechnischen Prozessen
EP2004531B1 (fr) * 2006-03-16 2013-08-14 Vefin N.V. Équipement pour effectuer des opérations répétitives
DE102007003488A1 (de) 2007-01-24 2008-07-31 Man Roland Druckmaschinen Ag Verfahren zur Schnittregisterregelung
DE102007007447A1 (de) 2007-02-15 2008-08-28 Man Roland Druckmaschinen Ag Verfahren zur Regelung von drucktechnischen Prozessen
DE102007012736A1 (de) 2007-03-16 2008-09-18 Man Roland Druckmaschinen Ag Verfahren zur Regelung von drucktechnischen Prozessen
DE102007039373C5 (de) 2007-08-21 2018-10-25 Koenig & Bauer Ag Verfahren zur Überwachung des Stranglaufes in einem Trichteraufbau einer Rotationsdruckmaschine
DE102008002387B3 (de) * 2008-06-12 2009-07-09 Koenig & Bauer Aktiengesellschaft Verfahren zur Ermittlung einer Referenz zur Einstellung eines Arbeitsaktes
JP5713587B2 (ja) * 2010-06-29 2015-05-07 三菱重工印刷紙工機械株式会社 製函機，検査装置，及び製函機の印刷見当制御方法
EP4146477A1 (fr) * 2020-05-06 2023-03-15 Windmöller & Hölscher KG Procédé de gestion automatique d'erreurs d'une machine d'impression, et machine d'impression

Citations (1)

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DE19506774A1 (de) 1994-02-28 1995-08-31 Rockwell International Corp Kontinuierliche Rotationsdruckerpresse sowie Verfahren zum Steuern der relativen Positionierung von Seitenschnitten bei einer kontinuierlichen Rotationsdruckerpresse

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EP0127831B1 (fr) * 1983-06-02 1990-03-14 Web Printing Controls Co. Dispositif de repérage à boucle fermée
US4736446A (en) * 1985-03-29 1988-04-05 Quad-Tech Inc. Cutoff control system
DE4012608A1 (de) * 1990-04-20 1991-10-24 Roland Man Druckmasch Verfahren und vorrichtung zur bestimmung von passerdifferenzen an druckbildstellen eines mehrfarbenoffsetdruckes
DE4234308C2 (de) * 1992-10-12 1996-08-29 Heidelberger Druckmasch Ag Verfahren zum Einstellen des Schnittregisters an einer einer Rollendruckmaschine nachgeordneten Querschneidvorrichtung
DE4321179A1 (de) * 1993-06-25 1995-01-05 Heidelberger Druckmasch Ag Verfahren und Einrichtung zur Steuerung oder Regelung von Betriebsvorgängen einer drucktechnischen Maschine
EP0770480B1 (fr) 1995-10-25 2001-12-19 Heidelberger Druckmaschinen Aktiengesellschaft Presse à imprimer digitale avec contrôle de registre
DE29516830U1 (de) * 1995-10-25 1995-12-07 Heidelberger Druckmaschinen Ag, 69115 Heidelberg Digitale Druckmaschine mit Registerregelung
US6018687A (en) * 1997-02-07 2000-01-25 Quad/Tech, Inc. Method and apparatus for printing cutoff control using prepress data
DE19855177A1 (de) * 1998-11-30 2000-06-08 Windmoeller & Hoelscher Verfahren zur automatischen Umfangs- und Seitenregistereinstellung von Druckwalzen
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Publication number Priority date Publication date Assignee Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7536955B2 (en) 2003-07-11 2009-05-26 Koenig & Bauer Aktiengesellschaft Method and device for influencing the fan-out effect
EP2017082A1 (fr) * 2007-07-18 2009-01-21 Texmag GmbH Vertriebsgesellschaft Méthode pour déterminer des rapports officiels sur une bande
EP2119565A3 (fr) * 2008-05-16 2018-03-07 grapho metronic Mess- und Regeltechnik GmbH Procédé destiné à la régulation de processus d'impression

Also Published As

Publication number Publication date
US6779454B2 (en) 2004-08-24
DK1300243T3 (da) 2007-02-19
EP1300243A3 (fr) 2004-03-03
EP1300243B1 (fr) 2006-10-18
DE50208485D1 (de) 2006-11-30
ES2274952T3 (es) 2007-06-01
DE10149158A1 (de) 2003-04-24
US20030066451A1 (en) 2003-04-10
DE10149158B4 (de) 2010-07-22
ATE342803T1 (de) 2006-11-15

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