EP2164706A2 - Procédé de détection, par métrologie, d'un matériau d'impression imprimé - Google Patents

Procédé de détection, par métrologie, d'un matériau d'impression imprimé

Info

Publication number
EP2164706A2
EP2164706A2 EP08758709A EP08758709A EP2164706A2 EP 2164706 A2 EP2164706 A2 EP 2164706A2 EP 08758709 A EP08758709 A EP 08758709A EP 08758709 A EP08758709 A EP 08758709A EP 2164706 A2 EP2164706 A2 EP 2164706A2
Authority
EP
European Patent Office
Prior art keywords
light
frequency
light source
source
measuring
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.)
Withdrawn
Application number
EP08758709A
Other languages
German (de)
English (en)
Inventor
Markus Jung-Diefenbach
Andreas Lippold
Karlheinz Mohn
Thomas Peter
Gerhard SCHRÖDER
Frank Seidel
Thomas Walter
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.)
Manroland AG
Original Assignee
Manroland 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
Application filed by Manroland AG filed Critical Manroland AG
Publication of EP2164706A2 publication Critical patent/EP2164706A2/fr
Withdrawn legal-status Critical Current

Links

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
    • 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

Definitions

  • the invention relates to a method for the metrological detection of a printed substrate according to the preamble of claim 1.
  • a sensor in particular a camera, is positioned in the direction of transport of the printing material, which records sections of a printed image printed on the printing material or a print control mark printed on the printing material outside the printed image. It is customary to illuminate the measuring range of the sensor or the camera on the substrate by means of a measuring illumination source.
  • the present invention is based on the problem to provide a novel method for metrological detection of a printed substrate.
  • the measurement illumination source for illuminating the measurement area and at least one such secondary light source of the printing machine whose light can reach the measurement area are operated such that the frequency of the light provided by the measurement illumination source is smaller than the frequency of the one provided by the or each secondary light source light.
  • the measurement illumination source and the or each secondary light source whose light can reach the measurement area such that the frequency of the light provided by the measurement illumination source is less than the frequency of the or each Secondary light source provided light.
  • the light provided by the or each secondary light source which light can reach the measuring area which is emitted by the measuring illumination source, impairs the measurement result of the sensor.
  • the measurement accuracy can be increased.
  • the quality of the recording which is detrimental to the recording quality, is avoided over time, which occurs cyclically in the course of time.
  • the secondary light source may in this context be a radiation source of emitted light for drying or curing printing inks and / or varnishes.
  • the secondary light source can also emit such light which is necessary for carrying out the intended measurement.
  • a special lamp in addition to the light spectrum required for curing or drying also generate light spectra that are sufficient for measuring the printed image.
  • the measurement illumination source (possibly) can be dispensed with.
  • the present invention can be used both in printing presses - both sheet-fed rotary and web-fed rotary printing presses and in finishing machines - such as in off-line paint machines or in an inkjet application.
  • the present invention relates to a method for metrological detection of a printed substrate within a printing machine, in particular within a sheet-fed press.
  • a printing material for printing is moved through a plurality of successively arranged printing units and / or coating units, wherein in each printing unit and / or coating unit a partial printing image in a special printing ink and / or by means of a special coating is applied to the printing material. Due to the overprinting of several partial print images, the desired complete multicolored print image is eventually produced on the printed sheet, if necessary with a complementary coating.
  • a print control mark printed on the printing material outside the printed image is done using a sensor, preferably a camera.
  • a predefined measuring range of the sensor on the printing material is illuminated with the aid of a measuring illumination source in order to ensure that the sensor, in particular the camera, can deliver good measured values.
  • the measurement illumination source is matched to the recording characteristics of the sensor or the camera.
  • secondary light sources can be installed on a printing press. Very often z. B. provided a UV curing light source in a dryer, with the aid of which applied to the substrate ink and / or lacquer cured and thus can be dried. Light provided by such secondary light sources can reach the measuring range of the sensor or the camera, which is illuminated by the measuring illumination source.
  • the measuring illumination source which serves to illuminate the measuring range of the sensor and is tuned to its recording characteristic, and at least those or all of the secondary light sources of the printing machine, whose light can get into the measuring range, so to operate that the frequency of the light provided by the measurement illumination source is less than the frequency of the light provided by the or each secondary light source.
  • secondary light sources whose light can get into the measuring range, operate at a higher frequency or drive as the measurement illumination source.
  • a UV curing light source is incorporated within the printing machine, the light of which can reach the measuring area, this means that the measuring illumination source and the UV curing light source are operated in such a way that the frequency of the measuring illumination source provided light is smaller than the frequency of the UV light provided by the UV curing light source.
  • the influence of the result of measurement of the printed image is avoided by any secondary light when the frequency is raised by appropriate control in a secondary light source upstream control device to a level above or well above the frequency level of the measurement illumination source.
  • the secondary light source which is here designed as a UV curing light source, operated in a higher frequency range than the measurement illumination source.
  • the curing light source is provided with a corresponding ballast.
  • This ballast allows to change the frequency of the light required for drying or hardening.
  • the frequency can be shifted into the range of very high values.
  • the value of the frequency can be adapted to the conditions occurring in the drying process in connection with the substances used.
  • the parameters for the type of printing ink and the printing substrate, the amount of ink applied, the ambient temperature and humidity and the machine speed can be taken into account.
  • the method according to the invention finds application, inter alia, in the so-called sheet inspection.
  • a finished printed sheet is passed through a measuring range after exiting the last printing unit of a sheet-fed offset printing machine.
  • a line scan of the printed sheet is performed by means of a camera.
  • the scanning is made possible by the illumination by means of an elongated light source arranged at the measuring area as a measuring illumination source.
  • the measuring range for curing or drying of the ink applied to the sheet color layer is often followed by a dryer. This emits light into the measuring range, which is in line with the light the measurement illumination source mixes or overlays.
  • the secondary light sources in this case the light source or the or the radiator of the dryer, are operated in a frequency range which is equal to or higher than that of the measurement illumination source. Therefore, a controller is provided which checks the frequency range of the secondary light source and optionally raises at least the value of the measurement illumination source.
  • the method according to the invention is used in sheet-fed printing presses, in web-fed printing presses and in so-called finishing machines in which printed products go offline to the actual printing process, e.g. can be finished by painting or inkjet printing.
  • the measuring illumination source can also be integrated into a secondary light source serving for drying printing ink and / or paint. This combined light source then radiates the required for the measurement and drying light in a mixture, in which case can be dispensed with a separate measurement illumination source.

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Coating Apparatus (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

L'invention concerne un procédé de détection, par métrologie, d'un matériau d'impression imprimé, à l'intérieur d'une machine d'impression, en particulier, d'une presse alimentée par feuilles, procédé selon lequel une découpe d'une image imprimée sur un matériau d'impression, en particulier une feuille d'impression, ou une marque de contrôle d'impression imprimée sur le matériau d'impression à l'extérieur de l'image d'impression, est détectée, par métrologie, au moyen d'un détecteur, un domaine de mesure du détecteur étant illuminé sur le matériau d'impression au moyen d'une source d'éclairage de mesure. L'invention est caractérisée en ce que les sources d'éclairage de mesure pour l'éclairage de la zone de mesure, et au moins une source de lumière secondaire de la machine d'impression, dont la lumière peut parvenir dans la zone de mesure, sont activées de telle façon que la fréquence de la lumière produite par la source d'éclairage de mesure soit plus faible que la fréquence de la lumière produite par la/ ou chacune des/ source(s) de lumière secondaire.
EP08758709A 2007-07-04 2008-05-23 Procédé de détection, par métrologie, d'un matériau d'impression imprimé Withdrawn EP2164706A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200710031088 DE102007031088A1 (de) 2007-07-04 2007-07-04 Verfahren zur messtechnischen Erfassung eines bedruckten Bedruckstoffs
PCT/EP2008/004111 WO2009003559A2 (fr) 2007-07-04 2008-05-23 Procédé de détection, par métrologie, d'un matériau d'impression imprimé

Publications (1)

Publication Number Publication Date
EP2164706A2 true EP2164706A2 (fr) 2010-03-24

Family

ID=40039957

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08758709A Withdrawn EP2164706A2 (fr) 2007-07-04 2008-05-23 Procédé de détection, par métrologie, d'un matériau d'impression imprimé

Country Status (4)

Country Link
EP (1) EP2164706A2 (fr)
JP (1) JP2010531980A (fr)
DE (1) DE102007031088A1 (fr)
WO (1) WO2009003559A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013211250B4 (de) * 2013-06-17 2019-05-02 Koenig & Bauer Ag Druckmaschine mit mehreren gemeinsam einen Bedruckstoff bedruckenden Druckwerken
DE102016109934A1 (de) * 2016-05-30 2017-11-30 grapho metronic Meß- und Regeltechnik GmbH Steuerung von Inline-Aggregaten in einer Druckmaschine

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19511782C2 (de) * 1995-03-30 1997-07-31 Kurandt System Gmbh Verfahren zur Prüfung von Farbdruckvorlagen und Vorrichtung zur Durchführung des Verfahrens
US5767980A (en) * 1995-06-20 1998-06-16 Goss Graphic Systems, Inc. Video based color sensing device for a printing press control system
DE69711386T2 (de) * 1997-10-14 2002-12-19 Xeikon Nv Verfahren zum Steuern des Registers von bedruckten Bildern in einem Drucker
CH694184A5 (fr) * 2000-12-27 2004-08-31 Bobst Sa Dispositif de lecture de marques de rep'rage dans une machine d'impression polychrome.
JP2003251789A (ja) * 2001-12-27 2003-09-09 Komori Corp 印刷機の印刷品質検査装置
GB2408799B (en) * 2003-01-14 2005-12-21 Qti Presstech Ltd Improvements to scanning heads
DE102005026127B4 (de) * 2005-06-07 2007-02-08 Koenig & Bauer Ag Druckmaschine und ein Verfahren zur Herstellung eines Druckerzeugnisses

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009003559A3 *

Also Published As

Publication number Publication date
JP2010531980A (ja) 2010-09-30
WO2009003559A3 (fr) 2009-02-19
DE102007031088A1 (de) 2009-01-08
WO2009003559A2 (fr) 2009-01-08

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