EP0442322A1 - Procédé pour le réglage de la couleur et le préréglage par zones - Google Patents

Procédé pour le réglage de la couleur et le préréglage par zones Download PDF

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Publication number
EP0442322A1
EP0442322A1 EP91101179A EP91101179A EP0442322A1 EP 0442322 A1 EP0442322 A1 EP 0442322A1 EP 91101179 A EP91101179 A EP 91101179A EP 91101179 A EP91101179 A EP 91101179A EP 0442322 A1 EP0442322 A1 EP 0442322A1
Authority
EP
European Patent Office
Prior art keywords
color
zone
computer
presetting
values
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
EP91101179A
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German (de)
English (en)
Other versions
EP0442322B1 (fr
Inventor
Werner Maier
Gerd Steiner
Josef Schneider
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
MAN Roland Druckmaschinen AG
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Filing date
Publication date
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0442322A1 publication Critical patent/EP0442322A1/fr
Application granted granted Critical
Publication of EP0442322B1 publication Critical patent/EP0442322B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B41F33/0027—Devices for scanning originals, printing formes or the like for determining or presetting the ink supply

Definitions

  • the invention relates to a method for color control and zone-by-zone presetting of ink metering elements in inking units of rotary printing presses, in particular offset rotary printing presses, corresponding to the area coverage determined zone by zone, and devices for carrying out the method, according to the preamble of claim 1.
  • DE-OS 29 50 606 and DE-OS 29 50 650 it is already known to scan films or printing plates by means of optoelectronic measuring devices with respect to their area coverage by color zones and, after integration or summation of the scanned values, presetting information for color metering elements, for example for color slides to be calculated in inking units of offset rotary printing presses.
  • the scanning elements each record the width of a color zone and have a dimension of 5 mm x 720 mm on a printing press of a normal size.
  • the presetting values can thus be derived in each case in a color zone from the area coverage. It has been shown in practice that the presetting values to be determined in this way are not sufficiently precise, so that complex readjustments and corrections are necessary which, among other things, lead to an increased amount of waste and thereby increase the pressure time.
  • the object of the present invention is to provide a method and a device for carrying out this method in order to be able to determine or influence the ink zone presetting values and the local ink requirements more precisely.
  • Claims 3 to 10 represent advantageous constructions of a device according to the invention for carrying out the method.
  • the presetting values for the ink zone metering can be determined much more precisely, since, for example, small areas such as fine structures (grid, fine line) and coarse structures (solid areas) can be distinguished on the printing form or on the film or on the printing sheets.
  • small areas such as fine structures (grid, fine line) and coarse structures (solid areas) can be distinguished on the printing form or on the film or on the printing sheets.
  • the lower consumption in full tone areas compared to screen tone areas or fine line areas can be taken into account in the form of correction factors, preferably by appropriate weighting of the area parts to be printed or the scanning pattern.
  • correction factors depending on the parameter state of the printing process can be modified and stored parameter-related via a self-learning system or via a so-called expert system, for example for repeat jobs.
  • a self-learning system for example paper, ink, dampening solution composition, printing speed, inking characteristics, etc.
  • expert system for example for repeat jobs.
  • the proposed method makes it possible to determine printing areas printed on one another in the individual colors. From the values that can be determined in this way, it is possible to derive the strength of the ink acceptance disturbances for the individual ink zone.
  • the color presetting can thus be optimized by means of correction factors when determining the color presetting values. Knowledge of the expected color acceptance disturbance is also of interest for color control or color regulation.
  • the correction factors that can be determined according to the invention the dynamics of the color flows when the color flows change in individual colors or in color zones can be included.
  • the invention advantageously enables the elimination of stenciling effects, since the novel detection makes it possible to make predictions about stenciling to be expected.
  • the stencil effects can be counteracted by the lateral rubbing in the inking unit, preferably by means of a paint grinder.
  • Another advantage lies in the fact that in the detection according to the invention of smaller areas, compared to the previously usually recorded areas, the previously used hardware can be used in a modified form.
  • An important advantage of the invention results from the fact that the scanning grid values determined from the printing area portions are weighted within the color zone before the sum is formed, and that the color requirement per color zone can be optimized by means of correction factors.
  • the position of successive and adjacent surface portions and possibly the same positions or positions of the scanning grid in the associated different-colored templates is determined and evaluated, from which correction factors can be derived which are necessary for the color zone presetting or color control ( or regulation) bring advantages.
  • the weighting and calculation of the corrections is carried out in a separate computer or in a computer that already exists in the machine. In practice, an empirical determination of the correction factors will often be available, which are then held in a memory in order to be taken into account in accordance with the scanning sequence for the raster areas just scanned.
  • a schematically illustrated printing machine 1 for example an offset rotary printing machine for printing on print carrier webs or for printing sheets, is connected to an ink zone presetting device 2, which not only shows the electrical or electronic control components but also the required mechanics for zone-wise presetting of metering elements Color sliders included.
  • a color requirement determination computer 3 is connected to the color zone presetting device 2, and the determined information about the color coverage of each zone can be supplied by a film or plate scanner 4. It is understood that the values scanned by a film and plate scanner also e.g. can be stored in a tape or a floppy disk, from which these can be read into the color requirement determination computer 3.
  • the film or plate scanner 4 is equipped with at least one row of scanners. For the sake of simplicity, only one scanner 5 or 6 is shown in FIG. 1.
  • the scanner 5 or 6 is constructed in such a way that a scanning grid of preferably 2 mm ⁇ 2.5 mm is detected. The result of this is that, compared to the color zones, which are usually 20 mm to 60 mm wide, viewed in the X direction, a larger number of adjacent scanning grids 7 can be detected within each color zone.
  • the scanner 5 or 6 should be substantially smaller in the X and Y directions than the color zone.
  • the evaluation accuracy becomes better the smaller, i.e. the finer the scanning grid 7 is.
  • a preferred size of the scanning grid 5, 6 is 2.5 mm in the X direction and 2.0 mm in the Y direction.
  • the scanner 5 or 6 required to detect a scanner grid 7 is only shown once, but seen in the X direction, a larger number, approximately over the width of a color zone, of such scanners 5, 6 are arranged in the form of a line .
  • Fig. 1 two printing templates 8, 9 are indicated, which can be scanned simultaneously or in succession, for example for performing a two-color printing.
  • the templates 8, 9 can represent both plates and films.
  • Ink zones 10, 11 are indicated on the print templates 8, 9, which can be improved or refined in comparison to the prior art. Due to the smaller dimensions of the scanning grid 7, a much more exact determination of the color coverage can take place in comparison with the known. It is understood that only one row of several scanning elements 5 can be used when scanning the templates 8 and 9, so that a further row of scanning elements 6 can be saved if the scanning of the templates 8, 9 takes place in succession.
  • the values determined by the film or plate scanner 4 can be further processed in an area coverage detection logic 13.
  • a color coverage detection logic 14 is provided, with the aid of which the XY values of scanning grids of the same position are compared between different (color) originals 8, 9 in order to determine whether color areas are printed on top of one another, so that Corresponding correction values have to be determined which have an influence on the ink zone presetting in order to compensate for the ink acceptance disturbances which frequently occur due to overprinting.
  • the values prepared in the XY coordinate detection logic 12, the area coverage detection logic 13 and the color coverage determination logic 14 are sent to a weighting computer 16, which includes a weighting memory, not specified.
  • Empirically determined correction factors can be input via an input device 15. Alternatively, it is also possible to calculate correction factors for the individual grids.
  • the values previously supplied in a simple manner from a film / plate scanner 4 to the color requirement calculation computer 3 are thus, according to the invention, applied a correction factor or a correction value for each scanning grid by the weighting computer 16 before the sum of the scanned values in a color zone the weighting computer 16 is determined on the basis of the information supplied to it in the manner described above.
  • the presetting values thus determined for each ink zone 10, 11 then arrive at the corresponding inking unit of the printing press 1 in order to preset the ink metering elements in the form of ink slides or ink knife sections.
  • the presetting according to the invention is considerably more precise compared to what is known, so that there is less waste and a shorter pressure phase.
  • a grater 21 axially oscillating distributor roller
  • phase position that is to say the use of the axial displacement, in the stroke and in the distributor frequency, in order to distribute the paint to be applied in the XY direction.
  • the scanned Values from which the subject to be printed can be derived are thus distributed to the ink to be applied to a printing plate (not shown) in the printing press 1, preferably by means of a scraper, during the inking process in the X and Y directions, which avoids the feared stenciling leads.
  • a further improvement of the presetting of the ink metering elements results from the fact that, with the aid of a subject computer, 20 investment times and investment time of a respective jack 22 of an inking unit of the printing press 1, not shown in detail, can be controlled with regard to the investment time on the next inking roller and the time of investment.
  • the color requirement per color zone taken into account, but also the respective location, e.g. within a color zone, i.e. by controlling the grater 21 and / or the ink lifter 22, the ink is also correctly placed and rubbed in the circumferential direction of the plate (26 or Y).
  • a further embodiment within the scope of the invention results from the fact that the print images produced by the printing machine 1 are scanned, for example densitometrically or colorimetrically, and that the values obtained therefrom can be fed to the color requirement determination computer 3 by switching on a print carrier scanning logic with a self-learning system or with a so-called expert system, so that the presetting values can be continuously refined during the proofing and also during the production printing phase.
  • the application of the method according to the invention also enables the ink accumulation in the inking unit, which is inevitable due to the cylinder pit pass, to be taken into account in such a way that, between the start and end of printing, there is a corresponding influence on the application points of the jack or jack roller 22 and control of the oscillation of the grater 21 he follows.
  • the effect of an uneven color distribution in the printing direction can thus be reduced or eliminated, taking into account the subject to be printed.
  • Fig. 2 shows a subject 23 in the form of a 2. From this representation it can be seen that within a schematically indicated color zone 10 there is a larger number of scanning areas, as indicated at 7, since according to the invention the scanning grid 7 is smaller, preferably substantially is smaller than the width of the color zone 10 (2.5 mm x 2 mm). Thus a much more refined detection of the printing and non-printing areas within a color zone can be carried out, i.e. this is quasi rasterized.
  • Fig. 3 illustrates on a plate 24 a "color mountain or a color mountain" 25 that according to the invention in the direction of arrow 26 (Y direction) and in the direction of arrow 27 (X direction) in the manner described above
  • Use of the controlled rollers 21, 22 can be placed (applied) and moved, so that in Compared to the prior art, there is a significant improvement in the coloring depending on the subject to be printed.
  • the presetting and control data determined or corrected by the weighting computer 16 can be visualized, e.g. on a screen or in the form of a log.
  • a further development of the invention is that a computer network between weighting computer 16, subject computer 20 and stencil correction computer 17 on the one hand and a self-learning system or an expert system 18 on the other hand is that this self-learning system or expert system 18 previous orders with all automatic and manual settings and saves corrections for repeat orders and, on the basis of the corrections, modifies the control parameters in weighting calculator 16, subject calculator 20 and stencil correction calculator 17.

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  • Inking, Control Or Cleaning Of Printing Machines (AREA)
EP91101179A 1990-02-10 1991-01-30 Procédé pour le réglage de la couleur et le préréglage par zones Expired - Lifetime EP0442322B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4004056 1990-02-10
DE4004056A DE4004056A1 (de) 1990-02-10 1990-02-10 Verfahren und vorrichtung zur farbsteuerung und zonenweisen voreinstellung

Publications (2)

Publication Number Publication Date
EP0442322A1 true EP0442322A1 (fr) 1991-08-21
EP0442322B1 EP0442322B1 (fr) 1994-10-19

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Application Number Title Priority Date Filing Date
EP91101179A Expired - Lifetime EP0442322B1 (fr) 1990-02-10 1991-01-30 Procédé pour le réglage de la couleur et le préréglage par zones

Country Status (5)

Country Link
US (1) US5170711A (fr)
EP (1) EP0442322B1 (fr)
JP (1) JPH054330A (fr)
CA (1) CA2035647A1 (fr)
DE (2) DE4004056A1 (fr)

Cited By (4)

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US5662044A (en) * 1995-02-24 1997-09-02 Heidelberger Druckmaschinen Ag Offset printing method
EP1167033A1 (fr) * 2000-06-28 2002-01-02 Heidelberger Druckmaschinen Aktiengesellschaft Procédé pour prérégler un dispositif d'encrage
EP2272670A1 (fr) * 2009-07-01 2011-01-12 manroland AG Procédé de détermination de paramètres de préréglage pour une unité d'encrage
US8826819B2 (en) 2008-08-22 2014-09-09 Heidelberger Druckmaschinen Ag Method for controlling inking units and/or dampening units

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DE4300071C2 (de) * 1993-01-05 2002-08-14 Heidelberger Druckmasch Ag Verfahren zur Steuerung einer Farbführung in einem Druckwerk einer Druckmaschine
CA2123245A1 (fr) 1993-09-29 1995-03-30 Alan F. Barney Systeme de commande de presse a imprimer et accessoires et dispositifs auxiliaires connexes
DE4439961A1 (de) * 1993-11-09 1995-07-06 Rockwell International Corp Prozeßsteuereinheit für eine Druckerpresse
DE4338625A1 (de) * 1993-11-12 1995-05-18 Oxy Dry Maschinen Gmbh Verfahren zur vollautomatischen Zylinderreinigung bei Druckmaschinen mit zentralem Leitsystem
DE4341011C2 (de) * 1993-12-02 2000-04-13 Roland Man Druckmasch Verfahren zur Steuerung der Zufuhrmenge von Druckfarbe bei einer Druckmaschine
US5563985A (en) * 1994-01-05 1996-10-08 Xerox Corporation Image processing method to reduce marking material coverage in printing processes
JPH07227958A (ja) * 1994-02-17 1995-08-29 Komori Corp 印刷機のインキ供給量制御方法および装置
DE4435991C2 (de) * 1994-10-08 1998-02-12 Heidelberger Druckmasch Ag Verfahren und Vorrichtung zum Konstanthalten von Farbschichtdicken in einem Farbwerk einer Druckmaschine
DE19516352A1 (de) * 1995-05-04 1996-11-07 Heidelberger Druckmasch Ag Vorrichtung zur Bildinspektion
DE19602103B4 (de) * 1996-01-22 2006-05-04 Heidelberger Druckmaschinen Ag Verfahren zum Bestimmen von Meßorten für eine Abtastung eines mehrfarbigen Druckbildes zum Steuern oder Regeln einer Farbgebung einer Druckmaschine
DE29612159U1 (de) * 1996-07-12 1996-08-29 MAN Roland Druckmaschinen AG, 63075 Offenbach Einrichtung zur schnellen Schaffung eines Fortdruckzustandes eines Druckwerkes
US5770852A (en) * 1996-08-29 1998-06-23 Heidelberger Druckmaschinen Ag Plate scanning device having light funnels with an adjustable aperture
DE19703129B4 (de) * 1997-01-29 2014-08-21 Heidelberger Druckmaschinen Ag Verfahren zur Bewertung der Qualität eines im Mehrfarbendruck auf einem Bedruckstoff erzeugten Druckbildes
DE19711918B4 (de) * 1997-03-21 2011-07-21 Heidelberger Druckmaschinen AG, 69115 Verfahren zum Einstellen der Farbschichtdicke beim Aufbringen von Druckfarbe auf einen Bedruckstoff
US6081340A (en) * 1997-03-31 2000-06-27 Xerox Corporation Image processing method to reduce marking material coverage with non-linear specifications
US6024018A (en) * 1997-04-03 2000-02-15 Intex Israel Technologies Corp., Ltd On press color control system
US5967049A (en) * 1997-05-05 1999-10-19 Quad/Tech, Inc. Ink key control in a printing press including lateral ink spread, ink saturation, and back-flow compensation
US6318260B1 (en) 1997-05-05 2001-11-20 Quad/Tech, Inc. Ink key control in a printing press including lateral ink spread, ink saturation, and back-flow compensation
DE19826810A1 (de) 1998-06-16 1999-12-23 Koenig & Bauer Ag Verfahren und Einrichtung zur Farbzufuhr
DE10028317A1 (de) 1999-06-21 2000-12-28 Heidelberger Druckmasch Ag Verfahren zur Steuerung der Zufuhr von Druckfarbe in einer Druckmaschine und Druckmaschine zur Durchführung des Verfahrens
JP4197379B2 (ja) * 1999-09-07 2008-12-17 株式会社小森コーポレーション 多色印刷機のインキ供給量調整方法および装置
DE10056248A1 (de) 1999-12-06 2001-06-07 Heidelberger Druckmasch Ag Verfahren zum Steuern der Farbmenge in einem Farbwerk
DE10056247B4 (de) * 1999-12-06 2011-07-21 Heidelberger Druckmaschinen AG, 69115 Verfahren zum Steuern der Farbmenge in einer Druckmaschine
DE10105990A1 (de) * 2000-03-03 2001-09-06 Heidelberger Druckmasch Ag Verfahren zum Steuern einer Farbschicht auf der Druckform einer Druckmaschine
DE10152470B4 (de) * 2000-11-23 2014-08-14 Heidelberger Druckmaschinen Ag Verfahren zur Farbvoreinstellung beim Mehrfarbendruck
DE10159698B4 (de) * 2000-12-14 2015-03-26 Heidelberger Druckmaschinen Ag Verfahren zum Einstellen einer Farbmenge, die einem Druckzylinder einer Druckmaschine zugeführt wird
DE10245702A1 (de) * 2001-10-25 2003-05-08 Heidelberger Druckmasch Ag Anpassung der Farbsteuerung an die physikalischen Eigenschaften von Farbe und Bedruckstoff
DE10312998B4 (de) * 2002-04-03 2015-07-09 Heidelberger Druckmaschinen Ag Lernende Farbführung
JP4024593B2 (ja) * 2002-05-22 2007-12-19 大日本スクリーン製造株式会社 インキ供給制御装置および印刷装置
US7032508B2 (en) * 2003-03-21 2006-04-25 Quad/Tech, Inc. Printing press
JP2005088541A (ja) * 2003-09-19 2005-04-07 Komori Corp 印刷機の洗浄方法および装置
US20050135677A1 (en) * 2003-12-22 2005-06-23 Seevers Timothy S. Method and apparatus for acquiring image data from a scanned document
DE102004011239C5 (de) 2004-03-09 2023-07-27 manroland sheetfed GmbH Verfahren zur automatischen Farbvoreinstellung an mindestens einem Farbwerk einer Druckmaschine
DE102005007780A1 (de) * 2005-02-19 2006-08-31 Man Roland Druckmaschinen Ag Vorrichtung und Verfahren zur Messung der zonalen Farbgebung
DE102006014657B4 (de) 2006-03-28 2008-11-20 Koenig & Bauer Aktiengesellschaft Verfahren zur Farbregelung einer Druckmaschine
DE102006022529B4 (de) * 2006-05-15 2009-05-20 Koenig & Bauer Aktiengesellschaft Rollenrotationsdruckmaschine mit mindestens einem Farbwerk und mit einem Inline-Inspektionssystem
DE102006022530B4 (de) * 2006-05-15 2014-06-26 Koenig & Bauer Aktiengesellschaft Rollenrotationsdruckmaschine mit mindestens einem Farbwerk und mit einem Inline-Inspektionssystem
DE102009027383A1 (de) * 2009-07-01 2011-01-05 Manroland Ag Verfahren zur Bestimmung von Voreinstellparametern für ein Farbwerk
DE102022128113A1 (de) * 2021-12-14 2023-06-15 Heidelberger Druckmaschinen Aktiengesellschaft Reibwalzensteuerung

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EP0143228A1 (fr) * 1983-09-21 1985-06-05 Albert-Frankenthal AG Procédé et dispositif de réglage des organes de dosage des zones d'encrage d'un encrier
EP0143744B1 (fr) * 1983-11-04 1988-01-13 GRETAG Aktiengesellschaft Procédé et dispositif d'analyse de qualité d'impression et/ou de réglage d'encre dans une rotative offset et rotative offset équipée d'un tel dispositif
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Publication number Priority date Publication date Assignee Title
US5662044A (en) * 1995-02-24 1997-09-02 Heidelberger Druckmaschinen Ag Offset printing method
EP1167033A1 (fr) * 2000-06-28 2002-01-02 Heidelberger Druckmaschinen Aktiengesellschaft Procédé pour prérégler un dispositif d'encrage
US8826819B2 (en) 2008-08-22 2014-09-09 Heidelberger Druckmaschinen Ag Method for controlling inking units and/or dampening units
EP2272670A1 (fr) * 2009-07-01 2011-01-12 manroland AG Procédé de détermination de paramètres de préréglage pour une unité d'encrage

Also Published As

Publication number Publication date
DE59103250D1 (de) 1994-11-24
DE4004056A1 (de) 1991-08-14
CA2035647A1 (fr) 1991-08-11
EP0442322B1 (fr) 1994-10-19
JPH054330A (ja) 1993-01-14
US5170711A (en) 1992-12-15

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