WO2020160886A1 - Procédé de réglage d'un profil d'encre d'une machine d'impression offset de feuilles au moyen à freuilles de rebut pré-imprimées - Google Patents

Procédé de réglage d'un profil d'encre d'une machine d'impression offset de feuilles au moyen à freuilles de rebut pré-imprimées Download PDF

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Publication number
WO2020160886A1
WO2020160886A1 PCT/EP2020/051012 EP2020051012W WO2020160886A1 WO 2020160886 A1 WO2020160886 A1 WO 2020160886A1 EP 2020051012 W EP2020051012 W EP 2020051012W WO 2020160886 A1 WO2020160886 A1 WO 2020160886A1
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WO
WIPO (PCT)
Prior art keywords
sheet
sheets
good
offset printing
control unit
Prior art date
Application number
PCT/EP2020/051012
Other languages
German (de)
English (en)
Inventor
Stefan Budach
Felix Hartmann
Michael Köllmann
Harald Willeke
Original Assignee
Koenig & Bauer 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 Koenig & Bauer Ag filed Critical Koenig & Bauer Ag
Priority to EP20701173.5A priority Critical patent/EP3921164B1/fr
Priority to ES20701173T priority patent/ES2940706T3/es
Publication of WO2020160886A1 publication Critical patent/WO2020160886A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F7/00—Rotary lithographic machines
    • B41F7/16—Rotary lithographic machines for printing on non-deformable material, e.g. sheet metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/04—Ducts, containers, supply or metering devices with duct-blades or like metering devices
    • B41F31/045—Remote control of the duct keys
    • 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
    • B41F33/0045—Devices for scanning or checking the printed matter for quality control for automatically regulating the ink supply
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2233/00—Arrangements for the operation of printing presses
    • B41P2233/10—Starting-up the machine
    • B41P2233/11—Pre-inking

Definitions

  • the invention relates to methods for setting a color profile in one
  • a method for setting an area coverage is known from WO 2010/091947 A1, the area coverage being provided by one on a printing substrate
  • the amount of printing ink transferred to the inking unit of a printing machine takes place, with an ink supply to the inking unit being switched off at least in zones or interrupted in the inking unit when a final phase of a printing process previously carried out by the printing machine is reached, with the amount remaining on the substrate side after switching off or interrupting the ink supply in the inking unit
  • the printing ink is still transferred to the printing material in the final phase of the printing process previously carried out by the printing machine until the area coverage that takes place with the amount of printing ink transferred to the printing material corresponds to a target value for the area coverage, with a changeover of the printing machine from the one in this printing machine running printing process is carried out on a subsequent printing process in an automated control process, from which
  • Inking unit in the subsequent printing process the same printing ink is transferred to the printing material as in the previous printing process, the target value being the
  • the metering elements and the length of the color strip are compared with the values entered in a second memory of the computer for the zone-wise setting of the color metering elements and the length of the color strip of the following print job and the zonal difference color quantities are formed from the values per color zone, which are supplemented by the zonal memory quantities of the inking unit are transported back from the rotating inking unit into the ink fountain or conveyed into the inking unit, depending on whether the difference in ink amount is positive or negative, with the number of inking unit revolutions required for this beforehand to compensate for the zonal
  • Differential amounts of ink is determined and only afterwards the setting of the ink metering elements and the length of the color strip to be transferred into the inking unit, which is required for the subsequent print job in the inking unit, is carried out, with this setting neither conveying color from the inking unit nor into the inking unit.
  • Sheet-fed printing machines known, with a sheet-fed printing machine in one
  • Printing pass a sheet stack is laid out, which at least one
  • waste sheet Contains waste sheets and wherein the sheets of this sheet stack are printed in a subsequent printing pass, the waste sheet in the following
  • Sheet-fed printing machine is detected, this memory or sensor device interacting with a machine control, which the sheet-fed printing machine during the following printing pass depending on the memory or
  • the invention is based on the object of creating a method for setting a color profile in a sheet-fed offset printing machine.
  • the advantages that can be achieved with the invention are, in particular, that the printing machine can be changed over from a first printing process currently running in the printing machine to a subsequent, second printing process, quickly and economically.
  • machine and operating costs can also be reduced because the printing machine with the subsequent second printing process is already in the good production for salable printed products after a very short time.
  • FIG. 1 schematically shows a sheet-fed offset printing machine
  • FIG. 3 shows the time sequence of a method for setting a color profile in the sheet-fed offset printing press to be set for a new print job.
  • This printing ink which adjusts the transport path of the printing ink, is transverse to a transport direction of the printing material transported through the printing machine and to be printed in the process.
  • d. R. unevenly, d. H. it is formed along a cutting line of the running transversely to the transport direction of the printing material
  • the transport path of the printing ink leads, starting from an ink metering system belonging to an inking unit of the printing machine, through that of the relevant one
  • Ink metering system supplied with printing ink via a z. B. arranged on one of the printing unit cylinders belonging to a printing unit of the printing machine up to the printing material to be printed with the relevant printing ink.
  • a printing machine In a printing machine, several printing units, each lined up in a row and each having their own inking unit, are provided along the transport path of the printing material in its transport direction, with at least two of these printing units being used to transfer different printing inks to the same printing material transported through the printing machine. Both sides of the
  • a printing machine producing a printed product in multicolor printing can run along the transport path of the printing material.
  • B. print with the printing inks cyan, magenta, yellow and black.
  • the inking of the respective printing unit is z. B. designed as a roller inking unit, z. B. as a lifter inking unit or as a film inking unit, these types of inking units are known to those skilled in the art.
  • the paint dosing system e.g. B. an ink fountain, which supplies the relevant inking unit with printing ink, has z. B.
  • an ink ductor rotatable about its longitudinal axis and at least one metering element;
  • a plurality of zone-wise adjustable ink metering elements or metering elements are provided transversely to the transport direction of the printing material, in particular each controllable by means of an adjusting element.
  • B. are designed as in a distance range of a few tenths of a millimeter to the ink ductor variable distance arranged ink knife.
  • At least one of the inking unit belonging to the inking roller transmits the provided by the inking unit, z. B. in the arranged transversely to the transport direction of the printing material zones of the ink metering system in particular differently dosed printing ink on the at least one printing form, the z. B. is arranged on the forme cylinder assigned to this inking unit.
  • Printing machine currently running printing process is required for a subsequent second printing process, which cancel out the distribution of the printing ink to be transferred from an inking unit to the printing material to be printed in the printing machine during the execution of the first printing process along the transport path.
  • a subsequent second printing process which cancel out the distribution of the printing ink to be transferred from an inking unit to the printing material to be printed in the printing machine during the execution of the first printing process along the transport path.
  • At least individual rollers preferably all rollers of the relevant
  • Washed inking system Washed inking system and thus from remaining, d. H. freed of leftover ink from the first printing process.
  • the relevant inking unit is adjusted to the dosage and transport of the printing ink required to carry out the subsequent second printing process. This procedure requires a lot of time and leads to a high consumption of printing ink.
  • a further procedure consists in stopping an ink supply from the relevant ink metering system to the inking unit or at least interrupting it in the inking unit when a final phase of the first printing process previously carried out by the printing machine is reached, with the inking unit after switching off or interrupting the ink supply
  • the amount of printing ink remaining on the printing material side in the final phase of the printing process previously carried out by the printing machine continues, for. B. is still transferred to the printing material for a certain time, in particular until the remaining ink from the first printing process in the inking unit is at least almost used up.
  • One such Procedure is e.g. B. from DE 10 2008 029 998 A1. With this blank printing of the inking unit, waste is generated to a not inconsiderable extent. This procedure is also time-consuming.
  • the distribution of the printing ink, which originates from the first printing process and is perpendicular to the transport direction of the printing material is in principle retained, which can have an unfavorable effect on the subsequent second printing process.
  • Printing process consciously with the originating from the first printing process, transversely to the transport direction of the printing material existing distribution of the printing ink, wherein during the proof of the subsequent second printing process resulting from the first printing process dosage of z. B. in the respective transverse to
  • the required dosage is adapted to the printing process. This procedure then leads to difficulties if, in one zone or in several zones, the area coverage of the new second printing process to be generated therein is partially or completely very low compared to the previous first printing process. In this case, the removal of the excess printing ink in the relevant zone must be carried out entirely via the printing process, i.e. H. the second printing process. This can take a long time and lead to a not inconsiderable amount of waste.
  • Printing process on the at least one printing form and / or the printing ink remaining on the lateral surface of the transfer cylinder is at least almost used up.
  • the distribution of the printing ink originating from the first printing process and transversely to the transport direction of the printing material is retained, which can have an unfavorable effect on the subsequent second printing process.
  • Waste sheets sometimes even over 400 waste sheets can be generated.
  • This high number of waste sheets is when using high-priced substrates such.
  • high-priced should mean that every single unprinted sheet intended as printing material costs a few euros, so that a three-digit number of sheets that has been used up to the production-ready setting of the sheet-fed printing machine is an expensive matter and has a significant negative impact, especially with smaller print jobs beats.
  • Sheet-fed offset printing machine brings it into the target coloration in each case much faster and with considerably less sheet waste when it is first printed after starting production or when printing after a job change.
  • the aim is to save material costs when using high-priced printing materials by reducing the amount of waste as well as unproductive machine time and labor costs by shortening the printing phase. It is too
  • Every sheet-fed offset printing machine has a certain time constant for its reaction to a changed setting of ink zone openings on an inking unit, which is a certain number of times
  • Sheet-fed offset printing machine transported sheets, d. H. Print sheet corresponds. React to a changed setting of the ink zone openings on an inking unit
  • Print sheets are recorded, typically in the form of an exponential function.
  • a sheet-fed offset printing machine up to now 100 to 150 printed sheets have usually been printed until, after a changed setting of ink zone openings on an inking unit, new printed sheets colored with this changed setting appear
  • Fig. 1 shows an example of a detail from a sheet-fed offset printing machine 01, shown only schematically, with several, z. B. four in the transport direction T of a printed sheet 02, in particular one z. B. formed as a sheet metal sheet 02, lined up printing units 03, wherein the printed sheets 02 are guided one after the other along a transport path through this sheet-fed offset printing machine 01.
  • Each of these printing units 03 has an inking unit 04.
  • the respective inking unit 04 has a z. B. an ink fountain 06 and an ink ductor 07 having ink metering system as well as in a roller train transporting printing ink z. B. at least one ink transfer roller 08, possibly an ink lifter 14 and at least one, preferably several, z. B.
  • the other printing units 03 are constructed accordingly.
  • a different printing ink can be transferred to the same printing sheet 02.
  • the relevant inking unit 04 which provides the relevant printing ink, has a plurality of printing sheets 02, each lined up at right angles to the transport path
  • each one of a control unit 16 or regulating device 16 set or at least adjustable ink metering element for metering the amount of printing ink to be applied to the printing sheet 02 in the relevant ink zone.
  • the respective paint dosing system d. H. whose metering elements or paint metering elements and / or whose paint ductor 07 is z. B.
  • the ink supply to the relevant inking unit 04 with regard to the amount of printing ink to be supplied to the relevant printed sheet 02 can be adjusted zone by zone.
  • At least one is directed towards the transport path of the respective printed sheet 02
  • Detection device 17 arranged. During the production of this sheet-fed offset printing machine 01, the relevant detection device 17 detects at least one color density of at least one print image generated on the relevant printed sheet 02. B. densitometric and derives their respective at least one measured value as one
  • the at least one detection device 17 receives a colorimetric value of at least one print image generated on the printed sheet 02, e.g. B. detected spectrophotometrically.
  • the detection device 17 or one of the detection devices 17, for. B. be designed as an inline inspection system
  • the relevant detection device 17 z. B. has at least one camera, in particular an electronic, preferably video-optical camera, with which the relevant detection device 17 of the print image generated on the printed sheet 02 by a photographic image z.
  • B. records a sequence of images. From the recorded image, ie the recorded image, the control unit 16 or regulating device 16 can, for. B.
  • the respective color density and / or at least one colorimetric value preferably of all the printing inks involved in the structure of the print image in question z. B. be determined by separation. It can e.g. B. be provided that several printing units 03 each have at least one z. B. is assigned detection device 17 optimized for a specific printing ink.
  • the detection device 17 is the printed sheet 02 in the transport direction T
  • the output of the respective printing unit 03 is arranged.
  • the detection device 17 detects z. B. the color density and / or at least one colorimetric value directly in the relevant print image or in a color measuring strip formed on the relevant printed sheet 02, with several color measuring fields preferably being arranged next to one another or in a row in the relevant color measuring strip.
  • the measured value detected by the relevant detection device 17 forms an actual value for a z. B. on the basis of its color density detectable area coverage of at least one printing ink transferred to the relevant printed sheet 02.
  • Area coverage denotes a z. B. percentage specified degree of coverage of the printing material with at least one of the printing ink applied to this printing material in the printing process, the information on the area coverage on a total area of the print image or on a partial area thereof, z. B. can be related to only a single zone running through the print image in the form of a strip.
  • the setting of the Area coverage takes place in particular with reference to several different partial areas of the same print image, preferably arranged in parallel stripes, the associated area coverage being set for several, in particular for each of these partial areas.
  • the control unit 16 or regulating device 16 is connected in terms of data technology at least to a storage device 18 and possibly also to an operating device 19, with at least one target value for the area coverage and / or the color density and / or the at least one colorimetric value being stored in the storage device 18 , wherein the respective actual value and nominal value of the area coverage and / or the color density and / or the at least one colorimetric value relate to the same total area or partial area of the relevant print image.
  • the operating device 19 is used for manual input of values and / or control commands to the control unit 16 or regulating device 16.
  • control unit 16 or regulating device 16, the storage device 18 and the computing unit 19 can be formed in the same assembly, which is indicated in FIG. 1 by a dashed border, this assembly as a
  • Color regulator 24 can be designated. This assembly or at least some of its components can be used for data purposes with a control station 21 belonging to the sheet-fed offset printing machine 01, i.e. H. with a higher-level control unit, connected or designed or arranged integrated in the control station 21. With the control station 21 is z. B. a display device 23 connected for data purposes, on which at least one image captured by the relevant capture device 17 of one of the printed sheets 02 inked in the sheet-fed offset printing press 01 is displayed.
  • FIG. 2 shows the relevant print image on a print sheet 02 of a currently executed printing process (order A) in the left column of FIG. 2 and the corresponding print image on a print sheet 02 of a new one in the right column of FIG subsequent printing process (job B) is shown.
  • order A the relevant print image on a print sheet 02 of a currently executed printing process
  • job B the corresponding print image on a print sheet 02 of a new one in the right column of FIG subsequent printing process
  • Sheet-fed offset printing machine 01 described with which the sheet-fed offset printing machine 01 is transferred from a printing process currently running in this printing machine to a subsequent printing process, especially when using high-priced printing materials, e.g. B. of sheet metal, can be converted quickly and inexpensively.
  • this sheet-fed offset printing machine 01 several printed sheets 02 - hereinafter referred to as sheets 02 for short - are guided one after the other along a transport path through this sheet-fed offset printing machine, these sheets 02 being colored with at least one printing ink on the transport path.
  • the sheet-fed offset printing press 01 has at least one inking unit 04 providing the relevant printing ink, each with a plurality of them across the transport path of the sheets 02
  • control unit 16 sets the color profile applicable for this inking unit 04 by setting the respective ink metering elements of the relevant inking unit 04.
  • the setting of the respective ink metering elements of the relevant inking unit 04 is carried out with the aim of the relevant inking unit 04 printing the sheets 02 in a continuous printing of the sheet-fed offset printing machine 01 each with one
  • the target color is colored.
  • the control unit 16 iteratively sets the respective color profile applicable to the respective inking unit 04 for its target color based on color density values and / or colorimetric values recorded on several of these sheets 02 and based on a recorded image of a print image applied to the respective sheet 02 a.
  • the respective color density values and / or the respective colorimetric values and also the respective image of the relevant print image applied to the respective sheet are each given at least one connected to the control unit 16 at least in terms of data technology in the
  • this sheet-fed offset printing machine 01 Up to the start of the run of this sheet-fed offset printing machine 01 producing salable printed sheets 02, several packets of sheets 02 composed of different quantities of waste sheets and / or good sheets are guided along the transport path through this sheet-fed offset printing machine 01.
  • preprinted sheets 02 each with a print image from a previous print job that deviates from the print run of the sheet-fed offset printing machine 01 are used as waste sheets, and sheets 02 that are unprinted as good sheets are used.
  • At least the following packs of sheets 02 are now guided one after the other through this sheet-fed offset printing machine 01, a sheet metal plate preferably being used as waste sheet and / or as good sheet: a) a first package of sheets 02 consisting of several waste sheets, b) a second package consisting of at least one good sheet, and c) at least one third package of sheets 02 each with several waste sheets and each with at least one good sheet.
  • the waste sheets of the first package and the good sheet or sheets of the second package are each colored according to the color profile not corresponding to the target color, of which the control unit 16 when setting the color profile of the at least one inking unit 04 when converting z. B. after a job change or when printing the sheet-fed offset printing machine 01 goes out, so with a color profile, which z. B. the coloring of sheet 02 one of the current ones
  • the print job to be set corresponds to the previous print job.
  • the control unit 16 recognizes the at least one good sheet of the second package either according to a z. B. manual input made by an operator of the sheet-fed offset printing machine 01 on the operating device 19 connected to the control unit 16 in terms of data technology or, in a higher technical expansion stage, automatically as a good sheet. With the detection of the good sheet or sheets, the control unit 16 defines a respective position of several color measurement fields, each position of these color measurement fields being arranged in one of the ink zones of the relevant inking unit 04. Following the second packet of sheets 02 passed through the sheet-fed offset printing machine 01, the control unit 16 detects the further sheets 02 passed through this sheet-fed offset printing machine 01 by means of the relevant detection device 17 to the respective one
  • control unit 16 with the relevant detection device 17 detects at the latest at the beginning of the sheets 02 of the second package of the through the
  • Sheet-fed offset printing machine 01 each sheet 02 guided is an image of the print image applied to the respective sheet 02.
  • the control unit 16 stores a master image with the recognition of the good sheet or sheets of the second package, the master image having at least one contour of the print image to be created on the sheet 02 in the production run of the sheet-fed offset printing machine 01.
  • the control unit 16 compares the respective images captured by the respective detection device 17 of the sheets 02 fed through the sheet-fed offset printing machine 01 following the second package with the master image, the control unit 16 checking these further sheets 02 for the presence of a print image corresponding to the master image checks.
  • the control unit 16 evaluates sheets 02 with one corresponding to the master image
  • control unit 16 then allows sheets 02, which are evaluated as waste sheets, in the formation of the respective color profile is set by the control unit 16 following the second bundle of sheets 02 passed through the sheet-fed offset printing press 01,
  • control unit 16 iteratively sets the respective color profile on the relevant inking unit 04 on the basis of the respective color density values and / or colorimetric values recorded from each good sheet up to
  • control unit 16 receives the respective image of at least one or more good sheets of the second package
  • the print image is stored and connected to the control unit 16
  • Display device 23 displays.
  • control unit 16 determines the respective good sheets of the third package from several in each case at the same positions by means of color density values and / or recorded with the relevant detection device 17
  • colorimetric values each have a mean value and uses these mean values to set the respective color profile.
  • the master image can be created by the control unit 16 such that the
  • Control unit 16 reduces the resolution, given by its number of pixels, of the relevant originally captured image of the good sheet or sheets of the second package and uses the remaining number of pixels as an image signature representing the master image, the control unit using the image signature representing the master image to check the presence of a print image corresponding to this master image is used on sheets 02 guided along the transport path through the sheet-fed offset printing machine 01 after the master image has been created.
  • the control unit 16 forms the respective one
  • the master image can be formed from the respective image of the good sheet or sheets of the second package, or it is used as a master image, for example.
  • control unit 16 after the formation of the
  • Master image for sheets 02 subsequently guided through this sheet-fed offset printing machine 01 sets an axial register and / or a circumferential register and / or a color register.
  • control unit 16 i. d.
  • enter the respective color profile which is set at the end of the last third pack of sheet 02, on the relevant inking unit 04 as the color profile applicable for the production run.
  • waste sheets typically 40 to 50 waste sheets are used for the first package. At least these waste sheets of the first package form what is known as leading waste for basic inking of the sheets 02 after the respective printing ink has run into the relevant inking unit 04. B. 10 to 15 sheets 02 are used, the control unit 16 only using the sheets recognized as good sheets in each of these third packets, the respective color profile is improved, until the coloring of the sheets 02 achieved corresponds to the respective color profile applicable to the target coloring within the previously defined permissible tolerance limits.
  • the color profile that applies to the target coloring is accordingly set and / or adjusted step-by-step by the control unit 16 on the basis of the recognized good sheets serving as support points.
  • the method proposed here takes into account, on the one hand, that as a reaction to a changed setting of ink zone openings on a sheet 02 inked in the sheet-fed offset printing machine 01 with this changed setting on an inking unit 04, color density values recorded cannot change suddenly or abruptly, but that these color density values can only change after one specific time, d. H. reach a new stable state after a certain machine running time.
  • the method proposed here succeeds in achieving the setting of the color profile applicable for the target inking with only the smallest possible number of high-priced sheets 02.
  • Sheet-fed offset printing machine 01 used when converting to a
  • Good sheet takes place by means of image recognition and / or that the evaluation of the respective coloring of the recognized good sheet takes place on the basis of color density values and / or colorimetric values recorded on these good sheets.
  • Sheet-fed offset printing machine 01 after a job change or the printing of a new print job begins.
  • the proposed method starts with the fact that, for. B. at a feeder
  • Sheet-fed offset printing machine 01 already provided with a print image from at least one previous printing process, d. H.
  • printed and in each case not intended for sale waste sheets are guided through the sheet-fed offset printing machine 01 and through the at least one inking unit 04 of this
  • Sheet offset printing machine 01 are colored. This is a first package P1 of sheet 02 with z. B. 40 to 50 waste sheets that are successively passed through this sheet-fed offset printing machine 01. At time t0, a color profile no longer corresponding to the previous print job, but in any case not yet corresponding to the target color of the new print job, is set on the relevant inking units 04. During the phase of the sheet-fed offset printing machine 01 which inks the first package P1 of sheets 02, there is an inflow of printing ink generally not reduced or even stopped for the respective inking unit 04.
  • a respective position of several color measurement fields is also established with reference to the sheets 02 of the new print job to be processed, at which, in the case of further sheets 02 guided through the sheet-fed offset printing machine 01, a sheet-fed offset printing machine 01 arranged in this and with a control unit
  • Detection device 17 whose respective color density values and / or colorimetric values are detected. From the time t1 at the latest, the above-mentioned or another detection device 17 is used to transfer the sheets 02 of the second package P2 and all others guided through this sheet-fed offset printing press 01 through the
  • Sheet 02 guided sheet offset printing machine 01 each captures an image of the print image applied to the respective sheet 02. With the detection of the good sheet or sheets of the second package P2, the
  • Control unit 16 stores a master image, the master image having at least one contour of the print image to be created on sheet 02 in the production run of sheet-fed offset printing machine 01 according to the new print job to be processed. From time t2, the control unit 16 compares the respective detection device with the relevant detection device
  • control unit 16 captured images of the subsequent to the second packet P2 by the Sheet-fed offset printing machine 01 each guided sheet 02 with the stored master image, the control unit 16 checking these further sheets 02 for the presence of a print image corresponding to the master image. In this check, the control unit 16 evaluates sheet 02 with a print image corresponding to the master image as a good sheet and sheet 02 with a print image not corresponding to the master image as a waste sheet. At time t2, the control unit 16 also begins iteratively the respective color profile on the relevant inking unit 04 based on the respective color density values and / or colorimetric values recorded from good sheets until it corresponds to the respective color profile applicable to the target color
  • Sheet-fed offset printing machine 01 are performed.
  • the respective color profile which is generated by the control unit 16 following the second by the
  • Sheet-fed offset printing machine 01 the package P2 of sheets 02, that is to say is set from time t2, does not take into account sheets 02 that it considers to be waste sheets. Only the sheets 02 recognized by the control unit 16 as good sheets each serve as support points for the step-by-step setting of the respective color profile applicable to the target inking.
  • Sheet offset printing machine 01 have been performed and the respective color profile has been set based on the sheet 02 recognized as a good sheet in increasingly better correspondence with the color profile applicable for the target inking, it is assumed that the sheet-fed offset printing machine 01 will continue printing at time t3 and the control unit 16 switches on and / or the color regulator 24 in a corresponding operating mode.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Quality & Reliability (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Making Paper Articles (AREA)

Abstract

L'invention concerne un procédé de réglage d'un profil d'encre d'une machine d'impression offset à feuilles (01), dans lequel des feuilles de rebut pré-imprimées et de bonnes feuilles non imprimées sont utilisées lors de la conversion après un changement de travail ou lors de l'impression de la machine d'impression offset à feuilles (01) en question, dans lequel au moins une bonne feuille est passée de manière répétée à travers la machine d'impression offset à feuilles (01) après chacune de plusieurs feuilles de rebut et les feuilles de rebut et les bonnes feuilles sont chacune encrées au moyen d'au moins une unité d'encrage (04) comportant chacune plusieurs zones d'encre, dans lequel les bonnes feuilles encrées sont détectées dans la machine d'impression offset à feuilles (01) conformément à une entrée manuelle, effectuée par un opérateur de la machine d'impression offset à feuilles (01), sur un dispositif de commande (19) ou automatiquement comme telles, dans lequel le profil d'encre est défini au moyen d'un contrôleur de couleur (24), le réglage du profil d'encre étant effectué au moyen du contrôleur d'encre (24) après détection et évaluation de la coloration respective des seules bonnes feuilles détectées. Une feuille de métal est de préférence utilisée comme feuille de rebut et/ou comme bonne feuille.
PCT/EP2020/051012 2019-02-05 2020-01-16 Procédé de réglage d'un profil d'encre d'une machine d'impression offset de feuilles au moyen à freuilles de rebut pré-imprimées WO2020160886A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20701173.5A EP3921164B1 (fr) 2019-02-05 2020-01-16 Procédé de réglage d'un profil colorimétrique dans une presse offset à feuilles utilisant des feuilles préimprimées de rebut
ES20701173T ES2940706T3 (es) 2019-02-05 2020-01-16 Procedimiento para el ajuste de un perfil de tinta en una máquina de impresión offset de pliegos por medio de pliegos de desecho preimpresos

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DE102019102762.4A DE102019102762A1 (de) 2019-02-05 2019-02-05 Verfahren zur Einstellung eines Farbprofils in einer Bogenoffsetdruckmaschine
DE102019102762.4 2019-02-05

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DE3707695A1 (de) 1987-03-11 1988-09-22 Heidelberger Druckmasch Ag Verfahren zur definierten erzeugung einer dem fortdruck nahen farbverteilung im farbwerk von rotationsdruckmaschinen
DE102008029998A1 (de) 2007-07-11 2009-01-15 Manroland Ag Abfördern von Druckfarbe
DE102008041430A1 (de) * 2008-08-21 2010-02-25 Koenig & Bauer Aktiengesellschaft Verfahren zur Prüfung zumindest eines in einem laufenden Druckprozess einer Druckmaschine ermittelten Messwertes auf seine Plausibilität
WO2010091947A1 (fr) 2009-02-16 2010-08-19 Koenig & Bauer Aktiengesellschaft Procédé de réglage d'une couverture et procédé correspondant de mise en œuvre dans une presse d'imprimerie comprenant plusieurs groupes d'impression
DE102010003385A1 (de) * 2010-03-29 2011-09-29 Koenig & Bauer Aktiengesellschaft Verfahren zum Durchführen eines Auftragswechsels an Bogendruckmaschinen
DE102010003913A1 (de) 2010-04-13 2011-10-13 Koenig & Bauer Aktiengesellschaft Verfahren zum Betreiben von Bogendruckmaschinen und eine Bogendruckmaschine zum Bedrucken von Bogen
DE102013217099A1 (de) 2012-08-30 2014-03-06 Koenig & Bauer Aktiengesellschaft Verfahren zum Erkennen eines Auftragswechsels in einem Stapel und Verwendung eines zumindest teilweise unbedruckten Bogens zum Erkennen einer Trennstelle zwischen zwei Aufträgen
DE102017202937A1 (de) * 2017-02-23 2018-08-23 Koenig & Bauer Ag Verfahren zur Steuerung einer mit einer Druckmaschine datentechnisch verbundenen Anzeigeeinrichtung

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3707695A1 (de) 1987-03-11 1988-09-22 Heidelberger Druckmasch Ag Verfahren zur definierten erzeugung einer dem fortdruck nahen farbverteilung im farbwerk von rotationsdruckmaschinen
DE102008029998A1 (de) 2007-07-11 2009-01-15 Manroland Ag Abfördern von Druckfarbe
DE102008041430A1 (de) * 2008-08-21 2010-02-25 Koenig & Bauer Aktiengesellschaft Verfahren zur Prüfung zumindest eines in einem laufenden Druckprozess einer Druckmaschine ermittelten Messwertes auf seine Plausibilität
WO2010091947A1 (fr) 2009-02-16 2010-08-19 Koenig & Bauer Aktiengesellschaft Procédé de réglage d'une couverture et procédé correspondant de mise en œuvre dans une presse d'imprimerie comprenant plusieurs groupes d'impression
DE102010003385A1 (de) * 2010-03-29 2011-09-29 Koenig & Bauer Aktiengesellschaft Verfahren zum Durchführen eines Auftragswechsels an Bogendruckmaschinen
DE102010003913A1 (de) 2010-04-13 2011-10-13 Koenig & Bauer Aktiengesellschaft Verfahren zum Betreiben von Bogendruckmaschinen und eine Bogendruckmaschine zum Bedrucken von Bogen
DE102013217099A1 (de) 2012-08-30 2014-03-06 Koenig & Bauer Aktiengesellschaft Verfahren zum Erkennen eines Auftragswechsels in einem Stapel und Verwendung eines zumindest teilweise unbedruckten Bogens zum Erkennen einer Trennstelle zwischen zwei Aufträgen
DE102017202937A1 (de) * 2017-02-23 2018-08-23 Koenig & Bauer Ag Verfahren zur Steuerung einer mit einer Druckmaschine datentechnisch verbundenen Anzeigeeinrichtung

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