EP0394681A2 - Procédé pour contrôler l'encrage dans une machine d'impression avec limitation de l'épaisseur de la couche d'encre et de l'augmentation de la valeur tonale - Google Patents

Procédé pour contrôler l'encrage dans une machine d'impression avec limitation de l'épaisseur de la couche d'encre et de l'augmentation de la valeur tonale Download PDF

Info

Publication number
EP0394681A2
EP0394681A2 EP90105665A EP90105665A EP0394681A2 EP 0394681 A2 EP0394681 A2 EP 0394681A2 EP 90105665 A EP90105665 A EP 90105665A EP 90105665 A EP90105665 A EP 90105665A EP 0394681 A2 EP0394681 A2 EP 0394681A2
Authority
EP
European Patent Office
Prior art keywords
ztol
color
tolerance
location
dot gain
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
EP90105665A
Other languages
German (de)
English (en)
Other versions
EP0394681B1 (fr
EP0394681A3 (fr
Inventor
Nikolaus Pfeiffer
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen 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 Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0394681A2 publication Critical patent/EP0394681A2/fr
Publication of EP0394681A3 publication Critical patent/EP0394681A3/fr
Application granted granted Critical
Publication of EP0394681B1 publication Critical patent/EP0394681B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B41F33/0036—Devices for scanning or checking the printed matter for quality control
    • 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
    • B41P2233/50—Marks on printed material
    • B41P2233/51—Marks on printed material for colour quality control

Definitions

  • the invention relates to a method for ink guide control of a printing press, wherein a printed sheet printed by the press is photoelectrically measured in a number of test areas, the measured values obtained are processed in connection with target values for control data, and the color guide of the printing press takes place on the basis of these control data.
  • the control of the color guidance in the running printing process is the most important possibility to influence the coloring and thus the image impression.
  • the aim of the color guide control is to achieve the best possible color match between the original and the print / production run.
  • the control of the color guidance according to colorimetric variables is to be regarded as a significant improvement, since a regulation in the sense of a comparison of target and actual values of a color location corresponds in a good approximation to the color perception of the human eye.
  • EP-OS 0 228 347 Spectral measurements of the remissions of color measurement fields, the mathematical conversion of these measurement values into colorimetric quantities and furthermore in control data for adjusting the color guide elements of a printing press are known.
  • EP-OS 0 228 347 also specifies a method for controlling the color guidance of the printing machine.
  • the spectral remissions are used for color matching between the original and the print / production run in the color measuring fields printed by the printing press measured and the corresponding color coordinates determined.
  • the color difference between the target and actual color coordinates is determined by comparison with the target remissions or the target color coordinates and converted into changes in the layer thicknesses of the printing inks.
  • the color guide elements are controlled in accordance with these calculated changes in the layer thicknesses of the individual printing inks in such a way that the total color difference between the actual and the target color location in the corresponding color space is minimal.
  • the quality of the color guide control in both processes is limited by the fact that procedural limit values are ignored in offset printing.
  • a determined target color location remains during the entire printing process and is controlled, even if the maximum or minimum permissible layer thicknesses of one or more printing inks are exceeded or undershot.
  • Maximum or minimum permissible layer thickness is understood here to mean the layer thickness at which the associated enlargement of the halftone dots of a printing ink leads to impermissible tonal values.
  • the target color location can only be achieved with direct control if the maximum layer thickness of a printing ink would be exceeded, it is tested from this color location at the maximum layer thickness of this printing ink whether a color location can be achieved by changing the layer thicknesses of the other printing inks. which is within the specified tolerances around the target color location. If a color location is reached in which the maximum layer thickness of a second printing ink would be exceeded, an attempt is made from this color location to use the change in the remaining printing ink to find a color location that is within the specified tolerances around the target color location.
  • this color locus is activated as the new target color locus. If it is not possible to reach a color location in the tolerance range around the target color location without exceeding the maximum layer thickness of at least one printing ink, the possibility is provided to intervene manually in the control process. Based on his specialist knowledge, the printer can decide whether the tolerance range should be expanded to include the target color location or whether the maximum layer thickness of the critical printing ink should be increased. With the corresponding decision, the previously described method starts again and searches again - under the boundary condition of maximum layer thicknesses - a color location that is as close as possible to the target color location.
  • the dot gain is direct and not only indirect, i.e. the maximum / minimum layer thickness is also taken into account.
  • the dot gain defined as the difference between the halftone values (percentage, optically effective surface coverage) of halftone film and halftone printing is of crucial importance for the color impression of a print / production print. Even small changes in the area coverage of the grid of only one color lead to intolerable color falsifications in high-quality printed products.
  • the object of the invention is therefore to specify a method for controlling the ink flow of a printing press which - on the one hand, guarantees optimum print quality while observing process-related limit values, and on the other hand allows largely automated control of the ink flow. Manual intervention by the printer only has to be carried out in extreme exceptional cases.
  • the object is achieved in that the dot gain at the actual location and at the target location is calculated from the measured value (s) of a halftone and a solid tone field of a printed sheet, that in the event that the dot gain at the target location is outside the dot gain tolerance, for the maximum and minimum tolerable dot gain the corresponding tolerance limits of the layer thickness are determined, that with these layer thicknesses a possible location at the limit of the tolerable dot gain is calculated as the new target location and that the target location is activated if it is also within the color tolerance or density tolerance.
  • the dot gain tolerance is increased by a factor N (N> 1) and the optional location at the limit of Color tolerance or density tolerance is controlled as the target location if it is also within the extended tone value tolerance.
  • N the dot gain tolerance
  • the optional location at the limit of Color tolerance or density tolerance is controlled as the target location if it is also within the extended tone value tolerance.
  • the tonal value increases at the actual location and at the target location are calculated from the gray field, full tone and raster measured values of a printed sheet, that in the event that the tonal value increases at the target location outside the tolerable tonal value increases, for which the maximum and minimum tolerable tonal value increases are determined the corresponding tolerance limits of the layer thicknesses of the individual printing inks, and that with these layer thicknesses a possible location at the limits of the tolerable tonal value increases is calculated and controlled as a new target location if it is additionally lies within the tolerance range.
  • the invention can also be advantageously developed in the multi-color control in such a way that in the event that the new target location lies outside the tolerance range, the dot gain tolerances are increased by a factor N (N> 1) and the ability -Location is determined at the limits of the extended, tolerable dot gain.
  • a further development of the method according to the invention provides that measured values from gray field, halftone and solid tone fields can be determined both by means of a spectrometer and by means of a densitometer.
  • the factor N for expanding the tone value increase tolerances is determined by means of an input.
  • This decision list is created for a single color scheme.
  • the printer also has the option of deciding for which color the change should be made.
  • a further development of the method according to the invention provides that suggestions for necessary changes are calculated and displayed to the printer. This gives the printer specific information about the color changes he has to reckon with if he chooses it. This gives the printer the opportunity to find the best possible color guidance based on the values displayed, combined with his or her experience, without taking the risk of printing waste through failed correction attempts.
  • a printing press 1 is provided in a manner known per se with ink guide elements 2, with the aid of which the ink supply and thus the layer thickness can be controlled by control signals.
  • control signals are supplied to the color guide elements 2 by a color control unit 3, which generates the control signals on the basis of color control data which are generated in an input / output device 4 in connection with a measured value processing unit 5.
  • An actual value feedback to the input / output unit 4 is provided by the ink guide elements 2.
  • a print control strip 7 with several color measuring fields. These are scanned by a measuring head 8, which is part of a densitometer or a spectrometer 9.
  • An electronic measuring head control unit 10 controls the position of the measuring head 8, whereby the actual position of the measuring head 8 can be forwarded to the measuring head control unit 10 and further to the measured value processing unit 5. Measured values are passed from the densitometer / spectrometer 9 to the measured value processing unit 5.
  • the printer is made 4 suggestions via the input / output device, which he can change or follow by corresponding input.
  • the single-color control is ideal for single-color printing or printing special colors.
  • the measured values of the spectrometer or of the densitometer 9, ie the actual values, are queried at 11.
  • the target values and the respective tolerances are taken from a memory.
  • the difference between the measured value and the target value of each printing ink is formed by subtraction at 12.
  • the relative change in layer thickness dS / S or change in density dDV / DV is then calculated at 14 for comparison of the actual value and the target value.
  • the dot gain Z i at the actual location is calculated and from this, for example, the dot gain Z at the target location target is determined at 16 via the "light-catching model" at 16, which has not yet been published beforehand in CH patent application 01 268 / 88-9. If the calculated dot gain Z lies at the target location target within the dot gain tolerance ZTol around the target dot gain Zset, which is checked at 17, the relative changes in layer thickness dS / S or density change dDV / DV are used to compare the actual value actual and target Value should be calculated at 18. These color control data are passed directly to the color control unit 3 via the color control data transmission 27.
  • the color location or density location Kann1 is calculated at the limit of the dot gain tolerance Z + ZTol. If this location can also within the color tolerance ETol or Density tolerance DVTol lies around the target location target, which is checked in program part 20, it becomes the new target location target1.
  • the change in layer thickness calculated at 21 for comparing the actual location actual and target location target 1 is forwarded to the color control data transmission 27.
  • the optional location Kann1 does not meet the additional condition that it lies within the color tolerance ETol or density tolerance DVTol, the optional location Kann2 at 22 is calculated at the color tolerance limit or density tolerance limit. If the dot gain lies within the extended limit of the dot gain tolerance N x ZTol, which is tested at 23, the layer thickness change dS / S or density change dDV / DV is calculated at 24 for comparison between the actual value actual and the target value target2 and sent to the Color control data transmission 27 passed.
  • the printer is given the options already mentioned for a further procedure.
  • program part 25 based on suggestions and on the basis of his experience based on a decision list, he can determine the further procedure via input / output device 2.
  • the color control variables are calculated after the user input at 26 and passed on to the color control unit 3 via the color control data transmission 27.
  • a program flow chart for the implementation of the method according to the invention is proposed for the case of a colorimetric color guide control in gray fields.
  • the gray field control is ideal when printing with the three standard colors CYAN, MAGENTA, YELLOW.
  • the densities are checked independently of one another to determine whether they are within the permissible tolerances (see single-color control).
  • the measured values of the spectrometer 9, ie the actual values are queried at 11.
  • the target values and the tolerances are taken from a memory.
  • the difference between the measured values and the corresponding target values is formed by subtraction at 13.
  • the relative change in layer thickness dS i / S i that is necessary for reaching the target values is then calculated at 28.
  • the index i stands for the standard colors involved in printing. Indexed sizes are determined independently of each other for all three printing inks.
  • the dot gain Z i is determined at the actual location.
  • the "light trapping model” which has become known in the as yet unpublished CH patent application 01 268 / 88-9, can then be used to determine the dot gain Z i at 30 at the target location target.
  • the dot gain Z i at the target location target lies within a predetermined dot gain tolerance ZTol i around the target dot gain. If this condition is fulfilled for each of the printing inks, the change in layer thickness dS i / S i already determined under 28 is forwarded via the program part 32 to the color control data transmission 27.
  • the corresponding maximum permissible layer thicknesses Smax i and Smin i are calculated under 33 for the maximum and minimum tolerable dot gain ZSoll i ⁇ ZTol i .
  • the "layer thickness limitation" at 34 determines an optional location Kannl, in which each printing ink lies within its maximum permissible layer thickness.
  • the optional location Kann1 becomes the new target location target1 and the layer thickness change dS i / S i calculated under 36 for comparison of the actual location actual and target Location Soll1 are fed to the color control data transmission 27.
  • the dot gain tolerance ZTol i is expanded by a factor of N (N> 1) at 37 and the corresponding maximum tolerable values become the corresponding threshold values of the dot gain tolerances ZSoll i ⁇ (N x ZTol i ) Limit values Smax ′ i and Smin ′ i determined for the layer thickness.
  • the optional location Kann2 is then determined in program part 38, at which none of the maximum permissible layer thicknesses Smax i is exceeded.
  • the optimal color locus Opt is determined at 39. This optimal color locus Opt lies at the intersection of the straight lines connecting Kann1 and Kann2 with the surface of the tolerance range TolR. Under 40 whether associated with the optimal location Opt dot gain Zopt i exp within the enlarged Tonwertzu shakingtoleranz (ZTol i) is checked, located around the target dot gain Zsoll. If this condition is met for all printing inks, Opt becomes the new target location Soll2 and the corresponding changes in layer thickness dS i / S i are determined under 41 and sent to the color control data transmission 27.
  • this method also takes into account that, for good color rendering, for procedural reasons certain threshold values of the dot gain and the layer thickness must not be exceeded / undershot. If a location cannot be found considering the simple boundary conditions, the limit values for the boundary conditions are expanded. The printer only has to intervene manually in the color guide control if no suitable color location or density location can be found here either.
  • Actual color location Eactual and target color location ESet are separated from one another by a certain color difference.
  • the target color locus ESoll is now not controlled unconditionally. If not all dot gain at the target location is within the tolerances, it is checked beforehand whether an optional color location EKann1 can be found within the given dot gain tolerances - and thus within the maximum layer thicknesses S maxi , Smin i of the individual printing inks calculated from this - which is also within of the specified color tolerance range ETolR lies around the target color location ESoll. 4 is the maximum tolerable dot gain for only a first one without restriction Ink drawn in. The boundary surface is spanned by the two remaining printing inks. In the general form, but not shown here, the tonal value increase tolerances ZTol i form a parallelepiped as a space around the actual color locus EIst.
  • FIG. 4 shows the case in which the optional color locus EKann1 does not lie within the color tolerance range ETolR spanned by the color tolerances ETol i .
  • This color tolerance space ETolR has the advantageous shape of an ellipsoid, the larger axis of which lies in the direction of the L axis. This takes into account the fact that the human eye is much less sensitive to changes in brightness than to changes in color. Since the optional color location EKann1 does not meet both boundary conditions (maximum layer thickness and maximum color tolerance) at the same time, the optional color location EKann1 does not become the new target color location ESoll1.
  • the dot gain tolerance is expanded by a factor of N (N> 1) and another possible color location EKann2 is determined within the expanded dot gain.
  • this optional color locus EKann2 fulfills the additional boundary condition and lies within the color tolerance ellipsoid around the target color locus ESet.
  • the intersection of the connecting straight line between the two optional color loci EKann1, EKann2 with the surface of the tolerance becomes the new target color locus EOpt -Ellipsoids determined.
  • the dot gain at EOpt is within the extended, tolerable dot gain. EOpt is therefore controlled as the new target location.

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Color Image Communication Systems (AREA)
  • Ink Jet (AREA)
  • Printing Methods (AREA)
  • Electronic Switches (AREA)
EP90105665A 1989-04-24 1990-03-26 Procédé pour contrôler l'encrage dans une machine d'impression avec limitation de l'épaisseur de la couche d'encre et de l'augmentation de la valeur tonale Expired - Lifetime EP0394681B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3913382A DE3913382C2 (de) 1989-04-24 1989-04-24 Verfahren zur Steuerung der Farbführung einer Druckmaschine
DE3913382 1989-04-24

Publications (3)

Publication Number Publication Date
EP0394681A2 true EP0394681A2 (fr) 1990-10-31
EP0394681A3 EP0394681A3 (fr) 1991-06-26
EP0394681B1 EP0394681B1 (fr) 1995-02-01

Family

ID=6379294

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90105665A Expired - Lifetime EP0394681B1 (fr) 1989-04-24 1990-03-26 Procédé pour contrôler l'encrage dans une machine d'impression avec limitation de l'épaisseur de la couche d'encre et de l'augmentation de la valeur tonale

Country Status (5)

Country Link
US (1) US5023812A (fr)
EP (1) EP0394681B1 (fr)
JP (1) JPH074925B2 (fr)
CA (1) CA2012050C (fr)
DE (2) DE3913382C2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0518559A1 (fr) * 1991-06-11 1992-12-16 Scitex Corporation Ltd. Procédé et dispositif de formation d'une bande de contrôle
EP0600335A1 (fr) * 1992-11-28 1994-06-08 Heidelberger Druckmaschinen Aktiengesellschaft Méthode pour zonalement commander/régler l'encrage dans une machine d'impression
EP1080892A2 (fr) * 1999-09-06 2001-03-07 Komori Corporation Procédé et dispositif de gestion de couleurs dans une machine à imprimer
EP1156667A2 (fr) * 2000-05-17 2001-11-21 Komori Corporation Procédé et dispositif de gestion de couleurs dans une machine à imprimer

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0408507B1 (fr) * 1989-07-14 1993-11-10 GRETAG Aktiengesellschaft Méthode de détermination des écarts de couleur entre deux surfaces tramées imprimées avec une machine d'impression ainsi que méthode de commande ou réglage de l'impression couleurs d'une machine à imprimer
DE4005558A1 (de) * 1990-02-22 1991-09-19 Roland Man Druckmasch Verfahren zur prozessdiagnose einer rotationsdruckmaschine anhand von remissionen von vollton- und rastertonfeldern
DE4335229C2 (de) * 1993-10-15 1998-07-16 Heidelberger Druckmasch Ag Verfahren zum Erzeugen von auf einer Offsetdruckmaschine hergestellten Farbmustern
DE4415486C2 (de) * 1994-05-03 1998-06-04 Heidelberger Druckmasch Ag Verfahren zur Bestimmung der zulässigen Toleranzen für die Steuerung oder Regelung der Farbgebung an einer Druckmaschine
US5978506A (en) * 1995-12-28 1999-11-02 Ricoh & Company, Ltd. Colorant-independent color balancing methods and systems
DE19749064A1 (de) * 1997-11-06 1999-05-12 Heidelberger Druckmasch Ag Verfahren zur Ermittlung von Farbwertgradienten
US6142078A (en) * 1998-11-10 2000-11-07 Quad/Tech, Inc. Adaptive color control system and method for regulating ink utilizing a gain parameter and sensitivity adapter
US20030204410A1 (en) * 2002-04-26 2003-10-30 Clariant International, Ltd. Method and apparatus for approving color samples
DE102005001417B4 (de) * 2004-01-29 2009-06-25 Heidelberger Druckmaschinen Ag Projektionsflächenabhängige Anzeige-/Bedienvorrichtung
DE102011012806B4 (de) 2010-03-24 2022-07-07 Heidelberger Druckmaschinen Ag Graubalancekorrektur eines Druckverfahrens
EP2439071A1 (fr) 2010-10-11 2012-04-11 KBA-NotaSys SA Motif de contrôle des couleurs pour la mesure optique de couleurs imprimées sur un substrat de type feuille ou toile à l'aide d'une presse d'impression multicolore et utilisations correspondantes
US9060078B2 (en) * 2012-05-30 2015-06-16 Ricoh Company, Ltd. Printer consistency measurement, evaluation and correction

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0089016A1 (fr) * 1982-03-16 1983-09-21 Windmöller & Hölscher Procédé pour le réglage automatique des couleurs imprimées par les machines d'impression flexographiques imprimant en quatre couleurs
DE3440706A1 (de) * 1984-11-07 1986-05-07 grapho metronic Meß- und Regeltechnik GmbH & Co, 8000 München Verfahren zur steuerung oder regelung der farbgebung von druckerzeugnissen
EP0324718A1 (fr) * 1988-01-14 1989-07-19 GRETAG Aktiengesellschaft Procédé et dispositif pour régler l'encre dans une machine à imprimer
EP0228347B1 (fr) * 1985-12-10 1989-10-25 Heidelberger Druckmaschinen Aktiengesellschaft Procédé de commande de l'alimentation en encre pour une machine à imprimer, dispositif d'impression équipé de manière correspondante et dispositif de mesure pour un tel appareil d'impression
EP0196431B1 (fr) * 1985-03-21 1992-11-11 Felix Brunner Procédé, dispositif de réglage et moyens auxiliaires pour l'obtention d'un résultat d'impression uniforme au moyen d'une machine d'impression offset polychrome fonctionnant suivant le procédé de similigravure

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2950606A1 (de) * 1979-12-15 1981-06-19 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Vorrichtung zur zonenweisen optoelektronischen messung der flaechendeckung einer druckvorlage
DE3003607C2 (de) * 1980-02-01 1984-01-05 Dr.-Ing. Rudolf Hell Gmbh, 2300 Kiel Schaltungsanordnung zur partiellen Nachkorrektur von Farberkennungsräumen bei der Farberkennung
DE3024773A1 (de) * 1980-06-30 1982-01-28 Grapho-Metronic Meß- und Regeltechnik GmbH & Co, KG, 8000 München Verfahren und einrichtung zur kontrolle und zum steuern der farbgebung einer mehrfarben-druckmaschine
JPS57208422A (en) * 1981-06-18 1982-12-21 Fuji Photo Film Co Ltd Hue judging device
DD253679A1 (de) * 1986-11-13 1988-01-27 Polygraph Leipzig Verfahren zum regeln der farbdichte
JPS63145926A (ja) * 1986-12-10 1988-06-18 Hoya Corp カラ−センサ
DE3812099C2 (de) * 1988-04-12 1995-01-26 Heidelberger Druckmasch Ag Verfahren zur Farbsteuerung einer Offsetdruckmaschine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0089016A1 (fr) * 1982-03-16 1983-09-21 Windmöller & Hölscher Procédé pour le réglage automatique des couleurs imprimées par les machines d'impression flexographiques imprimant en quatre couleurs
DE3440706A1 (de) * 1984-11-07 1986-05-07 grapho metronic Meß- und Regeltechnik GmbH & Co, 8000 München Verfahren zur steuerung oder regelung der farbgebung von druckerzeugnissen
EP0196431B1 (fr) * 1985-03-21 1992-11-11 Felix Brunner Procédé, dispositif de réglage et moyens auxiliaires pour l'obtention d'un résultat d'impression uniforme au moyen d'une machine d'impression offset polychrome fonctionnant suivant le procédé de similigravure
EP0228347B1 (fr) * 1985-12-10 1989-10-25 Heidelberger Druckmaschinen Aktiengesellschaft Procédé de commande de l'alimentation en encre pour une machine à imprimer, dispositif d'impression équipé de manière correspondante et dispositif de mesure pour un tel appareil d'impression
EP0324718A1 (fr) * 1988-01-14 1989-07-19 GRETAG Aktiengesellschaft Procédé et dispositif pour régler l'encre dans une machine à imprimer

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0518559A1 (fr) * 1991-06-11 1992-12-16 Scitex Corporation Ltd. Procédé et dispositif de formation d'une bande de contrôle
US5636330A (en) * 1991-06-11 1997-06-03 Scitex Corporation Ltd. Method and apparatus for creating a control strip
EP0600335A1 (fr) * 1992-11-28 1994-06-08 Heidelberger Druckmaschinen Aktiengesellschaft Méthode pour zonalement commander/régler l'encrage dans une machine d'impression
US5460090A (en) * 1992-11-28 1995-10-24 Heidelberger Druckmaschinen Ag Method and device for zonally controlling and regulating inking in a printing machine
EP1080892A2 (fr) * 1999-09-06 2001-03-07 Komori Corporation Procédé et dispositif de gestion de couleurs dans une machine à imprimer
EP1080892A3 (fr) * 1999-09-06 2001-09-05 Komori Corporation Procédé et dispositif de gestion de couleurs dans une machine à imprimer
US7031022B1 (en) 1999-09-06 2006-04-18 Komori Corporation Color management method and apparatus for printing press
EP1156667A2 (fr) * 2000-05-17 2001-11-21 Komori Corporation Procédé et dispositif de gestion de couleurs dans une machine à imprimer
EP1156667A3 (fr) * 2000-05-17 2004-05-06 Komori Corporation Procédé et dispositif de gestion de couleurs dans une machine à imprimer

Also Published As

Publication number Publication date
DE3913382C2 (de) 1995-12-14
JPH02297442A (ja) 1990-12-07
EP0394681B1 (fr) 1995-02-01
DE3913382A1 (de) 1990-10-25
DE59008391D1 (de) 1995-03-16
EP0394681A3 (fr) 1991-06-26
JPH074925B2 (ja) 1995-01-25
CA2012050C (fr) 1993-12-07
US5023812A (en) 1991-06-11
CA2012050A1 (fr) 1990-10-24

Similar Documents

Publication Publication Date Title
EP0196431B1 (fr) Procédé, dispositif de réglage et moyens auxiliaires pour l'obtention d'un résultat d'impression uniforme au moyen d'une machine d'impression offset polychrome fonctionnant suivant le procédé de similigravure
EP0337148B1 (fr) Procédé de commande de l'encrage d'une machine d'impression
EP0394681B1 (fr) Procédé pour contrôler l'encrage dans une machine d'impression avec limitation de l'épaisseur de la couche d'encre et de l'augmentation de la valeur tonale
DE19844495B4 (de) Verfahren zur Farbkalibrierung mittels Colormanagement für eine digital ansteuerbare Druckmaschine mit einer wiederbeschreibbaren Druckform
EP0255586B1 (fr) Procédé et dispositif pour influencer l'encrage d'une surface encrée dans une machine à imprimer
DE3903981C2 (de) Verfahren zur Regelung der Farbfüllung bei einer Druckmaschine
EP0324718A1 (fr) Procédé et dispositif pour régler l'encre dans une machine à imprimer
EP0585740B1 (fr) Méthode pour la commande du processus d'impression dans une presse d'imprimerie à cliché trame en particulier une machine à imprimer offset à feuilles
EP0451106B1 (fr) Dispositif d'analyse des bandes de contrôle d'impression
DE3830121A1 (de) Verfahren und vorrichtung zur einstellung eines vorgegebenen, durch ein wertepaar volltondichte/rasterpunktaenderung definierten druckstandards bei einem autotypischen druckvorgang
EP0825023B1 (fr) Procédé pour déterminer des données de reglage pour la commande d'une machine à imprimer
DE4343905C2 (de) Verfahren zur Steuerung der Farbführung bei einer Druckmaschine
DE19515499A1 (de) Verfahren zum Regeln der Farbgebung beim Drucken
EP0505323B2 (fr) Procédé pour le réglage des grandeurs des points de trame pour une presse rotative à imprimer offset
EP0676285B2 (fr) Gestion des couleurs dans une machine rotative offset pour feuilles
DE3543444A1 (de) Verfahren und regelvorrichtung zur erzielung eines gleichfoermigen druckresultats an einer autotypisch arbeitenden mehrfarbendruckmaschine
EP0600335B1 (fr) Méthode pour zonalement commander/régler l'encrage dans une machine d'impression
EP0916491B1 (fr) Procédé pour déterminer des gradients colorimétriques
EP0522301B1 (fr) Procédé de surveillance et de réglage du processus d'impression, en particulier dans les machines à imprimer en offset
DE3440706C2 (fr)
DE4038574C1 (fr)
DE19830487A1 (de) Verfahren zur Ermittlung von Flächendeckungen in einem Druckbild
DE102023103467A1 (de) Verfahren zum Einstellen einer Farbe in einer Druckmaschine

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19900326

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): CH DE FR GB IT LI SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): CH DE FR GB IT LI SE

RHK1 Main classification (correction)

Ipc: B41F 33/00

17Q First examination report despatched

Effective date: 19930304

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE FR GB IT LI SE

REF Corresponds to:

Ref document number: 59008391

Country of ref document: DE

Date of ref document: 19950316

ET Fr: translation filed
ITF It: translation for a ep patent filed

Owner name: STUDIO JAUMANN

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19950426

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19960304

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19970327

EUG Se: european patent has lapsed

Ref document number: 90105665.5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19990222

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19990317

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19990331

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000326

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000331

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000331

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20000326

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20001130

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20050324

Year of fee payment: 16

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20050326

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20061003