EP2049336B1 - Élément de mesure pour mesurer un registre de couleur et procédé de réglage du registre de couleurs et/ou de mesure du registre de couleurs - Google Patents

Élément de mesure pour mesurer un registre de couleur et procédé de réglage du registre de couleurs et/ou de mesure du registre de couleurs Download PDF

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Publication number
EP2049336B1
EP2049336B1 EP07786003A EP07786003A EP2049336B1 EP 2049336 B1 EP2049336 B1 EP 2049336B1 EP 07786003 A EP07786003 A EP 07786003A EP 07786003 A EP07786003 A EP 07786003A EP 2049336 B1 EP2049336 B1 EP 2049336B1
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EP
European Patent Office
Prior art keywords
measuring element
frequency
part measuring
pattern
optical density
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.)
Not-in-force
Application number
EP07786003A
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German (de)
English (en)
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EP2049336A1 (fr
Inventor
Helmut Schild
Andreas Lippold
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
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Manroland AG
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Publication date
Application filed by Manroland AG filed Critical Manroland AG
Publication of EP2049336A1 publication Critical patent/EP2049336A1/fr
Application granted granted Critical
Publication of EP2049336B1 publication Critical patent/EP2049336B1/fr
Not-in-force legal-status Critical Current
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0081—Devices for scanning register marks
    • 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
    • B41P2233/52—Marks on printed material for registering

Definitions

  • the invention relates to a measuring element for measuring a color register. Furthermore, the invention relates to a method for color register control and color register measurement.
  • a substrate such as e.g. a printing sheet, successively moved by a plurality of successively arranged printing units, preferably in each of the printing units, a partial printing image is applied in a special ink on the substrate.
  • the substrate is preferably moved through four successive arranged printing units, wherein in each of the printing units, a partial printing image in the printing inks cyan, magenta, yellow and black is applied to the substrate.
  • a color register controller includes a circumferential register adjusting means for compensating for circumferential displacement of the partial printing images, a side register adjusting means for compensating for displacement of the partial printing images in the axial direction of the printing cylinders, and a skew register adjusting means for compensating rotational misalignments of the partial printing images.
  • the positional accuracy of the partial printing images on the substrate or the color register of the partial printing images must be detected by measurement, with this purpose serve measuring elements that are printed on the substrate.
  • From the DE 39 15 587 C1 are measuring elements for measuring a color register or a passport and a method for determining the positional accuracy of partial printing images on a substrate known, wherein according to the DE 39 15 587 C1 the positional accuracy of partial print images is detected by printing two identical measuring elements on a printing substrate and evaluating the correlation between them, the positional accuracy of the partial printed images being greater the higher the correlation between the two identical measuring elements.
  • a mark for detecting the register error or registration error in multi-color printing known.
  • the marking has a plurality of parallel spaced straight bars of equal width, which are printed with at least two partial colors one above the other.
  • the evaluation of the area coverage is based on a reference standard in which the marking is printed in one color and in which the bars occupy a certain area proportion of the bar field.
  • the perfect overprinting of the partial colors does not change the area proportion.
  • the area ratio of the bars increases, which is recorded with a measuring device and stored as a measure of error. For this purpose, the offset of the bars is measured and assigned to the resulting surface enlargement.
  • the present invention is based on the problem of creating a novel measuring element for measuring a color register and a novel method for color register control or color register measurement.
  • the measuring element according to the invention for measuring a color register is composed of at least two partial measuring elements which are printed one above the other on the printing material.
  • the partial measuring elements each have an at least one-dimensional pattern of repeating regions of different optical density or area coverage, wherein the partial measuring elements have different frequencies with which these regions repeat themselves. These frequencies can be constant or variable seen over the size of the sub-measuring elements.
  • the overprinting of such partial measuring elements results in an interference, which serves as a measured variable for the positional accuracy of the partial pressure images, which are applied to the printing material with the aid of the printing units involved in the compression of the measuring element.
  • the main advantage of the measuring element according to the invention is that even then the accuracy of the color register or register can be determined with a high resolution if the camera used to detect the measuring element has only a low resolution.
  • the measuring element according to the invention makes use of a vernier effect in order to increase the resolution of the camera used for scanning the measuring element.
  • the present invention relates to a measuring element for determining the positional accuracy of printed on a substrate on one another printed Opera Kunststoffe, so for determining the accuracy of the color register or passport, wherein a determined hereby actual value for color register control can be used in that the actual value is compared with a target value and dependent on this comparison, manipulated variables for register adjustment devices are generated.
  • Fig. 1 to 3 visualize a first embodiment of the present invention, wherein Fig. 1 shows a measuring element 20, which is formed of two partial printed part measuring elements. Each of the two sub-measuring elements is generated via an individual printing unit, wherein in the embodiment of the Fig. 1 to 3 each of the two sub-measuring elements has a one-dimensional pattern of repeating regions with different optical density or different area coverage. The frequency of the two partial measuring elements, with which the areas of different optical density or different area coverage repeat, is different, so that the overprint of these two partial printed images results in an interference which serves as a measured variable for the color register or the register.
  • Fig. 3 shows a partial measuring element 21 with a one-dimensional pattern of repetitive areas of different optical density or different area coverage, these areas is a bar sequence having a certain frequency.
  • FIG. 2 shows Fig. 2 a measuring element 22, which analogous to the measuring element 20 of the Fig. 1 is constructed, but in which the increase of the optical density or area coverage generated by the interference is not in the center of the measuring element 22, but rather is shifted to the left.
  • This serves as a measured variable for the fact that the partial printed images of the printing units which are involved in the printing of the measuring element 20 have a misalignment in the direction in which the one-dimensional pattern of the partial measuring elements of the measuring element 22 periodically repeats.
  • the measuring elements 20 and 22 include the Fig. 1 and 2 two partially printed sub-measuring elements, wherein a first part measuring element has a first one-dimensional pattern of frequency repeating regions of different optical density or different area coverage, wherein a second sub-measuring element a second one-dimensional pattern of frequency repeating areas with different optical density or having different area coverage, and wherein the frequencies of the two one-dimensional patterns are different.
  • the one-dimensional patterns are according to Fig. 1 around bars.
  • the frequency f 2 of the second one-dimensional pattern of the second Operamesselements is determined depending on the size of the measuring element, in such a way that the size of the measuring element of the wavelength ⁇ 1 of the interference of the two patterns corresponds, the frequency f 1 of the interference of the difference Frequencies f 1 and f 2 of the two one-dimensional pattern corresponds.
  • the positional accuracy of two partial printing images can be determined in one direction, in the direction in which the pattern of the one-dimensional partial measuring elements repeats periodically. Accordingly, with such a measuring element, depending on the direction in which the same is printed on a printing material, the positional accuracy of two partial printing images and thus two printing units can be detected either in the circumferential direction or in the axial direction of the printing cylinder.
  • Fig. 1 to 3 is the frequency f 1 of the first one-dimensional pattern of the first Partmesselements and the frequency f 2 of the second one-dimensional pattern of the second Partmesselements over the size or extent of the partial measuring elements seen constant.
  • these frequencies can also be variable over the size or extension of the partial measuring elements.
  • these frequencies can be dimensioned differently in the middle of the partial measuring element than at the edges of the partial measuring elements.
  • the achievable resolution can be adapted to the size of the deviation to be measured, preferably such that the smaller the deviation to be measured, the greater the resolution.
  • Fig. 4 shows a second embodiment of a measuring element 23 according to the invention, which consists of the in FIGS. 5 and 6 shown partial measuring elements 24 and 25 composed.
  • the two partial measuring elements 24 and 25 according to FIGS. 5 and 6 in turn have a one-dimensional pattern of repeating with an individual frequency ranges of different optical density or different area coverage, which are designed as a bar series, for better visual recognition of the accuracy of the color register or passers some of the bars are extended, namely in the partial measuring element 24th of the Fig. 5 the two middle bars and the partial measuring element 25 of the Fig. 6 the middle bar.
  • Fig. 7, 8 show measuring elements according to the invention 26 and 27, each consisting of two sub-printed part measuring elements, each of the partial measuring elements has a two-dimensional pattern of repeating in two linearly independent directions areas of different optical density and different area coverage.
  • Fig. 9 shows such a partial measuring element 28 which is formed like a checkerboard and in a first direction, a pattern of repetitive areas with different optical density or different optical surface coverage and in a second, perpendicular direction also a pattern of areas with different optical density or different Has area coverage.
  • Fig. 9 are the frequencies in which the areas of different optical density or different area coverage repeat in the two directions of the Operamesselements 28, the same size. However, these frequencies can also be different in size.
  • the size of Operamesselements 28 in both directions the same size. Again, however, the size of the Detailmesselements 28 may differ from each other in both directions.
  • the increase in the optical density caused by the interference is offset relative to the center of the measuring element 27.
  • An interference generated by the overprinting of two partial measuring elements can also bring about a reduction of the optical density or area coverage.
  • the position of the interference in the measuring element in turn serves as a measured variable for the positional accuracy of the partial pressure images and thus as a measured variable for the color register or the register, wherein with a measuring element according to Fig. 7 or 8, the positional accuracy in two directions, namely in the circumferential direction and in the axial direction of the impression cylinder, can be determined simultaneously.
  • the partial measuring element 28 of the Fig. 9 the frequency with which repeat the areas of different optical density or area coverage in the linearly independent directions, the same size. However, these frequencies can also be different in size.
  • FIGS. 10 and 11 show further embodiments of measuring elements according to the invention, which consist of two partial printed sub-elements with a two-dimensional pattern of repeating regions of different optical density or area coverage, wherein Fig. 12 such a partial measuring element 31 shows.
  • the partial measuring element 31 of the Fig. 12 has as well as the partial measuring element 28 of the Fig. 9 Repeating areas of different optical density or different area coverage in two linearly independent directions, so that therefore to avoid unnecessary repetition of the comments to Fig. 7 to 9 can be referenced. If two partial measuring elements according to Fig. 12 that are different in terms of the frequencies of the repeating regions of different optical density or different area coverages, printed on one another, again resulting in interference, which lead to an increase in the optical density in the region of interference, wherein Fig. 10 the interference in the middle of the measuring element 29 and in Fig. 11 the interference is offset from the center of the measuring element 30.
  • a density distribution for the measuring elements For the purposes of the invention, it is possible to detect a density distribution for the measuring elements. Such a density distribution consists of discrete values. An interpolation can be used to determine an at least one-dimensional function of the density distribution, from which the position of the interference can be calculated.

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  • Spectrometry And Color Measurement (AREA)

Claims (13)

  1. Elément de mesure pour la mesure d'un registre de couleur, comportant au moins deux sous-éléments de mesure imprimés les uns sur les autres (21, 25, 28, 31), chaque sous-élément de mesure (21, 25, 28, 31) étant créé au moyen d'une unité d'impression individuelle dans laquelle chaque fois une sous-image d'impression de couleur d'impression spéciale est appliquée, chaque sous-élément de mesure (21, 25, 28, 31) présentant un motif au moins unidimensionnel fait de zones répétitives de densité optique différente ou de recouvrement surfacique différent, caractérisé en ce que
    les sous-éléments de mesure (21, 25, 28, 31) sont conçus de manière à générer, lors de l'impression les uns sur les autres de ces sous-éléments de mesure (21, 25, 28, 31), une interface optique mesurable entre les sous-éléments de mesure (21, 25, 28, 31) et à ce que l'interférence puisse être enregistrée sous forme d'un paramètre de mesure pour le registre de couleur,
    un premier sous-élément de mesure (21, 25, 28, 31) présentant un premier motif unidimensionnel fait de zones répétitives selon une fréquence et de densité optique différente ou de recouvrement surfacique différent, un deuxième sous-élément de mesure (21, 25, 28, 31) présentant un deuxième motif unidimensionnel fait de zones répétitives selon une fréquence et de densité optique différente ou de recouvrement surfacique différent et les fréquences des deux motifs unidimensionnels étant différentes.
  2. Elément de mesure pour la mesure d'un registre de couleur, comportant au moins deux sous-éléments de mesure imprimés les uns sur les autres (21, 25, 28, 31), chaque sous-élément de mesure (21, 25, 28, 31) étant créé au moyen d'une unité d'impression individuelle dans laquelle chaque fois une sous-image d'impression de couleur d'impression spéciale est appliquée, chaque sous-élément de mesure (21, 25, 28, 31) présentant un motif au moins unidimensionnel fait de zones répétitives de densité optique différente ou de recouvrement surfacique différent, caractérisé en ce que
    les sous-éléments de mesure (21, 25, 28, 31) sont conçus de manière à générer, lors de l'impression les uns sur les autres de ces sous-éléments de mesure (21, 25, 28, 31), une interface optique mesurable entre les sous-éléments de mesure (21, 25, 28, 31) et à ce que l'interférence puisse être enregistrée sous forme d'un paramètre de mesure pour le registre de couleur,
    un premier sous-élément de mesure (21, 25, 28, 31) présentant un premier motif bidimensionnel fait de zones répétitives dans deux sens linéairement indépendants et de densité optique différente ou de recouvrement surfacique différent, un deuxième sous-élément de mesure (21, 25, 28, 31) présentant un deuxième motif bidimensionnel fait de zones répétitives dans deux sens linéairement indépendants et de densité optique différente ou de recouvrement surfacique différent.
  3. Elément de mesure selon la revendication 2, caractérisé en ce
    qu'une fréquence des zones répétitives de densité optique différente ou de recouvrement surfacique différent dans le premier sens du premier motif bidimensionnel est égale à une fréquence des zones répétitives de densité optique différente ou de recouvrement surfacique différent dans le deuxième sens linéairement indépendant du premier motif bidimensionnel, qu'une fréquence des zones répétitives de densité optique différente ou de recouvrement surfacique différent dans le premier sens du deuxième motif bidimensionnel est égale à une fréquence des zones répétitives de densité optique différente ou de recouvrement surfacique différent dans le deuxième sens linéairement indépendant du deuxième motif bidimensionnel et que la fréquence du premier motif bidimensionnel est différente de la fréquence du deuxième motif bidimensionnel.
  4. Elément de mesure selon la revendication 2, caractérisé en ce
    qu'une fréquence des zones répétitives de densité optique différente ou de recouvrement surfacique différent dans le premier sens du premier motif bidimensionnel est différente d'une fréquence des zones répétitives de densité optique différente ou de recouvrement surfacique différent dans le deuxième sens linéairement indépendant du premier motif bidimensionnel, qu'une fréquence des zones répétitives de densité optique différente ou de recouvrement surfacique différent dans le premier sens du deuxième motif bidimensionnel est différente d'une fréquence des zones répétitives de densité optique différente ou de recouvrement surfacique différent dans le deuxième sens linéairement indépendant du deuxième motif bidimensionnel et que les fréquences du premier motif bidimensionnel sont différentes des fréquences correspondantes du deuxième motif bidimensionnel.
  5. Elément de mesure selon la revendication 1, caractérisé en ce que
    la fréquence du premier motif unidimensionnel du premier sous-élément de mesure (21, 25, 28, 31) est établie de manière à ce que la longueur d'onde du premier motif corresponde à l'écart maximal mesurable du registre de couleur.
  6. Elément de mesure selon la revendication 5, caractérisé en ce que
    la fréquence du deuxième motif unidimensionnel du deuxième sous-élément de mesure (21, 25, 28, 31) est établie en fonction de l'amplitude de l'élément de mesure de manière à ce que l'amplitude de l'élément de mesure corresponde à la longueur d'onde de l'interférence des deux motifs, la fréquence de l'interférence coïncidant avec la différence des fréquences des deux motifs.
  7. Elément de mesure selon la revendication 5 ou 6, caractérisé en ce que
    les fréquences du premier motif unidimensionnel du premier sous-élément de mesure (21, 25, 28, 31) et du deuxième motif unidimensionnel du deuxième sous-élément de mesure (21, 25, 28, 31) sont constantes, vues sur l'amplitude des sous-éléments de mesure.
  8. Elément de mesure selon la revendication 5 ou 6, caractérisé en ce que
    les fréquences du premier motif unidimensionnel du premier sous-élément de mesure (21, 25, 28, 31) et du deuxième motif unidimensionnel du deuxième sous-élément de mesure (21, 25, 28, 31) sont variables, vues sur l'amplitude des sous-éléments de mesure.
  9. Elément de mesure selon la revendication 3 ou 4, caractérisé en ce que
    la fréquence du premier motif bidimensionnel du premier sous-élément de mesure (21, 25, 28, 31) est établie dans les deux sens linéairement indépendants de manière à ce que la longueur d'onde du premier motif corresponde à l'écart maximal mesurable du registre de couleur dans le sens respectif.
  10. Elément de mesure selon la revendication 9, caractérisé en ce que
    la fréquence du deuxième motif bidimensionnel du deuxième sous-élément de mesure (21, 25, 28, 31) est établie dans les deux sens linéairement indépendants en fonction de l'amplitude de l'élément de mesure dans le sens respectif de manière à ce que l'amplitude de l'élément de mesure corresponde à la longueur d'onde de l'interférence des deux motifs, la fréquence de l'interférence correspondant à la différence des fréquences des deux motifs.
  11. Elément de mesure selon la revendication 9 ou 10, caractérisé en ce que
    la fréquence du premier motif bidimensionnel du premier sous-élément de mesure (21, 25, 28, 31) dans les deux sens linéairement indépendants et la fréquence du deuxième motif bidimensionnel du deuxième sous-élément de mesure (21, 25, 28, 31) dans les deux sens linéairement indépendants sont constantes, vues sur l'amplitude des sous-éléments de mesure.
  12. Elément de mesure selon la revendication 9 ou 10, caractérisé en ce que
    la fréquence du premier motif bidimensionnel du premier sous-élément de mesure (21, 25, 28, 31) dans au moins un des deux sens linéairement indépendants et la fréquence du deuxième motif bidimensionnel du deuxième sous-élément de mesure (21, 25, 28, 31) dans au moins un des deux sens linéairement indépendants sont variables, vues sur l'amplitude des sous-éléments de mesure.
  13. Procédé de réglage du registre de couleur ou de mesure de registre de couleur à l'aide d'au moins deux sous-éléments de mesure imprimés les uns sur les autres (21, 25, 28, 31), chaque sous-élément de mesure (21, 25, 28, 31) étant créé à l'aide d'une unité d'impression individuelle dans laquelle chaque fois une sous-image d'impression de couleur d'impression spéciale est appliquée, chaque sous-élément de mesure (21, 25, 28, 31) présentant un motif au moins unidimensionnel fait de zones répétitives de densité optique différente ou de recouvrement surfacique différent, au moins deux sous-éléments de mesure (21, 25, 28, 31) imprimés les uns sur les autres sur un support d'impression étant mesurés, la valeur réelle du registre de couleur étant alors mesurée et comparée pour le réglage du registre de couleur à une valeur théorique et le réglage du registre de couleur étant réalisé en fonction de cette comparaison,
    caractérisé en ce
    qu'une répartition de densité divergeant d'une répartition régulière est enregistrée pour l'élément ou chacun des éléments de mesure formés de sous-éléments de mesure (21, 25, 28, 31) imprimés les uns sur les autres et consistant en valeurs discrètes, une fonction au moins unidimensionnelle de la répartition de densité étant définie par interpolation, fonction à partir de laquelle la situation de l'interférence est calculée.
EP07786003A 2006-08-04 2007-07-12 Élément de mesure pour mesurer un registre de couleur et procédé de réglage du registre de couleurs et/ou de mesure du registre de couleurs Not-in-force EP2049336B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006036587A DE102006036587A1 (de) 2006-08-04 2006-08-04 Messelement zur Messung eines Farbregisters sowie Verfahren zur Farbregisterregelung bzw. Farbregistermessung
PCT/EP2007/006171 WO2008014874A1 (fr) 2006-08-04 2007-07-12 Élément de mesure pour mesurer un registre de couleur et procédé de réglage du registre de couleurs et/ou de mesure du registre de couleurs

Publications (2)

Publication Number Publication Date
EP2049336A1 EP2049336A1 (fr) 2009-04-22
EP2049336B1 true EP2049336B1 (fr) 2011-12-07

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EP07786003A Not-in-force EP2049336B1 (fr) 2006-08-04 2007-07-12 Élément de mesure pour mesurer un registre de couleur et procédé de réglage du registre de couleurs et/ou de mesure du registre de couleurs

Country Status (4)

Country Link
EP (1) EP2049336B1 (fr)
AT (1) ATE536261T1 (fr)
DE (1) DE102006036587A1 (fr)
WO (1) WO2008014874A1 (fr)

Cited By (1)

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Publication number Priority date Publication date Assignee Title
EP3103648A2 (fr) 2015-06-12 2016-12-14 manroland web systems GmbH Impression de substrats transparents avec repérage

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DE102008025419A1 (de) * 2008-05-27 2009-12-03 Manroland Ag Verfahren zur Farbregistermessung an einer Druckmaschine
DE102009050047A1 (de) 2008-11-13 2010-05-20 Heidelberger Druckmaschinen Ag Kompakte Registermarke
DE102011009791B4 (de) 2011-01-29 2016-02-04 Sächsisches Institut für die Druckindustrie GmbH - Institut des Vereins Polygraph Leipzig e.V. Messelement zur Vermessung von beliebig übereinanderliegenden Markierungen
DE102012104584A1 (de) * 2012-05-29 2013-12-05 Océ Printing Systems GmbH & Co. KG Verfahren zum Steuern eines Farbdruckers oder Farbkopierers

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JPS585259A (ja) * 1981-07-03 1983-01-12 Toppan Printing Co Ltd 印刷における見当判別方法
DE3915587C1 (en) * 1989-05-16 1990-11-08 Man Roland Druckmaschinen Ag, 6050 Offenbach, De Measurement element for multiple colour offset printing - determines match difference between two partial images independently of quality of image signal
CA2078930C (fr) * 1991-09-24 1999-08-03 Raphael L. Levien Marque de repere
US5857784A (en) * 1997-01-28 1999-01-12 Bayer Corp. Agfa Division Image position error detection technique
US6150231A (en) * 1998-06-15 2000-11-21 Siemens Aktiengesellschaft Overlay measurement technique using moire patterns
US6553906B1 (en) * 2000-10-17 2003-04-29 Nexpress Solutions Llc Method and apparatus for sensing a register discrepancy in a multi-color printed item, and register control system and register marks
DE10204681A1 (de) 2002-02-06 2003-08-07 Gerd Laubmann Markierung zur Erfassung des Registerfehlers oder Passerfehlers im Mehrfarbendruck
US6644773B2 (en) * 2002-03-15 2003-11-11 International Business Machines Corporation Method, system, and article of manufacture for performing registration calibration for printing devices

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3103648A2 (fr) 2015-06-12 2016-12-14 manroland web systems GmbH Impression de substrats transparents avec repérage
DE102015109412A1 (de) 2015-06-12 2016-12-15 Manroland Web Systems Gmbh Registerhaltiges Bedrucken transparenter Substrate

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Publication number Publication date
DE102006036587A1 (de) 2008-02-07
EP2049336A1 (fr) 2009-04-22
WO2008014874A1 (fr) 2008-02-07
ATE536261T1 (de) 2011-12-15

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