EP1393925A1 - Smooth cut printing plate - Google Patents

Smooth cut printing plate Download PDF

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Publication number
EP1393925A1
EP1393925A1 EP20020405752 EP02405752A EP1393925A1 EP 1393925 A1 EP1393925 A1 EP 1393925A1 EP 20020405752 EP20020405752 EP 20020405752 EP 02405752 A EP02405752 A EP 02405752A EP 1393925 A1 EP1393925 A1 EP 1393925A1
Authority
EP
European Patent Office
Prior art keywords
printing plate
plate
engravings
printing
ink
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP20020405752
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German (de)
French (fr)
Inventor
Pierre-Yves Anderegg
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.)
KBA Notasys SA
Original Assignee
KBA Giori SA
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 KBA Giori SA filed Critical KBA Giori SA
Priority to EP20020405752 priority Critical patent/EP1393925A1/en
Priority to AU2003253212A priority patent/AU2003253212A1/en
Priority to PCT/IB2003/003748 priority patent/WO2004020212A1/en
Priority to AT03791129T priority patent/ATE321672T1/en
Priority to DE60304362T priority patent/DE60304362T2/en
Priority to EP03791129A priority patent/EP1551641B1/en
Publication of EP1393925A1 publication Critical patent/EP1393925A1/en
Withdrawn legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N1/00—Printing plates or foils; Materials therefor
    • B41N1/04—Printing plates or foils; Materials therefor metallic
    • B41N1/06—Printing plates or foils; Materials therefor metallic for relief printing or intaglio printing

Definitions

  • the present invention relates to an intaglio printing plate, used by example for printing securities such as banknotes, checks and other similar documents.
  • intaglio printing is well known in the state of the art, especially for printing securities.
  • a plate print is etched to form a predetermined pattern and the etchings are then filled with ink which will be transferred to the printed medium, for example paper, which is deformed by pressure by means of a cylinder, having an elastic surface, in the plate engravings.
  • the surface of the paper entering the engravings is thus marked with ink which was previously deposited in said engravings.
  • intaglio printing plate As an example of an intaglio printing plate, reference is made to US Patent 4,036,130, the content of which is incorporated by reference into the this request. Such a plate, usually made of metal, is engraved to form a determined design and can receive an additional hardened layer.
  • application DE 196 24 131 describes another automated plate manufacturing process intaglio printing using a laser.
  • Patent application DE 198 45 440 shows another production of plates intaglio printing unit for flatbed printing, the described plates comprising engravings the bottom of which has partitions forming channels or chambers allowing the ink to be transferred in a vertical direction only, i.e. perpendicular to the surface of the plate, and not in a horizontal or diagonal direction.
  • These channels also allow modulation of the thickness of the ink deposited on the printed medium.
  • patent application DE 198 45 436 describes an intaglio printing process, in which the intensity of the same printed color varies. This effect is obtained by engraving the plate, the depth of which varies so that the quantity of ink in the engraving also varies so that the quantity of ink transferred to the printed substrate is different, thus creating varying intensities.
  • the production rate of these intaglio printing machines can go up up to 10,000 sheets per hour which typically corresponds to a linear speed 2.8 meters / second.
  • the ink deposited in the sizes of the plate therefore undergoes several forces, one perpendicular to the direction of movement of the plate, and the other centrifugal due to the rotation of the plate around the axis of the plate cylinder.
  • the ink will move backwards from the waist into the plate by relative to the direction of rotation and will also be drawn outside the waist instead of stay at the bottom of it, which results in a lower quality print and a irregular paper inking.
  • the object of the invention is to remedy these drawbacks by improving the plates of known impressions.
  • one of the aims of the invention is to propose a plate intaglio printing allowing quality inking despite the fact that inking is done in a moving system.
  • Figure 1 shows a schematic sectional view of an intaglio printing plate according to the state of the art.
  • Figure 2 shows a schematic sectional view of an intaglio printing plate according to a first embodiment of the invention.
  • Figure 3 shows a schematic sectional view of an intaglio printing plate according to a second embodiment.
  • Figure 4 shows a schematic sectional view of an intaglio printing plate according to a third embodiment of the invention.
  • the plate 1 mainly comprises a external surface 2 in which an engraving 3 has been created.
  • ink 4 is deposited for use in marking the substrate, for example paper, printed.
  • the rotation of the plate is schematically represented by the arrow referenced R and the forces which act on the ink, during the production of substrate intaglio printed, by the arrows referenced f1 and f2 whose resultant f12 is actually directed as shown in the figure.
  • the first embodiment of the ink retaining means 4 are represented. These means have the form of slots 6 and are mainly arranged on the rear part of the engraving 3 with respect to the direction of rotation shown diagrammatically by the arrow A. These slots thus make it possible to retain the ink in the engraving and to oppose effectively to the effects of the resulting f12 as shown in Figure 1.
  • FIG. 3 Another embodiment of the retaining means is shown in Figure 3.
  • the means take the form of a toothing 7 cut in the rear part of the engraving 3 relative to the direction of rotation R of the plate 1.
  • the retaining means have the shape of a hollow 8 distributed in engraving 3, on its rear part relative to the direction of rotation R of the plate 1.
  • Such a printing plate can then be mounted without other in one of the machines known from US Patents 5,062,359 and US 5,899,145 incorporated in the this request.

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  • Printing Plates And Materials Therefor (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Printing Methods (AREA)
  • Organic Insulating Materials (AREA)
  • Manufacturing Of Printed Wiring (AREA)

Abstract

The low height printing impression plate has engravings (3) forming an image in the surface of the plate. The engravings receive ink for printing of the image on an substrate. The engravings have textured surfaces (6) to retain the ink. The textured surfaces can be formed on the walls of the engravings.

Description

La présente invention concerne une plaque d'impression taille-douce, utilisée par exemple pour l'impression de papiers-valeurs comme des billets de banque, chèques et autres documents similaires.The present invention relates to an intaglio printing plate, used by example for printing securities such as banknotes, checks and other similar documents.

La technique de l'impression taille-douce est bien connue dans l'état de la technique, notamment pour l'impression de papiers-valeurs. Selon cette technique, une plaque d'impression est gravée pour former un dessin prédéterminé et les gravures sont ensuite remplies d'encre qui sera reportée sur le support imprimé, par exemple du papier, qui est déformé par pression au moyen d'un cylindre, ayant une surface élastique, dans les gravures de la plaque. La surface du papier qui pénètre dans les gravures est ainsi marquée avec l'encre qui a été déposée auparavant dans lesdites gravures.The technique of intaglio printing is well known in the state of the art, especially for printing securities. According to this technique, a plate print is etched to form a predetermined pattern and the etchings are then filled with ink which will be transferred to the printed medium, for example paper, which is deformed by pressure by means of a cylinder, having an elastic surface, in the plate engravings. The surface of the paper entering the engravings is thus marked with ink which was previously deposited in said engravings.

Les brevets US 5,062,359 et US 5,899,145 décrivent des machines d'impression utilisant le procédé d'impression taille-douce. Leur contenu est incorporé par référence à la présente demande pour ce qui concerne le principe du procédé d'impression et les moyens nécessaires à sa réalisation.US Patents 5,062,359 and US 5,899,145 describe printing machines using the intaglio printing process. Their content is incorporated by reference to the present application with regard to the principle of the printing process and the means necessary for its realization.

A titre d'exemple de réalisation d'une plaque d'impression taille-douce, référence est faite au brevet US 4,036,130 dont le contenu est incorporé par référence dans la présente demande. Une telle plaque, habituellement en métal, est gravée pour former un dessin déterminé et peut recevoir une couche supplémentaire durcie. En outre, la demande DE 196 24 131 décrit un autre procédé automatisé de fabrication de plaque d'impression taille-douce au moyen d'un laser.As an example of an intaglio printing plate, reference is made to US Patent 4,036,130, the content of which is incorporated by reference into the this request. Such a plate, usually made of metal, is engraved to form a determined design and can receive an additional hardened layer. In addition, the application DE 196 24 131 describes another automated plate manufacturing process intaglio printing using a laser.

La demande de brevet DE 198 45 440 montre une autre réalisation de plaques d'impression taille-douce pour une impression à plat, les plaques décrites comprenant des gravures dont le fond présente des séparations formant des canaux ou chambres permettant le transfert de l'encre dans un sens vertical seulement, c'est-à-dire perpendiculaire à la surface de la plaque, et non dans un sens horizontal ou diagonal. Patent application DE 198 45 440 shows another production of plates intaglio printing unit for flatbed printing, the described plates comprising engravings the bottom of which has partitions forming channels or chambers allowing the ink to be transferred in a vertical direction only, i.e. perpendicular to the surface of the plate, and not in a horizontal or diagonal direction.

Ces canaux permettent également la modulation de l'épaisseur de l'encre déposée sur le support imprimé.These channels also allow modulation of the thickness of the ink deposited on the printed medium.

Finalement, la demande de brevet DE 198 45 436 décrit un procédé d'impression taille-douce, dans lequel l'intensité d'une même couleur imprimée varie. Cet effet est obtenu par une gravure de la plaque dont la profondeur varie de telle façon que la quantité d'encre dans la gravure varie elle-aussi de telle sorte que la quantité d'encre reportée sur le substrat imprimé est différente, créant ainsi des intensités variables.Finally, patent application DE 198 45 436 describes an intaglio printing process, in which the intensity of the same printed color varies. This effect is obtained by engraving the plate, the depth of which varies so that the quantity of ink in the engraving also varies so that the quantity of ink transferred to the printed substrate is different, thus creating varying intensities.

L'un des problèmes rencontrés avec les plaques d'impression utilisées dans la technique d'impression taille-douce dans les machines d'impression rotatives est lié à la vitesse de rotation desdites plaques qui sont montées sur des cylindres porte-plaques, telle que décrit dans le brevet US 4,598,642 dont le contenu est incorporé par référence dans la présente demande.One of the problems encountered with printing plates used in the art of intaglio printing in rotary printing machines is related to the speed of rotation of said plates which are mounted on plate cylinders, such as described in US Patent 4,598,642, the content of which is incorporated by reference into the this request.

La cadence de production de ces machines d'impression taille-douce peut s'élever jusqu'à 10'000 feuilles par heure ce qui, typiquement, correspond à une vitesse linéaire de 2,8 mètres/seconde. L'encre déposée dans les tailles de la plaque subit donc plusieurs forces, l'une perpendiculaire au sens de déplacement de la plaque, et l'autre centrifuge en raison de la rotation de la plaque autour de l'axe du cylindre porte-plaque.The production rate of these intaglio printing machines can go up up to 10,000 sheets per hour which typically corresponds to a linear speed 2.8 meters / second. The ink deposited in the sizes of the plate therefore undergoes several forces, one perpendicular to the direction of movement of the plate, and the other centrifugal due to the rotation of the plate around the axis of the plate cylinder.

En conséquence, l'encre va se déplacer vers l'arrière de la taille dans la plaque par rapport au sens de rotation et va en plus être attirée vers l'extérieur de la taille au lieu de rester au fond de celle-ci, ce qui a pour effet une impression de moindre qualité et un encrage irrégulier du papier.As a result, the ink will move backwards from the waist into the plate by relative to the direction of rotation and will also be drawn outside the waist instead of stay at the bottom of it, which results in a lower quality print and a irregular paper inking.

Le but de l'invention est de remédier à ces inconvénients en améliorant les plaques d'impressions connues.The object of the invention is to remedy these drawbacks by improving the plates of known impressions.

Plus particulièrement, l'un des buts de l'invention est de proposer une plaque d'impression taille-douce permettant un encrage de qualité malgré le fait que l'encrage se fait dans un système en mouvement. More particularly, one of the aims of the invention is to propose a plate intaglio printing allowing quality inking despite the fact that inking is done in a moving system.

La plaque selon l'invention est définie par les caractéristiques contenues dans les revendications.The plate according to the invention is defined by the characteristics contained in the claims.

L'invention sera mieux comprise par la description d'un mode d'exécution de celle-ci et des figures qui s'y rapportent.The invention will be better understood by the description of an embodiment thereof and related figures.

La figure 1 montre une vue schématique en coupe d'une plaque d'impression taille-douce selon l'état de la technique.Figure 1 shows a schematic sectional view of an intaglio printing plate according to the state of the art.

La figure 2 montre une vue schématique en coupe d'une plaque d'impression taille-douce selon un premier mode d'exécution de l'invention.Figure 2 shows a schematic sectional view of an intaglio printing plate according to a first embodiment of the invention.

La figure 3 montre une vue schématique en coupe d'une plaque d'impression taille-douce selon un deuxième mode d'exécution.Figure 3 shows a schematic sectional view of an intaglio printing plate according to a second embodiment.

La figure 4 montre une vue schématique en coupe d'une plaque d'impression taille-douce selon un troisième mode d'exécution de l'invention.Figure 4 shows a schematic sectional view of an intaglio printing plate according to a third embodiment of the invention.

Une plaque d'impression taille-douce qui est connue dans l'art antérieur est décrite de façon schématique en référence à la figure 1. La plaque 1 comporte principalement une surface externe 2 dans laquelle une gravure 3 a été créée. Dans cette gravure 3, de l'encre 4 est déposée en vue son utilisation pour marquer le substrat, par exemple du papier, imprimé. La rotation de la plaque est schématiquement représentée par la flèche référencée R et les forces qui agissent sur l'encre, lors de la production de substrat imprimé en taille-douce, par les flèches référencées f1 et f2 dont la résultante f12 est effectivement dirigée comme indiqué sur la figure.An intaglio printing plate which is known in the prior art is described from schematically with reference to Figure 1. The plate 1 mainly comprises a external surface 2 in which an engraving 3 has been created. In this engraving 3, by ink 4 is deposited for use in marking the substrate, for example paper, printed. The rotation of the plate is schematically represented by the arrow referenced R and the forces which act on the ink, during the production of substrate intaglio printed, by the arrows referenced f1 and f2 whose resultant f12 is actually directed as shown in the figure.

Dans la figure 2, le premier mode d'exécution des moyens de retenue de l'encre 4 sont représentés. Ces moyens ont la forme de créneaux 6 et sont principalement disposés sur la partie arrière de la gravure 3 par rapport au sens de rotation schématisé par la flèche R. Ces créneaux permettent ainsi de retenir l'encre dans la gravure et de s'opposer efficacement aux effets de la résultante f12 telle que représentée dans la figure 1.In FIG. 2, the first embodiment of the ink retaining means 4 are represented. These means have the form of slots 6 and are mainly arranged on the rear part of the engraving 3 with respect to the direction of rotation shown diagrammatically by the arrow A. These slots thus make it possible to retain the ink in the engraving and to oppose effectively to the effects of the resulting f12 as shown in Figure 1.

Un autre mode d'exécution des moyens de retenue est représenté dans la figure 3. Dans ce mode de réalisation, les moyens prennent la forme d'une denture 7 taillée dans la partie arrière de la gravure 3 par rapport au sens de rotation R de la plaque 1.Another embodiment of the retaining means is shown in Figure 3. In this embodiment, the means take the form of a toothing 7 cut in the rear part of the engraving 3 relative to the direction of rotation R of the plate 1.

Selon le mode d'exécution de la figure 4, les moyens de retenue ont la forme de creux 8 répartis dans la gravure 3, sur sa partie arrière par rapport au sens de rotation R de la plaque 1.According to the embodiment of Figure 4, the retaining means have the shape of a hollow 8 distributed in engraving 3, on its rear part relative to the direction of rotation R of the plate 1.

Bien entendu, il est possible de combiner ces différents modes d'exécution de moyens de retenue, ou encore de varier la taille des créneaux 6, denture 7 ou creux 8 en fonction de leur position dans la gravure, voire encore de combiner différentes formes géométriques pour optimiser la retenue de l'encre sur une plaque 1, le but étant de s'opposer aux effets de la résultante f12.Of course, it is possible to combine these different modes of execution of means to retain, or to vary the size of the slots 6, teeth 7 or hollow 8 depending of their position in the engraving, or even to combine different shapes to optimize the retention of ink on a plate 1, the aim being to oppose the effects of the resultant f12.

Une telle plaque d'impression peut ensuite être montée sans autre dans l'une des machines connues des brevets US 5,062,359 et US 5,899,145 incorporés dans la présente demande.Such a printing plate can then be mounted without other in one of the machines known from US Patents 5,062,359 and US 5,899,145 incorporated in the this request.

Différents procédés connus peuvent être utilisés pour la fabrication de plaques selon l'invention. L'on peut notamment mentionner une gravure mécanique ou par laser de la surface de la plaque d'impression.Different known processes can be used for the manufacture of plates according to the invention. Mention may in particular be made of a mechanical or laser engraving of the surface of the printing plate.

Claims (7)

Plaque d'impression taille-douce (1) comprenant des gravures (3) formant un motif taillées dans la surface (2) de ladite plaque, lesdites gravures (3) étant destinées à recevoir de l'encre (4) pour l'impression dudit motif sur un support d'impression, caractérisée en ce que lesdites gravures (3) comprennent des moyens (6,7,8) de retenue de l'encre.Intaglio printing plate (1) comprising engravings (3) forming a pattern cut in the surface (2) of said plate, said engravings (3) being intended to receive ink (4) for printing of said pattern on a printing medium, characterized in that said engravings (3) comprise means (6,7,8) for retaining the ink. Plaque d'impression selon la revendication 1, caractérisée en ce que lesdits moyens comprennent un profil (6,7,8) formé dans l'une au moins des parois des gravures (3).Printing plate according to claim 1, characterized in that said means comprise a profile (6,7,8) formed in at least one of the walls of the engravings (3). Plaque d'impression selon la revendication 2, caractérisé en ce que ledit profil comporte des créneaux (6).Printing plate according to claim 2, characterized in that said profile includes slots (6). Plaque d'impression selon la revendication 2, caractérisé en ce que ledit profil comporte des dentures (7).Printing plate according to claim 2, characterized in that said profile has teeth (7). Plaque d'impression selon la revendication 2, caractérisé en ce que ledit profil comporte des creux (8).Printing plate according to claim 2, characterized in that said profile has recesses (8). Plaque d'impression selon la revendication 2, caractérisé en ce que ledit profil comporte une combinaison de créneaux (6), de dentures (7) et/ou de creux (8).Printing plate according to claim 2, characterized in that said profile comprises a combination of slots (6), teeth (7) and / or depressions (8). Machine d'impression, caractérisée en ce qu'elle comprend au moins une plaque d'impression (1) selon l'une des revendications précédentes.Printing machine, characterized in that it comprises at least one printing plate (1) according to one of the preceding claims.
EP20020405752 2002-09-02 2002-09-02 Smooth cut printing plate Withdrawn EP1393925A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP20020405752 EP1393925A1 (en) 2002-09-02 2002-09-02 Smooth cut printing plate
AU2003253212A AU2003253212A1 (en) 2002-09-02 2003-08-21 Smooth cut printing plate
PCT/IB2003/003748 WO2004020212A1 (en) 2002-09-02 2003-08-21 Smooth cut printing plate
AT03791129T ATE321672T1 (en) 2002-09-02 2003-08-21 GRAPHIC PLATE
DE60304362T DE60304362T2 (en) 2002-09-02 2003-08-21 LOW PRESSURE PLATE
EP03791129A EP1551641B1 (en) 2002-09-02 2003-08-21 Smooth cut printing plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20020405752 EP1393925A1 (en) 2002-09-02 2002-09-02 Smooth cut printing plate

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EP1393925A1 true EP1393925A1 (en) 2004-03-03

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EP03791129A Expired - Lifetime EP1551641B1 (en) 2002-09-02 2003-08-21 Smooth cut printing plate

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EP (2) EP1393925A1 (en)
AT (1) ATE321672T1 (en)
AU (1) AU2003253212A1 (en)
DE (1) DE60304362T2 (en)
WO (1) WO2004020212A1 (en)

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EP1671806A1 (en) * 2004-12-15 2006-06-21 Hueck Folien GmbH & Co. KG Intaglio printing tool
FR2942811A1 (en) * 2009-03-04 2010-09-10 Oberthur Technologies SECURITY ELEMENT FOR DOCUMENT-VALUE.
WO2012130907A1 (en) 2011-03-30 2012-10-04 Oberthur Fiduciaire Sas Security element for a value document, manufacturing method, and corresponding document
US20140312608A1 (en) * 2011-11-18 2014-10-23 Fabrica Nacional De Moneda Y Timbre-Real Casa De L Moneda Object comprising a region of its surface suitable for showing a plurality of images
EP3928982A1 (en) * 2020-06-18 2021-12-29 Oesterreichische Banknoten- und Sicherheitsdruck GmbH Method for engraving an intaglio deep pressure plate

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CH491753A (en) * 1969-06-25 1970-06-15 De La Rue Giori Sa Steel engraving printing plate
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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1671806A1 (en) * 2004-12-15 2006-06-21 Hueck Folien GmbH & Co. KG Intaglio printing tool
FR2942811A1 (en) * 2009-03-04 2010-09-10 Oberthur Technologies SECURITY ELEMENT FOR DOCUMENT-VALUE.
WO2010100360A1 (en) * 2009-03-04 2010-09-10 Oberthur Technologies Security element for a value document
CN102292219A (en) * 2009-03-04 2011-12-21 欧贝特科技公司 Security element for a value document
CN102292219B (en) * 2009-03-04 2013-10-23 欧贝特科技公司 Security element for value document
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CN102729673A (en) * 2011-03-30 2012-10-17 欧贝特技术公司 Security element for a value document, manufacturing method, and corresponding document
FR2973398A1 (en) * 2011-03-30 2012-10-05 Oberthur Technologies SECURITY ELEMENT FOR VALUE DOCUMENT, MANUFACTURING METHOD, AND CORRESPONDING DOCUMENT
WO2012130907A1 (en) 2011-03-30 2012-10-04 Oberthur Fiduciaire Sas Security element for a value document, manufacturing method, and corresponding document
CN102729673B (en) * 2011-03-30 2015-06-17 欧贝特技术公司 Security element for a value document, manufacturing method, and corresponding document
RU2586130C2 (en) * 2011-03-30 2016-06-10 Обертур Фидюсьер Сас Protective element for valuable document, method of production and corresponding document
US20140312608A1 (en) * 2011-11-18 2014-10-23 Fabrica Nacional De Moneda Y Timbre-Real Casa De L Moneda Object comprising a region of its surface suitable for showing a plurality of images
US9682591B2 (en) * 2011-11-18 2017-06-20 Fábrica Nacional De Moneda Y Timbre Real Casa De La Moneda Object comprising a region of its surface suitable for showing a plurality of images
EP3928982A1 (en) * 2020-06-18 2021-12-29 Oesterreichische Banknoten- und Sicherheitsdruck GmbH Method for engraving an intaglio deep pressure plate

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ATE321672T1 (en) 2006-04-15
EP1551641B1 (en) 2006-03-29
EP1551641A1 (en) 2005-07-13
DE60304362D1 (en) 2006-05-18
AU2003253212A1 (en) 2004-03-19
DE60304362T2 (en) 2006-11-30
WO2004020212A1 (en) 2004-03-11

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