EP1551641A1 - Smooth cut printing plate - Google Patents

Smooth cut printing plate

Info

Publication number
EP1551641A1
EP1551641A1 EP03791129A EP03791129A EP1551641A1 EP 1551641 A1 EP1551641 A1 EP 1551641A1 EP 03791129 A EP03791129 A EP 03791129A EP 03791129 A EP03791129 A EP 03791129A EP 1551641 A1 EP1551641 A1 EP 1551641A1
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.)
Granted
Application number
EP03791129A
Other languages
German (de)
French (fr)
Other versions
EP1551641B1 (en
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 EP03791129A priority Critical patent/EP1551641B1/en
Publication of EP1551641A1 publication Critical patent/EP1551641A1/en
Application granted granted Critical
Publication of EP1551641B1 publication Critical patent/EP1551641B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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 for example for printing securities such as banknotes, checks and other similar documents.
  • the intaglio printing technique is well known in the state of the art, in particular for printing securities.
  • a printing plate is engraved to form a predetermined pattern and the engravings are then filled with ink which will be transferred to the printed support, for example paper, which is deformed by pressure by means of a cylinder, having an elastic surface, in the engravings of the plate.
  • the surface of the paper which enters the engravings is thus marked with the ink which was previously deposited in said engravings.
  • intaglio printing plate As an example of an intaglio printing plate, reference is made to US Pat. No. 4,036,130, the content of which is incorporated by reference in the present application. Such a plate, usually made of metal, is engraved to form a specific pattern and can receive an additional hardened layer.
  • application DE 196 24 131 describes another automated process for manufacturing intaglio printing plates by means of a laser.
  • Patent application DE 198 45 440 shows another embodiment of intaglio printing plates for flat printing, the plates described comprising engravings the bottom of which has partitions forming channels or chambers allowing the transfer of the ink in a vertical direction only, that is to say 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 support.
  • 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 etching the plate, the depth of which varies so that the amount of ink in the etching also varies so that the amount of ink transferred onto the printed substrate is different, thus creating variable intensities.
  • the production rate of these intaglio printing machines can be up to 10,000 sheets per hour, which typically corresponds to a linear speed of 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 towards the back of the size in the plate with respect to the direction of rotation and will also be attracted towards the outside of the size instead of remaining at the bottom of it. which results in lower quality printing and irregular inking of the paper.
  • the object of the invention is to remedy these drawbacks by improving the known printing plates.
  • one of the objects of the invention is to propose an intaglio printing plate allowing a quality inking despite the fact that the inking is done in a moving system.
  • the plate according to the invention is defined by the characteristics contained in the claims.
  • Figure 1 shows a schematic sectional view of an intaglio printing plate according to the prior 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 an external surface 2 in which an engraving 3 has been created.
  • ink 4 is deposited for use in marking the substrate, for example printed paper.
  • 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 intaglio printed substrate, by the arrows referenced fl and f2 whose resultant fl2 is effectively directed as shown in the figure.
  • the first embodiment of the ink retaining means 4 are shown. 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 etching and to effectively oppose the effects of the resultant fl2 as shown in FIG. 1.
  • FIG. 3 Another embodiment of the retaining means is shown in FIG. 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 plate 1.
  • the retaining means have the form of hollows 8 distributed in the etching 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 present application.

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

Plaque d'impression taille-douce Intaglio printing plate
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 for 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 intaglio printing technique is well known in the state of the art, in particular for printing securities. According to this technique, a printing plate is engraved to form a predetermined pattern and the engravings are then filled with ink which will be transferred to the printed support, for example paper, which is deformed by pressure by means of a cylinder, having an elastic surface, in the engravings of the plate. The surface of the paper which enters the engravings is thus marked with the 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 into the present application with regard to the principle of the printing process and the means necessary for carrying it out.
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 Pat. No. 4,036,130, the content of which is incorporated by reference in the present application. Such a plate, usually made of metal, is engraved to form a specific pattern and can receive an additional hardened layer. In addition, application DE 196 24 131 describes another automated process for manufacturing intaglio printing plates by means of 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. Ces canaux permettent également la modulation de l'épaisseur de l'encre déposée sur le support imprimé.Patent application DE 198 45 440 shows another embodiment of intaglio printing plates for flat printing, the plates described comprising engravings the bottom of which has partitions forming channels or chambers allowing the transfer of the ink in a vertical direction only, that is to say 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 support.
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 etching the plate, the depth of which varies so that the amount of ink in the etching also varies so that the amount of ink transferred onto the printed substrate is different, thus creating variable 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 the printing plates used in the intaglio printing technique 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 in the present application.
La cadence de production de ces machines d'impression taille-douce peut s'élever jusqu'à lO'OOO 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 be up to 10,000 sheets per hour, which typically corresponds to a linear speed of 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 towards the back of the size in the plate with respect to the direction of rotation and will also be attracted towards the outside of the size instead of remaining at the bottom of it. which results in lower quality printing and irregular inking of the paper.
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 known printing plates.
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. La plaque selon l'invention est définie par les caractéristiques contenues dans les revendications.More particularly, one of the objects of the invention is to propose an intaglio printing plate allowing a quality inking despite the fact that the inking is done in a moving system. 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 the figures relating thereto.
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 prior 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 fl et f2 dont la résultante fl2 est effectivement dirigée comme indiqué sur la figure.An intaglio printing plate which is known in the prior art is described schematically with reference to FIG. 1. The plate 1 mainly comprises an external surface 2 in which an engraving 3 has been created. In this etching 3, ink 4 is deposited for use in marking the substrate, for example printed paper. 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 intaglio printed substrate, by the arrows referenced fl and f2 whose resultant fl2 is effectively 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 fl2 telle que représentée dans la figure 1.In Figure 2, the first embodiment of the ink retaining means 4 are shown. 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 etching and to effectively oppose the effects of the resultant fl2 as shown in FIG. 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 FIG. 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 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 FIG. 4, the retaining means have the form of hollows 8 distributed in the etching 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 fl2.Of course, it is possible to combine these different embodiments of retaining means, or to vary the size of the slots 6, teeth 7 or hollow 8 according to their position in the engraving, or even to combine different geometric shapes. to optimize the retention of the ink on a plate 1, the aim being to oppose the effects of the resultant fl2.
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 present application.
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 methods can be used for the manufacture of plates according to the invention. Mention may in particular be made of a mechanical or laser etching of the surface of the printing plate.

Claims

Revendications claims
1. 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.1. 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 the printing of said pattern on a printing medium, characterized in that said engravings (3) comprise means (6, 7, 8) for retaining the ink.
2. 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).2. 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).
3. Plaque d'impression selon la revendication 2, caractérisé en ce que ledit profil comporte des créneaux (6).3. Printing plate according to claim 2, characterized in that said profile includes slots (6).
4. Plaque d'impression selon la revendication 2, caractérisé en ce que ledit profil comporte des dentures (7).4. Printing plate according to claim 2, characterized in that said profile has teeth (7).
5. Plaque d'impression selon la revendication 2, caractérisé en ce que ledit profil comporte des creux (8).5. Printing plate according to claim 2, characterized in that said profile comprises recesses (8).
6. 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).6. Printing plate according to claim 2, characterized in that said profile comprises a combination of slots (6), teeth (7) and / or recesses (8).
7. Machine d'impression, caractérisée en ce qu'elle comprend au moins une plaque d'impression (1) selon l'une des revendications précédentes. 7. Printing machine, characterized in that it comprises at least one printing plate (1) according to one of the preceding claims.
EP03791129A 2002-09-02 2003-08-21 Smooth cut printing plate Expired - Lifetime EP1551641B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP03791129A EP1551641B1 (en) 2002-09-02 2003-08-21 Smooth cut printing plate

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP20020405752 EP1393925A1 (en) 2002-09-02 2002-09-02 Smooth cut printing plate
EP02405752 2002-09-02
PCT/IB2003/003748 WO2004020212A1 (en) 2002-09-02 2003-08-21 Smooth cut printing plate
EP03791129A EP1551641B1 (en) 2002-09-02 2003-08-21 Smooth cut printing plate

Publications (2)

Publication Number Publication Date
EP1551641A1 true EP1551641A1 (en) 2005-07-13
EP1551641B1 EP1551641B1 (en) 2006-03-29

Family

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Application Number Title Priority Date Filing Date
EP20020405752 Withdrawn EP1393925A1 (en) 2002-09-02 2002-09-02 Smooth cut printing plate
EP03791129A Expired - Lifetime EP1551641B1 (en) 2002-09-02 2003-08-21 Smooth cut printing plate

Family Applications Before (1)

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

Country Status (5)

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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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Publication number Priority date Publication date Assignee Title
EP1671806A1 (en) * 2004-12-15 2006-06-21 Hueck Folien GmbH & Co. KG Intaglio printing tool
FR2942811B1 (en) * 2009-03-04 2011-05-06 Oberthur Technologies SECURITY ELEMENT FOR DOCUMENT-VALUE.
FR2973398B1 (en) * 2011-03-30 2013-04-12 Oberthur Technologies SECURITY ELEMENT FOR VALUE DOCUMENT, MANUFACTURING METHOD, AND CORRESPONDING DOCUMENT
EP2594149A1 (en) * 2011-11-18 2013-05-22 Fabrica Nacional De Moneda Y Timbre - Real Casa De La Moneda Object comprising a region of its surface suitable for showing a plurality of images
AT523951B1 (en) * 2020-06-18 2023-03-15 Oesterreichische Banknoten Und Sicherheitsdruck Gmbh PROCEDURE FOR ENGRAVING AN INTAGLIO GRAPHIC PLATE

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CH491753A (en) * 1969-06-25 1970-06-15 De La Rue Giori Sa Steel engraving printing plate
CH581543A5 (en) 1974-07-30 1976-11-15 De La Rue Giori Sa
FR2378636A1 (en) * 1977-01-28 1978-08-25 Beaune Daniel SOFT SIZE PRINTING PROCESS AND MACHINE FOR IMPLEMENTING THIS PROCESS
EP0142874B1 (en) 1983-11-14 1988-04-27 De La Rue Giori S.A. Plate cylinder with a device for affixing gravure printing plates for a web-printing machine
EP0406157B1 (en) 1989-06-29 1994-05-18 De La Rue Giori S.A. Platen printing machine for printing security paper
DE19624131A1 (en) 1996-06-17 1997-12-18 Giesecke & Devrient Gmbh Process for the production of embossing plates
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DE19845436C5 (en) 1998-10-02 2015-02-26 Giesecke & Devrient Gmbh Intaglio printing method for printing adjacent color areas of different ink layer thickness, data carrier with printed image produced by intaglio printing, printing plate and method for producing a printing plate
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Title
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Also Published As

Publication number Publication date
ATE321672T1 (en) 2006-04-15
EP1393925A1 (en) 2004-03-03
EP1551641B1 (en) 2006-03-29
WO2004020212A1 (en) 2004-03-11
DE60304362D1 (en) 2006-05-18
AU2003253212A1 (en) 2004-03-19
DE60304362T2 (en) 2006-11-30

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