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EP1644200A1 - Procede de fabrication d'une plaque d'impression pour l'impression en creux et plaque d'impression pour l'impression en creux - Google Patents

Procede de fabrication d'une plaque d'impression pour l'impression en creux et plaque d'impression pour l'impression en creux

Info

Publication number
EP1644200A1
EP1644200A1 EP04737017A EP04737017A EP1644200A1 EP 1644200 A1 EP1644200 A1 EP 1644200A1 EP 04737017 A EP04737017 A EP 04737017A EP 04737017 A EP04737017 A EP 04737017A EP 1644200 A1 EP1644200 A1 EP 1644200A1
Authority
EP
European Patent Office
Prior art keywords
lines
printing
printing plate
intaglio
depressions
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.)
Ceased
Application number
EP04737017A
Other languages
German (de)
English (en)
Inventor
Roland Mayerhofer
Harald Deinhammer
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.)
Oesterreichische Banknoten und Sicherheitsdruck GmbH
Original Assignee
Oesterreichische Banknoten und Sicherheitsdruck GmbH
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 Oesterreichische Banknoten und Sicherheitsdruck GmbH filed Critical Oesterreichische Banknoten und Sicherheitsdruck GmbH
Publication of EP1644200A1 publication Critical patent/EP1644200A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41NPRINTING 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
    • B41N1/00Printing plates or foils; Materials therefor
    • B41N1/04Printing plates or foils; Materials therefor metallic
    • B41N1/06Printing plates or foils; Materials therefor metallic for relief printing or intaglio printing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41CPROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00Forme preparation
    • B41C1/02Engraving; Heads therefor
    • B41C1/04Engraving; Heads therefor using heads controlled by an electric information signal
    • B41C1/05Heat-generating engraving heads, e.g. laser beam, electron beam

Definitions

  • the invention relates to a method for producing a printing plate for intaglio intaglio printing.
  • a further disadvantage is that errors often occur during the electroplating or the detachment of the electrodeposited layer, which require a lengthy retouching of the work die or the pressure plate, the work die or the pressure plate possibly having to be eliminated.
  • Another disadvantage is that the depth of the lines, which depends in particular on the exposure time and the line width, cannot be selected independently of one another.
  • the object of the invention is to provide a method of the type mentioned, in which the known disadvantages are avoided, which requires little time and is highly reliable and accurate.
  • this is achieved in that recesses and / or lines are introduced into a base body made of a brass alloy and / or with an outer layer made of a brass alloy.
  • the pressure plate has the required strength, the stability can be increased in particular by chrome plating. Furthermore, fine structures can be introduced into the base body with the laser. The accuracy of these structures can be reduced by an aftertreatment Melting burrs can still be improved. Another advantage is that the depth of the lines can be selected independently of one another, which makes it possible to increase the security of documents produced with the printing plate.
  • melt burrs are removed after the indentations and / or lines have been introduced.
  • the accuracy of the lines and / or depressions can be increased considerably, which improves the reproducibility of the printing plate and its resolution , an electrolytic bath or the like.
  • the melting ridges can be removed quickly and easily with a chemical aftertreatment, whereby only the copper oxide or the zinc oxide of the melting ridges are removed and not the material of the base body.
  • the acid bath comprises acetic acid, phosphoric acid and nitric acid, in particular about 40% by volume of acetic acid, 50% by volume of phosphoric acid and 10% by volume of nitric acid.
  • the depth for each of the depressions and / or lines and or for a group of depressions and / or lines is predetermined independently of one another.
  • An additional security feature can be formed by a different choice of the depth of the depressions and / or lines, as a result of which the security against forgery of documents produced with the printing plate can be increased.
  • a flat plate is used as the base body. A flat plate can be machined easily and quickly, as a result of which the required manufacturing time for the printing plate can be kept particularly short.
  • an engraving head connected to the laser and / or the base body with one in at least two different and movable to the flat plate substantially parallel directions
  • Carriage element is attached.
  • the engraving head and / or the base plate can be easily moved in the direction of the lines and / or depressions to be produced. Furthermore, the movement can be optimized so that a short as possible
  • Manufacturing time of the printing plate is reached and the proportion of areas that are not to be covered is as small as possible.
  • the base body is chrome-plated in a further process step. becomes.
  • the chrome plating can reduce the service life of
  • Pressure plate can be increased further.
  • the emitting of laser pulses is monitored by a control device.
  • Control device a proper formation of the wells and / or lines can be monitored in a simple manner, which enables immediate post-treatment of omitted laser pulses and the reliability of the invention
  • the invention further relates to a printing plate for intaglio intaglio printing.
  • Nickel The disadvantage here is that the production of these printing plates are very time-consuming and, due to the production process, lengthy retouching and post-processing steps, such as grinding, polishing or the like, of the printing plates are required, the printing plate being due to
  • the object of the invention is to provide a printing plate of the type mentioned above, which avoids the known disadvantages and is simple and quick to produce.
  • Brass alloy and / or covered with an outer layer of a brass alloy.
  • Stability can be increased in particular by chrome plating. Furthermore, fine structures can be introduced into the base body with a laser, the
  • Vickers hardness of the brass alloy is greater than 140. This can be sufficient
  • Embodiments are shown, described in more detail. It shows
  • FIG. 2 shows the area on a banknote printed with intaglio intaglio printing.
  • FIG. 1 shows the process sequences of two known methods and an embodiment of a method according to the invention for producing a printing plate for intaglio intaglio printing.
  • the numbers in the circles indicate those for each
  • a graphic 1 is assumed, which is in particular in electronic form as
  • Data file can be present.
  • a film is first exposed in a method step 6, which essentially has the size of a base plate to be produced, on which the graphic 1 is arranged several times.
  • Method step 15 generates a working die by means of galvanic molding, in which flaws are retouched in a method step 16.
  • Method step 16 generates a working die by means of galvanic molding, in which flaws are retouched in a method step 16.
  • a pressure plate is produced from the work die by means of galvanic molding, which is retouched in a method step 18 and chrome-plated in a method step 4, whereby a finished pressure plate 5 is obtained. This procedure takes about 15 days.
  • a polymer image 8 In order to obtain the working die, on which the graphic 1 is contained several times, in the intermediate steps 8 to 15 a polymer image 8, electroplating 9, subsequent retouching 10 and renewed electroplating 11 become a single image
  • An embossing plate is produced, with which after individual retouching 12, a plurality of individual images are embossed in a method step 13, which are combined in method step 14 to form a full image, from which the working die is electroplated in method step 15.
  • the further process for producing the finished printing plate corresponds to the process described above. It takes about 48 days to produce a finished printing plate.
  • printing plates are usually mounted on a printing roller for intaglio gravure printing. It takes about 9 more days to produce two more printing plates from the work die.
  • depressions and / or lines are introduced into a base body made of a brass alloy with a laser.
  • a base body made of a composite material with an outer layer made of a brass alloy can also be provided.
  • Brass refers to copper-zinc alloys that have at least 50% Cu. In addition to copper and zinc, brass can also contain up to 3% lead. If other elements besides lead are added, one speaks of special brasses. Brass alloys in the sense of the invention can be both brasses and special brasses.
  • the information in a graphics file is converted directly into control commands for the laser by means of a computer-controlled laser system.
  • the printing plate can be produced immediately after the graphics file has been created, essentially no further intermediate steps being required.
  • the depth of the depressions and / or lines is also specified. This can be done for each well and / or line individually or together for a group of wells and / or lines.
  • the specifications of the individual depths are independent of each other. Different depths can be easily achieved in the method according to the invention by regulating the power of the laser beam or by repeated lasering.
  • the depth of the depressions and / or lines can be predetermined regardless of their width in the method according to the invention. It can also be provided that the depth of an individual line changes over the course thereof, it being possible for the width of this line to remain the same.
  • a solid-state basic mode laser preferably a diode-pumped, Nd: Y AG laser, can be used as the laser.
  • the laser beam penetrates the material surface in a cone shape. Melting processes occur in the edge area of the focused beam, which cause part of the material to solidify into unwanted ejections and splashes.
  • the type and size of the edge ejection depend on the material, the pulse power and the engraving depth.
  • the laser can be used to engrave metals, ceramics and some plastics, whereby the power density of the laser beam is so high that the material evaporates during processing - 'partially evaporates within a few nanoseconds, the material creates a colorless recess - the engraving.
  • the interaction of the melted base material with the atmospheric oxygen often forms oxides, which due to their color make the engraving stand out more clearly.
  • the depressions and or lines can be introduced particularly quickly and easily, as a result of which the required production time can be kept short. It can be provided that an engraving head connected to the laser and / or the base plate is fastened with a slide element that can be moved in at least two different directions that are essentially parallel to the flat plate, so that an engraving head movable in the xy direction and or one in the xy direction Direction movable base plate is formed.
  • a movement sequence can be determined for a predefinable template, in particular the graphic file mentioned above, which ensures the shortest possible production time of the printing plate. It is not necessary to completely paint over areas into which lines and / or depressions cannot be made.
  • the engraving head can have fixed optics or a galvanically deflected mirror system (galvo system). A particularly good quality of the laser and a short manufacturing time can be achieved by a combination of these two optics.
  • a plurality of galvanically deflected mirror systems can be provided, which are optimized for different line widths and depth ranges.
  • vector-based graphics 1 can also be processed with the engraving head and thus only those areas can be specifically processed which contain a printed image.
  • FIG. 2 shows a bank note 20 which has an area 21 with intaglio intaglio printing. It is common for region 21 not to extend over the entire banknote 20.
  • the base body can also be curved, in particular in the form of a cylinder, cylinder section or the like.
  • the reliability and quality of the printing plate when the depressions and / or lines are introduced can be monitored in a simple manner by means of a control device by detecting the emission of laser pulses. If a laser pulse is not emitted, the control device can initiate the command to re-emit a laser pulse, thereby reducing the risk of defects.
  • the accuracy of the depressions and / or lines can be improved if the melting burrs which arise when the depressions and / or lines are introduced into the base body are removed.
  • These melting ridges consist essentially of oxidized material of the base body, in particular of copper oxide or zinc oxide.
  • a chemical aftertreatment which can in particular comprise an acid bath, an electrolytic bath or the like, appears to be particularly suitable for removing the melt burrs. It can be ensured that the copper oxide or zinc oxide, but not the brass alloy of the base body, is removed by the chemical aftertreatment.
  • the chemical aftertreatment can be carried out in particular by immersing the base body in an acid bath or the like, which comprises phosphoric acid, acetic acid, nitric acid, arsenic acid or the like, or a combination of these acids.
  • An acid bath comprising acetic acid, phosphoric acid and nitric acid appears to be particularly favorable, the acid bath in particular can have about 40% by volume of acetic acid, 50% by volume of phosphoric acid and 10% by volume of nitric acid.
  • Removal of the melt burrs can further be provided for retouching and / or checking the printing plate in order to be able to identify and correct any imperfections that may be present.
  • the service life of the printing plate can be further improved if the base body is chrome-plated in a further process step.
  • a printing plate for intaglio intaglio printing which has a base body made of a brass alloy and / or
  • Base body can be introduced.
  • melt burrs formed by the laser can be removed quickly and easily from a brass alloy by post-treatment.
  • Brass alloy has a Vickers hardness greater than 140.
  • the printing plate according to the invention can have depressions and or lines different
  • the depth of the depressions and / or lines being predeterminable regardless of the width of the depressions and / or lines.
  • the different depths of the depressions and / or lines can form an independent security feature or can be part of another security feature.
  • lines with a running depth can be provided.
  • Laser can be processed and the ejection can be removed as simply and, above all, selectively.
  • nickel or steel also appear for the To be less suitable for use in the method according to the invention.
  • Intaglio gravure can be used in security printing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Printing Plates And Materials Therefor (AREA)

Abstract

L'invention concerne un procédé de fabrication d'une plaque d'impression pour l'impression en creux, consistant à créer des cavités ou des lignes au laser dans un corps de base composé d'alliage de laiton et/ou présentant une couche extérieure d'alliage de laiton.
EP04737017A 2003-07-03 2004-06-18 Procede de fabrication d'une plaque d'impression pour l'impression en creux et plaque d'impression pour l'impression en creux Ceased EP1644200A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0102103A AT504185B1 (de) 2003-07-03 2003-07-03 Verfahren zur herstellung einer druckplatte
PCT/AT2004/000210 WO2005002869A1 (fr) 2003-07-03 2004-06-18 Procede de fabrication d'une plaque d'impression pour l'impression en creux et plaque d'impression pour l'impression en creux

Publications (1)

Publication Number Publication Date
EP1644200A1 true EP1644200A1 (fr) 2006-04-12

Family

ID=33556907

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04737017A Ceased EP1644200A1 (fr) 2003-07-03 2004-06-18 Procede de fabrication d'une plaque d'impression pour l'impression en creux et plaque d'impression pour l'impression en creux

Country Status (9)

Country Link
US (1) US20060254444A1 (fr)
EP (1) EP1644200A1 (fr)
JP (1) JP2007535417A (fr)
AT (1) AT504185B1 (fr)
AU (1) AU2004253597B2 (fr)
CA (1) CA2532300A1 (fr)
RU (1) RU2323096C2 (fr)
WO (1) WO2005002869A1 (fr)
ZA (1) ZA200600793B (fr)

Families Citing this family (11)

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AT501319B1 (de) * 2005-01-17 2007-08-15 Oebs Gmbh Verfahren zum aufbringen eines metallelementes auf ein sicherheitsdokument
US7949148B2 (en) 2006-01-23 2011-05-24 Digimarc Corporation Object processing employing movement
DE102007044653A1 (de) * 2007-09-18 2009-03-19 Hell Gravure Systems Gmbh & Co. Kg Verfahren, Vorrichtung und Tiefdruckform zur direkten Lasergravur
DE102008015162B3 (de) * 2008-03-20 2009-10-15 Hell Gravure Systems Gmbh & Co. Kg Verfahren und Vorrichtung zur Bearbeitung von Tiefdruckzylindern
EP2119527A1 (fr) 2008-05-16 2009-11-18 Kba-Giori S.A. Procédé et système pour la fabrication de plaques d'impression en creux pour la production de papiers sécurisés
DE102010056306B4 (de) * 2010-12-27 2013-07-11 Hell Gravure Systems Gmbh & Co. Kg Verfahren zur Gravur von Strukturen in eine Oberfläche eines Zylinders
PL2540487T3 (pl) * 2011-06-29 2015-12-31 Hueck Rheinische Gmbh Blacha do wytłaczania albo taśma bez końca mające strukturę obudowie warstwowej, sposób wytwarzania takiej blachy i taśmy bez końca oraz sposób wytwarzania wytłaczanych materiałów przy użyciu tego rodzaju blachy lub taśmy ciągłej
AT511830B1 (de) * 2011-08-25 2013-03-15 Oebs Gmbh Verfahren zum gravieren einer druckplatte
US20140020587A1 (en) * 2012-07-19 2014-01-23 Kurt M. Sanger Embedding data with offset printing
DE102015001263B4 (de) * 2015-02-04 2021-06-10 MAPA-Tech GmbH & Co. KG Markiervorrichtung mit Linearmotoren
DE102015121233A1 (de) * 2015-12-07 2017-06-08 Biotronik Se & Co. Kg Verfahren zum Behandeln eines metallischen Werkstücks

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WO1997048555A1 (fr) * 1996-06-17 1997-12-24 Giesecke & Devrient Gmbh Procede de production de plaques a gaufrer
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WO2000020217A1 (fr) 1998-10-02 2000-04-13 Giesecke & Devrient Gmbh Procede d'heliogravure destine a l'impression complete de grandes surfaces
WO2001049505A1 (fr) 1999-12-30 2001-07-12 Giesecke & Devrient Gmbh Support de donnees pourvu d'un element de securite imprime et procede de production par impression en heliogravure de celui-ci
WO2002020274A1 (fr) 2000-09-08 2002-03-14 Giesecke & Devrient Gmbh Support de donnees, son procede de fabrication et plaque d'impression helio
WO2002020279A1 (fr) 2000-09-08 2002-03-14 Giesecke & Devrient Gmbh Plaque d'heliogravure et document de valeur produit avec celle-ci
WO2002020268A1 (fr) 2000-09-08 2002-03-14 Giesecke & Devrient Gmbh Support de donnees en heliogravure et procedes de transposition de motifs d'images dans des structures lineaires ainsi que dans une plaque helio
EP1334822A2 (fr) 2002-02-06 2003-08-13 Tech Epikos - S.R.L. Procédé et installation permettant de graver au laser de plaques ou cylindres chalcographiques
EP1369230A1 (fr) 2002-06-05 2003-12-10 Kba-Giori S.A. Procédé de fabrication d'une plaque gravée

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CH484752A (de) * 1968-12-12 1970-01-31 De La Rue Giori Sa Stahlstichdruckplatte
WO1997048555A1 (fr) * 1996-06-17 1997-12-24 Giesecke & Devrient Gmbh Procede de production de plaques a gaufrer
WO2000020216A1 (fr) * 1998-10-02 2000-04-13 Giesecke & Devrient Gmbh Procede d'impression en heliogravure permettant d'imprimer des surfaces d'impression adjacentes dont les couches d'encre sont de differentes epaisseurs
WO2000020217A1 (fr) 1998-10-02 2000-04-13 Giesecke & Devrient Gmbh Procede d'heliogravure destine a l'impression complete de grandes surfaces
WO2001049505A1 (fr) 1999-12-30 2001-07-12 Giesecke & Devrient Gmbh Support de donnees pourvu d'un element de securite imprime et procede de production par impression en heliogravure de celui-ci
WO2002020274A1 (fr) 2000-09-08 2002-03-14 Giesecke & Devrient Gmbh Support de donnees, son procede de fabrication et plaque d'impression helio
WO2002020279A1 (fr) 2000-09-08 2002-03-14 Giesecke & Devrient Gmbh Plaque d'heliogravure et document de valeur produit avec celle-ci
WO2002020268A1 (fr) 2000-09-08 2002-03-14 Giesecke & Devrient Gmbh Support de donnees en heliogravure et procedes de transposition de motifs d'images dans des structures lineaires ainsi que dans une plaque helio
EP1334822A2 (fr) 2002-02-06 2003-08-13 Tech Epikos - S.R.L. Procédé et installation permettant de graver au laser de plaques ou cylindres chalcographiques
EP1369230A1 (fr) 2002-06-05 2003-12-10 Kba-Giori S.A. Procédé de fabrication d'une plaque gravée

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See also references of WO2005002869A1

Also Published As

Publication number Publication date
AT504185B1 (de) 2009-06-15
CA2532300A1 (fr) 2005-01-13
RU2006103075A (ru) 2006-07-27
AT504185A1 (de) 2008-03-15
ZA200600793B (en) 2008-05-28
RU2323096C2 (ru) 2008-04-27
WO2005002869A1 (fr) 2005-01-13
AU2004253597A1 (en) 2005-01-13
JP2007535417A (ja) 2007-12-06
US20060254444A1 (en) 2006-11-16
AU2004253597B2 (en) 2011-08-18

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