EP3928982A1 - Procédé de gravure d'une plaque d'impression en creux - Google Patents

Procédé de gravure d'une plaque d'impression en creux Download PDF

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Publication number
EP3928982A1
EP3928982A1 EP21178571.2A EP21178571A EP3928982A1 EP 3928982 A1 EP3928982 A1 EP 3928982A1 EP 21178571 A EP21178571 A EP 21178571A EP 3928982 A1 EP3928982 A1 EP 3928982A1
Authority
EP
European Patent Office
Prior art keywords
intaglio
engraving
micro
corrugation
printing plate
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.)
Pending
Application number
EP21178571.2A
Other languages
German (de)
English (en)
Inventor
Thomas Gassner
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 EP3928982A1 publication Critical patent/EP3928982A1/fr
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/02—Engraving; Heads therefor
    • B41C1/04—Engraving; Heads therefor using heads controlled by an electric information signal
    • B41C1/045—Mechanical engraving heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • B41M3/148—Transitory images, i.e. images only visible from certain viewing angles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/02—Engraving; Heads therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C1/00—Forme preparation
    • B41C1/02—Engraving; Heads therefor
    • B41C1/04—Engraving; Heads therefor using heads controlled by an electric information signal
    • B41C1/05—Heat-generating engraving heads, e.g. laser beam, electron beam
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/10—Intaglio printing ; Gravure printing

Definitions

  • the invention relates to a method for engraving an intaglio intaglio printing plate according to the preamble of claim 1.
  • Methods for producing an intaglio intaglio printing plate are known, the intaglio intaglio printing plate being engraved directly by means of a laser or graver.
  • Engraving processes that use direct ablation by means of a laser are also known as Direct Laser Engraving (DLE).
  • DLE Direct Laser Engraving
  • the surface of the intaglio printing plate blank is scanned in several layers by means of the laser in order to remove the surface layer by layer.
  • This means that complex three-dimensional depth profiles can also be produced for intaglio intaglio printing.
  • several two-dimensional engraving layers are generated from a three-dimensional depth profile, which are removed one after the other.
  • the object of the invention is therefore to provide a method of the type mentioned at the beginning, with which the mentioned disadvantages can be avoided, with which an intaglio intaglio printing plate for high quality intaglio printing can be easily produced.
  • the intaglio printing ink is better retained during the wiping step in engraving sections that run in the wiping direction.
  • the micro-corrugation prevents excessive color removal from, in particular, larger, contiguous surfaces, for example from a depression, of the intaglio intaglio intaglio printing plate during wiping.
  • the color application of lines along and across the wiping direction is more similar, because from engraving lines or lines. Engraved areas along the wiping direction less intaglio printing ink is wiped out.
  • an intaglio intaglio printing plate with an ink retention topography designed as a micro-corrugation is provided.
  • the object of the invention is therefore to provide an intaglio intaglio printing plate of the type mentioned at the beginning with which the disadvantages mentioned can be avoided and with which the quality of the intaglio intaglio printing can be improved.
  • a method of printing a security feature with the intaglio intaglio printing plate is also provided.
  • the object of the invention is therefore to provide a method of the type mentioned at the beginning with which the mentioned disadvantages can be avoided and with which the quality of intaglio intaglio printing can be improved.
  • Figures 1 to 11 show at least parts of a preferred embodiment of an intaglio intaglio printing plate 1 with an ink retaining topography designed as a micro-corrugation 9, 10.
  • a method for engraving an intaglio intaglio printing plate 1 wherein a depth profile 2 of the intaglio intaglio printing plate 1 is generated by engraving at least one engraving layer 4, 5, 6, 7, with at least one area of the depth profile 2 of the intaglio intaglio printing plate 1 being generated an ink retention topography is provided with a micro-corrugation 9, 10, the micro-corrugation 9, 10 being produced by engraving essentially parallel lines with a predetermined first line spacing 11.
  • a method for printing a security feature with an intaglio intaglio printing plate 1 wherein an intaglio intaglio intaglio printing ink is applied to the intaglio intaglio intaglio printing plate 1 in a wiping step, excess intaglio printing ink being wiped off the intaglio intaglio printing plate 1 along a wiping direction in a wiping step and wherein in a printing step the intaglio printing ink is transferred from the intaglio intaglio printing plate 1 to the object to be printed.
  • the intaglio printing ink is better retained during the wiping step in engraving sections that run in the wiping direction.
  • the micro-corrugation 9, 10 prevents excessive color removal from, in particular, larger, contiguous areas, for example from a depression, of the intaglio intaglio intaglio printing plate 1 during wiping.
  • the ink application of lines along and across the wiping direction is more similar because less intaglio printing ink is wiped out of engraved sections or engraved areas along the wiping direction.
  • micro-corrugation 9, 10 Due to the particularly flat micro-corrugation 9, 10 in the depth profile or over the engraved areas, no individual separating webs or further additional design elements need to be arranged around the Preserve color retention topography.
  • the micro-corrugation 9, 10 By engraving the micro-corrugation 9, 10 by means of essentially parallel lines with a predetermined first line spacing 11, good ink retention on the intaglio intaglio printing plate 1 can be produced easily and without additional design effort during the wiping step.
  • Intaglio intaglio printing is a printing process for printing with an engraved intaglio intaglio printing plate 1, whereby the shape of the engraving is not only applied as color to the sheets to be printed, but there is also a lasting and often tactile plastic deformation of the printed sheets , which is why intaglio intaglio printing is often used as a security feature for security documents such as banknotes, postage stamps or securities.
  • the intaglio intaglio printing plate 1 is used for the production of a security document, since this allows security features to be reliably applied in high quality to the security document.
  • the completely engraved intaglio intaglio printing plate 1 has, in particular, a three-dimensional depth profile 2, which is applied to the sheets to be printed in opposite directions during the printing process.
  • an essentially flat intaglio intaglio printing plate 1 is engraved.
  • Such flat intaglio intaglio printing plates 1 are particularly flexible in use.
  • a depth profile 2 of the intaglio intaglio printing plate 1 is generated by engraving several engraving layers 4, 5, 6, 7, with the engraving layers 4, 5, 6, 7 being determined on the basis of a predetermined target depth profile 16.
  • the engraving layers 4, 5, 6, 7 are preferably produced in such a way that a plurality of essentially parallel engraving sections are engraved in an overlapping manner, as a result of which a smooth surface is removed in total for the engraving layer 4, 5, 6, 7. It can particularly preferably be provided that continuous engraving paths are generated, therefore continuous lines are removed and no point grid is generated.
  • the overlapping engraving routes are exemplified in Fig. 5 as a result of which a smooth surface is created by the engraving layer, as in Fig. 6 is shown by way of example.
  • the engraving is carried out by means of a laser beam.
  • a printing plate consisting of metal, in particular brass is engraved directly by the laser beam.
  • directly engraved means that a so-called master made of a less stable material such as plastic is not first engraved and the final intaglio intaglio intaglio printing plate 1 is molded from this master, but the intaglio intaglio intaglio printing plate 1 intended for printing is engraved directly by the laser beam.
  • Brass has the advantage that it is easy to work with and at the same time can withstand the high mechanical loads of intaglio intaglio printing.
  • a pulse laser is used as the laser.
  • Such pulsed lasers do not emit the laser beam continuously, but in the form of periodically recurring short pulses, the instantaneous output power of the laser during the pulse being a multiple of the time-averaged output power of the laser.
  • a targeted removal of material from the intaglio intaglio printing plate 1 can be achieved without unduly high thermal stress on the intaglio intaglio printing plate 1.
  • Ultrashort pulse lasers are pulse lasers whose pulse duration is in the range of picoseconds, femtoseconds or attoseconds. Such an ultrashort pulse laser can have a pulse duration of a few picoseconds, for example. As a result of this short pulse duration and the high output power during a pulse of the ultrashort pulse laser, material from the intaglio intaglio printing plate is essentially ablated at specific points 1 without melting or evaporating adjacent areas.
  • a continuous laser is used as the laser.
  • the engraving layers 4, 5, 6, 7 and the micro-corrugation 9, 10 are engraved by means of a stylus.
  • the laser beam for the removal of an engraving layer 4, 5, 6, 7 is moved in parallel lines over the engraving area, in particular the speed of movement of the laser beam is kept approximately constant in every further line after an initial acceleration area up to an end deceleration area , and that the impingement of the laser beam on the engraved area is regulated by means of a shutter element.
  • the shutter element By means of the shutter element, the impact of the laser beam on an engraved area can be regulated as a function of a template.
  • the intaglio intaglio printing plate 1 can be engraved in a targeted manner, depending on the original, even with the laser beam moving at a constant speed.
  • the intaglio intaglio printing plate 1 has an ink retention topography in the form of micro-corrugations 9, 10, at least in some areas.
  • the ink retention topography is a topography of the intaglio intaglio printing plate 1, which is provided to prevent intaglio printing ink from being removed in the wiping step.
  • the micro-corrugation 9, 10 is in particular in the depth profile 2 of the intaglio intaglio printing plate arranged.
  • the micro-corrugation 9, 10 can also be referred to as microtopography.
  • the micro-corrugation 9, 10 can preferably be in the form of grooves arranged at a distance from one another. These grooves can preferably be essentially parallel to one another.
  • the micro-corrugation 9, 10 can be produced by engraving its own micro-corrugation layers 3, 8.
  • the micro-corrugation layers 3, 8 are similar to the other engraving layers, with one or more parameters being changed in such a way that a micro-corrugation 9, 10 is produced instead of a smooth surface. This is exemplified in the Figures 7 and 8 illustrated.
  • the engraving is carried out by means of a laser beam and that, for engraving the micro-corrugation 9, 10, the first line spacing 11 and the diameter of the laser beam are selected such that the micro-corrugation 9, 10 is created.
  • the first line spacing 11 is the spacing of the center points of the individual engraved sections in the respective micro-corrugated layer 3, 8.
  • the first line spacing 11 of the laser beam can be larger than for the other engraving layers 4, 5, 6, 7 for engraving the micro-corrugation 9, 10, whereby the micro-corrugation 9, 10 can be produced particularly easily.
  • the first line spacing 11 of the laser beam is selected to be the same size as in the other engraving layers 4, 5, 6, 7 and the diameter of the laser is changed.
  • the diameter of the laser beam can be selected to be larger than for the other engraving layers 4, 5, 6, 7 for engraving the micro-corrugation 9, 10.
  • the first line spacing 11 can be adjusted accordingly.
  • the diameter of the laser beam is selected to be smaller than that of the other engraving layers 4, 5, 6, 7.
  • the diameter of the laser beam is selected to be the same size as for the other engraving layers 4, 5, 6, 7 and the laser power and / or the first line spacing 11 are adapted.
  • the at least one engraving layer 4, 5, 6, 7 is produced by engraving essentially parallel lines with a predetermined second line spacing 12, and that the second line spacing 12 is smaller than the first line spacing 11.
  • the second line spacing 12 is kept constant.
  • the first line spacing 11 is kept constant.
  • the second line spacing 12 corresponds to approximately half the laser diameter, so that the superimposition of the individual removal profiles creates a smooth surface, as exemplified in FIG Fig. 6 is shown.
  • An overlay of individual Gaussian profiles or a laser engraving path is exemplified in Fig. 5 shown.
  • the laser diameter can preferably be 15 ⁇ m to 40 ⁇ m, in particular 18 ⁇ m to 38 ⁇ m, particularly preferably 20 ⁇ m to 35 ⁇ m.
  • the distance between the engraved sections can preferably be 10 ⁇ m, as a result of which the ratio of the distance to the laser diameter is 0.5 to approximately 0.33.
  • the distance between the engraved sections is particularly preferably increased, in particular with the same laser power, so that the individual removal profiles overlap less.
  • the ratio of distance to diameter is increased accordingly, which is exemplified in the Figures 7 and 8 is illustrated.
  • the ratio of the distance between the engraving routes to the laser diameter can be preferably at least 0.75, in particular at least 1, particularly preferably at least 1.5.
  • the height of the micro-corrugation 9, 10 is assumed to be the difference between the highest and lowest points of the micro-corrugation 9, 10, accordingly the difference between elevations and depressions within the micro-corrugation 9, 10.
  • the height of the micro-corrugation 9, 10 is determined on the one hand by the laser power and on the other hand determined by the distance between the engraving lines.
  • micro-corrugation layers 3, 8 are engraved several times.
  • the same micro-corrugation layer 3, 8 for the micro-corrugation 9, 10 is already engraved into the existing micro-corrugation 9, 10, whereby the height of the micro-corrugation 9, 10 can be increased.
  • the depth profile 2 is provided with the micro-corrugation 9, 10.
  • the entire depth profile 2 is provided with micro-corrugation 9, 10, which further increases the quality of the intaglio intaglio printing.
  • the micro-corrugation 9, 10 is engraved last.
  • the micro-corrugation 9, 10 is not impaired by the engraving of later engraving layers 4, 5, 6, 7.
  • an engraving layer 4, 5, 6, 7 is assigned to each depth on the basis of the depth profile 2 to be engraved, the Engraving layer is engraved a first depth after the engraving layer of a second depth, the second depth being deeper than the first depth.
  • the sequence of the engraving layers 4, 5, 6, 7 can particularly preferably be selected such that the engraving layers 4, 5, 6, 7 are engraved in descending order according to their depth. It is advantageous here that when the sequence of engraving layers 4, 5, 6, 7 is reversed, the step effect is reduced, since the last layer is the widest and thus at least slightly overlaps previous layers. With such a reversal, the micro-corrugation 9, 10 can be produced particularly easily.
  • the depth of an engraving layer 4, 5, 6, 7 is seen here from the side of the intaglio intaglio printing plate 1 to be engraved.
  • Fig. 1 the engraving layers 4, 5, 6 and the micro-corrugation layer 3 for generating a depth profile 2 of a first embodiment are shown by way of example.
  • the target depth profile 16 is shown by the solid line.
  • the planes of the engraving layers 4, 5, 6 and the micro-corrugation layer 3 are represented by dashed or dotted lines.
  • the size of the area of the individual levels within the target depth profile 16 also represents the size of the respective engraving layers 4, 5, 6 or micro-corrugation layer 3.
  • the third engraving layer 6 represents the deepest engraving layer.
  • the second engraving layer 5 is that engraving layer which is arranged over the third engraving layer 6.
  • the first engraving layer 4 is that engraving layer which is arranged above the second engraving layer 5 and accordingly has a smaller depth than the engraving layer 5.
  • the micro-corrugation layer 3 is that engraving layer by means of which the micro-corrugation 9 is produced.
  • first the third engraving layer 6, then the second engraving layer 5, then the first engraving layer 4 and finally the micro-corrugation layer 3 are engraved.
  • the step effect can be reduced and the micro-corrugation 9 can be clearly formed.
  • Fig. 2 is a depth profile 2 with a micro-corrugation 9, shown by way of example, which by means of the sequence of the engraving layers 4, 5, 6 according to Fig. 1 was generated.
  • Fig. 3 the engraving layers 4, 5, 6, 7 and several micro-corrugation layers 3, 8 for generating a depth profile 2 of a second preferred embodiment are shown by way of example.
  • an additional fourth engraving layer 7 which is deeper than the third engraving layer 6, as well as two different micro-corrugation layers 3, 8, a first micro-corrugation layer 3 and a second micro-corrugation layer 8.
  • the first micro-corrugation layer 3 is included larger than the second micro-corrugated layer 8.
  • the depth profile 2 resulting from these engraving layers 4, 5, 6, 7 and micro-corrugation layers 3, 8 is exemplified in FIG Fig. 4 pictured. Because of the two different micro-corrugation layers 3, 8, two different micro-corrugations 9, 10 were also produced. The first micro-corrugation 9 was produced only by the first micro-corrugation layer 3. The second micro-corrugation 10 was engraved by both micro-corrugation layers 3, 8 and is therefore more pronounced than the first micro-corrugation 9.
  • An intaglio intaglio printing plate 1 usually already has a predetermined wiping direction during its planning and manufacture.
  • the wiping direction is that direction in which the intaglio intaglio printing plate 1 is wiped off, in particular with a squeegee, after the intaglio printing ink has been applied.
  • the head and foot of the intaglio intaglio printing plate 1 are specified, the wiping direction running along this direction.
  • micro-corrugation 9, 10 is not engraved parallel to the predetermined wiping direction. This results in good color retention.
  • the micro-corrugation 9, 10 is engraved at an angle to the predetermined wiping direction.
  • the micro-corrugation 9, 10 therefore preferably does not run perpendicular to the wiping direction either.
  • the micro-corrugation 9, 10 extends in an angular range to the wiping direction of at least 45 °.
  • micro-corrugation 9, 10 in one
  • Angular range to the wiping direction of a maximum of 87 °.
  • the intaglio intaglio printing plate 1 is set to a predeterminable electrical potential before the wiping step and is kept at the electrical potential during the wiping step, which is exemplified in FIG Fig. 11 is shown.
  • the intaglio intaglio printing plate 1 is set to a negative potential V-.
  • Dipole-like pigments, the dipole of which is in the Fig. 11 are indicated by +/-, are therefore more firmly attached to the micro-corrugation 9, 10 of the intaglio intaglio printing plate 1 and pushed or removed less strongly from the depth profile 2 during the wiping step than pigments marked with n and other color components.
  • the intaglio printing ink contains color pigments which either have a permanent dipole moment or in which a dipole moment can be induced by an electrostatic field.
  • the intaglio intaglio printing plate 1 is preferably made of metal and is set to an electrical potential V- before or after the paint application step, but in any case before the wiping step.
  • the pigment dipoles align themselves in the resulting electrostatic field and are attracted to the intaglio intaglio printing plate 1.
  • increased ink retention on the intaglio intaglio printing plate 1 is achieved during the wiping step.
  • the advantage here is that the multitoneality of intaglio printing can be controlled simply via the electrostatic properties of the pigments. It can this creates a local variation of the color tone and dynamic effects can also be created.
  • the intaglio intaglio printing plate 1 is magnetized by means of a predeterminable external magnetic field before the wiping step.
  • the intaglio intaglio printing plate 1 contains color pigments with hard or soft magnetic properties.
  • the intaglio intaglio printing plate 1 consists in particular of a metal with ferromagnetic properties and is magnetized by an external magnetic field before the wiping step.
  • the color pigments are magnetostatically attracted to the intaglio intaglio printing plate 1 and are therefore less easily removed during the wiping step.
  • a locally higher field strength is achieved at the tips of the micro-corrugation 9, 10, as a result of which the attraction, in particular on the tips of the micro-corrugation 9, 10, is higher than on the planum of the intaglio intaglio printing plate 1.
  • the magnetic field of the intaglio intaglio printing plate 1 is reset in order to facilitate the transfer of ink from the intaglio intaglio printing plate 1 to the object to be printed.
  • the advantage here is that the multitoneality of intaglio printing can be controlled simply via the magnetostatic properties of the pigments. As a result, a local variation of the hue can be generated and, furthermore, dynamic effects can also be generated.
  • the electric and / or magnetic field is not reset before the printing process, that is, no grounding is applied or no demagnetization is carried out.
  • the dipole pigments are during the The printing process is oriented according to the direction of the field. If pigments are used which have a different color impression depending on their orientation, a local variation of the color shade can be achieved.
  • the intaglio printing ink is not a powder ground to a uniform size, but rather has pigments of different shapes and sizes.
  • a multitone print image 13 is shown by way of example, a intaglio printing ink with two different pigments of different sizes being used.
  • the Fig. 10 shows an example of an arrangement of pigments of different sizes in a depth profile 2 of an intaglio intaglio printing plate 1.
  • Large pigments 14 can be retained particularly well in a partial area with deeply formed micro-corrugations 10.
  • higher concentrations of small pigments 15 with isolated large pigments 14 can also be arranged in a further sub-area. This creates a multitoneality in the finished print image, which can be influenced in a targeted manner by means of one or more micro-corrugations 9, 10.
  • the large pigments 14 can be, for example, pigments of a first color and the small pigments 15, for example, pigments of a second color.
  • micro-corrugations 9, 10 with different heights can preferably be engraved.
  • the shape, in particular the height of a micro-corrugation 9, 10 and the distance between the individual corrugations can be adapted essentially to the size of a pigment.
  • micro-corrugations 9, 10 with different heights are arranged next to one another.
  • dynamic effects can be generated when using pigment flakes with a color variation via thin-layer interference.
  • the different pigments can be retained particularly well during the wiping step by means of one or more specifically selected micro-corrugations 9, 10 adapted to the shape and size of the pigments in different areas of the depth profile 2 of the intaglio intaglio printing plate 1.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Printing Methods (AREA)
  • Printing Plates And Materials Therefor (AREA)
EP21178571.2A 2020-06-18 2021-06-09 Procédé de gravure d'une plaque d'impression en creux Pending EP3928982A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ATA50518/2020A AT523951B1 (de) 2020-06-18 2020-06-18 Verfahren zum gravieren einer intaglio-stichtiefdruckplatte

Publications (1)

Publication Number Publication Date
EP3928982A1 true EP3928982A1 (fr) 2021-12-29

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EP21178571.2A Pending EP3928982A1 (fr) 2020-06-18 2021-06-09 Procédé de gravure d'une plaque d'impression en creux

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AT (1) AT523951B1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19624131A1 (de) * 1996-06-17 1997-12-18 Giesecke & Devrient Gmbh Verfahren zur Herstellung von Prägeplatten
DE19845440A1 (de) * 1998-10-02 2000-04-06 Giesecke & Devrient Gmbh Stichtiefdruckverfahren zum vollflächigen Bedrucken großer Flächen
EP1393925A1 (fr) * 2002-09-02 2004-03-03 Kba-Giori S.A. Plaque d'impression taille-douce

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ539221A (en) * 2002-10-07 2007-06-29 Note Printing Au Ltd Embossed optically variable devices
EP2441593B1 (fr) * 2010-10-13 2020-04-15 Hueck Folien Gesellschaft m.b.H. Élément de sécurité disposant de caractéristiques achromatiques
DE102012006558B4 (de) * 2012-04-02 2019-09-12 Hell Gravure Systems Gmbh & Co. Kg Verfahren zur Herstellung einer Flexodruckform

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19624131A1 (de) * 1996-06-17 1997-12-18 Giesecke & Devrient Gmbh Verfahren zur Herstellung von Prägeplatten
DE19845440A1 (de) * 1998-10-02 2000-04-06 Giesecke & Devrient Gmbh Stichtiefdruckverfahren zum vollflächigen Bedrucken großer Flächen
EP1393925A1 (fr) * 2002-09-02 2004-03-03 Kba-Giori S.A. Plaque d'impression taille-douce

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AT523951A1 (de) 2022-01-15
AT523951B1 (de) 2023-03-15

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