Classifications

• • 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
• • 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
• • 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
  • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
  • B42D25/29—Securities; Bank notes
• • 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
  • B42D25/40—Manufacture
  • B42D25/405—Marking
  • B42D25/43—Marking by removal of material
  • B42D25/435—Marking by removal of material using electromagnetic radiation, e.g. laser
• • 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
  • B42D25/40—Manufacture
  • B42D25/405—Marking
  • B42D25/43—Marking by removal of material
  • B42D25/445—Marking by removal of material using chemical means, e.g. etching
• • 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
• • B42D2035/26—

Definitions

• the invention relates to a data carrier with a half-tone image produced in intaglio printing, which has printed partial areas with specific tonal values, wherein at least three printed partial areas have different tonal values.
• the invention further relates to a gravure printing plate and a gravure printing method for printing halftone images having three or more different tonal values, and to a method for producing such intaglio printing plate.
• Data carriers in the sense of the present invention are, in particular, security or value documents, such as banknotes, passports, identity documents, check forms, shares, certificates, stamps, vouchers, airline tickets and the like, as well as labels, seals, packaging and other elements for product assurance.
• security or value documents such as banknotes, passports, identity documents, check forms, shares, certificates, stamps, vouchers, airline tickets and the like, as well as labels, seals, packaging and other elements for product assurance.
• data carrier in the following includes all such documents and product securing means.
• Security and value documents whose commercial value or utility value far exceeds the material value are usually identified by suitable measures as genuine and distinguishable from counterfeits and counterfeits. They are usually provided with special security elements that are ideally not or only with great effort imitable and not falsified.
• the line or intaglio printing technique has for the printing of data carriers, in particular of securities, such as banknotes and the like, a great importance.
• Intaglio printing is characterized by the fact that linear depressions are introduced into the printing plates in order to produce a printed image.
• the ink transferring areas of the printing plate are thus present as depressions in the printing plate surface.
• These depressions are produced by means of a suitable engraving tool or by etching.
• a wider line is produced with increasing stitch depth due to the conventionally tapered engraving tools.
• the ink receptivity of the engraved line, and hence the opacity of the printed line increases with increasing stitch depth.
• the non-printing areas of the printing plate are covered with a chemically inert lacquer.
• the engraving is produced in the exposed plate surface, the depth of the engraving lines depending in particular on the etching time.
• a paste of pasty consistency is applied to the engraved printing plate and the excess printing ink is removed from the surface of the printing plate by means of a doctor blade or a wiping cylinder, so that the ink is returned only in the depressions. remains.
• a substrate usually paper
• the thickness of the paint application determines the color tone.
• a white data carrier with low ink layer thicknesses a light color tone is obtained, while when printing with thick color layers, darker color tones are obtained.
• the ink layer thickness in turn depends to some extent on the engraving depth.
• TheTECHnstichtief printing technology allows in comparison to other common printing techniques, such as offset printing, a relatively thick paint on a disk.
• the comparatively thick ink layer produced in the line intaglio printing process, together with the partial deformation of the paper surface resulting from the press-in of the paper into the engraving of the printing plate, can easily be felt manually even by the layman and can thus easily be recognized as an authenticity feature by virtue of its tactility.
• the tactility is not imitated with a copier, so that the technicallynstichtief printing technology provides high-quality protection against counterfeiting.
• document WO 03/052702 A2 has proposed to provide a data carrier with a continuous tone image produced in intaglio printing, which comprises printed subareas directly adjoining one another in at least one subarea of the image, the subareas having specific tonal values and at least a portion of the image is tactile perceptible.
• halftone image refers to an image that has intermediate tones between the brightest and darkest image locations, and is a value under "tone value" as usual to understand on a gray scale from white to black.
• the present invention relates not only to black and white halftone images containing the achromatic colors, namely, white, black and gray, but also to monochrome or multicolor halftone images comprising the so-called bright colors.
• tone value is understood to mean the brightness of the color under consideration.
• WO 03/052702 A2 subdivides a template, such as a portrait, into halftone-related partial areas and the individual tonal values or groups of tonal values, matched to the printing ink used, different engraving depths for the printing plate to be produced assigned.
• the tonal values of the original are converted into corresponding engraving depths on the printing plate, whereby the engraving depth necessary for the generation of a special tonal value can vary from printing ink to printing ink.
• the object of the invention is to create a data carrier with increased security against counterfeiting, which has a half-tone image produced by intaglio printing with a large number of available halftone values.
• one or more of the different tonal values are formed by printed partial areas appearing over the entire surface of the naked eye with a certain proportion of unprinted white areas.
• white areas By using such white areas, the number of available halftone values can be significantly increased and at the same time a targeted halftone control can be achieved.
• the use of three different engraving depths by the use of different sized white parts easily eight different tonal values can be realized, which already allow an extremely realistic representation of halftone images, such as portraits.
• the use of the white areas according to the invention leads to a stabilization of the hue of the printed partial areas, which is particularly advantageous when using poorly translucent printing inks.
• the unprinted white areas of at least one of the different tonal values are formed by a family of parallel white lines.
• the unprinted white areas of at least one of the different tonal values are formed by a regular cross grid.
• the white areas result, for example, from the diamond-shaped intermediate spaces remaining between two intersecting groups of parallel printing lines.
• the unprinted white areas of at least one of the different tone values form hidden information, such as a pattern or a string.
• At least one of the printed sub-areas of the halftone image is tactually perceptible or contains a tactile perceptible structural element and thereby provides effective protection against counterfeiting, e.g. by copying.
• the extent of the unprinted white areas is less than 100 ⁇ m, preferably less than 80 ⁇ m, particularly preferably less than 60 ⁇ m, even more preferably less than 40 ⁇ m and particularly preferably less than 20 ⁇ m, in at least one dimension.
• the white areas for example, lines with a width less than 100 microns (or less than 80 microns or 60 microns or 40 microns or 20 microns) or by surface areas of any shape with an areal extent of less than 100 microns x 100 microns (or less than 80 microns x 80 microns or 60 microns x 60 microns or 40 microns x 40 microns or 20 microns x 20 microns) may be formed.
• At least six, for example eight, printed partial areas have different tonal values which are each formed by printed partial areas which appear to be full-surface to the naked eye and have a certain proportion of unprinted white areas.
• the partial areas of the halftone image can be derived, in particular, from a grid superimposed on a halftone image template, as described in international application WO 03/052702.
• the halftone image, as described in WO 03/052702 have additional tactile structural elements, or be superimposed at least in subareas with fine structures that affect its visual appearance and have a different orientation in individual sub-areas.
• WO 03/052702 also describes various possibilities for converting a halftone original into a intaglio printing image, which can likewise be used in the present invention. With regard to the objects mentioned, the disclosure of WO 03/052702 is incorporated by reference into the present application.
• the invention further includes a gravure printing plate for printing a halftone image having at least three differently engraved areas in the printing plate surface which serve to print different tonal values.
• a gravure printing plate for printing a halftone image having at least three differently engraved areas in the printing plate surface which serve to print different tonal values.
• One or more of the at least three engraved areas in this case have a certain proportion of non-printing white areas which are formed by surfaces lying at the level of the printing plate surface and whose extent lies at least in one dimension below the resolution limit of the naked eye.
• the non-printing white areas of at least one of the engraved areas of such a printing plate can result from a family of parallel engraving lines whose spacing is greater than the line width of the engraving lines. At a distance, not the non-printing intermediate space between the engraving lines, but the distance, for example, from the left flank of an engraving line to the left flank of the next engraving line.
• the non-printing white areas of at least one of the engraved areas can also result from two sets of parallel engraving lines crossing each other at an angle.
• the spacing of the engraving lines within each family is greater here than the line width of the engraving lines, resulting in diamond-shaped white areas.
• the two coulters advantageously intersect at an angle which is between 40 ° and 80 °, preferably between 50 ° and 70 °, for example about 60 °.
• the engraving lines of the intaglio printing plate or the printed lines preferably have a width of less than 60 ⁇ m, particularly preferably less than 50 ⁇ m, particularly preferably less than 30 ⁇ m.
• the non-printing white areas of at least one of the engraved areas form hidden information, such as a pattern or a string, in order to further increase the security of the generated halftone images.
• the hidden information can be present as positive or negative information and can also be provided only in a partial area of the halftone image.
• the areas of the white areas lying at the level of the printing plate surface continue with a flank angle ⁇ into the depth of the printing plate, which lies between 15 ° and 60 °, preferably between 30 ° and 50 °, in each case based on the surface normal of the printing plate.
• At least one of the engraved areas advantageously has a base area with a basic roughness pattern, as can be produced, for example, according to the method described in the document WO 97/48555.
• the invention also includes a method for producing a gravure printing plate for printing a halftone image having three or more different tone values, comprising the steps of:
• Engraving at least three different areas in the printing plate leaving in one or more of the three areas a certain amount of non-printing white areas formed by surfaces lying at the printing plate surface, the extent of which is at least one dimension below the resolution limit of the naked eye lies.
• the lying at the level of the printing plate surface areas of the white areas are advantageously formed so that they extend with a flank angle ⁇ in the depth of the printing plate, which is between 15 ° and 60 °, preferably between 30 ° and 50 °, based on the surface normal Pressure plate, lies.
• a flank angle ⁇ in the depth of the printing plate, which is between 15 ° and 60 °, preferably between 30 ° and 50 °, based on the surface normal Pressure plate, lies.
• an engraving tool with a corresponding flank angle ⁇ is expediently used.
• the intaglio printing plates according to the invention are preferably produced by engraving with a stylus, particularly preferably with a rapidly rotating, conically tapering stylus, as described in the document WO 97/48555.
• This allows particularly colorful, so for example, monochrome blue or red tone images with bright, intense colors produced "are pointing in different tonal no signs of gray or brown admixtures.
• the engravings can also laser engrave o- etching or any other suitable ablation process.
• intaglio printing technology in particular the deep steel gravure printing technology for the halftone images according to the invention, a characteristic printing and embossing image, which is easily recognizable even to laymen, is obtained, which can not be readjusted with other common printing processes.
• the intaglio printing technique and the innovation disclosed here are therefore particularly suitable for the printing of valuable or security-relevant data carriers, such as security or value documents, which have to meet the high requirements with regard to the protection against counterfeiting.
• Fig. 1 is a schematic representation of a banknote with an im
• FIG. 2 shows a section of the banknote of FIG. 1 in the region of the half-tone image in cross-section, FIG.
• FIG. 3 shows a corresponding section of the profile of the intaglio printing device used to produce the halftone image of FIG. plate, also according to an embodiment of the invention.
• Fig. 4 in (a) to (e) different views on printed according to the invention faces of a data carrier when viewed with a magnifying glass or a microscope.
• Fig. 1 shows a banknote 10, which is provided with a half-tone image 12 produced by intaglio printing, which is shown schematically in the figure as a black and white portrait.
• the entire printed image of the banknote consists of a superposition of a plurality of printed images, which are produced with different printing methods.
• a further graphic motif 14 can also be designed as a intaglio half tone image according to the invention. In the latter case, the portrait 12 can also be produced with conventional intaglio printing.
• the banknote 10 may contain a pattern 16 produced by offset printing, for example a guilloche pattern of regularly interwoven lines or another finely structured pattern, and a serial number 18 printed by letterpress. Areas created by screen printing or other printing methods may also be provided ,
• Fig. 2 shows for illustrative purposes a section of the banknote 10 in the area of the intaglio printing halftone image 12 in cross section.
• the detail shown shows the banknote paper 20 deformed during the printing process by the contact pressure, which has recesses 22 on the banknotes back and elevations 24 on the front of the banknotes.
• the elevations 24 are each covered with ink layers 36 and 38, which were taken during the printing process from the engraved areas 46 and 48 (FIG. 3) of the printing plate 40.
• the first printed sub-area 26 is covered with a color layer 36 of a certain color layer thickness D and appears within the halftone image 12 in a first tone value, which is determined by the nature of the ink used and the banknote paper.
• the second printed partial surface 28 is covered with a color layer 38 which has the same thickness D as the color layer 36 of the first partial surface 26.
• the printed image of the second subarea 28 is formed with a certain proportion of unprinted white areas W.
• the extent of the white areas W is at least in one dimension below the resolution limit of the naked eye, so that they can not be resolved without aids.
• the second printed partial surface 28 therefore appears to the naked eye as a uniform, fully printed area. However, due to the presence of white, it appears within the halftone image 12 despite the same color layer thickness D in a second tone, which is lighter than the first tone of the sub-area 26.
• FIG. 3 shows the detail of the profile of the associated intaglio printing plate 40 corresponding to the depiction in FIG. 2.
• a first engraving area 46 and a second engraving area 48 each having the same engraving depth T. While the first engraving area 46 is formed continuously and thus leads to a continuous ink layer 36 during printing, the second engraving area 48 is provided with webs 50 extending to the printing plate surface 42 whose surfaces 52 lying at the level of the printing plate surface form non-printing white areas.
• the webs 50 continue from the lying on the surface 42 of the pressure plate surfaces 52 with a flank angle ⁇ in the depth of the pressure plate, which is essentially given by the engraving tool used.
• the engraving areas of the intaglio printing plate 40 are engraved with a rotating stylus whose flank angle corresponds to the flank angle of the webs 50 to be generated.
• the engraving tool can be guided along different paths for the different partial areas.
• 4 shows in (a) to (e) some exemplary embodiments thereof.
• a plan view of a uniformly printed partial area of a of a data carrier as it shows when viewed with a magnifying glass or a microscope.
• FIG. 4 (a) shows a first cutout 60 in which the associated engraved printing plate contains a family of parallel engraving lines whose spacing is greater than the line width of the engraving lines.
• the associated engraved printing plate contains a family of parallel engraving lines whose spacing is greater than the line width of the engraving lines.
• approximately 30 .mu.m wide engraving lines were produced with a spacing of 60 .mu.m.
• the engraving lines of the printing plate do not necessarily have to be rectilinear, as illustrated in the section 80 shown in FIG. 4 (c), which shows two intersecting, curved lines of lines 82 and white areas 84 enclosed therein.
• the white areas may also represent hidden information, such as a pattern or a string / which is recognizable only when magnified accordingly.
• the cutouts 90 and 94 of Figures 4 (d) and (e) show simple variants of such designs in which the white areas in the form of the letter "D" indicate positive information (reference numeral 92, Figure 4 (d)) or 4 (e)) .Different tonal values can also be set here by the line width of the engraving lines and / or the spacing of the individual information elements (in this case the letter "D"). Of course, even more complex information can be introduced in this way in the printed image.

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• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Physics & Mathematics (AREA)
• Health & Medical Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Finance (AREA)
• Accounting & Taxation (AREA)
• Business, Economics & Management (AREA)
• Chemical & Material Sciences (AREA)
• Electromagnetism (AREA)
• General Health & Medical Sciences (AREA)
• Optics & Photonics (AREA)
• Toxicology (AREA)
• Printing Methods (AREA)
• Manufacture Or Reproduction Of Printing Formes (AREA)
• Holo Graphy (AREA)

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Publications (2)

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• 2005
  • 2005-02-21 DE DE102005008135A patent/DE102005008135A1/de not_active Withdrawn
• 2006
  • 2006-02-09 CN CN200680004208A patent/CN100579796C/zh not_active Expired - Fee Related
  • 2006-02-09 ES ES06706763T patent/ES2312113T3/es active Active
  • 2006-02-09 CA CA2594780A patent/CA2594780C/fr not_active Expired - Fee Related
  • 2006-02-09 DE DE502006001280T patent/DE502006001280D1/de active Active
  • 2006-02-09 WO PCT/EP2006/001123 patent/WO2006087129A2/fr active IP Right Grant
  • 2006-02-09 AT AT06706763T patent/ATE403554T1/de active
  • 2006-02-09 RU RU2007134309/12A patent/RU2392125C2/ru not_active IP Right Cessation
  • 2006-02-09 EP EP06706763A patent/EP1853433B1/fr not_active Revoked
  • 2006-02-16 MY MYPI20060661A patent/MY146523A/en unknown

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