EP1119457B2 - Plaque et procede d'heliogravure destines a l'impression complete de grandes surfaces - Google Patents

Plaque et procede d'heliogravure destines a l'impression complete de grandes surfaces Download PDF

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Publication number
EP1119457B2
EP1119457B2 EP99947434.9A EP99947434A EP1119457B2 EP 1119457 B2 EP1119457 B2 EP 1119457B2 EP 99947434 A EP99947434 A EP 99947434A EP 1119457 B2 EP1119457 B2 EP 1119457B2
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EP
European Patent Office
Prior art keywords
engraved
printing plate
partitions
engraving
area
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.)
Expired - Lifetime
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EP99947434.9A
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German (de)
English (en)
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EP1119457A1 (fr
EP1119457B1 (fr
Inventor
Karlheinz Mayer
Reinhard Plaschka
Johann Müller
Peter Franz
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Giesecke and Devrient GmbH
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Giesecke and Devrient GmbH
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Application filed by Giesecke and Devrient GmbH filed Critical Giesecke and Devrient GmbH
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Classifications

    • 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
    • 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
    • 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
    • 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
    • B42D2033/18—
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]

Definitions

  • the invention relates to a printing plate for full-surface printing of large areas in intaglio printing, a process for the preparation of the printing plate and a method for producing a data carrier with a large-scale printed image produced by intaglio printing.
  • the engraving lines of the printing plate are filled with paint.
  • the excess ink is removed from the printing plate with the help of a wiping cylinder or a doctor blade so that the engraving lines are filled to the brim with color.
  • the separating webs provided between the engraving lines are cleaned in this operation.
  • the printing medium which is usually paper
  • the printing plate is finally pressed onto the printing plate with high pressure by means of a pressure cylinder having an elastic surface.
  • the disk is thereby pressed into the filled with color engraving lines of the printing plate and thus comes into contact with the ink. When removing the disk, this pulls the ink out of the recesses of the engraving lines.
  • the printed image produced in this way has printing lines which vary depending on the depth of the engraving in the ink layer thickness.
  • lithographic printing inks are used in intaglio printing, then when printing on a white data carrier with low ink layer thicknesses, bright shades are obtained, while when printing with thick layers of ink, darker shades are obtained.
  • the intaglio printing process can produce print images with very large ink layer thicknesses.
  • the resulting printed images are even manually felt when using correspondingly deep engravings.
  • correspondingly fine engravings in contrast, extremely fine, pin sharp printing lines are also possible.
  • Object of the present invention is therefore to provide measures that allow large-scale print image areas in the intaglio printing process over the entire area to print so that the viewer is a uniform color impression is generated.
  • the invention is based on the recognition that when wiping the printing cylinder or the printing plate disturbing wiping of ink from the field of engraving can be prevented if so-called dividers are provided in the engraving, the action of the wiping cylinder on the engraving Prevent the printing plate introduced ink or keep it as low as possible. It is presumed that the wave of excess pressure ink which has been pushed out of the wiping cylinder by the wiping cylinder over the surface of the printing plate also pulls out portions of color from the engraving due to hydrodynamic effects.
  • the dividers apparently prevent the ink located in the engraving moves in the total volume and is pulled along with the color of the wiper cylinder.
  • the dividers thus subdivide a larger area engraving in adjacent "chambers" or channels, although allow during printing printing removal of the ink perpendicular to the printing plate surface, but not during the wiping process parallel to the printing plate surface.
  • the dividers are preferably arranged transversely to the direction of rotation of the printing cylinder. In this arrangement, during the wiping process, they apparently cause a shearing off of the ink fountain and thus a hydrodynamic decoupling of the ink in the engraving from the wiping process taking place on the printing plate surface.
  • the separating webs effect at least a subdivision of the large-area engravings and give them a functionality which is similar with respect to the wiping of paint, as exists in finely structured engravings.
  • the engraving areas are preferably to be equipped with separating webs transversely to the wiping direction.
  • separating webs transversely to the wiping direction. For engraving lines that run along the wiping direction, this results in a subdivision of the engraving lines in juxtaposed subsections.
  • the engraving extending transversely or diagonally to the wiping direction is subdivided at least in the longitudinal direction of the engraving line, wherein the separating webs preferably extend parallel to the engraving edges.
  • the engraving consists not only of very wide engraving lines, but also contains large-scale engraving elements which have similar expansions in the x and y directions
  • the dividers in a grid shape, ie to provide intersecting dividers, which, for example, extend longitudinally and transversely with respect to the wiping direction. It is also possible to provide dividers in the form of concentric circles honeycomb or the like. Such a design of the dividers not only has the advantage that the function of the dividers is guaranteed regardless of the wiping direction in each case, it also ensures that the dividers receive increased mechanical stability.
  • the height of the dividers can, as experiments showed, be varied in a relatively wide range. If the dividing webs end at the level of the printing plate surface, it must be ensured that the dividing web form viewed in cross section tapers in a wedge shape. This ensures that on the one hand the subdivision of the engraving into separate channels or chambers takes place in an optimal form, on the other hand, however, the sharp-edged dividers have no interruption of the printing surface result.
  • the cross-sectional shape of the separating webs can deviate almost arbitrarily from the wedge shape, i. trapezoidal, rounded or otherwise designed, but only wedge-shaped tapered dividing web forms are patent. Since the upper edge of the separating webs is always arranged below the level of the printing plate surface in this case and thus always covered with ink, the generation of a continuous printing surface is ensured in each case.
  • the dividing webs insofar as they have a height, referred to below as the amplitude, of more than 50% in relation to the engraving depth produce "notches" in the ink layer surface on the printing surface produced therewith.
  • the printing surface produced with such a large-scale engraving is printed continuously with color, it thus has a surface relief, which originates from the separating webs.
  • the surface relief is particularly strong when the separation pad amplitude is selected in the range of 75% to 100% of the engraving depth. At lower amplitudes, e.g. in the range of about 60%, this surface relief becomes weaker and weaker until it finally disappears completely at an amplitude of about 50%. If the value falls below 50%, especially with deeper engravings, printing errors in the form of gaps or dropouts are increasingly likely to render printing useless.
  • engraving depths of 5 microns to about 150 microns are outstandingly useful in the invention.
  • Engraving with a depth in the range of about 60 microns to 100 microns are particularly suitable for printing color layers with a saturated, opaque color impression.
  • the exact values vary, depending on whether the color is light or dark.
  • Engravings with a depth of 100 microns and more are particularly suitable for the production of color layer structures with a well-perceived with the sense of touch relief.
  • the finer the fine structure of the printed surface represented by the surface relief the less it appears when viewed without tools (magnifying glass). This is true at least for fine structures that are due to dividers with a distance of about 20 microns to 150 microns and wedge-shaped dividing web shape. Dividers with a distance of 150 ⁇ m to approx. 400 ⁇ m are already recognizable with the unaided eye, but in no way disturb the overall impression of the printed color surface. If a trapezoidal cross-sectional profile is used instead of the wedge-shaped, tapered separating webs according to the invention, the notches present in the surface relief become wider, ie. scale. With such structures, a design influence on the surface to be printed is possible by e.g. the grid formed by the dividers also appears as a design element in appearance. If the dividers are not grid-like, but incorporated in the form of characters, icons or the like in the engraving and these characters or symbols in the printed area can be seen.
  • both a certain roughness (instead of a smooth surface) can be generated at the base of the engraving, as well as the separating webs according to the invention having any desired amplitude, flank angle or precisely predetermined cross-sectional shape. It is important, as already mentioned, that for the function according to the invention, the partitions should have a minimum amplitude of about 50% of the engraving depth. If this value falls well below the ink adheres to the bottom of the engraving better than smooth engraving reason, but with large-scale engraving elements, the printing errors mentioned above can not be avoided.
  • the fine structure of the printing surface can be present both in the form of a grid and in the form of written or pictorial symbols. Even if the coarsest fine structure (separation pitch in the order of 500 microns) is selected, this can be imitated by any known printing method, whereby the security against forgery of the corresponding printed data carriers is significantly increased.
  • the fine structure thus not only demonstrates the use of the inherently high-quality intaglio printing method, but also the use of the in the WO 97/48555 described engraving device that is due to high costs no counterfeiter available.
  • Fig. 1 shows a section of a printing plate 1, the surface 2 is provided with an engraving 3 predetermined depth t, which serves to receive ink.
  • the engravings shown in cross section are linear, perpendicular to the plane of the paper and are formed so that between the parallel grooves depressions 4 are present, the upper edge 5 is at the level of the printing plate surface 2.
  • the separating webs 4 prevent the ink from being removed from the depressions formed by the engraving 3 and, on the other hand, cause a structuring of the ink layer transferred to a substrate.
  • the substrate is printed area-wide with color in the area of the engraving.
  • the offset with which the parallel engraving 3 are generated corresponds to the distance d of Trennstegoberkanten 5.
  • the distance d is preferably in the range from 20 .mu.m to 150 .mu.m, with a spacing of approximately 50 .mu.m for the production of fine structure not recognizable without auxiliary means is particularly preferred.
  • the modulation of the ink layer thickness produced by the separating webs produces a fine structure in the printed ink layer which, under normal observation, is not resolved with the naked eye and can therefore serve as a hidden security feature that can not be reproduced either electrophotographically or with other printing processes.
  • the intensity of the color impression or the perceived hue depend on the average ink layer thickness and can be adjusted by the engraving depth t at a given flank angle ⁇ .
  • a printing plate is shown in cross-section, with a medium thinner ink layer can be printed, which produces a lighter hue.
  • the engraved areas of in Fig. 1 and 2 illustrated printing plates are the same size and the engravings 3 have the same flank angle ⁇ . Due to the in Fig. 2 lower engraving depth t is chosen a smaller distance d for the offset of the engraving lines.
  • the engraving depth t and the distance d of Trennstegoberkanten 5 are selected so that within a engraved area on the level of the printing plate surface 2 no flat plateaus.
  • Fig. 3 the engraved area has the same extent as in the examples of Fig. 1 and 2 ,
  • the engraving depth t is the same as in Fig. 1 ,
  • the separating webs 4 have a different flank angle ⁇ , one with a pressure plate according to FIG Fig. 3 transferred color layer on the same average layer thickness, as one with a printing plate according to Fig. 1 printed.
  • d of the dividers 5 are with the pressure plates of the Fig. 1 and 3 Surfaces printed in the same color.
  • the printing plates according to the FIGS. 2 and 3 On the other hand, they have the same separating web spacing d, thereby producing a fine structure of the same periodicity, but due to the different flank angles (.alpha., .beta.), lead to ink layers of different average thickness and different tints.
  • the engravings 3 are preferably produced with rotating styli whose point angle, measured to the center line of the stylus, corresponds to the flank angle of the engraving.
  • the flank angles are preferably in the range of 15 ° to 60 °, particularly preferred is the range of 30 ° to 50 °.
  • mechanical engraving tools have an increased service life.
  • Printing plates with the preferred flank angles are easier to duplicate by impression techniques and also have particularly favorable printing properties.
  • As a separating web shape (cross section), wedge-shaped geometries are used. However, any other, in particular wave or sinusoidal geometries are conceivable, but only wedge-shaped tapered dividing web forms are according to the patent.
  • the shape of the cross section of the partitions 4 is limited only by the design possibilities of the contour of an engraving tool.
  • ink layer thickness is to be reduced in the transition region from one fine structure line to the adjacent one only to a value other than zero.
  • suitable structures are those described in US Pat 4 and 5 are shown.
  • a printing plate according to Fig. 4 is produced by removing the outwardly-facing ends of the dividers after engraving the recesses forming the fine-structure.
  • the entire area to be provided with an engraving can first be cleared away in the depth a and then the depressions forming the fine structure can be engraved.
  • the outwardly facing ends of the dividers are thereby lowered by the value a below the level of the printing plate surface 2.
  • the remaining height of the separating webs is referred to below as the amplitude b and results from the difference between the engraving depth t and separating web lowering a.
  • a printed with such a printing plate substrate is provided in the area of the engraving area-wide with a color layer of thickness a, which is additionally modulated with a fine structure of maximum amplitude b.
  • the plateau in this example formed upper ends of the dividers produce fine bright lines in the printed image.
  • a separating web lowering a can also be achieved by selecting the offset between the individual engraving lines to be so small at a given flank angle ⁇ and given engraving depth t that the separating web top edge 5 lies below the level of the printing plate surface 2.
  • a dividing web lowering is advantageous because the plastic surface of the wiping cylinder does not come into direct contact with the sharp-edged dividing webs 4 thereby reducing wear and tear on the wiping cylinder surface as well as on the fine engraved structures of the printing plate.
  • the separating web drop a is preferably 2 ⁇ m to 5 ⁇ m below the level of the printing plate surface 2.
  • the amplitude b should be more than 50% of the engraving depth t.
  • Fig. 6 shows a variant of the invention, supplemented with dividers engraving.
  • the partitions 4 are arranged at a greater distance d.
  • the separating web distance d here does not correspond to the offset of the engraving tool during the engraving of the depressions.
  • the distance d is less than 500 ⁇ m.
  • Between the dividers 4 horizontal bottom surfaces 6 of the engraving are provided, which have a specifically set surface roughness to improve the ink adhesion. The adjustment of the surface roughness is made by selecting the geometry of the point angle and tip radius of the engraving tool and by specifying suitable values for the offset between two engraving lines transverse to the engraving direction.
  • the engraving 3 is introduced into a printing plate surface 2 such that the engraving depth within the engraved surface is not constant, but continuously increases or decreases in one direction (FIGS. 7a, 7b).
  • the variation of the engraving depth is preferably such that the lowest points of each engraving line lie on a plane inclined to the printing plate surface. It is also possible to change the engraving depth so that the lowest points lying in a cross-sectional plane of the printing plate lie on a curved curve whose course can be described, for example, by a parabola hyperbola.
  • the gravure depth variation can be used to vary the perceived hue within a contiguously printed color area, in particular if the depth variation is between 5 ⁇ m and 60 ⁇ m.
  • Fig. 6a is the separation distance d and the height of the dividers throughout the engraving constant, while in the variant of FIG. 76b increase distance and height of the dividers with the engraving depth (d 1 > d 2 ).
  • the resulting engraving has a particularly good ink adhesion, which has a favorable effect on the printing properties of a corresponding engraved printing plate ,
  • the printed color layers also have a particularly uniform hue.
  • the first and the superimposed second engraving can be produced with engraving tools of different geometry as well as with different engraving depth and / or different engraving line offset. In the case of the preferred cross-grid, this leads to periodically interrupted dividers.

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  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Printing Methods (AREA)
  • Printing Plates And Materials Therefor (AREA)

Claims (68)

  1. Plaque (1) d'impression en taille-douce gravée ou héliogravure pour l'impression en plein format de zones d'image d'impression contiguës, dans laquelle l'image à imprimer est réalisée sous la forme d'une gravure (3) de la surface (2) de la plaque d'impression, caractérisée en ce que, dans les zones gravées, recevant de l'encre, sont prévues des nervures de séparation (4), les zones gravées se subdivisant en zones partielles, et en ce que les nervures de séparation (4) présentant une configuration telle qu'elles ne présentent aucune surface à la hauteur de la surface de la plaque d'impression, et le rapport (b: t) entre la hauteur des nervures de séparation (b) et la profondeur de gravure (t) est dans la plage de 0,5 à 1 de sorte que les nervures de séparation, vue en section transversale, ont une allure en pointe et se rejoignent selon une forme en coin.
  2. Plaque d'impression selon la revendication 1, caractérisée en ce que les zones gravées sont des lignes de gravure et/ou des éléments de gravure de grande surface.
  3. Plaque d'impression selon la revendication 2, caractérisée en ce que les lignes de gravure sont plus larges que 0,5 mm, de préférence plus larges que 1,0 mm.
  4. Plaque d'impression selon l'une des revendications 1 à 3, caractérisée en ce que les zones gravées sont des lignes de gravure et en ce que les nervures de séparation (4) s'étendent transversalement par rapport à la ligne de gravure, de sorte qu'il apparaisse des tronçons partiels mutuellement alignés en rangées, et en ce que les nervures de séparation (4) s'étendent transversalement ou en diagonale par rapport à la direction d'essuyage.
  5. Plaque d'impression selon l'une des revendications 1 à 3, caractérisée en ce que les zones gravées sont des lignes de gravure, et les nervures de séparation s'étendent parallèlement à la ligne de gravure et transversalement ou en diagonale par rapport à la direction d'essuyage.
  6. Plaque d'impression selon la revendication 1, caractérisé en ce que les nervures de séparation (4) sont disposées dans la zone de gravure de manière telle qu'elles forment une structure fine régulière sous la forme d'un réseau ou d'un modèle régulier.
  7. Plaque d'impression selon la revendication 6, caractérisée en ce que le réseau est un réseau de lignes ou de lignes croisées.
  8. Plaque d'impression selon la revendication 7, caractérisée en ce que le réseau à lignes croisées est composé d'une première gravure, ayant des lignes de gravures parallèles, de préférence rectilignes, et d'une deuxième gravure superposée à la première gravure, ayant des lignes de gravure parallèles, de préférence rectilignes.
  9. Plaque d'impression selon la revendication 8, caractérisée en ce que les lignes de la première et de la deuxième gravure forment entre elles un angle compris entre 20° et 90°, en particulier un angle de 40° à 70°.
  10. Plaque d'impression selon l'une des revendications 1 à 9, caractérisée en ce que les arêtes supérieures des nervures de séparation (4) sont disposées à une distance (d) mutuelle, supérieure ou égale à la largeur de creusement d'un outil de gravure utilisé pour graver la zone de gravure.
  11. Plaque d'impression selon l'une des revendications 1 à 10, caractérisée en ce que l'espacement (d) mutuel des arêtes supérieures (5) des nervures de séparation (4) est inférieur à 500 µm.
  12. Plaque d'impression selon la revendication 11, caractérisée en ce que l'espacement (d) mutuel des arêtes supérieures (5) des nervures de séparation (4) est de 20 µm à 150 µm.
  13. Plaque d'impression selon la revendication 12, caractérisée en ce que l'espacement (d) mutuel des arêtes supérieures (5) des nervures de séparation (4) est de 50 µm.
  14. Plaque d'impression selon l'une des revendications 1 à 13, caractérisée en ce que les arêtes supérieures (5) des nervures de séparation (4) présentent un décrochement en creux (a) d'au moins 2 µm à 5 µm par rapport à la surface supérieure (2) de la plaque d'impression.
  15. Plaque d'impression selon l'une des revendications 1 à 14, caractérisée en ce que les nervures de séparation (4) présentent une hauteur (b) de nervure de séparation comprise entre 3 µm et 150 µm.
  16. Plaque d'impression selon la revendication 15, caractérisée en ce que la hauteur (b) de nervure de séparation est dans la plage de 8 µm à 60 µm.
  17. Plaque d'impression selon l'une des revendications 1 à 16, caractérisée en ce que la profondeur de gravure (t) est comprise entre 5 µm et 150 µm.
  18. Plaque d'impression selon la revendication 17, caractérisée en ce que la profondeur de gravure (t) est comprise entre 10 µm et 60 µm.
  19. Plaque d'impression selon l'une des revendications 1 à 18, caractérisée en ce que les nervures de séparation (4) présentent des flancs ayant des angles de flanc (α) dans la plage de 15° à 60° par rapport aux verticales à la surface supérieure de la plaque d'impression (2).
  20. Plaque d'impression selon la revendication 19, caractérisée en ce que les nervures de séparation (4) présentent des flancs ayant des angles de flancs (α) dans la plage de 30° à 50°.
  21. Plaque d'impression selon l'une des revendications 1 à 20, caractérisée en ce que les nervures de séparation (4) forment, par un agencement parallèle, une structure fine à forme linéaire.
  22. Plaque d'impression selon la revendication 21, caractérisée en ce que la plaque d'impression (1) est apte à être utilisée avec un cylindre d'impression, de manière que la structure fine de forme linéaire soit sensiblement parallèle à l'axe de rotation du cylindre d'impression.
  23. Plaque d'impression selon l'une des revendications 1 à 22, caractérisée en ce que tant la longueur, qu'également la largeur de la zone de gravure est supérieure à 1 mm.
  24. Plaque d'impression selon l'une des revendications 1 à 23, caractérisée en ce que sont prévues au moins une première zone de gravure et une deuxième zone de gravure, se distinguant par la différence de configuration des nervures de séparation (4) et/ou de l'agencement des nervures de séparation.
  25. Plaque d'impression selon la revendication 24, caractérisée en ce que les nervures de séparation (4) situées dans la première zone de gravure présentent une autre orientation que les nervures de séparation (4) situées dans la deuxième zone de gravure.
  26. Plaque d'impression selon la revendication 25, caractérisée en ce que les nervures de séparation (4) situées dans la première zone de gravure sont orientées à angle droit par rapport aux nervures de séparation (4) situées dans la deuxième zone de gravure.
  27. Plaque d'impression selon l'une des revendications 24 à 26, caractérisée en ce que la première zone de gravure présente une profondeur de gravure (t) différente de celle de la deuxième zone de gravure.
  28. Plaque d'impression selon l'une des revendications 24 à 27, caractérisée en ce que les arêtes supérieures (5) des nervures de séparation situées dans la première zone de gravure présentent un espacement mutuel (d) supérieur à celui des arêtes supérieures (5) des nervures de séparation situées dans la deuxième zone de gravure.
  29. Plaque d'impression selon l'une des revendications 24 à 28, caractérisée en ce que les arêtes supérieures (5) des nervures de séparation situées dans la deuxième zone de gravure présentent, par rapport à la surface (2) de la plaque d'impression, un espacement (a) supérieur à celui des arêtes supérieures (5) des nervures de séparation situées dans la première zone de gravure.
  30. Plaque d'impression selon l'une des revendications 24 à 29, caractérisée en ce que la première et la deuxième zones de gravure se délimite mutuellement.
  31. Procédé de fabrication d'un support de données en utilisant une plaque (1) d'impression en taille-douce selon la revendication 1, avec une image d'impression générée par un procédé d'impression en taille-douce gravée ou héliogravure, comprenant au moins une zone d'image à imprimer présentant au moins une couche d'encre, avec une surface supérieure à 1 mm2, la couche d'encre recouvrant complètement la zone d'image d'impression, les dimensions latérales de la surface, telles que la longueur et la largeur, sont supérieures à 0,5 mm, et la couche d'encre présente selon une direction au moins une entaille sur laquelle l'épaisseur de couche d'encre passe par un minimum.
  32. Procédé selon la revendication 31, caractérisé en ce que les dimensions latérales de la surface, telles que la longueur et la largeur, sont supérieures à 1 mm.
  33. Procédé selon la revendication 31 ou 32, caractérisé par un relief de surface de la couche d'encre, le relief de surface présentant une structure fine avec des éléments de structure se répétant régulièrement.
  34. Procédé selon la revendication 33, caractérisé en ce que les éléments de structure se répètent à un espacement inférieur à 0,5 mm.
  35. Procédé selon la revendication 33 ou 34, caractérisé en ce que la structure fine forme un réseau ou un modèle régulier.
  36. Procédé selon la revendication 35, caractérisé en ce que le réseau est un réseau de lignes ou de lignes croisées.
  37. Procédé selon la revendication 35 ou 36, caractérisé en ce que la structure fine forme un réseau dans lequel la largeur de ligne est inférieure à 150 µM.
  38. Procédé selon l'une des revendications 33 à 37, caractérisé par au moins une première zone d'image d'impression, présentant une première structure fine, et une deuxième zone d'image d'impression, présentant une deuxième structure fine, différente de la première structure fine.
  39. Procédé selon la revendication 38, caractérisé en ce que la première et la deuxième zones d'image d'impression forment un ou plusieurs caractères d'écriture ou une image.
  40. Procédé selon la revendication 38 ou 39, caractérisé en ce que la structure fine de la première zone d'image d'impression présente une autre orientation que la structure fine de la deuxième zone d'image d'impression.
  41. Procédé selon la revendication 38 à 40, caractérisé en ce que les structures fines de la première et de la deuxième zones d'image d'impression de distinguent par des largeurs de ligne différentes.
  42. Procédé selon l'une des revendications 38 à 41, caractérisé en ce que la première et la deuxième zones d'image d'impression de distinguent par des épaisseurs de couche d'encre différentes.
  43. Procédé de fabrication d'une plaque (1) d'impression en taille douce gravée ou pour héliogravure pour l'impression en plein format d'une grande surface dans un procédé d'impression par héliogravure, comprenant les étapes consistant :
    - à mettre à disposition une plaque d'impression munie d'une surface de plaque d'impression (2), et
    - à graver au moins une zone de gravure correspondant à la grande surface à imprimer, dans la surface (2) de la plaque d'impression, avec un outil de gravure, de sorte que subsistent des nervures de séparation (4), qui ressortent dans la zone de gravure et subdivisent la zone de gravure en des zones partielles dans lequel le rapport (b : t) entre la hauteur (b) des nervures de séparation et la profondeur de gravure (t) est dans la plage de 0,5 à 1, et que les nervures de séparation (4), présentant, à la suite du processus de gravure, une conformation telle que, vue en section transversale, elles ont une allure en pointe et se rejoignent selon une forme en coin et ne comportent aucune surface à la hauteur de la surface (2) de la plaque d'impression.
  44. Procédé selon la revendication 44, caractérisé en ce que les zones gravées sont gravées sous forme de lignes de gravure et/ou d'éléments de gravure à grande surface.
  45. Procédé selon la revendication 45, caractérisé en ce que les lignes de gravure présentent une largeur supérieure à 0,5 mm, de préférence supérieure à 1,0 mm.
  46. Procédé selon l'une des revendications 44 à 46, caractérisé en ce que les zones gravées sont gravées sous la forme de lignes de gravure, et en ce que la nervure de séparation (4) est réalisée transversalement par rapport à la ligne de gravure, de sorte à faire apparaître des tronçons partiels mutuellement alignés, et en ce que les nervures de séparation s'étendent transversalement ou en diagonale par rapport à la direction d'essuyage.
  47. Procédé selon l'une des revendications 44 à 46, caractérisé en ce que les zones gravées sont gravées en tant que lignes de gravures, et en ce que les nervures de séparation sont réalisées parallèlement à la ligne de gravure et s'étendent transversalement ou en diagonale par rapport à la direction d'essuyage.
  48. Procédé selon la revendication 44, caractérisé en ce que les nervures de séparation (4) forment une structure fine régulière sous la forme d'un réseau ou d'un modèle régulier.
  49. Procédé selon la revendication 49, caractérisé en ce que le réseau est un réseau de lignes croisées, de points ou de lignes croisées.
  50. Procédé selon la revendication 50, caractérisé en ce que le réseau à lignes croisées est formé d'une première gravure ayant des lignes de gravure parallèles, de préférence rectilignes, et d'une deuxième gravure, superposée à la première gravure, ayant des lignes de gravure parallèles de préférence rectilignes.
  51. Procédé selon la revendication 51, caractérisé en ce que les lignes de la première et de la deuxième gravure forment entre elles un angle compris entre 20° et 90°, en particulier de 40° à 70°.
  52. Procédé selon l'une des revendications 44 à 50, caractérisé en ce que les nervures de séparation (4) sont générées avec des angles de flanc (α) dans la plage de 15° à 60° par rapport aux perpendiculaires à la surface (2) de la plaque d'impression.
  53. Procédé selon la revendication 53, caractérisé en ce que les nervures de séparation sont produites avec des angles de flanc (α) dans la plage de 30° à 50°.
  54. Procédé selon la revendication 53 ou 54, caractérisé en ce qu'on utilise pour la gravure un outil de gravure ayant un angle de flanc (α) correspondant.
  55. Procédé selon la revendication 55, caractérisé en ce qu'on utilise pour la gravure un burin de gravure pointu tournant pendant son déplacement.
  56. Procédé selon l'une des revendications 44 à 56, caractérisé en ce qu'une première gravure est gravée dans la surface (2) de la plaque d'impression, et en ce qu'une deuxième gravure voisine de la première gravure, est gravée dans la surface (2) de la plaque d'impression de manière qu'entre la première et la deuxième gravures, subsiste une nervure de séparation (4) à allure en pointe, située au niveau de la surface supérieure (2) de la plaque d'impression ou légèrement au-dessous.
  57. Procédé selon l'une des revendications 44 à 58, caractérisé en que l'espacement (d) maximal mutuel des nervures de séparation (4) est inférieur à 500 µm.
  58. Procédé selon la revendication 59, caractérisé en ce que l'espacement (d) maximal mutuel des nervures de séparation (4) est de 20 µm à 150 µm.
  59. Procédé selon l'une des revendications 44 à 60, caractérisé en ce qu'à l'intérieur d'une gravure, sont prévues des nervures de séparation (4) de hauteurs différentes.
  60. Procédé selon l'une des revendications 44 à 60, caractérisé en ce que la zone de gravure gravée en creux dans la surface (2) de la plaque d'impression présente une profondeur de gravure comprise entre 5 µm et 150 µ.
  61. Procédé selon la revendication 62, caractérisé en ce que la profondeur de gravure est comprise entre 10 µm et 60 µm.
  62. Procédé selon l'une des revendications 49 à 63, caractérisé en ce que les nervures de séparation (4) forment par agencement parallèle une structure fine en forme de lignes.
  63. Procédé selon l'une des revendications 49 à 64, caractérisé en ce que dans au moins une première zone de gravure est gravée en creux une première structure fine, et en ce que dans au moins une deuxième zone de gravure est gravée en creux une deuxième structure fine, différente de la première structure fine.
  64. Procédé selon la revendication 63, caractérisé en ce que les nervures de séparation (4) sont produites dans la première zone de gravure, avec une autre orientation que les nervures de séparation (4) produites dans la deuxième zone de gravure.
  65. Procédé selon la revendication 64, caractérisé en ce que les nervures de séparation (4) dans la première zone de gravure, sont orientées à angle droit par rapport aux nervures de séparation (4) situées dans la deuxième zone de gravure.
  66. Procédé selon l'une des revendications 63 à 65, caractérisé en ce que la première zone de gravure est gravée avec une autre profondeur de gravure (t) que la deuxième zone de gravure.
  67. Procédé selon l'une des revendications 63 à 66, caractérisé en ce les nervures de séparation (4) se trouvant dans la première zone de gravure sont à un espacement (d) maximal supérieur à l'espacement entre les nervures de séparation se trouvant dans la deuxième zone de gravure.
  68. Procédé selon l'une des revendications 63 à 67, caractérisé en ce les arêtes supérieures (5) des nervures de séparation (4) se trouvant dans la deuxième zone de gravure, sont produites avec un plus grand espacement (a) par rapport à la surface (2) de la plaque d'impression que les arêtes supérieures (5) des nervures de séparation se trouvant dans la première zone de gravure.
EP99947434.9A 1998-10-02 1999-09-29 Plaque et procede d'heliogravure destines a l'impression complete de grandes surfaces Expired - Lifetime EP1119457B2 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19845440A DE19845440A1 (de) 1998-10-02 1998-10-02 Stichtiefdruckverfahren zum vollflächigen Bedrucken großer Flächen
DE19845440 1998-10-02
PCT/EP1999/007217 WO2000020217A1 (fr) 1998-10-02 1999-09-29 Procede d'heliogravure destine a l'impression complete de grandes surfaces

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EP1119457A1 EP1119457A1 (fr) 2001-08-01
EP1119457B1 EP1119457B1 (fr) 2002-12-04
EP1119457B2 true EP1119457B2 (fr) 2014-07-23

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EP (1) EP1119457B2 (fr)
JP (2) JP4392779B2 (fr)
CN (1) CN1159152C (fr)
AR (1) AR020890A1 (fr)
AT (1) ATE228932T1 (fr)
AU (1) AU755233B2 (fr)
CA (1) CA2345227C (fr)
DE (2) DE19845440A1 (fr)
DK (1) DK1119457T3 (fr)
ES (1) ES2188246T3 (fr)
PL (1) PL190716B1 (fr)
PT (1) PT1119457E (fr)
RU (1) RU2230667C2 (fr)
TR (1) TR200100908T2 (fr)
UA (1) UA70969C2 (fr)
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AU755233B2 (en) 2002-12-05
CA2345227C (fr) 2007-08-07
AU6088199A (en) 2000-04-26
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ATE228932T1 (de) 2002-12-15
JP4392779B2 (ja) 2010-01-06
DK1119457T3 (da) 2003-03-24
US6811858B1 (en) 2004-11-02
RU2230667C2 (ru) 2004-06-20
ES2188246T3 (es) 2003-06-16
DE59903682D1 (de) 2003-01-16
PL190716B1 (pl) 2005-12-30
DE19845440A1 (de) 2000-04-06
JP2009214555A (ja) 2009-09-24
CN1159152C (zh) 2004-07-28
TR200100908T2 (tr) 2001-08-21
EP1119457A1 (fr) 2001-08-01
CA2345227A1 (fr) 2000-04-13
ZA200102253B (en) 2001-12-11
WO2000020217A1 (fr) 2000-04-13
JP5229964B2 (ja) 2013-07-03
CN1316952A (zh) 2001-10-10
EP1119457B1 (fr) 2002-12-04
PT1119457E (pt) 2003-03-31
PL347154A1 (en) 2002-03-25
US7350461B2 (en) 2008-04-01
UA70969C2 (uk) 2004-11-15
JP2002526290A (ja) 2002-08-20

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