DE102010035313A1 - Security element with aligned magnetic pigments - Google Patents

Abstract

The invention relates to a security element (12) for security papers, documents of value and other data carriers, having a color layer (20) with magnetically aligned magnetic pigments (44) which form a first motif (22) in the form of patterns, characters or a coding, which Tilting the security element shows a dynamic movement effect. According to the invention, the first, dynamic motif (22) is combined with a second motif in the form of an embossed structure which has raised embossing elements with flanks of different orientation, so that the magnetic pigments arranged on flanks of different orientation reflect different incident light and the second motif when tilting the security element shows a tilting effect.

Description

The invention relates to a security element for security papers, documents of value and other data carriers, with a color layer with magnetically oriented magnetic pigments forming a first motif in the form of patterns, characters or a coding, which shows a dynamic movement effect when tilting the security element. The invention further relates to a method for producing such a security element as well as a data carrier or a security paper with such a security element.

Data carriers, such as valuables or identity documents, but also other valuables, such as branded goods, are often provided with security elements for the purpose of security, which permit verification of the authenticity of the data carrier and at the same time serve as protection against unauthorized reproduction. The security elements can be embodied, for example, in the form of a security thread embedded in a banknote, a covering film for a banknote with a hole, an applied security strip, a self-supporting transfer element or also in the form of a feature area applied directly to a value document.

A special role in the authenticity assurance play security elements, the viewing angle-dependent visual effects show, as they can not be reproduced even with the latest copiers. For some time, magnetically orientable effect pigments have been used for this purpose, which are magnetically aligned in the form of a motif to be displayed.

Proceeding from this, the object of the invention is to specify a security element of the type mentioned at the beginning, which combines high security against counterfeiting with good visibility and easier verifiability. This object is solved by the security element having the features of the independent product claim. A method for producing such a security element and a data carrier and a security paper with such a security element are specified in the independent claims. Further developments of the invention are the subject of the dependent claims.

According to the invention, in a generic security element, the first dynamic motif of the magnetically aligned magnetic pigments is combined with a second motif in the form of an embossed structure having raised embossing elements with flanks of different orientation so that the magnetic pigments arranged on flanks of different orientation reflect different incident light, and the second motif shows a tilting effect when tilting the security element.

By combining a first motive with a dynamic motion effect and a second motive with a tilting effect, the attention and recognition value and thus the security against forgery of the security element are significantly increased. In addition, a tactile security feature is provided by the second motif in the form of an embossed structure with raised embossing elements, which also increases the security against counterfeiting of the security element, since the second motif in the form of an embossed structure, as well as the first motive showing a dynamic motion effect even with the latest copiers not can be reproduced.

The first motif, in the form of a pattern, character, or encoding, is an optically variable security feature that exhibits a dynamic motion effect.

The second motif according to the invention in the form of an embossed structure is likewise an optically variable security feature which exhibits a tilting effect when the security element is tilted. In the context of the present application, "tilting effect" is understood to mean an effect in which a viewer perceives a different image impression of the subject under consideration from different viewing angles. For example, a viewer of the second motif of the security element according to the invention will perceive a different color or brightness impression of the second motif depending on the viewing angle. The tilting effect of the second motif of the security element according to the invention is due to the fact that the raised embossing elements have flanks with a different orientation, so that the magnetic pigments arranged on flanks of different orientation reflect light incident differently. When tilting the security element, the orientation of the flanks and the magnetic pigments arranged thereon is changed, so that the viewer perceives the tilting effect described above. The tilting effect according to the invention can be achieved with all magnetic pigments which at least partially reflect incident light, ie electromagnetic radiation in the visible wavelength range from about 380 nm to 780 nm, which is the case for the majority of the available magnetic pigments.

In a preferred embodiment, the magnetic pigments are non-spherical, in particular platelet-shaped. This has the advantage that the magnetic pigments on the one hand can be relatively magnetically aligned and on the other hand, the magnetic pigments on the flanks of the Embossing elements are usually arranged so that shows a particularly good tilting effect. This will be explained in more detail below with reference to the figures.

Furthermore, it is preferred that the magnetic pigments are colored and / or optically variable. It should be noted that a distinction between colored and optically variable magnetic pigments is not always clear because z. B. certain colored, especially gold-colored magnetic pigments are optically variable to a certain extent. Without being bound to an explanation, these magnetic pigments are therefore presumably to some extent an optically variable appearance for a viewer, since it is generally not possible in terms of production technology to use magnetic pigments of the same kind in all directions, ie. H. isotropic to produce color.

In the optically variable magnetic pigments, pigments having an interference layer structure are particularly preferred. Magnetic pigments with an interference layer structure can be used with a particularly great advantage, showing several layers and a pronounced color-shift effect. These pigments, which are also referred to as (multilayer) thin-film elements, have at least one magnetic layer and, moreover, contain a multilayer structure for producing a color-shift effect. Such pigments are, for example, sold by SICPA SA under the brand name OVMI ^®.

The optically variable magnetic pigments with interference layer structure can, as in the EP 1 366 380 A2 described, are produced. In that regard, the disclosure of the EP 1366 380 A2 for the preparation and the properties of such pigments are included in the present description.

Alternatively, the magnetic pigments may also be wet-chemically produced multilayer pigments.

Alternatively, however, the magnetic pigments can also be formed on the basis of high-purity iron powder and in particular be prepared from reducing-treated carbonyl iron powder. Advantageous platelet-shaped iron pigments can in particular the document EP 1251152 B1 are taken from the disclosure of the preparation and properties of such pigments in the present description.

In a preferred embodiment, the magnetic pigments are present as a mixture of different, preferably platelet-shaped magnetic pigments.

The ratio of the largest to the smallest diameter of the platelet-shaped magnetic pigments is advantageously more than 5: 1, preferably more than 10: 1. This ratio is particularly preferably between 40: 1 and 400: 1. The largest diameter of the platelet-shaped magnetic pigments is advantageously more than 2 μm, preferably more than 5 μm, more preferably more than 10 μm and very particularly preferably more than 15 μm. Platelet-shaped magnetic pigments, in particular in the preferred size range and in the preferred diameter-to-thickness range, can be oriented as desired by an external magnetic field relative to the layer plane of the color layer. With high diameter-to-thickness ratios, high contrasts between translucent and opaque layer areas can be set.

The oriented platelet-shaped magnetic pigments form an effective three-dimensional appearance to the human eye, which in the context of this description is referred to as a "3D effect" or "3D impression". The three-dimensional appearance is associated with a dynamic movement effect, in which the position of the generated motif seems to move when tilting the security element or when changing the viewing or lighting direction.

In a preferred embodiment, the preferably platelet-shaped magnetic pigments are aligned by a magnet, in particular by a ball magnet or by a plurality of spaced ball magnets in the form of a centrosymmetric motif. With particular advantage, the preferably platelet-shaped magnetic pigments in the interior of the centrosymmetric motif are aligned substantially perpendicular to the surface of the ink layer, and are aligned outside the centrosymmetric motif with a sharp transition substantially parallel to the surface of the ink layer.

The alignment is done in a preferred variant by exactly one ball magnet in the form of the first motif.

In another likewise advantageous variant of the invention, the magnetic pigments are aligned by a plurality of spaced-apart spherical magnets in the form of the first motif. The plurality of ball magnets can be in direct contact with each other during the alignment step or separated from each other by spacers. The ball magnets can be arranged with such a large distance that their magnetic fields do not influence each other practically. However, it is also possible to selectively overlay the magnetic fields of the individual spheres to produce attractive orientations use. In all variants simultaneously ball magnets of different diameters can be used.

Another way to specifically control the orientation of the magnetic pigments, is to adjust the distance of the ball magnet or the ball magnets to the color layer of the security element suitable. The smaller this distance, the greater the selectivity from oriented to non-oriented areas. The most pronounced 3D effect, on the other hand, is achieved at slightly greater distances. When aligning a plurality of spherical magnets can be arranged at different distances to the ink layer and thus create motifs with different degrees of expression of the 3D effect and different selectivity.

In a further preferred embodiment, the preferably platelet-shaped magnetic pigments are aligned in the form of a motif having two regions in which the magnetic pigments are aligned substantially parallel to two planes pointing in different directions, preferably with a sharp transition between the regions.

According to another preferred embodiment, the orientation of the preferably platelet-shaped magnetic pigments is in the form of a motif which contains a region in which the magnetic pigments are aligned in an arc relative to the surface of the ink layer. Such alignments / motifs can in particular the WO 2004/007095 A2 are taken from the disclosure of the production and properties of such orientations / motives in the present description.

In an advantageous variant of the invention, the second motif is arranged at least partially in the region of the first motif. This overlapping arrangement of first and second motifs results in a security element according to the invention with an exceptionally high counterfeit protection, since the optically variable effects of the first and second motif, i. H. the dynamic movement effect or the tilt effect, synergistically cooperate. Although the optically variable effects of the first and second motive taken alone by z. B. color copiers are reproducible, by the overlapping arrangement of the first and second motif imitation with z. B. made impossible color copiers. Namely, the overlapping areas of the first and second motifs result in such a complex superimposition of the dynamic effect of the first subject and the tilting effect of the second motif that any attempted counterfeiting is doomed to failure. Apart from the increased security against imitation such a design with at least partially overlapping first and second motif is also relatively appealing to the viewer, which increases the recognition value of a security element according to the invention and thus ultimately also the security against counterfeiting.

Of course, it is also possible that the second motif is arranged substantially completely within the region of the first motif.

In addition, first and second motif to increase the security against counterfeiting can also be arranged in register to each other. Such an arrangement of the first and second motif with perfect registration "sews" the motifs of the color layer together, as it were. If the embossed structure of the second motif beyond even in the vicinity of the surrounding substrate z. B. a document of value or security paper continued, on which the security element according to the invention is arranged, the security element is also "sewn" with the surrounding substrate.

In a likewise advantageous variant of the invention, the first and second motif are in a context of meaning or form a coherent overall motif. In the context of the present application, "context of meaning" is understood to mean a connection that the viewer makes according to the meaning. For example, the first motif could be formed centrosymmetrically in the form of a sun, while the second motif is in the form of sun rays extending away from the sun. Another example of two meaningful motifs would be a sphere for a motif and a second motif in the form of a vessel adapted to the shape of the sphere. Also in this case, the ball could be formed by a subject with dynamic motion effect and the vessel by a subject with tilting effect, which of course also the reverse assignment of dynamic motion effect and tilt effect is possible to the subjects. In other words, the vessel could be designed as the first motive with dynamic motion effect and the sphere as second motive with tilting effect.

In a further advantageous variant of the invention, it is further preferred if the first and second motif form a coherent overall motif. In this case too, reference may be made again to the examples described above "sun / sunbeams" and "sphere / vessel". Of course, it is also possible, for example, an object or a product, for. As a house, a table, a car or a sheet of music to form by the arrangement of the first and second motif according to the invention. For this purpose, the first and second motif may advantageously overlap. However, it is not for the formation of such a total motive Required that the second motif is at least partially located in the area of the first subject.

In a preferred variant of the invention it is provided that the raised embossing elements of the embossing structure are formed linear. Below a line will hereinafter according to the in the Pocketbook of Mathematics, Bronstein, Semendjajew, 25th edition , Definition defined a combination of two points. Of course, according to this definition, in addition to a straight connection also includes a non-linear, ie curved, curved or spiral connection of two points in two or three-dimensional space with. In terms of the present invention, this means that linear embossing elements are understood to mean all three-dimensional elements whose projections form a line in the plane of the optically variable element in accordance with the above definition.

According to the invention, line-shaped stamping elements which are straight are preferred. Conceivable but also curved, spiral and differently shaped embossing elements.

The line-shaped embossing elements advantageously have a width of from 10 μm to 500 μm, preferably from 20 μm to 180 μm and very particularly preferably from 30 μm to 150 μm.

To the preferred width of the line-shaped embossing elements is still to be noted that this need not necessarily be constant or substantially constant over the length of a stamping element. Rather, it may even be preferable to modulate the width of the embossing elements in a predetermined manner. Such an embossing element has along its length then z. B. a continuously changed width, which further increases the recognition value and thus the security against forgery of the security element according to the invention. If the embossing elements are changed in width according to one or both sides, the term "half-sided or double-sided modulated embossing element" is used. In addition, it should also be noted that a one- or two-sided modulation can be done both continuously and in the form of one or more stages along the embossing element.

The line-shaped embossing elements advantageously have at their base a distance of from 0 μm to 300 μm, preferably from 0 μm to 50 μm.

Furthermore, the line-shaped embossing elements preferably have a length of more than 150 μm, more preferably of more than 1000 μm.

The height of the embossing elements is about 10 microns to 300 microns, preferably about 20 microns to 200 microns and most preferably about 30 microns to 120 microns.

If a plurality of substantially parallel arranged line-shaped embossing elements is provided for the embossing structure, the line density is approx. 10 lines / cm to 1000 lines / cm, preferably 20 lines / cm to 300 lines / cm, and most preferably 40 lines / cm to 150 lines / cm.

The embossing structure forming the second motif may advantageously have a plurality of regions, in each of which a multiplicity of substantially linearly arranged line-shaped embossing elements is arranged. It has been shown that the provision of several areas, each with a plurality of substantially parallel arranged embossing elements for generating responsive tilting effects is particularly suitable. The number of areas is with advantage as eight.

Also particularly preferred is a security element, in which the plurality of substantially parallel arranged linear embossed elements of adjacent regions extend in different directions such that the second motif shows a second dynamic movement effect when the security element is tilted. The second dynamic movement effect perceivable by the viewer for these special embodiments is thus a special case of the general tilting effect claimed according to the invention for the second motif. Security elements that simultaneously display a second dynamic motion effect of the second subject and the dynamic motion effect of the first subject are extremely tamper-proof and, moreover, very appealing to a viewer.

Particularly appealing and preferred dynamic motion effects of the second motif can be generated in particular by the angle between the directions of two adjacent regions having substantially parallel line-shaped embossing elements being between 1 ° and 15 °, particularly preferably between 3 ° and 10 °. The viewer perceives in such embodiments when tilting the security element a relatively finely graded movement through the second motif true.

For embodiments with first and second dynamic motion effect, it is further preferred if the first dynamic movement effect of the first motif defines a first movement direction and the second dynamic movement effect of the second motif defines a second movement direction and the angle between first and second movement directions 45 ° to 90 °, preferably 70 ° to 90 ° and most preferably is substantially 90 °. The latter embodiment with an angle of substantially 90 ° between the first and second directions of movement can be achieved particularly well with a first dynamic movement effect, as described for example in the document WO 2004/007095 A2 is described. The viewer of such an embodiment can then perceive a movement in the first direction of movement and a movement arranged substantially perpendicular thereto in the direction of the second direction of movement, which enables a variety of design variants with a high recognition value and thus a large protection against counterfeiting.

The ink layer can be a printing layer produced by a printing method known per se, with a color layer which is formed as a screen printing layer currently being preferred.

In order to enable the fixation of the oriented magnetic pigments, the color layer with the magnetic pigments is expediently formed on the basis of a UV-curing color system, pure UV systems, UV / water-based systems or even UV / solvent-based systems being considered.

In addition to the magnetically oriented magnetic pigments, the color layer may also comprise dyes, luminescent substances or further pigments, in particular colored pigments, luminescent or optically variable pigments, for example pigments prepared on the basis of liquid-crystalline polymers, or iridescent pearlescent pigments, as described, for example, in US Pat. B. from Merck KGaA under the name "Iriodin ^® " are sold contain. In addition, the color layer but also z. B. further magnetic, in particular soft magnetic pigments. All additives can have machine readable properties.

Furthermore, an embodiment is preferred in which the color layer is arranged on a background layer which is colored or optically variable, or which has magnetic properties. In particular, the background layer may have a colored or optically variable or magnetically coded marking. Such a marking can also interact visually with the first and / or second motif and, for example, be in a sense context with the first and / or second motif or form a coherent motif.

The security element according to the invention can be further equipped with one or more protective layers for use as a security element for security papers, documents of value and other data carriers, for. B. with a transparent protective lacquer.

• – auf ein Substrat eine Farbschicht mit magnetisch ausrichtbaren Magnetpigmenten aufgebracht wird,
• – die Magnetpigmente magnetisch in Form von Muster, Zeichen oder einer Codierung ausgerichtet und in ihrer Ausrichtung fixiert werden, wodurch ein erstes Motiv mit einem dynamischen Bewegungseffekt erzeugt wird, und
• – mittels eines Prägewerkzeuges in der Farbschicht eine Prägestruktur mit erhabenen Prägeelementen derart erzeugt wird, dass die Prägeelemente Flanken unterschiedliche Orientierung aufweisen, und die auf den Flanken unterschiedlicher Orientierung angeordneten Magnetpigmente einfallendes Licht unterschiedlich reflektieren, so dass das zweite Motiv beim Kippen des Sicherheitselements einen Kippeffekt zeigt.

The invention also includes a method for producing a security element for securing security papers, value documents and other data carriers, in which

• A color layer with magnetically orientable magnetic pigments is applied to a substrate,
• - The magnetic pigments are magnetically aligned in the form of patterns, characters or a coding and fixed in their orientation, whereby a first motif is generated with a dynamic movement effect, and
• - By means of an embossing tool in the ink layer an embossed structure with raised embossing elements is generated such that the embossing elements edges have different orientation, and arranged on the flanks of different orientation magnetic pigments differently reflect incident light, so that the second motif shows a tilting effect when tilting the security element ,

In a preferred process variant, a color layer based on a UV-curing color system is used and the aligned magnetic pigments are fixed by UV curing of the color layer. The ink layer is preferably printed by screen printing, even if fundamentally other printing processes, such as flexographic printing, offset printing or intaglio printing, come into question.

In a likewise preferred variant of the method, a non-ink-bearing gravure printing plate, in particular a non-ink-bearing intaglio printing plate, is used as embossing tool and the embossed structure is produced as so-called "blind embossing in the color layer. In principle, however, it is also conceivable to use an ink-bearing intaglio printing plate as the embossing tool, in particular an ink-bearing intaglio printing plate, whereby the security element is produced with embossing structure according to the invention and at the same time a further application of ink in the area of the embossed structure. It would be conceivable z. B. the use of translucent, d. H. translucent colors, which produce a mixed color with the color of the magnetic pigment containing color layer.

Finally, the invention also encompasses a data carrier or a security paper with a security element of the type described, wherein the security element can be arranged both in an opaque region of the data carrier and at least partially in or above a transparent window region or a continuous opening of the data carrier. The data carrier can in particular be a value document, such as a banknote, in particular a paper banknote, a polymer banknote or a foil-paper composite banknote, or an identity card, such as a banknote for example, a credit card, a bank card, a cash card, an authorization card, an identity card, or a passport personalization page. In addition, the security element according to the invention can also be used for securing products of any kind, that is for so-called product security. For example, with the security element according to the invention packaging, z. As drug packages, especially folding cartons or cartons to be protected against imitation. In addition to product protection, the security element according to the invention can also be advantageously used for trademark protection.

• – komplexe Herstellung; die Bedruckstoffe, Farben und Prägewerkzeuge sind nicht ohne Weiteres auf dem freien Markt verfügbar;
• – gute Erkennbarkeit der relevanten Sicherheitseffekte ohne Hilfsmittel; Erhöhung des Anteils der Wertschöpfung in der Druckerei, da durch die Prägestruktur ein zusätzlicher Designeffekt mit deutlich erhöhter Sicherheit erreicht wird; und
• – Erhöhung der Sicherheit des Datenträgers durch Kombinationseffekte und eine mit anderen Verfahren nicht ohne Weiteres erreichbarer Passergenauigkeit.

Overall, the proposed combination of a first motif with a dynamic motion effect with a second motif with a tilting effect in a security element according to the invention offers the following advantages in particular:

• - complex production; the substrates, colors and embossing tools are not readily available on the open market;
• - good visibility of the relevant safety effects without aids; Increasing the share of added value in the printing works, as the embossing structure achieves an additional design effect with significantly increased safety; and
• - Increasing the security of the data carrier by combination effects and with other methods not easily achievable registration accuracy.

Further exemplary embodiments and advantages of the invention are explained below with reference to the figures, in the representation of which a representation true to scale and proportion has been dispensed with in order to increase the clarity. The various embodiments are not limited to use in the specific form described, but can also be combined with each other.

Show it:

1 a schematic representation of a banknote with a security element according to the invention,

2 a plan view of the security element of the invention 1 .

3 schematically the orientation of the still movable magnetic pigments of a security element according to the invention in the field of a spherical magnet,

4 a cross section through the security element of 2 along the line AA,

5 a plan view of another embodiment of the security element according to the invention,

6 a plan view of another embodiment of the security element according to the invention, and

7 a plan view of yet another embodiment of the security element according to the invention.

The invention will now be explained using the example of a security element for banknotes. 1 shows a schematic representation of a banknote 10 that with an in 2 more precisely illustrated security element 12 is provided with a first and second motif.

Regarding 2 indicates the security element 12 a color layer 20 with magnetically oriented, platelet-shaped magnetic pigments, which by a spherical magnet in the form of a relatively sharply defined circular marking 22 are aligned. It should be noted that the color layer 20 essentially completely on the in 2 not shown substrate is arranged. The circular marking 22 shows a three-dimensional appearance and a dynamic movement effect, in which the position of the marking 22 on the security element 12 seems to move when tilting the security element or when changing the viewing or lighting direction, and therefore forms a dynamic motif.

The dynamic motif 22 is with a second motif 38 in the form of an embossed structure 32 combined, the raised embossing elements 34a . 34b . 34c with flanks 35 . 36 having. How very good 4 it can be seen, have the flanks 35 . 36 the embossing elements 34d a different orientation, so that arranged on the flanks of different orientation magnetic pigments 44 reflect incident light differently and thus the second motive 38 shows a tilting effect when tilting the security element.

In the embodiment of 2 both the first and the second motif are centrosymmetric, circular in the present case. First motive 22 and second motive 38 are not overlapped for reasons of clarity. It is understood that in practice a certain overlap between the first and second motif is usually provided in order to increase the counterfeit protection by the synergistic interaction of the dynamic movement effect and the tilting effect of the first and second motif, respectively.

The security element according to 2 therefore has a first motif 22 with dynamic movement effect and a second motif 38 with a tactile embossed structure 32 on. First motive 22 and second motive 38 interact and form a coherent centrosymmetric overall motif.

The viewer can see the security element 12 also easy to check for authenticity, as the combination of dynamic motif 22 and tactile motive 38 can be tested without aids.

Finally, as explained in more detail below, it is possible to generate the second motif 38 produce special effects in the security element according to the invention, which can not be achieved or only with difficulty in other ways.

With reference to the 2 to 4 First, the orientation of the magnetic pigments 44 the color layer 20 with a ball magnet 30 described in more detail. 4 shows a cross section through the security element of 2 along the line AA while 3 schematically the orientation of the still moving magnetic pigments 44 in the field of a sphere magnet 30 shows.

For the magnetic pigments 44 they may be, for example, platelet-shaped iron pigments which are made from reducing-treated carbonyl iron powder and which can be produced with a high ratio of platelet diameter to platelet thickness. Also suitable are wet-chemically prepared pigments with a support of mica or mica and an outer shell of iron oxide (Fe ₃ O ₄ ), which gives the magnetic pigments their magnetic properties. Such pigments are for example offered by Merck KGaA under the name Colorona Blackstar (R). By changing the iron oxide layer thickness, different shades can be achieved (eg green, blue, red). Substantially opaque pigments with a color-shift effect, for example under the name Colorcrypt (R), or substantially opaque pigments with a uniform color, are also available for security printing. For example, a gold-colored magnetically orientable magnetic pigment may comprise Al ₂ O ₃ coated with Fe ₂ O ₃ and MgO.

In the embodiment, for the production of the security element 12 on a substrate 40 a color layer 20 based on a UV-curable color system containing the desired magnetically alignable, platelet-shaped magnetic pigments 44 contains. The printing of the color layer 20 takes place preferably by screen printing.

Then the substrate becomes 40 with the in the paint layer 20 still moving magnetic pigments 44 at a small distance over a ball magnet 30 brought ( 3 ). The spherical magnetic field lines 31 of the ball magnet 30 set up in a defined area 42 the magnetic pigments 44 substantially perpendicular to the substrate surface, while the preferred orientation of the magnetic pigments 44 outside the range 42 essentially parallel to the substrate surface. The oriented magnetic pigments 44 are permanently fixed in their orientation by curing the UV varnish, as in the cross section of 4 shown.

This creates a centrosymmetric, circular marking 22 which in their interior is a substantially uniformly aligned area 24 ( 2 ) contains, in which the magnetic pigments 44 are substantially perpendicular to the substrate surface. In a narrow transition area 26 goes the inner area 24 in the surrounding area 21 the marking over, in which the magnetic pigments of the paint layer 20 are aligned substantially parallel to the surface thereof. For clarity, the surrounding area 21 with substantially parallel to the substrate surface aligned magnetic pigments 44 in 2 only between range 26 and 37a although such, with respect to the substrate surface parallel alignment of the magnetic pigments 44 in all areas of the paint layer 20 Is present, in which the magnetic pigments 44 not by the magnetic field of the ball magnet 30 were aligned. That is, especially in the area 37c surrounding area of the paint layer 20 are the magnetic pigments 44 aligned prior to introduction of an embossing structure according to the invention substantially parallel to the substrate surface.

After alignment and fixation of the magnetic pigments 44 is in the color layer 20 an embossing structure by means of an embossing tool 32 with raised embossing elements 34a . 34b . 34c of which in 4 For better clarity, only the embossing elements 34a are shown produced. The embossing tool is advantageously a non-ink-bearing intaglio printing plate is used, ie a gravure printing plate in which the engraved and provided for embossing depressions have no color. The action of such a non-ink-bearing intaglio printing plate becomes the substrate 40 including the color layer disposed thereon 20 pressed into the wells, so that in the result the in 4 shown raised embossing elements 34a be generated. The reference to the substrate height H of the embossing elements 34a is about 30 microns to 120 microns, so that these embossing elements 34a form a tactile relief. By means of the non-ink-bearing intaglio printing plate is the embossed structure 32 With all raised embossing elements generated the second motif 38 form. The embossed structure 32 is in 2 as a three partial embossed structures 32a . 32b and 32c comprehensive embossed structure 32 shown in the fields 37a . 37b . 37c are arranged. In practice, the introduced embossed structure 32 of the second motif 38 Usually arranged in significantly more areas, especially in more than 8 areas, whereby a particularly impressive tilting effect can be generated in the form of a dynamic movement effect. The formation of such a tilting effect will now be with reference to 2 and 4 explained in more detail.

The embossed structure 32a is in the area 37a arranged according to 2 directly to the surrounding area 21 of the first motif 22 followed. As already mentioned, the first and second motifs are generally arranged to increase the security against counterfeiting, at least partially overlapping, which, however, for reasons of clarity in FIG 2 and 4 not shown. The embossed structure 32a includes the raised embossing elements 34a , which are designed as straight lines. In the first area 37a of the second motif 38 are next to the in 4 In cross-section shown embossing elements 34a arranged a plurality of substantially parallel line-shaped embossing elements. How out 4 can be further seen, limit the embossing elements 34a directly to each other, ie the distance at the base of the embossing elements is in this case 0 microns.

The embossing elements 34a have the approx 4 in cross-section shown shape. It is understood that the in 4 shown cross section of the embossing elements 34a is only schematic. Regardless of the embossing elements 34a always flanks different orientation on which magnetic pigments are arranged. For example, has an embossing element 34a a flank 36 on, which differ from the one with the reference number 36B designated base of the embossing element 34a to the one with the reference numeral 36Z designated zenith of the embossing element 34a extends. Accordingly, the embossing element 34a a flank 35 different orientation, different from the base of the embossing element 35B until the zenith 36Z extends. It is understood that the extent and the beginning and end of a flank in 4 are shown in idealized form. Irrespective of this, for all embossing structures according to the invention, the embossing elements have flanks of different orientation.

The on the differently oriented flanks 35 and 36 arranged magnetic pigments are therefore also oriented differently. As a result, those on the flank 35 arranged magnetic pigments 44B therefore, light incident from a given direction will reflect differently than those on the differently oriented flank 36 arranged magnetic pigments 44C , A viewer, for example, from the viewing direction C on the facing flanks 36 the embossing elements 34a of the first area 37a of the second motif 38 looks, the flanks will 36 perceive with a different color or brightness than the edges 35 the embossing elements 34a , This different image impression, ie this different perception of the colors and / or brightness of the flanks 35 and 36 is due to the different reflection of the arranged on these flanks magnetic pigments 44B respectively. 44C due.

The viewer changes the viewing direction from the direction C over the substantially vertical viewing direction A to the viewing direction 13 , the color and / or brightness impression for the flanks becomes 35 and 36 change. That is, the viewer takes on the second motif when tilting the security element 38 associated tipping effect true.

This one for the first area 37a of the second motif 38 described tilting effect is in a similar way by the viewer for the in 4 not shown areas 37b and 37c of the second motif 38 observed.

As in 2 shown, the plurality of substantially parallel arranged linear embossing elements extends 34a of the area 37a in one direction 39a , The plurality of substantially parallel arranged linear embossing elements of the embossed structure 32b of the adjacent area 37b however, extends in the direction of 39b while the plurality of substantially parallel arranged line-shaped embossing elements of the area 37c in the direction 39c extends. In the example according to 2 is the angle between the directions 39a and 39b about 10 °. Also the angle between the directions 39b and 39c the neighboring areas 37b and 37c is about 10 °. When tilting the security element 12 allows the viewer of the second subject with the areas 37a . 37b and 37c thus perceiving a tipping effect, which acts as a dynamic moving effect over the areas 37a to 37c is trained. Such a dynamic movement effect of the second motif 38 is associated with a high recognition value for the viewer and works with the dynamic movement effect of the first subject 22 synergistically together, so that such a security element has an extremely high counterfeit protection due to this combination effect.

Regarding 5 Now, another preferred embodiment is described The color layer 20 again has a dynamic first motive 52 and a second motif 68 with tipping effect on. The tilting effect of the motif 68 essentially corresponds to the tilt effect of the subject 38 of the 2 , As well as in 2 are in 5 also only three areas 67a . 67b and 67c of the second motif 68 whereas in practice substantially more areas, in particular more than 8 areas, can be provided to achieve a particularly impressive dynamic effect.

Unlike the first motif 22 of the 2 is it in the 5 illustrated first motif 52 not a centrosymmetric motif, but a motif with a symmetry, as in particular in the document WO 2004/007095 A2 is described. For example, the dynamic creative may be 52 to act with a motif with arcuately oriented magnetic pigments, wherein as in the embodiment of the 2 also in the embodiment of 5 an inner area 54 is drawn in, in which the magnetic pigments are oriented substantially perpendicular to the substrate surface. In the transition area 56 goes the inner area 54 in the surrounding area 51 over, in which the magnetic pigments of the color layer 20 are aligned substantially parallel to the substrate surface. The environment area 51 thus covers all areas of the color layer 20 in which the magnetic pigments have not been aligned by the external magnet and thus extends substantially beyond those color layer areas that are outside the second motif 52 lie.

While the first dynamic motif 52 a movement in the direction 59 is defined, the embossed structure and in particular the orientation of the embossing elements in the areas 67a . 67b and 67c chosen so that a dynamic movement effect of the second motif in the direction 69 results. Thus, the angle between the first direction of movement 59 and second direction of movement 69 in the embodiment according to 5 about 70 ° to 80 °. Also in the security element according to 5 The first and second motifs overlap in regions, so that the first and second dynamic motion effects combine in a synergistic manner to an extraordinarily high recognition value for the viewer. Thus, the special embodiment of the 5 the already mentioned advantages of the invention, in particular an extremely high security against counterfeiting.

Another embodiment of the invention is in 6 shown. The color layer 20 again has a dynamic first motive 52 and a second motif 78 with tipping effect on. At the first motive 52 it concerns a motive with a symmetry, as in particular in the document WO 2004/007095 A2 described and already related to 5 was explained in more detail. The first motive 52 includes an inner area 54 in which the magnetic pigments are oriented substantially perpendicular to the substrate surface, and a transition region 56 in which the inner area 54 in the surrounding area 51 passes in which the magnetic pigments of the paint layer 20 are aligned substantially parallel to the substrate surface. Also in this embodiment, the surrounding area includes 51 all areas of the color layer 20 in which the magnetic pigments were not aligned by the external magnet.

Unlike the second motif 68 of the 5 is it in the 6 illustrated second motif 78 to create a motif in the 6 illustrated form. The second motif 78 therefore includes the areas 77a . 77b . 77c . 77d . 77e in which the embossed structure is arranged. As already related to 2 and 5 are explained in the fields 37a to 37e a respective plurality of substantially parallel arranged linear embossing elements of the embossing structure, wherein the plurality of substantially parallel arranged linear embossing elements of each area extending in one direction and the angle between the directions of adjacent areas is selected such that when tilting the security element 72 the viewer of the second motif 78 can perceive a tipping effect. Here is the tilting effect of the second motif 78 as a dynamic movement effect over the areas 77a to 77e trained to move in the direction 79 Are defined. Thus, the angle between the first direction of movement 59 and second direction of movement 79 in the embodiment according to 6 about 90 °. Such a security element according to the invention is characterized in that a dynamic movement effect with a linear direction of movement 59 respectively. 79 is achieved in technically completely different ways, namely on the one hand by the appropriate orientation of the magnetic pigments of the first motif 52 and by the provision of embossing structures according to the invention in the region of the second motif 78 , Achieving a linear dynamic motion effect by various techniques according to the embodiment of the 6 makes this variant of the invention extremely forgery-proof, since a forgery attempt requires considerable expenditure on equipment. Furthermore, a variant according to 6 also very appealing to the viewer and moreover easy to check their authenticity.

Finally shows 7 an embodiment in which the security element according to the invention 82 a first motive 52 and a second motif 88 includes, the first subject 52 z. B. may be formed again as a dynamic motif with arc-shaped magnetic pigments, and the second motif 88 in the form of a digit or a Letter is formed. In 7 that is by embossing the color layer 20 preserved second motif 88 represented in the form of the number "1", this number is only for illustration and of course any other numbers, numbers, letters, etc. may be provided. The second motif has a variety of areas 87a to 87p on, in each of which a plurality of substantially parallel arranged line-shaped embossing elements is provided, wherein the embossing elements of a region extend in a predetermined direction. The angle between the directions of two adjacent areas is chosen so that the second motif 88 when tilting the security element 82 a movement in the direction 89 shows.

The dynamic first motive 52 again shows a movement effect in the direction 59 while the second motive 88 in the form of an embossed structure with raised embossing elements a movement in the direction 89 which preferably is substantially perpendicular to the direction 59 is oriented. The second motif 88 Due to the embossing pattern that forms the motif, it is designed as a tactile human feature and can thus be captured haptically visually as well as through its tactility via the dynamic movement effect. In addition to the high protection against counterfeiting realized in particular by the first and second movement effect, the security is further increased by the tactile checking possibility of the security element by the man or the woman on the street.

It is understood that a tactile second motif 88 also at the in 1 to 6 described security elements is provided and the formation of the second motif in the form of numerals, letters, etc., of course, in the variants of 1 to 6 can be provided. It is also possible in all embodiments shown and described that only a part of the second motif has tactile areas in the form of a digit, a letter, etc., and the other part of the second motif z. B. as a motif with centrosymmetric symmetry according to the in 2 and 5 shown embodiment is formed.

Finally, it should be noted that the directions defined by the plurality of embossing elements 39a . 39b . 39c ( 2 ) 69 ( 5 ) 79 ( 6 ) 89 ( 7 ) and the direction defined by the dynamic motion effect of the first subject 59 ( 5 . 6 and 7 ) Of course, in the direction shown in the figures opposite direction can be perceived by the viewer.

LIST OF REFERENCE NUMBERS

10

bill

12

security element

20

coat of paint

21

surrounding area

22

first motive

24

inner area

26

Transition area

30

bullet magnet

31

field lines

32, 32a, 32b, 32c

embossed structure

34, 34a

embossing elements

35, 36

Flanks of the embossing elements

37a, 37b, 37c

Areas of the second motif

38

second motif

39a, 39b, 39c

Directions of the arrangement of the embossing elements

40

substratum

44, 44B, 44C

magnetic pigments

51

surrounding area

52

first motive

54

inner area

56

Transition area

59

Movement direction first motive

62

security element

67a, 67b, 67c

Areas of the second motif

68

second motif

69

Movement direction second motive

72

security element

77a to 77e

Areas of the second motif

78

second motif

79

Movement direction second motive

82

security element

87a to 87p

Areas of the second motif

88

second motif

89

Direction of movement of the second motif

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 1366380 A2 [0012, 0012]
• EP 1251152 B1 [0014]
• WO 2004/007095 A2 [0023, 0040, 0080, 0082]

Cited non-patent literature

• Paperback of Mathematics, Bronstein, Semendjajew, 25th Edition [0029]

Claims (18)

Security element for security papers, documents of value and other data carriers, having a color layer with magnetically oriented magnetic pigments which form a first motif in the form of a pattern, character or a coding which shows a dynamic movement effect when the security element is tilted, characterized in that the first dynamic one Motive is combined with a second motif in the form of an embossed structure having raised embossing elements with edges of different orientation, so that arranged on flanks of different orientation magnetic pigments reflect incident light differently and the second motif shows a tilting effect when tilting the security element. Security element according to claim 1, characterized in that the magnetic pigments are non-spherical, in particular platelet-shaped. Security element according to claim 1 or 2, characterized in that the magnetic pigments are colored and / or optically variable, wherein the magnetic pigments are in particular formed as a color-shifting thin-film elements with an interference layer structure. Security element according to at least one of claims 1 to 3, characterized in that the magnetic pigments are formed on the basis of high-purity iron powder. Security element according to at least one of claims 1 to 4, characterized in that the magnetic pigments are aligned by a magnet, in particular by a ball magnet or by a plurality of spaced ball magnets, in the form of a centrosymmetric first motif. Security element according to at least one of claims 1 to 5, characterized in that the second motif is at least partially disposed in the region of the first motif and / or that the first and second motif are in a sense context or form a coherent overall motif. Security element according to at least one of claims 1 to 6, characterized in that the raised embossing elements of the embossing structure linear, in particular straight or curved, are formed, wherein the line-shaped embossing elements preferably has a width of 10 microns to 500 microns, more preferably 20 microns to 180 microns and most preferably from 30 microns to 150 microns. A security element according to claim 7, characterized in that the embossing structure has a plurality of substantially parallel arranged linear embossing elements, wherein the line-shaped embossing elements at its base a distance of 0 .mu.m to 300 .mu.m, preferably 0 .mu.m to 150 .mu.m and most preferably of 0 .mu.m have up to 50 microns. A security element according to claim 8, characterized in that the embossing structure has a plurality of regions, in each of which a plurality of substantially parallel arranged linear embossing elements are arranged, wherein the number of regions is preferably more than eight. A security element according to claim 9, characterized in that the plurality of substantially parallel arranged line-shaped embossing elements adjacent areas extend in different directions, that the second motif when tilting the security element shows a second dynamic movement effect, wherein the angle between the directions of two adjacent areas preferred between 1 ° and 15 °, more preferably between 3 ° and 10 °. A security element according to claim 10, characterized in that the first dynamic movement effect of the first motif define a first direction of movement and the second dynamic movement effect of the second motif a second direction of movement and the angle between the first and second directions of movement 45 ° to 90 °, preferably 70 ° to 90 ° and more preferably substantially 90 °. A security element according to at least one of claims 1 to 11, characterized in that the color layer with the magnetic pigments is formed by a screen-printing layer and / or on the basis of a UV-curing color system. Security element according to at least one of claims 1 to 12, characterized in that the color layer in addition to the magnetically alignable magnetic pigments further pigments, in particular colored pigments, optically variable pigments and / or soft magnetic pigments. A security element according to at least one of claims 1 to 13, characterized in that the color layer is arranged on a background layer which is colored or optically variable or has the magnetic properties, in particular that the background layer has a colored, optically variable or magnetically coded marking. Method for producing a security element for securing security papers, value documents and other data carriers, in which - a color layer with magnetically alignable magnetic pigments is applied to a substrate, - the magnetic pigments are magnetically aligned in the form of patterns, characters or a coding and fixed in their orientation whereby a first motif with a dynamic movement effect is produced, and - an embossing tool in the ink layer is used to produce an embossing structure with raised embossing elements such that the embossing elements have flanks of different orientation and the magnetic pigments arranged on the flanks of different orientation reflect different incident light, so that the second motif shows a tilting effect when tilting the security element. A method according to claim 15, characterized in that a color layer based on a UV-curing color system is used and the aligned magnetic pigments are fixed by UV curing of the ink layer, wherein the ink layer is preferably printed by screen printing. A method according to claim 15 or 16, characterized in that a non-ink-bearing intaglio printing plate, in particular a non-ink-bearing intaglio printing plate, is used as stamping tool and the embossing pattern is produced as a blind embossing in the ink layer. Data carrier or security paper with a security element according to at least one of claims 1 to 14 or with a security element produced according to at least one of claims 15 to 17.

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