EP2829411A1 - Security assembly for valuable items - Google Patents

Abstract

The invention relates to a security arrangement (10) for the protection of valuables, comprising a security element (12) and a decoder element (14), wherein - The security element (12) comprises a magnetic display (16) with a microcapsule-based ink layer (32) containing in a binder, a plurality of microcapsules (34), each having a capsule shell, enclosed in the capsule carrier liquid and a magnetically alignable, platelet-shaped Pigment, which is essentially freely rotatable in the microcapsule (34) and reversibly alignable by an external magnetic field, - The decoder element (14) has a magnetic region (45) in which hard magnetic material (46) having a coercive force of more than 50 kA / m is in the form of patterns, lines, characters or a coding, and - In superimposed state of security element (12) and decoder element (14), the magnetically alignable pigments of the microcapsules (34) of the security element (12) by the hard magnetic material (46) of the decoder element (14) are magnetically pre-aligned.

Description

The invention relates to a security arrangement for the protection of valuables, comprising a security element and a decoder element. The invention further relates to a method for producing such a security arrangement and a correspondingly equipped data carrier.

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 else in the form of a feature area printed directly on a document of value.

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 can be magnetically aligned in the form of a motif to be displayed.

From the publication WO 2009/074284 A2 is a combination of first optically variable effect pigments and second, by an external magnetic field reversibly alignable effect pigments known. The optically variable effect of the first effect pigments occurs with the interactively triggered, interacting with three-dimensional appearances produced by the magnetically orientable second effect pigments.

Proceeding from this, the object of the invention is to further improve the visual appearance of security elements with magnetically reversibly alignable magnetic pigments and, in particular, to combine an attractive visual appearance with high security against counterfeiting.

This object is achieved by the safety arrangement having the features of the main claim. A method for producing such a security arrangement and a correspondingly equipped data carrier are specified in the independent claims. Further developments of the invention are the subject of the dependent claims.

• das Sicherheitselement ein Magnetdisplay mit einer mikrokapselbasierten Farbschicht aufweist, die in einem Bindemittel eine Vielzahl von Mikrokapseln enthält, die jeweils eine Kapselhülle, eine in der Kapselhülle eingeschlossene Trägerflüssigkeit und ein magnetisch ausrichtbares, plättchenförmiges Pigment aufweisen, welches in der Mikrokapsel im Wesentlichen frei drehbar und durch ein externes Magnetfeld reversibel ausrichtbar ist,
• das Decoderelement einen Magnetbereich aufweist, in dem hartmagnetisches Material mit einer Koerzitivfeldstärke von mehr als 50 kA/ m in Form von Mustern, Linien, Zeichen oder einer Codierung vorliegt, und
• in übereinander angeordnetem Zustand von Sicherheitselement und Decoderelement die magnetisch ausrichtbaren Pigmente der Mikrokapseln des Sicherheitselements durch das hartmagnetische Material des Decoderelements magnetisch vorausgerichtet sind.

According to the invention, it is provided in a generic safety arrangement that

• the security element comprises a magnetic display having a microcapsule-based ink layer containing in a binder a plurality of microcapsules each having a capsule shell, a carrier liquid enclosed in the capsule shell, and a magnetically alignable platelet-shaped pigment which is substantially freely rotatable within and through the microcapsule an external magnetic field is reversibly alignable,
• the decoder element has a magnetic region in which hard magnetic material having a coercive force greater than 50 kA / m in the form of patterns, lines, characters or a coding, and
• in superimposed state of security element and decoder element, the magnetically alignable pigments of the microcapsules of the security element are magnetically pre-aligned by the hard magnetic material of the decoder element.

The magnetic display of the security element consists in the simplest case of a single ink layer with microcapsules of the type mentioned above. For the specific embodiments and variants of reversibly magnetically alignable pigments and microcapsules, as well as for further details on the operation is on the pamphlets WO 2009/074284 A2 and WO 2012/130370 A1 Reference is made, the disclosure of which is included in the present description in this regard. In the cited references, the magnetically alignable pigments of the present description are often referred to as "effect pigments". The disclosure therein for magnetically orientable effect pigments also applies to the magnetically alignable pigments of the present description.

The color contrast of the microcapsule layer and thus also the color contrast of the magnetic display can be improved by an undercoating, for example in black, brown or dark violet, arranged below the microcapsule layer in the viewing direction. In all cases, a transparent or translucent effect layer may additionally be provided in the viewing direction above the microcapsule layer, which is advantageously designed to be optically variable.

In all designs, the microcapsule layer may contain not only the microcapsules but also admixtures of colored pigments or effect pigments, in particular of transparent or semitransparent effect pigments. Furthermore, at least one of the layers mentioned (background layer, microcapsule layer, effect layer) can be provided with a laser-sensitive additive, in particular with laser markers or IR absorbers for the ablation of color mixtures. The said layers of the magnetic display can each occupy different surface areas of the security element, have different designs and also contain supplementary designs or information.

In all configurations, the magnetic display of the security element is advantageously arranged on an at least partially transparent substrate region, for example a window of a polymer note or a window in a hybrid substrate or paper substrate. The magnetic display can also be arranged in a partially flat watermark, which can be paper-made or printed, or it can be printed on a paper-based value document or a polymer-based value document with a partially thinner opaque coating, or, in particular card-based materials, with a partial recess be applied by opaque films. Further advantageous embodiments of security elements with microcapsules with magnetically alignable pigments can the publications WO 2013/013807 A1 and DE 10 2012 024 082.1 are removed, the disclosure of which is included in the present description.

In an advantageous embodiment of the safety arrangement, the security element and the decoder element are arranged one above the other and firmly connected to each other, so that the magnetically alignable pigments the microcapsules of the security element are magnetically pre-aligned by the hard magnetic material of the decoder element.

Alternatively and also advantageous in a security arrangement, the security element and the decoder element are arranged at different locations of a data carrier that the security element and the decoder element by bending, folding, kinking or flaps of the data carrier are superimposed and the magnetically alignable pigments of the microcapsules of the security element in superimposed state are magnetically pre-aligned by the hard magnetic material of the decoder element.

Advantageously, the decoder element has a substrate, wherein the magnetic region is present in a cavity or in a surface coating of the substrate. The magnetic region of the decoder element can thus be present both on the surface and in a cavity of the substrate, or can also be applied in partial regions of the regions mentioned. Exemplary concrete embodiments are described in more detail below.

Particularly suitable as substrate of the decoder element are paper-based substrates, paper-based substrates with admixtures of polymer fibers, hybrid substrates of a film core and laminated paper layers or with a paper core with laminated film layers, polymer substrates such as BOPP in banknotes, or laminated film layers or monolayers, for example of PVC or polycarbonate , for card-based bodies, such as those used for identification cards or credit cards.

The magnetic material of the magnetic region may contain a magnetizable or premagnetized substance, mixtures of different magnetizable substances or even several layers of different magnetizable or premagnetized substances. The magnetic region has, in particular, a hard magnetic material of high coercive force in order to avoid demagnetization or reverse magnetization by external magnets in circulation. The coercive field strength of the magnetic materials used is more than 50 kA / m, preferably even more than 100 kA / m. Particularly preferred hard magnetic materials are barium and strontium ferrite pigments having coercivities of about 100 kA / m to 200 kA / m, samarium cobalt-based pigments having coercive strengths of about 700 kA / m to 2500 kA / m and neodymium-iron-boron -based pigments with coercivities of about 700 kA / m to 3000 kA / m. In addition, other high-coercive magnetic materials, such as samarium-iron-nitrogen, for the magnetic range of the decoder element come into consideration.

The magnetic materials mentioned are preferably used in the form of anisotropic magnetic pigments, in particular if the materials are still aligned after application in a magnetic field. The term "anisotropic magnetic pigments" does not necessarily refer only to geometrical anisotropy, since in the context of the present invention, above all, the magnetic anisotropy of the pigments is of importance. For example, a grain of a magnetic pigment may be almost spherical and thus geometrically approximately isotropic, yet have a magnetic anisotropy based on the crystal structure and sufficiently large for the invention.

The magnetic region of the decoder element may consist of a single contiguous surface area, but will typically consist of several subareas to represent a more complex motif. Gaps in the surface areas or between the partial areas of the magnetic area may be filled with a non-magnetic dummy material. Depending on the application, the blank material may have the same or a different color tone than the magnetic material. In the former case, the information to be magnetically verified is visually camouflaged in the magnetic domain, whereas in the latter case it is openly visible.

In advantageous embodiments, the magnetic region of the decoder element can also have partial regions of different thickness and contain further information about the resulting additional partial regions with different magnetic field strength. The areas of different layer thickness can be produced, for example, by filling an opening in the decoder element, which has already been provided in some areas with a dummy material. Alternatively or additionally, different layer thicknesses in the magnetic material can also be produced by embossing. It is also conceivable according to another variant to emboss the substrate and thereby to create a depression (cavity) in the substrate which has different depths. The embossing can be done with advantage with a suitable embossing tool, especially in gravure and most preferably in intaglio. The depression with regions of different embossing depth is then filled with the magnetic material, so that likewise different layer thicknesses result in the magnetic material. Due to the different layer thicknesses of the magnetic material, the magnetic region of the decoder shows an image of the depression with the different embossing depths.

In further advantageous embodiments, the magnetic region of the decoder element is structured by material removal by means of laser irradiation.
The removal of material by applying the magnetic region of the decoder element with laser radiation can be configured, for example, as a laser treatment, laser ablation, laser erosion or laser exposure. Furthermore, a photochemically induced and / or thermally induced reaction can be caused by the action of the laser radiation on the magnetic region of the decoder element. Irrespective of which term is used for the effect of the laser radiation on the magnetic region of the decoder element, structuring of the magnetic region of the decoder element must be effected by the laser radiation. The removal of material can be made variable in height and surface, resulting in different thickness profiles and / or area sizes.

The magnetic region of the decoder element may, according to a further advantageous embodiment, also have a plurality of subregions, wherein hard magnetic materials having different coercive field strengths and / or different remanence are arranged in at least two subregions. In the simplest case, therefore, the magnetic area has two partial areas, the first partial area being e.g. a hard magnetic material having a first coercive force and the second portion having a hard magnetic material having a second coercive force different from the first coercive force. The advantage of such designs is that the information or coding characteristic of the magnetic region of the decoder element can be changed by means of a suitable magnetizing device.

An example of such an application would be a transport security of valuables, in particular value documents, such as banknotes, Passports and card-shaped passports, which are equipped with a decoder element with areas of different coercive force and a first characteristic coding for transport. At a later point in time, for example when the valuables, in particular banknotes, arrive at a central bank, further information or coding is generated in the magnetic area of the decoder by means of a suitable magnetizing device, which may be a hard magnet, eg by deleting the information in the or the portions of the decoder element in which the magnetic materials are arranged with lower coercive force. As a result, the possibility is created by such a design with partial areas with different coercive field strength to replace a first information of the decoder element by a second, different from the first information information. If the decoder element has more than two subregions with more than two materials of different coercive field strength, more than two pieces of information can even be generated in the decoder element in this way.

The subregions of the decoder element with materials of different coercive force can advantageously be arranged next to one another, as will be explained in greater detail below.

It is understood that the provision of two partial areas with different magnetic field strength, a digital information change on the magnetic display for the viewer can be generated, while the providence of very many sections with different magnetic field strength also allows a multi-level, ideally stepless information change. This can be achieved, for example, by embossing the substrate in the form of a depression with a continuously varying embossing depth and then filling with the magnetic material. As a result, a "magnetic watermark" arises, ie the information in the magnetic display formed by placing such a decoder element has a similarity to a watermark conventionally provided in paper-based substrates.

Furthermore, it should be noted at this point that the information contained in the magnetic region of the decoder element by means of a suitable sensor is machine readable and thus the machine detection basically accessible.

In an advantageous embodiment, it is provided that the magnetic region is present in the decoder element in the form of a desired QR code or another one-dimensional or two-dimensional bar code. The magnet region then generates the QR code or other bar code in the magnetic display of the security element in a planar representation or in edge representation when the decoder element and security element are arranged one above the other.

The application of the blank material can be effected, for example, by means of printing processes, preferably by screen printing, inkjet printing or with a nozzle system.

In an advantageous embodiment, the magnetic region consists of a sintered metal plate / foil. Alternatively, the magnetic region may consist of a coating of a binder matrix with magnetic pigments or of a polymer with admixed magnetic pigments. In the former variant, the metal platelets can be fixed on a carrier tape and then by means of adhesive via a suitable application machine be applied to a target substrate. In this case, the hard magnetic material has preferably already been premagnetized and oriented during the production process. In the second-mentioned variant, the hard-magnetic material is applied, for example, in the form of a printing ink or an extruder process.

In some embodiments, it is advantageous to visually disguise the magnetic region of the decoder element by a cover layer. The cover layer can consist of several partial layers and be formed for example by opaque printing inks, such as metallic colors or effect colors, or by film elements, such as hologram films. The capping layer may contain additional feature properties, such as predetermined IR absorption properties, luminescence and / or additional magnetic properties.

The magnetic material in the magnetic region is in the form of patterns, lines, characters or an encoding and forms a motif that can be visually displayed by the magnetic display of the security element recognizable. The motif may be, for example, an image motif, such as a coat of arms, a country name, a value or the like. Advantageously, this motif is also found elsewhere in the data carrier on which the magnet region is arranged, and thus creates a further verification option by comparing the two occurrences of the motif. The motif can also be an existing information supplemental pictorial or alphanumeric information.

For example, since many value documents contain batch information, the motif of the magnetic region of the decoder element can also be an output date, a printing date or additional information from the manufacturer, such as a printing company.

Finally, the magnetic region of the decoder element as a motif can also represent individualized information. The individualized information may be, for example, the digit or a part of the digit on a value document. This may also be an interpreted digit, such as a quantitative pictorial representation, a conversion of a number in writing, or a translation of Roman numerals into Arabic numerals.

• S) ein Sicherheitselement mit einem Magnetdisplay mit einer mikrokapselbasierten Farbschicht erzeugt wird, welche in einem Bindemittel eine Vielzahl von Mikrokapseln enthält, die jeweils eine Kapselhülle, eine in der Kapselhülle eingeschlossene Trägerflüssigkeit und ein magnetisch ausrichtbares, plättchenförmiges Pigment aufweisen, welches in der Mikrokapsel im Wesentlichen frei drehbar und durch ein externes Magnetfeld reversibel ausrichtbar ist,
• D) ein Decoderelement mit einem Magnetbereich erzeugt wird, in dem hartmagnetisches Material mit einer Koerzitivfeldstärke von mehr als 50 kA/m in Form von Mustern, Linien, Zeichen oder einer Codierung vorliegt,

wobei in übereinander angeordnetem Zustand von Sicherheitselement und Decoderelement die magnetisch ausrichtbaren Pigmente der Mikrokapseln des Sicherheitselements durch das hartmagnetische Material des Decoderelements magnetisch vorausgerichtet werden.The invention also includes a method for producing a security arrangement for securing valuables in the

• S) a security element having a magnetic display with a microcapsule-based ink layer is produced which contains in a binder a multiplicity of microcapsules each having a capsule shell, a carrier liquid enclosed in the capsule shell and a magnetically alignable, platelet-shaped pigment substantially in the microcapsule freely rotatable and reversibly alignable by an external magnetic field,
• D) a decoder element is produced having a magnetic region in which hard magnetic material having a coercive force of more than 50 kA / m is in the form of patterns, lines, characters or an encoding,

wherein in superimposed state of security element and decoder element, the magnetically alignable pigments of the microcapsules of the security element are magnetically pre-aligned by the hard magnetic material of the decoder element.

In the above method, the hard magnetic material of the magnetic portion is preferably oriented by applying an external magnetic field and fixed in the oriented position.

The fixation is preferably carried out by applying a magnetic field during or shortly after a pressure and / or temperature or UV irradiation. Alignment can also be achieved by melting, aligning in the magnetic field, and then allowing the binder matrix to cool.

• B1) Dispersionsbindemittel: Diese Bindemittel bestehen aus einer meist wässrigen Dispersion. Durch Verdunsten oder Wegschlagen des Wassers und/ oder durch Änderung der pH-Wertes können die Partikel der Dispersion agglomerieren und bilden bei Zimmer- oder auch leicht erhöhter Temperatur einen beständigen Film, in welche die Pigmente eingebettet werden. Vor Beginn und auch noch in der Anfangsphase der Filmbildung sind die magnetischen Pigmente noch hinreichend beweglich, um in einem Magnetfeld ausgerichtet werden zu können.
• B2) Schmelzbare Bindemittel: Die Bindemittelmatrix ist thermoplastisch und kann durch Wärme immer wieder aufgeschmolzen werden. Derartige Systeme finden z.B. in Schmelzklebern Anwendung. Während bzw. nach dem Aufschmelzen können eingebettete magnetische Pigmente im Magnetfeld ausgerichtet werden.
• B3) Strahlenhärtende Bindemittel: Hierbei handelt es sich bevorzugt um Mischungen aus Mono- und Oligomeren mit langkettigen, polymeren Harzen, die chemisch vernetzbar sind. Bevorzugt findet die Vernetzung nach einem radikalischen oder kationischen Kettenmechanismus statt.
• B4) Oxidativ trocknende Bindemittel: Derartige Bindemittel bestehen meist aus einer Mischung von verschiedenen (Alkyd-) Harzen und/ oder Pflanzenölen und/ oder Mineralölen. Durch einen häufig vorhandenen Anteil an Mineralöl, das verdunstet bzw. in den Bedruckstoff wegschlägt, findet eine physikalische Trocknung statt, die dazu führt, die Viskosität des Bindemittels innerhalb relativ kurzer Zeit nach der Applikation ansteigen zu lassen. Die eigentliche Härtung/Vernetzung findet nur langsam unter Sauerstoffeinwirkung und meist unter Zuhilfenahme eines Trocknungsmittels, beispielsweise eines Metallsalzes statt.
• B5) Dispersionsbindemittel und strahlenhärtende Bindemittel: Diese Gruppe von Bindemitteln besitzt an den einzelnen Partikeln der Dispersion (siehe B1) noch strahlenvernetzbare Gruppen, wie etwa Acrylatfunktionen, die nach der eigentlichen Filmbildung eine dauerhafte Fixierung ermöglichen.
• B6) Schmelzbare und strahlenhärtende Bindemittel: Bei dieser Form handelt es sich um Bindemitteltypen, die ähnlich wie die thermoplastischen Systeme reversibel aufschmelzbar sind, aber zusätzlich durch chemische Gruppen im Molekülgerüst und/ oder durch Substanzen in der Bindemittelmischung in der Lage sind, abschließend irreversibel zu vernetzen.

Hereinafter, some advantageous binder types for the microcapsule-based ink layer are called and their operation briefly described. Depending on the process used, the nature of the magnetization and the pigment, the person skilled in the art can select a suitable binder according to this information.

• B1) Dispersion binder: These binders consist of a mostly aqueous dispersion. By evaporating or breaking off the water and / or by changing the pH, the particles of the dispersion can agglomerate and form at room or slightly elevated temperature a durable film in which the pigments are embedded. Before and even in the initial phase of film formation, the magnetic pigments are still sufficiently mobile to be aligned in a magnetic field.
• B2) Meltable binders: The binder matrix is thermoplastic and can be repeatedly melted by heat. Such systems are used, for example, in hot melt adhesives. During or after melting, embedded magnetic pigments can be aligned in the magnetic field.
• B3) Radiation-curing binders: These are preferably mixtures of mono- and oligomers with long-chain, polymeric resins which are chemically crosslinkable. Preferably, the crosslinking takes place according to a radical or cationic chain mechanism.
• B4) Oxidatively drying binders: Such binders usually consist of a mixture of different (alkyd) resins and / or vegetable oils and / or mineral oils. Due to a frequently existing proportion of mineral oil which evaporates or repels into the printing material, a physical drying takes place, which leads to increase the viscosity of the binder within a relatively short time after application. The actual curing / crosslinking takes place only slowly under the action of oxygen and usually with the aid of a drying agent, for example a metal salt.
• B5) Disperse binders and radiation-curing binders: This group of binders still has radiation-crosslinkable groups on the individual particles of the dispersion (see B1), such as acrylate functions, which enable permanent fixation after the actual film formation.
• B6) Meltable and radiation - curing binders: This type of binder is a type of binder which, like the thermoplastic systems, can be reversibly melted, but additionally by chemical groups in the Molecular framework and / or by substances in the binder mixture are able to finally irreversibly cross-link.

The magnetic field strength of the magnetizable or already magnetized material of the magnetic region can also be optimized by a sintering process, since the particles contract closer together through the sintering process.

In an advantageous development, the magnetic region of the decoder element is premagnetized. The biasing and the partial alignment of the magnetic pigments is an expedient variant in order to optimize the strength and function of the magnetic region. This procedure also leads to the fact that the magnetization always comes to lie in one direction.

The pre-magnetization of the decoder also for orientation of the magnetizable substances is carried out in films or magnetic plates typically directly from the manufacturer of the materials, for example by rolling or pressing in the magnetic field, optionally with a connected sintering step.

• A1) Bei einer Ausrichtung im Impulsmagnetfeld werden Magnetpigmente beispielsweise in einer Bindemittelmatrix auf Druckbogen aufgebracht. Durch Magnetisierungsspulen, die über bzw. unter den Druckbogen bzw. Stapeln derselben angebracht werden, kann eine hohe Feldstärke erzeugt werden. Vorteile dieses Verfahrens sind Schnelligkeit, Stapeleignung, und die Eignung für sehr hochkoerzitive Pigmente. Es ist zwar apparativ aufwendig, die Effizienz der Ausrichtung kann jedoch durch mehrere Pulse gesteigert werden.
• A2) Bei einer Ausrichtung im statischen Feld über einen längeren Zeitraum werden Magnetpigmente beispielsweise in einer oxidativ trocknenden Stichtiefdruckfarbe aufgebracht. Druckbogen in kleineren Stapeln von etwa 10 cm Höhe werden während der Trocknung über mehrere Stunden einem starken Magnetfeld ausgesetzt. Vorteile dieses Verfahrens sind die Energieeffizienz, insbesondere bei der Verwendung von Dauermagneten, und die Möglichkeit, das statische Feld über einen längeren Zeitraum anzulegen. Das Verfahren wird vorteilhaft bei langsam härtenden Bindemitteln, wie etwa oxidativ trocknenden Bindemitteln, und bei hochviskosen Bindemittelsystemen, wie etwa einer Stichtiefdruckfarbe, eingesetzt. Das Verfahren ist allerdings für hochkoerzitive Pigmente nur bedingt geeignet und ist auch nur bedingt stapelgeeignet.
• A3) Bei einer Ausrichtung mit Permanentmagneten werden Magnetpigmente beispielsweise in einer mit UV-Strahlung härtenden Farbe aufgebracht. Direkt unter bzw. unmittelbar nach der UV-Härtungseinrichtung befindet sich an geeigneter Position ein Permanentmagnet mit hoher Flussdichte, der die Magnetpigmente ausrichtet während das Bindemittel aushärtet. Dieses Verfahren ist bei schnell härtenden Bindemitteln, wie etwa strahlenhärtenden Formulierungen bevorzugt. Der Permanentmagnet ist vorzugsweise in unmittelbarer Nähe zur Strahlenquelle angeordnet, auch sind längliche Formen der Permanentmagneten vorteilhaft, deren lange Achse sich in Papierlaufrichtung erstreckt.

In the other variants, a first magnetization for the orientation of the magnetic pigments can take place immediately after the application and immediately before or during the fixation of the magnetizable substances. Depending on the coercive force, grain size, pigment concentration of the magnetic pigment, viscosity, temperature of the binder and method of application, one of the following alignment variants is preferably selected:

• A1) When aligned in the pulsed magnetic field, magnetic pigments are applied to printed sheets, for example, in a binder matrix. By magnetizing coils, which are mounted above or below the sheets or stacks thereof, a high field strength can be generated. Advantages of this process are speed, batch suitability and suitability for very high coarse pigments. Although it is expensive in terms of apparatus, the efficiency of the alignment can be increased by several pulses.
• A2) When aligned in the static field for a long period of time, magnetic pigments are applied, for example, in an intaglatively drying intaglio printing ink. Sheets in smaller stacks about 10 cm high are exposed to a strong magnetic field during drying for several hours. Advantages of this method are the energy efficiency, especially when using permanent magnets, and the ability to apply the static field over a longer period of time. The process is advantageously used in slow-setting binders, such as oxidatively drying binders, and in high-viscosity binder systems, such as intaglio inks. However, the process is only conditionally suitable for high-coarse pigments and is also only suitable for stacking.
• A3) When aligned with permanent magnets, magnetic pigments are applied, for example, in a UV-curable ink. Directly below or immediately after the UV curing device is located at a suitable position, a permanent magnet with high flux density, which aligns the magnetic pigments while the binder cures. This method is preferred for fast curing binders such as radiation curable formulations. The permanent magnet is preferably in arranged in the immediate vicinity of the radiation source, also elongated forms of the permanent magnets are advantageous, the long axis extending in the paper direction.

An expedient final magnetization is preferably carried out as a batch process in the form of packets of data carriers, for example of banknote packets by means of impact or pulse magnetization, or in batches by in-line positioning of a strong permanent magnet positioned in a suitable manner. When using isotropic magnetic pigments or when using anisotropic magnetic pigments without alignment / bias, final magnetization is particularly preferred. In pre-alignment with high flux densities often no final magnetization is necessary.

The invention also encompasses a data carrier with a security arrangement of the abovementioned type, in which the security element and the decoder element are arranged one above the other on the data carrier and firmly connected to one another. The invention further comprises a data carrier with a security arrangement of the above-mentioned type, in which the security element and the decoder element are geometrically arranged on the data carrier so that the security element can be brought over the decoder element by bending, folding, folding or folding the data carrier. In this case, the magnetic display of the security element is arranged with particular advantage over a window region of the data carrier, so that after superimposing the security element and the decoder element, the magnetic display can be seen through the window area. The term "window area" includes transparent or translucent areas as well as through openings of the data carrier.

In all configurations, it can be advantageously provided that the shape of the magnetic region of the decoder element forms a motif which is repeated elsewhere in the data carrier, in particular in the form of an imprint, the motif preferably comprising a coat of arms, a country designation, a currency designation or a value number is. By this measure, an additional protection against counterfeiting is created, since the user can compare the motif displayed in the magnetic display with the motif provided elsewhere in the data carrier during verification and close it in agreement on the authenticity of the data carrier.

In all described embodiments, an external magnet can be placed under the two superimposed elements for verification of the safety arrangement in the superposed state of security element and decoder element. Without the external magnet, the motif of the magnetic area of the decoder element is displayed in the magnetic display of the security element. The additional external magnetic field of the external magnet superimposes the magnetic field of the magnetic area and thereby partially or completely destroys the motif-oriented orientation of the magnetic pigments in the microcapsules. If the external magnet is removed again, the motive of the magnetic field is restored after a short time because of the free rotation of the reversibly alignable pigments in the magnetic capsules. As external magnets for this type of verification are in particular the permanent magnets of portable or stationary devices, such as a mobile phone, a portable computer, a portable audio and / or video player or a merchandise security system in question. The external magnet may be provided in both mobile and non-mobile devices.

The carrier liquid of the microcapsules may also be provided with a mobility-reducing additive which reduces the mobility of the pigments in the capsules. Such an additive may for example consist of a small amount of a component which can be crosslinked by external excitation (for example UV radiation) or else in surface-active substances. In a weak magnetic field, the encapsulated pigments in such microcapsules then show only very little or even no mobility. Due to a strong magnetic field such a mobility barrier can be destroyed and thus permanently removed. This makes it possible to carry out the activation process of the microcapsules only well after the production of the security element.

In all variants, the decoder element can be arranged in a film element in a window region of a data carrier. If the security element to be tested is then placed on the back of the window, due to the relatively large distance in the magnetic display, only a weak magnetic field acts and a low-contrast and not completely sharp appearance is created. If the security element and the decoder element are pressed together by the user in the window area, for example with two fingers of one hand, the two elements approach or even come to rest in partial areas. The flux density of the magnetic field increases significantly in the magnetic display, so that now a sharp and high-contrast image is displayed. Due to the elasticity of the film element, the original appearance is restored after releasing. The process can be repeated as desired.

Further embodiments and advantages of the invention will be explained below with reference to the figures, in the representation thereof to a scale and proportioned reproduction has been omitted in order to increase the clarity.

Fig.1

eine schematische Darstellung einer erfindungsgemäß Sicherheitsanordnung zur Erläuterung des Grundprinzips der Erfindung,

Fig. 2

ein Ausführungsbeispiel einer erfindungsgemäßen Sicherheitsanordnung, bei dem das Sicherheitselement und das Decoderelement fest miteinander verbunden sind,

Fig. 3 bis 7

verschiedene Ausführungsbeispiele für Decoderelemente erfindungsgemäßer Sicherheitsanordnungen,

Fig. 8

eine Banknote mit einer erfindungsgemäßen Sicherheitsanordnung, bei der das Sicherheitselement und das Decoderelement fest miteinander verbunden sind,

Fig. 9

eine Banknote mit einer erfindungsgemäßen Sicherheitsanordnung, bei der das Sicherheitselement und das Decoderelement voneinander beabstandet aufgebracht sind, in (a) im ungefalteten Zustand und in (b) im gefaltetem Zustand,

Fig. 10

ein weiteres Ausführungsbeispiel einer Banknote mit einer erfindungsgemäßen Sicherheitsanordnung, in (a) im ungefalteten Zustand und in (b) im gefalteten Zustand,

Fig. 11

die Banknote der Fig. 10 in Aufsicht, in (a) im ungefalteten Zustand und in (b) im gefalteten Zustand,

Fig. 12

ein weiteres Ausführungsbeispiel einer Banknote mit einer erfindungsgemäßen Sicherheitsanordnung, in (a) im ungefalteten Zustand, in (b) im einmal gefalteten Zustand und in (c) im zweimal gefalteten Zustand,

Fig. 13

in (a) eine Identifikationskarte mit dem Sicherheitselement und dem Decoderelement einer erfindungsgemäßen Sicherheitsanordnung und in (b) zwei übereinandergelegte und gegeneinander um 180° gedrehte Identifikationskarten von (a) im Querschnitt,

Fig. 14

ein weiteres Ausführungsbeispiel einer erfindungsgemäßen Sicherheitsanordnung, wobei (a) schematisch das Decoderelement im Querschnitt zeigt, (b) schematisch nur den strukturierten Magnetbereich des Decoderelements von (a) zeigt und (c) das Erscheinungsbild bei aufgelegtem Magnetdisplay in invertierter Darstellung zeigt, und

Fig. 15

eine Abwandlung des Decoderelements der Fig. 14(a) im Querschnitt.

Show it:

Fig.1

a schematic representation of an inventive safety arrangement to explain the basic principle of the invention,

Fig. 2

An embodiment of a security arrangement according to the invention, in which the security element and the decoder element are firmly connected to each other,

Fig. 3 to 7

various embodiments of decoder elements according to the invention safety arrangements,

Fig. 8

a banknote having a security arrangement according to the invention, in which the security element and the decoder element are firmly connected to one another,

Fig. 9

a banknote having a security arrangement according to the invention, in which the security element and the decoder element are applied spaced from one another, in (a) in the unfolded state and in (b) in the folded state,

Fig. 10

a further embodiment of a banknote with a security arrangement according to the invention, in (a) in the unfolded state and in (b) in the folded state,

Fig. 11

the banknote of Fig. 10 in plan view, in (a) in the unfolded state and in (b) in the folded state,

Fig. 12

a further embodiment of a banknote with a security arrangement according to the invention, in (a) in the unfolded state, in (b) in the once folded state and in (c) in the twice folded state,

Fig. 13

in (a) an identification card with the security element and the decoder element of a security arrangement according to the invention and in (b) two superimposed and mutually rotated by 180 ° identification cards of (a) in cross-section,

Fig. 14

a further embodiment of a safety arrangement according to the invention, wherein (a) schematically shows the decoder element in cross-section, (b) shows schematically only the structured magnetic region of the decoder element of (a) and (c) shows the appearance in inverted display when the magnetic display is on, and

Fig. 15

a modification of the decoder element of Fig. 14 (a) in cross section.

The invention will now be described by the example of security arrangements for valuables, such as banknotes or other value documents. The basic principle of inventive designs is in the Fig. 1 illustrating a security arrangement 10 with a security element 12 and a decoder element 14. The security element 12 is typically Part of a data carrier to be secured, for example a banknote or other document of value, and containing a magnetic display 16 of the above type, which contains a plurality of microcapsules, each having a capsule shell, a carrier liquid enclosed in the capsule shell and a magnetically alignable, platelet-shaped pigment, which is substantially freely rotatable in the microcapsule and reversibly alignable by an external magnetic field.

The decoder element 14 of the safety arrangement 10 can be present on the same data carrier as the security element 12, but it can also be part of another data carrier, or be present as a separate decoder element, which serves only to verify the security element 12. In any case, the decoder element 14 has a magnetic region 18 in which hard magnetic material with a coercive force of more than 50 kA / m is in the form of patterns, lines, characters or an encoding.

In the superimposed state of security element 12 and decoder element 14, the magnetically orientable pigments of the microcapsules of the security element are magnetically pre-aligned by the hard magnetic material of the decoder element in the motif form of the magnetic region 18. As explained in more detail below, the security element 12 and the decoder element 14 can be firmly connected to one another, for example, in the superimposed state, or the security element and the decoder element can be brought into a superimposed configuration by a bending, folding, folding or folding process of a data carrier become. The security element 12 and the decoder element 14 may also be present on different data carriers or as separate elements and by superimposing in the in Fig. 1 shown superimposed configuration can be brought.

A particular advantage of the described superposition of security element 12 and decoder element 14 is that the hard magnetic material of the decoder element 14 optimally pre-aligns the magnetic pigments of the magnetic display 16 in the form of the desired motif so that the magnetic display 16 shows a visually perceptible motif to a viewer 22.

If now an external magnet 20, for example a permanent magnet of a loudspeaker of a mobile phone, placed under the arrangement of security element 12 and decoder element 14, the strong magnetic field of the permanent magnet 20 superimposed on the magnetic field of the decoder element 14, so that the motive displayed by the magnetic display 16 strong is changed or even completely disappears. If the external magnet 20 is removed again, the initial state with the visually perceptible motif is restored after a short time due to the free rotation of the reversibly alignable pigments in the magnetic capsules. In addition to the visual attractiveness of the motif already visible in the initial state, the advance direction by the decoder element 14 also leads to an increased light / dark contrast of the magnetic display 16 during the verification by the external magnet 20.

Due to the high coercive force of the magnetic material of the magnetic region 18, it is technically almost impossible to demagnetize or re-magnetize the magnetic material after its magnetization without destroying the decoder element 14. In particular, in designs in which the security element 12 and the decoder element 14 are arranged on the same data carrier, a nondestructive manipulation of the magnetic region 18 of the data carrier is therefore practically impossible.

Fig. 2 shows a concrete embodiment of a security arrangement 10, in which the security element 12 and the decoder element 14 are firmly connected to each other. The security element 12 in the exemplary embodiment comprises a magnetic display 16 with a background layer 30, which is held in a dark, for example, dark violet color, with a microcapsule-based ink layer 32, which in addition to a free-radically curing UV binder in particular a plurality of microcapsules 34 with a self not shown , reversibly magnetically alignable pigment, and having an optically variable effect layer 36 applied to the microcapsule-based ink layer 32 and containing a plurality of optically variable interference pigments 38 in a binder. The interference pigments 38 have, for example, a color shift effect with an attractive color change from green when viewed perpendicularly to blue when viewed obliquely.

The decoder element 14 contains a paper-based substrate 40 with a window region 42 with a through-opening which is closed on one side with a cover layer 44. In order to generate the magnetic region 45, the opening in the substrate 40 is filled on the one hand with the high coercive force hard magnetic material 46 and on the other hand with a nonmagnetic dummy material 48. Due to the shape and arrangement of the material regions 46, 48, the desired motif of the magnetic region 45 of the decoder element 14 is formed. The sequence of magnetic material 46 and non-magnetic material 48 creates a spatially varying magnetic field on the front surface 50 of the decoder element 14, resulting in a corresponding spatially varying orientation of the magnetic pigments in the magnetic capsules of the security element 12, thereby producing the visually perceptible motif of the magnetic display 16 ,

Both for the security element 12 and for the decoder element 14, a number of modifications and alternative designs come into consideration, which have already been described above in general form. To further illustrate the invention will now be with reference to FIGS. 3 to 7 some concrete, non-limiting examples of the decoder element 14 according to the invention safety arrangements in more detail. The described decoder elements can be combined with any of the above-mentioned security elements with magnetic display to form a security arrangement according to the invention.

Fig. 3 shows a decoder element 60, which like the decoder element 14 of Fig. 2 a paper-based substrate 40 having a window portion 42 with a through opening which is closed on one side with a cover layer 44. In contrast to the design of the Fig. 2 For example, the area 48 filled with dummy material on the front side 50 of the decoder element is covered by the magnetic material 46, whereby a magnetic portion of lesser layer thickness 62 and a magnetic portion of greater layer thickness 64 are created in the magnet area 45. In this design, the structure of the magnetic and non-magnetic regions 46, 48 is visually unrecognizable from the front 50 of the decoder element. However, since the magnetic region 45 in the region 62 has a smaller layer thickness, the structure of the magnetic and non-magnetic regions 46, 48 can usually be detected and displayed by the magnetic display 16 of the security element 12. In addition, the magnetic region 45 of the decoder element generates different appearances in the magnetic display 16 of the security element 12 due to the different field line course in each case in the examination of front and back.

In some designs, it may be advantageous to choose the layer thickness in the thinner region 62 to be so large that the magnetic pigments in the microcapsules are already completely aligned by the magnetic field of the thinner region 62. The magnetic display 16 in this case shows no difference in the inspection of the front 50 between the areas 62 and the thicker areas 64. However, here too, a different appearance results when testing the rear side 52 of the decoder element 60, since the magnetic field lines on the front and rear side have different characteristics.

Because of the asymmetry between the top and bottom designs are suitable as in Fig. 3 in particular for safety arrangements in which the security element and the decoder element are not firmly fixed one above the other but can be brought over one another in different orientations.

The design of the decoder element 70 of Fig. 4 corresponds to the design of the decoder element 14 of Fig. 2 , Because of the symmetry of the magnetic material 46 and dummy 48 structure with respect to the substrate plane, the magnetic region 45 of this embodiment has the same magnetic motif on both sides 50, 52 of the decoder element 70. The motif formed by the magnetic region 45 may also be visually visible on the top surface 50 when the magnetic material and the dummy material are selected with different hue. If, on the other hand, the motif is not visually recognizable on both sides 50, 52, a blind material 48 which is the same color as the magnetic material 46 may be selected, and / or the magnet region 45 may also be covered on the upper side 50 with a cover layer 72.

It should be noted here that the provision of a decoder element with partial regions in which materials having different coercive force are arranged, similar to the embodiments according to FIG FIG. 3 and FIG. 4 can be done. In such a case, for example, a first coercive force magnetic material corresponding to the material 46 in FIG Fig. 3 , and a second material having coercive force different from the first coercive force, corresponding to the material numbered 48 in FIG Fig. 3 arranged. Alternatively, the first coercive force material and the second coercive force second material could be the same as the reference numerals 46 and 48 in FIG Fig. 4 be arranged. Of course, the at least two subregions of such a decoder element can also be arranged differently with materials of different coercive force as long as the possibility described above exists of changing the magnetic properties by means of a suitable magnetizing device.

The decoder element 80 of Fig. 5 shows a similar visual and magnetic appearance as the decoder element 60 of FIG Fig. 3 , Unlike the design of the Fig. 3 However, the different layer thickness of the magnetic material 46 is not generated by filling with a dummy material, but by an embossment 82 of the magnetic material 46 itself. The cover layer 44 is thus in this design partially on the back surface 52 of the substrate 40 and partially in the recesses or on the surveys of the embossed structure. Upon inspection of the opposite sides 50, 52 of the decoder element 80, the magnetic display 16 of a security element 12 also exhibits different appearances due to the different spacing of the magnetic material 46 with respect to the magnetic display.

The filling with blind material 48 and the embossment 82 can also be combined, as shown by the decoder element 90 of Fig. 6 illustrated. There, the magnetic material 46 of the magnetic region 45 has different layer thicknesses produced in portions by embossing. The embossing recesses 82 are partially, but not completely filled with dummy material 48. The visual and magnetic appearance of the decoder element 90 largely corresponds to that of the decoder element 80 of FIG Fig. 5 ,

Fig. 7 shows as a further embodiment of the invention, a decoder element 100, the magnetic region 45 is not present in a cavity, but as a printed surface coating of the substrate 40. The magnetic region 45 consists of partial regions with hard magnetic material 46 and partial regions with nonmagnetic dummy material 48 which have been printed on the substrate surface in the form of the desired motif. If the motif formed by the subregions 46, 48 is not to be visually recognizable on the front side 50, the blind material 48 can be selected to be the same color as the magnetic material, or the magnetic region 45 can be visually camouflaged with a cover layer.

Different advantageous possibilities of arranging a security element and a decoder element on data carriers and possibilities for verifying the magnetic display by means of the magnetic region of the decoder element 14 will now be described with reference to FIGS FIGS. 8 to 12 described.

First shows Fig. 8 a banknote 110 having a security arrangement 112 according to the invention comprising a security element 12 having a magnetic display 16 and a decoder element 14 having a magnetic area 18. The security element 12 and the decoder element 14 are shown in FIG Embodiment firmly connected to each other, for example, the magnetic portion 18 of the decoder element 14 may be present in a cavity of the banknote substrate 114 and the magnetic display 16 may be formed by a printed microcapsule-based ink layer. In this variant of the invention, the decoder element 14 is always arranged at least partially below the magnetic display 16. The magnetically alignable pigments of the microcapsules of the security element 12 are therefore magnetically pre-aligned by the hard magnetic material of the decoder element in the motif form of the magnetic region 18, as in connection with Fig. 1 described. The motif of the magnetic region 18 of the decoder element 14 is therefore always present with its attractive visual appearance on the magnetic display 16.

By another external magnetic field of an external magnet 20 (FIG. Fig. 1 ), for example, the hard magnet in the speaker of a mobile phone, the motif of the magnetic region 18 is superimposed by the stronger external magnetic field and destroys the motivic orientation of the magnetic pigments in the microcapsules. Depending on the relative strength of the external magnetic field, the motif of the magnetic region 18 is not at all or only partially recognizable in the presence of the external magnet 20. If the external magnet is removed again, then the motif of the magnetic region 18 sets in again after a short time.

Compared with a magnetic display structured in motif form, the design according to the invention has the particular advantage that no active surface (magnetizable surface) is used up for structuring (inactive region). As a result, the contrast of the motif or an information represented by the magnetic area is significantly increased. Furthermore increases the higher complexity and the falsification of the arrangement.

In the embodiment of Fig. 9 For example, the security element 12 and the decoder element 14 are spaced apart on a banknote 120 such that they can be superimposed by folding 122 the banknote across the centerline 124. Fig. 9 (a) shows the banknote 120 in the unfolded state with spatially separated security element and decoder element. The magnetic pigments of the microcapsules are not aligned in this state, so that the magnetic display 16 indicates no motif. If now the decoder element 14 is brought by folding 122 of the bill under the security element 12, as in Fig. 9 (b) As shown, the magnetically orientable pigments of the microcapsules of the security element 12 are magnetically pre-aligned by the hard magnetic material of the decoder element 14 in the motif shape of the magnetic region 18 and generate the predetermined motif in the magnetic display 16.

It is advantageous if at least one of the subregions of the magnetic display 16 and / or the magnetic region 18 is arranged in a recess of the substrate, in this case approximately the substrate of the banknote 120, since this reduces the spacing of the two regions 16, 18 in the superimposed state and thus a high edge sharpness of the displayed subject and thus a high reading contrast is guaranteed.

As with the design of the Fig. 8 can in the embodiment of Fig. 9 in the folded state, the motif of the magnetic region 18 is superimposed by the external magnetic field of an external magnet 20 and the motif-shaped orientation of the magnetic pigments in the microcapsules are reversibly destroyed.

A particularly advantageous variant is in the FIGS. 10 and 11 shown, where Fig. 10 (a) a banknote 130 with a security arrangement according to the invention in the unfolded state in cross-section and Fig. 10 (b) shows the folded banknote in cross section. In this embodiment, the magnetic display 16 of the security element 12 is arranged above a window area 132 of the banknote 130. Similar to the design of the Fig. 9 For example, the security element 12 and the decoder element 14 are spaced apart on the banknote 130 such that the magnetic display 16 comes to lie on the magnetic region 18 of the decoder element 14 by folding the banknote at the center line 134. The motif created by the orientation of the magnetic pigments of the microcapsules is then recognizable through the window region 132 of the banknote.

Fig. 11 shows in (a) and (b) the banknote 130 of Fig. 10 in unfolded or folded state in supervision. The magnetic region 18 of the decoder element 14 is in the already in connection with Fig. 3 described in motivational form, here specifically in the form of the value "10" formed. Without aids, the motif of the magnetic region 18 can not be visually recognized, so that it appears to the viewer as a homogeneous surface, as in Fig. 11 (a) shown. Also, the magnetic display 16 appears structureless, since the magnetic pigments are randomly oriented in the microcapsules without aligning magnetic field. The value "10" is encoded in the embodiment not only in the magnetic region 18, but also applied to several other locations of the banknote 130, for example, it is provided as an optically variable imprint 136 on the banknote back.

As in Fig. 10 described, the magnetic display 16 comes to lie by folding the banknote 130 at the center line 134 on the magnetic region 18 of the decoder element 14. Because of the orientation of the magnetic pigments of the microcapsules by the magnetic region 18, the magnetic display 16 in the folded state of the banknote displays the value "10" (reference numeral 138). The observer can now compare the value 138 in the magnetic display with the value 136, which is also visible through the folding, and if this matches, it can conclude the authenticity of the banknote.

A particularly forgery-proof variant is in Fig. 12 shown, where Fig. 12 (a) a banknote 150 in the unfolded state in supervision shows. In this embodiment, the magnetic display 16 of the security element 12 is as in the embodiment according to FIG 10 and FIG. 11 explained above a window area 152 of the banknote 150. In contrast to the design according to 10 and FIG. 11 the banknote 150 has a first decoder element 14 with a first magnetic region in the form of a ring, which in FIG Fig. 12 (a) is symbolized as a uniform dark ring, and a second decoder element 14 with a differently shaped second magnetic region 18 (motif in the form of the value "10"), which in Figure 12 (a) is shown as a uniform hatched area. For visual recognition of the first and second magnetic area by the viewer, reference is made to the comments below. The security element 12 and the first decoder element 14 are arranged on the banknote 150 so that the magnetic display 16 comes to rest on the first magnetic region 18 of the first decoder element 14 by folding (reference symbol 156) of the banknote 150 on the folding line 154. The motif generated by the alignment of the magnetic pigments of the microcapsules is then recognizable through the window area 152 of the banknote 150. In the present case, the first generated motif is a ring 159 as shown in FIG Fig. 12 (b) is shown. In contrast to the embodiment according to 10 and FIG. 11 For example, banknote 150 may be folded a second time for verification due to second decoder element 14 and second magnetic section 18, respectively at fold line 155, denoted by reference numeral 157 in FIG Fig. 12 is shown. The second motif in the form of the value "10" generated by the alignment of the magnetic pigments of the microcapsules by the second decoder element 14 is then likewise recognizable through the window region 152 of the banknote 150, as in FIG Fig. 12 (c) shown.

As related to 10 and FIG. 11 described, the magnetic regions 18 of the first and second decoder element 14 may be formed so that they are visually unrecognizable without tools. It is also conceivable, however, that the magnetic regions 18 of the first and second decoder element can be visually recognized by a viewer without aids. For the in Fig. 12 1, the second magnetic area 18 is designed such that it can not be visually recognized by the viewer, while the first magnetic area 18 can be visually recognized by the viewer as a ring even before the banknote is folded about the folding line 154.

As a result, after the first convolution 156 about the first convolution line 154, the observer can recognize the ring of the first magnetic region also in the magnetic display 16. That is to say, the magnetic display 16, which appears structureless in the unfolded state, now shows as a motif the ring of the first magnetic area of the first decoder element.

If the banknote 150 is folded 157 a second time at the fold line 155, the magnetic display 16 comes to rest on the second magnetic area 18 of the second decoder element 14. Because of the orientation of the magnetic pigments of the microcapsules through the second magnetic region 18, the magnetic display 16 now displays the second motif (value number "10", reference numeral 158) in the doubly folded state of the banknote. That too The first motif, which has become visible to the observer in the form of a ring (reference numeral 159) through the first convolution, can be recognized by the observer in the magnetic display 16, as shown in FIG Fig. 12 (c) is shown. As a result, by the provision of two decoder elements according to Fig. 12 a first and second information in the magnetic display are made visible, which can complement each other with a suitable choice to a new third overall information. For example, instead of the annular motif 159, the first convolution could form a first digit, for example the digit "0", and the second convolution and the laying on of the second decoder element could form the numerical sequence "10" so that the total information would be the value " 100 "would be. Such, obtained by repeated folding total information gives the value document an exceptionally high recognition value and thus a very large protection against counterfeiting.

It is understood that by appropriate arrangement of the decoder elements and the magnetic display, the verification can also be done by bending, bending, flaps, etc. It is of course also possible to arrange the decoder elements and the magnetic display in such a way that a verification can take place at a magnetic display not arranged in a window area of a value document but on the substrate of the value document, as for a magnetic display and only one decoder element in FIG 10 and 11 is explained.

In terms of FIGS. 14 and 15 explained embodiments, the decoder element 160 or 190 generates after placing the security element 12 with the magnetic display 16 there a QR code that can be read with a mobile phone or other suitable scanner. It is understood that the decoder elements can similarly produce other one or two-dimensional barcodes.

This in Fig. 14 (a) schematically illustrated in cross-section decoder element 160 is basically like the decoder element 60 of Fig. 3 However, in the case of the decoder element 160, the magnetic region 162 is formed by a structured high coercive force hard magnetic material 164 whose relief structure 166 has the shape of the desired QR code. Fig. 14 (b) 1 shows a schematic illustration of only the structured magnetic region 162 of the decoder element, in which the black sub-areas represent the elevations 170 and the white sub-areas represent the depressions 172 of the relief structure 166 of the magnetic area 162. The depressions 172 of the relief structure 166 are filled with a nonmagnetic dummy material 174.

The structuring can be produced, for example, by stamping or milling the magnetic material 164. Alternatively, in a substrate 40, for example, a card body, small magnetic elements in the desired arrangement may also be used and fixed in position by pouring a non-magnetic resin or polymer. The nonmagnetic resin or polymer can also be the dummy material. As in Fig. 14 (a) shown, the magnetic region 162 is protected on both sides by a cover layer 44 and camouflaged.

Will now be a security element 12 with a magnetic display 16 ( Fig. 2 ) is applied to the decoder element 160, the structured magnetic region 162 in the magnetic display 16 generates an edge representation 180 of the QR code encoded in the magnetic region 162, as shown in FIG. 2, by the pole jumps at the edges of the elevations 170 or depressions 172 Fig. 14 (c) shown. The black and white representation of the Fig. 14 (c) is inverted for graphical reasons, in practice the edges 182 will appear white against the dark background 184 of the magnetic display 16. This edge presentation 180 can be read and evaluated in the usual way with a mobile phone or other scanner. Due to the existing error tolerance of the QR codes, such a pure edge representation 180 can be reliably recognized and decoded.

In addition to an edge representation 180, in which only the outline edges of the elements of the QR code are displayed in the magnetic display 16, QR codes or other bar codes can also be displayed as filled areas. For this purpose, in the areas which are to appear bright in the magnetic display 16, a plurality of bright individual lines lined up, so that the individual lines complement each other visually to a bright surface.

The design of a corresponding decoder element 190 is shown in FIG Fig. 15 illustrated. The decoder element 190 is basically like the decoder element 160 of Fig. 14 (a) however, the magnetic region 192 of the decoder element 190 has flat partial regions 194 and partial regions 196 with numerous narrow parallel magnetic lines 198. Each of the magnetic lines 198 generates a bright line in the magnetic display 16 as a result of the pole shift in the magnetic field, so that the partial regions 196 appear bright after the magnetic display 16 has been placed on. In the flat partial regions 194, the magnetic field is constant, so that these partial regions appear dark after the magnetic display 16 has been placed on. By a suitable sequence of partial regions 194, 196, therefore, any desired QR code can be imaged in the magnetic region 192.

Another possibility for generating the magnetic regions 162, 192 consists in the use of a structured thin shielding film, for example a linear perforated, approximately 5 .mu.m to 50 .mu.m thick metallic film, which in combination with a homogeneously distributed magnetic Material is used. At the perforated points, the shielding is interrupted by the film, so that there the magnetic field penetrates through the shielding foil and produces a bright line in the applied magnetic display.

In a further variant of the invention, the security element and decoder element to be superimposed for verification are on different data carriers, as in FIG Fig. 13 illustrated This variant is particularly suitable if the data carriers are rigid and not kinking, folding or hinged, such as identification or credit cards. In this case, each of the similar data carriers contains both a security element and a decoder element of a security arrangement according to the invention, but for verification, the security element of a first data carrier must be placed over the decoder element of a second, similar data carrier.

Regarding Fig. 13 (a) For example, the identification cards 140 of a company or authority may contain a security element 12 with a magnetic display 16 in a first area and a decoder element 14 with a magnetic area 18 in a further area. Security element and decoder element are geometrically arranged on the identification cards 140 so that they swap their places by 180 ° when the card is rotated in the map plane. For verification purposes, two such cards 140A and 140B are placed on top of each other rotated through 180 °, as in cross-section Fig. 13 (b) illustrated.

As a result, the security element 12 of the overhead card 140B comes to lie just above the decoder element 14 of the underlying card 140A, so that the motif of the magnetic area 18 in the magnetic display 16 of the security element 12 is displayed. Of course, the role of the top and bottom card can be reversed so that in this way two identification cards 140A, 140B can mutually verify each other.

LIST OF REFERENCE NUMBERS

10

security arrangement

12

security element

14

decoder element

16

magnetic display

18

greeting cards

20

external magnet

30

Background layer

32

microcapsule-based paint layer

34

microcapsules

36

optically variable effect layer

38

interference pigments

40

substratum

42

pane

44

covering

45

greeting cards

46

hard magnetic material

48

blind material

50

front

52

back

60

decoder element

62

magnetic portion of lesser thickness

64

magnetic subregion of larger layer thickness

70

decoder element

72

covering

80

decoder element

82

Verprägung

90

decoder element

100

decoder element

110

bill

112

security arrangement

114

Banknote substrate

120

bill

122

wrinkles

124

center line

130

bill

132

pane

134

center line

136

optically variable imprint

138

formed value

140, 140A, 140B

identification cards

150

bill

152

pane

154, 155

fold line

156, 157

wrinkles

158

formed value

159

formed pattern

160

decoder element

162

greeting cards

164

hard magnetic material

166

relief structure

170

surveys

172

wells

174

blind material

180

edge representation

182

edge

184

dark background

190

decoder element

192

greeting cards

194, 196

subregions

198

magnetic lines

Claims (17)

Security arrangement for safeguarding valuables, comprising a security element and a decoder element, wherein - The security element has a magnetic display with a microcapsule-based ink layer containing in a binder a plurality of microcapsules, each having a capsule shell, enclosed in the capsule carrier liquid and a magnetically alignable, platelet-shaped pigment, which in the microcapsule substantially freely rotatable and reversibly alignable by an external magnetic field, the decoder element has a magnetic region in which hard magnetic material having a coercive force of more than 50 kA / m is in the form of patterns, lines, characters or a coding, and - In superposed state of security element and decoder element, the magnetically alignable pigments of the microcapsules of the security element are magnetically pre-aligned by the hard magnetic material of the decoder element. Safety arrangement according to claim 1, characterized in that the security element and the decoder element are arranged one above the other and firmly connected to each other, so that the magnetically alignable pigments of the microcapsules of the security element are magnetically pre-aligned by the hard magnetic material of the decoder element. Safety arrangement according to claim 1, characterized in that the security element and the decoder element are arranged at different locations of a data carrier that the security element and the decoder element by bending, folding, kinking or flaps of the data carrier are superimposed and the magnetically alignable pigments of the microcapsules of the Security elements in the superimposed state are magnetically pre-aligned by the hard magnetic material of the decoder element. Safety arrangement according to at least one of claims 1 to 3, characterized in that the decoder element comprises a substrate and the magnetic region is present in a cavity or in a surface coating of the substrate. Safety arrangement according to at least one of claims 1 to 4, characterized in that the magnetic region of the decoder element contains a hard magnetic material having a coercive force of more than 100 kA / m, and in particular barium and strontium ferrite pigments, samarium cobalt-based pigments, neodymium Iron boron based pigments, or samarium iron nitrogen based pigments. Safety arrangement according to at least one of claims 1 to 5, characterized in that the magnetic region of the decoder element contains magnetically anisotropic pigments. Safety arrangement according to at least one of claims 1 to 6, characterized in that the magnetic region of the decoder element consists of several separate subregions and / or contains subregions of different thickness. Safety arrangement according to claim 7, characterized in that gaps between separate subregions or subregions of lesser layer thickness are filled with a non-magnetic blank material, in particular with a blank material which is the same color as the magnetic material. Safety arrangement according to at least one of claims 1 to 8, characterized in that the magnetic region of the decoder element is visually hidden by a cover layer, preferably that the cover layer has additional feature properties, such as IR absorption, luminescence or additional magnetic properties. Safety arrangement according to at least one of claims 1 to 9, characterized in that the magnetic region is formed by a sintered metal plate, by a coating of a binder matrix with magnetic pigments, or by a polymer with admixed magnetic pigments. Safety arrangement according to at least one of claims 1 to 10, characterized in that the magnetic region in the decoder element in the form of a desired QR code or other one or two-dimensional barcode is present, so that the magnetic region in superimposed state the QR code or other barcode generated in the magnetic display of the security element in area or in edge representation. Method for producing a security arrangement for the protection of valuables in the S) a security element having a magnetic display with a microcapsule-based ink layer is produced which contains in a binder a multiplicity of microcapsules each having a capsule shell, a carrier liquid enclosed in the capsule shell and a magnetically alignable, platelet-shaped pigment substantially in the microcapsule freely rotatable and reversibly alignable by an external magnetic field, D) a decoder element is produced having a magnetic region in which hard magnetic material having a coercive force of more than 50 kA / m is in the form of patterns, lines, characters or an encoding, wherein in superimposed state of security element and decoder element, the magnetically alignable pigments of the microcapsules of the security element are magnetically pre-aligned by the hard magnetic material of the decoder element. A method according to claim 12, characterized in that in step D) the hard magnetic material of the magnetic region is oriented by applying an external magnetic field and fixed in the oriented position. A data carrier with a security arrangement according to at least one of claims 1, 2, 4 to 11, in which the security element and the decoder element are arranged one above the other on the data carrier and firmly connected to one another. A data carrier having a security arrangement according to at least one of claims 1, 3 to 11, in which the security element and the decoder element are geometrically arranged on the data carrier such that the security element can be brought over the decoder element by bending, folding, bending or folding the data carrier. A data carrier according to claim 15, characterized in that the magnetic display of the security element is arranged over a window region of the data carrier, so that after superimposing the security element and the decoder element, the magnetic display can be seen through the window region. A data carrier according to at least one of claims 14 to 16, characterized in that the shape of the magnetic region of the decoder element forms a motif that is repeated elsewhere in the data carrier, in particular in the form of an imprint, wherein the motif preferably a coat of arms, a country name, a Currency denomination or a value number.

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