Valuable document with nested within element of authenticity in the form of a transparent thread or tape identification signs

 

(57) Abstract:

The invention relates to computing. Its use in the manufacture of valuable documents (bills, etc) you can get good visually discernible mark of authenticity and additionally provides the property of electrical conductivity for machine reading. This is achieved through the execution of the conductive layer in the element of authenticity, at least in some areas at least partially transparent and placing it under or over signs. 13 C. p. F.-ly, 4 Il.

The invention relates to valuable documents contained in each element of authenticity in the form of a transparent thread or tape, which is visually identifiable mark in the form of a font character, image and the like, and is electrically conductive for mechanical and electrical identification.

To protect valuable documents known location of the elements of authenticity, which are machine-identifiable physical properties and/or visually recognized by a special form that they can serve as a sign of authenticity for valuable document. These elements of authenticity are, for example, threads Alvesta thread of authenticity (application Germany N 1447851), which on both sides with microscopic print images. So you can independently from each other to consider two images, between them there is a layer of aluminum. This layer of aluminum by determining the electrical conductivity may also be indicative of a machine check.

In practice, this form showed a low value, as the thread of authenticity due to the aluminum layer becomes opaque, and the font can be discerned only when illuminated from above with great difficulty. In most cases, it is necessary paper at least during the test to make transparent chemical means.

In addition, micro-printed image threads authentication is superimposed on the external printed image, which in many cases is perceived as a hindrance.

As the threads of the authentication can be performed only up to a certain width without holes during formation of the sheet has already been proposed to incorporate in a piece of porous niti, which then can be made correspondingly wider (application Germany N 2152090). In a particular form of execution described the execution thread of authenticity, which when viewed in the incident and the past through the light shows RIRs viewed this thread, embedded in the paper, in the incident light, the color image is determined by the paint layer lying above the reflective layer of aluminum, while when viewed in transmitted light, the dominant color will be mixed color two color layers. When using such threads there are problems with pestering layers of paint to an intermediate aluminum layer, and in the extreme case, we exfoliation of the outer layer of paint with a metal layer. Although this thread may be determined and machine by its conductivity, this sign is not a reliable indicator of authenticity due to insufficient strength of the harassment of the metal layer along the entire length of the thread. Cracks or partial detachment of the metal layer has lead to the disturbance of the electrical conductivity. Such documents when a machine check is classified as a fake, although they are genuine valuable documents.

Known thread of authenticity, which when clamped in the paper has a very good legible and well scanned text labels (patent EPO N 0279880). This thread contains a transparent medium that is printed signs in the form of several shiny metal micro-printed characters. This thread Beers, distinguishable only the font characters in the form of characters with sharp contours, because the media itself is made transparent. The manufacture of such a filament is produced by steam processing transparencies large surface, in which is deposited a layer of aluminum, after that make printing on the sheet micro-printed characters using acid-resistant ink and then drain regions not covered with paint, and then remain font characters separated from each other on a transparent background.

Although this thread has a distinct visual identity authentication, it loses its conductivity due to the lack of solid aluminum layer and therefore is not suitable for machine authentication.

The objective of the invention to create a suitable for sealing in valuable document element of authenticity in the form of a wire or ribbon, which has a well visually discernible mark of authenticity in the form of the font of the labels or printed pattern, the printed image, etc., and the thread of authenticity additionally as a machine-readable characteristic must have the property of electrical conductivity, reliably and unambiguously continued also after heavy metal impacts on valuable document.

In the famous thread of authenticity, which contain only the conductive layer, cracks in the coating metal are, as a rule, to the fact that the conductivity is interrupted and thus cannot be verified. In the proposed solution, there could be two electrically conductive layers, which are non-conductive layer (plastic film, the adhesive layer and so on), which is the dielectric into the capacitor, the capacitive connection between the metallized layers. The conductivity of the offered yarn is checked not by galvanic contact conductive layer, and due to the capacitive conductivity for high frequency signals. If the metal layers there are cracks, it is, depending on design and testing, similar to the activation of capacitors in series or parallel. When this conductivity for high frequency signal is stored, so that checks can be carried out on the layer with cracks, especially if the cracks are in both cases not the same place. If you measure the conductivity of alternating current, using a known measure of electrical capacity, even if one or more cracks in one or both metal with

One of these conductive layers may be opaque metal layer, which contains cut-outs in the form of font characters. The other conductive layer may be transparent, applied by cathode sputtering layer-type indium oxide tin that is deposited on the same or opposite side of the plastic strip. Because the second conductive layer is transparent, font characters on the first opaque metal layer visible unchanged and with the same quality on both sides.

Instead of the more expensive to manufacture deposited by cathode sputtering of transparent layers can be used, respectively, more thin layers of aluminum (by deposition from the vapor), which, for example, at a concentration of about 20 mg/m2give a sufficiently high surface conductivity and sufficiently transparent to negative font is good to see at least in transmitted light.

However, other strands of authenticity, for example printed threads authentication according to this method, it is possible to make the conductive without significant loss of visual distinctiveness of the printed image. The thread of authenticity may consist of a transparent film carrier, Kotor is imeeetsja opaque ink. This printed image on both sides is covered with a semitransparent metal layer, through which the thread receives the electrical conductivity. In addition, a semi-transparent metal layers due to their reflective properties make them invisible or nearly invisible image in the incident light. So it isn't unpleasant overlay printed on the document image on the image thread of authenticity in incident light.

When performing a semi-transparent layer, you can use a conductive plastic. These translucent plastic can be combined with other identifiable in the light properties.

It is advisable recognizable in transmitted light properties of the thread of authenticity to make recognizable by a machine. Very visible properties of the yarn, such as color or microprinting, when you try machine detection sink in contained in the securities document color finishes. If the proposed thread of authenticity has poluprozrachnymi conductive material, it can be used to "run" the measurement of other properties, i.e., measurement of, for example, color or structured printing is performed exactly at the place where the detected conductivity. That is STV threads authentication possible reliable detection.

Appropriate execution of the invention with machine recognition of the transparency properties of the thread of authenticity, which are not visually perceived, such as the absorption of infrared rays. The absorption of infrared rays by the thread sinks into the various properties of the absorption of infrared light of the valuable document, if the measurement is not performed exactly at the location of the threads of authenticity. Here helps conductivity threads authentication for reliable start measuring other properties.

In the famous thread of authenticity, different visible light conductive printed image, previously accounted for in the case of positive font to completely abandon just held machine by checking the conductivity, in the case of a negative font this property was prone to failures due to mechanical loads, which consequently reduced the value for machine recognition of authenticity.

Because, ragged metal layers have conductivity to AC, can be at least one or more of the conductive layers to perform a raster in the form of, for example, lines, holes or crosses with possibly opaque raster elements. The degree of the t thickness of structure elements of a raster (line widths, etc.,) and coverage pattern (distance between pixels, and so on).

Using the present invention it is possible to follow the thread of authenticity with any of the lettering signs, printing images, etc., without reducing the conductivity. Conductivity after a relatively high loads or when interrupts are still measurable, resulting in increased robustness against failures and the value for automated test systems. In addition to the machine checking this thread authenticity has different visibility of images in transmitted and incident light that it is impossible to simulate alternative activities. Change visible image, thus, is useful for visual control that allows you to verify the authenticity of the document without auxiliary means. If copy is equipped with a thread of authenticity according to the invention securities available for sale of copying equipment, especially the color copying device, the copy will not be properties that provide a machine check, and visual. This thread authenticity is thus reliable protection against copying of the securities.

In Fig. 1 shows a thread of authenticity with a negative sign font in the metal layer; Phi is in Fig.3 thread the authenticity of the printed image and the conductive layers; in Fig.4 the thread of authenticity, made of two films.

In Fig.1 shows thread 1 authentication consisting of a plastic tape 2 made of transparent and high tensile strength plastic material, such as, for example, polyester, one surface of which is provided with an opaque layer 3. This layer preferably is a light-reflecting layer of metal, such as aluminum, which has cutouts 4 in the form of damage to the thread of the character pattern. After sealing the threads in securities that layer to the incident light is not visible, as reflected by the metal layer light again diffuse scatters in the paper. Openings in the opaque layer thus visible only when viewed against the light as the lighter parts. On the rear side of the plastic film deposited electrically conductive layer 5, which is preferably transparent or at least translucent. Transparent conductive layers are, for example, layers of tin oxide-indium, which are applied to the film material of cathode sputtering. Vacuum deposition of such materials on a plastic film known.

In many cases, enough for a thin layer of aluminum deposited from the vapor that is technologically much easier and the Shui transparency for most applications.

In Fig. 2 shows the thread 6 of authenticity, which has a font character 7, consisting of a reflective metal, as, for example, is known from patent EPO N 0279880. Because individual font characters with each other are not connected, the thread containing only such signs, is not electrically conductive along its entire length. According to the invention now this thread is complemented extending over the entire surface of the threads of the conductive layer 8, so as not to interfere with the visibility of the font characters at least partially transparent. The coefficient of transparency of about 50% is usually sufficient to uniquely identify the signs without auxiliary means also embedded in the paper thread. With higher requirements can be applied also completely transparent conductive layers, such as the already mentioned layer of tin oxide-indium done by cathodic sputtering, resistance, for example, 200 Ohms per square. In depicted in Fig.2 strands of authenticity font marks 7 are one and the layer 8 with the other conductive plate. Layer 7 is a layer with a large number of interruptions made intentionally. To improve izmerimosti capacity of font characters are larger space. E the th through.

Instead of fixing the font of characters in the metal layer plastic carrier 10 to the threads 9 of secrecy may bear printed marks caused by typographical method (Fig.3). The seal 11 can contain characters and/or color patterns. Font characters are applied preferably using an opaque ink, so when considering in the light they are visible as dark areas. When color patterns, in contrast, are preferably used transparent colours, so these color patterns in incident light visible only weakly and only in transmitted light enumerated as colored surfaces. To give this thread a property of electrical conductivity, they are on both sides are covered with transparent or translucent conductive layers. If the printed image when considering the document in the incident light must be different from the images on the document itself, for the electrically conductive layer preferably uses a partially reflecting layer of aluminum with a density of about 20 mg/m2or 800 Ohms per square. As for machine control sufficient conductivity 10000 Ohms per square, aluminum layer, if necessary, can be performed much more subtle.

In a special form of COI is in a printed image and/or conductive layers 14. These are protected by a thin and generally sensitive layers (ITO layer, a layer of aluminum, etc.) against wear. Both films are connected by a non-conductive adhesive layer 15. A special advantage of this construction is its symmetry. This thread of authenticity, which in the manufacture of paper is pulled together from the roll and place and put in paper pulp, less prone to the so-called education garlands, i.e. twisting during winding with coils than asymmetrically made the thread. Marriage when using asymmetric yarns by twisting in a layer of paper can thus be avoided.

By placing sensitive layers in the inner part of the thread of authenticity you can use the materials that the prior art cannot be practically used when placing them outside of the thread due to the strong activity on the environment.

1. VALUABLE DOCUMENT WITH nested WITHIN ELEMENT of AUTHENTICITY IN the FORM of a TRANSPARENT THREAD OR TAPE IDENTIFICATION SIGNS, visible in transmitted and is not visible in reflected light, and an element of authenticity provided with a conductive layer, wherein the conductive layer on at least OTDEL.

2. The document under item 1, characterized in that the identification marks on the element of authenticity made in the form of cutouts in one additional opaque conductive layer.

3. The document under item 1, characterized in that the identification marks on the element of authenticity made in the form of additional opaque conductive layer only within the contours of the insignia, electrically isolated from the partially transparent electrically conductive layer.

4. The document under item 1, characterized in that the partially transparent electrically conductive layer deposited on the element of authenticity by ion beam sputtering.

5. The document under item 4, wherein the partially transparent conductive layer is made of oxides of tin and indium.

6. The document under item 1, characterized in that the partially transparent electrically conductive layer deposited on the element of authenticity by spraying metal.

7. The document under item 6, wherein the deposited metal is aluminum.

8. The document under item 7, wherein the aluminum layer has an equivalent density of 20 mg/m2.

9. Document according to any one of paragraphs.1 to 8, characterized in that at meconematinae symbols appear on an element of authenticity printed.

11. The document under item 10, wherein the conductive layer consists of at least two layers, each of which both sides covered deposited on the element authentication tokens.

12. The document under item 11, wherein the conductive layer is made in the form of a partially reflective metallic coating.

13. The document under item 1, characterized in that the conductive layer is made of multiple electrically isolated from other conductive layers.

14. The document under item 13, characterized in that the electrical insulation of the conductive layers is made in the form of the aluminum oxide layer.

 

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