DE60201880T2 - Security device, preferably, a security thread consisting of visually readable characters and magnetic properties, and method for their preparation - Google Patents

Abstract

A security device, preferably a security thread (1) for being incorporated into a document such as a banknote comprises a substrate (2), preferably of a transparent polyester layer; a first layer arranged over the substrate (2) and having negative characters or scripts (3a) incorporated therein; and a magnetic code layer (5) arranged over the first layer and adjacent to the negative characters or scripts (3a), wherein the first layer is a printed ink layer (3). <IMAGE>

Description

The The present invention relates to a safety device and to a method of manufacturing the same. The security device is preferably a security thread with visible negative characters or fonts and as well with a magnetic property. The security thread can in a document such as a banknote will be integrated.

Security threads that partially or completely into a paper substrate of a banknote during the manufacturing process of the paper substrate are commonly used as security devices to check the Authenticity of the banknote used.

one from these conventional ones security threads will be in euro banknotes used. To achieve such a security thread Three methods are applied in combination, which have the following characteristics exhibit:

First, a method of forming negative characters and / or fonts in a continuous Metal layer is used, for example, that first a Base layer of pure aluminum on a polyester substrate so applied is that the aluminum on one of its surfaces on the polyester substrate is applied, and then aluminum parts from the aluminum base demetallised or stripped so that through recesses formed characters or fonts are formed as negative. These characters or writing will be consistent throughout this description as "negative Characters or fonts ". By visually checking such characters and / or fonts against the background light, these appear transparent and are thus readable.

The Presence of the metallic base can be done using a capacitive or inductive circuit can be detected.

Secondly have the conventional ones security threads a magnetic property in the so-called IMT format. The IMT format is realized by that surfaces with modulated lengths and a constant thickness, the length of a single module is constant and defined as greater than zero. These security threads were developed and patented by the Bank of England.

thirdly have the security threads a combination of metallic and magnetic properties as a single security thread.

To the Developing and producing a security thread with the above mentioned Properties are apart from the chemical and physical Knowledge of sophisticated and costly manufacturing processes necessary, since a corrosion problem can occur if a Security thread with magnetic properties on a metallic Base in an aqueous or wet solution introduced which is traditionally used for papermaking. This corrosion can become a Loss of magnetic and / or metallic properties.

Of Another has for The papermaking used water sometimes a diminished quality, it is provided with chlorine, and thereby the production of security threads is complicated.

Another example of a conventional security thread is disclosed in EP-0 516 790 B1 and in 3 shown.

Here, the conventional security thread has a transparent substrate, a metallic layer such as a layer of pure aluminum with negative signs 30a that are integrated in it, and a magnetic layer 50 above or below the metallic layer 10 is arranged, wherein the geometric arrangement of the magnetic layer 50 allows the negative characters 30a are free (in this description, the terms "above" and "below" refer to opposite directions).

The Manufacturing method of such a security thread has a Step of printing an activatable ink on the substrate, a step of applying a metallic layer to the printed one Side of the substrate and a step to activate the ink, so as to remove the ink together with the metal deposited thereon, whereby recesses are formed in the metallic layer. Thus, the negative characters are obtained.

It It is the object of the present invention to provide a permanent security thread with signs visible against the backlight and also areas with coded magnetic properties has, as well as an inexpensive method for producing the same.

These Task is by the safety device according to the invention or by the method of manufacturing the same according to the present invention Invention solved.

According to one aspect of the present invention, a security device, preferably a security thread to be integrated into a document such as a banknote, has Substrate, preferably a transparent polyester layer; a first layer disposed over the substrate and having negative characters or fonts integrated therein; and a magnetic code layer disposed over the first layer in a region adjacent to the negative characters or fonts, the first layer being a printed ink layer. In this way, the costly conventional aluminum layer deposited on the substrate is omitted, and the security device has no metallic background which could cause corrosion problems.

Preferably The magnetic code layer has a specific signal sequence that can be modulated the thickness of the magnetic code layer is formed.

Preferably is a supportive layer disposed between the printed ink layer and the magnetic code layer, being an area the support layer on the side of the magnetic code layer preferably embossed recesses according to the specific Signal sequence has.

Preferably is a cover layer directly above the magnetic code layer is arranged so that the magnetic code layer is protected and smoothed becomes.

Preferably is a hot glue or a coating layer is provided on the side of the substrate, which is opposite to the magnetic code layer, and / or on the side the cover layer opposite to the magnetic code layer, to integrate the security device into a document like for example, to facilitate a banknote.

Preferably consist of the printed ink layer, the support layer and / or the cover layer a gray nitroacryllöslichen Resin-based ink containing less than 5% aluminum powder. Consequently the security device has an outward appearance like a metallic thread, but due to the negligible Aluminum part of the ink has the safety device no metallic Background due to the lack of electrical wiring or due to the lack of heat conduction.

Preferably is the magnetic code layer a printed layer of magnetic ink, which allows easy production of the magnetic code layer.

According to one Second aspect of the present invention is a method for Producing a security device, preferably a security thread intended to be integrated into a document such as a banknote, with the steps of providing a substrate, preferably one transparent polyester layer; for arranging a first layer with negative characters or fonts embedded in it above the substrate; and arranging a magnetic code layer over the first layer in one Area next to or adjacent to the negative characters or fonts, wherein in the step of disposing the first layer, an ink layer printed on the substrate.

Preferably The method further includes steps of printing a support layer over the printed one Ink layer; for embossing of recesses in an area the support layer at the side opposite to the printed ink layer, according to a specific signal sequence of the magnetic code layer, preferably by Embossing rollers; and in the step of arranging the magnetic code layer becomes the magnetic code layer on the embossed area the support layer printed by means of a magnetic ink.

Preferably The method further comprises a step of printing a cover sheet over the sheet Magnetic code layer.

Preferably the method further comprises a step of arranging a Hot adhesive or a coating layer on the side of the substrate that the Magnetic code position is opposite, and / or on the side of the cover layer, the the magnetic code position is opposite.

Preferably The printed ink layer, the support layer and / or the cover layer by means of a gray ink, preferably by means of a nitroacryllöslichen Resin-based ink containing less than 5% aluminum powder having.

Preferably For example, the step of printing the printed ink layer uses the Corona phenomenon.

Other Aspects and advantages of the present invention will become apparent from the following Description in conjunction with the figures described, which preferred embodiment of the present invention.

1 shows a schematic plan view of a safety device according to an embodiment of the present invention;

2 shows a schematic cross-sectional view of the in the 1 shown safety device; and

3 shows a schematic cross-sectional view of a conventional security thread.

As a system for manufacturing a security device according to the invention, such as a security thread 1 to inte in a document such as a banknote (not shown) A conventional intaglio printing machine (not shown), such as used for printing a flexible packaging material, may be used.

The configuration of the security thread according to the invention 1 and the manufacturing process together with the 1 and 2 described in which schematic top and cross-sectional views of the security thread 1 to be shown.

The security thread 1 is formed by a substrate, which is preferably a transparent polyester substrate 2 is.

On the substrate 2 is a printed ink layer 3 arranged the negative characters or fonts 3a which then appear transparent when visually inspected against the backlight.

To the Printing is preferably a nitroacryl-soluble ink based on synthetic resins, containing less than 5% aluminum powder applied at 52 dyne by the corona phenomenon. Because the ink is negligible Contains aluminum content in it, the ink does not conduct electricity or heat. Preferably, the ink is a gray or silver ink.

It should be noted that the printed ink layer 3 not completely through the characters or fonts 3a is covered so that there are free areas 3b that are sufficient to have a magnetic code adjacent to the characters or fonts 3a is arranged, which are applied at a later step.

Within the free areas 3b directly above the printed ink layer 3 is preferably a support layer 4 , It should be noted that the support layer 4 partly only within the free areas 3b adjacent to the scriptures or signs 3a is arranged so that the characters or fonts 3a and the support layer 4 alternately in a longitudinal direction of the security thread 1 are arranged, and the characters or fonts 3a be through the support layer 4 not covered.

Preferably, the support layer 4 also printed by a gray nitroacryllösliche resin-based ink containing less than 5% aluminum powder.

Directly above the support layer 4 is a magnetic code layer 5 arranged. Similar to the support layer 4 is the magnetic code layer 5 partly only within the free areas 3b between the characters or fonts 3a arranged.

The magnetic code layer 5 is preferably by first embossed recesses on a surface of the support layer 4 formed, that of the printed ink layer 3 is opposed, by embossing rollers (not shown). By embossing rollers namely a plurality of recesses with different depths in the support layer 4 configured so that a predetermined signal sequence is generated in which, for example, the recesses have a depth of 100 microns, representing the binary number "1", whereas where the recesses have a depth of 50 microns, the binary number "0" represent.

After the support layer 4 was imprinted, a magnetic ink is applied directly to the embossed surface of the support layer 4 applied. In this case, in the recesses having a depth of 100 μm, twice the amount of the magnetic ink can be accommodated in comparison with the recesses having a depth of only 50 μm. For example, when the magnetic ink is dried, the final thickness of the magnetic ink in the recesses having a depth of 100 μm may be 10 μm, whereas the final thickness of the magnetic ink in the recesses having a depth of 50 μm may be 5 μm ,

As a result, the magnetic code layer provides 5 with different thicknesses of the dried magnetic ink for the signal sequence, which can be read for example by means of a capacitive or inductive circuit (not shown).

Directly above the magnetic code layer 5 is preferably a cover layer 6 printed from ink. Similar to the support layer 4 and the magnetic code layer 5 is the cover layer 6 partly only within the free areas 3b between the writings or signs 3a arranged. The cover layer 6 provides protection and also provides a flat surface over the magnetic code layer 5 because the magnetic code position 5 itself may have an uneven surface when the magnetic ink is dried.

Preferably, the cover layer exists 6 a gray nitroacryl-soluble synthetic resin-based ink containing less than 5% aluminum powder, similar to the printed ink layer 3 or the support layer 4 ,

In the end, the side of the substrate 2 that of the magnetic code layer 5 opposite, and / or on the side of the thread 1 that the substrate 2 is opposite, a hot melt adhesive or a coating layer 7 can be applied, and it can be reactivated during the paper making step to the thread 1 to integrate into the paper (not shown).

A thread made in this way 1 can be processed in any paper mills in any manufacturing process, for example a step of integrating the yarn 1 in the paper.

In the case of processing in a so-called Windows technique before printing the hot melt adhesive or the coating layer 7 For example, the polyester bobbin (not shown) of the polyester substrate may be coupled to another polyester.

The security thread 1 According to the present invention provides the following advantages.

The optical characteristics of the security thread 1 that is, the negative characters or fonts 3a which are visually readable are printed using a conventional gray ink with a small amount of aluminum powder (less than 5%), while the conventional yarn is printed by applying a continuous aluminum layer on a polyester substrate and then by stripping a portion of the aluminum by demetallization is generated so as to form a negative sign. Thus, the manufacturing cost of the security thread according to the present invention is reduced, as the conventional costly steps for metallization and demetallization are omitted.

For example, while the conventional euro banknote security thread requires at least two sophisticated metallization and demetallizing devices, the security thread can 1 according to the present invention using the conventional roll press (not shown) having different areas and a printing width of 1600 mm, whereas the printing width of the conventional thread in the Euro banknote with an aluminum layer is 800 mm, which must be subjected to a demetallization process. This further reduces the costs considerably.

by virtue of the printing width of 1600 mm according to the present Invention can all necessary manufacturing steps on the same manufacturing assembly be implemented, and due to the double print width of 1600 mm compared to the conventional printing width of 800 mm, the double production quantity can be realized.

In addition, the gray color ink guides the printed ink layer 3 neither electric current nor heat due to the negligible amount of aluminum in it, leaving the printed ink layer 3 does not form a metallic background. This is the security thread 1 resistant even to the worst environmental conditions during the papermaking process.

The magnetic code layer 5 of the security thread 1 According to the present invention on the one hand has a flat surface due to the cover layer 6 , and on the other hand, different thicknesses of the magnetic ink due to the supporting layer 4 with the different embossed recesses. For example, the slots that represent the binary number "1" have twice the depth of the slots that represent the binary number "0". Since the binary number "0" can be clearly distinguished in comparison with the IMT format, in which the binary number "0" is characterized by the complete absence of a magnetic property, the security thread can 1 be at least 30% longer according to the present invention.

Of course you can the embodiment described above in more diverse Modified within the scope of the invention.

For example, the support layer 4 be omitted, so that the magnetic code position 5 directly onto the printed ink layer 3 is applied.

Alternatively, the function of the support layer 4 through the printed ink layer 3 be implemented, or the supporting position 4 Can be integral with the printed ink layer 3 be formed, with the result that the printed ink layer 3 itself recesses according to the predetermined signal sequence receives, for example by embossing rollers.

In addition, the cover layer 6 be omitted, so that the magnetic code position 5 directly through the hot-melt adhesive or through the coating layer 7 for example covered.

The support layer 4 receives differently embossed recesses by the embossing rollers, however, the different recesses may also be formed by another device or by another method such as a suitable printing device and a suitable printing method.

In the embodiment described above, the support layer 4 and the cover layer 6 only in the free areas 3b adjacent to the characters or fonts 3a arranged, but it is conceivable that the support situation 4 and / or the cover layer 6 have sufficient transparency so that they are above the characters or fonts 3a to be ordered.

In the embodiment described above, the characters or fonts are 3a as well as the magnetic code layer 5 arranged alternately, but it is conceivable that the characters or fonts 3a and the magnetic code layer 3 are arranged arbitrarily.

The magnetic code layer 5 According to the embodiment described above, implementing the signal sequence by modulating the thickness of the magnetic code layer. However, the magnetic code layer 5 be coded in any way. In addition, the magnetic code layer 5 implemented by the IMT format, and it is not limited to the modulated thicknesses.

The preferred embodiments according to this Description are for illustration and are non-limiting, and the invention is not limited to the details set forth herein limited, but it may be modified within the scope of the appended claims become.

A security device, preferably a security thread ( 1 ) to be inserted into a document such as a banknote has a substrate ( 2 ), preferably of a transparent polyester layer; a first layer over the substrate ( 2 ) and negative symbols or characters ( 3a ) contained therein; and a magnetic code layer ( 5 ) above the first position and adjacent to the negative symbols or signs ( 3a ), the first layer being a printed ink layer ( 3 ).

Claims (13)

Security device, preferably a security thread ( 1 ), in a document such. B. a bill is to be inserted, with a substrate ( 2 ), preferably of a transparent polyester layer; a first layer overlying the substrate ( 2 ) and negative symbols or characters ( 3a ) contained therein; and a magnetic code layer ( 5 ) above the first position and adjacent to the negative symbols or signs ( 3a ), characterized in that the first layer is a printed ink layer ( 3 ). Safety device according to claim 1, characterized in that the magnetic code layer ( 5 ) has a specific signal sequence obtained by modulating the thickness of the magnetic code layer ( 5 ) is trained. Safety device according to claim 2, further characterized by a supporting layer ( 4 ) located between the printed ink layer ( 3 ) and the magnetic code layer ( 5 ), wherein one surface of the supporting layer ( 4 ) on the side of the magnetic code layer ( 5 ) preferably has embossed recesses according to the specific signal sequence. Safety device according to one of the preceding claims, further characterized by a cover layer ( 6 ) above the magnetic code layer ( 5 ) is arranged. Safety device according to claim 4, further characterized by a heat-adhesive or coating layer ( 7 ) on the side of the substrate ( 2 ) opposite to the magnetic code layer ( 5 ) and / or on the side of the cover layer ( 6 ) opposite to the magnetic code layer ( 4 ). Safety device according to one of the preceding claims, characterized in that the printed ink layer ( 3 ), the supporting layer ( 4 ) and / or the cover layer ( 6 ) consists of a gray nitroacryllöslichen color ink based on synthetic resin, which consists of less than 5% aluminum powder containing less than 5% aluminum powder. Safety device according to one of the preceding claims, characterized in that the magnetic code layer ( 5 ) is a printed layer of a magnetic ink. Method for producing a security device, preferably a security thread ( 1 ), in a document such. B. a bill is to be inserted, with the following steps: Provision of a substrate ( 2 ) preferably of a transparent polyester layer; Arranging a first layer with negative symbols or characters ( 3a ) contained therein, above the substrate ( 2 ); and arranging a magnetic code layer ( 5 ) adjacent to the negative symbols or characters ( 3a ) over the first layer, characterized in that in the step of disposing the first layer, an ink layer ( 3 ) on the substrate ( 2 ) is printed. Method according to claim 8, further characterized by the following steps: printing a support layer ( 4 ) on the printed ink layer ( 3 ); Embossing recesses in an area of the supporting layer ( 4 ) on the side opposite to the printed ink layer ( 3 ) according to a specific signal sequence of the magnetic code layer ( 5 ), preferably by roll embossing; and in the step of arranging the magnetic code layer ( 5 ) the magnetic code layer ( 5 ) on the embossed surface of the support layer ( 4 ) printed by a magnetic ink. A method according to claim 8 or 9, further characterized by a step of Printing a cover layer ( 6 ) at the magnetic code position ( 5 ). A method according to claim 10, further characterized by a step of disposing a heat-sealable adhesive or coating layer ( 7 ) on the side of the substrate ( 2 ) opposite to the magnetic code layer ( 5 ) and / or on the side of the cover layer ( 6 ) opposite to the magnetic code layer ( 4 ). Method according to one of claims 8 to 11, characterized in that the printed ink layer ( 3 ), the supporting layer ( 4 ) and / or the cover layer ( 6 ) are printed by means of a gray color ink, preferably a nitroacryl-soluble synthetic resin-based ink having less than 5% aluminum powder. Method according to one of Claims 8 to 12, characterized in that the step of printing the printed ink layer ( 3 ) exploits a corona phenomenon