KR20040107469A - Security device, preferably a security thread, comprising characters being visually readable as well as magnetic characteristics, and method of producing the same - 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

SECURITY DEVICE, PREFERABLY A SECURITY THREAD, COMPRISING CHARACTERS BEING VISUALLY READABLE AS WELL AS MAGNETIC CHARACTERISTICS, AND METHOD OF PRODUCING THE SAME }

A security thread that is partially or wholly mixed in the paper substrate of the banknote during the manufacturing process of the paper substrate is commonly used in the security device for checking the authenticity of the banknote.

One such conventional security company is used in EURO bills. To realize such a security firm, the three methods are applied in a combination with the following characteristics:

First, aluminum is brought into contact with one side thereof on the polyester substrate, and then a pure aluminum base layer is supplied on the polyester substrate so as to form concave letters or script as negative by demetallization or exfoliation of the aluminum portion from the aluminum base base layer. To form negative characters and / or scripts in the complete metal layer. These characters or scripts are referred to herein as "negative characters or scripts." By visual check of these characters and / or script against the background of the backlight, these characters appear transparent and therefore readable.

The presence of metal components can be detected by the use of capacitive or inductive circuits.

Second, conventional security firms include the magnetic properties of the so-called IMT-format. This IMT-format is realized by placing on a surface having a single module length that is greater than zero and has a constant length that is constant and that has a controlled length and a constant thickness. These security firms were developed and patented by the Bank of England.

Third, a security firm includes a combination of metal and magnetic properties as a single security firm.

For the development and manufacture of security firms with the above-mentioned properties, the problem of corrosion arises when the security officer with magnetic properties on the metal component is introduced into the aqueous or wet solution commonly used for paper production. Apart from this, physical know-how, high end and low cost manufacturing methods are required. This corrosion can lead to loss of magnetic and / or metal properties.

In addition, the degraded water used for paper production is often disinfected with chlorine, making the production of security companies difficult.

Another example of a conventional security firm is disclosed in EP-0 516 790 B1 and shown in FIG. 3. Here, a conventional security company includes a transparent substrate, a metal layer such as a pure aluminum layer having a negative character 30a mixed therein, and a magnetic layer 50 arranged above or below the metal layer, the geometry of the metal layer 50 being The arrangement allows for the exposure of negative characters 30a (in this specification, the terms “up” and “down” refer to opposite directions).

Such a method of manufacturing a security company includes the steps of printing an active ink on a substrate, supplying a metal layer on the printed side of the substrate, and activating the ink to remove the ink along with the metal placed thereon, thereby forming a recess in the metal layer. Forming a step. Thus, a negative character is obtained.

The present invention relates to a security device and a method of manufacturing the same. Preferably, the security device is a security thread having not only its own characteristics but also negative characters or scripts visible by the naked eye. The security firm can be mixed in documents such as bills.

1 shows a schematic plan view of a security device according to an embodiment of the invention.

2 is a schematic cross-sectional view of the security device shown in FIG.

3 is a schematic cross-sectional view of a conventional security company.

SUMMARY OF THE INVENTION An object of the present invention is to provide an internal security yarn including a character which is visible to the naked eye against a background light as well as an area having a coded magnetic property, and a manufacturing method thereof.

This object is solved by the security company of the present invention or its manufacturing method according to the present invention.

According to one aspect of the invention, a security device, preferably a security yarn, mixed in a document such as a bill, is preferably a substrate of a transparent polyester layer; A first layer having negative characters or scripts arranged on the substrate and mixed therein; And a magnetic code layer arranged on the first layer in a region adjacent to the negative character or script, wherein the first layer is a printed ink layer. In this way, the high cost conventional aluminum layer supplied to the substrate is omitted, and the safety device does not have any metallic background which can cause corrosion problems.

Preferably, the magnetic code layer includes a special signal sequence formed by adjusting the thickness of the magnetic code layer.

Preferably, a support layer is arranged between the printed ink layer and the magnetic code layer, and the surface of the support layer on the side of the magnetic code layer preferably has embossed recesses according to a special signal sequence.

Preferably, the cover layer is arranged directly on the magnetic code layer, thereby protecting and smoothing the magnetic cord.

Preferably, a heat adhesive adhesive or coating is provided on the side of the substrate opposite the magnetic code layer and / or on the side of the cover layer opposite the magnetic code layer to facilitate mixing of the security device into a document such as a banknote. .

Preferably, the printed ink layer, support layer and / or cover layer is made of gray nitroacrylic soluble resin ink containing up to 5% aluminum powder. Thus, the security device has the appearance of a metallic thread, but due to the negligible amount of aluminum in the ink, the security device has no metallic background due to lack of electrical or thermal conductivity.

Preferably, the magnetic code layer is a printed layer of magnetic ink that can enable easy manufacture of this magnetic code layer.

According to a second aspect of the invention, there is provided a method, comprising: supplying a substrate of a transparent polyester layer; Arranging on the substrate a first layer having negative characters or scripts mixed therein; And arranging a magnetic code layer on the first layer in an area next to or adjacent to the negative characters or script, wherein in the arranging of the first layer, the ink layer is printed on a document, such as a banknote, printed on a substrate. Provided is a method of manufacturing a security device that is mixed and preferably a security company.

Preferably, the method comprises the steps of printing a support layer on the printed ink layer; Embossing the recess in the surface of the support layer on the side opposite the printed ink layer according to a special signal sequence of the magnetic code layer, preferably by a roll; And in the arranging of the magnetic code layer, the magnetic code layer is printed on the embossed surface of the support layer by the magnetic ink.

Preferably, the method further comprises the step of printing a cover layer on the magnetic code layer.

Preferably, the method further comprises arranging a heat adhesive adhesive or coating layer on the side of the substrate opposite the magnetic code layer and / or on the side of the cover layer opposite the magnetic code layer.

Preferably, the printed ink layer, support layer and / or cover layer is printed by nitroacrylic soluble resin ink containing gray ink, preferably up to 5% aluminum powder.

Preferably, the printing step of the printed ink layer uses a corona phenomenon.

Other aspects and advantages of the present invention will become apparent from the following description with reference to the accompanying drawings which illustrate preferred embodiments of the present invention.

As a system for manufacturing the security device of the present invention, such as the security yarn 1 for mixing into a document such as a bill (not shown), for example, a conventional engraving printer (not shown) employed for printing a flexible packing material can be used. have.

The configuration of the security yarn 1 and the manufacturing method of the present invention will be described in connection with Figs. 1 and 2, which show schematic plan and cross-sectional views of the security yarn 1.

The security yarn 1 is preferably constructed by a substrate which is a transparent polyester substrate 2.

On the substrate 2, a printed ink layer 3 is arranged having negative characters or scripts 3a that appear transparent when visually checking them against the background.

For printing, nitroacrylic water-soluble resin inks containing preferably 5% or less of aluminum powder are provided to 52 dynes or less by corona development. Since the ink contains a negligible amount of aluminum therein, the ink does not conduct electricity or heat. The ink is preferably gray or silver ink.

The printed ink layer 3 is not completely enclosed by the character or script 3a so that there is enough free area 3b to arrange the magnetic code adjacent to the character or script 3a to be provided in a later step. It should be noted.

In the free area 3b directly above the printed ink layer 3, the support layer 4 is preferably present. The support layer 4 is only partially arranged within the free area 3b adjacent the character or script 3a such that the text or script 3a and the support layer 4 are alternately arranged along the longitudinal direction of the security thread 1. It should be noted that the characters or scripts 3a are not wrapped by the support layer 4.

Preferably, the support layer 4 is also printed with a gray nitroacrylic water-soluble resin ink containing up to 5% aluminum powder.

Directly above the support layer 4 a magnetic code layer 5 is arranged. Like the support layer 4, the magnetic code layer 5 is only partially arranged within the free area 3b between the character or script 3a.

The magnetic code layer 5 is preferably formed by a first embossing recess in the surface of the support layer 4 opposite to the ink layer 3 printed by roll embossing (not shown). That is, a plurality of concave grooves having different depths are formed in the support layer 4 by roll embossing, so that, for example, the concave grooves representing the binary number "1" have a depth of 100 占 퐉 while the concave showing the binary number "0". The groove produces a predetermined signal sequence as having a depth of 50 μm.

After the support layer 4 is embossed, magnetic ink is supplied onto the embossed surface of the support layer 4. In this case, in the concave groove having a depth of 100 mu m, a double amount of magnetic ink can be accommodated compared to the concave groove having a depth of 50 mu m. For example, when the magnetic ink is dried, the final thickness of the magnetic ink in the recessed groove having a depth of 100 μm will be 10 μm, and the final thickness of the magnetic ink in the recessed groove having a depth of 50 μm is 5 μm. Will be.

As a result, the magnetic ink layer 5 comprising different thicknesses of the dried magnetic ink provides a signal sequence that is readable by, for example, a capacitive or inductive circuit (not shown).

The ink cover layer 6 is preferably printed directly above the magnetic code layer 5. Like the support layer 4 and the magnetic code layer 5, the cover layer 6 is only partially arranged within the free area 3b between the character or script 3a. Since the magnetic code layer 5 itself may have a non-uniform surface upon drying of the magnetic ink, the cover layer 6 provides a flat surface on the magnetic code layer 5 and protects it.

Preferably, cover layer 6 is composed of a gray nitroacrylic water-soluble resin ink containing up to 5% aluminum powder, such as printed ink layer 3 or support layer 4.

As a result, a heat-adhesive adhesive or coating layer 7 may be supplied on the side of the substrate 2 opposite the magnetic cord layer 5 and / or on the side of the security yarn 1 opposite the substrate 2, It may be reactivated during the manufacture of the paper for mixing the security yarn 1 in the paper (not shown).

Thus, the produced security yarn 1 can be transferred into any paper mill by any manufacturing method, for example in the step of mixing the security yarn 1 in paper.

In the case of treatment by the so-called Windows technique before printing the heat-adhesive adhesive or coating layer 7, the polyester bobbin (not shown) of the polyester substrate may be combined with other polyesters.

The security company 1 according to the present invention provides the following advantages.

Conventional security firms are produced by supplying a complete layer of aluminum on a polyester substrate and then peeling off the aluminum portion by demetallization to form negative characters, while the negative characters or scripts 3a become visible to the naked eye. The optical feature of the security yarn 1, which is meant to be printed by a conventional gray ink with a small amount (less than 5%) of aluminum powder. Thus, since the conventional expensive metallization and demetallization step are omitted, the manufacturing cost of the security company according to the present invention is reduced.

For example, conventional euro banknotes require at least two high-end devices for metallization and demetallization, must undergo a demetallization process, and a conventional security company in a conventional euro banknote with an aluminum layer. While the printed layer is 800 mm, the security yarn 1 according to the invention can be produced using conventional rotary press rollers (not shown) having different sections and printing depths of 1600 mm. Thus, the cost is further reduced significantly.

Due to the printing thickness of 1600 mm according to the invention, all the necessary process steps can be carried out in the same production assembly, and due to the printing width of 1600 mm, which is twice the printing width of the conventional 800 mm, twice the yield Can be realized.

In addition, since the gray ink of the printed ink layer 3 does not conduct electricity or heat due to negligible amounts of aluminum in the ink, the printed ink layer 3 forms a nonmetallic background. Therefore, the security company 1 withstands even the worst environmental conditions during the paper manufacturing process.

The magnetic code layer 5 of the security yarn 1 according to the invention differs from one another due to the provision of a support layer 4 with a uniform face on the one hand due to the cover layer 6 and on the other hand with different embossed recesses. Has the thickness of the ink. For example, the concave groove representing the binary number "1" is twice the depth of the concave groove representing the binary number "0". Since the binary "0" can be clearly differentiated compared to the IMT format, the binary "0" is characterized by a complete lack of magnetic properties, and the security firm 1 according to the invention is at least 30% longer.

As a matter of course, the above-described embodiments can be changed to many various modifications within the scope of the present invention.

For example, the support layer 4 may be omitted to supply the magnetic code layer 5 directly onto the printed ink layer 3.

In addition, the function of the support layer 4 can be performed by the printed ink layer 3, or the support layer 4 is formed integrally with the printed ink layer 3, so that a predetermined signal sequence is obtained, for example, by roll embossing. The ink layer 3 printed according to this can obtain a concave groove by itself.

In addition, the cover layer 6 can be omitted, for example, by allowing the magnetic cord layer 5 to be directly wrapped by the heat-adhesive adhesive or the coating layer 7.

The support layer 4 obtains other embossed concave grooves by roll embossing, but other concave grooves can also be formed by other devices or methods such as suitable printing apparatuses and methods.

In the above-described embodiment, the support layer 4 and the cover layer 6 are arranged only in the free area 3b adjacent to the character or script 3a, but the support layer 4 and / or the cover layer 6 are formed of the character or It is conceivable to have sufficient transparency to be arranged on the script 3a.

In the above-described embodiment, the characters or script 3a and the magnetic code layer 5 are alternately arranged, but it is conceivable that the characters or script 3a and the magnetic code layer 5 are each arranged in some way. .

The magnetic code layer 5 according to the embodiment described above executes a signal sequence by adjusting the thickness of the magnetic code layer. However, the magnetic code layer 5 can be coded in any way. Moreover, the magnetic code layer 5 can be implemented by the IMT format and is not limited to the adjusted thickness.

Preferred embodiments as described herein are to be considered as illustrative and not restrictive, and the invention is not to be limited to the details given herein, but may be modified within the scope of the appended claims.

The security device, preferably a security yarn 1, mixed in a document such as a bill, is preferably a substrate 2 of a transparent polyester layer; A first layer having negative characters or scripts 3a arranged on and mixed in the substrate 2; And a magnetic code layer 5 arranged on the first layer adjacent to the negative character or script 3a, the first layer being a printed ink layer 3.

Claims (13)

Preferably a substrate 2 of a transparent polyester layer; A first layer having negative characters or scripts 3a arranged on the substrate 2 and mixed therein; And A security device, preferably a security company 1, mixed in a document, such as a bill, comprising a magnetic code layer 5 arranged on a first layer adjacent to a negative character or script 3a, A security device, characterized in that the first layer is a printing ink layer (3). 2. A security device according to claim 1, wherein the magnetic code layer (5) comprises a special signal sequence formed by adjusting the thickness of the magnetic code layer (5). A support layer 4 is arranged between the printed ink layer 3 and the magnetic code layer 5, and the surface of the support layer 4 on the side of the magnetic code layer 5 is subjected to a special signal sequence. Therefore, the security device characterized in that it preferably has an embossed concave groove. 4. Security device according to any one of the preceding claims, characterized in that a cover layer (6) is arranged on the magnetic code layer (5). The heat-adhesive adhesive or coating layer (7) according to claim 4, on the side of the substrate (2) opposite the magnetic cord layer (5) and / or on the side of the cover layer (6) opposite the magnetic cord layer (4). Security device, characterized in that provided. 6. The printed ink layer (3), the support layer (4) and / or the cover layer (6) according to any one of claims 1 to 5 are made of gray nitroacrylic soluble resin ink containing up to 5% aluminum powder. Security device characterized in that it is manufactured. 7. Security device according to one of the preceding claims, characterized in that the magnetic code layer (5) is a printed layer of magnetic ink. Providing a substrate 2 of a transparent polyester layer; Arranging on the substrate 2 a first layer having negative characters or scripts 3a mixed therein; And A method of manufacturing a security device, preferably mixed with a document, such as a bill, and preferably a security company 1, comprising arranging a magnetic code layer 5 on a first layer adjacent to a negative character or script 3a. In the arrangement step of the first layer, the ink layer (3) is printed on the substrate (2). The method of claim 8, further comprising: printing a support layer (4) on the printed ink layer (3); Embossing the recess in the surface of the support layer 4 on the side opposite the printed ink layer 3 according to the special signal sequence of the magnetic code layer 5, and In the arrangement step of the magnetic code layer (5), the magnetic code layer (5) further comprises the step of printing on the embossed surface of the support layer (4) by magnetic ink. 10. The method according to claim 8 or 9, further comprising the step of printing a cover layer (6) on the magnetic code layer (5). The heat-adhesive adhesive or coating layer (7) according to claim 10, on the side of the substrate (2) opposite the magnetic cord layer (5) and / or on the side of the cover layer (6) opposite the magnetic cord layer (4). And further comprising arranging. 12. The printed ink layer (3), the support layer (4) and / or the cover layer (6) according to any one of claims 8 to 11, containing nitroacryl containing gray ink, preferably up to 5% aluminum powder. Printed by soluble resin ink. The method according to any one of claims 8 to 12, wherein the printing of the printed ink layer (3) uses a corona phenomenon.