RU2685666C1 - Method to protect against counterfeit securities - Google Patents

Abstract

FIELD: counterfeit protection of security papers.SUBSTANCE: invention relates to protection against counterfeit securities, primarily banknotes, by creating a security image inside security paper, inaccessible for counterfeit. Protective image on the thread embedded in the security at the stage of its manufacturing is created by laser radiation pulses which penetrate through the valuable paper together with the thread, form channels in the security paper, and in the thread of the protective image point in the form of colored crystal-like structures from glass, metal alloy and material for painting structures into a given color. Said thread is made of glass fabric out of intertwined colored glass fibers drawn from glass melt, into which metal required for formation of crystal-like structures is introduced, and material for their painting.EFFECT: reduced thickness of thread, reduced power consumption for formation of protective image in thread, as well as reduced labor intensity of manufacturing of valuable paper.3 cl, 4 dwg

Description

The present invention relates to the protection of securities, primarily banknotes, from counterfeiting.

Prior art.

There is a method of protecting a security against counterfeiting by inserting a thread into the fabrication stage and applying a protective image to the thread with laser pulses penetrating the valuable paper along with the thread inside it (see, for example, RF Patent No. 2651330 C1, D21H 21 / 42, B42D 25/355, B42D 25/40).

In accordance with this method, the thread is made in the form of a multilayer structure of a plastic substrate coated with a layer of colored phosphor, with a monolayer of glass microlens partially immersed in this phosphor in the form of transparent microballs coated with a layer of metallized foil. When a laser pulse is applied to a filament within the laser spot, the microlenses are fused with a phosphor and metal of the foil into a clot, which, after the laser pulse has stopped, crystallizes and forms a protective image in the filament in the form of a colored crystal-like structure the channels formed by the laser beam in the security. The basis of this crystal-like structure is glass, painted in a given color with phosphor. The presence of metal in the clot allows the crystallization process to occur.

The known method allows you to create in the inside of the security yarn dots of a color security image that are inaccessible for counterfeit counterfeiters. However, the implementation of the thread of many layers is associated with large labor costs, which increases not only the cost of the thread, but also the cost of manufacturing a security. In addition, a multi-layered thread has a considerable thickness, which makes it difficult to integrate inside a standard-grade security paper. Also, a multi-layered thread requires significant energy costs for the formation of protective image points in it.

Disclosure of the invention.

The invention is based on the task of reducing the laboriousness of manufacturing a security paper embedded inside it, created on the basis of using glass, and also reducing the thickness of the thread to a size that allows you to comfortably place it inside a standard thickness paper, reducing the energy costs for the formation of protective images in the form of colored crystal-like structures.

The task is solved by the fact that in the method of protection against counterfeit securities by embedding it inward at the thread manufacturing stage and creating protective image points in the form of crystal-like structures made of glass fused between themselves under the action of laser radiation pulses, and the material dyeing them in a given color, in accordance with the invention, the thread is made in the form of glass cloth from interwoven colored glass fibers pulled out of Av window into which the metal required for the formation of crystal structures, and their coloring material in a predetermined color.

With this method of protection against counterfeit securities, the need to produce a thread of several layers is eliminated, each of which contains glass, metal, and dyeing material, which must be combined to form colored crystal-like structures. In the present invention, all the components necessary for the formation of these structures are already available in colored glass fibers, of which fiberglass is manufactured industrially. This dramatically simplifies and reduces the cost of manufacturing and the cost of both the yarn and the security, with the yarn embedded in it.

Eliminating the need to make multi-layered yarns to protect securities allows you to comfortably place fiberglass yarns within a wide range of securities that need protection.

Also, the use of thin fiberglass yarns will dramatically reduce the energy consumption for applying a protective image of colored crystal-like structures onto them.

It is advisable that laser pulses penetrate valuable paper along with the thread embedded inside at given points, melt the colored glass fibers of the glass fabric within the laser spot into colored glass clots, crystallize these bunches after the laser pulses stop and form crystal-like structures of protective points in the filament images along the axis of channels created in a security paper by pulses of laser radiation.

With this method of protection against the forgery of a security, a protective image from a set of crystal-like structures in the channels of the security paper is easily identified in transmitted light through the input or output openings of these channels.

It is advisable that a laser mode is set in which fragments of a bunch of melted colored fibers are scattered on the inner surface of the channel in valuable paper, these fragments are partially embedded in the body of the paper, cause them to crystallize after the laser pulse terminates, and cover the entire inner surface of the channel with crystal-like structures, cause the refraction and dispersion of light passing into the channels on these structures during turns of the security paper and create in the channels of the security paper ptichesky effect to protect it from counterfeiting.

With this method of protection against forgery of a security, an easy identification of the security feature confirming the authenticity of the security is provided.

Brief description of the drawings.

The invention is further explained in the description of a specific, but not limiting, present invention embodiment and the accompanying drawings, in which:

FIG. 1 illustrates the inlets of the security image to us on the front side of the security paper;

FIG. 2 shows section A-A in FIG. 1 and illustrates the thread embedded in a security paper prior to exposure to it by pulses of laser radiation;

FIG. 3 illustrates a thread embedded in a security paper after exposure to it with pulses of laser radiation;

FIG. 4 illustrates the formation of colored crystal-like structures on the surface of a through channel in a valuable paper with a special laser mode.

The best embodiments of the invention

The proposed method of protection against forgery of securities is as follows:

In the raw paper, on which the valuable paper 1 will later be printed, the thread 2 is implanted. This thread is a glass fiber tape 3 in the form of intertwined colored glass fibers. Glass fabric is manufactured industrially with a wide gradation of thickness from 30 μm and above from colored glass fibers, which are continuously pulled out of glass melt. These fibers can be of any color depending on the materials to be painted into the glass melt.

When coloring glasses with molecular dyes, their color does not change upon repeated heat treatment. These dyes mainly include heavy metal oxides, which dissolve in the glass melt. Thus, cobalt compounds give the glass a blue color; nickel - red-violet color, cadmium - bright yellow color, etc.

To create an image in yarn 2 that protects valuable paper 1 from counterfeiting, laser pulses 4 are applied to given points on the surface of valuable paper 1, penetrating valuable paper 1 along with thread 2 through and forming input 5 and output on the front and back sides of the valuable paper 6 hole channels 7.

At the same time, as a result of exposure of laser radiation pulses 4 to fiberglass yarn 2, colored glass fibers will be melted within the laser spot, forming inside the channels 7 bunches of molten colored glass with metal embedded in it when the glass is being cooked. , and material for their coloring in a given color.

After the termination of the laser radiation pulses, colored glass clots with the metal included in it crystallize, resulting in channels 7 forming colored dots of a protective image in the form of crystal-like structures 8 visible in transmitted light through holes 5 and 6 in valuable paper.

A possible embodiment of this method of protection against forgery of securities, in which the channels in the securities will not be blocked by colored crystal-like structures, since these structures will cover the entire inner surface of the channels. To implement this option, set the mode of operation of the laser, in which provide for the scattering of fragments of colored glass clot with metal included on the inner surface of the channel in valuable paper. At the same time, the scattered fragments are partially embedded in the body of the paper and securely fasten on the inner surface of the channel. After the termination of the laser pulse, these fragments will crystallize with the metal included in them, as a result of which the inner surface of the channels will be covered with colored crystal-like structures.

When the security bends, the light penetrated into the channels will undergo dispersion on crystal-like structures and create a clear optical effect, which allows to distinguish the genuine security from the counterfeit one.

Industrial Applicability

The described method makes it possible not only to reliably protect valuable paper from forgery, but also to significantly simplify this process by making fiberglass yarn, which eliminates the need to make yarns of several layers of different materials.

Claims (3)

1. Method of protection against counterfeit securities by inserting inside it at the stage of manufacturing the thread and creating in it under the action of laser radiation pulses of points of a protective image in the form of crystal-like structures made of glass fused between themselves, metal that crystallizes these structures, and the material that paints them in a given color, characterized in that the thread is made in the form of glass fiber from interwoven colored glass fibers drawn from a melt of glass into which metal is introduced, are necessary th for the formation of crystal-like structures, and material for their coloring in a given color. 2. A method according to claim 1, characterized in that laser pulses penetrate valuable paper along with a thread embedded inside the laser pulses, melt the colored glass fibers of the glass fabric within the laser spot into colored glass clots, crystallize these bunches after the laser pulses radiation and form in the filament crystal-like structures of the points of the protective image along the axis of the channels created in the valuable paper by laser pulses. 3. The method according to p. 1, characterized in that set the mode of operation of the laser, in which provide scatter fragments of melted colored fibers on the inner surface of the channel in valuable paper, partially embed these fragments in the paper body, cause them to crystallize after the cessation of pulses laser radiation, cover the inner surface of the channels with colored crystal-like structures, cause the refraction and dispersion of the light passing into the channels on these structures when turning the security paper and create a security channel optical effect to protect it against forgery.

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