KR101899528B1 - Security element for a value document, manufacturing method, and corresponding document - Google Patents

Abstract

   In particular, the invention relates to a security element (12) for a genuine document (1) initially constituted by a plane support (G), said security element comprising a relief pattern (14) consisting of a plurality of lines (16) , Each of the lines of relief (16) having a profile (F) comprising a progressive change of shape along a predetermined line (16) or from one line to another line, said reticule (14) (12, 121, 122) of at least two adjacent or consecutive different colors (B, R, J), characterized in that the colored netting (14) Characterized in that the bands (3) are constituted by repeating successive bands (3) formed by a plurality of bands (3), all of which have the same orientation as the lines (16) And the security element 12.

Description

[0001] SECURITY ELEMENT FOR A VALUE DOCUMENT, MANUFACTURING METHOD, AND CORRESPONDING DOCUMENT [0002]

The present invention is directed to a security element for a document-value. The invention also relates to a manufacturing process for such a security element, and to a true document comprising at least one such element.

The present invention particularly applies to security elements for authentic documents such as credit documents or similar documents.

The term "fiduciary document" means all documents, such as bank notes, checks, bank cards, etc., for transferring a certain amount of money.

The term "similar document" means any document issued by an administrative authority of a State for the purpose of demonstrating the identity of a person or the right to drive a vehicle, such as an identity card, passport or driver's license.

This expression also refers to any kind of document as long as it functions to authenticate an object of value such as a label to be attached to the cloth. It also means any kind of document that functions to certify tax payments such as income recognition.

In such fields, more specifically in banknotes, it is known to incorporate one or more security elements of a changed nature in order to protect these documents from possible counterfeiting.

There are other types of security elements, more specifically those known as " first level ".

Such security elements are easily identifiable at the same time by the public by simple attention observation, but are inherently difficult to distinguish.

Such security elements sometimes have relatively complex graphic designs such as pre-printed, guilloche, bill of lading, and the like. The security element utilizes a variety of printing techniques such as offset printing, silk screen printing, intaglio printing, flexographic printing, typography, and the like.

In particular, there is a greater concern for security elements that produce moire effects within the scope of the present invention.

Generally, a wave pattern is a visual interference phenomenon that occurs as a result of overlapping of two reticulated patterns, for example, non-parallel lines.

Thus, in the banknote field, banknotes are known which have security elements with parallels formed of parallel colored lines which are formed in parallel with parallel lines and are oriented differently to the lines of the parallels .

Due to such a pattern, some color and color mixing effect occurs depending on the viewing angle.

Prior art for this technique is exemplified by U.S. Patent No. 4,033,059, European Patent No. 1 580 0 20, European Patent No. 1 829 709, and European Patent No. 1 393 925.

The Applicant has found that it is not necessary to use parallax patterns which are not parallel, in particular to obtain a gorgeous wave pattern effect.

Thus, a first object of the present invention is to provide a security element for a genuine document which is initially constituted by a planar support (G), wherein the security element comprises a coherent mesh pattern consisting of a plurality of lines, (12) having a profile comprising a gradual change of shape from one line to another line along a predetermined line, said reticule being colored, characterized in that said colored reticulated pattern 14) is constituted by repeating successive bands formed by adjacent or successive filaments of at least two different colors, all of which have the same orientation as the lines of the reticulated pattern Security element.

The " same direction " does not exclude the situation where some of these bands extend in different directions, but the bands extend parallel to the lines of the ridges.

The present invention is based on the idea of French Patent No. 2 942 811.

According to the present invention, the light effect described in detail in comparison with the effect described above can be generated, and can be displayed in a naked eye. This is the first level of security.

However, observing this element of security under a microscope, the complexity of the final relief shows that counterfeiters have another structure that is even more difficult to reproduce.

Therefore, the present invention makes it possible to detect a counterfeit bill with a microscope.

Second level security is therefore required accordingly.

According to other advantageous and non-limiting features of this security element,

Said changes obscuring a part of the filaments when viewed according to an angle which is not perpendicular to said plane support, said part gradually changing from one line to another, , ≪ / RTI >

- the width of the filaments is set such that the at least two colors can not be distinguished from one another visually from one another according to an angle of view perpendicular to the plane;

The shape change is periodic, such as profile height variation;

Each of said profiles comprising at least one flank forming an angle of inclination with respect to a direction perpendicular to the reticulated pattern, said change in shape forming a reduced optical effect of light reflection which varies as a function of the viewing angle of the security element A change in the angle of inclination of the flank by at least one line or at least two lines of a net-like pattern gradually from one line to another along this line,

The profiles generally have a triangular shape and the two adjacent profiles each comprise a crest separated by a furrow and the morphological change is a change in the position of the ridge between two adjacent wrinkles, The height of the ridge;

The corrugations being parallel to the bands;

The width of the bands being substantially equal to the width of the relief lines;

The width of the bands is in the range of 50 to 2000 μm, preferably 200 to 600 μm, more preferably 400 μm;

The color filaments forming the band are the same width;

The bands exhibit different orientations to constitute at least one bill image over at least a portion of their range;

In general, the planar supports are coated by colored bands and deformed by embossing stamp techniques by intaglio printing plates, which provide a pattern of etched lines in a form complementary to the line shape of the mesh.

A second object of the present invention relates to a manufacturing process of a security element as described above.

Finally, the present invention relates to a genuine document comprising at least one security element as described above.

This security element is preferably integrated into the document or attached to the document.

This true document is advantageously made from a combination of paper, textile material, plastic or at least two of these materials.

Other features and advantages of the present invention will become more apparent from the following detailed description of some preferred embodiments.

This detailed description is made with reference to the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a simplified top plan view of a calm document comprising a banknote and a security element in accordance with a first embodiment of the present invention.
Figure 2 is a highly enlarged top plan view of a portion of the security element that is evident from Figure 1 before being deformed.
FIG. 3A is a perspective view of a portion of an etch plate generated in a security element according to a first embodiment of the present invention; FIG.
Figure 3b shows a perspective view of three consecutive lines of netting integrated into a security element, according to a first variant embodiment of the invention, produced by a plate as described in connection with Figure 3a;
4A and 4B are views equivalent to the previous drawings of the plate and the security element according to the second embodiment.
Figure 5A is a partial top plan view of the security element of Figure 1 after modification.
Figures 5b and 5c are views of the ends facing the elements of Figure 5a.
FIG. 5D is a partial view of a transverse section of the security element of FIG. 5A at the level of refraction points indicated by S ₁ .
6 and 7 are end perspective views of third and fourth embodiments of the present invention, respectively.
Figure 8 is a top plan view of monetary printing integrated into a security element, such as the monetary printing of the present invention.
Figures 9 and 10 are greatly enlarged views of different sizes of intaglio printing plates for creating the security element shown in Figure 3b.
Figs. 11 and 12 are finally greatly enlarged views of different sizes of intaglio printing plates for generating the security element shown in Fig. 4b.

In reference to the present application, reference numbers for the printing plates of the " prime " In these states, the same reference number identifies the same element of each version of the security element whether or not it is classified as a " prime code "

Fig. 1 shows a genuine document (1) constituted by a bank bill.

Typically, and in the example provided herein, the bills include at least a price mark (in this case, 100) marked 10 at the back and a marking 11 denoting a portrait here.

The security element 12 according to the invention can also be seen in this banknote 1 on the left of the portrait.

In this example, the bank note true document (1) is made of paper or fiber material, or according to another variant, made of plastic material or a combination of these materials.

The security element 12 is integrated or attached to the banknote. On the latter premise, this means that the bill is formed of one member.

This security element 12 comprises a colored netting pattern which is constituted by the repetition of successive bands 3 formed by adjacent or continuous filaments of at least two different colors, according to a feature of the invention.

In the case represented in FIG. 2, each band is formed by parallel filaments denoted by three 120, 121 and 122, respectively, with different colors.

In this precise embodiment, the filaments 120, indicated by small crosses, exhibit a blue color indicated by B.

The continuous filaments 121 shown here as small circles represent the red color indicated by R.

Finally, the third filament 122, which has no display means in the figure, is yellow and indicated by J.

Of course, according to other embodiments, other combinations of colors may be selected.

The pitch of each filament (i.e., the width of each band) and width are denoted by P ₁ and L ₁ , respectively.

Preferably, the width L of the filaments 120 to 122 is set so that the colors B, R and J can not be distinguished by the naked eye, according to the viewing angle perpendicular to the plane G including the support of the security element, ₁ ) is set. In other words, the eye recognizes the combination of these colors.

In a particularly advantageous manner, the pitch P ₁ is 400 μm in size, while the color filaments 120 - 122 forming each band 34 are the same width L ₁ .

In another embodiment not shown, for example, the use of two or four different numbers of colors can be made.

These filaments need not necessarily be continuous but may simply be adjacent.

In the case of a drawing in which white is used, the color of the drawing is due to white or lack of color. In this case, the lack of color means that the right support is white.

The security element 12 is preferably colored by an offset type of printing process.

3 is a perspective view showing a plate for creating a first embodiment of a security element according to the present invention.

This plate includes a parallell 14 'of a substantially parallel line 16'. These lines 16 'provide a triangular shape in cross-section.

The two flanks of these lines are indicated by the signs 17'A and 17'B.

Here, the tilt angle? ' ₂ of the flank 17'B of the line 16' gradually changes along this line, but the tilt angle? ' ₁ of the flank 17'A gradually increases in the opposite direction . The two flankes 17'A and 17'B, which face two successive lines of the ridge pattern 14 ', are thus joined by forming a wrinkle 21' of constant depth.

H 'denotes the height of the reliefs, L' ₂ denotes the width of the lines 16 'and 1 / 2T' denotes the frequency of half the variation of the above angles.

Fig. 3b shows a part of the security element arising from the plate of Fig. 3a. The form is precisely the opposite of the form of the plate.

In this case, this security element comprises a rugged pattern 14 of lines 16 which are substantially parallel. These lines 16 are triangular in cross-section.

The two flanks of these lines are labeled 17A and 17B.

Here, the tilt angle? ₂ of the flank 17B of the line 16 gradually changes along this line, and the tilt angle? ₁ of the flank 17A gradually changes in the reverse direction. The two opposing flank 17A, 17B of the two consecutive lines of the netting pattern 14 are thus joined by forming a wrinkle 21 of constant depth.

Naturally, the parameters H, L ₂ and 1 / 2T are strictly equal to H ', L' and 1 / 2T '.

As shown in Figure 4a (second embodiment), the plate also includes a ridge pattern 14 'of lines 16' of the relief. Each line is inclined with respect to a plane perpendicular to the plane of the ridge pattern 14 '(this direction is shown as an axis z above the Cartesian marks ((x), (y) and (z) And at least flank 17'A, 17'B forming angle? ' ₁ .

In this example, each line 16 'is of a generally straight shape and the lines 16' of the ridge 14 'are parallel to each other.

The inclination angle alpha ₁ 'of the flank 17A of at least one line 16' of the deluge 14 'gradually changes along this line 16'.

Figure 4b shows a portion of the security element obtained by the plate of Figure 4a.

The inclination angle alpha ₁ of the flank 17A of at least one line 16 of the reticulated pattern 14 is determined by the angle of incidence of the line 16 in order to form the optical effect of the light reflections varying as a function of the viewing angle of the security element 12. [ 16).

Indeed, this gradual change is a sinusoidal type.

The colored grid described in connection with FIG. 2 appears below this reticulated pattern.

In both embodiments of Figures 3b and 4b, the pitch L _{2 of} each line is equal to the colored pitch P ₁ of Figure 2.

Figure 4b also shows the colored grid of Figure 2;

Figure 5a shows a top plan view under a microscope of a security element incorporating both a colored and a distorted pattern.

This modification is implemented according to the embossing of the support, in particular the so-called embossing stamp technique, specifically the non-ink intaglio.

This figure shows the presence of overlap of successive color bands, especially three different colors.

In this embodiment, the corrugations 21 separating the lines 16 are always the same height and are formed in a straight line, and the ridge 20 moves along the sine curve S indicated by the inflection point S ₁ .

In this figure, the eye of the observer is denoted by the reference numeral 15, which sees the security element in the lateral direction under strong light.

The periodic properties of the slopes of the flanks are interpreted by two phenomena.

On the one hand, at an angle, the flanks are directed perpendicular to the viewing angle, which maximizes the observed surface. On the other hand, the ridges cover opposite flanks. When this ridge is periodic and moving, the colors of the filaments of the bands are alternately exposed.

In addition, the constant firing of the paper is converted by the fact that the paper has been deformed by embossing. However, by deforming the paper, the trajectory of the point traveling transversely through the embossed pattern is also mathematically expanded.

For colored filaments, the same phenomenon occurs again. The width of the bands formed by three consecutive filaments is measured, for example, to 400 μm. The lines of the etched plate have the same 400 m width but due to the addition of three dimensions, in this case depth, the path for connecting the two transverse ends of the lines is increased.

On the support, for example, by arranging the blue filaments above the ridge and extending over either side of the ridge at a constant cross-section of the line (perpendicular to the extending direction of the lattice lines) , The blue filaments progressively pass from one side or the other as a function of displacement direction and leave room for the continuous filaments.

All of these phenomena contribute to the appearance of gorgeous rainbow colors visible to the naked eye, that is, the wave pattern effect reflected by the colors that make up the filament, thus authenticating the security element and the document with this security element.

Figures 5b, 5c and 5d show the deformation profile of two similar lines 16. In Figures 5b and 5c, each line has a right triangular shape; 5D is an isosceles triangular profile.

Of course, the visual effect obtained depends on the height H of the reliefs, the period T of the snaking of the slopes of the flank of the reliefs and the pitch P of the angular phase change of the flank.

Fig. 6 shows the isosceles of each line having an isosceles triangle-shaped cross-section, and the latter ridge varies in height according to the sine-like development.

In the embodiment of Fig. 7, the development of the lines along the steps of the stair of progressive height is utilized.

Figure 8 shows an impression (N) in the form of bills formed by a portion of the bands oriented in the original arc, within the network of bands of color. Together they form a C-shaped bill image.

Figs. 9 and 10 show an upper view of the engraved printing plate corresponding to the embodiment of Fig. 3A by an electron microscope. This plate is etched according to the patterns that complement the patterns to be created on the security element.

Likewise, Figs. 11 and 12 show top views of intaglio printing plates corresponding to the embodiment of Fig. 4A by electron microscopy.

The following parameters preferably have the values of the following indications:

Period of periodic motion: T is 0.5 to 50 mm, preferably 5 to 25 mm.

Depth of etching on the plates: P is 1-200 microns, preferably 40-150 microns, in particular 100 microns.

Width of etching (Lg) on plates: Lg is 50 to 2000 microns, preferably 200 to 600 microns, in particular 400 microns.

The width (Lf) of the filament and the width (Lb) of the bands: preferably Lb = nxLf (filament width) and n≥2. Preferably n = 3 and Lf = Lg / n. When Lg is 400 mu m and n = 3, Lf = 133,333 mu m and Lb = 400 mu m.

Different widths Lf are also possible, provided that [Sigma] Lf = Lg.

The lines embossed by the periodic motion are not always aligned in the transverse direction. They can be offset from line to line.

The color of the filaments can accumulate the characteristics of the second level (fluorescence, phosphorescence, infrared rays, heat discoloration, marker ink, etc.).

Claims (17)

A security element (12) for a genuine document (1) comprising a plane support (G), the security element comprising a relief pattern (14) consisting of a plurality of lines (16) (16) each have a profile (F) along a predetermined line (16) or with progressive morphological changes from one line to another line, said deluge (14) ) For a security element (12)
The colored mesh screen 14 is constituted by repeating successive bands 3 formed by adjacent or continuous filaments 120, 121, 122 of at least two different colors B, R, J, Characterized in that all of these bands (3) have the same orientation as said lines (16) of said netting (14). The method according to claim 1,
The morphological changes obscure a portion of the filaments 120, 121, 122 when viewed along an angle that is not perpendicular to the planar support G, Wherein the light source is configured to progressively change from one line to another to indicate a change in color and / or brightness. The method according to claim 1,
The widths of the filaments 120, 121 and 122 are set such that the at least two colors B, R and J can not be distinguished from each other by the naked eye according to the observation angle perpendicular to the support G Security elements for authentic documents. The method according to claim 1,
Characterized in that the morphological change is periodic, such as a change in the height of the profile (F). The method according to claim 1,
The profile F comprises at least one flank 17A, 17B which forms an inclination angle? ₁ with respect to a direction z perpendicular to the mesh pattern 14, Of at least one line 16 of a progressive, deluge 14 along line 16 from one line 16 to another, respectively, to form a reduced optical effect of light reflection that varies as a function of the viewing angle ) Or a change in the slope angle (? ₁ ) of the flank by at least two lines. 6. The method of claim 5,
The profiles having a triangular shape and the two adjacent profiles each comprising a ridge 20 separated by a wrinkle 21 which is characterized in that the ridge 20 between two adjacent wrinkles 21 , Or a change in the height (H) of the ridge (20). The method according to claim 6,
Characterized in that the pleats (21) are parallel to the bands (3). The method according to claim 1,
Characterized in that the width of the bands (3) is equal to the width of the lines (16) of the relief. The method according to claim 1,
Characterized in that the width of the bands is between 50 and 2000 mu m. The method according to claim 1,
Characterized in that the width of the bands is between 200 and 600 microns. The method according to claim 1,
Characterized in that the width of the bands is 400 m. The method according to claim 1,
Characterized in that the filaments (120, 121, 122) of the colors forming the band (3) are the same width. The method according to claim 1,
Characterized in that the bands (3) exhibit different orientations in order to constitute at least one bill image over at least a portion thereof. 14. A manufacturing process for a security element (12) according to any one of claims 1 to 13,
An intaglio printing plate (4) having a planar support (G) coated by the colored bands (120, 121, 122) and having at least one etched wrinkle in a form complementary to the shape of the wavy pattern (14) Wherein the first element is deformed by the second element. A complaint (1) comprising at least one security element according to any of the claims 1 to 13. 16. The method of claim 15,
Characterized in that the security element (12) is truly integrated into a document or attached to a genuine document. 16. The method of claim 15,
Wherein said true document is made of paper, textile material, plastic or a combination of at least two of these materials.

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