KR20140026446A - Security element for a value document, manufacturing method, and corresponding document - Google Patents

Abstract

   The present invention particularly relates to a security element 12 for a genuine document 1, initially initially constituted by a planar support G, wherein the security element is embossed reticulated pattern 14 consisting of a plurality of lines 16. Each of the lines 16 of the relief have a profile F comprising a gradual shape change along a predetermined line 16 or from one line to another, wherein the reticulated pattern 16 is colored. In the secure element 12 for the soothing document 1, the colored reticulated pattern 16 comprises at least two three or more adjacent or successive different colors (B, R, J) of the filaments 120, 121, A true document characterized by the repetition of successive bands 3 formed by 122, all of which have the same direction as the lines 16 of the reticulated pattern 14. For the security element 12.

Description

SECURITY ELEMENT FOR A VALUE DOCUMENT, MANUFACTURING METHOD, AND CORRESPONDING DOCUMENT}

The present invention relates to a secure element for document-value. The invention also relates to a process for the manufacture of such a security element, and to a genuine document comprising at least one such element.

The invention applies in particular to secure elements for authentic documents such as, for example, credit documents or similar documents.

The expression "fiduciary document" means all documents, such as bank notes, checks, bank cards, etc., for transmitting a certain amount.

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

This wording also means any kind of document if it serves to certify an object of value, such as a label to be attached to a cloth. It also means any kind of document if it functions to certify payment of taxes, such as revenue receipts.

In that field, more specifically in banknotes, it is known to incorporate one or more security elements of varying nature to protect these documents from possible forgeries.

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

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

Such security elements often have relatively complex graphic designs, such as line printing, braids, discs of bills, and the like. The secure element uses several printing techniques such as offset printing, silk screen serigraphy, intaglio, flexo printing, typography, and the like.

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

In general, water ripples are visual interference phenomena that arise as a result of the superposition of two reticular patterns consisting of, for example, non-parallel lines.

Thus, in the field of banknotes, banknotes are known which have a security element with a reticulated pattern of parallel colored lines formed by reliefs and parallel colored lines oriented differently with respect to the lines of the reliefs .

This pattern causes some color and mixed effects depending on the viewing angle.

Prior arts to this technology can be exemplified in US Patent 4 033 059, European Patent 1 580 0 20, European Patent 1 829 709 and European Patent 1 393 925.

Applicants have found that particularly brilliant moire effects can be obtained without necessarily using non-parallel reticulated patterns.

As described above, the first object of the present invention is an authentic document security element which is initially constituted by the planar support (G), the security element comprising a relief-patterned mesh pattern consisting of a plurality of lines, each of the lines of the relief Is a profile comprising a gradual shape change along a predetermined line or from one line to another, wherein the reticulated pattern is colored. 16) consists of a repetition of successive bands formed by at least two adjacent or successive different colored filaments, all of which have the same direction as the lines of the reticulated pattern. It is about the security element.

"The same direction" does not exclude a situation in which some of these bands extend in different directions, but means that the bands extend parallel to the reticulated lines.

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

According to the present invention, the light effect described in detail compared to the above-described effect can be generated to be visible to the naked eye. This is the first level of security.

However, microscopic observation of this security element shows another structure that is more difficult for counterfeiters to reproduce, due to the complexity of the final relief.

The present invention thus makes it possible to detect counterfeit bills under a microscope.

This requires a second level of security.

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

Said changes, when observed according to an angle not perpendicular to said planar support, the relief hides some of the filaments, said parts gradually changing along the line or from one line to another Is configured to indicate a change in

According to the viewing angle perpendicular to the plane, the width of the filaments is set such that the at least two colors cannot be visually distinguished from each other correctly;

The shape change is periodic, such as the height change of the profile;

Said profiles each comprising at least one flank which forms an angle of inclination with respect to a direction perpendicular to the reticulated pattern, wherein the shape change is to form a reduced optical effect of the light reflection which varies as a function of the viewing angle of the security element. To include a change in the angle of inclination of the flank by at least one line or at least two lines of a reticulated pattern, each along this line from one line to another,

The profiles generally have a triangular shape, two adjacent profiles each comprising a crest separated by a furrow and the shape change is a change in the position of the ridge between the two adjacent corrugations or Consisting of a change in height of the ridge;

The corrugations are parallel to the bands;

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

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

The colored filaments forming the band are of the same width;

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

The generally planar support is coated by colored bands and modified by an embossed stamp technique by a negative printing plate, which provides a reticulated pattern of etched lines that complements the reticulated line shapes.

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

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

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

Such a true document is advantageously made of paper, fiber material, plastic or a combination of 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.
1 is a simplified top plan view of an authentic document consisting of bank notes and including a security element according to a first embodiment of the invention.
FIG. 2 is a very enlarged top plan view of a portion of the secure element apparent from FIG. 1 before being deformed. FIG.
3A is a perspective view of a portion of an etch plate occurring in a security element according to a first embodiment of the invention.
FIG. 3B shows a perspective view of three consecutive lines of reticulated patterns integrated into a security element, according to a first variant embodiment of the invention, produced by a plate as described in connection with FIG. 3A;
4a and 4b are views equivalent to the preceding figures of the plate and the security element according to the second embodiment.
5A is a partial top plan view of the security element of FIG. 1 after deformation.
5B and 5C are views of the ends opposite the element of FIG. 5A.
FIG. 5D is a partial view of the transverse cross section of the security element of FIG. 5A at the level of inflection point indicated by S ₁ ; FIG.
6 and 7 are end perspective views, respectively, of the third and fourth embodiments of the present invention.
8 is a top plan view of monetary printing integrated into a secure element, such as monetary printing of the present invention.
9 and 10 are very enlarged views of different sizes of the engraved printing plate for generating the secure element shown in FIG. 3B.
11 and 12 are finally very enlarged views of different sizes of the engraved printing plate for generating the secure element of FIG. 4b.

Consistent with this application, reference numerals for printed plates of “prime” markings will be used as conventional. In these states, the same reference number indicates the same element of each edition of the secure element, whether or not classified as a "prime code" indication.

1 shows a true document 1 constituted by a bank bill.

Typically, and in the examples provided herein, the bill includes at least a price sign, in this case 100, in the back, 100 in this case, and a decoration, here 11, representing the portrait.

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

In this example, the true document 1, which is a banknote, is made of paper or fiber material, or, in another variant, by a plastic material or a combination of these materials.

The security element 12 is integrated or attached to the bill. In this latter premise, this means that it is formed from the banknote and one member.

This security element 12 comprises colored reticulated patterns formed by repetition of successive bands 3 formed by adjacent or successive 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 three parallel filaments labeled 120, 121, 122, each having a different color.

In this exact embodiment, the filaments 120, indicated by small crosses, appear blue, indicated by B.

The continuous filaments 121 shown here in small circles represent a red color indicated by R.

Finally, the third filament 122 without the display means in the figure is yellow and denoted by J.

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

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

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

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

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

These filaments need not necessarily be continuous, they 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 no color. In this case, the absence of color means that the support that appears immediately is white.

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

Figure 3 is a perspective view, showing a plate for producing a first embodiment of a security element according to the invention.

This plate comprises a reticulated pattern 14 'of substantially parallel relief lines 16'. These lines 16 'provide a triangular form in cross section.

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

Here, the inclination angle α ' ₂ of the flank 17'B of the line 16' gradually changes along this line, while the inclination angle α ' ₁ of the flank 17'A is gradually reversed. Changes to The two flanks 17'A and 17'B opposite the two consecutive lines of the reticle 14 'are thus joined by forming a pleat 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 portion of the security element resulting from the plate of FIG. 3A. The form is exactly the opposite of the shape of the plate.

In this case, this security element comprises a mesh 14 of lines of relief 16 that are substantially parallel. These lines 16 are triangular in cross section.

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

Here, the inclination angle α ₂ of the flank 17B of the line 16 gradually changes along this line, and the inclination angle α ₁ of the flank 17A gradually changes in the reverse direction. Two opposite flanks 17A, 17B of two consecutive lines of the reticle 14 are thus joined by forming a pleat 21 of constant depth.

Naturally, the parameters H, L ₂ and 1 / 2T are exactly the same as H ', L' and 1 / 2T '.

As shown in FIG. 4A (second embodiment), the plate also includes a reticulated pattern 14 'of lines 16' of the relief. Each line is inclined with respect to the vertical direction of the plane of the reticle 14 '(shown in the axis z above the Cartesian marks ((x), (y) and (z)) indicated in the figures). At least flanks 17'A, 17'B forming an angle α ' ₁ .

In this example, each line 16 'generally has the form of a straight line and the lines 16' of the reticle 14 'are parallel to each other.

The inclination angle α ' ₁ of the flank 17A of at least one line 16' of the reticulated pattern 14 'varies gradually along this line 16'.

FIG. 4B shows a part of the security element obtained by the plate of FIG. 4A.

The angle of inclination α ₁ of the flank 17A of the at least one line 16 of the reticle 14 is such that it forms an optical effect of light reflection that varies as a function of the viewing angle of the security element 12. Gradually change along 16).

Indeed, this gradual change is a sinusoidal type.

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

In the two embodiments of FIGS. 3B and 4B, the pitch L _{2 of} each line is equal to the colored pitch P ₁ of FIG. 2.

4B also shows the colored grid of FIG. 2.

5A shows a top plan view under a microscope of a security element incorporating both colored and modified reticulated patterns.

This variant is embodied in accordance with the embossing of the support, in particular the so-called embossing stamp technique, in particular intaglio.

This figure shows the presence of successive color bands, in particular an overlap of three different colors.

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

In this figure, the eye of the observer is indicated by reference numeral 15, which sees the security element laterally under strong light.

The periodic nature of the slope of the flanks is interpreted by two phenomena.

On the one hand, at an angle, the flanks are oriented perpendicular to the viewing angle, which maximizes the observed surface. On the other hand, the ridge covers the opposite flanks. As these ridges move periodically and the colors of the filaments of the bands are alternately exposed.

In addition, the constant plasticity of the paper is converted by the fact that the paper is deformed by embossing. However, by deforming the paper, the trajectory of the point running transversely through the embossed reticulated pattern is also expanded mathematically.

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

On the support, for example, in a line of constant cross section (perpendicular to the direction of extension of the reticulated lines), the blue filament is on the ridge and extends on either side of the ridge so that it moves along the line of the cross section. The blue filament then passes progressively from one side or the other as a function of the direction of displacement and leaves space for the continuous filament.

All these phenomena contribute to the appearance of colorful rainbow colors visible to the naked eye, ie the moiré effect reflected by the colors that make up the filament, thus authenticating the security element and the document to which it is attached.

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

Of course, the visual effect obtained depends on the height H of the reliefs, the period T of the sinusoidal development of the slope of the flanks of the reliefs and the pitch P of the angular change of the flanks.

Figure 6 shows that the reliefs of each line have an isosceles triangular cross section, and the latter ridges vary in height as a sinusoidal development.

In the embodiment of FIG. 7, the development of lines is used along the steps of a stairway of progressive height.

FIG. 8 shows an impression N in the form of a banknote formed by some of the bands oriented in an arc of a circle, in a reticulated pattern of colored bands. Together they constitute a C-shaped banknote image.

9 and 10 show a top view of an intaglio printing plate corresponding to the embodiment of FIG. 3A by electron microscopy. This plate is etched according to the patterns that complement the patterns to be created over the security element.

Likewise, FIGS. 11 and 12 show a top view of an intaglio printing plate corresponding to the embodiment of FIG. 4A by an electron microscope.

The following parameters preferably have values of the following indications:

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

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

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

The width Lf of the filament and the width Lb of the bands: preferably Lb = n × Lf (filament width) and n ≧ 2. Preferably n = 3 and Lf = Lg / n. If Lg is 400 µm and n = 3, Lf = 133,333 µm and Lb = 400 microns.

The difference width Lf is also possible provided that? Lf = Lg.

Lines embossed by periodic movement are not necessarily aligned in the transverse direction. They can be offset from line to line.

The color of the filaments can accumulate secondary level properties (fluorescent, phosphorescent, infrared, thermochromic, marker ink, etc.).

Claims (15)

A security element 12 for a soothing document 1 initially constructed by a planar support G, said security element comprising an embossed reticulated pattern 14 consisting of a plurality of lines 16, the relief Each of the lines 16 of has a profile F comprising gradual shape changes along a predetermined line 16 or from one line to another, wherein the reticulated pattern 16 is colored. In the security element 12 for (1),
The colored reticulated pattern 16 is constituted by repetition of successive bands 3 formed by filaments 120, 121, 122 of at least two adjacent or successive different colors B, R, J. And these bands (3) all have the same direction as the lines (16) of the reticulated pattern (14). The method of claim 1,
The changes, when observed according to an angle that is not perpendicular to the planar support G, cause the relief to hide part of the filaments 120, 121, 122, the part along the line 16 or one A security document for authentic documents, characterized in that it is configured to gradually change from a line of to another line to indicate a change in color and / or brightness. 3. The method according to claim 1 or 2,
According to the viewing angle perpendicular to the support G, the width of the filaments 120, 121, 122 is set such that the at least two colors B, R, J cannot be correctly distinguished from each other by the naked eye. Calming document security element. The method according to any of the preceding claims,
And said shape change is periodic, such as a change in height of the profile (F). The method according to any of the preceding claims,
The profile F comprises at least one flank 17A, 17B, each forming an inclination angle α ₁ with respect to a direction z perpendicular to the reticle 14, wherein the shape change is a security element. At least one line 16 of the reticulated pattern 14 along each of the lines 16 from one line 16 to another to form a reduced optical effect of the light reflection that varies as a function of the viewing angle of Or a change in the angle of inclination (a ₁ ) of the flank by at least two lines. 6. The method of claim 5,
The profiles generally have a triangular shape, two adjacent profiles each comprising a ridge 20 separated by a pleat 21, the shape change being a ridge between two adjacent pleats 21. A security document for authentic documents, comprising a change in position of 20 or a change in height H of ridge 20. 6. The method of claim 5,
Security element for authentic documents, characterized in that the corrugations (21) are parallel to the bands (3). The method according to any of the preceding claims,
The security element for authentic documents, characterized in that the width of the bands (3) is substantially the same as the width of the lines of relief (16). The method according to any of the preceding claims,
The width of said bands is 50 to 2000 μm, preferably 200 to 600 μm, more preferably 400 μm. The method according to any of the preceding claims,
Security element for authentic documents, characterized in that the filaments (120, 121, 122) of the colors forming the band (3) are the same width. The method according to any of the preceding claims,
Said bands (3) exhibit different orientations to construct at least one banknote image over at least a portion of their range. In the manufacturing process of the security element 12 according to any of the preceding claims,
An intaglio printing plate having a generally planar support (G) coated by the colored bands (120, 121, 122) and having at least one etched pleat in a shape that supplements the shape of the lines of the reticulated pattern 14 ( 4) manufacturing process of the security element, characterized in that the deformation by. Complaint document (1) comprising at least one security element according to any of the preceding claims. 14. The method of claim 13,
A complaint document, characterized in that the secure element (12) is integrated into or attached to the complaint document. The method according to claim 13 or 14,
A soothing document characterized in that it is made of paper, fiber material, plastic or a combination of at least two of these materials.

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