BG986U1 - Document security strip and secured document - Google Patents

Abstract

The invention relates to a document security strip comprising a support on which along the longitudinal direction of the strip alteration of metallized (51) and transparent regions are formed. The alteration permits the formation of a contrast on a scale of the document for securing, such as to provide a protection against reproduction of the documents with the security strip. The strip also comprises optically active elements in association with the regions, which are metallized (51), and/or those, which are transparent (52) on the strip to provide an optical effect on a scale called detailed with relation to the document for securing. The optical effect permits the production of a recognizable feature for identification of said document. The invention further relates to a security document incorporating the above strip.

Description

This utility model relates to a security strip of a document containing a medium on which, in the longitudinal direction of the strip, alternation of generally metallized regions and generally transparent regions is performed, allowing this alternation to achieve a scale-to-global contrast of the document for protection so as to constitute protection against the reproduction of the documents on which such a tape will be affixed.

The latter model also applies to secured documents in which such a tape is affixed to the utility model.

These documents can be, for example, fiduciary documents, such as bank notes, or official documents, and more.

BACKGROUND OF THE INVENTION

It is already known to place such tapes in secured documents.

Figure 1 shows a band 10 of the commonly known type.

This strip 10 contains a longitudinal longitudinal support on which metallized portions 11 are formed.

The tape may have a common multilayer structure.

These metallized portions are arranged in such a way that they are transparent to each other along the longitudinal direction of the strip (indicated by X) 12.

The arrangement of the sections 11 and 12 is realized in such a way that, along the longitudinal direction of the strip, there is an alternation of metallized sections 11 and transparent sections 12.

The metallized portions 11 form discrete metallic elements.

These portions may, for example, be smooth metallic portions reflectively reflecting.

The known type 10 strip forms a security mark; which can be attached to a document.

For example, pasting can be accomplished by transferring the entire tape document to the document with its carrier.

The transfer may in particular be effected by heating.

In this case the media should be transparent (at least for sections 12).

It is also possible to selectively transfer some sections of the strip (for example, metallized sections 11).

Other techniques can also be applied to tape a security document (stamping, etc.).

Figure 2 illustrates document 20 as a banknote to which a tape of the type of Figure 1 is affixed.

The metallized sections 11 of the tape are visible on the document and form a security mark.

It is explained that the metallized sections 11, after placing the strip on the banknote, can be coated with a lacquer, creating a visible effect for the naked eye. This lacquer may correspond, for example, to a layer of tape placed on the carrier of this tape.

An example of such a protective tape is described in EP 522 217.

Such security tapes form the trademark of the documents.

In particular, each metallized portion 11 forms a significant contrast with the transparent portions 12 which enclose it along the longitudinal direction of the strip.

And these stretches are chosen to be large enough for this contrast to match the scale contrast, called global, of the security document.

This global-scale contrast (or "macro-contrast") corresponds, in particular, to good protection against reproduction of the document in which the tape is to be placed (eg by means of photocopier).

The technical nature of the utility model

The object of the utility model is to improve the security level associated with document security strips of the general type described above.

Another object of the utility model is to provide distinctive meanings for secure documents that effectively complement the constructions mentioned above in relation to document reproduction protection.

In order to accomplish these tasks, the utility model offers, according to a first aspect, a security strip of a document comprising a carrier on which, in the longitudinal direction of the strip, alternation of generally metallized portions and of generally transparent portions is performed, allowing this alternation to contrast a scale called the security document so as to create protection against the reproduction of the documents in which the tape is placed. The tape also contains optically active elements connected to the generally metallized portions and / or the generally transparent portions of the tape to create, on a scale called detailed, at the level of the document the optical effect of the document allowing the distinguishing sign to be identified. document.

Preferred but not restrictive aspects of such a tape are the following. The resulting optical effect of the detailed scale is a contrast, in addition it has a visual effect depending on the angle of illumination and / or the viewing of the strip. On the generally transparent sections of the strap, a lacquer is placed, creating a brilliant effect visible to the naked eye. Active optical elements contain active optical structures formed by metallization. They contain optically variable elements. At least some of the active optical structures comprise one or more of the following security elements: a zone containing diffraction bands; fully reflecting metallized area; zone containing diffraction mat; an area containing a hologram; demetallized zone of a generally metallized section; printing area; metallized zone of a generally transparent section.

At least some of the active optical structures comprise different zones, some of which have at least one of the security features:

Some of the zones are small enough to not be immediately visible to the naked eye. Some of the active optical elements are placed on generally metallized sections. In addition, the active optical elements comprise a diffraction mat integrated into a diffracted metallized region.

The active optical elements comprise fully reflecting metallic regions.

The active optical elements also comprise fully reflecting metallized portions, which, along the longitudinal direction of the strip, are disposed on one and the other side of at least some of the generally metallized portions of the strip, the metallized portions being generally diffraction portions. For each generally metallized and diffraction region, on one side and on the other side of which are located fully reflecting metallized regions, the fully reflecting regions are located in an immediate adjacent manner to the common metallized and diffraction region.

For each metallic and diffraction region, on both sides of which are fully reflective metallic regions, the fully reflective regions are arranged in such a way that there is in the longitudinal direction of the strip an interval between the fully reflective region and the total metallic and diffraction region.

The interval is transparent, at least some active optical elements are placed on generally transparent regions, the active optical elements comprise fully reflecting metallized regions, which are arranged on one side and on the other side of at least some of the generally transparent regions of the band. For each generally transparent region, on both sides of which are fully reflecting metallized regions, the fully reflecting regions are located immediately adjacent to the generally transparent region, and for each generally transparent region, on both sides of which the fully reflecting metallized regions are arranged, the fully reflecting regions are arranged in such a way as to place in the longitudinal direction of the strip an interval between the fully reflecting region and the generally transparent region. The interval is: containing metallized and diffraction zones, and / or containing printing zones, and / or containing a diffraction mat, and / or containing a hologram.

The active optical elements are arranged for the repertoire of the generally metallized portions and / or the generally transparent portions of the strip, in addition the strip is affixed to fluorescent or absorbent motifs which are printed as a coating of the strip.

The printing is implemented as at least a partial coating of the generally metallized portions of the tape, or the printing is implemented as at least a partial coating of the generally transparent portions of the tape. Fluorescent

986 W or absorbent motifs are integrated inside the strap.

According to a second aspect, the utility also provides a security document comprising a tape according to one of the aforementioned aspects.

Explanations of the annexed figures

Other aspects may be understood from the following description of the utility model, made with reference to the accompanying figures, to which, in addition to Figures 1 and 2, already described above:

Figure 3 is a schematic representation of a first embodiment of a document security strip according to the utility model;

Figure 4 is a schematic representation of a second embodiment of a document security strip according to the utility model;

5a and 5b schematically show two particular embodiments of the utility model;

Figure 3 schematically shows a document security bar 30 according to the utility model.

Examples of implementation of the utility model

The strip 30, as well as the set of document security strips according to the utility model, have the general characteristics mentioned above with respect to Figure 1.

Along the longitudinal direction of the strip, alternation (it is made clear that the term "alternation" means, in the sense of this text, successive "successive repetition") of: generally metallized sections 31, and generally transparent sections 32.

In the case of security tapes according to the utility model as well as tapes of the known type described in reference to Figures 1 and 2, the tape may be affixed to a security document by transfer, by embossing or otherwise.

Figure 3 shows that the generally metallized sections 31 are mounted on additional elements.

More specifically, these additional elements are active optical elements 310.

Referring to the other figures, it can be seen that different types of active optical elements of the security band may be fitted, according to the utility model.

In any case, the active optical elements may be represented by numbers or letters.

These active optical elements can meet any desired predetermined graphics.

In the case of Figure 3, the active optical elements 310 appear in the form of numbers (these figures may, for example, correspond to the value of the banknote).

Active optical elements 310 may, in combination with their background (in the case of Figure 3, the generally metallized sections 31), have a certain optical effect.

This optical effect may correspond to a contrast or a visual effect depending on the angles of illumination and / or observation of the strip. This will be the case when the active optical elements are implemented as diffraction holographic motifs.

The transparent sections 32, which are located between the metallized sections 31, will preferably be coated with a glossy lacquer effect visible to the naked eye.

Of course, the metallized sections 31 and the transparent sections 32, which are represented in the figures in the form of rectangles, can in principle have any desired geometric shape.

However, the geometry of the metallized sections of the tape must, in principle, be of sufficient size and density to allow it to perform an effective protective function against reproduction.

Such a solution is known from EP 522 217, which describes an example of a strip meeting such size and density conditions.

Returning to the specific example of Figure 3, the active optical elements are therefore composed internally of generally metallized regions 31, which may be fully reflecting metallized regions.

There may also be sections containing a diffraction strip, a hologram, or other means of altering the general aspect of the section 31.

In all cases, the active optical element 310 has optical properties that are different from those of the generally metallized region 31, in such a way as to obtain such an optical effect as mentioned.

986 W

The active optical element 310 may have a homogeneous structure.

It can also be accomplished by metallization.

Active optical elements 310 may also contain variable optical elements.

"Variable optical elements" means elements whose properties can be varied according to the angle of illumination and / or observation. In particular, these are diffraction structures and / or holograms.

Variable optical elements are therefore active optical elements of a special type.

Active optical elements 310 may be composed of one of the following security elements: a zone comprising a diffraction strip; fully reflecting metallized area; zone containing diffraction mat; an area containing a hologram; demetallized zone of a generally metallized section; printing area.

And these active optical elements 310 may also be implemented in the form of structures containing more such security elements as mentioned.

In principle, thus active optical elements produce an optical effect on a smaller scale than the global scale, resulting in a contrast effect between metallized regions 31 and transparent regions 32.

This optical effect is realized on a scale called detailed. The active optical elements 310 thus produce optical effects located in the band 30.

They allow the observer to detect the presence of an active optical element, thereby allowing identification and verification of the document on which the tape is affixed.

The active optical elements 310 shown in Figure 3 are quite large to be easily seen with the naked eye.

It is also possible that such active optical elements are small enough to not be immediately visible to the naked eye.

In this case, only a careful examination of the document can indicate the presence of these active optical elements and lead to the document being checked.

In Figure 3, the active optical elements 310 are positioned to retract the metallized portions 31 of the strip.

"Repertoire" refers to the feature according to which the active optical motifs 310 are systematically arranged against the generally metallized regions.

It is also possible to place such active optical elements on the generally transparent portions of the tape. In this case too, this placement can be done opposite.

Figure 3 presents an embodiment of the utility model in which the active optical elements 310 are placed on generally metallized regions.

Active optical elements may be composed of or contain a diffraction mat.

A diffraction mat zone is determined which deflects light according to a single wavelength in all directions of space. Such a diffraction mat for the observer appears to have the same aspect regardless of the illumination angle and / or the observation of the mat.

In one embodiment, in Figure 3, the active optical element 310 may be a diffraction mat in a metallized region 31, which may be separately diffractive.

And the active optical elements 310 may also be composed of or contain fully reflecting metallized regions.

According to a particular embodiment corresponding to the schematic representation of Figure 5a, such active optical elements made in the form of fully reflecting metallized portions may be arranged along the longitudinal direction of the strip on one side and on the other side of at least some generally metallized portions of the strip.

And the metallized portions of the strip may in this case still be diffraction portions.

Figure 5a presents: an alternation of: generally metallized portions 51 that can be separately diffracted, and generally transparent portions 52, and zones 53 corresponding to active optical elements, which are made in the form of fully reflecting metallized portions.

The sections 53 (Fig. 5a) are located

986 W in a manner immediately adjacent to the metallized portion 51, on one side and on the other side of which they are located.

It is also possible, according to the illustrated embodiment of Figure 5b, to provide that the zones 53 corresponding to the active optical elements are arranged in such a longitudinal direction of the strip that there is an interval between each fully reflecting portion 53 and the metallized total section 51 to which it is affixed.

Figure 5b shows such intervals 54.

These intervals may, for example, be transparent.

Figure 4 illustrates another embodiment of the utility model.

It is explained that the set of features that were mentioned in relation to: total metallized sections and generally transparent sections, active optical elements, and the affixing of the security document tape are applicable to this embodiment as well as to all methods of implementation. implementation according to the utility model.

In the case of the strip 40 shown in Figure 4, the active optical elements 420 are mounted on generally transparent portions 42 of the strip.

The tape further comprises generally metallized sections 41.

Therefore, in this case, the active optical elements 420 may take different forms.

In this embodiment, the active optical elements may further correspond to a metallized region of the transparent region 42.

The active optical elements can also be made in the form of fully reflecting metallized regions.

In another embodiment, it may be possible to provide the active optical elements in the form of fully reflecting zones located on one side and on the other side of at least some transparent portions of the strip.

Active optical elements, in the form of fully reflecting portions, may also be arranged in such a way that they are immediately adjacent to the transparent portion to which they are affixed.

According to an embodiment not shown in the figures, it is also possible to place in the longitudinal direction an interval between each fully reflecting portion and the generally transparent portion to which it is affixed.

Such an interval may separately be: an interval containing metallized and diffraction zones, and / or an interval containing printing zones, and / or an interval containing a diffraction mat, and / or an interval containing a hologram.

According to an embodiment of the utility model, it is also possible to affix fluorescent or optically absorbent motifs to the protective strip.

In particular, such motifs may be printed as tape cover.

This printing can be done before the security document bar is inserted or after.

This printing may be designed to: cover (at least partially) generally metallic portions of the tape; cover (at least in part) generally transparent sections of the tape; to cover (at least partially) simultaneously metallic sections and generally transparent sections of tape.

It is also possible to integrate such fluorescent or absorbent motifs within the band.

This can be accomplished, for example, by placing in the thickness of the multilayer structure of a strip of layer containing such motifs.

The utility model enhances the security level associated with known security tapes, such as those described in Figures 1 and 2, precisely by allowing the identification and verification of the document on which the tape is affixed.

The various ways and embodiments of the utility model presented can be combined with one another.

In particular, it is possible to provide for the placement of active optical elements simultaneously on generally metallized regions and on generally transparent regions of the strip.

It is also possible to position active optical elements extending simultaneously on a generally metallized region and an adjacent generally transparent region to obtain the desired optical effect from the active optical element.

Claims (28)

1. A security strip of a document comprising a carrier on which, along the longitudinal direction of the strip, an alternation of generally metallized regions and of generally transparent regions is formed, allowing the alternation to obtain a global-scale contrast of the protected document so as to constitute protection against the reproduction of the documents to which such tape will be affixed, characterized in that the tape also contains active optical elements placed on generally metallized portions and / or generally transparent portions of the tape for Preparation in detailed scale of the security document an optical effect for obtaining identification mark of the document. Document document security strip according to claim 1, characterized in that the optical effect obtained on a detailed scale is a contrast. Document document security strip according to one of the preceding claims, characterized in that the optical effect obtained on a detailed scale is a visual effect depending on the angles of illumination and / or the observation of the tape. Document security tape according to one of the preceding claims, characterized in that the generally transparent sections of the tape are connected to a glossy lacquer effect visible to the naked eye. Document security tape according to one of the preceding claims, characterized in that the active optical elements comprise active optical structures formed by metallization. Document security strip according to one of the preceding claims, characterized in that the active optical elements comprise optically variable elements. Document security strip according to one of the two preceding claims, characterized in that at least some of the active optical structures comprise one or more of the following security elements: - zone containing diffraction strip, - fully reflecting metallic strip, - zone containing diffraction mat, - an area containing a hologram, - demetallized zone of total metallized area, - area containing printing, - metallized zone of a generally transparent area. Document document security strip according to claim 7, characterized in that at least some of the active optical structures contain different zones, some of which contain at least one of the security elements. A document security strip according to claim 8, characterized in that at least some of the zones are small enough to be immediately visible to the naked eye. 10. Document security strip according to one of the preceding claims, characterized in that at least some of the active optical elements are placed on generally metallized regions. Document security strip according to claim 10, characterized in that the active optical elements comprise a diffraction mat integrated into a diffraction metallized region. Document document security strip according to claim 10, characterized in that the active optical elements contain fully reflecting metallized regions. 13. Document security strip according to claim 12, characterized in that the active optical elements comprise fully reflecting metallized portions, which along the longitudinal direction of the strip are located on one side and on the other side of at least some of the generally metallized portions of the strip, the metallized regions being generally diffraction regions. A document security strip according to claim 14, characterized in that for each generally metallized and diffraction region, on one side and on the other, of which the fully reflecting metallized regions are arranged, the fully reflecting regions being arranged in a manner immediately adjacent to the generally metallized and diffraction region. 15. Document security strip according to claim 13, characterized in that for each generally metallized and diffraction region on one side and on the other side of which are 986 Ul located fully reflecting metallized regions, fully reflecting metallized regions are arranged in the longitudinal direction of the strip in such a way that there is an interval between the fully reflecting metallized region and the generally metallized and diffractive region. Document document security strip according to claim 15, characterized in that the interval is transparent. Document security strip according to one of the preceding claims, characterized in that at least some of the active optical elements are arranged in generally transparent regions. 18. Document security strip according to the preceding claim in combination with claim 12, characterized in that the active optical elements comprise fully reflecting metallized portions which are located on one side and on the other side of at least some of the common the transparent sections of the tape. 19. A document security strip according to claim 18, characterized in that for each generally transparent section, on one side and on the other side of which are fully reflecting metallized portions, the fully reflecting metallized portions are arranged in a manner immediately adjacent to total transparent area. 20. A document security strip according to claim 18, characterized in that for each generally transparent section, on one side and on the other, of which the fully reflecting metallized portions are arranged, the fully reflecting metallized portions are arranged in such a way that they are positioned in the longitudinal the band direction is the interval between the fully reflecting portion and the generally transparent portion. 21. Document security strip according to claim 20, characterized in that the interval is: - interval containing metallized and diffraction zones, and / or - interval containing print areas, and / or - interval containing diffraction mat, and / or - an interval containing a hologram. 22. Document security band according to one of the preceding claims, characterized in that the active optical elements are arranged for the reference of the generally metallized portions and / or the generally transparent portions of the tape. A document security tape according to one of the preceding claims, characterized in that the tape is furthermore luminescent and absorbent. A document security tape according to claim 23, characterized in that the fluorescent or absorbent motifs are printed as a coating of the tape. A document security strip according to claim 24, characterized in that the printing is designed to cover at least partially the metallized portions of the tape. A document security strip according to claim 24, characterized in that the printing is designed to cover at least a portion of the generally transparent portions of the tape. A document security strip according to claim 23, characterized in that the fluorescent or absorbent motifs are integrated within the tape. A security document on which a tape is attached according to one of the preceding claims.