DE19934434B4 - Value and security certificate with microchannels - Google Patents

Abstract

The invention relates to a value and security document with perforation, in which microchannels are arranged as additional security and authenticity proof.

Description

The The invention relates to a value and security document with microchannels the preamble of claim 1.

Such a value and security document is, for example, with the subject of DE 36 28 353 A1 has become known in which it is already known to introduce a corresponding perforation by means of a laser for personalizing a document. However, such perforations are introduced only perpendicular to the document level in the document and penetrate the document. Disadvantage of the invention cited in the document, however, is that a uniform appearance of the perforations results, regardless of the viewing angle from which the document is viewed.

In the publication DE 82 10 186 U1 describes a usable as a printing card ID card, in which a laser-beam pen a relief-like structure is generated on the card surface. This relief is created by the irreversible micro-gas structure generated in a foamable plastic layer by means of laser energy. However, this structure in most cases has no opening to the surface of the ID card so that it can not serve to produce externally visible images.

In the pamphlets EP 0 308 904 B1 and DE 29 01 265 A1 Data carriers are described which have depressions which have been produced by embossing or pressing. These depressions are in the in DE 29 01 265 A1 described object filled with a magnetic fluid and sealed with a transparent film. These depressions can be recognized as such when viewing the data carrier from above. Other safety-enhancing effects are not realized by these structures.

In the publication DE 199 19 638 A1 is an advertisement of prices, article designations and similar information described on goods carriers, which consists of a plurality of parallel to the surface and arranged along a Informati onszeile micro-channels. To display multi-line information of prices and item designations, the channels contain a flowing, contrast-generating fluid, each channel being assigned a pumping system, a mixer and, for a fluid type, a flow-measuring channel synchronizing the fluid flow. The outputs of the view channels lead via a manifold to a common storage tank or separator.

Value documents with small, through the entire document or through a layer of the document passing, arranged perpendicular to the surface openings are in the publications DT 22 05 428 A1 . CH 535 134 C and DE 16 32 482 B described.

Of the The invention is therefore based on the object, the formation of a Value and security document with perforations so that there are increased safety requirements equivalent.

to solution the task is the invention by the technical teaching of claim 1.

essential Feature of the invention is that in the value and security document microchannels are arranged in introduced at different angles to the surface of the document are.

With the given technical teaching gives the essential advantage that now differently inclined perforations are introduced into the document can. Because of the variability the invention Foreseen perforations, this term is not in the following More used and instead the parent term "microchannel" used. With this Term is meant that such microchannels can only partially extend into the document and that these Microchannels one can have any profiling. You can be round, angular, oval or polygonal.

It Thus, in the context of the present invention does not come to cylindrical perforations but such micro-channels (as understood in the following) can have any cross-sectional profiling.

Of course, such microchannels also have a non-circular profiling or rotationally symmetric Profiles, such as, a shamrock profiling, a achtförmige profiling or similar profiles more.

With the given technical teaching, there is now the advantage that now creates a viewing angle-dependent surface texture due to the given micro-channels for a value and security document. If one looks at the surface of the value and security document, for example, from the left side in a viewing angle of 60 °, then only those microchannels are clearly visible whose longitudinal axis is approximately at this angle lies and is aligned approximately to this angle.

For the good Visibility of said microchannels, it plays a role in what diameter ratio the respective microchannel is at the depth of the microchannel.

such microchannels can by embossing, laser technology (Laser ablation), by etching or by mechanical perforation. Likewise, such microchannels by mechanical embossing in combination with ultrasound exposure.

The Invention leaves Furthermore open, whether the microchannels the document completely enforce or only partially protrude into the document. This results in various other improvements in counterfeit security in multilayer documents, as will be explained later.

at the proposed tilting technology with micro-channels in the present Invention thus results in that of an observer position, obliquely on the surface of the Document that recognizes a microchannel image or microchannel pattern is while seen from the other observer position, also in one another angle to the document surface must be another Microchannel image is recognizable. It is therefore intended that several of different sides of more or less easily recognizable microchannel images form by a corresponding arrangement of the microchannels. These microchannel images can have different motives.

such Microchannel images need not only necessarily be alphanumeric information, but you can also display image information.

Of the Effect thus arises from the fact that you have different perspectives recognizes different images. Another improvement in counterfeit security arises when at the bottom of the microchannel another information element is arranged. In this case, for example, at the bottom of the microchannel, i.e. so at the medium border of the value and security document, another layer may be arranged whose surface is the ground of the microchannel forms.

By different perspectives on each differently inclined microchannels can thus different information respectively at the bottom of the microchannel be recorded.

such Information can Be color information, or stamping information or other encodings, which are then only under that particular angle become visible.

A further improvement of counterfeit security arises when such micro-channels through different layers of a value and security document. Here is it - like executed - not necessary that the microchannels enforce all layers; The microchannels can also be in different Layer depths of the multilayer document end.

These For example, safety technology prevents such a multi-layered Document can not be separated comprehensible. Will it be in the Separated area of a layer boundary, then the corresponding Microchannels which were previously aligned, separated, and when the document is reassembled, can then no longer ensured be that again aligned, merging microchannels throughout the document.

such microchannels can Of course also filled with different media. Such a filling may e.g. a gas filling, a liquid Filling, a solid filling (eg by powder) or other solid fillings, such as. by printing ink, by plastics, by glue or the like.

Become such microchannels filled by solids, in particular by polymers, there is the advantage that they against Pollution are protected.

In In another embodiment, this filling of the microchannels (the then as possible closed on both sides) also made of safety-relevant materials exist, such as gaseous detectable substances, fluorescent or luminescent Substances (gases or solids), magnetised materials, such as magnetic particle and more.

Become these microchannels filled with substances, that are at least transactional and one of the value and security document have different refractive index, lens effects can so be achieved.

The viewing angle-dependent Otherwise, supervision of a corresponding security and value document does not depend only from the angle of view to the plane of the document.

Embodiments are provided which provide for a spatial separation of the microchannels, although these microchannels are arranged perpendicular to the document plane. Here it is sufficient if an observer with a vertical angle to Document level shifts this viewpoint parallel to the surface of the document to accommodate different information from different but rectified microchannels.

In In another embodiment of the invention, it is provided that at least a surface of the security and value document is covered by a foil or by a printing layer that is not necessarily transparent have to be. For example, using a film or a print layer, which is only IR-transparent, then through this print layer the underlying microchannels not visible anymore. If, however, such a document in the reflected light illuminated by a corresponding IR source, then the overlapping Print layer or film transparent and the underlying microchannels are recognizable.

The microchannels and the corresponding microchannel image is then no longer recognizable and only by the illumination by means of another radiation source to make visible.

Of the Subject of the present invention does not arise only from the subject matter of the individual claims, but also from the combination the individual claims among themselves.

in the The following is the invention with reference to several execution paths illustrative drawings closer explained. Here are more from the drawings and their description Essential to the invention features and advantages of the invention.

It demonstrate:

1 FIG. 1 schematically shows a section through a value and security document in a first embodiment, FIG.

2 : the top view of the document behind 1 from a first perspective,

3 : the top view of the document behind 1 from a second perspective,

4 : the cut through a value and security document with different layers,

5 : the section through a value and security document with additional, just formed microchannels,

6 : the cut through a multi-layered value and security document,

7 : a further embodiment of a value and security document with sealed microchannels,

8th : a section through a value and security document with filled microchannels,

9 : The representation of various embodiments of the shaping and channeling of different microchannels through a multi-layered value and security document.

In 1 is a value and security document 1 shown in which several differently directed microchannels 2 . 3 . 4 are arranged. The microchannels 2 In this case, for example, be arranged at an angle of 30 ° to 60 ° at an angle to the surface of the document, while the microchannels 3 in the opposite Winket of 30 ° to 60 ° the former microchannels 2 arranged in opposite directions.

It can about that In addition, even vertical microchannels are arranged, whose longitudinal axis perpendicular to the surface value and security document.

It can a variety of different-directional micro-channels available be.

The fat 27 of the value and security document is related to the depth and cross section of the microchannel 2 - 4 ,

In this case, it is preferred if the visual axis 28 is aligned with the longitudinal axis of the microchannel.

Furthermore, it is preferred if the depth (length) of the microchannel 2 - 4 is selected in relation to the profile shape that the front and top edge 25 of the microchannel perpendicular to the lower and rear edges 26 stands.

It is thereby through the walls of the microchannel 2 - 4 an angle 31 defined in the area of the visual axis 28 should lie.

The viewing axis should therefore be directed so that they pass through the channel 2 - 4 goes through and does not hit the channel side walls.

In addition, the angle should be 31 from the other, in opposite angle inclined, microchannels 3 deviate so that there is no overlap. So it should be from an observer 5 for example only the microchannels 3 be recognizable while from the observer 7 only the microchannels 2 are recognizable.

It is also possible by means of an observer 6 the microchannels 4 visible from above, while the other microchannels 2 and 3 are no longer visible.

Of course, the microchannels 2 - 4 be introduced into the document that even with rotation of the document about its axis 32 according to 1 different microchannels 2 - 4 are visible.

In 4 is shown that the value and security document 1 may also consist of several layers, in the present embodiment, only a single film 12 as a base under the value and security document 1 is shown. The top of this slide 12 is provided with a specific print image, which printed image carries different information elements on its surface. Such information elements can either consist of color or be embossed or other information elements.

It is important that when looking at the value and security document from the observer 7 from the respective channel bottom of the microchannel is visible and the information located there information 10 on the top of the slide 12 are applied. On the other hand, consider the value and security document 1 from the direction of the observer 5 , the other information elements 11 visible, noticeable.

In 5 is shown that the visual axis 28 of the respective observer 5 . 7 does not necessarily have to be at an angle to the surface of the value and security document. Here it can be seen that by means of a dividing line 33 the different microchannels 2 . 3 spatially separated from each other on the value and security document can be arranged, but in this case the longitudinal axis of the respective microchannel 2 . 3 perpendicular to the surface of the document.

Are now the two micro-channel groups 2 . 3 far enough separated from each other spatially, then succeeds the observer 5 , only the microchannels 2 while he sees the microchannels 3 can no longer see because he would have to look at them from an oblique angle and then they are no longer visible to him, because he sees only on the channel wall, but no longer recognizes in the see.

It is therefore important in this embodiment, the micro-channel groups with the micro-channels 2 . 3 so far spatially separate from each other that either only one micro-channel group with the microchannels 2 or other microchannel group with the microchannels 3 is visible from above.

In 6 It is shown that the value and security document can be multilayered and, for example, from the layers 14 . 15 which are laminated together. The microchannels 2 . 3 go completely or partially through.

If one separates now in counterfeit intention the layers 14 . 15 for example in the area of the split level 16 and try the so separated layers 14 . 15 put together again, then this will no longer succeed so that the micro-channels 2 . 3 of different layers 14 . 15 aligned with each other, and therefore such forgery will be easily recognizable.

The 6 shows, moreover, that the microchannel 2 also a corresponding filling 13 may have, which filling may consist of a transparent or partially transparent (opaque) mass. The filling is shown here by the example of an extending perpendicular to the surface, additional channel.

So far the refractive index of this filling of the refractive index of the value and If the security document deviates, this can also be a lens effect be generated. This means, In plan view of the microchannel magnification effects can be achieved or it can even in the manner of a converging lens arranged at the bottom of the canal Information enlarged by the microchannel is shown upwards towards the observer become.

Otherwise, the filling shown serves 13 also to protect the microchannels 2 . 3 against corresponding pollution.

In addition, it may be provided that a corresponding cap 17 over the filling 13 is arranged, which cap can either give the lens structure or results in a corresponding embossed structure, whereby additionally a Braileffekt is achieved.

In 7 is shown by an additional, perpendicular to the surface extending microchannel that the either filled or unfilled microchannels 2 at its top and / or bottom with a layer 18 can be covered. This layer 18 may be a film, a printing ink or other cover, this layer 18 does not necessarily have to be transparent. If, for example, it is merely transparent to IR, then there is the effect that the microchannels hidden underneath are invisible to the eye. However, this value and security document 1 exposed with an IR radiation source, then the layer 18 permeable and the hidden microchannels become visible.

A special effect follows 8th with an additional, perpendicular to the surface running micro-channel then, if an upper and lower film 19 covers the entire surface of the value and security document at least in the area of the microchannels. These are then also protected against contamination, the film 19 either transparent or partially transparent to visible light.

In this embodiment, there is the advantage that the microchannels 2 with any fillings 20 can be filled. Such fillings can be formed gaseous, powdery, solid continuous or partially filled.

It can also be a liquid filling or a filling from a solid and a gaseous one Medium be provided.

In 9 It is shown that in multi-layer value and security documents, the depth of the microchannels need not necessarily be aligned with the layer boundary of the micro-channels laminated together.

Here it is shown, for example, that the microchannel 2 with its channel bottom 21 on the layer boundary between the layers 14 . 15 ends and that at this point a particular information element can be arranged.

The microchannel 2c ends, for example, in the area of the layer 14 so that so a good visibility of the microchannel 2c is possible because only at the channel bottom 24 the coloring of the total existing layer 14 becomes visible.

At the channel bottom 21 this can be the coloring of the layer 15 be made visible.

The same applies to the microchannel 2a that is on the layer boundary between the layer 1 and the layer 14 ends, but also on this channel bottom 22 a corresponding information element can be arranged, which either to the surface of the layer 14 or to the bottom of the layer 1 belongs.

The same applies to the oblique microchannel shown here 2 B for example, at the layer boundary between the layers 15 and 14 ends and also at the forming there channel bottom 23 an information element may be arranged, which is either part of the layer 15 or part of the layer 14 is.

Of course, according to 10 also the microchannels taper, ie they are tapered in the direction of the viewing axis. One can thereby increase the fineness substantially, because it depends only on the size of the opening at the bottom of the value and security document, which thus very fine perforations can be achieved.

The micro hole 34 at the bottom of the value and security document 1 can therefore be drilled much finer, or be attached, if one starts from conventional lasered microchannels.

The thus slanted micro-channel 35 becomes visible laterally from larger angles, but the microhole 34 at the bottom is created smaller.

Such a microchannel 35 can be filled with much larger volume, which is desired for various applications. In addition, highly viscous materials can be filled, because these are due to the smaller micro-hole 34 can not flow through.

It is thus funnel-shaped Microchannels which conically narrow in the direction of the viewing axis.

1

Value- and security document

2

microchannel (variable depth)

3

microchannel (variable depth)

4

microchannel (variable depth)

5

observer

6

observer

7

observer

8th

Microchannel pattern

9

Microchannel pattern

10

information element (Color or coding)

11

information element (Color or coding)

12

foil

13

filling

14

layer

15

layer

16

cleavage plane

17

cap

18

layer

19

foil

20

filling

21

channel base

22

channel base

23

channel base

24

channel base

25

edge

26

edge

27

thickness

28

line of sight

29

edge

30

edge

31

angle

32

axis

33

Dividing line

34

micro hole

35

microchannel

Claims (16)

Value and security document ( 1 ) having microchannels disposed therein and / or thereon, characterized in that a first and an at least second group of microchannels ( 2 . 35 ), wherein the axis of the first group of microchannels is arranged at a different angle to the surface of the value and security document than the axis of the second group of microchannels, so that through the first group of microchannels a first microchannel image ( 8th ) at a first viewing angle on a first viewing side and by the second group of microchannels a second microchannel image (differing from the first microchannel image) ( 9 ) is recognizable at a different viewing angle from the first viewing angle on the first viewing side. Security and security document according to claim 1, characterized in that the value and security document consists of several layers, wherein the microchannels pass through at least two of these layers at least partially, so that when the value and security document is separated ( 1 ) in the region of a layer boundary corresponding to the microchannels ( 2 . 35 ), which were previously aligned, are separated from each other, and when the document is recomposed, it can no longer be ensured that in turn aligned, merging into each other microchannels ( 2 . 35 ) are present throughout the document. Value and security document according to one of the preceding claims, characterized in that the microchannels ( 2 . 35 ) are only partially incorporated into the value and security document ( 1 ) extend into it. Value and security document according to one of the preceding claims, characterized in that at the bottom of the microchannel ( 2 . 35 ), ie at the medium limit of the value and security document ( 1 ), another layer is arranged. Security document according to claim 4, characterized in that the additional layer ( 10 . 11 ) Contains information in the form of color. Value and security document according to one of claims 4 to 5, characterized in that the additional layer ( 10 . 11 ) Contains information in the form of embossing information. Value and security document according to one of the preceding claims, characterized in that the microchannels ( 2 . 35 ) in different layer depths of a multilayered document. Value and security document according to one of the preceding claims, characterized in that the microchannels ( 2 . 35 ) are filled with solid media. Value and security document according to one of the preceding claims, characterized in that the microchannels ( 2 . 35 ) are filled with gaseous media. Value and security document according to one of the preceding claims, characterized in that the microchannels ( 2 . 35 ) are filled with liquid media. Value and security document according to one of the preceding claims, characterized in that the microchannels ( 2 . 35 ) are filled with solid and gaseous media. Value and security document according to one of the preceding claims, characterized in that the microchannels ( 2 . 35 ) are filled with substances which have a different refractive index from the value and security document. Value and security document according to one of the preceding claims, characterized in that the microchannels ( 2 . 35 ) are round. Value and security document according to one of the preceding claims, characterized in that the microchannels ( 2 . 35 ) are oval. Value and security document according to one of the preceding claims, characterized in that the microchannels ( 2 . 35 ) are angular. Value and security document according to one of the preceding claims, characterized in that the microchannels ( 2 . 35 ) have rotationally symmetric profiles.