CA2866532C - Tactilely detectable security feature for value documents - Google Patents
Tactilely detectable security feature for value documents Download PDFInfo
- Publication number
- CA2866532C CA2866532C CA2866532A CA2866532A CA2866532C CA 2866532 C CA2866532 C CA 2866532C CA 2866532 A CA2866532 A CA 2866532A CA 2866532 A CA2866532 A CA 2866532A CA 2866532 C CA2866532 C CA 2866532C
- Authority
- CA
- Canada
- Prior art keywords
- tactilely detectable
- structures
- security feature
- tactile
- substrate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000758 substrate Substances 0.000 claims abstract description 39
- 210000005224 forefinger Anatomy 0.000 claims description 6
- 210000003813 thumb Anatomy 0.000 claims description 6
- 238000000034 method Methods 0.000 description 25
- 238000007639 printing Methods 0.000 description 21
- 238000004049 embossing Methods 0.000 description 18
- 239000000976 ink Substances 0.000 description 14
- 239000004922 lacquer Substances 0.000 description 9
- 238000007650 screen-printing Methods 0.000 description 7
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 6
- 239000011888 foil Substances 0.000 description 6
- 238000012546 transfer Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000011127 biaxially oriented polypropylene Substances 0.000 description 2
- 239000011230 binding agent Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008447 perception Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004438 eyesight Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000001850 reproductive effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/324—Reliefs
Abstract
The invention relates to a security feature for value documents, in particular bank notes, identification cards and the like, wherein the security feature has at least two tactilely detectable structures which are located on at least one side of a substrate of' the value document. Each of the at least two tactilely detectable structures has a tactilely detectable surface condition, wherein the surface condition of at least two tactilely detectable structures differs. According to the invention, the sum of the areas of the at least two tactilely detectable structures amounts to at least 30%, preferably at least 50%, based on the total area of one side of the value document.
Description
Tactilely detectable security feature for value documents This application claims priority based on German Patent Application 10 2013 019 665.5 entitled -TACTILELY DETECTABLE SECURITY FEATURE FOR VALUE
DOCUMENTS" filed November 22, 2013.
This invention relates to a security feature for value documents, in particular bank notes, identification cards and the like, wherein the security feature has at least two tactilely detectable structures which are located on at least one side of a substrate of the value document. Each of the at least two tactilely detectable structures has a tactilely detectable surface condition, wherein the surface condition of at least two tactilely detectable structures differs.
For protection against imitation, in particular with color copiers or other reproductive methods, value documents, such as for example bank notes, papers of value, credit cards or identification cards, passports, deeds and the like, labels, packages or other elements for product authentication are equipped with security elements having tactile structures.
For example, there is known from EP 2599637 A2 a data carrier, in particular value document, such as a bank note, identification card and the like, having a substrate which has at least one paper layer and which is covered by a polymeric cover layer on both sides respectively over the full area. The substrate and the polymeric cover layer have substantially congruently disposed, tactilely detectable embossed structures which are produced by the action of an embossing tool on the polymeric cover layer and the substrate, and which have a relief height of 20 gm to 400 gm altogether.
To ensure good haptic recognizability for virtually all groups of persons, the tactile structure must have at least a certain height. Ideally, a tactile structure should have a height of more than 50 gm, preferably more than 80 gm, and particularly preferably more than 120 gm. This ensures that the perception threshold for tactilely detectable elevations is exceeded, and a user brushing over the tactile structures with his fingertip can feel them as elevations relative to the surrounding substrate surface. A tactile structure can thus be haptically perceived independently of its optically Date Recue/Date Received 2021-02-02 =
perceptible appearance, so that the value document can also be clearly recognized and checked for its authenticity by persons with limited or diminished eyesight.
In principle, tactile structures are applied to a substrate by means of embossing methods, printing methods or transfer methods or by means of a combination of these methods. Furthermore, tactile structures can also be applied to a substrate by means of laser radiation, with the laser radiation breaking open the surface of the substrate or making the substrate swell.
Embossing methods are methods that are also common for value documents, for producing tactile structures. The embossing is dependent not only on the form of the embossing stamp but also on the quality of the substrate.
Thus, paper-based substrates can normally be partially deformed by an embossing process well. The embossing height usually lies between 50 rim and 80 rim in bank notes made of paper using an embossing stamp with an embossing depth of 120 rtm. In bank notes comprising a plastic-based substrate, for example biaxially oriented polypropylene (BOPP), however, the molding height lies only between 20 una and 50 rim, thus being only about half as high as in paper bank notes and below or at the perception threshold for tactile structures.
Embossing is normally effected in bank notes by means of the so-called intaglio printing process, in which an embossing stamp is pressed onto the substrate at high mechanical pressure. For tactilely detectable structures there are employed both classical ink-carrying intaglio printing, in which the depressions of the embossing stamp are at least partly filled with an ink, and so-called blind embossing, in which the depressions of the embossing stamp are not filled. In ink-carrying intaglio printing, the haptic experience is due to the elevation itself, but primarily to the partially different microroughness of the surface of the elevations, which is only slightly perceptible.
Furthermore, all embossing methods involve the disadvantage that the embossing of the substrate decreases through external influences, such as moisture, temperature and pressure, during the life or circulation of a bank note.
DOCUMENTS" filed November 22, 2013.
This invention relates to a security feature for value documents, in particular bank notes, identification cards and the like, wherein the security feature has at least two tactilely detectable structures which are located on at least one side of a substrate of the value document. Each of the at least two tactilely detectable structures has a tactilely detectable surface condition, wherein the surface condition of at least two tactilely detectable structures differs.
For protection against imitation, in particular with color copiers or other reproductive methods, value documents, such as for example bank notes, papers of value, credit cards or identification cards, passports, deeds and the like, labels, packages or other elements for product authentication are equipped with security elements having tactile structures.
For example, there is known from EP 2599637 A2 a data carrier, in particular value document, such as a bank note, identification card and the like, having a substrate which has at least one paper layer and which is covered by a polymeric cover layer on both sides respectively over the full area. The substrate and the polymeric cover layer have substantially congruently disposed, tactilely detectable embossed structures which are produced by the action of an embossing tool on the polymeric cover layer and the substrate, and which have a relief height of 20 gm to 400 gm altogether.
To ensure good haptic recognizability for virtually all groups of persons, the tactile structure must have at least a certain height. Ideally, a tactile structure should have a height of more than 50 gm, preferably more than 80 gm, and particularly preferably more than 120 gm. This ensures that the perception threshold for tactilely detectable elevations is exceeded, and a user brushing over the tactile structures with his fingertip can feel them as elevations relative to the surrounding substrate surface. A tactile structure can thus be haptically perceived independently of its optically Date Recue/Date Received 2021-02-02 =
perceptible appearance, so that the value document can also be clearly recognized and checked for its authenticity by persons with limited or diminished eyesight.
In principle, tactile structures are applied to a substrate by means of embossing methods, printing methods or transfer methods or by means of a combination of these methods. Furthermore, tactile structures can also be applied to a substrate by means of laser radiation, with the laser radiation breaking open the surface of the substrate or making the substrate swell.
Embossing methods are methods that are also common for value documents, for producing tactile structures. The embossing is dependent not only on the form of the embossing stamp but also on the quality of the substrate.
Thus, paper-based substrates can normally be partially deformed by an embossing process well. The embossing height usually lies between 50 rim and 80 rim in bank notes made of paper using an embossing stamp with an embossing depth of 120 rtm. In bank notes comprising a plastic-based substrate, for example biaxially oriented polypropylene (BOPP), however, the molding height lies only between 20 una and 50 rim, thus being only about half as high as in paper bank notes and below or at the perception threshold for tactile structures.
Embossing is normally effected in bank notes by means of the so-called intaglio printing process, in which an embossing stamp is pressed onto the substrate at high mechanical pressure. For tactilely detectable structures there are employed both classical ink-carrying intaglio printing, in which the depressions of the embossing stamp are at least partly filled with an ink, and so-called blind embossing, in which the depressions of the embossing stamp are not filled. In ink-carrying intaglio printing, the haptic experience is due to the elevation itself, but primarily to the partially different microroughness of the surface of the elevations, which is only slightly perceptible.
Furthermore, all embossing methods involve the disadvantage that the embossing of the substrate decreases through external influences, such as moisture, temperature and pressure, during the life or circulation of a bank note.
2 Tactile structures can also be produced by printing methods without simultaneous embossing of the substrate. Thus, tactile structures, such as for example brailles, can also be produced by means of screen printing. In this connection the tactile structures are usually built up in layers, by printing individual ink layers with relatively small thickness one over the other, resulting in a total thickness or height of 0.2 mm to 0.3 mm.
To obtain the required script height or tactility, UV-drying inks or lacquers are normally used. These inks or lacquers normally contain no, or only low, concentrations of volatile components, such as e.g. isopropyl alcohol (IPA), a colorless, combustible liquid.
Alternatively, the production of tactile structures is effected by means of a transfer method, in which the tactile structure is prefabricated on a carrier and subsequently transferred to the substrate. The transfer method involves high expense, however, so that this method is normally not used for value-document or bank-note printing.
The general effectiveness of tactilely detectable structures, for example of symbols for partially sighted or blind persons, is frequently limited in bank notes, however, by design stipulations from the customers (positioning and available space on the bank note) and very restricted by technically determined maximum relief heights (paper thickness of max. 120 um, risk of punching...) as well as the well-known relief reduction in circulation due to creasing, moisture, etc. For example, an EU
regulation requires that pharmaceutical packages (folding boxes) carry symbols having a minimum height of 300 ttm for partially sighted or blind persons. Such a height is necessary for obtaining reliable identification. In bank-note substrates, however, such a height is not realizable technically.
Furthermore, upon the authenticity check of bank notes by partially sighted or blind persons, the verification should take place, as with normal-sighted persons,
To obtain the required script height or tactility, UV-drying inks or lacquers are normally used. These inks or lacquers normally contain no, or only low, concentrations of volatile components, such as e.g. isopropyl alcohol (IPA), a colorless, combustible liquid.
Alternatively, the production of tactile structures is effected by means of a transfer method, in which the tactile structure is prefabricated on a carrier and subsequently transferred to the substrate. The transfer method involves high expense, however, so that this method is normally not used for value-document or bank-note printing.
The general effectiveness of tactilely detectable structures, for example of symbols for partially sighted or blind persons, is frequently limited in bank notes, however, by design stipulations from the customers (positioning and available space on the bank note) and very restricted by technically determined maximum relief heights (paper thickness of max. 120 um, risk of punching...) as well as the well-known relief reduction in circulation due to creasing, moisture, etc. For example, an EU
regulation requires that pharmaceutical packages (folding boxes) carry symbols having a minimum height of 300 ttm for partially sighted or blind persons. Such a height is necessary for obtaining reliable identification. In bank-note substrates, however, such a height is not realizable technically.
Furthermore, upon the authenticity check of bank notes by partially sighted or blind persons, the verification should take place, as with normal-sighted persons,
3 within fractions of seconds and virtually "subconsciously", also work with "normally"
worn bank notes, and do without additional auxiliary means.
The invention is therefore based on the object of developing a generic security element so as to remedy the disadvantages of the prior art and further increase the protection from forgeries.
This object is achieved by the features of the independent claims.
Developments of the invention are the subject matter of the dependent claims.
According to the invention, the sum of the areas or the at least two tactilely detectable structures amounts to at least 30%, preferably at least 50%, based on the total area of one side of the value document.
According to the invention, at least about one third, preferably at least one half and thus to a great extent the total surface of one side of a bank note is thus covered with specific textures. Regions of the surface of the bank note are thus covered with a respectively specific texture over a large area, in the order of magnitude of several square centimeters. These structures yield in sum a kind of large-area "texture bar code'' which can also be clearly associated with a denomination of a bank-note series by a partially sighted or blind person. It is essential here to produce at least two clearly distinguishable textures, such as for example a "rough/smooth" bar code, which define said association in their mutual placement. The different tactilities or surface conditions of such large-area structures can be detected especially well by partially sighted or blind persons. This is particularly preferably the case even when the height of the tactile structures relative to the substrate surface is not very pronounced, or at least lower than would be necessary for reliable tactile association of small-area tactile structures, for example with an area of a few square millimeters.
According to a preferred embodiment, a logical correlation of the structures on both sides of the substrate exists and can be clearly identified by a user.
This means
worn bank notes, and do without additional auxiliary means.
The invention is therefore based on the object of developing a generic security element so as to remedy the disadvantages of the prior art and further increase the protection from forgeries.
This object is achieved by the features of the independent claims.
Developments of the invention are the subject matter of the dependent claims.
According to the invention, the sum of the areas or the at least two tactilely detectable structures amounts to at least 30%, preferably at least 50%, based on the total area of one side of the value document.
According to the invention, at least about one third, preferably at least one half and thus to a great extent the total surface of one side of a bank note is thus covered with specific textures. Regions of the surface of the bank note are thus covered with a respectively specific texture over a large area, in the order of magnitude of several square centimeters. These structures yield in sum a kind of large-area "texture bar code'' which can also be clearly associated with a denomination of a bank-note series by a partially sighted or blind person. It is essential here to produce at least two clearly distinguishable textures, such as for example a "rough/smooth" bar code, which define said association in their mutual placement. The different tactilities or surface conditions of such large-area structures can be detected especially well by partially sighted or blind persons. This is particularly preferably the case even when the height of the tactile structures relative to the substrate surface is not very pronounced, or at least lower than would be necessary for reliable tactile association of small-area tactile structures, for example with an area of a few square millimeters.
According to a preferred embodiment, a logical correlation of the structures on both sides of the substrate exists and can be clearly identified by a user.
This means
4 that a correlation or a logical relation exists between the palpable textures on the front side of the substrate and the back side of the substrate.
The specific textures can be applied by different printing methods, such as for example intaglio printing, screen printing or flexographic printing. By intaglio printing it is possible for example to areally create line grids which are delimited by regions not treated by intaglio printing (and thus smooth calendered areas).
Screen printing or flexographic printing can be used for producing perceptibly smooth surfaces, for example on the rough back sides of bank notes with one-sided intaglio printing. In particular when bank-note substrates are lacquered, transparent and thus optically unperceived lacquer layers are suitable for producing special textures.
A particular advantage of the invention is a higher recognizability of textures through better adaptation to the physiological capabilities of the human sense of touch in comparison to single elements embossed in relief. A further advantage of the invention is an improved stability of textures in bank notes in circulation, since the effect is not based on a relief height, but rather the areal texture of a surface. This is known to be subject to lower wear.
Furthetniore, the security element according to the invention is usable on all bank-note substrates, from cotton paper through hybrid to polymer, since in principle only the surface of the substrate is tactilely detectable and the core of the substrate plays a minor part. The substrate here preferably comprises paper and/or a foil, in particular a translucent or transparent foil (e.g. in the window region of a bank note).
In the simplest case, the substrate consists completely either of paper or of plastic.
However, the substrate can also consist of different materials in certain regions, consisting in particular of paper in one region and at the same time of plastic, preferably a translucent foil, in another region. This makes it possible to emboss different materials as a substrate in one working operation. A translucent foil is understood here to be either a transparent or a semi-transparent foil, for example a glazing foil, which contains for example polyamide, polyester, polyethylene or biaxially oriented polypropylene (BOPP).
According to a preferred embodiment, the area of a tactilely detectable structure corresponds at least to the area of a fingertip of thumb or forefinger. It has turned out that structures with an area of such size can be tactilely detected especially well by partially sighted or blind persons. The area of a tactilely detectable structure amounts for example to at least 2 cm2, preferably at least 3 cm2.
According to a further preferred embodiment, at least one tactilely detectable structure has a smooth surface condition, and at least one other tactilely detectable structure a rough surface condition. Such a great difference of texture is tactilely detectable especially well by partially sighted or blind persons.
A printing method for manufacturing tactile structures is for example the spray nozzle method "X-Dot" developed by the company "hss baumer". This printing method was developed specifically for producing brailles and is very similar to the ink-jet method. However, the transferred quantity of ink is greater by several powers of ten than in a classical ink-jet printer from the office sector. The transferred ink drop is not obtained via a piezoelectric element or a short-pulse thermal heating in the print head as in a classical ink-jet printer, but via a mechanical opening and closing of a seal. This method is able to produce tactile structures with a height of up to 300 gm.
Furthermore, screen printing is also known as a printing method according to the invention. In screen printing, the printing ink is printed on the substrate with a squeegee through a fine-meshed fabric. Non-printing places arc previously made impermeable in the screen by means of a coating through an exposure operation.
The printing-ink layer thickness applied to the substrate is determined substantially by the screen thickness. The greater the thickness of the screen, the greater the height of the transferred layer thickness.
Alternatively, a tactile element can be produced on a substrate by means of toner- or ink-jet-based methods through a multiple coating. Alternatively, the tactile element can first be formed on an intermediate carrier (e.g. photoconductor drum or rubber roll) before the transfer to the substrate is effected.
Preferably, the ink layer or lacquer layer according to the invention consists of a grid-like arrangement of individual elements, wherein these elements are respectively produced by a single drop or thread of ink and/or lacquer. This has the special advantage that the tactile elements can be produced with only a single printing operation. This results in a saving of time and cost or increase in efficiency.
Besides applying a single drop of ink or lacquer, it is also possible to apply a continuous or thread-shaped tactile element, for example in the form of a groove, with the valve open and the substrate moving. It is also possible to produce a so-called multidrop, by which a drop is overprinted with a protective lacquer, or to unite two different, colored drops into a tactile element.
According to a further embodiment, the additional security feature consists or a variation of size, height and/or form of the tactile structures. In particular, different tactile structures differ here in their size, height and/or form.
According to a further embodiment, the additional security feature consists of tactile structures that are printed in each other and/or over each other and/or beside each other, wherein the respective structures can differ in their properties.
The combination of visually similar but differently executed tactile single elements can enable a distinction by means of different checking methods (visual, haptic, machine-readable). Thus, two neighboring single elements can for example have the same geometry, same color and photochromic property, but differ in another property (e.g. magnetism or IR transparency).
According to a further embodiment, the additional security feature consists of a rnicroroughness of the surface. Here, the partially different frictional resistance between the tactile structures and the places of the substrate having no tactile structures is detected by a user with his fingertip. In this case, individual tactile structures differ in their microroughness. The microroughness can be influenced here via suitable fillers, the binder system of the ink or lacquer or/and the drying process.
According to a further embodiment, the additional security feature consists of a tack of the surface. The tack of the surface is in particular adjusted or changed by selecting suitable binders of the employed ink or lacquer and/or by adding antislip agents, such as for example waxes.
According to a further embodiment, the tactile structure forms tactilely detectable information in tactile script which describes the value, the currency, the country and/or the date of issue of a bank note, wherein this information can be read out by means of a sensor or a bank-note processing machine via the additional security feature. An embodiment as a machine-readable feature (e.g. magnetic, IRA ink) has the advantage that the presence of a tactile element can be tested by machine.
There is thus the possibility to detect by machine the loss of the tactile information during the circulation of a bank note.
According to a further embodiment, a further tactile element produced by means of embossing methods, lasering or intaglio printing is applied to or beside the security element. This further tactile element is applied to the substrate independently of the tactile element according to the invention, but can interact therewith optically, for example by the two together forming a pattern or a graphical image.
According to a further embodiment, the tactile structures differ from value document to value document. This can be effected for example batch-wise for the individual value (10s, 20s...), or by production series (old 50s versus new 50s) or from multi-up sheet to multi-up sheet (serial number). For differing from multi-up sheet to multi-up sheet, the screen printing process cannot be used since screen printing does not enable any individualization.
It will be appreciated that the features mentioned hereinabove and those to be explained hereinafter are usable not only in the stated combinations but also in other combinations without going beyond the scope of the present invention, provided this is covered by the scope of protection of the claims.
The advantages of the invention will be explained with reference to the following exemplary embodiments and the complementary figures. The embodiment examples represent preferred embodiments, without the invention being in any way limited thereto. Furthermore, the representations in the figures are strongly schematic for the sake of better comprehension and do not reflect the actual conditions.
In particular, the proportions shown in the figures do not correspond to the relations existing in reality and serve exclusively to improve the clearness.
Furthermore, the embodiments described in the following embodiment examples arc reduced to the essential core information for the sake of easier comprehension. In the practical implementation, substantially more complex patterns or images can be used.
Specifically, there are schematically shown:
Fig. 1 a value document according to the invention having tactile structures in plan view in a first embodiment, Fig. 2 a value document according to the invention having tactile structures in plan view in a first embodiment.
Fig. 1 shows in plan view a value document 1, for example a bank note, on whose surface altogether four tactile elements 2 and 3 are disposed. The two tactile elements 2 have a smooth surface, and the two tactile elements 3 a rough surface.
When a partially sighted or blind person brushes over the surface of the value document 1 from the left to the right with the forefinger and thumb of one hand, the person will first feel a rough surface, then a smooth surface, then a rough surface again, and finally a smooth surface. Since each tactile structure respectively has an area corresponding to one quarter of the total surface of the value document 1 and is thus shaped over a large area, the person can clearly detect the different tactilities. For example, this special arrangement of the tactile elements means that this value document is a 20-euro bank note.
Fig. 2 shows in plan view a value document 1, for example likewise a bank note, which, however, unlike the value document from Fig 1, has altogether eight tactile elements 2 and 3. As in Fig. 1, the four tactile elements 2 have a smooth surface, and the four tactile elements 3 a rough surface.
When a partially sighted or blind person brushes over the surface of the value document 1 from the left to the right with the forefinger and thumb of the left hand, the person will first feel a rough surface with the forefinger and a smooth surface with the thumb, then a smooth and a rough surface, then a rough and a smooth surface again, and finally a smooth and a rough surface, respectively. Since each tactile structure respectively has an area corresponding to one eighth of the total surface of the value document 1 and is thus likewise shaped over a large area, the person can clearly detect the different tactilities, which are additionally different for thumb and forefinger. For example, this special arrangement of the tactile elements means that this value document is a 10-euro bank note and thus a different bank note from the bank note from Fig. 1.
The specific textures can be applied by different printing methods, such as for example intaglio printing, screen printing or flexographic printing. By intaglio printing it is possible for example to areally create line grids which are delimited by regions not treated by intaglio printing (and thus smooth calendered areas).
Screen printing or flexographic printing can be used for producing perceptibly smooth surfaces, for example on the rough back sides of bank notes with one-sided intaglio printing. In particular when bank-note substrates are lacquered, transparent and thus optically unperceived lacquer layers are suitable for producing special textures.
A particular advantage of the invention is a higher recognizability of textures through better adaptation to the physiological capabilities of the human sense of touch in comparison to single elements embossed in relief. A further advantage of the invention is an improved stability of textures in bank notes in circulation, since the effect is not based on a relief height, but rather the areal texture of a surface. This is known to be subject to lower wear.
Furthetniore, the security element according to the invention is usable on all bank-note substrates, from cotton paper through hybrid to polymer, since in principle only the surface of the substrate is tactilely detectable and the core of the substrate plays a minor part. The substrate here preferably comprises paper and/or a foil, in particular a translucent or transparent foil (e.g. in the window region of a bank note).
In the simplest case, the substrate consists completely either of paper or of plastic.
However, the substrate can also consist of different materials in certain regions, consisting in particular of paper in one region and at the same time of plastic, preferably a translucent foil, in another region. This makes it possible to emboss different materials as a substrate in one working operation. A translucent foil is understood here to be either a transparent or a semi-transparent foil, for example a glazing foil, which contains for example polyamide, polyester, polyethylene or biaxially oriented polypropylene (BOPP).
According to a preferred embodiment, the area of a tactilely detectable structure corresponds at least to the area of a fingertip of thumb or forefinger. It has turned out that structures with an area of such size can be tactilely detected especially well by partially sighted or blind persons. The area of a tactilely detectable structure amounts for example to at least 2 cm2, preferably at least 3 cm2.
According to a further preferred embodiment, at least one tactilely detectable structure has a smooth surface condition, and at least one other tactilely detectable structure a rough surface condition. Such a great difference of texture is tactilely detectable especially well by partially sighted or blind persons.
A printing method for manufacturing tactile structures is for example the spray nozzle method "X-Dot" developed by the company "hss baumer". This printing method was developed specifically for producing brailles and is very similar to the ink-jet method. However, the transferred quantity of ink is greater by several powers of ten than in a classical ink-jet printer from the office sector. The transferred ink drop is not obtained via a piezoelectric element or a short-pulse thermal heating in the print head as in a classical ink-jet printer, but via a mechanical opening and closing of a seal. This method is able to produce tactile structures with a height of up to 300 gm.
Furthermore, screen printing is also known as a printing method according to the invention. In screen printing, the printing ink is printed on the substrate with a squeegee through a fine-meshed fabric. Non-printing places arc previously made impermeable in the screen by means of a coating through an exposure operation.
The printing-ink layer thickness applied to the substrate is determined substantially by the screen thickness. The greater the thickness of the screen, the greater the height of the transferred layer thickness.
Alternatively, a tactile element can be produced on a substrate by means of toner- or ink-jet-based methods through a multiple coating. Alternatively, the tactile element can first be formed on an intermediate carrier (e.g. photoconductor drum or rubber roll) before the transfer to the substrate is effected.
Preferably, the ink layer or lacquer layer according to the invention consists of a grid-like arrangement of individual elements, wherein these elements are respectively produced by a single drop or thread of ink and/or lacquer. This has the special advantage that the tactile elements can be produced with only a single printing operation. This results in a saving of time and cost or increase in efficiency.
Besides applying a single drop of ink or lacquer, it is also possible to apply a continuous or thread-shaped tactile element, for example in the form of a groove, with the valve open and the substrate moving. It is also possible to produce a so-called multidrop, by which a drop is overprinted with a protective lacquer, or to unite two different, colored drops into a tactile element.
According to a further embodiment, the additional security feature consists or a variation of size, height and/or form of the tactile structures. In particular, different tactile structures differ here in their size, height and/or form.
According to a further embodiment, the additional security feature consists of tactile structures that are printed in each other and/or over each other and/or beside each other, wherein the respective structures can differ in their properties.
The combination of visually similar but differently executed tactile single elements can enable a distinction by means of different checking methods (visual, haptic, machine-readable). Thus, two neighboring single elements can for example have the same geometry, same color and photochromic property, but differ in another property (e.g. magnetism or IR transparency).
According to a further embodiment, the additional security feature consists of a rnicroroughness of the surface. Here, the partially different frictional resistance between the tactile structures and the places of the substrate having no tactile structures is detected by a user with his fingertip. In this case, individual tactile structures differ in their microroughness. The microroughness can be influenced here via suitable fillers, the binder system of the ink or lacquer or/and the drying process.
According to a further embodiment, the additional security feature consists of a tack of the surface. The tack of the surface is in particular adjusted or changed by selecting suitable binders of the employed ink or lacquer and/or by adding antislip agents, such as for example waxes.
According to a further embodiment, the tactile structure forms tactilely detectable information in tactile script which describes the value, the currency, the country and/or the date of issue of a bank note, wherein this information can be read out by means of a sensor or a bank-note processing machine via the additional security feature. An embodiment as a machine-readable feature (e.g. magnetic, IRA ink) has the advantage that the presence of a tactile element can be tested by machine.
There is thus the possibility to detect by machine the loss of the tactile information during the circulation of a bank note.
According to a further embodiment, a further tactile element produced by means of embossing methods, lasering or intaglio printing is applied to or beside the security element. This further tactile element is applied to the substrate independently of the tactile element according to the invention, but can interact therewith optically, for example by the two together forming a pattern or a graphical image.
According to a further embodiment, the tactile structures differ from value document to value document. This can be effected for example batch-wise for the individual value (10s, 20s...), or by production series (old 50s versus new 50s) or from multi-up sheet to multi-up sheet (serial number). For differing from multi-up sheet to multi-up sheet, the screen printing process cannot be used since screen printing does not enable any individualization.
It will be appreciated that the features mentioned hereinabove and those to be explained hereinafter are usable not only in the stated combinations but also in other combinations without going beyond the scope of the present invention, provided this is covered by the scope of protection of the claims.
The advantages of the invention will be explained with reference to the following exemplary embodiments and the complementary figures. The embodiment examples represent preferred embodiments, without the invention being in any way limited thereto. Furthermore, the representations in the figures are strongly schematic for the sake of better comprehension and do not reflect the actual conditions.
In particular, the proportions shown in the figures do not correspond to the relations existing in reality and serve exclusively to improve the clearness.
Furthermore, the embodiments described in the following embodiment examples arc reduced to the essential core information for the sake of easier comprehension. In the practical implementation, substantially more complex patterns or images can be used.
Specifically, there are schematically shown:
Fig. 1 a value document according to the invention having tactile structures in plan view in a first embodiment, Fig. 2 a value document according to the invention having tactile structures in plan view in a first embodiment.
Fig. 1 shows in plan view a value document 1, for example a bank note, on whose surface altogether four tactile elements 2 and 3 are disposed. The two tactile elements 2 have a smooth surface, and the two tactile elements 3 a rough surface.
When a partially sighted or blind person brushes over the surface of the value document 1 from the left to the right with the forefinger and thumb of one hand, the person will first feel a rough surface, then a smooth surface, then a rough surface again, and finally a smooth surface. Since each tactile structure respectively has an area corresponding to one quarter of the total surface of the value document 1 and is thus shaped over a large area, the person can clearly detect the different tactilities. For example, this special arrangement of the tactile elements means that this value document is a 20-euro bank note.
Fig. 2 shows in plan view a value document 1, for example likewise a bank note, which, however, unlike the value document from Fig 1, has altogether eight tactile elements 2 and 3. As in Fig. 1, the four tactile elements 2 have a smooth surface, and the four tactile elements 3 a rough surface.
When a partially sighted or blind person brushes over the surface of the value document 1 from the left to the right with the forefinger and thumb of the left hand, the person will first feel a rough surface with the forefinger and a smooth surface with the thumb, then a smooth and a rough surface, then a rough and a smooth surface again, and finally a smooth and a rough surface, respectively. Since each tactile structure respectively has an area corresponding to one eighth of the total surface of the value document 1 and is thus likewise shaped over a large area, the person can clearly detect the different tactilities, which are additionally different for thumb and forefinger. For example, this special arrangement of the tactile elements means that this value document is a 10-euro bank note and thus a different bank note from the bank note from Fig. 1.
Claims (7)
1. A security feature for value documents, wherein the security feature has at least two tactilely detectable structures which are located on at least one side of a substrate of the value document, wherein each of the at least two tactilely detectable structures has a tactilely detectable surface condition, and wherein the surface condition of at least two tactilely detectable structures differs, wherein the sum of the areas of the at least two tactilely detectable structures amounts to at least 30% based on the total area of one side of the value document.
2. The security feature according to claim 1, wherein the sum of the areas of the at least two tactilely detectable structures amounts to at least 50%.
3. The security feature according to either claim 1 or 2, wherein the area of a tactilely detectable structure corresponds at least to the area of a fingertip of thumb or forefinger.
4. The security feature according to any one of claims 1 to 3, wherein the area of a tactilely detectable structure amounts to at least 2 cm2.
5. The security feature accordingly to any one of claims 1 to 3, wherein the area of tactilely detectable structure amounts to at least 3 cm2.
6. The security feature according to any one of claims 1 to 5, wherein at least one tactilely detectable structure has a smooth surface condition, and at least one other tactilely detectable structure a rough surface condition.
7. The security feature according to any one of claims 1 to 6, wherein the tactilely detectable structures on both sides of the substrate have a logical correlation that is clearly identifiable by a user.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102013019665.5A DE102013019665A1 (en) | 2013-11-22 | 2013-11-22 | Tactile detectable security feature for value documents |
| DE102013019665.5 | 2013-11-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2866532A1 CA2866532A1 (en) | 2015-05-22 |
| CA2866532C true CA2866532C (en) | 2021-11-16 |
Family
ID=51932172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2866532A Active CA2866532C (en) | 2013-11-22 | 2014-10-08 | Tactilely detectable security feature for value documents |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2878455B1 (en) |
| CA (1) | CA2866532C (en) |
| DE (1) | DE102013019665A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102023100676B3 (en) | 2023-01-12 | 2024-03-07 | Melzer Maschinenbau Gmbh | Security element for a security document |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH662989A5 (en) | 1983-11-16 | 1987-11-13 | De La Rue Giori Sa | VALUE PAPER. |
| DE10124630A1 (en) | 2001-05-18 | 2002-11-21 | Giesecke & Devrient Gmbh | Security, especially banknote, with printed symbols and security element, is coated with mat protective varnish except over security element |
| EP1439076A1 (en) * | 2003-01-15 | 2004-07-21 | Kba-Giori S.A. | Security element for documents |
| DE10305288B4 (en) | 2003-02-10 | 2005-06-30 | Leonhard Kurz Gmbh & Co. Kg | Security document with at least one security element |
| GB2400074B (en) * | 2003-04-03 | 2005-05-25 | Rue Internat Ltd De La | Improvements in sheets |
| DE102006016342A1 (en) * | 2006-04-05 | 2007-10-11 | Giesecke & Devrient Gmbh | security element |
| DE102006039306A1 (en) * | 2006-08-22 | 2008-02-28 | Giesecke & Devrient Gmbh | Security paper sheet with intaglio print |
| DE102009007778A1 (en) | 2009-02-04 | 2010-08-05 | Bundesdruckerei Gmbh | Plastic-based value or security document |
| DE102009053498A1 (en) | 2009-11-16 | 2011-05-19 | Giesecke & Devrient Gmbh | laminate body |
| DE102011108239A1 (en) * | 2011-07-21 | 2013-01-24 | Giesecke & Devrient Gmbh | Data carrier with tactile security feature |
| DE102011119730A1 (en) | 2011-11-30 | 2013-06-06 | Giesecke & Devrient Gmbh | Data carrier with tactile security feature |
| FR2987783B1 (en) | 2012-03-06 | 2014-04-11 | Oberthur Fiduciaire Sas | SECURITY DOCUMENT PROVIDED WITH A TOUCH MARK AND TEXTURED AREA AND METHOD OF MANUFACTURE |
| GB201208137D0 (en) | 2012-05-10 | 2012-06-20 | Rue De Int Ltd | Security devices and methods of manufacture therefor |
-
2013
- 2013-11-22 DE DE102013019665.5A patent/DE102013019665A1/en not_active Withdrawn
-
2014
- 2014-10-08 CA CA2866532A patent/CA2866532C/en active Active
- 2014-11-18 EP EP14003881.1A patent/EP2878455B1/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| EP2878455B1 (en) | 2020-09-30 |
| CA2866532A1 (en) | 2015-05-22 |
| EP2878455A1 (en) | 2015-06-03 |
| DE102013019665A1 (en) | 2015-05-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR20100033486A (en) | Film element for detecting authenticity | |
| CA2841862C (en) | Data carrier having tactile security feature | |
| RU2569268C2 (en) | Valuable document with corresponding matte and glossy protective layers | |
| RU2530419C2 (en) | Method of manufacturing protective element for secured document | |
| KR20060123266A (en) | Security document, method for producing a security document and the use of a security element | |
| CN105793058A (en) | Optically variable security threads and stripes | |
| DK2643162T3 (en) | Value document and / or security document as well as method for making the same | |
| WO2007115656A2 (en) | Security element comprising authenticity features that can be identified in a visual and tactile manner | |
| US10322601B2 (en) | Security element with effect pigments and an embossing structure and method for the production thereof | |
| EP2857218B1 (en) | Method for the production of a security mark with tactile structures for valuable documents | |
| EP3209502A1 (en) | Improvements in security papers and documents | |
| US8877328B2 (en) | Value document with printed areas partly covered with foil | |
| CA2866532C (en) | Tactilely detectable security feature for value documents | |
| KR101080917B1 (en) | Method for printing a security element and security element | |
| RU2417899C2 (en) | Element of protection with pattern made by gravure printing method | |
| JP6343878B2 (en) | Authentic media | |
| JP2007094132A (en) | Precious printed matter with flocky finish layer | |
| EP1583667A2 (en) | Security element for documents | |
| JP2005262891A (en) | Card using permeable raw material | |
| CA3068508C (en) | Data carrier with tactile printed area for ink writing data | |
| NZ761097B2 (en) | Data carrier with tactile printed area for ink writing data | |
| KR20200072699A (en) | Printed matter using near infrared ink and manufacturing method thereof | |
| JP2018164978A (en) | Forgery prevention medium | |
| KR20100130516A (en) | A printing paper of blind and weak eyesight |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request |
Effective date: 20190828 |