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
  • B42D25/355—Security threads
• • 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
  • B42D25/40—Manufacture
  • B42D25/45—Associating two or more layers
  • B42D25/465—Associating two or more layers using chemicals or adhesives
  • B42D25/47—Associating two or more layers using chemicals or adhesives using adhesives
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S428/00—Stock material or miscellaneous articles
  • Y10S428/916—Fraud or tamper detecting
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
  • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
  • Y10T428/24802—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]
  • Y10T428/24917—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including metal layer

Definitions

• the invention relates to a multi-layer security element, a layer composite for the further production of such a security element, a user method for the production of the layer composite and the security element and an object equipped with the security element, in particular a value document such as bank notes and the like.
• Security elements in the sense of the invention are, for example, security threads and strips for banknotes and for other value documents, tear threads for packaging, labels and tags, which are suitable for recognizing the authenticity of an object connected to them, in particular a value document.
• Documents of value in the sense of the invention can be banknotes, ID cards, checks, passports, tickets, entrance tickets and the like.
• the invention is also suitable for securing any other valuables and their packaging, such as Books, CDs and the like.
• Multi-layer security elements are widely used in the form of security threads in banknotes. They comprise at least one carrier substrate, which is generally in the form of a transparent plastic film, on which further layers are applied. These further layers are predominantly printed on and, in particular in the case of metallic layers, also vapor-deposited, but can also be sputtered or sprayed, for example.
• the layers can be arranged side by side and / or one above the other. They can form signs or patterns or have cutouts from the outset or through subsequent partial material removal, in order to form a negative step, for example, which is hardly visible when viewed in reflected light, When viewed in transmitted light, however, the transparency of the carrier substrate creates a clearly visible contrast.
• the layers can also have optically variable effects and, for this purpose, in particular have diffraction structures in the form of grating patterns or height frames, etc.
• the layers can also have machine-readable security features, such as, for example, electrical conductivity in the case of continuous metallic coatings or in the case of printing layers doped with electrically conductive particles.
• magnescent properties may be present, in particular luminescent substances are frequently used in the non-visible area.
• the machine-readable security features can also be configured locally as a masc-readable code, for example as a bar code.
• a side-independent appearance can easily be achieved by, for example, first printing a carrier substrate with the magnetic layer and then completely metallizing it on both sides.
• first metallize a film to apply the magnetic layer to the metal layer, and then to coat the film to cut, lay on top of each other and glue in a roll lamination system in such a way that a thread-like film composite with two outer films, two inner metal layers and a central double magnetic layer between the metal layers is created (EP 0374763 A2).
• the two outer foils protect the coatings from external influences.
• the absolutely symmetrical layer structure of the film composite prevents the thread produced from curling, which leads to the formation of garlands.
• WO 92/11142 describes several variants of a security thread with a hidden magnetic layer or a hidden magnetic code and integrated negative writing.
• the negative writing is generated identically in the magnetic layer and in two metal layers covering the magnetic layer.
• an activatable printing ink is first applied in the area of the later negative writing in a customary manner on a transparent plastic film. Then a first metal layer is evaporated and a magnetic layer is printed over the entire surface, which is finally covered with a second evaporated metal layer.
• a second evaporated metal layer By subsequently activating the Printing ink creates congruent cutouts in the three layers above the printing ink.
• the inner metal coating ensures that the security thread has the same external appearance regardless of the side due to the transparency of the carrier film.
• At least one security feature is generated on a first carrier film, and at least one security feature is likewise generated on a second carrier film that differs from it.
• the two foils are now laminated into a layered composite.
• the carrier films each have register marks in the longitudinal and / or transverse direction of the film, by means of which the register-accurate connection of the two films is controlled.
• a first of the two carrier foils is held under a predetermined, preferably constant tensile stress, and the second carrier foil is controlled in the longitudinal direction of the foil with the aid of its register marks in register-correct manner with the register marks of the first foil.
• Security elements can then be separated from the layered composite in the desired shape, for example as labels, or the layered composite can be divided into threads or strips and wound up on so-called endless rolls.
• the carrier films can be plastic substrates, for example made of PET; However, a plastic / paper composite is also conceivable, in which at least one carrier film consists of paper, for example cotton paper.
• the security features can be any machine-readable features, such as electrically conductive, magnetic, luminescent security features, in particular luminescent security features in the non-visible spectral range. However, any other security features, such as negative writing or an imprint, are also possible.
• the advantage achieved with the invention can be seen in the fact that the generation of the respective security features, regardless of their shape and arrangement, can be produced in the final layer structure under the optimal process conditions for the security feature. Their manufacture is at no time dependent on the shape, location or production method of other security features of the same layer composite. As far as possible, different security features can of course also be created on a common carrier film. On the other hand, it is also not excluded that the layer composite comprises more than two foils if, for example, the production of three different security features cannot otherwise be easily combined.
• This can be, for example, a security element that has two differently colored metals that are arranged in a specific pattern. Each of the metals is evaporated onto a carrier film and structured accordingly by etching or washing processes. The carrier film is then laminated using the method according to the invention. In this case, the metal layers preferably come to lie on the inside, so that they are protected by the carrier foils.
• the invention can also be used very advantageously in the production of security elements which have internal security features which are accessible only for machine testing and which due to their intrinsic color or other properties disturb the visual appearance of the security element and must therefore be covered by additional layers.
• the coverage can be held in register and only in the required areas.
• the invention is also advantageously suitable for the production of security elements which are composed of two carrier foils and have security features which have to be arranged congruently. This is the case, for example, in the case of a security element which has a different diffraction structure on both sides, the reflection layers, in particular metal layers, of which have a congruent negative writing.
• the control of the second carrier film in the longitudinal direction of the film relative to the first carrier film under tension is preferably carried out by stretching the second carrier film in the longitudinal direction of the film.
• two preferred embodiments of the invention provide that either the second carrier film to be controlled by stretching is shorter than the first carrier film under tension or that the two carrier films basically have the same length as the first one under constant tension Carrier film is constantly stretched at least slightly.
• the last-mentioned variant has the advantage that both carrier foils are normally loaded and stretched with approximately the same tensile stress, the tensile stress on the strain-controlled second carrier foil being reduced or increased depending on the direction of deviation of the registration.
• either the first or the second carrier film can be controlled by stretching, depending on which film leads the other.
• the stretching of the carrier foils is preferably achieved by controlled braking of the roll from which the carrier foil is pulled off and with the stripping speed remaining the same.
• the resulting increased tensile stress in the carrier film leads to a controlled expansion of the carrier film material.
• a pull group is provided, which is preferably also controlled using the register marks in the two carrier films.
• the register marks are preferably read without contact by means of light guides or CCD cameras, either in incident light or in transmitted light.
• the security features themselves can also serve as register marks.
• Figures 2-8 different embodiments of a two-layer composite.
• Figure 1 shows a double-belt laminating device.
• a first carrier film 1 and a second carrier film 2 are drawn off from supply rolls 3, 4, laminated to one another in a double belt press 5 and then wound up as a film composite 6 on a further supply roll 7 for intermediate storage before further processing.
• a radiation-curing, transparent adhesive is applied to the first carrier film 1 in an adhesive station 8 and, after the two carrier films 1, 2 have been brought together in the double belt press 5, is radiation-hardened by means of the radiation source 9.
• a radiation-curing adhesive other adhesives can also be used, for example heat-curing adhesives, for which purpose the double belt press 5 is preferably heated.
• the removal speed of the carrier films 1 and 2 from the supply rolls 3 and 4 is first determined by the transport speed of the double belt press 5.
• the supply roll 3 of the first carrier film 1 is controlled, i.e. braked or driven so that it is under a defined tension. This tension should be constant throughout the process. Due to the enormous weight of such supply rolls at the beginning of the unwinding process and the weight that is constantly decreasing during the unwinding process, it can happen that the supply roll 3 is first driven and possibly braked in the further course of the unwinding process.
• the second carrier film 2 is similarly under tensile stress.
• each carrier film 1, 2 is equipped with register marks which are detected by means of register mark detectors 10. Is by evaluating the recorded Register mark positions determined that the register marks of the first carrier film 1 relative to the register marks of the second carrier film 2 are no longer within a still acceptable tolerance range, so one of the two carrier films 1, 2 is stretched according to the invention. There are three options for this:
• Both carrier films 1, 2 are normally under the same tensile stress under which the carrier films do not stretch.
• this other of the two carrier foils is stretched slightly until the security features of the two carrier foils again within a predetermined tolerance range are positioned to each other.
• the stretching is preferably carried out by controlled braking of the supply roll from which the carrier film to be stretched is pulled off.
• the second carrier film 2 can be made shorter than the first carrier film 1, so that the second film 2 must always be stretched relative to the first carrier film 1 in order to be accurate to the register
• the first carrier film 1 can be pulled off under such a tensile stress that it basically stretches by a predetermined percentage.
• the second carrier film 2 is then pulled off the supply roll 4 with the same stretch. Is now again based on the tectors 10 detected a deviation from the register position, the supply roll 4 is more or less braked depending on the direction of deviation in order to increase or reduce the elongation of the second carrier film 2 accordingly.
• the carrier films 1, 2 can have the width of the security element to be produced therefrom later, for example the width of a security thread or strip for banknotes. However, they preferably have a multiple of the width and the security elements to be produced therefrom are then divided out of the laminated film composite, for example by cutting the film composite into threads or strips or by separating individual security elements from the film composite, for example by punching out in the form of a label become.
• Light guides or CCD cameras are particularly suitable for contactless detection of the register marks in reflected light or transmitted light.
• the first carrier film 1 is held under a constant tensile stress and the register stability is achieved by stretching the second carrier film 2. Since the width of the second carrier film 2 increases or decreases depending on the degree of its longitudinal expansion, a tensile group 11 is provided in order to equalize the deviations of the second film 2 in the transverse direction of the film. Such a This tensile group is not necessary when processing foils in thread or strip widths, since the width fluctuation is minimal.
• more than two carrier films can also be laminated to one another by supplementing the double-belt press device shown in FIG. 1 by equivalent devices, in particular by one or more additional supply rolls.
• FIG. 1 already shows a concrete example for the production of a layer composite 6 comprising two carrier films, in which the security features are arranged uniformly to one another.
• a security thread in endless form is produced here.
• the section A of the first film 1 comprises a carrier film 100 made of transparent plastic with a vapor-deposited, partial metal layer 101 and with a bar code 102 made of magnetic material.
• the metal layer 101 leaves a central strip 103 of the carrier foil 100 freely, through which the carrier foil 100 appears transparent.
• the magnetic bar codes 102 consist of a printing ink containing magnetic particles and are printed on the metal layer 101 with a precise fit such that they are covered on one side by the metal layer 101.
• the cutout B of the second carrier film 2 also has a carrier film 200 made of transparent plastic and again a vapor-deposited metal layer 201.
• the metal layer 201 has cutouts in the form of a negative writing 202 which are produced in the usual way.
• the width of the second carrier film 2 corresponds to the width of the first carrier film 1.
• the negative writing 202 is placed in the metal layer 201 at the same point at which the carrier film 100 of the first film 1 has the transparent area 103.
• the second carrier film 2 is itself transparent in the area of the negative writing 202. As a result, the security thread remains transparent even after the lamination of the carrier films 1, 2 in the region of the negative font 202.
• Section C in FIG. 2 shows the laminated layer composite in a top view and in two cross sections. It can be seen that the magnetic bar code 102 is hidden between the two metal layers 101 and 201 (section C 2 - C 2 ), whereas the negative writing 202 is visible from both sides of the layer composite due to the transparent area 103 (section C 2 - C 2 ), whereas the negative writing 202 is visible from both sides of the layer composite due to the transparent area 103 (section
• the exemplary embodiment of a layer composite 6 shown in FIG. 1 thus includes security features which are arranged in register with one another both in the longitudinal direction of the layer composite and in the transverse direction of the layer composite. This is because the magnetic bar code 102 of the first carrier film 1 lies exactly between the negative fonts 202 of the second carrier film 2 and the negative fonts 202 of the film in the longitudinal direction second carrier film 2 are always exactly above the transparent region 103 of the first carrier film 1 in the film transverse direction.
• FIGS. 2a and 2b show a simple exemplary embodiment in which the focus is on the registration of the security features in the transverse direction of the film.
• the embodiment according to FIG. 2 differs from the variant shown in FIG. 1 only in that instead of the magnetic bar code 102 formed on the first carrier film 100, a magnetic strip 204 extending over the entire length of the layer composite 6 onto the metal layer 201 of the second carrier film 200 parallel to Negative script 202 is printed.
• FIG. 2b again shows a cross section corresponding to the cross sections Ci - and C2 - C2 of FIG. 1, but at a point in time before the lamination of the two carrier films.
• the two carrier foils 100, 200 are laminated, they are controlled in such a way that the magnetic strips 204 are hidden between the metal layers 101, 201 of the carrier foils 100, 200, whereas the negative writing 202 can be seen from both sides of the layer composite due to the transparent area 103.
• FIG. 3 shows a further embodiment in which it is important that the register is held in the transverse direction as well as in the longitudinal direction. Only a cross-sectional view is shown here.
• the second carrier film 2 is constructed identically to the second carrier film 2 according to FIG. 2 and accordingly comprises a transparent carrier film 200 with a metal layer 201 including negative writing 202 and two magnetic strips 204 printed on the metal layer 201 parallel to the negative writing.
• the carrier film 100 also has a full-surface metal layer 101, in turn in which a negative writing 104 is introduced.
• the negative writing 104 of the first carrier film 100 is identical, but is a mirror image of the negative writing 202 of the second carrier film 200, so that the two negative writings 202, 104 come to lie congruently one above the other when the films 1, 2 are laminated.
• the magnetic strips 204 are hidden between the metal layers 101, 201 in the final film composite, on the other hand the negative writing 104, 202 is visible and legible from both sides of the film composite.
• the metal layer 101 is provided over the entire surface with an at least semi-transparent, preferably completely transparent coating which contains fluorescent particles.
• This coating 105 could also be applied over the metal layer 201 of the other carrier film 200. Due to the semitransparency of the coating 105, the negative writing 104, 202 remains visible to both viewing sides of the film composite when viewed in transmitted light. The fluorescent particles form a further authenticity feature of the security element to be produced from the film composite.
• the semi-transparent coating can also be designed differently, for example as an optically variable thin-layer structure or other optically variable layers.
• FIG. 4 shows a further exemplary embodiment, in this case with an integrated optical diffraction structure.
• the first carrier film 1 again corresponds to the carrier film 1 from FIG. 2, which comprises a first transparent carrier film 100 with a vapor-deposited metal layer 101 in the form of two strips running parallel to the outer edges of the film and a central, transparent region 103 lying in between.
• the second carrier film 200 has a diffraction structure 206 with a metal coating 201 embossed into the carrier film 200.
• the metal coating 201 is in turn printed with a magnetic layer 204 in the form of two strips running parallel to the edge of the film. In the final layer composite, the magnetic strips 204 are through the metal layers 101 and 201 are covered.
• the diffraction structures can be perceived as an optically variable authenticity feature from both sides of the layer composite. If a diffraction structure pattern that is symmetrical in the longitudinal direction of the carrier film is chosen, the appearance of the layer composite is identical from both viewing sides. However, if the diffraction structure shows a special image, every second repetition of this image would have to be reversed in order to produce a layer composite that is independent of the viewing side.
• the diffraction structures 206 do not necessarily have to be stamped into the carrier film 200. It is also possible to apply a transfer element having the diffraction structures to the carrier film 200 in precise register. Instead, other optically variable security features can also be provided in this embodiment variant, such as thin-layer structures and the like.
• FIG. 5 shows a further exemplary embodiment, in which both carrier foils 1, 2 each have diffraction structures and a negative writing which are congruently one above the other in the final layer composite.
• Different diffraction structures 106, 206 are stamped into the carrier foils 100, 200.
• the diffraction structures 106, 206 are in turn covered with metal layers 101, 201, which in this case, however, are not present over the entire surface, but each have cutouts 104, 202.
• the cutouts 104 of the metal layer 101 of the first carrier film 100 are identical, although mirror-inverted to the cutouts 202 in the metal layer 201 of the second carrier film 200, so that they lie congruently one above the other in the finished film composite and can be perceived at least in transmitted light from both viewing sides of the film composite ,
• the metallized diffraction structures of the two carrier films are each through transparent lacquer layers 107, 207 protected. This facilitates the intermediate storage and subsequent lamination of the two carrier films 1, 2.
• the cutouts 104, 202 can form any pattern and alphanumeric characters, as in the preceding examples.
• the security element according to FIG. 5 is particularly suitable for use as a label over a hole in a banknote or another security document.
• the different diffraction structures 106 and 206 can be, for example, the front view and rear view of a head, building or other object, so that this object appears from the front or from the rear, depending on the viewing side of the document.
• FIG. 6 shows a further exemplary embodiment, in which it is again a matter of register-accurate lamination in the longitudinal and transverse directions of the film material.
• the first carrier film 100 is provided with a metal layer 101 over the entire surface in circular sections.
• a circular but magnetic layer 108 is also printed in register on these metal layer circles.
• the second carrier film 200 only has corresponding circular metal layers 201.
• the magnetic layer circles 108 between the two metal layers 101, 201 are hidden in the final film composite by laminating in a register-accurate manner.
• FIG. 7 shows an exemplary embodiment in which it is essentially a matter of register-accurate lamination in the longitudinal direction of the film.
• the first carrier film 100 carries a full-surface metal layer 101 with bars 109 made of magnetic material printed at a defined distance.
• the second carrier film 200 has metal layers 201 at a corresponding distance.
• the carrier film 2 remains in the regions 203 lying in between transparent. By register-laminating the two carrier foils 1, 2 in the longitudinal direction of the foil, the magnetic bars 109 are hidden between the metal layers 101 and 201.
• Figure 8 shows a further embodiment.
• the first carrier film 100 is partially coated with a first coating 110, which has a first color and is, for example, bonded by a colored metal.
• the carrier film 100 remains uncoated in the areas 103 lying between the color layers 110 and therefore transparent.
• the second carrier film 200 is in turn coated in some areas with a color layer 210 which differs in color from the color layer 110 of the first carrier film 100.
• the areas 203 of the carrier film 200 lying in between remain transparent again.
• the size and relative position of the transparent areas 103, 203 correspond to the color layer areas 110 and 210 of the respective other carrier film.
• the color layers 110, 210 in the exemplary embodiment according to FIG. 8 each have cutouts 104 and 202, which complement each other in the final film composite to form a negative writing “PL”.
• the negative writing is provided alternately in the correct reading and mirror-inverted manner, so that it can be read independently of the viewing side.

Landscapes

• Credit Cards Or The Like (AREA)
• Laminated Bodies (AREA)
• Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
• Polyoxymethylene Polymers And Polymers With Carbon-To-Carbon Bonds (AREA)
• Casings For Electric Apparatus (AREA)
• Materials For Medical Uses (AREA)
• Lining Or Joining Of Plastics Or The Like (AREA)

Applications Claiming Priority (3)

Publications (2)

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Family Cites Families (18)

• 2002
  • 2002-06-12 DE DE10226177A patent/DE10226177A1/de not_active Withdrawn
• 2003
  • 2003-06-06 WO PCT/EP2003/005981 patent/WO2003106185A2/fr not_active Application Discontinuation
  • 2003-06-06 AU AU2003242644A patent/AU2003242644A1/en not_active Abandoned
  • 2003-06-06 RU RU2005100759/11A patent/RU2331523C2/ru not_active IP Right Cessation
  • 2003-06-06 US US10/517,492 patent/US7744797B2/en not_active Expired - Fee Related
  • 2003-06-06 DE DE50311372T patent/DE50311372D1/de not_active Expired - Lifetime
  • 2003-06-06 EP EP03759917A patent/EP1515857B1/fr not_active Expired - Lifetime
  • 2003-06-06 AT AT03759917T patent/ATE427222T1/de active

Non-Patent Citations (1)

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