WO2005123415A1 - Process and apparatus for providing markings on security papers - Google Patents

Process and apparatus for providing markings on security papers Download PDF

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Publication number
WO2005123415A1
WO2005123415A1 PCT/CH2005/000334 CH2005000334W WO2005123415A1 WO 2005123415 A1 WO2005123415 A1 WO 2005123415A1 CH 2005000334 W CH2005000334 W CH 2005000334W WO 2005123415 A1 WO2005123415 A1 WO 2005123415A1
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WO
WIPO (PCT)
Prior art keywords
marking
substrate
identity
station
identity marking
Prior art date
Application number
PCT/CH2005/000334
Other languages
French (fr)
Other versions
WO2005123415A8 (en
Inventor
Stéphane Bolognini
Original Assignee
Kba-Giori S.A.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=34932152&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2005123415(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Kba-Giori S.A. filed Critical Kba-Giori S.A.
Priority to JP2007515759A priority Critical patent/JP2008502501A/en
Priority to US10/566,744 priority patent/US7434727B2/en
Priority to CA2567770A priority patent/CA2567770C/en
Priority to DE602005000255T priority patent/DE602005000255T2/en
Priority to EP05746962A priority patent/EP1641627B1/en
Priority to AU2005254136A priority patent/AU2005254136B2/en
Publication of WO2005123415A1 publication Critical patent/WO2005123415A1/en
Publication of WO2005123415A8 publication Critical patent/WO2005123415A8/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; 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
    • B42D25/00Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40Manufacture
    • B42D25/405Marking
    • B42D25/43Marking by removal of material
    • B42D25/435Marking by removal of material using electromagnetic radiation, e.g. laser
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F11/00Rotary presses or machines having forme cylinders carrying a plurality of printing surfaces, or for performing letterpress, lithographic, or intaglio processes selectively or in combination
    • B41F11/02Rotary presses or machines having forme cylinders carrying a plurality of printing surfaces, or for performing letterpress, lithographic, or intaglio processes selectively or in combination for securities
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/435Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material
    • B41J2/44Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using single radiation source per colour, e.g. lighting beams or shutter arrangements
    • B41J2/442Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective application of radiation to a printing material or impression-transfer material using single radiation source per colour, e.g. lighting beams or shutter arrangements using lasers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J3/00Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed
    • B41J3/54Typewriters or selective printing or marking mechanisms characterised by the purpose for which they are constructed with two or more sets of type or printing elements
    • B41J3/546Combination of different types, e.g. using a thermal transfer head and an inkjet print head
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; 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
    • B42D25/00Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; 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
    • B42D25/00Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/23Identity cards
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; 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
    • B42D25/00Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29Securities; Bank notes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B42BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42DBOOKS; 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
    • B42D25/00Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40Manufacture
    • B42D25/405Marking
    • B42D25/41Marking using electromagnetic radiation

Definitions

  • the present invention belongs to the field of the processes and apparatus intended to provide security documents with variable data, each security document receiving an individualized identity marking offering improved security against copies or falsification.
  • security document designates here primarily banknotes, but also designates documents of any kind having financial value, like cheques, lottery tickets, title deeds, as well as credit cards or identity papers. This list is not limitative.
  • the substrate of security documents is traditionally paper, but can also be made of polymeric foils and plates. The structure of such substrates may be homogenous or layered.
  • identity marking designates here any sign, readable either by the human eye or by a specific machine, whose characteristics may be varied such that each security paper may thereby be distinguished from any other security paper of the same type. Identity markings include, as examples, but are not limited to, serial numbers, bar codes, geometrical sequences, punchings, magnetically encoded zones, and the like.
  • the present invention concerns more specifically a process for providing at least one composite identity marking on a substrate of a security document, wherein said composite identity marking comprises a first identity marking and at least one second identity marking, wherein said first identity marking is provided by a first marking station, and wherein said second identity marking is provided by a second marking station, wherein a first side of said substrate is brought into marking relationship with said first marking station.
  • the identity marking of a security paper comprises a serial number printed on the document .
  • EP 0768189 teaches to associate an additional alphanumerical security feature to the serial number, borne by a foil or label, which is attached to the security paper by means of a process as mentioned above.
  • the information of the foil or label is read, after the fixing step of the foil onto the security paper, by a reading device.
  • the reading device commands a printer, which prints the same information at another place of the security paper, for example in association with the serial number.
  • the substrate is covered double-sided with an ink absorbing the same radiation, and submitted to said radiation along a marking path, whereby ink on both sides is ablated along said path.
  • the mark appears as a transparent window.
  • EP 0737572 and WO 03/099579 disclose marking systems comprising typographic, inkjet or laser printers positioned radially relative to a sheet fed drum for printing serial numbers, bar codes and additional security features. All said features are printed on the same side of the security document facing the printers.
  • the aim of the present invention is to create a process and an apparatus, producing a double-sided composite identity marking on a security document in the course of a same sheet handling step.
  • said second marking station includes a laser marking station for producing a laser beam, wherein a portion of the second side of said substrate is provided with a layer of material capable of absorbing a substantial amount of radiation emitted by the laser beam, wherein the laser beam is directed onto said layer of absorbing material through said first side and across said substrate to form said second identity marking only on said second side of the substrate.
  • a suitable apparatus for implementing this process comprises a first marking station and at least a second marking station, wherein said apparatus has means for bringing a first side of said substrate into marking relationship with said first marking station and in front of said second marking station, wherein said second marking station is a laser marking station for producing a laser beam and wherein the laser radiation of said laser beam is selected among the radiations capable to pass through the substrate without substantial modification thereof, and capable to react with a predetermined portion of material which absorbs a substantial amount of radiation emitted by the laser beam and which is arranged on the second side of said substrate, said second marking station being arranged in such a manner that said laser beam is directed onto said absorbing material through said first side and across said substrate to form said second identity marking only on said second side of the substrate.
  • the laser is an IR laser with a wavelength of between 0.8 ⁇ m and 10.6 ⁇ m when the substrate of said security documents is a paper sheet.
  • the laser beam has a wavelength of between 0.3 ⁇ m and 10.6 ⁇ m when the substrate of said security documents is a sheet of polymeric material .
  • the layer of radiation absorbing material may be any IR absorbent material printed or applied on the substrate.
  • the irradiation shall cause a sufficient temperature elevation to locally evaporate, ablate or burn said layer, or cause locally a photochemical reaction of a photosensitive material, inducing a color change or any other aspect change .
  • the Optically Variable Devices (OVD) applied on the notes are generally composed of at least a metallic layer that reacts very easily to the laser beam.
  • the material may also be an IR absorbent ink like an offset, intaglio, silkscreen or flexographic ink.
  • the OVI inks composed of metallic particles, react very well to the laser beam.
  • the process may provide a third identity marking, or even more, controlled by the same processing unit in the same way as the second marking.
  • the first and second identity markings are generated within one handling step in the same marking machine .
  • the first, and eventually further marking stations may use different marking techniques.
  • the first identity marking may be achieved by means of a mechanical typography process.
  • the alphanumerical characters may be realized by a set of electromechanical numbering boxes known in the art, wherein the characters selected for each print are controlled by the processing unit.
  • Other techniques like inkjet processes or embossing processes may be used.
  • the second identity marking may comprise the same alphanumerical signs as the first identity marking at various locations of the security paper, determined by the affixed foils or labels and/or portions of the second side of the sheet printed with light absorbing ink. Thereby the security document may receive a double-sided serial number.
  • the second marking may also materialize data calculated from the first identity marking by means of a mathematical or otherwise logical rule.
  • the data which shall be materialized into a second identity marking may be a randomly generated data, each one of said data being recorded in an authenticating data base in association with a corresponding first identity marking.
  • additional identity markings should not exhibit the same visible signs as the first and/or second identity marking.
  • Such an additional identity marking may be performed for example with non-visible ink.
  • the apparatus comprises a processing unit, wherein said processing unit issues sequentially ordered controlled signals to said first and second marking stations, such that each of said stations achieves, on each side of said substrate, sequentially determined markings able to form with corresponding markings achieved on the other side of the substrate a composite identity marking, wherein said second identity marking and said first identity marking of each composite identity marking correspond together by virtue of said linking rule
  • each marking station comprises a plurality of component marking devices, the operating zone of each marking device corresponding to one column, and the control signals emitted by the processing unit are distributed to the different component marking devices, the signals received by each component marking device being sequentially elaborated by means of the authenticating data base in function of the location of the component marking device.
  • the present invention it is not necessary to read the first identity marking imprinted on a security paper for determining the second and following identity markings. Nevertheless, it is advisable that after achievement of the complete composite identity markings on a set of security papers, the latter is led to a checking device verifying the correct achievement of the whole composite identity markings.
  • This quality control may be understood as a first authenticating test.
  • the security papers may be bundled, the papers of a bundle bearing a continuous sequence of alphanumerical identity marking.
  • Fig. 1 a schematic and partial representation of an embodiment of a numbering machine for numbering banknotes
  • Fig. 2 a simplified and schematic representation of a sheet with banknotes in the state at the issue of the numbering machine of Fig. 1, and
  • FIG. 3 a schematic and partial representation of a further embodiment of a numbering machine for numbering banknotes .
  • Sheet 1 is divided into a plurality of distinct fields, arranged in rows and columns, each field being intended to form a note .
  • sheet 1 comprises three columns 11, 12, 13 and ten rows 1 to
  • a photosensitive material absorbing in the IR schematically represented by circles 60 on Fig. 2, was applied on all fields, on the rear side of sheet 1.
  • Suitable materials are IR absorbent labels like OVD or IR absorbent ink like OVI and some offset, intaglio, silkscreen or flexography inks .
  • the numbering machine shown in Fig. 1 comprises a pair of marking stations 5 and 6, disposed at the periphery of drum 3, spaced around the drum. Each station comprises three similar component marking devices 51, 52, 53 and 61, 62, 63 respectively, localized each in front of one of the columns
  • components of station 5 can work according to the technology of mechanical typography, or another technology, e.g. ink-jet technology or embossing technology
  • components of station 6 work according to laser marking technology. It is also possible to have the components of station 5 placed after the laser marking station 6. Indeed, the location of the laser marking 6, before or after the marking station 5 (or with respect to other marking stations) , has no particular importance within the scope of this invention.
  • the components of the station 5 with mechanical typography can be arranged as taught by US 5,660,106, for example. Mechanical numbering boxes could also be used.
  • Advantages of mechanical typography are magnetic and/or IR security as well as high resolution and slight embossing.
  • Ink-jet technology does not provide such a high resolution. However, this technology provides high flexibility in terms of fonts and change of jobs.
  • the laser marking station can be a YAG type laser advantageously with a laser source located outside the machine and the laser light transmitted by optical fiber to laser heads mounted on the machine.
  • the power has to be adjusted in order to allow an adequate reaction of the absorbing, and/or photosensitive/reactive material with the laser beam.
  • Sheet 1 is for instance made of cotton based paper or polymer material with a thickness of about 100 ⁇ m, other suitable materials being possible provided the material is substantially transparent to the radiation emitted by the laser. Accordingly, the laser beams of station 6 pass through this substrate without any visible damage to the substrate, whereas a photosensitive/reactive material applied on the opposite side of the substrate absorbs the laser energy.
  • the material is either transformed (like for OVD) , ablated (like for IR absorbent inks) or partially ablated in the case of an ink composed of two types of pigments, one transparent to the laser wavelength and the other one absorbent to the same wavelength. In this latter case, a colour change can be observed after marking.
  • a processing unit 8 sends control signals to all the components 51, 52, 53, 61 62, 63 of the different marking stations.
  • Components 51 and 61 act on the fields of col. 11, components 52 and 62 on the fields of col .12 and components 53 and 63 on the fields of col . 13.
  • the components of station 5 print a serial number on the front side of the notes at locations indicated by 50 on Fig. 2, and components of station 6 provide on the rear side, at locations of the note indicated by 60 a second partial identity marking, linked to the particular serial number of the note by a mathematical rule as mentioned above.
  • Fig. 2 shows the appearance of sheet 1 after having been handled by the numbering machine.
  • Each field 111 to 1310 is provided with a complete identity marking sequentially determining the note.
  • Partial markings 50 are serial number and partial markings 60 on the other side of sheet 1 are, for example, the same serial number, or machine readable image information or other figures linked or related to the serial number.
  • sheet 1 When leaving drum 3, sheet 1 is led to pass in front of a checking device 9, which verify that the identity markings have been correctly provided.
  • Fig. 3 shows an other embodiment of a marking apparatus comprising a higher number of partial marking devices. Sheets are fed to a drum 3' via a feeding roller 14, in the direction of arrow A. They pass first in front of an ink-jet marking station 5' ' ', then in front of a laser marking station 6 1 and then successively in printing relationship with two typographic printers 5' and 5' 1 . All the four partial markings are determined by a common processing unit (not shown) .
  • the first side of the sheet is checked for erroneous markings by a first checking device 9 ' , while the sheet is still on the drum 3 ' .
  • a second checking device controls the marking performed by the laser marking station 6' after passage of the sheet over an exit/transfer roller 14 ⁇ , the sheet leaving the apparatus in the direction of arrow B.
  • a numbering machine as shown by Fig. 3 could be provided with other combinations of marking stations, like an ink-jet station and a typographic station for marking the first side and two laser marking stations for providing two different markings on the second side, for example a marking on an affixed label and a marking on a portion printed with IR-light absorbing ink.
  • the components 51, 52, 53 of the marking station 5 and the components 61, 62, 63 of the marking station 6 could be located on successive drums, on the same machine.

Abstract

Processing unit 8 is programmed to send control signals to all the members 51, 52, 53, 61, 62, 63 of two or more marking stations functioning with different printing technologies. Station 5 for instance functions with a mechanical typography system and station 6 is a laser marking station, the laser beam of which interacts with a light absorbing material applied on the rear side of the sheet 1, without substantially interacting with the front side of sheet 1 and the substrate of sheet 1.

Description

Process and Apparatus for providing markings on security papers
The present invention belongs to the field of the processes and apparatus intended to provide security documents with variable data, each security document receiving an individualized identity marking offering improved security against copies or falsification. The term "security document" designates here primarily banknotes, but also designates documents of any kind having financial value, like cheques, lottery tickets, title deeds, as well as credit cards or identity papers. This list is not limitative. The substrate of security documents is traditionally paper, but can also be made of polymeric foils and plates. The structure of such substrates may be homogenous or layered. The term "identity marking" designates here any sign, readable either by the human eye or by a specific machine, whose characteristics may be varied such that each security paper may thereby be distinguished from any other security paper of the same type. Identity markings include, as examples, but are not limited to, serial numbers, bar codes, geometrical sequences, punchings, magnetically encoded zones, and the like.
The present invention concerns more specifically a process for providing at least one composite identity marking on a substrate of a security document, wherein said composite identity marking comprises a first identity marking and at least one second identity marking, wherein said first identity marking is provided by a first marking station, and wherein said second identity marking is provided by a second marking station, wherein a first side of said substrate is brought into marking relationship with said first marking station.
It is already known practice to create security zones on security paper, and in particular on banknotes, by applying images in the form of a film, label or ribbon, so as to make these papers difficult to falsify, particularly to reproduce by the use of photocopiers, the quality of reproduction of which is ever increasing. These images are often optically variable images comprising either a kinegram or a hologram, which has the property of changing appearance, depending on the angle from which they are viewed. These images may be applied either by hot or cold sealing. Machines for applying such images onto otherwise printed banknote sheets are for example described by EP 0625466 or US 6,263,790 or US 6,302,016. Whereas falsifications by means of simple color photocopiers are thereby no longer possible, the affixing of such images does not eliminate falsifications by forgers able to get hold of holograms and the like.
Usually, the identity marking of a security paper comprises a serial number printed on the document . In order to improve the security effect of the usual serial numbers, EP 0768189 teaches to associate an additional alphanumerical security feature to the serial number, borne by a foil or label, which is attached to the security paper by means of a process as mentioned above. According to the process taught by EP 0768189, the information of the foil or label is read, after the fixing step of the foil onto the security paper, by a reading device. The reading device commands a printer, which prints the same information at another place of the security paper, for example in association with the serial number. The identity marking become thus a composite marking, the reproduction or copy of which is more difficult than with the usual serial number alone or with the serial number associated to a hologram image which does not change from paper to paper. This known proposal, however is not quite satisfactory, since each printing process, like the second printing taught by EP 0768189, leads to some misprints, the number of which is low in reliable equipment but never absolutely nil. But users of security documents wish continuously numbered series, and this can not be guaranteed by a marking process comprising the passage through two successive machines. For the same reason, serial numbers are not printed double-sided on banknotes. Document WO 98/36913 discloses a method of marking a transparent window in a security document, made of a polymeric substrate, substantially transparent to a selected laser radiation. The substrate is covered double-sided with an ink absorbing the same radiation, and submitted to said radiation along a marking path, whereby ink on both sides is ablated along said path. The mark appears as a transparent window. A drawback of this technique is that both markings are necessarily in register and that whereas from one side, an alphanumerical sequence can be read, from the other it is not readily readable, since it is the mirror image of an alphanumerical sequence. A similar solution is disclosed in US Patent 6,505,779.
EP 0737572 and WO 03/099579 disclose marking systems comprising typographic, inkjet or laser printers positioned radially relative to a sheet fed drum for printing serial numbers, bar codes and additional security features. All said features are printed on the same side of the security document facing the printers.
Therefore the aim of the present invention is to create a process and an apparatus, producing a double-sided composite identity marking on a security document in the course of a same sheet handling step.
This aim is achieved by a process, wherein said second marking station includes a laser marking station for producing a laser beam, wherein a portion of the second side of said substrate is provided with a layer of material capable of absorbing a substantial amount of radiation emitted by the laser beam, wherein the laser beam is directed onto said layer of absorbing material through said first side and across said substrate to form said second identity marking only on said second side of the substrate. A suitable apparatus for implementing this process comprises a first marking station and at least a second marking station, wherein said apparatus has means for bringing a first side of said substrate into marking relationship with said first marking station and in front of said second marking station, wherein said second marking station is a laser marking station for producing a laser beam and wherein the laser radiation of said laser beam is selected among the radiations capable to pass through the substrate without substantial modification thereof, and capable to react with a predetermined portion of material which absorbs a substantial amount of radiation emitted by the laser beam and which is arranged on the second side of said substrate, said second marking station being arranged in such a manner that said laser beam is directed onto said absorbing material through said first side and across said substrate to form said second identity marking only on said second side of the substrate.
Preferably, the laser is an IR laser with a wavelength of between 0.8 μm and 10.6 μm when the substrate of said security documents is a paper sheet. Preferably, the laser beam has a wavelength of between 0.3 μm and 10.6 μm when the substrate of said security documents is a sheet of polymeric material .
The layer of radiation absorbing material may be any IR absorbent material printed or applied on the substrate. The irradiation shall cause a sufficient temperature elevation to locally evaporate, ablate or burn said layer, or cause locally a photochemical reaction of a photosensitive material, inducing a color change or any other aspect change . For instance, the Optically Variable Devices (OVD) applied on the notes are generally composed of at least a metallic layer that reacts very easily to the laser beam. The material may also be an IR absorbent ink like an offset, intaglio, silkscreen or flexographic ink. The OVI inks, composed of metallic particles, react very well to the laser beam. The process may provide a third identity marking, or even more, controlled by the same processing unit in the same way as the second marking.
Thus, contrarily to the aforementioned processes of the prior art, wherein the identity markings are either merely printed on one side or necessitate two handlings and additional replacement of misprints, in the process according to the present invention, the first and second identity markings are generated within one handling step in the same marking machine .
Whereas the second marking station is a laser marking station, the first, and eventually further marking stations may use different marking techniques. By way of example, the first identity marking may be achieved by means of a mechanical typography process. The alphanumerical characters may be realized by a set of electromechanical numbering boxes known in the art, wherein the characters selected for each print are controlled by the processing unit. Other techniques, like inkjet processes or embossing processes may be used.
The second identity marking may comprise the same alphanumerical signs as the first identity marking at various locations of the security paper, determined by the affixed foils or labels and/or portions of the second side of the sheet printed with light absorbing ink. Thereby the security document may receive a double-sided serial number.
The second marking may also materialize data calculated from the first identity marking by means of a mathematical or otherwise logical rule.
For avoiding that forgers could be able to find the aforesaid mathematical/logical rule, the data which shall be materialized into a second identity marking may be a randomly generated data, each one of said data being recorded in an authenticating data base in association with a corresponding first identity marking.
Preferably, for rendering falsification more difficult, additional identity markings should not exhibit the same visible signs as the first and/or second identity marking. Such an additional identity marking may be performed for example with non-visible ink.
For providing a plurality of sequentially distributed composite markings on the substrate, the apparatus comprises a processing unit, wherein said processing unit issues sequentially ordered controlled signals to said first and second marking stations, such that each of said stations achieves, on each side of said substrate, sequentially determined markings able to form with corresponding markings achieved on the other side of the substrate a composite identity marking, wherein said second identity marking and said first identity marking of each composite identity marking correspond together by virtue of said linking rule
When the sets of security papers are assemblies in form of sheets, where the individual security papers occupy adjacent fields distributed in rows and columns, preferably each marking station comprises a plurality of component marking devices, the operating zone of each marking device corresponding to one column, and the control signals emitted by the processing unit are distributed to the different component marking devices, the signals received by each component marking device being sequentially elaborated by means of the authenticating data base in function of the location of the component marking device.
According to the present invention, it is not necessary to read the first identity marking imprinted on a security paper for determining the second and following identity markings. Nevertheless, it is advisable that after achievement of the complete composite identity markings on a set of security papers, the latter is led to a checking device verifying the correct achievement of the whole composite identity markings. This quality control may be understood as a first authenticating test.
After complete identity marking of the sheets of security papers, the same are cut along in rows and columns, so as to form sequential series of isolated security papers. The security papers may be bundled, the papers of a bundle bearing a continuous sequence of alphanumerical identity marking.
An example of achievement of the process according to the invention will be described now with reference to the enclosed drawing, which shows in:
Fig. 1, a schematic and partial representation of an embodiment of a numbering machine for numbering banknotes,
Fig. 2, a simplified and schematic representation of a sheet with banknotes in the state at the issue of the numbering machine of Fig. 1, and
Fig. 3, a schematic and partial representation of a further embodiment of a numbering machine for numbering banknotes .
It is known to sequentially number notes assembled in a sheet issuing from a printing machine wherein a base design of the notes is identically printed on all the fields of the sheet, these fields corresponding each to a single note in such a way that after cutting the sheets into single notes, stacks of sequentially numbered notes are formed. Particular achievements of such a process are described more particularly in US 5,590,507 assigned to the same Applicant, the content of which is herewith incorporated into the present description. Now as shown in Fig. 1 of the enclosed drawing, a sheet 1 is placed on a feeding table 2 and guided towards a drum 3 driven in rotation according to the arrow A and leading the sheet 1 towards the operating zones of a plurality of marking devices as will be described later.
Sheet 1 is divided into a plurality of distinct fields, arranged in rows and columns, each field being intended to form a note . In the example represented in Figs . 1 and 2 , sheet 1 comprises three columns 11, 12, 13 and ten rows 1 to
10, each field having, on Fig. 2, a reference numeral [column, row] 111 to 1310.
In a previous step, a photosensitive material absorbing in the IR, schematically represented by circles 60 on Fig. 2, was applied on all fields, on the rear side of sheet 1. Suitable materials are IR absorbent labels like OVD or IR absorbent ink like OVI and some offset, intaglio, silkscreen or flexography inks .
The numbering machine shown in Fig. 1 comprises a pair of marking stations 5 and 6, disposed at the periphery of drum 3, spaced around the drum. Each station comprises three similar component marking devices 51, 52, 53 and 61, 62, 63 respectively, localized each in front of one of the columns
11, 12, 13. While the components of station 5 can work according to the technology of mechanical typography, or another technology, e.g. ink-jet technology or embossing technology, components of station 6 work according to laser marking technology. It is also possible to have the components of station 5 placed after the laser marking station 6. Indeed, the location of the laser marking 6, before or after the marking station 5 (or with respect to other marking stations) , has no particular importance within the scope of this invention. The components of the station 5 with mechanical typography can be arranged as taught by US 5,660,106, for example. Mechanical numbering boxes could also be used. Advantages of mechanical typography are magnetic and/or IR security as well as high resolution and slight embossing. On the other hand there is lack of flexibility in terms of fonts and data. Ink-jet technology does not provide such a high resolution. However, this technology provides high flexibility in terms of fonts and change of jobs.
The laser marking station can be a YAG type laser advantageously with a laser source located outside the machine and the laser light transmitted by optical fiber to laser heads mounted on the machine. The power has to be adjusted in order to allow an adequate reaction of the absorbing, and/or photosensitive/reactive material with the laser beam.
Sheet 1 is for instance made of cotton based paper or polymer material with a thickness of about 100 μm, other suitable materials being possible provided the material is substantially transparent to the radiation emitted by the laser. Accordingly, the laser beams of station 6 pass through this substrate without any visible damage to the substrate, whereas a photosensitive/reactive material applied on the opposite side of the substrate absorbs the laser energy. The material is either transformed (like for OVD) , ablated (like for IR absorbent inks) or partially ablated in the case of an ink composed of two types of pigments, one transparent to the laser wavelength and the other one absorbent to the same wavelength. In this latter case, a colour change can be observed after marking.
A processing unit 8 sends control signals to all the components 51, 52, 53, 61 62, 63 of the different marking stations. Components 51 and 61 act on the fields of col. 11, components 52 and 62 on the fields of col .12 and components 53 and 63 on the fields of col . 13. Thus the components of station 5 print a serial number on the front side of the notes at locations indicated by 50 on Fig. 2, and components of station 6 provide on the rear side, at locations of the note indicated by 60 a second partial identity marking, linked to the particular serial number of the note by a mathematical rule as mentioned above.
Fig. 2 shows the appearance of sheet 1 after having been handled by the numbering machine. Each field 111 to 1310 is provided with a complete identity marking sequentially determining the note. Partial markings 50 are serial number and partial markings 60 on the other side of sheet 1 are, for example, the same serial number, or machine readable image information or other figures linked or related to the serial number.
When leaving drum 3, sheet 1 is led to pass in front of a checking device 9, which verify that the identity markings have been correctly provided.
Fig. 3 shows an other embodiment of a marking apparatus comprising a higher number of partial marking devices. Sheets are fed to a drum 3' via a feeding roller 14, in the direction of arrow A. They pass first in front of an ink-jet marking station 5' ' ', then in front of a laser marking station 61 and then successively in printing relationship with two typographic printers 5' and 5'1. All the four partial markings are determined by a common processing unit (not shown) .
The first side of the sheet is checked for erroneous markings by a first checking device 9 ' , while the sheet is still on the drum 3 ' . A second checking device controls the marking performed by the laser marking station 6' after passage of the sheet over an exit/transfer roller 14 , the sheet leaving the apparatus in the direction of arrow B.
The further cutting and bundling operations may be performed as taught by US 5,590,507. Those skilled in the art will understand that a numbering machine as shown by Fig. 3 could be provided with other combinations of marking stations, like an ink-jet station and a typographic station for marking the first side and two laser marking stations for providing two different markings on the second side, for example a marking on an affixed label and a marking on a portion printed with IR-light absorbing ink.
Those skilled in the art will also understand that the components 51, 52, 53 of the marking station 5 and the components 61, 62, 63 of the marking station 6 could be located on successive drums, on the same machine.

Claims

Claims
1. A process for providing at least one composite identity marking on a substrate (1) of a security document, wherein said composite identity marking comprises a first identity marking and at least one second identity marking, wherein said first identity marking is provided by a first marking station (5, 5', 5'', 5'''), and wherein said second identity marking is provided by a second marking station, wherein a first side of said substrate (1) is brought into marking relationship with said first marking station (5, 5',
5 ' ' , 5 ' ' * ) , characterized in that said second marking station includes a laser marking station (6, 6') for producing a laser beam, in that a portion of the second side of said substrate (1) is provided with a layer of material (60) capable of absorbing a substantial amount of radiation emitted by the laser beam, wherein the laser beam is directed onto said layer of absorbing material (60) through said first side and across said substrate to form said second identity marking only on said second side of the substrate (1) .
2. A process as claimed in claim 1, characterized in that the laser beam has a wavelength of between 0.8 μm and 10.6 μm and in that the substrate is a sheet of paper.
3. A process as claimed in claim 1, characterized in that the laser beam has a wavelength of between 0.3 μm and 10.6 μm and in that the substrate is a sheet of polymeric material .
4. A process as claimed in anyone of the preceding claims, characterized in that said layer of absorbing material is a layer of an optically variable device (OVD) .
5. A process as claimed in anyone of claims 1 to 3 , characterized in that said layer of absorbing material is an ink layer.
6. A process as claimed in claim 5, characterized in that said ink layer can be deposited by offset, intaglio, silkscreen or flexographic processes.
7. A process according to anyone of claims 1 to 6, characterized in that said first identity marking is achieved by means of a process selected from mechanical typography processes (5, 5', 5'1), inkjet processes (S''1) and embossing processes .
8. A process according to anyone of claims 1 to 7, characterized in that said first marking is an alphanumerical marking, and in that said first (5, 5', 5'', 5''') and second (6, 6') marking stations are controlled by a common processing unit (8) associating said second identity marking to said first alphanumerical identity marking by a mathematical or logical linking rule.
9. A process according to claim 8, characterized in that a plurality of sequentially distributed composite identity markings comprising first and second identity markings are provided on said substrate (1) and in that said processing unit issues sequentially ordered controlled signals to said first and second marking stations, such that each of said stations achieves, on each side of the substrate (1) , sequentially determined markings able to form with corresponding markings achieved on the other side of the substrate (1) a composite identity marking, wherein said second identity marking and said first identity marking of each composite identity marking correspond together by virtue of said linking rule.
10. A process according to claim 8 or 9, characterized in that each said second identity marking is univocally determined by means of said linking rule, said linking rule being an algorithmic rule or a sequence of data stored in an authenticating database.
11. A process as claimed in anyone of the preceding claims, characterized in that said second identity marking corresponds to said first identity marking by rules of symmetry, such that the information provided by the second marking appears identical, when the substrate (1) is viewed from the second side, to the information provided by first marking when the substrate (1) is viewed from the first side.
12. A process according to anyone of the preceding claims, wherein said substrate (1) includes a set of security documents which are assembled in form of a sheet where individual security documents occupy adjacent fields distributed in rows and columns (11, 12, 13), characterized in that a composite identity marking is provided on each of a plurality of said individual security documents.
13. A process according to any of the preceding claims, characterized in that after achievement of each complete composite identity marking on said substrate, the latter is led to a checking device (9, 9', 9' ') verifying the achievement of the identity markings.
14. A process according to any of claims 12 to 13, characterized in that a plurality of sheets bearing sets of security documents are processed and in that said sheets, after complete identity marking, are cut in rows and columns, and are processed to form sequential series of isolated security documents.
15. A process according to anyone of the preceding claims, characterized in that said first and second identity markings are provided on said substrate (1) while the substrate (1) is borne on a same processing drum or cylinder (3) .
16. An apparatus for providing at least one composite identity marking on a substrate (1) of a security document, wherein said composite identity marking comprises a first identity marking on a first side of said substrate (1) and at least one second identity marking on a second side of said substrate (1) , said apparatus comprising a first marking station (5, 5', 5' ', 5' ' ') and at least a second marking station, wherein said apparatus has means (3) for bringing a first side of said substrate (1) into marking relationship with said first marking station (5, 5', 5'', 5''') and in front of said second marking station, characterized in that said second marking station is a laser marking station (6, 6') for producing a laser beam and in that the laser radiation of said laser beam is selected among the radiations capable to pass through the substrate (1) without substantial modification thereof, and capable to react with a predetermined portion of material (60) which absorbs a substantial amount of radiation emitted by the laser beam and which is arranged on said second side of said substrate (1) , said second marking station being arranged in such a manner that said laser beam is directed onto said absorbing material (60) through said first side and across said substrate to form said second identity marking only on said second side of the substrate (1) .
17. An apparatus according to claim 16, characterized in that said first identity marking is an alphanumerical marking and in that first and second marking stations are controlled by a common processing unit (8) associating said second identity marking to said first alphanumerical identity marking by a mathematical or logical linking rule.
18. An apparatus according to claim 17, for providing a plurality of sequentially distributed composite identity markings on said substrate (1) , characterized in that said processing unit (8) issues sequentially ordered controlled signals to said first and second marking stations, such that each of said stations achieves, on each side of said substrate (1) , sequentially determined markings able to form with corresponding markings achieved on the other side of the substrate (1) a composite identity marking, wherein said second identity marking and said first identity marking of each composite identity marking correspond together by virtue of said linking rule.
19. An apparatus according to anyone of claims 16 to 18, for processing substrates each including a set of security documents assembled in form of a sheet where the individual security documents occupy adjacent fields (111-1310) distributed in rows and columns (11, 12, 13), characterized in that each marking station (5, 6) comprises a plurality of component marking devices (51, 52, 53; 61, 62, 63), wherein the operating zone of each marking device corresponds to one column, and in that the processing unit (8) is programmed so that control signals are distributed to the different component marking devices, the signals received by each component marking device being sequentially elaborated by the processing unit in function of the location of the component marking device .
20. An apparatus according to any of claims 16 to 19, characterized in that it further comprises a checking device (9, 9', 91') verifying the achievement of the composite identity marking.
21. An apparatus according to anyone of claims 16 to 20, characterized in that said means for bringing the substrate (1) into marking relationship with said first (5, 5', 5'', 5''') and second (6, 6') marking stations is a processing drum or cylinder (3) .
PCT/CH2005/000334 2004-06-17 2005-06-15 Process and apparatus for providing markings on security papers WO2005123415A1 (en)

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JP2007515759A JP2008502501A (en) 2004-06-17 2005-06-15 Method and apparatus for marking on securities
US10/566,744 US7434727B2 (en) 2004-06-17 2005-06-15 Process and apparatus for providing markings security papers
CA2567770A CA2567770C (en) 2004-06-17 2005-06-15 Process and apparatus for providing markings on security papers
DE602005000255T DE602005000255T2 (en) 2004-06-17 2005-06-15 METHOD OF APPLYING MARKINGS ON SECURITY PAPERS
EP05746962A EP1641627B1 (en) 2004-06-17 2005-06-15 Process for providing markings on security papers
AU2005254136A AU2005254136B2 (en) 2004-06-17 2005-06-15 Process and apparatus for providing markings on security papers

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EP04405371.8 2004-06-17
EP04405371A EP1607234A1 (en) 2004-06-17 2004-06-17 Process and apparatus for providing markings on security papers

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EP1607234A1 (en) 2005-12-21
CA2567770C (en) 2012-09-11
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RU2372205C2 (en) 2009-11-10
AU2005254136B2 (en) 2010-06-10
DE602005000255D1 (en) 2006-12-28
US7434727B2 (en) 2008-10-14
EP1641627A1 (en) 2006-04-05
WO2005123415A8 (en) 2006-12-14
AU2005254136A1 (en) 2005-12-29
EP1698484B1 (en) 2010-01-27
US20070012770A1 (en) 2007-01-18
DE602005019134D1 (en) 2010-03-18
EP1698484A2 (en) 2006-09-06
CA2567770A1 (en) 2005-12-29
RU2007101527A (en) 2008-07-27
CN100522609C (en) 2009-08-05
EP1698484A3 (en) 2007-05-23
CN1968824A (en) 2007-05-23
DE602005000255T2 (en) 2007-05-31
ATE456463T1 (en) 2010-02-15
JP2008502501A (en) 2008-01-31

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