EP1268935B1 - Sicherheitspapier mit aufgebrachter codierung aus lumineszierenden melierfasern und verfahren zur maschinellen überprüfung dieser codierung - Google Patents

Sicherheitspapier mit aufgebrachter codierung aus lumineszierenden melierfasern und verfahren zur maschinellen überprüfung dieser codierung Download PDF

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Publication number
EP1268935B1
EP1268935B1 EP00991232A EP00991232A EP1268935B1 EP 1268935 B1 EP1268935 B1 EP 1268935B1 EP 00991232 A EP00991232 A EP 00991232A EP 00991232 A EP00991232 A EP 00991232A EP 1268935 B1 EP1268935 B1 EP 1268935B1
Authority
EP
European Patent Office
Prior art keywords
security paper
fibers
luminescent
mottling fibers
coding
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.)
Expired - Lifetime
Application number
EP00991232A
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German (de)
English (en)
French (fr)
Other versions
EP1268935A2 (de
Inventor
Gerhard Schwenk
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Giesecke and Devrient GmbH
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Giesecke and Devrient GmbH
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
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Publication of EP1268935A2 publication Critical patent/EP1268935A2/de
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Publication of EP1268935B1 publication Critical patent/EP1268935B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/40—Agents facilitating proof of genuineness or preventing fraudulent alteration, e.g. for security paper
    • D21H21/44—Latent security elements, i.e. detectable or becoming apparent only by use of special verification or tampering devices or methods
    • D21H21/48—Elements suited for physical verification, e.g. by irradiation
    • 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.]
    • Y10T428/24835—Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] including developable image or soluble portion in coating or impregnation [e.g., safety paper, 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.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree

Definitions

  • the invention relates to a security paper with mottled fibers with luminescent. Properties and encoding, as well as a method of verifying this encoding.
  • mottled fibers as a security feature for security documents has long been known. They are usually made of short plastic or cotton fibers, which are incorporated into security papers during papermaking. Mottling fibers have the advantage over other security features, such as planchettes or mica flakes, that mottled fibers are smaller and visually less noticeable and therefore exert less of a disruptive effect on the aesthetic overall impression of the security document.
  • DE 677 711 discloses under UV light fluorescent mottled fibers which are added to the paper pulp prior to sheet formation, so that the mottled fibers are then distributed arbitrarily in the volume of the finished security paper. It is also possible to use differently fluorescent mottled fibers, so that mixed fluorescence occurs under UV illumination.
  • DE 3122 470-C2 also discloses a security paper with luminescent mottled fibers incorporated therein.
  • the mottled fibers here consist of cellulose acetate, which are dyed in the fiber volume with narrow-band emitting luminescent substances from the group of the lanthanide chelates. These luminescent substances can be introduced into the fiber material in concentrations up to 20 times higher than the previously known luminescent substances, and moreover have a relatively narrow-band emission spectrum.
  • the mottled fibers can also become security threads twisted or interwoven. If different luminescent individual fibers are used for this purpose, it is also possible to produce a coding which is based on an evaluation of the presence or absence of certain luminescent substances.
  • the present invention is therefore based on the object to propose a security paper with luminescent mottled fibers, which represent an encoding, the encoding should be very easy to read by machine.
  • the invention has for its object to propose a method for checking the coding.
  • the invention is based on the finding that for a machine examination of the mottled fibers with a sufficient signal / noise ratio, the mottled fibers with different luminescent properties have to be arranged sufficiently spatially separated from one another. For this reason, non-overlapping partial areas are defined on the security paper according to the invention, in each of which a specific type of mottled fibers with specific luminescent properties is arranged.
  • An encoding can be represented by a defined geometric arrangements of the subregions, and / or by the presence or absence of the mottled fibers.
  • the mottled fibers with the different properties can be easily located and measure the luminescent properties independently without mutual interference. Since only mottled fibers having a certain luminescent property are present in a subregion, the intensity of the measurement signal already increases compared with the known security documents due to the higher surface density of mottled fibers in the measuring region to be tested.
  • the signal yield can additionally be increased if special luminescent substances with an intensity-intensive narrow-band luminescence emission are used, as described, for example, in US Pat. No. 5,448,582.
  • These luminescent substances are multiphase systems which contain an optically "pumpable" light-emitting material, light-scattering centers and a transparent matrix material. These materials show laser-like effects with a spectrally extremely narrow-band emission. Another advantage of these materials is that the wavelength of the emission band can be adjusted in limited areas during manufacture.
  • the light-scattering centers consist of particulate, transparent materials with a preferably high optical refractive index.
  • the luminescent substance absorbs part of the flashlight and is thereby transferred in an excited, so-called "optically pumped” state.
  • the luminescent light is formed by spontaneous emission from the excited state, wherein at least a portion of the emitted luminescent light does not leave the material directly, but is partially scattered several times at the light-scattering centers. This leads to a high amplification of the emitted light intensity as well as to particularly narrow emission bands.
  • the use of luminescent substances with narrow-band emission has the advantage that in the measurement of the luminescence light, the spectral sensitivity range of a detector can be tuned to a narrow spectral interval in which the emission band lies. This suppresses background light from adjacent spectral regions in the measurement and improves the signal-to-noise ratio.
  • the measurement signal is not determined solely by the intensity of the emitted luminescence radiation of a pigment, but also by the concentration of luminescent substance that can be introduced into the mottling fiber and by the surface density of the mottling fibers on the paper.
  • mottled fibers visually attract attention with increasing surface density and lead to an increasing disturbance of the overall aesthetic impression of the security paper, which is often printed with an artistic representation.
  • the areal density of mottled fibers should therefore be in the range 2 to 20 mottled fibers per square centimeter.
  • the disturbance of the overall aesthetic impression can also be reduced by suitable positioning of the subregions on the security paper. That is, the partial areas are preferably arranged so that the main motif of the artistic representation is not covered.
  • the mottled fibers should appear as little as possible when the security document is viewed visually, according to a preferred embodiment, the mottled fibers consist of transparent plastic fibers which are colored in the volume with luminescent substances which are also largely transparent in the visual spectral range.
  • the luminescent substances have a certain intrinsic color, they can also be introduced into the mottling fiber in such low concentrations, given a corresponding luminescence light intensity, that the fiber itself still appears to be largely transparent.
  • the fibers can also be provided with the luminescent substance only superficially, for example in a dyebath
  • fiber materials other materials can be used, which can be processed into thin fibers, such as silk or cotton.
  • the partial regions in which the mottled fibers are arranged preferably have the form of strips which extend over the entire width of the security document. They preferably have a width in the range of 5 mm to 30 mm. However, the subregions may also have any other outline shapes, such as rectangular, round, oval, star-shaped, etc.
  • the mottled fibers are introduced in the production of the security paper so that the mottled fibers are at least partially crosslinked with the fiber web of the paper and therefore at least partially covered by paper fibers on the surface of the paper.
  • the so-called Wilcox process represents a suitable method for introducing mottling fibers into endless, strip-shaped subregions.
  • the mottled fibers are slurried in an aqueous suspension and, during papermaking, through a tube whose end is a special outlet nozzle has applied to the rotating round screen near the point at which the sheet formation on the round screen just starts.
  • a negative pressure generated within the round screen the layer of the mottled fibers thus applied is directly dewatered, whereby the mottled fibers, together with the first layer of the paper fibers accumulating on the round screen, lie firmly on the round screen.
  • the fibers may be applied to the wire in a similar manner.
  • a plurality of application stations for mottled fibers with different luminescent properties are arranged parallel to one another in the paper machine.
  • the feeding devices of the mottled fibers are controlled according to the applied coding. If the coding consists solely in the geometric arrangement of the subregions provided with different mottled fibers, then the feeders are positioned correspondingly on the paper machine at the beginning of the paper production. The Melierfaserzucht then takes place continuously.
  • the coding consists exclusively or additionally in the presence or absence of one or more types of mottled fibers, the supply of mottled fibers must be stopped in accordance with the coding. If the coding does not change within the production of a paper web, it is sufficient to place the required feeding devices at the beginning of production.
  • the coding can represent any information, such as the denomination, issue date, issuing country or the like.
  • the finished security paper which, in addition to the coding according to the invention, of course further security elements, such as e.g. a security thread or the like, is then further processed in a conventional manner, in particular printed and cut into individual security documents, such as banknotes, stocks, checks or the like.
  • the coding is measured with corresponding sensors for the respective luminescent property of the mottled fibers to be evaluated and compared with a reference value.
  • the luminescent property to be evaluated can be, for example, the luminescence wavelength or the decay time of the luminescence radiation.
  • FIG. 1 shows a top view of a security document 1, here a banknote made of security paper 2.
  • a security document 1 here a banknote made of security paper 2.
  • the edge 3 of an image field is shown in dashed lines, wherein often an artistically designed pictorial representation 4 (not shown in the figure) is printed.
  • three strip-shaped control areas 8a, 8b, 8c are indicated by dotted lines. They indicate the areas in which the detector checks the properties of the luminescent mottled fibers. Their location on the security document 1 is therefore determined by the coding to be tested.
  • the distance between the control areas 8a and 8b is denoted by a and the distance between the control areas 8b, 8c to b, wherein the distances a, b are different in the embodiment shown.
  • the ratio between the distances a, b can be, for example, an integer to get voted.
  • Within the three strip-shaped control areas 8a, 8b, 8c are strip-shaped partial areas 5a, 5b, 5c in which mottled fibers are introduced into the security paper 2.
  • the boundary lines of the strip-shaped portions 5a, 5b, 5c are shown in FIG. 1 by solid lines. However, the solid lines are for illustrative purposes only and are not present on a genuine security document.
  • all strip-shaped portions 5a, 5b, 5c are provided with mottled fibers of the same type A, i.
  • all subregions 5a, 5b, 5c are mottled fibers with the same luminescent property.
  • the coding is represented in this embodiment solely by the distances a, b of the partial regions 5a, 5b, 5c or the control regions 8a, 8b, 8c.
  • FIG. 2 shows the example of two security documents 1a, 1b another possibility for a coding according to the invention.
  • the distance a between the individual control areas 8a, 8b, 8c, 8d is constant and the coding is represented by the presence or absence of one or more partial areas with special mottling fibers within the control areas 8a, 8b, 8c, 8d.
  • the mottled fibers arranged in the subregions differ here in the luminescent property to be tested.
  • the document 1a for example, has only within the control areas 8a, 8b subareas 7a, 7b in which there are mists of fibers A or B, whereas the document 1b only in the control areas 8a, 8d with mica fibers A, D having portions 7a, 7d is provided.
  • control areas used as well as the number of different mottled fibers can be varied as desired.
  • the same mottling fibers with the same luminescent substance can also be used for all control areas. This has the advantage that the structure of the sensor can be made much simpler.
  • the distances of the control areas can additionally be varied.
  • any properties of the luminescent substances contained in the mottling fibers can be evaluated, such as eg the luminescence wavelength or the decay time of the luminescence radiation.
  • FIG. 3 shows, in the case of the wavelength-dependent evaluation, a possible spectral distribution of the emission wavelengths of the coding system described above from four types A, B, C, D of mottled fibers, which differ in the simplest case shown here, at least with respect to their emission wavelength.
  • the luminescent substance A accordingly emits at shorter wavelengths than the luminescent substances B, C, D.
  • all substances A, B, C, D each have a very narrow-band luminescence emission which does not overlap with that of the other luminescent substances used, so that the luminescent substances A, B, C, D are very easy to distinguish from each other.
  • the luminescence intensity of the substances is also sufficiently high so that the substances can be reliably detected and detected by machine.
  • FIG. 4 shows schematically a possible arrangement for detecting and evaluating a coding which is represented by means of the luminescent substances or mottled fibers having emission lines shown in FIG.
  • the checking of the bank note takes place in a bank note processing device, by means of which the bank notes are guided past the sensors with the aid of a transport system at high speeds.
  • this transport of the banknote 2 according to the invention is indicated by the arrow 11.
  • the banknote passes by an illumination source 12 whose radiation is focused onto the document with the aid of an optical system 13.
  • the illumination source 12 is chosen so that it emits radiation of the excitation wavelength of the individual luminescent substances. Are the excitation wavelengths of the individual luminescent substances in different wavelength ranges, it may be useful to use as the illumination source a plurality of excitation sources, each of which emits light in the range of one of the excitation wavelengths.
  • This detector 16 preferably includes a spectrometer with a diode array, each of the diodes being sensitive to one of the emission wavelengths 23a to 23d.
  • the detector takes in the control areas 8a, 8b, 8c 8d associated measuring channels on the signals shown in Fig. 5.
  • Fig. 5 the signals I of the individual Melierfaserart A, B, C, D associated measuring channels over time t are plotted.
  • the dashed time slots 30a, 30b, 30c, 30d correspond to the control areas 8a, 8b, 8c, 8d and denote the measurement windows, in each of which a signal is expected. If the note 1a passes under the sensor in the direction of the arrow 11, the control area 8d is first illuminated. Since there are no mottled fibers within this control range, the associated measuring channel does not detect any signal in the time window 30d. Since the mottling fibers of type C are not available, the associated measuring channel also receives no signal.
  • the sensor Only when the partial region 7b or the control region 8b is transported past under the sensor arrangement does the sensor record the emission band 23b of the luminescent substance B in the time window 30b. analog applies to the subsequent subarea 7a or the signal 23a in the time window 30a.
  • the presence of the luminescence emission 23a, 23b, 23c, 23d in the correct time window 30a, 30b, 30c, 30d means a binary "1" and the absence of a binary "0", then the signals in FIG the code 1 1 0 0 shown.

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  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Paper (AREA)
  • Credit Cards Or The Like (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
EP00991232A 1999-12-23 2000-12-20 Sicherheitspapier mit aufgebrachter codierung aus lumineszierenden melierfasern und verfahren zur maschinellen überprüfung dieser codierung Expired - Lifetime EP1268935B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19962790 1999-12-23
DE19962790A DE19962790A1 (de) 1999-12-23 1999-12-23 Sicherheitspapier mit aufgebrachter Codierung aus lumineszierenden Melierfasern
PCT/EP2000/013030 WO2001048311A2 (de) 1999-12-23 2000-12-20 Sicherheitspapier mit aufgebrachter codierung aus lumineszierenden melierfasern

Publications (2)

Publication Number Publication Date
EP1268935A2 EP1268935A2 (de) 2003-01-02
EP1268935B1 true EP1268935B1 (de) 2006-02-22

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EP00991232A Expired - Lifetime EP1268935B1 (de) 1999-12-23 2000-12-20 Sicherheitspapier mit aufgebrachter codierung aus lumineszierenden melierfasern und verfahren zur maschinellen überprüfung dieser codierung

Country Status (13)

Country Link
US (1) US6974623B2 (ja)
EP (1) EP1268935B1 (ja)
JP (1) JP4745580B2 (ja)
CN (1) CN1193133C (ja)
AT (1) ATE318342T1 (ja)
AU (1) AU777385B2 (ja)
CA (1) CA2395556C (ja)
DE (2) DE19962790A1 (ja)
ES (1) ES2258034T3 (ja)
HK (1) HK1052207B (ja)
RU (1) RU2258109C2 (ja)
WO (1) WO2001048311A2 (ja)
ZA (1) ZA200204237B (ja)

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WO2011029543A2 (de) 2009-09-08 2011-03-17 Bundesdruckerei Gmbh Bilumineszente melierfasern
WO2011029544A1 (de) 2009-09-08 2011-03-17 Bundesdruckerei Gmbh Kunstatofffolie mit darauf fixierten melierfasern

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DE19962790A1 (de) * 1999-12-23 2001-06-28 Giesecke & Devrient Gmbh Sicherheitspapier mit aufgebrachter Codierung aus lumineszierenden Melierfasern
US7122248B2 (en) * 2001-02-21 2006-10-17 Honeywell International Inc. Security articles
DE10148122A1 (de) * 2001-09-28 2003-04-24 Giesecke & Devrient Gmbh Sicherheitspapier
US20030194578A1 (en) * 2001-12-20 2003-10-16 Honeywell International, Inc. Security articles comprising multi-responsive physical colorants

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011029543A2 (de) 2009-09-08 2011-03-17 Bundesdruckerei Gmbh Bilumineszente melierfasern
WO2011029544A1 (de) 2009-09-08 2011-03-17 Bundesdruckerei Gmbh Kunstatofffolie mit darauf fixierten melierfasern
DE102009040746A1 (de) 2009-09-08 2011-03-17 Bundesdruckerei Gmbh Kunststofffolie
DE102009040747B3 (de) * 2009-09-08 2011-07-21 Bundesdruckerei GmbH, 10969 Bilumineszente Melierfasern, eine diese aufweisende Folie, Dokument mit diesen sowie Verfahren zu ihrer Herstellung und ein Verfahren zur Herstellung eines Dokuments mit diesen
EP2724858A1 (de) 2009-09-08 2014-04-30 Bundesdruckerei GmbH Dokument mit Melierfasern und Verfahren zu dessen Herstellung

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WO2001048311A2 (de) 2001-07-05
RU2258109C2 (ru) 2005-08-10
RU2002119562A (ru) 2004-01-27
ZA200204237B (en) 2003-04-09
EP1268935A2 (de) 2003-01-02
US20030104176A1 (en) 2003-06-05
JP2003525770A (ja) 2003-09-02
DE19962790A1 (de) 2001-06-28
DE50012269D1 (de) 2006-04-27
HK1052207B (zh) 2005-09-09
ES2258034T3 (es) 2006-08-16
JP4745580B2 (ja) 2011-08-10
HK1052207A1 (en) 2003-09-05
AU777385B2 (en) 2004-10-14
CA2395556A1 (en) 2001-07-05
CN1193133C (zh) 2005-03-16
CN1409789A (zh) 2003-04-09
ATE318342T1 (de) 2006-03-15
AU3161901A (en) 2001-07-09
US6974623B2 (en) 2005-12-13
CA2395556C (en) 2010-02-02
WO2001048311A3 (de) 2002-02-21

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