EP0374763B1 - Security elements in the form of threads or strips to be embedded in security documents, and method of producing and testing same - Google Patents
Security elements in the form of threads or strips to be embedded in security documents, and method of producing and testing same Download PDFInfo
- Publication number
- EP0374763B1 EP0374763B1 EP89123254A EP89123254A EP0374763B1 EP 0374763 B1 EP0374763 B1 EP 0374763B1 EP 89123254 A EP89123254 A EP 89123254A EP 89123254 A EP89123254 A EP 89123254A EP 0374763 B1 EP0374763 B1 EP 0374763B1
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- EP
- European Patent Office
- Prior art keywords
- security
- sheet
- sheets
- carrier
- authenticity
- 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
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Classifications
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- 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
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- 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
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/02—Testing electrical properties of the materials thereof
- G07D7/026—Testing electrical properties of the materials thereof using capacitive sensors
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D7/00—Testing specially adapted to determine the identity or genuineness of valuable papers or for segregating those which are unacceptable, e.g. banknotes that are alien to a currency
- G07D7/20—Testing patterns thereon
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- 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
- Y10S428/90—Magnetic feature
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- 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.]
- Y10T428/24851—Intermediate layer is discontinuous or differential
- Y10T428/24868—Translucent outer layer
- Y10T428/24876—Intermediate layer contains particulate material [e.g., pigment, etc.]
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- 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
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- 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
- Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
- Y10T428/256—Heavy metal or aluminum or compound thereof
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- 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
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31678—Of metal
-
- 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
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31678—Of metal
- Y10T428/31681—Next to polyester, polyamide or polyimide [e.g., alkyd, glue, or nylon, etc.]
Definitions
- the invention relates to a security element in the form of a thread or tape for embedding in a security document, consisting of a carrier film and at least one marking substance applied thereon, e.g. B. in the form of a coating that serves the visual and / or mechanical authenticity detection and methods for producing and testing the same.
- Such a security thread is such.
- the metal coating usually the outside of the thread.
- the metallic coating can easily be destroyed by mechanical loads during the production of the thread, and even in later use it is often the case that the metallic coating loses its originally high-gloss properties and becomes matt over time. In serious cases, the metallic layer can also be completely interrupted, as a result of which the security thread loses not only its reflective property but also its mechanically verifiable electrical conductivity over the entire thread length.
- the structure is usually asymmetrical and this asymmetry leads to the curl of the thread and the formation of garlands.
- the thread can therefore not be embedded in the fiber layer of a forming paper layer in a consistently flat position.
- the areas of the paper web in which the security thread does not come to lie in the plane of the paper layer must then be separated out as unusable. This committee increases the cost of paper production.
- the invention is based on the object of creating a security element which, while avoiding the above-mentioned. Disadvantages can be easily produced and embedded in a security document.
- composition of the security thread according to the invention from two foils pretreated in the same way gives the thread a completely symmetrical structure.
- the two carrier films are preferably obtained from the same film, in which a larger film web is first provided, the corresponding coatings are provided in a coating system, the film web is then cut into two longitudinal webs and these longitudinal webs are overlaid and connected to one another in the form according to the invention. This also avoids fluctuations that could arise due to the production of the film webs in two different production processes.
- the security thread which is pulled off a roll during paper production and is guided to the paper screen at a predetermined position in the pulp, maintains its position via this path in which it is guided freely, without rotating about its longitudinal axis.
- the reject which arises in the case of threads with an asymmetrical structure due to the flatness of the thread being flat in the paper plane can thereby be avoided.
- each layer containing a marking substance is present twice.
- the absence of a marking substance in one layer does not lead to a total loss of the authenticity feature, unless the unlikely event occurs that the substance is also missing at the same point in the counter-layer.
- the amount of substance is only half as large, but this reduction in the amount can easily be compensated for by appropriate design of the detection apparatus.
- the two carrier foils are generally connected to one another by means of an adhesive layer, suitable adhesives being selected depending on the circumstances.
- an adhesive material is preferably used which is permeated with electrically conductive pigments.
- the two metal layers are electrically connected to one another by these electrically conductive pigments. If there is a break in the metal layer during the production of the film or when the security thread is embedded in the paper, the adhesive layer serves as a bridging element to maintain the electrical connection over the entire length of the security element.
- resistant coatings such as, for. B. a layer of paint or a layer of paint
- plastic surfaces can usually be printed better than z. B. metallic surfaces.
- the internal coatings can be made thin, since they are now adequately protected against mechanical loads by the outer plastic films.
- the metallic layer is first applied during the production of the carrier foils and the magnetic layer is only applied to this metallic layer. After the two foils have been superimposed, the metallic reflective layer thus covers the magnetic layer, which has a black or brown intrinsic color.
- This thread can then also be stored in the print image area of the security document, since the thread cannot be recognized or can only be recognized as a faintly bright area due to its reflecting surface in incident light and thus does not disturb the visual impression of the print image. Only when viewed in transmitted light can this thread be recognized as a dark streak in the paper.
- the security threads can also be embedded in the document by methods known per se so that they appear on the surface in places. This is a particular advantage of the invention. Due to the exposed position of the security thread on the document surface, it is exposed to special mechanical loads due to daily use. In the security thread according to the invention, however, plastic layers which are resistant to mechanical and chemical influences, such as, for. B. polyester films, the outer layers that protect the sensitive feature layers. In spite of its exposed position, the thread shows no signs of wear.
- the double presence of a marking substance can advantageously be used for the authenticity check in the case of the metallic or electrically conductive coating.
- the carrier films are the two outer, transparent plastic films 2, 3, preferably made of polyester. Each of these plastic films is provided on its inner side with a metal coating 4, 5. For this purpose, the films are coated with an aluminum, nickel or also chrome layer by means of suitable coating processes (vapor deposition, spraying, sputtering, etc.). The layer thickness is usually far below 1 ⁇ . After their coating, these two carrier foils are connected via an adhesive layer 6. Suitable adhesives are e.g. B. laminating glue, which are activated by heating over a certain temperature range or polymerisation glue, which cure when heated and / or UV radiation.
- this thread Due to its metallic coating, this thread has highly reflective properties and is therefore only recognizable as a dark stripe in transmitted light, since when viewed in incident light, the light reflected by the thread is scattered through the paper layer above it.
- the outer polyester film makes the thread resistant to a large number of chemical solvents and also fulfills the required conditions such as high flexibility and tear resistance due to the excellent mechanical properties of polyester.
- FIG. 2 shows a thread in which - again between two polyester films 8, 9 - the layer materials used for authenticity detection are embedded.
- Each of these foils was first covered with a metallic one Coating 10, 11 provided and a magnetic layer 12, 13 is applied to this metallic coating.
- Suitable magnetic materials or coating materials are known from DE-PS 16 69 245.
- both carrier foils are overlaid with their coated side facing inwards and connected to one another with the aid of an adhesive layer 14.
- the adhesive layer is to be coordinated with a good connection of the magnetic layers located here.
- the films can also be coated on both sides. In this case, at least one of the layer materials then comes to the outside. Materials that withstand the chemical and mechanical loads must therefore be selected for these outer layers 15. It can be z. B. is a full-surface paint coating that has a certain color or luminescent properties. However, a pattern or alphanumeric characters can also be partially printed on, which can be read directly or with the aid of appropriate magnification devices. Since the threads usually have a width of 0.5 mm to max. 1.5 mm, the printing of the thread with characters of this size requires complex printing techniques and corresponding devices, which additionally increases the security against counterfeiting.
- the two carrier films from which the security thread according to the invention is composed are preferably obtained from a single film which is provided with the desired layers on one or both sides in advance.
- the side of the film that carries the later internal coatings is additionally provided with an adhesive surface.
- By folding the film or cutting and appropriate superimposition of the two web halves created the desired double-layer film.
- these can be filled by a roller laminating system known per se (FIG. 3).
- the two films After passing through two press rolls 23 and subsequent cooling, the two films are firmly connected to one another and can be cut into individual strips of the desired width in a corresponding cutting system.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Credit Cards Or The Like (AREA)
- Paper (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Investigating Or Analysing Biological Materials (AREA)
- Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
Abstract
Description
Die Erfindung betrifft ein Sicherheitselement in Form eines Fadens oder Bandes zur Einbettung in ein Sicherheitsdokument, bestehend aus einer Trägerfolie und mindestens einer darauf aufgebrachten Markierungssubstanz, z. B. in Form einer Beschichtung, die der visuellen und/oder maschinellen Echtheitserkennung dient sowie Verfahren zur Herstellung und Prüfung desselben.The invention relates to a security element in the form of a thread or tape for embedding in a security document, consisting of a carrier film and at least one marking substance applied thereon, e.g. B. in the form of a coating that serves the visual and / or mechanical authenticity detection and methods for producing and testing the same.
Es ist eine zur Absicherung von Sicherheitsdokumenten bekannte Maßnahme, in diese Dokumente Sicherheitselemente einzubetten, die entweder besondere maschinell nachweisbare physikalische Eigenschaften aufweisen oder auch von ihrem visuellen Aussehen her so gestaltet sind, daß sie als Echtheitsmerkmal für das Sicherheitsdokument dienen können. Derartige Sicherheitselemente sind z. B. Fäden oder Bänder, die im Rahmen der Papierherstellung in die sich noch bildende Papierlage direkt eingebettet werden.It is a known measure for securing security documents to embed security elements in these documents which either have special mechanically detectable physical properties or are also designed in terms of their visual appearance in such a way that they can serve as an authenticity feature for the security document. Such security elements are such. B. threads or tapes, which are embedded directly in the paper layer still forming in the context of papermaking.
Ein derartiger Sicherheitsfaden ist z. B. aus der DE-OS 27 54 267 bekannt, wobei eine Trägerfolie aus Polyester oder Zellulose mit verschiedenen Materialien beschichtet wird. Als visuell und/oder maschinell lesbare Echtheitsmerkmale dienen z. B. eine Aluminiumbedampfung, eine Magnetbeschichtung, eine Beschichtung mit Röntgenstrahl absorbierendem Material und/oder ein lumineszierendes Material.Such a security thread is such. B. from DE-OS 27 54 267, wherein a carrier film made of polyester or cellulose is coated with different materials. As a visually and / or machine-readable authenticity features serve z. B. an aluminum vapor deposition, a magnetic coating, a coating with X-ray absorbing material and / or a luminescent material.
In dieser Schrift werden verschiedene Aufbauten derartiger Sicherheitsfäden aufgezeigt, die sich in der Schichtanordnung und/oder den dabei verwendeten Materialien unterscheiden. Alle dort gezeigten Beispiele haben aber zumindest einen, meist sogar mehrere der nachfolgend aufgezeigten Nachteile.In this document, various structures of such security threads are shown, which differ in the layer arrangement and / or the materials used. However, all the examples shown there have at least one, usually even several of the disadvantages shown below.
So bilden z. B. die gegen mechanischen Abrieb und atmosphärische Einflüsse anfälligen Schichtmaterialien, wie z. B. die Metallbeschichtung, meist die Außenseite des Fadens. Durch mechanische Belastungen bei der Herstellung des Fadens kann die metallische Beschichtung aber leicht zerstört werden und auch im späteren Gebrauch ist es häufig der Fall, daß die metallische Beschichtung seine ursprünglich hochglänzende Eigenschaft verliert und mit der Zeit matt wird. In gravierenden Fällen kann es auch zu einer vollständigen Unterbrechung der metallischen Schicht kommen, wodurch der Sicherheitsfaden nicht nur seine reflektierende Eigenschaft, sondern auch seine maschinell nachprüfbare elektrische Leitfähigkeit über die gesamte Fadenlänge verliert.So z. B. against mechanical abrasion and atmospheric influences layer materials such. B. the metal coating, usually the outside of the thread. However, the metallic coating can easily be destroyed by mechanical loads during the production of the thread, and even in later use it is often the case that the metallic coating loses its originally high-gloss properties and becomes matt over time. In serious cases, the metallic layer can also be completely interrupted, as a result of which the security thread loses not only its reflective property but also its mechanically verifiable electrical conductivity over the entire thread length.
Des weiteren ist der Aufbau meist asymmetrisch und diese Asymmetrie führt zur Rollneigung des Fadens und zur Girlandenbildung. Der Faden läßt sich damit nicht problemlos in stets gleicher Planlage in die Faserschicht einer sich formierenden Papierlage einbetten. Die Bereiche der Papierbahn, in denen der Sicherheitsfaden nicht in der Ebene der Papierlage zu liegen kommt, müssen anschließend als unbrauchbar ausgesondert werden. Durch diesen Ausschuß kommt es zu einer Verteuerung der Papierherstellung.Furthermore, the structure is usually asymmetrical and this asymmetry leads to the curl of the thread and the formation of garlands. The thread can therefore not be embedded in the fiber layer of a forming paper layer in a consistently flat position. The areas of the paper web in which the security thread does not come to lie in the plane of the paper layer must then be separated out as unusable. This committee increases the cost of paper production.
Schließlich sind Fabrikationsfehler im Beschichtungsvorgang nicht auszuschließen. So kann es z. B. zu starken Schichtdickenschwankungen und auch zu vollständigen Unterbrechungen in der Beschichtung kommen. Derartige Unterbrechungen in einer z. B. metallischen Schicht führen aber zur Unterbrechung der elektrischen Leitfähigkeit. Auch diese Sicherheitsdokumente müssen vorab als Ausschuß ausgesondert werden, da aufgrund dieser Unregelmäßigkeiten die Echtheitsfeststellung nicht mehr eindeutig ist.Finally, manufacturing errors in the coating process cannot be ruled out. So it can e.g. B. come to strong fluctuations in layer thickness and also complete interruptions in the coating. Such interruptions in a z. B. metallic layer lead to interruption of the electrical conductivity. These security documents must also be discarded in advance as a committee, since due to these irregularities the authenticity check is no longer clear.
Der Erfindung liegt nun die Aufgabe zugrunde, ein Sicherheitselement zu schaffen, das unter Vermeidung der o.g. Nachteile in einfacher Weise herstellbar und in ein Sicherheitsdokument einbettbar ist.The invention is based on the object of creating a security element which, while avoiding the above-mentioned. Disadvantages can be easily produced and embedded in a security document.
Diese Aufgabe wird durch die im kennzeichnenden Teil des Hauptanspruchs gegebenen Merkmale gelöst. Ein Verfahren zur Herstellung derartiger Sicherheitselemente ist Gegenstand eines nebengeordneten Anspruchs.This object is achieved by the features given in the characterizing part of the main claim. A method for producing such security elements is the subject of a subordinate claim.
Durch die erfindungsgemäße Zusammensetzung des Sicherheitsfadens aus zwei in gleicher Weise vorbehandelten Folien erhält der Faden einen vollkommen symmetrischen Aufbau. Vorzugsweise werden die beiden Trägerfolien aus der gleichen Folie gewonnen, in dem zunächst eine größere Folienbahn bereitgestellt, in einer Beschichtungsanlage mit den entsprechenden Beschichtungen versehen wird, die Folienbahn dann in zwei Längsbahnen geschnitten wird und diese Längsbahnen in der erfindungsgemäßen Form überlagert und miteinander verbunden werden. Damit werden auch Schwankungen vermieden, die aufgrund der Fertigung der Folienbahnen in zwei unterschiedlichen Produktionsabläufen entstehen könnten.The composition of the security thread according to the invention from two foils pretreated in the same way gives the thread a completely symmetrical structure. The two carrier films are preferably obtained from the same film, in which a larger film web is first provided, the corresponding coatings are provided in a coating system, the film web is then cut into two longitudinal webs and these longitudinal webs are overlaid and connected to one another in the form according to the invention. This also avoids fluctuations that could arise due to the production of the film webs in two different production processes.
Der Sicherheitsfaden, der bei der Papierherstellung von einer Rolle abgezogen und an vorbestimmter Stelle in der Pulpe zum Papiersieb geführt wird, hält seine Lage über diesen Weg, in dem er frei geführt wird, ein, ohne sich um seine Längsachse zu drehen. Der Ausschuß, der bei Fäden mit asymmetrischen Aufbau aufgrund mangelnder Planlage des Fadens in der Papierebene entsteht, kann dadurch vermieden werden.The security thread, which is pulled off a roll during paper production and is guided to the paper screen at a predetermined position in the pulp, maintains its position via this path in which it is guided freely, without rotating about its longitudinal axis. The reject which arises in the case of threads with an asymmetrical structure due to the flatness of the thread being flat in the paper plane can thereby be avoided.
Durch die Verlagerung der empfindlichen Schichten in die inneren Bereiche des Sicherheitsfadens können nun auch Materialien Verwendung finden, die beim Stand der Technik wegen ihrer exponierten Lage und der mangelnden Umweltbeständigkeit praktisch nicht benutzt werden können.By shifting the sensitive layers into the inner areas of the security thread, materials can now also be used that are used in the prior art because of their exposed position and the lack of them Environmental resistance can practically not be used.
Zudem ist jede eine Markierungssubstanz enthaltende Schicht doppelt vorhanden. Das Fehlen einer Markierungssubstanz in einer Schicht führt - falls nicht der unwahrscheinliche Fall auftritt, daß an der gleichen Stelle in der Gegenschicht auch die Substanz fehlt - nicht zum totalen Ausfall des Echtsheitsmerkmals. In diesem Fall ist die Substanzmenge zwar nur halb so groß, diese Reduzierung der Menge kann aber durch entsprechende Auslegung der Nachweisapparatur problemlos kompensiert werden.In addition, each layer containing a marking substance is present twice. The absence of a marking substance in one layer does not lead to a total loss of the authenticity feature, unless the unlikely event occurs that the substance is also missing at the same point in the counter-layer. In this case, the amount of substance is only half as large, but this reduction in the amount can easily be compensated for by appropriate design of the detection apparatus.
Die beiden Trägerfolien werden in der Regel über eine Klebeschicht miteinander verbunden, wobei je nach den Gegebenheiten geeignete Kleber auszuwählen sind. Sind z. B. die beiden innen liegenden Schichten Metallschichten und soll der Echtheitsnachweis über die Prüfung der elektrischen Leitfähigkeit erfolgen, so wird vorzugsweise ein Klebematerial verwendet, das mit elektrisch leitfähigen Pigmenten durchsetzt ist. Durch diese elektrisch leitfähigen Pigmente werden die beiden Metallschichten miteinander elektrisch verbunden. Sollte es bei der Herstellung der Folie oder bei der Einbettung des Sicherheitsfadens in das Papier zu einem Bruch in der Metallschicht kommen, so dient die Klebeschicht als Überbrückungsglied zur Aufrechterhaltung der elektrischen Verbindung über die gesamte Länge des Sicherheitselements.The two carrier foils are generally connected to one another by means of an adhesive layer, suitable adhesives being selected depending on the circumstances. Are z. B. the two inner layers of metal layers and if the authenticity is to be verified by checking the electrical conductivity, an adhesive material is preferably used which is permeated with electrically conductive pigments. The two metal layers are electrically connected to one another by these electrically conductive pigments. If there is a break in the metal layer during the production of the film or when the security thread is embedded in the paper, the adhesive layer serves as a bridging element to maintain the electrical connection over the entire length of the security element.
Während eine Magnetschicht als abriebgefährdete Schicht vorzugsweise nach innen verlagert wird, können widerstandsfähige Beschichtungen, wie z. B. eine Lackschicht oder eine Farbschicht, auch auf der Außenseite der Kunststoffschicht aufgebracht werden, zudem sich Kunststoffoberflächen in der Regel besser bedrucken lassen als z. B. metallische Oberflächen.While a magnetic layer as an abrasion-sensitive layer is preferably shifted inwards, resistant coatings, such as, for. B. a layer of paint or a layer of paint, can also be applied to the outside of the plastic layer, in addition, plastic surfaces can usually be printed better than z. B. metallic surfaces.
Die innenliegenden Beschichtungen können entsprechend dünn ausgeführt werden, da sie nun durch die äußeren Kunststoffolien gegen mechanische Belastungen ausreichend geschützt sind.The internal coatings can be made thin, since they are now adequately protected against mechanical loads by the outer plastic films.
In einer bevorzugten Ausführungsform wird bei der Herstellung der Trägerfolien zunächst die metallische Schicht aufgebracht und erst auf diese metallische Schicht die Magnetschicht. Die metallisch reflektierende Schicht deckt damit nach der Übereinanderlage der beiden Folien die Magnetschicht, die eine schwarze oder braune Eigenfarbe aufweist, ab. Dieser Faden kann dann auch im Druckbildbereich des Sicherheitsdokumentes eingelagert werden, da der Faden wegen seiner reflektierenden Oberfläche im Auflicht nicht bzw. nur als schwach hell erscheinender Bereich erkennbar ist und damit den visuellen Eindruck des Druckbilds nicht stört. Erst bei Betrachtung im Durchlicht ist dieser Faden als dunkler Streifen im Papier erkennbar. Diese Unterschiede in der Auf- und Durchlichtbetrachtung sind auch ein einfaches Mittel, um das Dokument von einer Kopie unterscheiden zu können.In a preferred embodiment, the metallic layer is first applied during the production of the carrier foils and the magnetic layer is only applied to this metallic layer. After the two foils have been superimposed, the metallic reflective layer thus covers the magnetic layer, which has a black or brown intrinsic color. This thread can then also be stored in the print image area of the security document, since the thread cannot be recognized or can only be recognized as a faintly bright area due to its reflecting surface in incident light and thus does not disturb the visual impression of the print image. Only when viewed in transmitted light can this thread be recognized as a dark streak in the paper. These differences in reflected and transmitted light viewing are also a simple way to distinguish the document from a copy.
Die Sicherheitsfäden können aber auch nach an sich bekannten Verfahren so in das Dokument eingelagert werden, daß sie stellenweise an der Oberfläche erscheinen. Gerade hier zeigt sich ein besonderer Vorteil der Erfindung. Durch die stellenweise exponierte Lage des Sicherheitsfadens an der Dokumentenoberfläche ist er gerade hier durch den täglichen Gebrauch besonderen mechanischen Belastungen ausgesetzt. Beim erfindungsgemäßen Sicherheitsfaden bilden aber nun gegen mechanische und chemische Einflüsse widerstandsfähige Kunststoffschichten, wie z. B. Polyesterfolien, die Außenschichten, die die empfindlichen Merkmalsschichten schützen. Der Faden zeigt also trotz seiner exponierten Lage keine Abnutzungserscheinungen.However, the security threads can also be embedded in the document by methods known per se so that they appear on the surface in places. This is a particular advantage of the invention. Due to the exposed position of the security thread on the document surface, it is exposed to special mechanical loads due to daily use. In the security thread according to the invention, however, plastic layers which are resistant to mechanical and chemical influences, such as, for. B. polyester films, the outer layers that protect the sensitive feature layers. In spite of its exposed position, the thread shows no signs of wear.
Das doppelte Vorhandensein einer Markierungssubstanz kann im Falle der metallischen bzw. elektrisch leitfähigen Beschichtung vorteilhaft zur Echtheitsprüfung genutzt werden.The double presence of a marking substance can advantageously be used for the authenticity check in the case of the metallic or electrically conductive coating.
Bei den bekannten Sicherheitsfäden, die nur eine elektrisch leitfähige Schicht enthalten, führen Risse in der Metallbeschichtung dazu, daß die Leitfähigkeit unterbrochen wird. Der berührungslose Nachweis der Leitfähigkeit mittels bekannter Verfahren (DE-PS 17 74 290) führte daher zu einem negativen Ergebnis. Bei der erfindungsgemäßen Lösung sind nun zwei leitfähige Schichten vorhangen, die durch eine nicht leitfähige Schicht (Kunststofffolie, Klebeschicht etc.), ein Dielektrikum bildend, kapazitiv gekoppelt. Treten nun in den Metallschichten Risse auf, so wirken die durch diese Risse unterbrochenen Metallschichten mit dem Dielektrikum dazwischen, wie hintereinander geschaltete Kondensatoren. Dadurch wird eine Wechselstromleitfähigkeit aufrecht erhalten, wenn man davon ausgehen kann, daß nicht an gleicher Stelle des Fadens beide Metallschichten völlig unterbrochen sind. Mißt man nun diese Wechselstromleitfähigkeit über an sich bekannte kapazitive Meßverfahren (siehe z.B. EP-A-0 105 969), so kann selbst bei einem oder mehreren Brüchen in ein oder beiden Metallbeschichtungen auf das Vorhandensein zweier elektrisch leitfähiger Schichten geschlossen werden und dieses zur Echtheitserkennung dienende Merkmal eindeutig festgestellt werden.In the known security threads, which contain only an electrically conductive layer, cracks in the metal coating lead to the conductivity being interrupted. The non-contact detection of conductivity using known methods (DE-PS 17 74 290) therefore led to a negative result. In the solution according to the invention, two conductive layers are now capacitively coupled, which are capacitively coupled by a non-conductive layer (plastic film, adhesive layer, etc.), forming a dielectric. If cracks now appear in the metal layers, the metal layers interrupted by these cracks with the dielectric in between act like capacitors connected in series. This maintains an alternating current conductivity if it can be assumed that both metal layers are not completely interrupted at the same point on the thread. If one measures this AC conductivity by means of capacitive measuring methods known per se (see, for example, EP-A-0 105 969), then even in the event of one or more breaks in one or both metal coatings, it can be concluded that two electrically conductive layers are present and this is used for authenticity detection Feature can be clearly determined.
Weitere Vorteile und vorteilhafte Weiterbildungen ergeben sich aus der Beschreibung bevorzugter Ausführungsformen der Erfindung anhand der Figuren.Further advantages and advantageous developments result from the description of preferred embodiments of the invention with reference to the figures.
Die Fig. zeigen:
- Fig. 1 und 2
- Querschnittsansichten zu verschiedenen Ausführungsformen erfindungsgemäßer Sicherheitselemente,
- Fig. 3
- eine schematische Darstellung zum Herstellungsverfahren.
- 1 and 2
- Cross-sectional views of various embodiments of security elements according to the invention,
- Fig. 3
- a schematic representation of the manufacturing process.
Die Fig. 1 zeigt eine einfache Ausführungsform eines erfindungsgemäßen Sicherheitsfadens 1. Die Trägerfolien sind die beiden außenliegenden, transparenten Kunststofffolien 2, 3 aus vorzugsweise Polyester. Jede dieser Kunststoffolien ist auf ihrer inneren Seite mit einer Metallbeschichtung 4, 5 versehen. Hierzu werden die Folien mittels geeigneter Beschichtungsverfahren (Bedampfen, Sprühen, Sputtern etc.) mit einer Aluminium-, Nickel- oder auch Chromschicht beschichtet. Die Schichtdicke liegt hier in der Regel weit unter 1 µ. Verbunden werden diese beiden Trägerfolien nach ihrer Beschichtung über eine Klebstoffschicht 6. Geeignete Kleber sind z. B. Laminierkleber, die durch Erwärmung über einen bestimmten Temperaturbereich aktiviert werden oder auch Polimerisationskleber, die bei Erwärmung und/oder UV-Bestrahlung aushärten.1 shows a simple embodiment of a security thread 1 according to the invention. The carrier films are the two outer, transparent
Dieser Faden hat durch seine metallische Beschichtung stark reflektierende Eigenschaften und ist damit nur im Durchlicht als dunkler Streifen erkennbar, da bei Betrachtung im Auflicht das vom Faden reflektierte Licht durch die darüberliegende Papierschicht gestreut wird. Durch die äußeren Polyesterfolien ist der Faden gegen eine Vielzahl von chemischen Lösungsmitteln resistent und erfüllt auch aufgrund der hervorragenden mechanischen Eigenschaften von Polyester die geforderten Bedingungen, wie hohe Flexibilität und Reißfestigkeit.Due to its metallic coating, this thread has highly reflective properties and is therefore only recognizable as a dark stripe in transmitted light, since when viewed in incident light, the light reflected by the thread is scattered through the paper layer above it. The outer polyester film makes the thread resistant to a large number of chemical solvents and also fulfills the required conditions such as high flexibility and tear resistance due to the excellent mechanical properties of polyester.
Die Fig. 2 zeigt einen Faden, in dem - wiederum zwischen zwei Polyesterfolien 8, 9 - die der Echtheitserkennung dienenden Schichtmaterialien eingelagert sind. Jede dieser Folien wurde hier zunächst mit einer metallischen Beschichtung 10, 11 versehen und auf diese metallische Beschichtung ist eine Magnetschicht 12, 13 aufgebracht. Geeignete Magnetmaterialien bzw. Beschichtungsmaterialien sind aus der DE-PS 16 69 245 bekannt. Auch hier werden beide Trägerfolien mit ihrer beschichteten Seite nach innen gerichtet überlagert und mit Hilfe einer Klebeschicht 14 miteinander verbunden. Die Klebeschicht ist auf eine gute Verbindung der hier innenliegenden Magnetschichten abzustimmen.2 shows a thread in which - again between two
In manchen Fällen, insbesondere, wenn mehrere Schichten im Sicherheitsfaden enthalten sein sollen, können die Folien auch beidseitig beschichtet werden. In diesem Fall kommt dann zumindest eines der Schichtmaterialien nach außen zu liegen. Für diese außenliegenden Schichten 15 sind daher Materialien zu wählen, die den chemischen und mechanischen Belastungen standhalten. Dabei kann es sich z. B. um eine ganzflächige Lackbeschichtung handeln, die eine bestimmte Farbe oder auch lumineszierende Eigenschaften besitzt. Es können aber auch partiell ein Muster oder auch alphanumerische Schriftzeichen aufgedruckt werden, die direkt oder unter Zuhilfenahme entsprechender Vergrößerungsgeräte lesbar sind. Da die Fäden in der Regel eine Breite von 0,5 mm bis max. 1,5 mm aufweisen, sind für die Bedruckung des Fadens mit Zeichen dieser Größenordnung aufwendige Drucktechniken und entsprechende Vorrichtungen notwendig, wodurch der Faden zusätzlich an Fälschungssicherheit gewinnt.In some cases, especially if several layers are to be contained in the security thread, the films can also be coated on both sides. In this case, at least one of the layer materials then comes to the outside. Materials that withstand the chemical and mechanical loads must therefore be selected for these
Die beiden Trägerfolien, aus denen sich der erfindungsgemäße Sicherheitsfaden zusammensetzt, wird vorzugsweise aus einer einzigen Folie gewonnen, die vorab ein- oder beidseitig mit den gewünschten Schichten versehen wird. Die Folienseite, die die später innen liegenden Beschichtungen trägt, wird zusätzlich mit einer Klebstoffläche versehen. Durch Falten der Folie oder Zerschneiden und entsprechende Überlagerung der beiden Bahnhälften wird die gewünschte doppellagige Folienbahn erstellt. Zur festen Verbindung der beiden Folien können diese durch eine an sich bekannte Rollenkaschieranlage gefüllt werden (Fig. 3). In dieser Anlage werden die Folien 2, 3 mit der z. B. metallischen Beschichtung 4, 5 einander zugewandt überlagert und über Heizrollen 22, Infrarot oder Hochfrequenz, auf eine Temperatur gebracht, bei der der Kleber 6 aktiviert wird. Nach dem Durchgang durch zwei Preßwalzen 23 und anschließender Abkühlung sind die beiden Folien fest miteinander verbunden und können in einer entsprechenden Schneideanlage in einzelne Streifen mit der gewünschten Breite geschnitten werden.The two carrier films from which the security thread according to the invention is composed are preferably obtained from a single film which is provided with the desired layers on one or both sides in advance. The side of the film that carries the later internal coatings is additionally provided with an adhesive surface. By folding the film or cutting and appropriate superimposition of the two web halves created the desired double-layer film. For a firm connection of the two foils, these can be filled by a roller laminating system known per se (FIG. 3). In this system, the
Claims (16)
- A security document in which a security element in the form of a thread or strip is embedded, comprising a carrier sheet and at least one marking substance applied thereto, e.g. in the form of a coating, to allow for visual and/or machine detection of authenticity, characterized in that
the security element (1) is composed of two carrier sheets (2, 3, 8, 9),
each marking substance (4, 5, 10, 11, 12, 13, 15) allowing for detection of authenticity is found on each of these carrier sheets and is thus present twice,
these carrier sheets are interconnected in such a way that the total structure is symmetric when regarded in cross section, and
the carrier sheets enclose at least one pair (4 and 5, 10 and 11, 12 and 13) of the marking substances each present twice. - The security document of claim 1, characterized in that the enclosed pair of one marking substance (4, 5, 10, 11) is a metal coating.
- The security document of claim 1, characterized in that the enclosed pair of one marking substance (12, 13) is a magnetic coating.
- The security document of claims 2 and 3, characterized in that the metal coating pair (10, 11) covers the magnetic coating pair (12, 13) on the outside on both sides.
- The security document of any of claims 1 to 4, characterized in that the two carrier sheets (2, 3, 8, 9) are interconnected by an adhesive layer (6, 14).
- The security document of claim 5, characterized in that the adhesive layer (6) contains electrically conductive pigments.
- The security document of any of claims 1 to 6, characterized in that the carrier sheets (2, 3, 8, 9) are provided or printed on the outside with a layer of varnish or paint (15) resistant to environmental influences.
- The security document of claim 7, characterized in that the layers of varnish or paint (15) possess at least partly luminescent properties.
- A security element in the form of a thread or strip to be embedded in a security document, comprising a carrier sheet and at least one marking substance applied thereto, e.g. in the form of a coating, to allow for visual and/or machine detection of authenticity, characterized in that
the security element (1) is composed of two carrier sheets (2, 3, 8, 9),
each marking substance (4, 5, 10, 11, 12, 13, 15) allowing for detection of authenticity is found on each of these carrier sheets and is thus present twice,
these carrier sheets are interconnected in such a way that the total structure is symmetric when regarded in cross section, and
the carrier sheets enclose at least one pair (4 and 5, 10 and 11, 12 and 13) of the marking substances each present twice. - A method for producing a security document in which a security element in the form of a thread or strip is embedded, comprising a carrier sheet and at least one marking substance applied thereto to allow for visual and/or machine detection of authenticity, a plastic sheet being prepared and this plastic sheet provided with the substance allowing for detection of authenticity, characterized by the steps of
producing a second, similarly pretreated sheet,
providing at least one of the sheets with a laminating adhesive on the side provided with marking substance,
superimposing the two sheets with their sides provided with marking substance or with the adhesive layer facing each other, and gluing them together,
cutting the security elements out of this two ply stretch of sheet in the necessary strip or thread width, and
embedding this security element in the security document. - The method of claim 10, characterized in that the two plastic sheets are obtained from one stretch of sheet.
- The method of claim 11, characterized in that this stretch of sheet is cut into two longitudinal strips after application of the marking substances to form the two plastic sheets.
- The method of any of claims 10 to 12, characterized in that the plastic sheets are coated several times with different materials.
- The method of claim 13, characterized in that the various coatings are applied to the same side of the sheet.
- A method for producing a security element in the form of a thread or strip to be embedded in a security document, comprising a carrier sheet and at least one marking substance applied thereto to allow for visual and/or machine detection of authenticity, a plastic sheet being prepared and this plastic sheet provided with the substance allowing for detection of authenticity, characterized by the steps of
producing a second, similarly pretreated sheet,
providing at least one of the sheets with an adhesive on a side provided with marking substance,
superimposing the two sheets with their sides provided with marking substance or with the adhesive layer facing each other, and gluing them together, and
cutting the security elements out of this two ply stretch of sheet in the necessary strip or thread width. - A method for testing the security documents of one or more of claims 1 to 8, characterized in that the A.C. conductivity of the security element is tested by capacitive measurement to detect the presence of the electrically conductive coatings.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3843077A DE3843077A1 (en) | 1988-12-21 | 1988-12-21 | SECURITY ELEMENT IN THE FORM OF STRINGS OR TAPES FOR EMBEDDING IN SECURITY DOCUMENTS, AND METHODS FOR THE PRODUCTION AND TESTING THEREOF |
| DE3843077 | 1988-12-21 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0374763A2 EP0374763A2 (en) | 1990-06-27 |
| EP0374763A3 EP0374763A3 (en) | 1990-12-05 |
| EP0374763B1 true EP0374763B1 (en) | 1994-06-01 |
Family
ID=6369748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP89123254A Expired - Lifetime EP0374763B1 (en) | 1988-12-21 | 1989-12-15 | Security elements in the form of threads or strips to be embedded in security documents, and method of producing and testing same |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US5324079A (en) |
| EP (1) | EP0374763B1 (en) |
| AT (1) | ATE106323T1 (en) |
| DE (2) | DE3843077A1 (en) |
| ES (1) | ES2054998T3 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1101203B2 (en) † | 1998-07-27 | 2009-06-24 | Infineon Technologies AG | Security paper, method and device for checking the authenticity of documents recorded thereon |
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| DE3915638B4 (en) * | 1989-05-12 | 2006-06-08 | Giesecke & Devrient Gmbh | Security document with embedded security element with visually and machine-checkable tags and security element for a security document |
| DE4041025C2 (en) * | 1990-12-20 | 2003-04-17 | Gao Ges Automation Org | Magnetic, metallic security thread with negative writing |
| US5509691A (en) * | 1992-10-26 | 1996-04-23 | Gao Gesellschaft Fur Automation Und Organisation Mbh | Security element in the form of threads or strips to be embedded in security documents and a method for producing and testing the same |
| US5393099A (en) * | 1993-05-21 | 1995-02-28 | American Bank Note Holographics, Inc. | Anti-counterfeiting laminated currency and method of making the same |
| US5601931A (en) * | 1993-12-02 | 1997-02-11 | Nhk Spring Company, Ltd. | Object to be checked for authenticity and a method for manufacturing the same |
| DE4344552A1 (en) * | 1993-12-24 | 1995-06-29 | Giesecke & Devrient Gmbh | Method and device for equipping securities with authenticity features |
| DE4405860B4 (en) * | 1994-02-23 | 2006-11-23 | WHD elektronische Prüftechnik GmbH | Measuring arrangement for evaluating a metal thread |
| US5944927A (en) * | 1997-05-29 | 1999-08-31 | The Standard Register Company | Security paper having an embedded security thread and a process for making the security paper |
| US5961152A (en) * | 1997-05-29 | 1999-10-05 | The Standard Register Company | Security paper having an embedded and deformed security thread and a process for making the security paper |
| DE19819571A1 (en) * | 1998-04-30 | 1999-11-04 | Giesecke & Devrient Gmbh | Security document with security element |
| GB2338678B (en) * | 1998-06-25 | 2000-05-17 | Rue De Int Ltd | Improvements in security documents and substrates therefor |
| GB2338680B (en) * | 1998-06-25 | 2000-05-17 | Rue De Int Ltd | Improvementd in security documents and subtrates therefor |
| LU90424B1 (en) * | 1999-07-30 | 2006-06-08 | Cabinet Erman S A R L | Manufacturing process of security markers and safety markers |
| GB2375078A (en) * | 2001-04-30 | 2002-11-06 | Rue De Int Ltd | Security substrate with indicia only viewable in transmitted light |
| DE10131153A1 (en) | 2001-06-28 | 2003-01-16 | Giesecke & Devrient Gmbh | security element |
| KR100448999B1 (en) * | 2001-12-31 | 2004-09-16 | 한국조폐공사 | Process for Preparing Security Paper with Windowed Thread Incorporated on Both Sides Thereof |
| DE10218897A1 (en) | 2002-04-26 | 2003-11-06 | Giesecke & Devrient Gmbh | Security element and process for its manufacture |
| EP1529653A1 (en) * | 2003-11-07 | 2005-05-11 | Sicpa Holding S.A. | Security document, method for producing a security document and the use of a security document |
| ES2264372B1 (en) * | 2005-03-10 | 2007-12-01 | Fabrica Nacional De Moneda Y Timbre - Real Casa De La Moneda | SAFETY STRIP, SECURITY PAPER THAT INCLUDES SUCH STRIP AND SECURITY DOCUMENT AND TICKET THAT INCORPORATE SUCH PAPER. |
| AR080431A1 (en) | 2010-03-03 | 2012-04-11 | Sicpa Holding Sa | SECURITY THREAD OR STRIP THAT INCLUDES MAGNETIC PARTICULES ORIENTED IN INK AND PROCEDURE AND MEANS TO PRODUCE THE SAME |
| DE102010035889B4 (en) * | 2010-08-30 | 2021-11-11 | Bundesdruckerei Gmbh | Value and / or security document and process for its production |
| EP2882597B1 (en) | 2012-08-01 | 2017-02-01 | Sicpa Holding SA | Optically variable security threads and stripes |
| WO2014032238A1 (en) | 2012-08-29 | 2014-03-06 | Sicpa Holding Sa | Optically variable security threads and stripes |
| JP2016522528A (en) | 2013-05-02 | 2016-07-28 | シクパ ホルディング ソシエテ アノニムＳｉｃｐａ Ｈｏｌｄｉｎｇ Ｓａ | Manufacturing method of security thread or stripe |
| CN105793058B (en) | 2013-12-11 | 2018-07-10 | 锡克拜控股有限公司 | Safety line or item and its manufacturing method and purposes, secure file and its manufacturing method |
| WO2015121028A1 (en) | 2014-02-13 | 2015-08-20 | Sicpa Holding Sa | Security threads and stripes |
| PL2965920T3 (en) | 2014-07-09 | 2018-03-30 | Sicpa Holding Sa | Optically variable magnetic security threads and stripes |
| DE102014011383A1 (en) | 2014-08-01 | 2016-02-04 | Giesecke & Devrient Gmbh | Security element, value document substrate, security paper, value document and method for producing the same and Trensferband |
| WO2019138878A1 (en) * | 2018-01-11 | 2019-07-18 | 三菱電機株式会社 | Capacitance detection device and image reading device |
| US12296391B2 (en) | 2019-01-29 | 2025-05-13 | Basf Se | Security element |
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| GB1095286A (en) * | 1963-07-08 | 1967-12-13 | Portals Ltd | Security device for use in security papers |
| GB1127043A (en) * | 1967-01-26 | 1968-09-11 | Portals Ltd | Security papers |
| GB1585533A (en) * | 1976-12-07 | 1981-03-04 | Portals Ltd | Security papers |
| DE2925273C2 (en) * | 1979-06-22 | 1981-09-17 | GAO Gesellschaft für Automation und Organisation mbH, 8000 München | Security with a security thread |
| DE3122470C2 (en) * | 1981-06-05 | 1985-09-05 | GAO Gesellschaft für Automation und Organisation mbH, 8000 München | Security paper and process for making the same |
| US4420509A (en) * | 1981-08-11 | 1983-12-13 | Glasteel Tennessee, Inc. | Copper-clad polyester-glass fiber laminates |
| US4446173A (en) * | 1981-08-11 | 1984-05-01 | Glasteel Tennessee, Inc. | Copper-clad polyester-glass fiber laminates using zinc-coated copper |
| EP0105969A1 (en) * | 1982-10-20 | 1984-04-25 | Coulter Systems Corporation | Encoded security document |
| DE3446861A1 (en) * | 1984-12-21 | 1986-07-10 | GAO Gesellschaft für Automation und Organisation mbH, 8000 München | SECURITY DOCUMENT WITH THE SECURITY THREAD STORED IN IT AND METHOD FOR THE PRODUCTION AND AUTHENTICITY TESTING OF THE SECURITY DOCUMENT |
| EP0303725B1 (en) * | 1987-08-19 | 1992-06-17 | GAO Gesellschaft für Automation und Organisation mbH | Security paper |
| DE3843075C2 (en) * | 1988-12-21 | 2003-08-14 | Gao Ges Automation Org | Security document with an electrically conductive security element embedded in it |
-
1988
- 1988-12-21 DE DE3843077A patent/DE3843077A1/en not_active Ceased
-
1989
- 1989-12-15 DE DE58907775T patent/DE58907775D1/en not_active Expired - Fee Related
- 1989-12-15 ES ES89123254T patent/ES2054998T3/en not_active Expired - Lifetime
- 1989-12-15 EP EP89123254A patent/EP0374763B1/en not_active Expired - Lifetime
- 1989-12-15 AT AT89123254T patent/ATE106323T1/en not_active IP Right Cessation
-
1992
- 1992-10-26 US US07/966,546 patent/US5324079A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1101203B2 (en) † | 1998-07-27 | 2009-06-24 | Infineon Technologies AG | Security paper, method and device for checking the authenticity of documents recorded thereon |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3843077A1 (en) | 1990-06-28 |
| ES2054998T3 (en) | 1994-08-16 |
| US5324079A (en) | 1994-06-28 |
| EP0374763A3 (en) | 1990-12-05 |
| ATE106323T1 (en) | 1994-06-15 |
| EP0374763A2 (en) | 1990-06-27 |
| DE58907775D1 (en) | 1994-07-07 |
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