DE2842972A1 - CARD-MADE CURRENCY - Google Patents

CARD-MADE CURRENCY

Info

Publication number
DE2842972A1
DE2842972A1 DE19782842972 DE2842972A DE2842972A1 DE 2842972 A1 DE2842972 A1 DE 2842972A1 DE 19782842972 DE19782842972 DE 19782842972 DE 2842972 A DE2842972 A DE 2842972A DE 2842972 A1 DE2842972 A1 DE 2842972A1
Authority
DE
Germany
Prior art keywords
payment
thermochromic material
value
protective layer
card
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.)
Granted
Application number
DE19782842972
Other languages
German (de)
Other versions
DE2842972B2 (en
DE2842972C3 (en
Inventor
David Leslie Dr Greenaway
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.)
Landis and Gyr AG
Original Assignee
Landis and Gyr AG
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
Application filed by Landis and Gyr AG filed Critical Landis and Gyr AG
Publication of DE2842972A1 publication Critical patent/DE2842972A1/en
Publication of DE2842972B2 publication Critical patent/DE2842972B2/en
Application granted granted Critical
Publication of DE2842972C3 publication Critical patent/DE2842972C3/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/328—Diffraction gratings; Holograms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/405—Marking
    • B42D25/425—Marking by deformation, e.g. embossing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/45—Associating two or more layers
    • B42D25/455—Associating two or more layers using heat
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/30—Payment architectures, schemes or protocols characterised by the use of specific devices or networks
    • G06Q20/34—Payment architectures, schemes or protocols characterised by the use of specific devices or networks using cards, e.g. integrated circuit [IC] cards or magnetic cards
    • G06Q20/343—Cards including a counter
    • G06Q20/3433—Cards including a counter the counter having monetary units
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F7/00—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
    • G07F7/02—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by keys or other credit registering devices
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F7/00—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
    • G07F7/08—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means
    • G07F7/086—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means by passive credit-cards adapted therefor, e.g. constructive particularities to avoid counterfeiting, e.g. by inclusion of a physical or chemical security-layer
    • B42D2033/32—
    • B42D2035/02—
    • B42D2035/34—

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Business, Economics & Management (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Computer Security & Cryptography (AREA)
  • Accounting & Taxation (AREA)
  • Strategic Management (AREA)
  • General Business, Economics & Management (AREA)
  • Theoretical Computer Science (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)
  • Credit Cards Or The Like (AREA)

Abstract

The means of payment has optical markings (6) which are arranged between two protective layers (2, 3) impermeable to visible light and which can be cancelled by the supply of thermal energy. To make the remaining value of the means of payment or the number of used value units visible, at least part of the surface of the means of payment has a thermochromic material. One protective layer (2) can be coated with a covering layer (5) consisting of thermochromic material or can itself contain thermochromic material. A value scale can be printed onto the means of payment. <IMAGE>

Description

Kartenförmiges ZahlungsmittelCard-shaped means of payment

Kartenförmiges Zahlungsmittel Es ist ein kartenförmiges Zahlungsmittel der im Oberbegriff des Anspruchs 1 genannten Art bekannt (CH-PS 574 144), bei dem eine Vielzahl von optischen Markierungen in einen thermoplastischen Aufzeichnungsträger eingeprägt sind. Jede dieser optischen Markierungen, die Hologramme, Beugungsgitter, Kinoforms, Fresnellinsen u.dgl. sein können, stellt eine vorbestimmte Werteinheit dar.Card-shaped means of payment It is a card-shaped means of payment of the type mentioned in the preamble of claim 1 known (CH-PS 574 144), in which a plurality of optical markings in a thermoplastic recording medium are impressed. Each of these optical markings, the holograms, diffraction gratings, Kinoforms, Fresnel lenses and the like represent a predetermined unit of value represent.

Der Aufzeichnungsträger ist zwischen zwei Schutzschichten eingebettet, die aus Sicherheitsgründen für sichtbares Licht undurchlässig, für z.B. infrarotes Licht dagegen durchlässig sind, so dass die optischen Markierungen nicht sichtbar sind, in einem Lese- und Entwertegerät mit Hilfe von z.B. infrarotem Licht aber abgetastet und auf Echtheit geprüft werden können. Das Zahlung mittel dient zum bargeldlosen Bezug von Waren oder Dienstleistungen. Hierzu wird beim Gebrauch des Zahlungsmittels im Lese- und Entwertegeröt eine dem zu bezahlenden Betrag entsprechende Anzahl optischer Markierungen entwertet, indem diese durch Zufuhr thermischer Energie ausgelöscht oder zumindest derart verändert werden, dass sie ihre ursprünglichen charakteristischen optischen Eigenschaften weitgehend verlieren. Die Oberfläche der Schutzschichten wird bei der schrittweisen Entwertung des Zahlungsmit tels kaum oder nur sehr schwach verändert, so dass der Benützer des Zahlungsmittels nicht erkennen kann, wie viele der optischen Markierungen schon entwertet worden sind bzw. welchen Restwert das Zahlungsmittel noch aufweist.The recording medium is embedded between two protective layers, which for security reasons are impermeable to visible light, e.g. infrared Light, however, are permeable, so that the optical markings are not visible are, however, in a reading and validation device with the help of e.g. infrared light can be scanned and checked for authenticity. The payment medium is used for cashless purchase of goods or services. To do this, when using the The means of payment in the reading and validation device corresponds to the amount to be paid Number of optical markings devalued by adding thermal energy to them wiped out or at least changed in such a way that they are their original ones largely lose characteristic optical properties. The surface the protective layers hardly become with the gradual devaluation of the means of payment or changed only very slightly, so that the user of the means of payment does not can see how many of the optical markings have already been canceled or what residual value the means of payment still has.

Der im Anspruch 1 angegebenen Erfindung liegt die Aufgabe zugrunde, ein Zahlungsmittel zu schaffen, dessen Restwert auf einen Blick erkennbar ist.The invention specified in claim 1 is based on the object To create a means of payment whose residual value can be seen at a glance.

Nachfolgend werden Ausführungsbeispiele der Erfindung anhand der Zeichnung näher erläutert.Exemplary embodiments of the invention are described below with reference to the drawing explained in more detail.

Es zeigen: Fig. 1 ein Zahlungsmittel, Fig. 2 das Zahlungsmittel nach der Fig. 1 in stark vergrösserter Schnittdarstellung und Fig. 3 ein weiteres Zahlungsmittel.1 shows a means of payment, FIG. 2 shows the means of payment according to FIG 1 in a greatly enlarged sectional view, and FIG. 3 shows another means of payment.

Das kartenförmige Zahlungsmittel. nach den Fig. 1 und 2 besteht aus einem transparenten thermoplostischen Aufzeichnungsträger 1, einer oberen -Schutzschicht 2, einer unteren Schutzschicht 3, einer zwischen der Schutzschicht 2 und dem Aufzeichnungsträger 1 angeordneten dünnen Reflexionsschicht 4 aus Metall rund einer Deckschicht 5, welche die Schutzschicht 2 mindestens teilweise bedeckt. Der Aufzeichnungsträger 1 enthält eine Vielzahl von optischen Markierungen 6, von denen jede eine Werteinheit darstellt und aus einem Hologramm, Beugungsgitter, Kinoform u.dgl. bestehen kann. Im Beispiel der Fig. 2 ist eine dieser optischen Markierungen 6 als Phasenbeugungsgitter dargestellt. Vorzugsweise werden die Markierungen 6 vor dem Auftragen der Schutzschicht 2 im Aufzeichnungstrger 1 durch Prägen erzeugt. Die Schutzschicht 2 ist lichtundurchlässig und die Schutzschicht 3 für z.B. infrarotes Licht durchlässig, für sichtbares Licht dagegen ebenfalls undurchlässig.The card-shaped means of payment. according to FIGS. 1 and 2 consists of a transparent thermoplastic recording medium 1, an upper protective layer 2, a lower protective layer 3, one between the protective layer 2 and the recording medium 1 arranged thin reflective layer 4 made of metal around a cover layer 5, which the protective layer 2 at least partially covers. The recording medium 1 contains a plurality of optical markings 6, each of which represents a unit of value and can consist of a hologram, diffraction grating, kinoform and the like. For example FIG. 2 shows one of these optical markings 6 as a phase diffraction grating. The markings 6 are preferably in the Recording medium 1 generated by embossing. The protective layer 2 is opaque and the protective layer 3 is transparent to, for example, infrared light and visible light on the other hand also impermeable.

Die Deckschicht 5 besteht aus thermochromem Material (auch thermographisches Material genannt)1 was gestattet, durch örtlich begrenzte Zufuhr thermischer Energie in ausgewählten Bereichen der Deckschicht eine irreversible Farbänderung hervorzurufen. Solche thermochromenMaterialen sind bekannt und werden daher hier nicht näher beschrieben. Die Dicke der Deckschicht 5 kann in der Grössenordnung von 5 bis 40 Mikron liegen.The cover layer 5 consists of thermochromic material (also thermographic Material called) 1 what allows, by locally limited supply of thermal energy to cause an irreversible color change in selected areas of the top layer. Such thermochromic materials are known and are therefore not further described here. The thickness of the cover layer 5 can be in the order of magnitude of 5 to 40 microns.

Auf die Deckschicht 5 ist eine Wertskala 7 aufgedruckt. Diese besteht im dargestellten Beispiel aus vierzig in einer Reihe angeordneten, fortlaufend numerierten Rechtecken 8. Jedes der Rechtecke 8 liegt deckungsgleich über einer der optischen Markierungen 6 des Aufzeichnungsträgers 1.A value scale 7 is printed on the cover layer 5. This exists In the example shown, forty arranged in a row and numbered consecutively Rectangles 8. Each of the rectangles 8 is congruent over one of the optical ones Markings 6 of the recording medium 1.

Zur Bezahlung einer Ware oder Dienstleistung führt der Benützer das beschriebene Zahlungsmittel in ein Lese- und Entwertegerät ein, wo mit Hilfe von die Schutzschicht 3 durchdringenden Lesestrahlen selbsttätig geprüft wird, ob das Zahlungsmittel eine ausreichende Anzahl gültiger optischer Markierungen 6 enthält.To pay for a product or service, the user carries out this described means of payment in a reader and validator, where with the help of the protective layer 3 penetrating reading beams is automatically checked whether the Means of payment contains a sufficient number of valid optical markings 6.

Sodann wird durch örtlich begrenzte Zufuhr thermischer Energie mit Hilfe eines auf der Seite der Deckschicht 5 angeordneten thermischen Löschkopfes eine dem zu bezahlenden Betrag entsptechende Anzahl optischer Markierungen 6 entwertet. Die Schutzschicht 2 wird durch den Entwertevorgang kaum oder nur sehr schwer erkennbar verändert, dagegen ändert sich die Farbe der Deckschicht 5 in den den ausgelöschten Markierungen 6 entsprechenden Bereichen, so dass an der Wertskala 7 auf einen Blick erkennbar ist, wie viele Werteinheiten schon verbraucht worden sind bzw. welchen Restwert das Zahlungsmittel noch besitzt.Thereafter, thermal energy is added with a localized supply With the aid of a thermal erase head arranged on the side of the cover layer 5 a number of optical markings 6 corresponding to the amount to be paid is canceled. The protective layer 2 is hardly or only with great difficulty recognizable by the devaluation process changed, on the other hand, the color of the cover layer 5 changes to the extinguished one Markings 6 corresponding areas, so that on the value scale 7 at a glance it can be seen how many value units have already been used or which ones Remaining value still has the means of payment.

Eine vorteilhafte Variante des beschriebenen Zahlungsmittels besteht darin, eine Schutzschicht 2 vorzusehen, die selber thermochromes Material enthält, so dass keine gesonderte Deckschicht 5 erforderlich ist. Dies ermöglicht, bei der Herstellung des Zchlungsmittels im selben Arbeitsgang sowohl eine Schicht zum mechanischen und visuellen Schutz der optischen Markierungen 6 als auch das thermochrome Material zur Sichtbarmachung des Restwertes des Zahlungsmittels aufzutragen.There is an advantageous variant of the means of payment described in providing a protective layer 2 which itself contains thermochromic material, so that no separate cover layer 5 is required. This enables Production of the stimulant in the same operation, both a layer and a mechanical one and visual protection of the optical markings 6 as well as the thermochromic material to make the residual value of the payment method visible.

Die Fig. 3 zeigt ein kartenförmiges Zahlungsmittel, bei dem die durch eine Schraffur angedeutete Deckschicht 5 nur in einem ausserhalb der optischen Markierungen 6 liegenden Teilbereich der Fläche des Zahlungsmittels auf die Schutzschicht 2 aufgetragen ist. Zur Sichtbarmachung des Restwertes dieses Zahlungsmittels ist im Lese- und Entwertegerät ein gesonderter thermischer Aufzeichnungskopf vorzusehen, der synchron mit dem zur Entwertung der Markierungen 6 erforderlichen thermischen Löschkopf betrieben werden kann. Der Vorteil des Zahlungsmittels nach der Fig. 3 liegt darin, dass die graphische Darstellung des Restwertes bzw.Fig. 3 shows a card-shaped means of payment, in which the through cover layer 5 indicated by hatching only in one outside of the optical markings 6 lying partial area of the surface of the means of payment is applied to the protective layer 2 is. To visualize the residual value of this means of payment is in the reading and To provide a separate thermal recording head validator, the synchronous operated with the thermal erase head required to cancel the markings 6 can be. The advantage of the means of payment according to FIG. 3 is that the graphic representation of the residual value or

der verbrauchten Werteinheiten auf dem Zahlungsmittel in beliebiger Weise erfolgen kann und nicht durch die geometrische Anordnung der Markierungen 6 eingeschränkt ist. Hingegen ist zum Betrieb des gesonderten Aufzeichnungskopfes zusätzliche Energie erforderlich, während beim Zahlungsmittel nach der Fig. 1 die thermographische Aufzeichnung mit Hilfe des ohnehin erforderlichen Löschkopfes erfolgt.of the used value units on the means of payment in any way can take place and not restricted by the geometric arrangement of the markings 6 is. On the other hand, there is additional energy to operate the separate recording head required, while with the means of payment according to FIG. 1, the thermographic recording takes place with the help of the already necessary erase head.

Claims (4)

PATEN TAN SPRUECHE 1. Kartenförmiges Zahlungsmittel mit optischen Markierungen, die Werteinheiten darstellen, zwischen zwei für sichtbares Licht undurchlässigen Schutzschichten angeordnet und zur schrittweisen Entwertung des Zahlungsmittels durch Zufuhr thermischer Energie ati1oschbar oder veränderbur sind, dadurch gekennzeichnet, dass mindestens ein Teil der Fläche des Zahlungsmittels ein thermochromes Material aufweist.PATEN TAN SPRAUECHE 1. Card-shaped means of payment with optical Marks representing units of value between two opaque to visible light Protective layers arranged and for the gradual devaluation of the means of payment can be adjusted or changed by the supply of thermal energy, characterized in that that at least part of the surface of the currency is a thermochromic material having. 2. Zatlungsmittel nach Anspruch 1, dadurch gekennzeichnet, dass die-sine Schutzschicht (2) mindestens teilweise mit einer aus dem thenmnchrornen Material bestehenden Deckschicht (5) beschichtet ist.2. Zatlungsmittel according to claim 1, characterized in that the-sine Protective layer (2) at least partially with one of the thenmnchrornen material existing top layer (5) is coated. 3. Zahlungsmittel nach Anspruch 1, dadurch gekennzeichnet, dass die eine Schutzschicht (2) thermochromes Material enthält 3. Payment means according to claim 1, characterized in that the a protective layer (2) contains thermochromic material 4. Zahlungsmittel nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass auf die das thermochrome Material aufweisende Fläche eine Wertskala (7) aufgedruckt ist.4. Means of payment after a of claims 1 to 3, characterized in that the thermochromic material having a value scale (7) is printed on the surface.
DE2842972A 1978-09-06 1978-10-02 Card-shaped means of payment that can be canceled gradually Expired DE2842972C3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH936178A CH635949A5 (en) 1978-09-06 1978-09-06 Card-shaped means of payment

Publications (3)

Publication Number Publication Date
DE2842972A1 true DE2842972A1 (en) 1980-03-13
DE2842972B2 DE2842972B2 (en) 1980-06-19
DE2842972C3 DE2842972C3 (en) 1981-04-30

Family

ID=4351175

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2842972A Expired DE2842972C3 (en) 1978-09-06 1978-10-02 Card-shaped means of payment that can be canceled gradually

Country Status (2)

Country Link
CH (1) CH635949A5 (en)
DE (1) DE2842972C3 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0100747A2 (en) * 1982-08-02 1984-02-15 Prepaid Card Services, Inc. Optically-readable cards
EP0101968A2 (en) * 1982-08-24 1984-03-07 GAO Gesellschaft für Automation und Organisation mbH Identity card with marks which can be verified by incident or transmitted light, and method of manufacturing the same
EP0151706A2 (en) * 1984-01-03 1985-08-21 LGZ LANDIS &amp; GYR ZUG AG Optical diffraction security element
EP0612037A1 (en) * 1992-12-22 1994-08-24 N.V. Nederlandsche Apparatenfabriek NEDAP A reprogrammable electronic responder card with a visually readable information content
WO2000054985A1 (en) * 1999-03-12 2000-09-21 De La Rue International Limited In security elements
NL2031320A (en) * 2022-03-18 2023-09-21 Voerman Roelof A sealing mark, a package and methods

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3422911C1 (en) * 1984-06-20 1985-09-05 Leonhard Kurz GmbH & Co, 8510 Fürth Stamping foil, in particular hot stamping foil, with a magnetic layer
CH683384A5 (en) * 1991-08-12 1994-02-28 Landis & Gyr Business Support Identification card and method of manufacturing such identification cards.
KR100362350B1 (en) * 1994-03-16 2003-02-19 오브이디 키네그람 악티엔게젤샤프트 Optical carrier with optical label
DE19527737B4 (en) * 1994-08-05 2006-06-01 Ovd Kinegram Ag Arrangement with a reader and with an information memory with optical and magnetic features
DE19801589C2 (en) * 1998-01-17 2001-02-01 Bundesdruckerei Gmbh Process for the tamper-proof production of value and security documents

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1228972B (en) * 1959-06-06 1966-11-17 Dr Karlheinz Koenig Identification of authenticity of securities
DE2701176B1 (en) * 1976-12-21 1977-12-08 Landis & Gyr Ag Concealed identification code for credit cards etc. - is pressed in stress field and heated to reveal surface markings

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1228972B (en) * 1959-06-06 1966-11-17 Dr Karlheinz Koenig Identification of authenticity of securities
DE2701176B1 (en) * 1976-12-21 1977-12-08 Landis & Gyr Ag Concealed identification code for credit cards etc. - is pressed in stress field and heated to reveal surface markings

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0100747A2 (en) * 1982-08-02 1984-02-15 Prepaid Card Services, Inc. Optically-readable cards
EP0100747A3 (en) * 1982-08-02 1985-10-23 Teletoken 2000 Ltd. Optically-readable cards
EP0101968A3 (en) * 1982-08-24 1985-12-27 Gao Gesellschaft Fur Automation Und Organisation Mbh Identity card with marks which can be verified by incident or transmitted light, and method of manufacturing the same
EP0101968A2 (en) * 1982-08-24 1984-03-07 GAO Gesellschaft für Automation und Organisation mbH Identity card with marks which can be verified by incident or transmitted light, and method of manufacturing the same
US4711690A (en) * 1982-08-24 1987-12-08 Gao Gesellschaft Fur Automation Und Organisation Mbh Method for making an identification card having features for testing in incident and transmitted light
CH661368A5 (en) * 1984-01-03 1987-07-15 Landis & Gyr Ag Diffraction optical safety element.
EP0151706A3 (en) * 1984-01-03 1985-10-02 Lgz Landis & Gyr Zug Ag Optical diffraction security element
EP0151706A2 (en) * 1984-01-03 1985-08-21 LGZ LANDIS &amp; GYR ZUG AG Optical diffraction security element
EP0612037A1 (en) * 1992-12-22 1994-08-24 N.V. Nederlandsche Apparatenfabriek NEDAP A reprogrammable electronic responder card with a visually readable information content
WO2000054985A1 (en) * 1999-03-12 2000-09-21 De La Rue International Limited In security elements
AU755984B2 (en) * 1999-03-12 2003-01-02 De La Rue International Limited In security elements
US6616190B1 (en) 1999-03-12 2003-09-09 De La Rue International Limited Security elements
NL2031320A (en) * 2022-03-18 2023-09-21 Voerman Roelof A sealing mark, a package and methods
WO2023177297A1 (en) * 2022-03-18 2023-09-21 Roelof Voerman A sealing mark, a package and methods
NL2035811A (en) * 2022-03-18 2023-09-27 Voerman Roelof A sealing mark, a package and methods

Also Published As

Publication number Publication date
CH635949A5 (en) 1983-04-29
DE2842972B2 (en) 1980-06-19
DE2842972C3 (en) 1981-04-30

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