FR2463475A1 - Magnetic track with varying physical properties - for use as bank cards etc. - Google Patents
Magnetic track with varying physical properties - for use as bank cards etc. Download PDFInfo
- Publication number
- FR2463475A1 FR2463475A1 FR7920659A FR7920659A FR2463475A1 FR 2463475 A1 FR2463475 A1 FR 2463475A1 FR 7920659 A FR7920659 A FR 7920659A FR 7920659 A FR7920659 A FR 7920659A FR 2463475 A1 FR2463475 A1 FR 2463475A1
- Authority
- FR
- France
- Prior art keywords
- track
- magnetic
- magnetic track
- photosensitive material
- radiation
- 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
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Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/06187—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with magnetically detectable marking
- G06K19/06196—Constructional details
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/72—Protective coatings, e.g. anti-static or antifriction
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Manufacturing Of Magnetic Record Carriers (AREA)
- Magnetic Record Carriers (AREA)
Abstract
Description
La présente invention concerne un procédé de réalisation d'une piste magnétique présentant des caractéristiques physiques variables le long de la piste. The present invention relates to a method of producing a magnetic track having variable physical characteristics along the track.
En effet, l'inconvénient majeur de l'enregistrement d'informations sur pistes magnétiques classiques, tel qu'utilisé dans les cartes magnétiques à usage bancaire et autres applications type cartes d'accès, est le risque d'altération de ces informations par la proximité d'un aimant. Tout effacement, mems partiel des informations rend impossible toute exploitation de ces cartes par le matériel de lecture habituel. Indeed, the major drawback of recording information on conventional magnetic tracks, as used in magnetic cards for banking use and other applications such as access cards, is the risk of alteration of this information by the near a magnet. Any erasure, partial mems of information makes it impossible any exploitation of these cards by the usual reading material.
L'invention consiste à realiser des modifications localisées des caractéristiques magnétiques de la piste réparties selon un code déterminé ; le marquage ainsi réalisé permet de sauvegarder des informations essentielles pour l'identification du porteur, la reconnaissance d'origine ou d'authenticité du titre lui-même. The invention consists in making localized modifications of the magnetic characteristics of the track distributed according to a determined code; the marking thus produced makes it possible to save essential information for the identification of the holder, the recognition of origin or authenticity of the title itself.
Il est bien connu de l'homme de l'art que le niveau du signal recueilli en sortie d'une tête de lecture magnétique est directement lié, entre autres, à la distance existant entre l'entrefer de la tête de lecture et le matériau magnétique proprement dit, et est également lié, pour chaque type de matériau à l'épaisseur de ce dernier. Les carac téristiques d'une piste magnétique selon les procédés actuels sont donc totalement dépendantes du matériau utilisé, de son épaisseur et de l'épaisseur de matiere non magnétique qui le recouvre. Le procédé, objet de l'invention, permet de faire varier les deux derniers paramètres cités et donc d'inscrire des informations qui seront insensibles à toute perturbation magnétique ultérieure. It is well known to those skilled in the art that the level of the signal collected at the output of a magnetic read head is directly linked, inter alia, to the distance existing between the air gap of the read head and the material. magnetic itself, and is also linked, for each type of material to the thickness of the latter. The characteristics of a magnetic strip according to current methods are therefore totally dependent on the material used, its thickness and the thickness of non-magnetic material which covers it. The method which is the subject of the invention makes it possible to vary the last two parameters mentioned and therefore to enter information which will be insensitive to any subsequent magnetic disturbance.
Le procédé est mis en oeuvre entre les opérations de dépôt des pistes magnétiques sur le support de base et la plastification finale au moyen d'un film de quelques microns d'épaisseur, assurant la protection et l'état de surface souhaité du produit fini. The method is implemented between the operations of depositing the magnetic tracks on the base support and the final plasticization by means of a film a few microns thick, ensuring the protection and desired surface condition of the finished product.
L"ln7ention a ainsi pour Objet un procédé de réalisation d'une piste magnétique présentant des caractéristiques physiques variables le long de la piste., p#r:#nt dIurL SuppOrt comportant an noirs une piste magnétique déposée de la manière habituelle, caractérisé par la suite des opérations suivantes a - on dépose sur la piste magnétique une couche d'un matériau photosensible, b - on expose la piste å un rayonnement correspondant à la sensibilité du matériau phokosensibleO à travers un masque comportant des zones opaques et d'autres transparentes audit rayonnement selon une répartition correspondant au code choisi pour la piste, c - on élimine les parties de ladite couche de matériau photosensible nmonatériau,
materiauss touchées par le rayonnement selon b, au moyen dtune solution appropriée audit/ d - on procède à l'incrustation dans la piste magnétique des parties dudit matériau non dissoutes par l'opération de développement sous c en soumettant la piste à l'action simultanée de la chaleur et d'une pression.The object of the invention is thus a method of producing a magnetic track having variable physical characteristics along the track., P # r: #nt dIurL SuppOrt comprising in black a magnetic track deposited in the usual manner, characterized by the following operations a - a layer of photosensitive material is deposited on the magnetic track, b - the track is exposed to radiation corresponding to the sensitivity of the phososensitive material O through a mask comprising opaque zones and other transparent said radiation according to a distribution corresponding to the code chosen for the track, c - the parts of said layer of non-material photosensitive material are eliminated,
material affected by the radiation according to b, by means of an appropriate solution for audit / d - the parts of said material not dissolved by the development operation under c are incrusted in the magnetic track by subjecting the track to simultaneous action heat and pressure.
L'invention sera mieux comprise à la lumière de la description, faite ci-après, d'un exemple non limitatif de réalisation de l'invention en référence au dessin annexé dans lequel
Les figures 1 à 6 représentent les différentes étapes du procédé selon l'invention.The invention will be better understood in the light of the description, given below, of a nonlimiting example of embodiment of the invention with reference to the appended drawing in which
Figures 1 to 6 show the different steps of the method according to the invention.
On part de l'ensemble représenté figure 1 constitué par un support 1 en chlorure de polyvinyl revêtu par thermoassemblage d'un film support 2 d'une piste magnétique 3. Cet ensemble est réalisé d'une manière connue comme on le fait par exemple pour une carte, type carte de crédit. We start from the assembly shown in FIG. 1 consisting of a support 1 made of polyvinyl chloride coated by thermoassembly of a support film 2 of a magnetic track 3. This assembly is produced in a known manner as is done for example for a card, such as a credit card.
On procède alors au dépôt, figure 2, d'une couche photosensible 4 tel que le produit commercialisé sous la référence "riston type 2 301 D" par la Société Dupont de Nemours et qui est un vernis polymérisable sous rayonnement ultraviolet. Cette couche est déposée sur la piste magnétique 3. We then proceed to deposit, Figure 2, a photosensitive layer 4 such as the product sold under the reference "riston type 2 301 D" by the Company Dupont de Nemours and which is a varnish polymerizable under ultraviolet radiation. This layer is deposited on the magnetic track 3.
Sur la figure 3 est représentée l'étape suivante consistant en une exposition à un rayonnement ultra-violet de la couche photosensible 4 à travers un masque 5 constitué par exemple par un film réalisé selon les techniques photographiques habituelles et comportant une pluralité de parties alternativement transparentes et opaques selon les informations à transférer. On réalise ensuite le traitement de cette couche LI dans un solvant approprié à ladite couche, en l'occurence, par exemple une solution de bicarbonate de sodium à 1%. Les parties non touchées par le rayonnement ultraviolet, demeurées solubles, sont éliminées par le solvant, alors que les parties qui ont été atteintes par le rayonnement, devenues irlsolubles, demeurent et forment saillie sur la piste constituant une pluralité de bâtonnets 6 (figure 4). In Figure 3 is shown the following step consisting of exposure to ultraviolet radiation of the photosensitive layer 4 through a mask 5 constituted for example by a film produced according to the usual photographic techniques and comprising a plurality of alternately transparent parts and opaque according to the information to be transferred. The treatment of this LI layer is then carried out in a solvent suitable for said layer, in this case, for example a 1% sodium bicarbonate solution. The parts not affected by the ultraviolet radiation, which remain soluble, are eliminated by the solvent, while the parts which have been affected by the radiation, which have become soluble, remain and protrude on the track constituting a plurality of rods 6 (FIG. 4). .
On réalise ensuite l'incrustation des bâtonnets 6 dans la piste 3 comme représentée figure 5, sous l'action simultanée d'une pression, 2 de 17 kg/cm par exemple et d'une température de 1200C par exemple. The sticks 6 are then encrusted in the track 3 as shown in FIG. 5, under the simultaneous action of a pressure, 2 of 17 kg / cm for example and a temperature of 1200C for example.
Cette opération permet à la fois de reconstituer un état de surface lisse et d'accroitre, aux endroits des bâtonnets, la profondeur de la piste magnétique dans le support. This operation makes it possible both to reconstitute a smooth surface state and to increase, at the locations of the sticks, the depth of the magnetic track in the support.
Sur la figure 6, on a montré l'étape consistant en l'application d'un film de protection 7 comme on le fait habituellement. Ce film peut être transparent ou opaque. FIG. 6 shows the step consisting in applying a protective film 7 as is usually done. This film can be transparent or opaque.
Les bâtonnets 6 ainsi réalisés confèrent à la piste magnétique des propriétés localement différentes indélébiles. Les marques correspondantes sont aisément décelables au moyen des techniques habituelles de lecture après saturation ou enregistrement d'un signal modulé de fréquence appropriée. A la relecture, on constate un niveau de signal restituant l'image du masque 5. The rods 6 thus produced confer locally indelible properties on the magnetic track. The corresponding marks can easily be detected by the usual techniques of reading after saturation or recording of a modulated signal of appropriate frequency. Upon re-reading, there is a signal level restoring the image of the mask 5.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7920659A FR2463475A1 (en) | 1979-08-14 | 1979-08-14 | Magnetic track with varying physical properties - for use as bank cards etc. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7920659A FR2463475A1 (en) | 1979-08-14 | 1979-08-14 | Magnetic track with varying physical properties - for use as bank cards etc. |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2463475A1 true FR2463475A1 (en) | 1981-02-20 |
FR2463475B1 FR2463475B1 (en) | 1983-08-26 |
Family
ID=9228840
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7920659A Granted FR2463475A1 (en) | 1979-08-14 | 1979-08-14 | Magnetic track with varying physical properties - for use as bank cards etc. |
Country Status (1)
Country | Link |
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FR (1) | FR2463475A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0167898A2 (en) * | 1984-07-05 | 1986-01-15 | Ascom Autelca Ag | Data carrier with a sequential data track and method for producing the same |
EP0188625A1 (en) * | 1984-07-18 | 1986-07-30 | Sony Corporation | Method of producing optical data recording medium |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1534535A (en) * | 1966-08-22 | 1968-07-26 | Honeywell Inc | Magnetic recording device with separate tracks and method of manufacture thereof |
FR2108335A5 (en) * | 1970-09-21 | 1972-05-19 | Staley Mfg Co A E | |
FR2191187A1 (en) * | 1971-06-28 | 1974-02-01 | Ibm |
-
1979
- 1979-08-14 FR FR7920659A patent/FR2463475A1/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1534535A (en) * | 1966-08-22 | 1968-07-26 | Honeywell Inc | Magnetic recording device with separate tracks and method of manufacture thereof |
FR2108335A5 (en) * | 1970-09-21 | 1972-05-19 | Staley Mfg Co A E | |
FR2191187A1 (en) * | 1971-06-28 | 1974-02-01 | Ibm |
Non-Patent Citations (2)
Title |
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EXBK/68 * |
EXBK/71 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0167898A2 (en) * | 1984-07-05 | 1986-01-15 | Ascom Autelca Ag | Data carrier with a sequential data track and method for producing the same |
EP0167898A3 (en) * | 1984-07-05 | 1988-09-21 | Ascom Autelca Ag | Data carrier with a sequential data track and method for producing the same |
EP0188625A1 (en) * | 1984-07-18 | 1986-07-30 | Sony Corporation | Method of producing optical data recording medium |
EP0188625A4 (en) * | 1984-07-18 | 1988-07-25 | Sony Corp | Method of producing optical data recording medium. |
Also Published As
Publication number | Publication date |
---|---|
FR2463475B1 (en) | 1983-08-26 |
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