JPH0330909B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic card that cannot be tampered with and is formed by forming a barcode pattern that cannot be tampered with on a cash card of a bank or the like.

2. Description of the Related Art Generally, bank cards and the like use magnetic cards on which information is recorded using a magnetic recording method.

Magnetic cards using a magnetic recording method are suitable for use as cash cards because the recorded contents cannot be seen from the outside, but they can be easily erased by applying a magnetic field to the recorded signals, and once erased, ,
This has become a major social problem, with magnetic heads being used illegally by recording (or falsifying) new false signals.

In this regard, in the barcode recording method, since the barcode is formed with black paint or the like, it is impossible to erase or rerecord. However, the barcode pattern detects the recorded information content by reflecting light, and has the disadvantage that the recorded content is exposed by the light and dark striped pattern of the barcode. However, it was not used in cases where the contents of records should be kept secret.

However, even with the barcode recording method, it has been possible to modify an existing barcode pattern made of ferromagnetic material into a pattern that uses ferromagnetic material. This can be easily determined from the fact that there are products that use magnetic tape (made of ferromagnetic material) that can be repeatedly erased and recorded as a magnetic material.

The present invention has been made in view of the above circumstances, and provides a magnetic card that cannot be tampered with and has a barcode pattern formed of a soft magnetic material on the magnetic card as an information carrier. A barcode pattern is provided at a predetermined position on the main body using a soft magnetic material with a coercive force of 10 oersted or less, and the barcode pattern is encoded with desired information and can be read by applying an external magnetic field, and the barcode pattern is further coated with a non-magnetic material. It is a magnetic card that cannot be tampered with.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In FIGS. 1 and 2, 1 is a card body made of, for example, white opaque hard vinyl chloride. At a predetermined position of the card body 1, soft iron powder is dispersed in an organic solvent together with an organic binder. A barcode pattern 2 encoding desired information is printed using magnetic paint. The barcode pattern 2 is printed on the surface of the card body 1 and has an uneven appearance, so a filler 4 (FIG. 4) made of a magnetic substance is embedded in the recesses of the barcode pattern 2 to form the pattern. The entire surface is flat.

Further, the oversheet 3 is formed of a non-magnetic material, for example, an organic bonding material film, and a non-magnetic pigment is added to make the barcode pattern 2 printed on the card body 1 visually indistinguishable. If this is done, the recorded contents can be hidden by covering the barcode pattern 2 (see Figures 3 and 2).
figure). Further, the oversheet 3 is applied to a portion of the barcode pattern 2 printed on the card body 1 or to the entire card body 1. If the oversheet 3 is applied by printing with a non-magnetic base material and formed by drying, the filler material 4 can be omitted.

As shown in FIG. 4, since the barcode pattern 2 is made of a magnetic core material having a low coercive force of 10 oersted or less and a high magnetic flux density, such as soft iron, a permanent magnet is placed on the opposite side of the magnetic head 6 to the card body 1. By arranging a magnetic flux generating means (magnetizing means) such as 7, etc., the barcode pattern 2 exhibiting magnetization can be read by the magnetic head 6.

As explained in detail below, the magnetic card according to the present invention has a barcode pattern formed of a soft magnetic material with a coercive force of 10 oersted or less on a card body made of a non-magnetic material as an information carrier. The barcode pattern is covered with an oversheet made of non-magnetic material and an organic bonding material film that makes it impossible to identify the barcode pattern on the outside, and the card must be destroyed in order to falsify the information. There is no risk of unauthorized use. That is, since the barcode pattern formed from the magnetic material of the present invention is composed of a soft magnetic material, the pattern cannot be read by means such as magnetic development, and the barcode pattern cannot be read by means such as magnetic development. Even though I can't even recognize that it's a magnetic card,
During actual use, its presence can be detected magnetically as shown in FIG. 5, so that the content is not exposed by bright and dark stripes compared to conventional bar codes.

Furthermore, in the present invention, even if the stripes of a barcode are covered with a non-magnetic material to make it impossible to distinguish the stripes from the outside, the stripes themselves are made of a soft magnetic material, so the brightness of the stripes is magnetic. Since it has been replaced with the presence or absence of , it is possible to read the Naimen.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a magnetic card having a soft magnetic barcode pattern, Fig. 2 is a sectional view of the main part of Fig. 1, Fig. 3 is a plan view of a magnetic card that cannot be tampered with according to the present invention, and Fig. 4 is a sectional view of FIG. 3, and FIG. 5 is a schematic sectional view illustrating a method of reading the contents of a magnetic card according to the present invention. 1... Card body, 2... Barcode pattern, 3
…Oversheet.

Claims (1)

[Scope of Claims] 1. A barcode pattern is provided at a predetermined position on the card body using a soft magnetic material with a coercive force of 10 oersted or less, and the barcode pattern is encoded with desired information and can be read by applying an external magnetic field. A magnetic card that cannot be tampered with and is coated with a non-magnetic material. 2. The tamper-proof magnetic card according to claim 1, wherein the barcode pattern is coated so that it cannot be identified visually.