JP2891422B2 - Magnetic card - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to a magnetic card such as a magnetic ticket, a magnetic commuter pass, a magnetic coupon, and a magnetic sheet, and more particularly to a magnetic card capable of significantly improving the forgery prevention effect. It is about.

[Prior Art] Conventionally, in magnetic cards such as magnetic tickets, magnetic commuter passes, magnetic coupons, and magnetic sheets, a magnetic paint is directly coated on a card-like substrate such as PET or paper, or a magnetic paint is applied. By transferring the transfer foil, a magnetic recording layer having a constant width is provided in a predetermined direction. In this case, the magnetic recording layer is required to have physical and chemical properties such as durability, friction resistance, heat resistance, chemical resistance, and solvent resistance in addition to the required magnetostatic properties and electromagnetic conversion properties. You. In general, a protective layer is usually provided on the magnetic recording layer.

On the other hand, recently, there is an increasing tendency that the hue of the magnetic recording layer is hidden and the appearance as if it is not a magnetic card is required in design. In this case, as a method of concealing the magnetic recording layer of the magnetic card, a method of concealing the magnetic recording layer by providing a metal deposition layer on the entire surface of the card, or concealing the magnetic recording layer by applying silver ink is used. Methods and the like have been adopted.

In recent years, for the purpose of preventing forgery of a card, a pattern layer is provided on a magnetic recording layer using a magnetic ink and a normal ink so as to form a desired pattern (for example, a bar code or the like) by printing. Things have been proposed. In a magnetic card of this type, when a magnetic field is applied to the barcode portion, the magnetic field returns to the barcode formed with magnetic ink, so that only the barcode formed with this magnetic ink can be read with a magnetic head. Can be. In this case, the patterns of the amount of money and the issuing institution are recorded in the magnetic ink pattern.

[Problems to be Solved by the Invention] However, in a magnetic card provided with a pattern layer using such a magnetic ink and a normal ink, if the pattern of either the magnetic ink or the normal ink is known, the recorded information is also changed. There is a problem that it is immediately understood and is not preferable from the viewpoint of forgery prevention.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has as its object to provide a magnetic card that can completely hide a pattern layer and can significantly enhance the forgery prevention effect.

Means for Solving the Problems In order to achieve the above object, according to the present invention, a magnetic recording layer provided on a card-like substrate, and a plurality of types of magnetic inks having different magnetic properties are provided on the magnetic recording layer. Is provided so as to form a desired pattern by printing using a pattern layer that constitutes information on the authenticity of the card, and a pattern of each magnetic ink is provided on the pattern layer and the magnetic recording layer, And a concealing layer for concealing.

[Operation] Therefore, in the magnetic card of the present invention, a plurality of types of magnetic inks having different magnetic properties are used, and a signal of only each pattern, a signal of magnetic ink, and a plurality of types of signals are selectively used. Accordingly, it is not easy to determine which magnetic ink is used. As a result, the recorded information is not known, and the forgery prevention effect can be significantly improved.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a sectional view showing a configuration example of a magnetic card according to the present invention, and FIG. 2 is a plan view in FIG. As shown in FIG. 1, the magnetic card of this embodiment has a card-like
A desired pattern is formed by printing using a magnetic recording layer 2 provided on a base 1 and two types of magnetic inks having different magnetic properties that are small in residual magnetic flux and invisible with a mag mirror on the magnetic recording layer 2. Pattern layer 3 provided to
1, 32, a concealing layer 4 provided on the pattern layers 31, 32 and the magnetic recording layer 2 and concealing the magnetic recording layer 2 and the pattern layers 31, 32, and a protective layer 5 provided on the concealing layer 4. It consists of.

Here, as the substrate 1, for example, PET (polyester), PVC, paper (coated paper, high quality paper) or the like is used. The magnetic recording layer 2 is formed by, for example, directly coating a magnetic paint. In this case, as the composition of the magnetic paint,
Consideration is given to the adhesiveness to the substrate 1 and the flexibility, abrasion resistance, chemical resistance and the like when a coating film is formed. In the magnetic recording layer 2, information is read / written from / to a portion where the pattern layers 31 and 32 are not formed. Further, the pattern layer 31 is made of a magnetic ink (for example, barium ferrite or the like as a magnetic powder) having a magnetic characteristic as shown in FIG. 3 (a characteristic in which the output level is saturated when the bias current of the magnetic head is increased). ) Is formed by screen printing. Pattern layer 32
A screen is made of a magnetic ink (for example, carbonyl iron or the like as a magnetic powder) having magnetic characteristics (a characteristic in which a bias current of a magnetic head and an output level increase in proportion) as shown in FIG. Print and form.

On the other hand, the concealing layer 4 is formed by depositing a metal such as Al, for example, and conceals the magnetic recording layer 2 and the pattern layers 31 and 32 so that they cannot be visually discriminated. In addition, the protective layer 5
Has a role of protecting the concealing layer 4 mainly composed of, for example, a transparent vinyl resin.

In the magnetic card having such a configuration, the pattern layers 31 and 32
Is read by the following method. That is, at the bias current value A of the magnetic head, the patterns of the pattern layers 31 and 32 are read together. Further, in the bias current value B of the magnetic head,
Magnetic ink for forming the pattern layers 31 and 32,
By utilizing the difference in the output level of the magnetic ink, only one of the patterns is read. Here, when a magnetic card is issued by each of Company A and Company B, the pattern layer 31 is printed with magnetic ink on a dedicated magnetic card used by Company A, and a magnetic layer is printed on the dedicated magnetic card used by Company B. Print the pattern layer 32 with ink. In addition, the present embodiment is applied to a magnetic card shared by Company A and Company B, and the pattern layer 31 is printed with magnetic ink and the pattern layer is printed with magnetic ink.
By printing 32, a magnetic card that can be used by both companies A and B is obtained. In addition, the exclusive magnetic cards of the companies A and B have only the pattern of the pattern layer 31 made of magnetic ink and the pattern of the pattern layer 32 made of magnetic ink.
Cannot be used outside of the company. Further, in the magnetic recording layer 2, information is read from a portion without the pattern layers 31 and 32 via the magnetic head, and after a predetermined process is executed based on the information, updated information is written as appropriate.

As described above, the magnetic card according to the present embodiment uses the two types of magnetic inks having different magnetic properties on the magnetic recording layer 2 provided on the card-shaped substrate 1 by screen printing to obtain a desired pattern. To form a pattern layer
31, and a concealing layer 4 for concealing the pattern layers 31, 32 and the magnetic recording layer 2 is provided on the pattern layers 31, 32 and the magnetic recording layer 2.

Accordingly, two types of magnetic inks having different magnetic properties are used, and a signal of only each pattern, a signal of the magnetic ink, and two types of signals are selectively used.
It is not easy to know which magnetic ink is used. As a result, the recorded information is not known, and the forgery prevention effect can be significantly improved. Also, 1
Three magnetic cards can have three types of pattern information. That is, pattern information of only magnetic ink, pattern information of only magnetic ink, and pattern information of magnetic ink can be provided.
Furthermore, since the concealing layer 4 is provided on the pattern layers 31, 32 and the magnetic recording layer 2, it is possible to completely conceal the pattern layers 31, 32 and the magnetic recording layer 2.

In the above embodiment, the case where the pattern layer is formed using two types of magnetic inks has been described. However, the present invention is not limited to this, and the pattern layer may be formed using three or more types of magnetic inks. Good.

In the above embodiment, the protective layer 5 may be omitted.

[Effects of the Invention] As described above, according to the present invention, each magnetic ink is printed on a magnetic recording layer provided on a card-shaped substrate by using a plurality of types of magnetic inks having different magnetic properties. A pattern layer is provided so that the pattern forms a desired pattern that constitutes information on the authenticity of the card,
Further, since the concealing layer for concealing the pattern layer is provided on the pattern layer and the magnetic recording layer, a magnetic card capable of completely concealing the pattern layer and significantly improving the forgery prevention effect can be provided.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a magnetic card according to the present invention, FIG. 2 is a plan view of the embodiment, and FIG. 3 is a view showing an example of magnetic properties of a magnetic ink used in the embodiment. . DESCRIPTION OF SYMBOLS 1 ... Substrate, 2 ... Magnetic recording layer, 31, 32 ... Pattern layer, 4 ... Hiding layer, 5 ... Protective layer.

Claims (1)

(57) [Claims] A magnetic recording layer provided on a card-like substrate; and a magnetic recording layer provided on the magnetic recording layer so as to form a desired pattern by printing using a plurality of types of magnetic inks having different magnetic properties. A pattern layer comprising a plurality of types of information relating to the authenticity of the card; and a concealing layer provided on the pattern layer and the magnetic recording layer to conceal the pattern layer. A magnetic card, wherein a pattern formed by each of the inks forms each of the plurality of types of information.