JP3375354B2 - Card and card authenticity judgment method - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a card and a method for judging the authenticity of the card. More specifically, the present invention relates to a card such as a credit card, a cash card, a prepaid card, and a card authenticity determination method capable of effectively preventing illegal use such as forgery and falsification. 2. Description of the Related Art In recent years, it has become common to pay for a payment using a credit card, cash card, prepaid card, or the like. As countermeasures to prevent forgery of these cards, magnetic recording, adhesion of hologram foil to cards, use of special ink, magnetic shielding, and the like have been implemented. More security than these conventional security measures
The demand for cards with enhanced tee effects has increased
I have. In use, it is necessary to determine whether the card and the card holder are valid. One way is to use the signature of the cardholder. As shown in FIG. 7, a sign panel base material 61 is provided as a sign section (sign panel part) at, for example, a substantially central portion of a card base 62, and the sign panel base material 61 is used by being signed by the owner. Things. The sign panel substrate 61 is adhered to the surface of the card base 62 by an adhesive layer 63. However, if the sign panel base material 61 is also peeled off from the card base 62 and another sign panel base material (having an improper signature) is attached to the position on the card base, the card holder is not valid. You can still use this card. In this case, since the authenticity and the signature of the sign panel are confirmed only by human eyes, there is no effective means for preventing the forgery at present. SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above-mentioned problems, and has been made in consideration of the above-mentioned problems, and a card and a card which can effectively prevent unauthorized use such as forgery or falsification. Provide a false judgment method. According to the first aspect of the present invention, there is provided a sign panel substrate bonded to a card substrate via an adhesive layer containing a magnetic fiber. A method for determining the authenticity of a card having a sign panel portion, wherein the sign panel portion and the magnetic head are moved relative to each other to scan, an output waveform is generated, and the output waveform is based on ID information held by a card base. This is a card authenticity judgment method characterized by judging the authenticity of the card by comparing it with a signal. According to the present invention, the authenticity of the card or the sign panel is determined by measuring the output waveform with the magnetic head on the sign panel of the card. Can be. That is, since the adhesive layer contains a magnetic fiber, the response output waveform differs for each card, and the signal is processed to determine the authenticity of the card. Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a sectional view showing a sign panel portion of a card according to an embodiment of the present invention. FIG. 2 is a plan view of a card according to one embodiment of the present invention. FIG. 3 is a sectional view of a card according to an embodiment of the present invention. FIG. 4 is a schematic diagram illustrating a card manufacturing apparatus according to one embodiment. FIG.
FIG. 1 is a schematic diagram showing a check device for checking the authenticity of a card according to one embodiment. FIG. 6 is a diagram showing a pattern of an output waveform according to one embodiment of the present invention. In FIG. 1, FIG. 2, and FIG. 3, reference numeral 10 denotes a credit card, for example.
It has a plastic card base 11 of 4 cm × 8.6 cm) with a predetermined thickness. A band-shaped sign panel base material 12 is adhered to a substantially central portion of the surface of the card base 11 by an adhesive layer 13 serving as an adhesive layer. As the sign panel base material 12, a paper base material is used which is easy to absorb and fix ink such as a fountain pen, a ballpoint pen, a sign pen, etc., easily adheres to the card base 11, and is easy to find counterfeiting and falsification. For example, high quality paper (Oji Paper 46-size)
45 kg) can be used as the sign panel base material 12. A magnetic stripe 14 for holding magnetic recording is also provided on a part of the surface of the card base 11 by bonding or the like. Further, the magnetic fiber 1 is provided in the adhesive layer 13.
5 are randomly distributed. For example, this adhesive layer 13
Magnetic fibers 15 are dispersed in a thermoplastic resin and adjusted as an adhesive so that the fibers are randomly distributed at a distribution density of 1 g / m ² therein. This magnetic fiber 15
Are Fe, Fe-Si, Fe-Al, F
e-Si-Al, Fe-Si-B, Fe-Ni, Fe-
Co, Fe-Ni-Co or Fe-Si binary system and Fe-N
i-based, Fe-As, Fe-S
n, Fe-P, etc., having a diameter of about 5 to 20 μm and a length of 3 to 5 mm. The adhesive layer 13 is made of polyester resin, acrylic resin, urethane resin, vinyl chloride resin, polyamide resin, polyvinyl acetate resin, rubber resin, ethylene-vinyl acetate copolymer resin, ethylene-acrylic acid copolymer resin,
Ethylene-acrylate copolymers, mixtures of these with tackifiers, and thermoplastic resins such as vinyl chloride-vinyl acetate copolymer resins can be used. An arbitrary resin is selected from these resins in consideration of the adhesiveness to the materials of the card base 11 and the sign panel base 12. The adhesive layer 13 is formed by applying these resins to a predetermined thickness on the back surface of the sign panel substrate 12 by a technique such as a gravure coating method, a roll coating method, a blade coating method, or an extrusion coating method. The thickness of the adhesive layer 13 is preferably 1 to 20 μm. The sign panel substrate 12 is a card substrate 1
1, for example, by using a thermocompression bonding method. FIG.
Shows a heating and pressing device for bonding the sign panel base material 12 to the card base body 11 by the thermocompression bonding method.
In this heating and pressurizing device, a pair of hot plates 31, 32, at least one of which is provided so as to be able to approach and separate from the other, is provided vertically separated. On the hot plate 32, a card base 11 and a sign panel base 12 arranged at a predetermined position on the card base 11 are mounted. And hot plate 3
1, 32, the card base 11 and the sign panel base 1
The sign panel substrate 12 is bonded to the card base 11 by heating and pressing the sheet 2. FIG. 5 shows the principle of operation of a magnetic reproducing apparatus for determining the authenticity of the card 10.
The card 10 shown by the two-dot chain line and the solid line in the figure
First, it is placed at a position shown by a two-dot chain line so as to be conveyed in the direction. Next, on the back side of the card 10, there is provided a conveying means including a rubber roller, a motor, and the like. By rotating in the direction of arrow C in the figure, the card 10 is moved from the position shown by the two-dot chain line in the figure Transported to the position. A magnetic fiber reading head 41 is fixed at the same position as the sign panel provided on the card 10. The amplitude of the output waveform after the card 10 has been conveyed from the two-dot chain line to the position indicated by the solid line indicates the presence of one or more magnetic fibers 15. Depending on the distribution of the magnetic fibers 15 contained in the adhesive layer 13, the output waveforms are, for example, four kinds of waveforms (A) to (A) shown in FIG.
(D) is shown. These output waveform patterns are obtained by combining magnetic fibers 15 having different distribution densities, thicknesses, and lengths. The signal of the output waveform of the magnetic fiber 15 is
Further, it is converted to a digital scan signal in a manner known to those skilled in the art. Using a digital scanning signal obtained when the card 10 is scanned by this system, an ID symbol having an ID function based on a cryptographic conversion coding formula can be used. This ID symbol is, for example, a readable print character,
The card 10 can be applied to the card 10 in the form of a bar code, a perforation, a programmed integrated circuit or a magnetic stripe readable by a magnetic read head. Thus, the authenticity of the card 10 and the sign panel can be determined with reference to the ID symbol given to the adhesive layer 13 and the code given to the card 10. Therefore, in order to determine the authenticity of the card 10, the card 10 is inserted into the detection unit of the check device. The magnetic output waveform is read by the magnetic fiber read head 41 of the sign panel of the card 10. At this time, the magnetic fibers 15 are distributed in the adhesive layer 13,
Since they are embedded, output waveforms as shown in FIGS. 6A to 6D are shown. Then, by comparing this waveform with a signal read from, for example, the magnetic stripe 14 of the card 10, the authenticity of the card 10 is determined. If they match, the card is valid. In this case, since a large number of magnetic fibers 15 are randomly distributed in the adhesive layer 13, the combination is almost infinite. Panel substrate 12
Are different from one another, and it is difficult to arrange the magnetic fibers 15 in the same arrangement even if an attempt is made to produce the exact same thing. In addition, the sign panel
Since the D function is added, the determination can be performed by a special detection device, and there is no possibility of causing a determination error such as confirmation by human eyes. As described above, even if the card base 11 is genuine, the use of a person other than the proper owner can be reliably excluded. According to the present invention, even if the sign panel substrate is peeled off from the card base and another (unauthorized) sign panel portion is attached thereto, the sign panel portion is not authenticated. Can be determined. This is because it is difficult to produce the same adhesive layer containing a magnetic fiber.
In addition, the adhesive layer can be provided with an ID function, and its authenticity can be accurately determined. [0021]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing a sign panel portion of a card according to one embodiment of the present invention. FIG. 2 is a plan view of a card according to one embodiment of the present invention. FIG. 3 is a sectional view of a card according to an embodiment of the present invention. FIG. 4 is a schematic diagram showing a heating and pressing device according to one embodiment of the present invention. FIG. 5 is a schematic diagram showing a check device for checking the authenticity of a card according to one embodiment of the present invention. FIG. 6 is a diagram showing a pattern of a magnetic output waveform according to one embodiment of the present invention. FIG. 7 is a sectional view showing a sign panel portion of a conventional card. [Description of Signs] 10 Card 11 Card base 12 Sign panel base 13 Adhesive layer 15 Magnetic fiber

──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. ⁷ identification code FI G11B 5/80 G06K 19/00 B (58) Field surveyed (Int. Cl. ⁷ , DB name) B42D 5/00-15 / 10 G06K 19/10 G11B 5/80

Claims (1)

(1) A method for judging the authenticity of a card having a sign panel portion in which a sign panel substrate is adhered to a card substrate via an adhesive layer containing a magnetic fiber, the method comprising: The sign panel and the magnetic head are moved relative to each other to scan, an output waveform is generated, and the authenticity of the card is determined by comparing the output waveform with an ID signal based on the ID information held by the card base. Characteristic judgment method of card.