JPH05104890A - Magnetic card - Google Patents

Abstract

PURPOSE:To prevent layers from being exposed at cutting planes so as to eliminate scattering of components in the layers by forming a protective film at least at the cutting plane of a card end face, in a magnetic card having a magnetic layer, a printing layer, and a protective layer formed on a PET base material. CONSTITUTION:In a magnetic card 11, a magnetic layer 13 for magnetic recording is formed with coating on a rear face of a PET base material 12. On the upper face thereof, a silver layer 14 is formed for concealing the magnetic record. On the upper face thereof, a printing layer 15 having notes and others printed thereon and a protective layer 16 on the surface thereof are formed. On the top surface of the PET base material 12, a printing layer 17 and a protective layer 18 are formed. Further, the PET base material 12 is punched into a card having a desired size. On the whole including at least 4 cutting planes 21-24 in the magnetic card 11, a protective film 19 is formed. Thus, the layers are prevented from being exposed at the cutting planes, so that scattering of components in the layers to the outside and intrusion of other components are prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a magnetic card in which a PET substrate is provided with a magnetic layer for recording information by magnetic coating.

[0002]

2. Description of the Related Art Conventionally, various magnetic cards have been used in which a magnetic layer is formed as a magnetic storage area by magnetic coating or the like on the surface of a card-shaped polyethylene terephthalate (hereinafter referred to as PET) substrate. As such a magnetic card, for example, a telephone card that can make a public phone call within the range of a prepaid amount, a ticket issuing card that can issue a ticket within the range of a prepaid amount, etc. It is commonly known as a prepaid card.

FIG. 4 is a diagram showing a partial cross section of a conventional magnetic card. In the figure, a magnetic card 1 uses a PET base material 2 based on PET as a plastic material as a card medium, and a magnetic layer 3 for recording information on the back surface side (upper surface side in FIG. 4) thereof. , A silver layer 4 for concealing the magnetic recording, a printing layer 5 on which precautionary notes and the like are printed, and a protective layer 6 for protecting the printing are sequentially formed, and the same printing is performed on the front surface side (lower surface side in FIG. 4). Layer 7,
The protective layer 8 is formed. The magnetic card 1 having such a structure is formed, for example, by printing on a sheet-shaped material coated with a magnetic layer on the back side using a printing machine to form a protective layer, and finally by a punching die to obtain a desired size. It is manufactured by punching into the shape of a card.

[0004]

Since the conventional magnetic card 1 is manufactured by punching into a card shape in the die-cutting process, each layer is exposed at the cut surface as if it was cut with a sharp blade. In such a magnetic card 1, when it comes into contact with the conveyance path roller of the reader / writer device or the read / write magnetic head, the components of each layer of the exposed cut surface may become dust or the like and be scattered to the outside. .. In particular,
The magnetic layer 1 contains iron as a component, and if the dust adheres to the read / write magnetic head, the output may be reduced and the read / write may be adversely affected. Further, the dust containing the components of each layer may cause a transport slip. Further, the magnetic layer 1 is apt to be oxidized by containing the iron component, so that there is a possibility that corrosion may enter the inside from the exposed cut surface of the magnetic layer 1 or components of other layers may enter. It was

It is therefore an object of the present invention to provide a magnetic card in which the components of each layer are prevented from scattering from the cut surface of the end face of the magnetic card and the invasion of other components or the invasion of corrosion is prevented.

[0006]

In order to achieve the above object, the magnetic card of the present invention is a magnetic card having a magnetic layer for recording information, a printing layer and a protective layer formed on a PET substrate, at least the card. A protective film is formed on the cut surface of the end face.

[0007]

According to the present invention, since the protective film is formed on the cut surface of the end face of the magnetic card on which each layer is formed on the PET substrate, each layer is not exposed at the cut surface, and the components of each layer are not exposed. Is prevented from being scattered to the outside, and the penetration of the components of other layers or the penetration of corrosion is prevented.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to an embodiment shown in the drawings. FIG. 1 is a diagram showing a partial cross section of a magnetic card according to an embodiment of the present invention, and FIG. 2 is a perspective view of the magnetic card according to an embodiment of the present invention.

In these figures, the magnetic card 11 of this embodiment has a suitable strength and rigidity as a card medium, is hard to bend, and is strong against water, humidity, heat, etc. and has a thickness of, for example, The PET base material 12 having a thickness of about 0.188 mm to 0.25 mm is used. This PET substrate 12
The magnetic layer 13 for magnetic recording is formed on the back surface (upper surface in FIG. 1) of the coating by coating or the like, and the silver layer 14 is formed thereon as a magnetic concealing layer for concealing the magnetic recording. A print layer 15 on which precautionary notes and the like are printed and a protective layer 16 for protecting the surface thereof are formed. A similar print layer 17 is formed on the front surface (lower surface in FIG. 1) of the PET substrate 12, and a protective layer 18 is formed to protect the print surface. The thickness of each layer is, for example, about 0.005 mm to 0.02 mm. In the case where each layer is formed on the back surface and the front surface of the PET base material 12 as described above, the end faces of each layer are exposed in the state of being punched out into a card of a required size by a punching die. And protective layers 16, 18
The protective film 1 is formed on the entire back surface and front surface where the
9 is coated. That is, such a protective film 19
Is formed on the magnetic card 11 as shown in FIG.
A film that includes cut surfaces 21, 22, 23, and 24 at some places and is formed on the back surface and the front surface, and that can prevent scattering of components from the end faces of each layer, corrosion of other components and corrosion due to oxidation. Good.

FIG. 3 is a diagram showing a manufacturing process of the magnetic card of the embodiment of the present invention. As shown in the figure, first, a PET base material sheet is used, and a magnetic layer, a silver layer, or the like is formed on the back surface side thereof by magnetic coating (steps ST1 and ST2). Next, a printing layer is formed by printing with an offset printing machine or the like (step 3), and a protective layer for printing is added to this (step 4). Next, a die is punched into a card shape by a punching die (step 5), and finally a protective film is attached to the entire surface of the punched card (step 6).

According to the magnetic card 11 having the above-mentioned structure, the entire surface including the cut surface portion where the end face of each layer is exposed by die cutting is covered with the protective film 19, so that the exposed end face of each layer is protected and the reader. -Even when it comes into contact with the transport path roller of the writer device or the read / write magnetic head, the components of each layer do not become dust or the like and are not scattered to the outside. Output reduction in reading / writing due to adhesion is prevented. In addition, it does not cause a transport slip. further,
The protective film 19 prevents dust and the like from entering each layer, and
In particular, corrosion will not penetrate into the inside from the end surface of the magnetic layer 13.

In the above embodiment, an example was described in which the cut surface side including the end face of each layer and the entire back surface and front surface on which the protective layers 16 and 18 were formed were covered with the protective film 19. The invention is not limited to this, and the protective film 19 may be formed on at least four cut surfaces 21, 22, 23, and 24.

In the description of the manufacturing process of the above embodiment,
Although die cutting is performed after the printing process, if the number of cards is small, it is necessary to make an unprinted card by punching the magnetic coated PET base material in advance into the card die, and then It may be printed accordingly. Even when such a step is taken, a protective film is attached to the cut surface in the last step.

[0014]

As described above, according to the present invention, since the protective film is formed on at least the cut surface of the magnetic card, each layer is not exposed at the cut surface, and the components of each layer are exposed to the outside. There is an effect that scattering is eliminated, and invasion of other components or invasion of corrosion is prevented.

[Brief description of drawings]

FIG. 1 is a diagram showing a partial cross section of a magnetic card according to an embodiment of the present invention.

FIG. 2 is a perspective view of a magnetic card according to an embodiment of the present invention.

FIG. 3 is a diagram showing a manufacturing process of the magnetic card according to the embodiment of the present invention.

FIG. 4 is a diagram showing a partial cross section of a conventional magnetic card.

[Explanation of symbols]

 11 Magnetic Card 12 PET Base Material 13 Magnetic Layer 14 Silver Layer 15 Printing Layer 16 Protective Layer 17 Printing Layer 18 Protective Layer 19 Protective Film 21, 22, 23, 24 Cut Surface

Claims (1)

[Claims] 1. A magnetic card in which a magnetic layer, a printing layer, and a protective layer for recording information on a PET substrate are formed, wherein a protective film is formed on at least a cut surface of an end face of the card.