Magnetic card having thermal recording layer and arrangement of

Details Magnetic card having thermal recording layer and arrangement of Magnetic card having thermal recording layer and arrangement of

1990-12-04

1992-05-12

Levy, Stuart S.

Registers

Records

Magnetic

235494, 427131, 283904, G06K 1906, B05D 512, B42D 1500

Patent

active

051130629

DESCRIPTION:

BRIEF SUMMARY
TECHNICAL FIELD

This invention relates to a magnetic card and more particularly, to a magnetic card wherein visible patterns or visible information can be written, and where the security of magnetic recording is improved.
The invention can be effectively applied to pre-paid cards such as a telephone card wherein numerals corresponding to the contents of magnetic recording are printed.


TECHNICAL BACKGROUND

Magnetic cards are handy to carry and are widely used. The magnetic card has a magnetic recording layer formed on a desired region of the surface of a substrate having an appropriate thickness.
Magnetically recorded information such as a record of use and a balance account (remainder), etc. cannot be seen in the magnetic card and therefore, the remainder was roughly indicated by punched holes and the like in the pre-paid magnetic card. However, since the precise remainder is not indicated, cash or another pre-paid magnetic card must be supplied when the remainder is insufficient. In order to avoid such a situation, it is required to print the record of use, the remainder and the like.
Conventionally, printing is generally performed on the surface of a magnetic card opposite to the magnetic recording layer by a wire dot printing head through a pressure sensitive ribbon, by a thermal printing head through a heat sensitive ink ribbon or by a thermal printing head to a heat sensitive recording layer formed on the card surface. However, a desired design is generally formed on the surface of the magnetic card opposite to the magnetic recording layer and a wide area for the above printing is not desirable in terms of the above design.
Conventionally, printing is performed on the side of the magnetic recording layer of the magnetic card in some cases and in such cases the magnetic recording layer is partially formed on the substrate in one area of the card and printing is performed on the other area. Therefore, it is impossible to make both the magnetic recording area and the printing area sufficiently large.
Recently, a larger amount of information is being recorded in the magnetic cards and therefore, it is preferable that the magnetic recording area be large and the printing area be as large as possible.
On the other hand, there has arisen a problem of wrongful use of the magnetic card, such as forgery, alteration and the like, and therefore, it is important to improve the security of the magnetic card.


DISCLOSURE OF THE INVENTION

Accordingly, it is an object of this invention to provide a magnetic card wherein visible patterns (information) such as letters, marks and figures can be written as superposed on a magnetic recording layer and security is improved.
According to this invention, the above object are achieved by a magnetic card wherein visible patterns can be written, in which a magnetic recording layer is formed on a substrate, a sensitizing layer is formed on the magnetic recording layer, a metallic thin layer is formed on the sensitizing layer, a protective layer is formed on the metallic thin layer, an arrangement of magnetic bars is formed on the protective layer at one region of the magnetic card, and at least one information track is formed in the magnetic recording layer at the other region of the magnetic card, the sensitizing layer being for improving the writing characteristics by receiving fine particles of material of the metallic thin layer formed by heating.
According to this invention, the above object are also achieved by a magnetic card wherein visible patterns can be written, in which a magnetic recording layer is formed on a substrate, an arrangement of magnetic bars is formed on the magnetic recording layer at one region of the magnetic card, a sensitizing layer is formed on the magnetic recording layer and magnetic bars, a metallic thin layer is formed on the sensitizing layer, a protective layer is formed on the metallic thin layer, and at least one information track is formed in the magnetic recording layer at the other region of the magnetic card, the sensitizing layer b

REFERENCES:
patent: 3790754 (1974-02-01), Black et al.
patent: 4044231 (1977-08-01), Beck et al.
patent: 4132350 (1979-01-01), Kubota et al.
patent: 4315145 (1982-02-01), Nishikawa et al.
patent: 4849618 (1989-07-01), Namikawa et al.

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