公开(公告)号：WO1997039443A1

公开(公告)日：1997-10-23

申请号：PCT/JP1996002032

申请日：1996-07-19

Applicant: KABUSIKI KAISYA I.C.M. ,  MURATA, Yoshitomi ,  ITO, Hisao

Inventor： KABUSIKI KAISYA I.C.M. ,  MURATA, Yoshitomi

IPC: G11B05/80

CPC classification number: G11B5/852 ,  G06K19/06196 ,  G11B5/00

Abstract: A magnetic recording medium and a method for magnetic signal writing on the recording material. The method comprises the first step of forming a magnetic recording layer by applying magnetic paint to the surface of a substrate, the second step of writing signals onto the magnetic recording layer while the magnetic recording layer is wet, and the third step of fixing the written signals by drying the magnetic recording layer immediately after the write operation. In this method, unlike the conventional method, the magnetic recording layer is dried after the write operation onto the wet recording layer. As a result, magnetic particles in the recording layer form density patterns and information is magnetically recorded in the patterns. Therefore, this magnetic recording medium can fix the magnetically recorded signals. When the signals are written by using this method, unauthorized use of magnetic card can be prevented, because the recorded signals are neither erasable nor rewritten.

Abstract translation: 一种磁记录介质和用于在记录材料上写入磁信号的方法。 该方法包括通过向基板的表面施加磁性涂料形成磁记录层的第一步骤，在磁记录层湿的同时将信号写入磁记录层的第二步骤，以及第三步骤， 在写入操作之后立即干燥磁记录层的信号。 在该方法中，与传统方法不同，磁记录层在写入操作之后被干燥到湿式记录层上。 结果，记录层中的磁性颗粒形成密度图案，并且信息被磁性记录在图案中。 因此，该磁记录介质可以固定磁记录信号。 当使用这种方法写入信号时，由于记录的信号既不可擦除也不能被重写，因此可以防止非法使用磁卡。

公开(公告)号：WO1990013114A1

公开(公告)日：1990-11-01

申请号：PCT/JP1990000420

申请日：1990-03-29

Applicant: KYODO PRINTING CO., LTD. ,  FUJITA, Minoru ,  NAKAHARA, Yoshihiko

Inventor： KYODO PRINTING CO., LTD.

IPC: G11B05/80

CPC classification number: G06K19/12 ,  G06K19/06187 ,  G11B5/80 ,  G11B5/855 ,  Y10S283/904

Abstract: A magnetic card on which a visible pattern can be written according to the present invention is characterized in that an underlying layer (6) is formed on a magnetic recording layer (4), that a metallic thin layer (8) is formed on said underlying layer (6), and that a magnetic bar code (12) is formed between the magnetic recording layer (4) and the underlying layer (6), between the underlying layer (6) and the metallic thin layer (8), and/or above the metallic thin layer (8).

Abstract translation: 根据本发明，其上可写入可见图案的磁卡的特征在于，在磁记录层（4）上形成下层（6），金属薄层（8）形成在所述底层 层（6），并且在下面的层（6）和金属薄层（8）之间的磁记录层（4）和下层（6）之间形成磁条码（12）和/ 或金属薄层（8）之上。

公开(公告)号：WO1997039442A1

公开(公告)日：1997-10-23

申请号：PCT/JP1996002031

申请日：1996-07-19

Applicant: KABUSIKI KAISHA I.C.M ,  MURATA, Yoshitomi ,  ITO, Hisao

Inventor： KABUSIKI KAISHA I.C.M ,  MURATA, Yoshitomi

IPC: G11B05/80

CPC classification number: G11B23/282 ,  G11B5/7325 ,  G11B20/00608

Abstract: A magnetic recording medium provided with a destructible layer (2) between a substrate (1) and a magnetic recording layer (3). The destructible layer (2) is formed of a low-melting metal, such as tin, lead, or zinc, or its alloy, whose melting point is equal to or lower than that of the substrate (1). Alternatively, the destructible layer (2) can be made of a resin. The destructible layer (2) of the magnetic recording medium is destroyed by some means, including a thermal head, laser, polishing, etc. When the destructible layer (2) is destroyed, the magnetic recording layer (3) is also destroyed simultaneously. When the layer (3) is destroyed, recorded magnetic signals are not able to be rewritten and, therefore, unauthorized use of the magnetic recording medium can be prevented. Instead of the destructible layer (2), a fusing agent (5) may be mixed in the magnetic recording layer (3) to obtain the same effect.

Abstract translation: 一种在基板（1）和磁记录层（3）之间设有可破坏层（2）的磁记录介质。 可破坏层（2）由熔点等于或低于基板（1）的锡，铅或锌的低熔点金属或其合金形成。 或者，可破坏层（2）可以由树脂制成。 磁记录介质的可破坏层（2）通过某种方式被破坏，包括热敏头，激光，抛光等。当破坏层（2）被破坏时，磁记录层（3）也同时被破坏。 当层（3）被破坏时，记录的磁信号不能被重写，因此可以防止非法使用磁记录介质。 代替可破坏层（2），可以在磁记录层（3）中混合定影剂（5）以获得相同的效果。

公开(公告)号：WO1990004843A1

公开(公告)日：1990-05-03

申请号：PCT/FR1989000536

申请日：1989-10-17

Applicant: KODAK-PATHE ,  PINGAUD, Bernard

Inventor： KODAK-PATHE

IPC: G11B05/80

CPC classification number: G11B5/70678 ,  G11B5/70 ,  G11B5/7006 ,  G11B5/80 ,  Y10S283/904 ,  Y10S428/90 ,  Y10T428/24355 ,  Y10T428/254 ,  Y10T428/256 ,  Y10T428/257 ,  Y10T428/264 ,  Y10T428/265 ,  Y10T428/266 ,  Y10T428/31507 ,  Y10T428/3154 ,  Y10T428/31544 ,  Y10T428/31609

Abstract: The invention relates to a high density high energy magnetic memory card. The card is provided throughout or part of at least one of its surfaces with a recording medium which contains magnetic particles having a coercitive field higher than 4000 Oe (320 kA/m), which has no overlying layer and which has a density of information higher than 5 kbits/cm , an electric wear corresponding to an electric signal loss equal to or lower than 5 % for 2000 passages, a mean arithmetic rugosity lower than 10 nm, an abrasivity lower than 600 mu m, and a streak resistance lower than 1.5 mu m. Application to portable files and access controls.

公开(公告)号：WO1997044783A1

公开(公告)日：1997-11-27

申请号：PCT/JP1996002033

申请日：1996-07-19

Applicant: KABUSHIKI KAISHA I.C.M. ,  MURATA, Yoshitomi ,  ITO, Hisao

Inventor： KABUSHIKI KAISHA I.C.M. ,  MURATA, Yoshitomi

IPC: G11B05/80

CPC classification number: G11B5/00808 ,  G06K19/06196 ,  G11B5/80 ,  G11B5/852 ,  G11B23/288

Abstract: A magnetic recording medium wherein erasing and rewriting of magnetic recording signals are impossible. Magnetic recording signals are written by preparing a magnetic recording layer on a substrate by coating the same with magnetic coating material, writing magnetic signals on the recording layer while it is still in an undried state, and immediately drying the recording layer to thereby fix the magnetic signals. According to the above procedures, the magnetic particles form a pattern composed of coarse and fine particles in the magnetic records and the magnetic recording signals are fixed. In this magnetic recording medium, incorporation of resins such as polyethylene or polypropylene in the magnetic recording layer or provision of a readily melting metal layer between the substrate and the magnetic recording layer enables the breakage of the magnetic recording layer. In this magnetic recording layer, therefore, the magnetic recording layer can be broken and the magnetic recording signals recorded on the magnetic recording layer are fixed, which prevents rewriting of magnetic recording signals irrespectively of whether the magnetic recording layer has been broken or not, thus enabling the prevention of illegal use of magnetic cards.

Abstract translation: 其中磁记录信号的擦除和重写是不可能的磁记录介质。 磁记录信号是通过用磁性涂层材料在基片上制备磁记录层来写入磁记录层，在磁记录层仍然处于未干燥状态的同时将磁信号写在记录层上，并立即干燥记录层从而固定磁记录信号 信号。 根据上述程序，磁性颗粒在磁记录中形成由粗细颗粒构成的图案，磁记录信号是固定的。 在这种磁记录介质中，将诸如聚乙烯或聚丙烯之类的树脂结合到磁记录层中或在基片和磁记录层之间提供容易熔化的金属层使得能够破坏磁记录层。 因此，在该磁记录层中，磁记录层可能被破坏，并且记录在磁记录层上的磁记录信号是固定的，这防止了磁记录信号的重写，而不管磁记录层是否已被破坏，因此 防止非法使用磁卡。

公开(公告)号：WO1992005544A1

公开(公告)日：1992-04-02

申请号：PCT/JP1991001256

申请日：1991-09-20

Applicant: KABUSHIKI KAISHA CSK ,  NIHON CARD CENTER KABUSHIKI KAISHA ,  IZAWA, Shigeru

Inventor： KABUSHIKI KAISHA CSK ,  NIHON CARD CENTER KABUSHIKI KAISHA

IPC: G11B05/80

CPC classification number: G06K19/12

Abstract: A magnetic card (1) formed of a card-like substrate (2) whose surface is provided with a data track (3) on which magnetic data are written and a clock track (4) on which clock signals are written for maintaining synchronization in writting and reading magnetic data on and from said data track (3), in which said clock track (4) is composed of a magnetic material of low residual magnetic flux density and, thus, different magnetization methods are used for the data track (3) and clock track (4), whereby easy readout of data is impossible and a great deal of improvement in security function is ensured.

Abstract translation: 一种由卡片状基板（2）形成的磁卡（1），其表面设置有数据磁道（3），磁性数据被写入该数据磁道（3），并在其上写入时钟信号用于保持同步的时钟磁道 在所述数据磁道（3）上写入和读取磁数据，其中所述时钟磁道（4）由低残余磁通密度的磁性材料组成，因此，不同的磁化方法用于数据磁道（3） ）和时钟轨道（4），从而不可能容易地读取数据，并且确保了安全功能的大量改进。