JPH0533460B2 - - Google Patents
Info
- Publication number
- JPH0533460B2 JPH0533460B2 JP59267662A JP26766284A JPH0533460B2 JP H0533460 B2 JPH0533460 B2 JP H0533460B2 JP 59267662 A JP59267662 A JP 59267662A JP 26766284 A JP26766284 A JP 26766284A JP H0533460 B2 JPH0533460 B2 JP H0533460B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic recording
- recording layer
- coercive force
- information
- force magnetic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Credit Cards Or The Like (AREA)
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
Description
発明の目的 Purpose of invention
本発明は、偽造が困難であつて、かつ真偽の判
別が容易な、磁気記録媒体をもつカード類に関
し、そのカード類を使用する記録方法をも包含す
る。
The present invention relates to cards having a magnetic recording medium that are difficult to forge and whose authenticity can be easily determined, and also includes a recording method using the cards.
近年、磁気記録媒体をもつカード類の普及は著
しく、キヤツシユカード、銀行通帳をはじめ、ク
レジツトカード、乗車券、回数券、定期券など、
広い範囲で利用されている。こうした磁気カード
類の普及について、磁気カード類を偽造または複
製して悪用する者があらわれ、その防止とカード
類の真偽を適確に判別する技術が要求されてい
る。
In recent years, cards with magnetic recording media have become extremely popular, including cash cards, bank passbooks, credit cards, train tickets, coupon tickets, commuter passes, etc.
It is used in a wide range of areas. With the spread of such magnetic cards, there are some people who misuse magnetic cards by forging or copying them, and there is a need for technology to prevent such fraud and to accurately determine the authenticity of cards.
本発明の目的は、上記の要求にこたえ、偽造を
効果的に防止するとともに、偽造されも真偽を容
易に判別し、偽カードを排除できるような磁気記
録媒体をもつカード類を提供し、それを使用して
真偽判別および偽造防止を確実に行なう記録方法
をも提供することにある。
発明の構成
The purpose of the present invention is to meet the above requirements and provide cards having a magnetic recording medium that can effectively prevent counterfeiting, easily distinguish between genuine and false cards even if they are counterfeited, and eliminate counterfeit cards. Another object of the present invention is to provide a recording method that uses the method to reliably determine authenticity and prevent forgery. Composition of the invention
図面を参照して説明すれば、本発明の磁気記録
媒体をもつカード類は、第１図および第２図に示
すような基材１の上に磁気記録層２を有するカー
ド類において、磁気記録層２が上層の低抗磁力磁
気記録層２Ａおよび下層の高抗磁力磁気記録層２
Ｂからなることを特徴とする。
本発明の磁気記録媒体をもつカード類の記録方
法は、上記の構造の、すなわち基材１の上に上層
に低抗磁力磁気記録層２Ａと下層の高抗磁力磁気
記録層２Ｂとからなる磁気記録層２を有するカー
ド類を用い、ひとつの態様は、高抗磁力磁気記録
層２Ｂに真の情報を書き込むとともに低抗磁力磁
気記録層２Ａに偽の情報を書き込むことによつて
記録を行ない、低抗磁力磁気記録層２Ａの偽の情
報を消去して高抗磁力磁気記録層２Ｂの真の情報
をよむことによつて読みとりを行なうことを特徴
とする。
いまひとつの態様は、磁気記録層２に、たとえ
ば第１図に符号４で示したような照合用トラツク
４を設け、その高抗磁力磁気記録層２Ｂの部分に
照合用情報を書き込んだ後、低抗磁力磁気記録層
２Ａの部分に偽の情報を書き込むとともに情報用
トラツクに情報を書き込むことによつて記録を行
ない、照合用トラツクの低抗磁力磁気記録層の情
報を消去して高抗磁力磁気記録層の照合用情報を
読み、真のカードであることを確認して、偽物は
排除した上で真のカードの情報用トラツクの情報
を読むことによつて読みとりを行なうことを特徴
とする。
To explain with reference to the drawings, cards having a magnetic recording medium of the present invention have a magnetic recording layer 2 on a base material 1 as shown in FIGS. 1 and 2. Layer 2 includes an upper low coercive force magnetic recording layer 2A and a lower high coercive force magnetic recording layer 2.
It is characterized by consisting of B. The recording method for cards having a magnetic recording medium of the present invention is based on the above-mentioned structure, that is, a magnetic recording layer consisting of a low coercive force magnetic recording layer 2A as an upper layer and a high coercive force magnetic recording layer 2B as a lower layer on a base material 1. Using a card having a recording layer 2, one embodiment performs recording by writing true information in the high coercive force magnetic recording layer 2B and writing false information in the low coercive force magnetic recording layer 2A, It is characterized in that reading is performed by erasing false information from the low coercive force magnetic recording layer 2A and reading true information from the high coercive force magnetic recording layer 2B. Another embodiment is to provide the magnetic recording layer 2 with a verification track 4, for example, as shown by reference numeral 4 in FIG. Recording is performed by writing false information in the coercive force magnetic recording layer 2A and information on the information track, and erasing the information in the low coercive force magnetic recording layer of the verification track to create a high coercive force magnetic field. The card is characterized in that reading is performed by reading the verification information on the recording layer, confirming that it is a genuine card, excluding counterfeit cards, and then reading the information on the information track of the genuine card.
第一の態様において、高抗磁力磁気記録層２Ｂ
に真の情報を書き込んだ後に低抗磁力磁気記録層
２Ａに偽の情報を書き込んでも、真の情報の記録
層は抗磁力が高いため後の書き込みによる影響は
受けない。すなわち、低抗磁力層用書込電流がノ
イズを与えることはない。このカード類を通常の
読みとり装置で読むと、真の情報と偽の情報とが
重なつて読まれ、何が真の情報かわからない。ま
た、コピーをしても無意味である。本発明に従つ
て、低抗磁力磁気記録層２Ａに書き込まれている
偽の情報を消去した後、高抗磁力磁気記録層２Ｂ
に書き込まれている真の情報を読みとると、真の
情報の記録層は抗磁力が高いため、偽の情報を消
去する低抗磁力用消去電流が消去されるおそれは
ない。通常の低抗磁力磁気記録層だけをもつカー
ド類に、上記の真偽とりまぜた情報をコピーした
ものは、この消去によつてすべての情報が消され
てしまうから、容易に偽物であることがわかる。
第二の態様においては、照合用トラツクの高抗
磁力磁気記録の部分の照合用情報に対し、その上
の低抗磁力磁気記録層に書き込みおよび消去され
る情報が、上記の偽の情報の役割を果して、カー
ドの真偽の判別を容易にするとともに照合用情報
のコピーを困難にする。この態様によるときは、
情報は低抗磁力磁気記録層に書き込めばよく、照
合用情報との対応関係を確認してカードを処理で
きるから、真偽の判別はいつそう確実になる。
In the first embodiment, the high coercive force magnetic recording layer 2B
Even if false information is written in the low coercive force magnetic recording layer 2A after true information is written in the magnetic recording layer 2A, since the true information recording layer has a high coercive force, it will not be affected by subsequent writing. That is, the write current for the low coercive force layer does not give noise. When these cards are read with a normal reading device, true information and false information overlap, and it is difficult to tell which information is true. Also, there is no point in copying. According to the present invention, after erasing the false information written in the low coercive force magnetic recording layer 2A, the high coercive force magnetic recording layer 2B
When the true information written in the information is read, since the recording layer of the true information has a high coercive force, there is no risk that the low coercive force erasing current used to erase false information will be erased. If you copy the above-mentioned information that is both true and false onto a card that has only a normal low coercive force magnetic recording layer, it is easy to identify it as a fake because all the information will be erased by this process. Recognize. In the second embodiment, the information written and erased in the low coercivity magnetic recording layer above the verification information in the high coercivity magnetic recording portion of the verification track plays the role of the above-mentioned false information. This makes it easier to determine whether a card is genuine or not, and makes it difficult to copy verification information. When according to this aspect,
Information can be written on the low coercive force magnetic recording layer, and the card can be processed by checking the correspondence with verification information, making it easy to determine authenticity.
本発明で「カード類」とは、キヤツシユカード
やクレジツトカードに限らず乗車券や回数券、預
金通帳を含む意味である。
「記録」とは、上述したところから明らかなよ
うに、磁気記録層へ書き込み、読み出しの両方を
包含する語である。
磁気記録層には、常用のコバルト被着ガンマ酸
化鉄そのほか、任意の磁性材料を、適宜のバイン
ダーとともに使用する。カード類の基材は、任意
にえらぶことができる。
磁気記録層が耐摩耗性を必要とする場合は、そ
の上に保護層３を設ける。
磁気記録層をつくるには、磁性材料を含有する
インキの印刷によるのがよい。すなわち低抗磁力
磁気記録層２Ａのベタ印刷と高抗磁力磁気記録層
２Ｂのベタ印刷との組み合わせである。このよう
な磁気記録層を基材に合体させる手段の代表的な
ものは、後に実施例を示す熱転写であるが、もち
ろんそのほかの手段によつてもよい。
上記した本発明の記録方法の効果を一層確実に
するためには、高抗磁力磁気記録層２Ｂから真の
情報を読みとつた後、いつたん消去をした低抗磁
力磁気記録層２Ａに、再度偽の情報を書き込ん
で、真の情報を隠すことが好ましい。再度与える
偽の情報は、いうまでもなく、さきに消去したも
のと同じであつてもよいし（この場合は、偽の情
報を消去するに先立つてバツフアメモリに保存し
ておくことになる）、異なる情報であつてもよい。
このことは、第二の態様における照合用トラツク
に関しても、そのままあてはまる。
In the present invention, "cards" is not limited to cash cards and credit cards, but also includes train tickets, coupon tickets, and bankbooks. As is clear from the above, the term "recording" includes both writing to and reading from the magnetic recording layer. For the magnetic recording layer, in addition to the commonly used cobalt-coated gamma iron oxide, any other magnetic material is used together with a suitable binder. The base material for the cards can be selected arbitrarily. If the magnetic recording layer requires wear resistance, a protective layer 3 is provided thereon. The magnetic recording layer is preferably produced by printing with an ink containing a magnetic material. That is, it is a combination of solid printing of the low coercive force magnetic recording layer 2A and solid printing of the high coercive force magnetic recording layer 2B. A typical means for combining such a magnetic recording layer with a base material is thermal transfer, which will be described in an embodiment later, but of course other means may also be used. In order to further ensure the effect of the recording method of the present invention described above, after reading the true information from the high coercive force magnetic recording layer 2B, once again the erased low coercive force magnetic recording layer 2A is It is preferable to write false information and hide true information. Needless to say, the false information given again may be the same as the one that was deleted earlier (in this case, the false information will be saved in the buffer memory before being deleted), It may be different information.
This also applies to the verification track in the second embodiment.
下記の原料を配合して（「部」はいずれも重量
部）、剥離材を調製した。
酢酸セルロール樹脂（大日本セルロイド） ５部
メチロールメラミン系熱硬化性樹脂（日本カーバ
イド） １部
メチルエチルケトン 50部
メチアルコール 25部
トルエン 25部
厚さ25μのポリエステルのベースフイルム上
に、上記の剥離材をグラビアコートし厚さ1μの
剥離層を形成した。
次に、下記の原料を配合して、保護層用塗料を
調製した。
ポリビニルブチラール樹脂「エスレツクBX」
（積水化学） ３部
湿気硬化型ウレタン樹脂「オレスターM95−
50A」（三井東圧） ３部
メチルエチルケトン 30部
トルエン 30部
酢酸エチル 30部
上記の保護層用塗料を剥離層上にグラビアコー
トし、厚さ1μの保護層を形成した。
下記の原料を配合し、低抗磁力磁性塗料を調製
した。
γ−Fe2O3（Hc＝300Oe） 70部
部分ケン化塩化ビニル／酢酸ビニル共重合樹脂
「ビニライトVAGH」（UCC） 15部
ポリウレタンエラストマー樹脂「サンプレン
IB114B」（三井化成工業） 30部
線状飽和ポリエステル樹脂
「バイロンRV53SS」（東洋紡） 15部
イソプロピルアルコール 50部
メチルエチルケトン 50部
トルエン 50部
イソシアネート系硬化剤「ATマイテツクNY−
220A」（三菱化成） ３部
上記の低抗磁力磁性塗料をグラビアコート法に
より保護層上に全面コーテイングし、低抗磁力磁
気記録層２Ａを形成した。
下記の原料を配合して、高抗磁力磁性塗料を調
製した。
BaO−6Fe2O（Hc＝3000Oe） 70部
部分ケン化塩化ビニル／酢酸ビニル共重合樹脂
「ビニライトVAGH」（UCC） ５部
ポリウレタンエラストマー樹脂「サンプレン
IB114B」（三井化成工業） 40部
線状飽和ポリエステル樹脂「バイロンRV53SS」
（東洋紡） 20部
イソプロピルアルコール 50部
メチルエチルケトン 50部
トルエン 50部
イソシアネート系硬化剤「ATアイテツクNY−
220A」（三菱化成） ３部
上記の高抗磁力磁性塗料を、グラビアコート法
により、低抗磁力磁気記録層２Ａに部分的にまた
は全面的にコーテイングして、高抗磁力磁気記録
層２Ｂを形成した。
下記の原料を配合して、ホツトメルト接着剤塗
料を調製した。
塩化ビニル／酢酸ビニル共重合樹脂「デンカラツ
ク721」（電気化学） １部
アクリル樹脂 ２部
トルエン ８部
酢酸エチル ８部
上記のホツトメルト接着剤塗料を磁気記録層上
に、グラビアコートし、厚さ10μのホツトメルト
接着層を形成した。
以上の順序で形成した転写シートを6.5mm幅に
スリツトし、カード基材に用いる厚さ100μのポ
リ塩化ビニルシートの所定の位置に熱転写し、ベ
ースフイルムであるポリエステルフイルムを剥離
した。こうして用意した磁気記録層つきのオーバ
ーシートに、ポリ塩化ビニルのセンターコア（厚
さ560μ）と、やはりポリ塩化ビニルのオーバー
シート（厚さ100μ）とをこの順に重ね、150℃、
25Kg／cm2の条件で加熱加圧して積層し、仕上げ、
打抜きを行ない、縦86mm、幅54mm、厚さ0.76mmの
カードを得た。
このように製造した磁気記録媒体をもつカード
に、高抗磁力磁気記録層に真の情報を書き込むと
ともに低抗磁力磁気記録層に偽の情報を書き込ん
だ。読みとりは、低抗磁力磁気記録層の偽の情報
を消去して、高抗磁力磁気記録層の真の情報をよ
みとることができた。
なお、保護層と磁気記録層の間に着色層を設け
てもよいし、着色層と磁気記録層の間に、蒸着層
を設けてもよい。
発明の効果
本発明の磁気記録媒体をもつカードは、外部か
らは磁気記録層の厚さが２層構造になつているこ
とがわからず、偽造困難である。普通の読みとり
装置では偽の情報を読んでしまうから、真の情報
が読めず、コピーもできない。
A release material was prepared by blending the following raw materials (all parts are by weight). Cellulose acetate resin (Dainippon Celluloid) 5 parts Methylolmelamine thermosetting resin (Nippon Carbide) 1 part Methyl ethyl ketone 50 parts Methyl alcohol 25 parts Toluene 25 parts Gravure the above release material onto a 25μ thick polyester base film. A release layer with a thickness of 1 μm was formed by coating. Next, the following raw materials were blended to prepare a coating for a protective layer. Polyvinyl butyral resin “Eslec BX”
(Sekisui Chemical) 3-part moisture-curing urethane resin "Orestar M95-
50A'' (Mitsui Toatsu) 3 parts methyl ethyl ketone 30 parts toluene 30 parts ethyl acetate 30 parts The above paint for the protective layer was gravure coated on the release layer to form a protective layer with a thickness of 1 μm. A low coercive force magnetic paint was prepared by blending the following raw materials. γ-Fe 2 O 3 (Hc=300Oe) 70 parts Partially saponified vinyl chloride/vinyl acetate copolymer resin "Vinyrite VAGH" (UCC) 15 parts Polyurethane elastomer resin "Samplen"
IB114B" (Mitsui Chemicals) 30 parts Linear saturated polyester resin "Vylon RV53SS" (Toyobo) 15 parts Isopropyl alcohol 50 parts Methyl ethyl ketone 50 parts Toluene 50 parts Isocyanate curing agent "AT Mitek NY-
220A'' (Mitsubishi Kasei) 3 parts The above low coercive force magnetic paint was coated on the entire surface of the protective layer by gravure coating to form a low coercive force magnetic recording layer 2A. A high coercive force magnetic paint was prepared by blending the following raw materials. BaO−6Fe 2 O (Hc=3000Oe) 70 parts Partially saponified vinyl chloride/vinyl acetate copolymer resin "Vinyrite VAGH" (UCC) 5 parts Polyurethane elastomer resin "Samplen"
IB114B” (Mitsui Chemicals) 40 parts linear saturated polyester resin “Vylon RV53SS”
(Toyobo) 20 parts Isopropyl alcohol 50 parts Methyl ethyl ketone 50 parts Toluene 50 parts Isocyanate hardening agent "AT ITEC NY-"
220A'' (Mitsubishi Kasei) Part 3 The above high coercive force magnetic paint is partially or fully coated on the low coercive force magnetic recording layer 2A by gravure coating to form the high coercive force magnetic recording layer 2B. did. A hot melt adhesive paint was prepared by blending the following raw materials. Vinyl chloride/vinyl acetate copolymer resin "Denkaratsuku 721" (Electrochemical) 1 part acrylic resin 2 parts toluene 8 parts ethyl acetate 8 parts The above hot melt adhesive paint was gravure coated on the magnetic recording layer to a thickness of 10 μm. A hot melt adhesive layer was formed. The transfer sheet formed in the above order was slit to a width of 6.5 mm and thermally transferred to a predetermined position on a 100 μm thick polyvinyl chloride sheet used as a card base material, and the polyester film serving as the base film was peeled off. A polyvinyl chloride center core (thickness: 560 μm) and a polyvinyl chloride oversheet (thickness: 100 μm) were layered in this order on the oversheet with the magnetic recording layer prepared in this way, and heated at 150°C.
Laminated under heat and pressure under conditions of 25Kg/ cm2 , finished,
A card with a length of 86 mm, a width of 54 mm, and a thickness of 0.76 mm was obtained by punching. True information was written in the high coercive force magnetic recording layer and false information was written in the low coercive force magnetic recording layer of a card having the magnetic recording medium manufactured in this manner. In reading, it was possible to erase false information from the low coercive force magnetic recording layer and read true information from the high coercive force magnetic recording layer. Note that a colored layer may be provided between the protective layer and the magnetic recording layer, or a vapor deposited layer may be provided between the colored layer and the magnetic recording layer. Effects of the Invention A card having the magnetic recording medium of the present invention is difficult to counterfeit because it is not obvious from the outside that the magnetic recording layer has a two-layer structure. Ordinary reading devices read false information, so the true information cannot be read or copied.
第１図は、本発明の磁気記録媒体をもつカード
類の一部分を示す平面図である。第２図は、第１
図−方向の拡大断面図である。
１……基材、２……磁気記録層、２Ａ……低抗
磁力磁気記録層、２Ｂ……高抗磁力磁気記録層、
３……保護層、４……照合用トラツク。
FIG. 1 is a plan view showing a portion of cards having the magnetic recording medium of the present invention. Figure 2 shows the first
It is an enlarged cross-sectional view in the figure-direction. 1...Base material, 2...Magnetic recording layer, 2A...Low coercive force magnetic recording layer, 2B...High coercive force magnetic recording layer,
3...Protective layer, 4...Verification track.
Claims (1)
において、磁気記録層２が、偽の情報を書き込む
ための上層の低抗磁力磁気記録層２Ａ、および正
規の情報を書き込むための下層の高抗磁力磁気記
録層２Ｂからなることを特徴とする磁気記録媒体
をもつカード類。 ２ 磁気記録層２の上の保護層３を有する特許請
求の範囲第１項の磁気記録媒体をもつカード類。 ３ 基材１の上に上層の低抗磁力磁気記録層２Ａ
と下層の高抗磁力磁気記録層２Ｂとからなる磁気
記録層２を有するカード類を用い、高抗磁力磁気
記録層２Ｂに真の情報を書き込むとともに低抗磁
力磁気記録層２Ａに偽の情報を書き込むことによ
つて記録を行ない、低抗磁力磁気記録層２Ａの偽
の情報を消去して高抗磁力磁気記録層２Ｂの真の
情報を読むことによつて読みとりを行なうことを
特徴とする磁気記録媒体をもつカード類の記録方
法。 ４ 真の情報を読みとつた後、低抗磁力磁気記録
層２Ａに再度偽の情報を書き込んで高抗磁力磁気
記録層２Ｂの真の情報を隠すことを含む特許請求
の範囲第３項の磁気記録媒体をもつカード類の記
録方法。 ５ 基材１の上に上層の低抗磁力磁気記録層２Ａ
と下層の高抗磁力磁気記録層２Ｂとからなる磁気
記録層２を有するカード類を用い、磁気記録層２
に照合用トラツク４の設け、その高抗磁力磁気記
録層２Ｂの部分に照合用情報を書き込んだ後、低
抗磁力磁気記録層２Ａの部分に何らかの情報を書
き込むとともに情報用トラツクに情報を書き込む
ことによつて記録を行ない、照合用トラツク４の
低抗磁力磁気記録層の情報を消去して高抗磁力磁
気記録層の照合用情報を読んだ上で、情報用トラ
ツクの情報を読むことによつて読みとりを行なう
ことを特徴とする磁気記録媒体をもつカード類の
記録方法。[Claims] 1. Cards having a magnetic recording layer 2 on a base material 1, in which the magnetic recording layer 2 includes an upper low coercive force magnetic recording layer 2A for writing false information, and an upper low coercive force magnetic recording layer 2A for writing false information; Cards having a magnetic recording medium comprising a lower high coercive force magnetic recording layer 2B for writing. 2. Cards having a magnetic recording medium according to claim 1, which has a protective layer 3 on a magnetic recording layer 2. 3 Upper low coercive force magnetic recording layer 2A on base material 1
Using a card having a magnetic recording layer 2 consisting of a high coercive force magnetic recording layer 2B and a lower high coercive force magnetic recording layer 2B, true information is written in the high coercive force magnetic recording layer 2B and false information is written in the low coercive force magnetic recording layer 2A. A magnetic device characterized in that recording is performed by writing, and reading is performed by erasing false information in the low coercive force magnetic recording layer 2A and reading true information in the high coercive force magnetic recording layer 2B. A recording method for cards with recording media. 4. The magnetic field according to claim 3, which includes hiding the true information in the high coercive force magnetic recording layer 2B by writing false information again in the low coercive force magnetic recording layer 2A after reading the true information. A recording method for cards with recording media. 5 Upper low coercive force magnetic recording layer 2A on base material 1
Using a card having a magnetic recording layer 2 consisting of a lower high coercive force magnetic recording layer 2B
A verification track 4 is provided in the high coercive force magnetic recording layer 2B, and then some information is written in the low coercive force magnetic recording layer 2A, and information is also written on the information track. After erasing the information on the low coercive force magnetic recording layer of the verification track 4 and reading the verification information on the high coercive force magnetic recording layer, the information on the information track is read. A method for recording cards having a magnetic recording medium, which is characterized in that reading is performed using a magnetic recording medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59267662A JPS61145727A (en) | 1984-12-19 | 1984-12-19 | Cards having magnetic recording medium and its recording method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59267662A JPS61145727A (en) | 1984-12-19 | 1984-12-19 | Cards having magnetic recording medium and its recording method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61145727A JPS61145727A (en) | 1986-07-03 |
| JPH0533460B2 true JPH0533460B2 (en) | 1993-05-19 |
Family
ID=17447788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59267662A Granted JPS61145727A (en) | 1984-12-19 | 1984-12-19 | Cards having magnetic recording medium and its recording method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61145727A (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2518620B2 (en) * | 1986-07-29 | 1996-07-24 | 東京磁気印刷株式会社 | Magnetic recording / reproducing method and apparatus |
| JPH0760509B2 (en) * | 1987-02-26 | 1995-06-28 | 東京磁気印刷株式会社 | Magnetic recording medium |
| JPS63153317U (en) * | 1987-03-26 | 1988-10-07 | ||
| JPH07118080B2 (en) * | 1988-06-29 | 1995-12-18 | 株式会社巴川製紙所 | Method of manufacturing magnetic recording medium |
| JPH0296614U (en) * | 1989-01-17 | 1990-08-01 | ||
| JPH02195513A (en) * | 1989-01-25 | 1990-08-02 | Tokyo Jiki Insatsu Kk | Magnetic recording medium |
| JPH0413218A (en) * | 1990-05-01 | 1992-01-17 | Tokin Corp | Magnetic card and recording/reproducing method |
| JP2949636B2 (en) * | 1990-06-05 | 1999-09-20 | 株式会社トーキン | How to determine the authenticity of a card |
| JP4496452B2 (en) * | 2001-03-30 | 2010-07-07 | Ｄｉｃ株式会社 | Magnetic recording medium |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4237189A (en) * | 1973-10-31 | 1980-12-02 | Robert J. Deffeyes | Polymodal magnetic recording media process for making and verifying the same and compositions useful therein |
| JPS54130B2 (en) * | 1974-05-16 | 1979-01-06 | ||
| JPS51129209A (en) * | 1975-05-02 | 1976-11-10 | Toshiba Corp | Record reproducing method by polylayer magnetic card |
| JPS52110613A (en) * | 1976-03-15 | 1977-09-16 | Omron Tateisi Electronics Co | Magnetic reading inspection system |
| JPS5485007A (en) * | 1977-12-19 | 1979-07-06 | Hitachi Maxell | Magnetic recording medium |
| JPS5542324A (en) * | 1978-09-18 | 1980-03-25 | Tokyo Jiki Insatsu Kk | Method and device for data read and write of magnetic card |
| JPS5567912A (en) * | 1978-11-16 | 1980-05-22 | Fuji Photo Film Co Ltd | Magnetic recording and reproducing method |
| JPS5584041A (en) * | 1978-12-20 | 1980-06-24 | Hitachi Maxell Ltd | Magnetic recording medium |
| JPS57164429A (en) * | 1981-04-01 | 1982-10-09 | Tokyo Jiki Insatsu Kk | Magnetic recording body |
| JPS5865644U (en) * | 1981-10-24 | 1983-05-04 | 共同印刷株式会社 | magnetic recording medium |
| JPS5880783A (en) * | 1981-11-09 | 1983-05-14 | Dainippon Printing Co Ltd | How to prevent counterfeiting of magnetic cards |
| JPH0512838Y2 (en) * | 1984-10-29 | 1993-04-05 | ||
| JPH056246A (en) * | 1991-06-27 | 1993-01-14 | Nec Eng Ltd | Operation control system for automatic teller machine |
-
1984
- 1984-12-19 JP JP59267662A patent/JPS61145727A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61145727A (en) | 1986-07-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5972438A (en) | Magnetic recording medium and method of manufacture of same | |
| JP3198184B2 (en) | Plastic card with magnetic stripe | |
| JPH0533460B2 (en) | ||
| JPS6213394A (en) | card | |
| JPS5891531A (en) | Document provided with magnetic stripe | |
| JPH0519845Y2 (en) | ||
| JPH0512067Y2 (en) | ||
| JPH0458642B2 (en) | ||
| JP2626858B2 (en) | Manufacturing method of magnetic recording medium | |
| JPS5880783A (en) | How to prevent counterfeiting of magnetic cards | |
| JPH0512068Y2 (en) | ||
| JP3125934B2 (en) | Magnetic recording media | |
| JPS61198465A (en) | How to write and read cards with magnetic recording media | |
| JP2706714B2 (en) | Magnetic recording medium and manufacturing method thereof | |
| JP2567787B2 (en) | Method of manufacturing magnetic recording medium | |
| JPS5847530Y2 (en) | magnetic recording medium | |
| JPH07117382A (en) | Magnetic recording medium and manufacturing method thereof | |
| JPH07121864A (en) | Magnetic recording medium and manufacturing method thereof | |
| JP2001236623A (en) | Magnetic recording media | |
| JP4012334B2 (en) | Magnetic recording medium and method for manufacturing the same | |
| JP2829422B2 (en) | Magnetic card | |
| JP4095203B2 (en) | Magnetic recording medium and method for manufacturing the same | |
| JP4028661B2 (en) | Magnetic recording medium and method for manufacturing the same | |
| JPH06338051A (en) | Magnetic recording medium and manufacturing method thereof | |
| JP2636542B2 (en) | Magnetic recording medium and information reading method thereof |