JPS61145727A - Cards having magnetic recording medium and its recording method - Google Patents
Cards having magnetic recording medium and its recording methodInfo
- Publication number
- JPS61145727A JPS61145727A JP59267662A JP26766284A JPS61145727A JP S61145727 A JPS61145727 A JP S61145727A JP 59267662 A JP59267662 A JP 59267662A JP 26766284 A JP26766284 A JP 26766284A JP S61145727 A JPS61145727 A JP S61145727A
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 8
- 239000000463 material Substances 0.000 claims abstract description 12
- 239000010410 layer Substances 0.000 claims description 79
- 238000012795 verification Methods 0.000 claims description 9
- 239000011241 protective layer Substances 0.000 claims description 8
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 15
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 12
- 239000003973 paint Substances 0.000 description 7
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 6
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 6
- 239000002994 raw material Substances 0.000 description 5
- 229920005989 resin Polymers 0.000 description 5
- 239000011347 resin Substances 0.000 description 5
- 238000002156 mixing Methods 0.000 description 4
- 239000004831 Hot glue Substances 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 3
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 3
- 229920006026 co-polymeric resin Polymers 0.000 description 3
- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 229920006387 Vinylite Polymers 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000001723 curing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007756 gravure coating Methods 0.000 description 2
- 239000012948 isocyanate Substances 0.000 description 2
- 150000002513 isocyanates Chemical class 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 229920001225 polyester resin Polymers 0.000 description 2
- 239000004645 polyester resin Substances 0.000 description 2
- 229920003225 polyurethane elastomer Polymers 0.000 description 2
- 239000004800 polyvinyl chloride Substances 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229920002160 Celluloid Polymers 0.000 description 1
- MBHRHUJRKGNOKX-UHFFFAOYSA-N [(4,6-diamino-1,3,5-triazin-2-yl)amino]methanol Chemical compound NC1=NC(N)=NC(NCO)=N1 MBHRHUJRKGNOKX-UHFFFAOYSA-N 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000013008 moisture curing Methods 0.000 description 1
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Landscapes
- Credit Cards Or The Like (AREA)
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
Abstract
Description
Ｒ里五旦刀 R-ri Godanto
本発明は、偽造が困難であって、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
ャッシュカード、銀行通帳をはじめ、クレジットカード
、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れて、磁気カ
ード類を偽造または複製して悪用する者があられれ、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。BACKGROUND ART In recent years, cards with magnetic recording media have become extremely popular and are used in a wide range of applications, including cash cards, bank passbooks, credit cards, train tickets, coupon tickets, and commuter passes. As magnetic cards become more widespread, there are people who misuse them by forging or copying them, and there is a need for technology to prevent this 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、偽造されて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
［問題点を解決するための手段］
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
坑磁力磁気記録層２Ｂ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の上に上層の低抗磁力磁気
記録層２Ａと下層の高坑磁力磁気記録層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
、高坑磁力磁気記録層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
よって記録を行ない、低抗磁力磁気記録層２Ａの偽の情
報を消去して高坑磁力磁気記録層２Ｂの真の情報をよむ
ことによっ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ック４を設け、その
高坑磁力磁気記録層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ックに情報を書き込むことによ
って記録を行ない、照合用トラックの低抗磁力磁気記録
層の情報を消、去して高坑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ックの情報を読むこ
とによって読みとりを行なうことを特徴とする。
［作 用］
第一の態様において、高坑磁力磁気記録層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
の情報とが重なって読まれ、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。 本発明に従って
、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、高坑磁力磁気記録層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で
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、この消去によっ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、照合用トラックの高抗磁力磁気
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、真偽の判別はいっそう確実になる。The purpose of the present invention is to meet the above requirements, to effectively prevent forgery, and to easily determine the authenticity even if a forgery is made.
To provide cards having a magnetic recording medium capable of eliminating fake cards, and also to provide a recording method using the cards to reliably determine authenticity and prevent forgery. Structure of the Invention [Means for Solving the Problems] To explain with reference to the drawings, cards having a magnetic recording medium of the present invention have a base material 1 as shown in FIGS. 1 and 2.
Cards having a magnetic recording layer 2 thereon are characterized in that the magnetic recording layer 2 consists of an upper low coercive force magnetic recording layer 2A and a lower high coercive force magnetic recording layer 2B. 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 medium consisting of an upper low coercive force magnetic recording layer 2A and a lower high coercive force magnetic recording layer 2B on the base material 1. In one embodiment, using a card having a recording layer 2, recording is performed 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 magnetic recording layer 2A and reading true information from the high magnetic recording layer 2B. Another embodiment is to provide the magnetic recording layer 2 with a collation track 4, for example, as shown by reference numeral 4 in FIG. Recording is performed by writing false information in the coercive magnetic recording layer 2A and information on the information track, and erases the information in the low coercive magnetic recording layer of the verification track to create a high coercive magnetic recording layer. 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 reading the information on the information track of the genuine card. [Function] In the first embodiment, even if false information is written in the low coercive force magnetic recording layer 2A after true information is written in the high coercive force magnetic recording layer 2B, the true information recording layer has no coercive force. Since it is high, it will not be affected by later 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, when the true information written in the high coercive force magnetic recording layer 2B is read after erasing the false information written in the low coercive force magnetic recording layer 2A, the true information recording layer is Since the coercive force is high, there is no fear that false information will be erased by the low coercive force erase current used to erase false information. If the above-mentioned information containing both true and false information is copied onto a card that has only a normal low coercive force magnetic recording layer, it is easy to tell that it is a fake because all the information will be erased by this erasure. 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. In this embodiment, the information only needs to be written in the low coercive force magnetic recording layer, and the card can be processed after checking the correspondence with the collation information, so that authenticity can be determined even more reliably.
本発明で「カード類」とは、キャッシュカードやクレジ
ッ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
気記録層への書き込み、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２
Ａのベタ印刷と高坑磁力磁気記録層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ってもよい。
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、高坑磁力磁気記録層２Ｂから真の情報を読みとっ
た債、いっ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ってもよいしくこの場合は、
偽の情報を消去するに先立ってバッフ７メモリに保存し
ておくことになる）、異なる情報であっも韮い。
このことは、第二の態様における照合用トラックに関し
ても、そのままあてはまる。
［実施例］
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。
酢酸セルロース樹脂（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部メチルアルコー
ル ２５部トルエン
２５部厚さ２５μのポリエステルの
ベースフィルム上に、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
「エスレックＢＸＪ （積水化学） ３部湿気
硬化型ウレタン樹脂 「オレスターＭ９５−５０Ａｊ
（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−Ｆｅ ２０３ （Ｈｃ ＝３０００ｅ ）
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 「サンブレンｌＢ１１４Ｂ
Ｊ （三洋化成工業） 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 ５（［Ｓ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
ＦＡＴマイチックＮＹ−２２０ＡＪ （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ィングし、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。
Ｂａ ０−６Ｆｅ ２０ （ＨＣ＝３００００８ ）
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ＶＡＧＨＪ （ＵＣＣ） ５
部ポリウレタンエラストマー樹脂 「サンブレンｌＢ１
１４ＢＪ （三洋化成工業＞ ４０部線状飽和
ポリエステル樹脂
「バイロンＲＶ５３ＳＳＪ （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
ＦＡＴマイチックＮＹ−２２０ＡＪ （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上に部分的にま
たは全面的にコーティングして、高坑磁力磁気記録層２
Ｂを形成した。
下記の原料を配合して、ホッ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
［デンカラック７２１Ｊ （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部上記のホットメルト接着剤
塗料を磁気記録層上に、グラビアコートし、厚さ１０μ
のホッ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６．５ｍ幅にスリッ
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、ベースフィルムであ
るポリエステルフィルムを剥離した。 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’Ｃ，２５ＫＦＪ／ｃｒＡの条件で加熱加圧
して積層し、仕上げ、打扱きを行ない、縦８６ｍ、幅５
４履、厚さ０．７６ｍ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、高坑
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１．高坑磁力磁
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層構造になっ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。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, the low coercive force magnetic recording layer 2
This is a combination of the solid printing of A and the solid printing of the high magnetic 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 effects of the above-described recording method of the present invention, it is necessary to use a bond from which true information has been read from the high coercive force magnetic recording layer 2B, and to the low coercive force magnetic recording layer 2A once erased.
It is preferable to write false information again and hide the true information. Needless to say, the false information you give again may be the same as the one you deleted earlier; in this case,
Before erasing the false information, it will be saved in the buffer 7 memory), but different information is also a problem. This also applies to the verification track in the second embodiment. [Example] 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 The above release material was gravure coated onto a polyester base film having a thickness of 25 μm to form a release layer having a thickness of 1 μm. Next, the following raw materials were blended to prepare a coating for a protective layer. Polyvinyl butyral resin "S-LEC BXJ (Sekisui Chemical) 3-part moisture-curing urethane resin "Orestar M95-50Aj
(Mitsui Toatsu) 3-part methyl ethyl ketone
30 parts toluene
30 parts ethyl acetate
30 parts of the above paint for a 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 203 (Hc = 3000e)
70 parts partially saponified vinyl chloride/vinyl acetate copolymer resin
VINYLITE vAGH” (UCC) 15 parts polyurethane elastomer resin “SUNBREN IB114B
J (Sanyo Chemical Industries) 30 parts Linear saturated polyester resin "Vylon Rv53SS" (Toyobo) 15 parts Isopropyl alcohol 5 ([S methyl ethyl ketone 50 parts Toluene
50 parts Isocyanate curing agent FAT Mytic NY-220AJ (Mitsubishi Kasei) 3 parts The above low coercive force magnetic paint was coated over 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. Ba0-6Fe20 (HC=300008)
70 parts partially saponified vinyl chloride/vinyl acetate copolymer resin “VINYLITE VAGHJ (UCC) 5
Polyurethane elastomer resin “Sunbren IB1”
14BJ (Sanyo Chemical Industries > 40 parts Linear saturated polyester resin "Vylon RV53SSJ (Toyobo > 20 parts Isopropyl alcohol 50 parts Methyl ethyl ketone 50 parts Toluene
50 parts Isocyanate curing agent FAT Mytic NY-220AJ (Mitsubishi Kasei) 3 parts The above high coercive force magnetic paint is coated partially or completely on the low coercive force magnetic recording layer 2A by gravure coating method. , high magnetic force magnetic recording layer 2
B was formed. A hot melt adhesive paint was prepared by blending the following raw materials. Vinyl chloride/vinyl acetate copolymer resin [Denkarac 721J (Electrochemical) 1 part acrylic resin 2 parts toluene
8 parts ethyl acetate
8 parts Gravure coat the above hot melt adhesive paint onto 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 m 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 stacked in this order on the oversheet with the magnetic recording layer prepared in this way, and Laminated by heating and pressurizing under certain conditions, finishing and clapping, the length is 86 m and the width is 5.
Four shoes and 0.76 m thick cards were obtained. In a card having a magnetic recording medium manufactured in this way, 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. For reading, erase false information from the low coercive force magnetic recording layer and perform 1. We were able to read the true information of the high magnetic field 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 In the card having the magnetic recording medium of the present invention, it is not obvious from the outside that the magnetic recording layer has a two-layer structure;
It is difficult to counterfeit. 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Ｉ−Ｉ方向の拡大断面図でおる。
１・・・基 材
２・・・磁気記録層
２Ａ・・・低抗磁力磁気記録層
２Ｂ・・・高坑磁力磁気記録層
３・・・保護層
４・・・照合用トラック
特許出願人 大日本印刷株式会社
代理人 弁理士 須 賀 総 夫
第１図
Ｉ−＋
第２図FIG. 1 is a plan view showing a portion of cards having the magnetic recording medium of the present invention. FIG. 2 is an enlarged sectional view taken along the line II in FIG. 1. 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 Patent applicant Dai Nippon Printing Co., Ltd. Representative Patent Attorney Souo Suga Figure 1 I-+ Figure 2
Claims (5)
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。(1) Cards having a magnetic recording layer 2 on a base material 1, characterized in that the magnetic recording layer 2 consists of an upper low coercive force magnetic recording layer 2A and a lower high coercive force magnetic recording layer 2B. Cards with magnetic recording media.
範囲第１項の磁気記録媒体をもつカード類。(2) Cards having a magnetic recording medium according to claim 1, which has a protective layer 3 on a magnetic recording layer 2.
層の高坑磁力磁気記録層２Ｂとからなる磁気記録層２を
有するカード類を用い、高坑磁力磁気記録層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って記録を行ない、低抗磁力磁
気記録層２Ａの偽の情報を消去して高坑磁力磁気記録層
２Ｂの真の情報をよむことによっ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
。(3) Using a card having a magnetic recording layer 2 consisting of an upper low coercive force magnetic recording layer 2A and a lower high coercive force magnetic recording layer 2B on the base material 1, the high coercive force magnetic recording layer 2B is Recording is performed by writing true information and false information in the low coercive force magnetic recording layer 2A, and by erasing the false information in the low coercive force magnetic recording layer 2A, the true information in the high coercive force magnetic recording layer 2B is recorded. A method for recording cards having a magnetic recording medium, which is characterized in that reading is performed by reading information.
Ａに再度偽の情報を書き込んで高坑磁力磁気記録層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。(4) After reading the true information, the low coercive force magnetic recording layer 2
Write false information in A again and create high magnetic force magnetic recording layer 2B.
3. A method for recording cards having a magnetic recording medium according to claim 3, which includes hiding the true information of.
層の高坑磁力磁気記録層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に照合用トラック
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
何らかの情報を書き込むとともに情報用トラックに情報
を書き込むことによつて記録を行ない、照合用トラック
４の低抗磁力磁気記録層の情報を消去して高坑磁力磁気
記録層の照合用情報を読んだ上で、情報用トラックの情
報を読むことによって読みとりを行なうこを特徴とする
磁気記録媒体をもつカード類の記録方法。(5) Using a card having a magnetic recording layer 2 consisting of an upper low coercive force magnetic recording layer 2A and a lower high coercive force magnetic recording layer 2B on the base material 1, the magnetic recording layer 2 has a verification track. 4, and after writing verification information in the high coercive force magnetic recording layer 2B, some information is written in the low coercive force magnetic recording layer 2A, and information is also written in the information track. After erasing the information on the low coercive force magnetic recording layer of the collation track 4 and reading the collation information on the high coercive force magnetic recording layer, reading is performed by reading the information on the information track. A recording method for cards having a characteristic 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 true JPS61145727A (en) | 1986-07-03 |
| JPH0533460B2 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) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6334727A (en) * | 1986-07-29 | 1988-02-15 | Tokyo Jiki Insatsu Kk | Magnetic recording medium and magnetic recording and reproducing device |
| JPS63209023A (en) * | 1987-02-26 | 1988-08-30 | Tokyo Jiki Insatsu Kk | Magnetic recording medium |
| JPS63153317U (en) * | 1987-03-26 | 1988-10-07 | ||
| JPH0210516A (en) * | 1988-06-29 | 1990-01-16 | Tomoegawa Paper Co Ltd | Magnetic recording medium and its manufacture |
| 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 |
| JPH0439097A (en) * | 1990-06-05 | 1992-02-10 | Tokin Corp | Card and method for discriminating genuineness of the same card |
| JP2002293067A (en) * | 2001-03-30 | 2002-10-09 | Dainippon Ink & Chem Inc | Magnetic recording medium |
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| JPS50147625A (en) * | 1974-05-16 | 1975-11-26 | ||
| 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 |
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| 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 | Preventing method for forgery of magnetic card |
| JPS6178362U (en) * | 1984-10-29 | 1986-05-26 | ||
| 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
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5085306A (en) * | 1973-10-31 | 1975-07-09 | ||
| JPS50147625A (en) * | 1974-05-16 | 1975-11-26 | ||
| 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 | Preventing method for forgery of magnetic card |
| JPS6178362U (en) * | 1984-10-29 | 1986-05-26 | ||
| JPH056246A (en) * | 1991-06-27 | 1993-01-14 | Nec Eng Ltd | Operation control system for automatic teller machine |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6334727A (en) * | 1986-07-29 | 1988-02-15 | Tokyo Jiki Insatsu Kk | Magnetic recording medium and magnetic recording and reproducing device |
| JPS63209023A (en) * | 1987-02-26 | 1988-08-30 | Tokyo Jiki Insatsu Kk | Magnetic recording medium |
| JPS63153317U (en) * | 1987-03-26 | 1988-10-07 | ||
| JPH0210516A (en) * | 1988-06-29 | 1990-01-16 | Tomoegawa Paper Co Ltd | Magnetic recording medium and its manufacture |
| 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 |
| JPH0439097A (en) * | 1990-06-05 | 1992-02-10 | Tokin Corp | Card and method for discriminating genuineness of the same card |
| JP2002293067A (en) * | 2001-03-30 | 2002-10-09 | Dainippon Ink & Chem Inc | Magnetic recording medium |
| WO2002080151A1 (en) * | 2001-03-30 | 2002-10-10 | Dainippon Ink And Chemicals, Inc. | Magnetic recording medium |
| US7344073B2 (en) | 2001-03-30 | 2008-03-18 | Dainippon Ink And Chemicals, Inc. | Magnetic recording medium |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0533460B2 (en) | 1993-05-19 |
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