JPH027281A - Magnetically and optically identifiable label - Google Patents
Magnetically and optically identifiable labelInfo
- Publication number
- JPH027281A JPH027281A JP63156925A JP15692588A JPH027281A JP H027281 A JPH027281 A JP H027281A JP 63156925 A JP63156925 A JP 63156925A JP 15692588 A JP15692588 A JP 15692588A JP H027281 A JPH027281 A JP H027281A
- Authority
- JP
- Japan
- Prior art keywords
- recording layer
- label
- magnetic recording
- magnetic
- magnetically
- 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.)
- Pending
Links
- 239000010410 layer Substances 0.000 claims description 34
- 239000012790 adhesive layer Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 abstract description 5
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 abstract description 3
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052595 hematite Inorganic materials 0.000 abstract description 3
- 239000011019 hematite Substances 0.000 abstract description 3
- 238000007747 plating Methods 0.000 abstract 2
- 229920001577 copolymer Polymers 0.000 abstract 1
- 230000000007 visual effect Effects 0.000 abstract 1
- 239000011230 binding agent Substances 0.000 description 8
- 230000003287 optical effect Effects 0.000 description 7
- 239000006249 magnetic particle Substances 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229910052761 rare earth metal Inorganic materials 0.000 description 4
- 239000000696 magnetic material Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 235000010724 Wisteria floribunda Nutrition 0.000 description 1
- -1 and if necessary Polymers 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 125000002573 ethenylidene group Chemical group [*]=C=C([H])[H] 0.000 description 1
- 239000002223 garnet Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- SHXXPRJOPFJRHA-UHFFFAOYSA-K iron(iii) fluoride Chemical compound F[Fe](F)F SHXXPRJOPFJRHA-UHFFFAOYSA-K 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000013034 phenoxy resin Substances 0.000 description 1
- 229920006287 phenoxy resin Polymers 0.000 description 1
- 229920001228 polyisocyanate Polymers 0.000 description 1
- 239000005056 polyisocyanate Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000012463 white pigment Substances 0.000 description 1
Landscapes
- Credit Cards Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、磁気的光学的に識別可能な情報を保持でき、
相互に干渉することなく読みとる・ことができろ磁気的
光学的に識別可能なラベルに関する。[Detailed Description of the Invention] <Industrial Application Field> The present invention is capable of holding magnetically and optically identifiable information,
It relates to magnetically and optically distinguishable labels that can be read without mutual interference.
〈従来の技術〉
従来より、視覚で識別可能なラベルとして、ボールペン
、船筆等で筆記可能な紙の裏面に粘着層を設けた紙ラベ
ル等が知られている。<Prior Art> Conventionally, paper labels have been known as visually distinguishable labels, such as paper labels on which an adhesive layer is provided on the back side of paper that can be written on with a ballpoint pen, a boat pen, or the like.
しかし、筆記した文字等を機械により高速で識別するの
は困難であるため、機械により高速識別可能なラベルと
して、光学的バーフードや磁気ストライプなどを付した
ラベルが用いられるようになってきた。However, since it is difficult to identify handwritten characters at high speed by machines, labels with optical bar hoods, magnetic stripes, etc. have come to be used as labels that can be identified by machines at high speed.
〈発明が解決しようとする課題〉
しかしながら、例えば光学的バーコードや磁気ストライ
ブなどは、光学的バーコードリーグや磁気読取機などの
機械を使用しなければ識別することができないという問
題がある。<Problems to be Solved by the Invention> However, there is a problem in that, for example, optical barcodes and magnetic stripes cannot be identified without using a machine such as an optical barcode league or a magnetic reader.
また、スペースが限られているため、記録できる情報量
も限られるという問題がある。Furthermore, since the space is limited, there is a problem that the amount of information that can be recorded is also limited.
さらに、単一方式での記録では記録された情報の誤りあ
るいは識別の誤りが発見し難いという問題もある。Furthermore, recording using a single method has the problem that errors in recorded information or identification errors are difficult to detect.
本発明は、このような事情に艦み、多方式により記録で
きろようにして上述した問題を解決したラベルを提供す
ることを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances and aims to provide a label which can be recorded in multiple ways and which solves the above-mentioned problems.
く課題を解決するための手段〉
前記目的を達成する本発明にかかる磁気的光学的に識別
可能なラベルは、ラベル状ノ支持体の表面に、加筆性を
有する磁気記録層を設けたことを特徴とし、また、ラベ
ル状の支持体の表面に、可視光に対して実質的に透明で
ある磁気記録層を設けたことを特徴とし、さらに、ラベ
ル状の支持体の表面に、加筆性を有するとともに可視光
に対して実質的に透明である磁気記録層を設けたことを
特撮とする。Means for Solving the Problems> A magnetically and optically distinguishable label according to the present invention that achieves the above object is characterized in that a magnetic recording layer having writability is provided on the surface of a label-like support. It is also characterized in that a magnetic recording layer that is substantially transparent to visible light is provided on the surface of the label-shaped support. Special effects include a magnetic recording layer that is substantially transparent to visible light.
表面に加筆性の磁気記録層を有する第１のラベルは、磁
気的に識別できる情報を付すことができるとともに、ボ
ールペン、鉛筆、フェルトペン等の筆記具で筆記するこ
とによりあるいは印刷することにより視覚あるいは機械
により光学的に識別できろ情報を付すことができろ。The first label, which has a writable magnetic recording layer on its surface, can have magnetically identifiable information attached thereto, and can also be visually or It can be optically identified by a machine and information can be attached to it.
表面に透明な磁気記録層を有する第２のラベルは、ラベ
ル状の支持体の表面に例えば光学的バーコードを印刷等
すること′により光学的に識別できる情報を付すことが
できるとともに、磁気記録層に磁気的に識別できろ情報
を付すことができる。The second label, which has a transparent magnetic recording layer on its surface, can be provided with optically identifiable information by, for example, printing an optical barcode on the surface of the label-like support, and can also have a magnetic recording layer. The layer can be provided with magnetically distinguishable information.
また、表面に加筆性があり且つ透明な磁気記録層を有す
る第３のラベルは、磁気記録層に磁気的に識別できる情
報を付すことができるとともに、磁気記録層ｔζ筆記、
印刷等することによりあるいは支持体の表面に印刷等す
ることにより光学的に識別できる情報を付すことができ
る。Further, the third label having a transparent magnetic recording layer that is writable on the surface is capable of attaching information that can be magnetically identified to the magnetic recording layer, and also allows writing on the magnetic recording layer tζ.
Optically identifiable information can be added by printing or the like or by printing on the surface of the support.
本発明においてラベル状の支持体とは、所望の寸法、形
状に形成された紙や樹脂シート等をいい、その表面の色
は特に限定されない。In the present invention, the label-like support refers to paper, resin sheets, etc. formed into desired dimensions and shapes, and the color of its surface is not particularly limited.
しかし、上記第２．第３のラベルにおいては、支持体の
少なくとも表面が白色であると磁気記録層に筆記あるい
は印刷等した情報が識別され易くなり、また白色でなく
ても反射性のものとすれば光学的バーコードを付した場
合に識別し易くなる。また、この支持体は、裏面に粘着
層を有して種々の物品に貼付しうるものであれば好まし
いが、必ずしも粘着層を有してなくともよい。However, the above 2. For the third label, if at least the surface of the support is white, information written or printed on the magnetic recording layer can be easily identified, and even if it is not white, if it is reflective, it can be used as an optical barcode. It will be easier to identify if you add . Further, it is preferable that this support has an adhesive layer on the back surface so that it can be attached to various articles, but it does not necessarily need to have an adhesive layer.
本発明において、加筆性を有する磁気記録層とは、ボー
ルペン、Ｂ、フェルトペンなどにより加筆できる磁気記
録層をいい、例えば、加筆性を有するバインダーととも
に磁性粒子を塗布することにより形成される。In the present invention, the writable magnetic recording layer refers to a magnetic recording layer that can be writable with a ballpoint pen, B, felt-tip pen, etc., and is formed, for example, by applying magnetic particles together with a writable binder.
また、可視光に対して実質的に透明な磁気記録層とは、
少なくとも支持体の表面の色あるいは表面に印刷等され
た情報を識別できる程度に透明であるものをいい、無色
透明の他、染料等により着色されたものでもよい。Furthermore, a magnetic recording layer that is substantially transparent to visible light is
It refers to a support that is transparent to the extent that at least the color of the surface of the support or the information printed on the surface can be identified, and it may be colorless and transparent, or it may be colored with a dye or the like.
このような透明磁気記録層としては、例えば特公昭４２
−４５３９号公報に開示されているようにγ−へマタイ
トもしくはマグネタイト型酸化鉄であって平均粒子短径
が０．０７ｐｍ以下であるような磁性粒子を使用してな
るもの、あるいは特開昭５３−１０９６０４号公報に開
示されたもの、すなわち、平均幅が０．０６Ｅクロン以
下で針状比が２〜１０程度の針状磁性粒子を透明のバイ
ンダーに低充填率で実質的に均質に分散した塗液を塗膜
厚３ミクロン程度に塗布、乾燥したものなどが挙げられ
る。さらに、このようなバインダーが加筆性を有してい
れば透明で且つ加筆性のある磁気記録層を形成すること
ができる。さらこ、これら透明な磁気記録層は、透明性
を失わない程度に染料等を加えて着色してもよい。As such a transparent magnetic recording layer, for example,
As disclosed in Japanese Patent Publication No. 4539, magnetic particles made of γ-hematite or magnetite type iron oxide with an average particle minor axis of 0.07 pm or less, or JP-A No. 53 - What is disclosed in Japanese Patent No. 109604, that is, acicular magnetic particles having an average width of 0.06 Eron or less and an acicular ratio of about 2 to 10 are substantially homogeneously dispersed in a transparent binder at a low filling rate. Examples include those obtained by applying a coating liquid to a film thickness of about 3 microns and drying it. Furthermore, if such a binder has writability, a transparent and writable magnetic recording layer can be formed. Furthermore, these transparent magnetic recording layers may be colored by adding dyes or the like to an extent that the transparency is not lost.
本発明に用いられろバインダーとしては、塩化ビニル酢
酸ビニル共ｆｆｉ合体、セルロース系誘導体、フェノキ
シ樹脂、ビニリデン樹脂が挙げられ必要によってはウレ
タン樹脂および硬化剤としてのポリイソシアネートを加
えることができる。加筆性に関しては鉛筆等を使用する
場合にはスペーシング損失により大きな再生出力の低下
の発生しない程度に磁性層表面をマット化することによ
り得られ、水性インク等を使用する場合には磁性層中の
潤滑剤を減少させることにより加筆性を付与することが
できろ。油性インクを使用する場合には上記のバインダ
ーを使用した磁性層であれば加筆性について問題はない
。Examples of the binder used in the present invention include vinyl chloride/vinyl acetate co-ffi combination, cellulose derivatives, phenoxy resins, and vinylidene resins, and if necessary, urethane resins and polyisocyanates as curing agents can be added. When using a pencil, etc., the ability to write on the magnetic layer is achieved by matting the surface of the magnetic layer to the extent that there is no significant drop in playback output due to spacing loss, and when using water-based ink, the surface of the magnetic layer is matte. Writability can be imparted by reducing the amount of lubricant used. When oil-based ink is used, there is no problem with rewriting performance if the magnetic layer uses the above-mentioned binder.
さらに透明な磁気記録層を得るための磁性材料としては
希土類鉄ガーネット（Ｒ３Ｆ ｅ、０１２゜Ｒ：希土類
元素）、希土類オルソフェライト（ＲＦ ｅ Ｏ３：
Ｒ：希土類元素）、ＦｅＦ３あるいはＦｅＢＯ３等の透
明磁性材料を使用することもできろ。これらは粉末状と
してバインダー中に分散せしめ塗布して磁気記録層とし
てもよいし、薄膜状に形成せしめて磁気記録層とするこ
ともできる。Further, as magnetic materials for obtaining a transparent magnetic recording layer, rare earth iron garnet (R3F e, 012°R: rare earth element), rare earth orthoferrite (RF e O3:
Transparent magnetic materials such as R: rare earth element), FeF3, or FeBO3 may also be used. These may be dispersed in a binder in powder form and applied to form a magnetic recording layer, or may be formed into a thin film to form a magnetic recording layer.
なお、このように、透明なバインダーを用いて磁性粒子
を低充填率でｆ′！ｉ膜とした透明な磁気記録層は、通
常の手段での記録・再生では充分な再生出力が得にくい
ので、例えばギャップ幅が１０ミリメートルの磁気ヘッ
ドを用いるなどすることにより実質上充分な再生出力を
得ることができろ。In addition, in this way, using a transparent binder, magnetic particles are packed at a low filling rate f'! Since it is difficult to obtain a sufficient reproduction output from the transparent magnetic recording layer made of an i-film by normal recording and reproduction methods, it is possible to obtain a substantially sufficient reproduction output by using, for example, a magnetic head with a gap width of 10 mm. You can get it.
本発明にかかるラベルは、磁気的に識別できろ情報、例
えば磁気的バーコー゛ドとともに、視覚あるいは光学機
械で光学的に識別できろ情報、例えば手書き文字あるい
は光学的バーコードとを付することができるが、これら
三方式により付される情報（よ、全く同様の情報として
もよいし、全く異なる情報としてもよい。同じ情報を三
方式で記録した場合には、識別精度を向上させることが
でき、また、別情報を三方式で記録した場合には情報量
の増大すなわち検索の多面化を図ることができる。The label according to the invention may be provided with magnetically distinguishable information, for example a magnetic barcode, as well as visually or opto-mechanically distinguishable information, for example handwritten text or an optical barcode. However, the information attached by these three methods (may be the same information or completely different information.If the same information is recorded using the three methods, the identification accuracy can be improved. Furthermore, if separate information is recorded in three ways, the amount of information can be increased, that is, the search can be made more versatile.
さらに、支持体あるいは磁気記録層に着色した場合には
、この色によりラベルを分類することもできる。なお、
ボールペン・鉛筆等でかかれた文字等は非磁性物質なの
で、磁化された部分と相互に干渉することはない。Furthermore, if the support or magnetic recording layer is colored, the labels can be classified based on this color. In addition,
Characters drawn with ballpoint pens, pencils, etc. are made of non-magnetic material, so they do not interfere with magnetized parts.
く実 施 例〉 以下、本発明の好適な一実施例について説明する。Example of implementation A preferred embodiment of the present invention will be described below.
第１図に示すように、酸化チタン等の白色顔料を混入さ
せて白色とした樹脂製のシート状の支持体１の表面に加
筆性を有する透明な磁気記録層が形成されている。この
磁気記録層２は、平均幅が０．０６Ｚクロン以下で針状
比が２〜１０程度の針状磁性粒子γ−へマタイトを、透
明で且つ加筆性のあるバインダーである塩化ビニル酢酸
ビニル共重合体に低充填率３％（体積）で実質に均質に
分散して塗液を調製し、この塗液を支持体１の表面に３
ミクロンの厚さで塗布、乾燥することにより形成した。As shown in FIG. 1, a transparent magnetic recording layer having writability is formed on the surface of a sheet-like support 1 made of resin and made white by mixing a white pigment such as titanium oxide. This magnetic recording layer 2 is made of acicular magnetic particles γ-hematite with an average width of 0.06 Z croms or less and an acicular ratio of about 2 to 10, together with vinyl chloride and vinyl acetate as a transparent and writable binder. A coating liquid is prepared by substantially homogeneously dispersing the polymer at a low filling rate of 3% (volume), and this coating liquid is applied to the surface of the support 1 for 30 minutes.
It was formed by coating and drying to a thickness of microns.
また、支持体１の裏面には粘着層３が形成されている。Further, an adhesive layer 3 is formed on the back surface of the support 1.
このようなラベルに、１０ミリメートル幅の磁気ヘッド
で磁気的バーコードを記録、再生したところ、実用上充
分なデジタル信号の再生出力を得ることができた。When a magnetic barcode was recorded and reproduced on such a label using a 10 mm wide magnetic head, it was possible to obtain a reproduction output of a digital signal sufficient for practical use.
さらに、ボールペン等で磁性記録層２の表面に文字を書
くことができた。また、磁性記録層２に光学的バーコー
ドライターでバーコードを記録したところ、良好に記録
でき、さらに、バーコードリーダーで良好に読みとるこ
とができた。Furthermore, characters could be written on the surface of the magnetic recording layer 2 with a ballpoint pen or the like. Further, when a barcode was recorded on the magnetic recording layer 2 with an optical barcode writer, it was successfully recorded and furthermore, it was able to be read satisfactorily with a barcode reader.
〈発明の効果〉
以上説明したように、本発明の磁気的光学的に識別可能
なラベルは、磁気的（こ識別できろ情報とともに光学的
に識別できる情報を重畳して付することができ、且つ相
互に干渉することなく識別できるので、識別精度を向上
させたり、多面的検索をすることが可能とな、<Effects of the Invention> As explained above, the magnetically and optically distinguishable label of the present invention can be attached with optically distinguishable information superimposed on magnetically distinguishable information. In addition, since it can be identified without mutual interference, it is possible to improve identification accuracy and perform multifaceted searches.
第１図は本発明の実施例にかかるラベルの縦断面図であ
る。
図 面 中、
１は支持体、
２は磁気記録層、
３は粘着層である。
特 許 出 願 人
富士写真フィルム株式会社
代 理 人FIG. 1 is a longitudinal sectional view of a label according to an embodiment of the present invention. In the drawing, 1 is a support, 2 is a magnetic recording layer, and 3 is an adhesive layer. Patent application Agent: Fuji Photo Film Co., Ltd.
Claims (5)
記録層を設けたことを特徴とする磁気的光学的に識別可
能なラベル。(1) A magnetically and optically distinguishable label, characterized in that a magnetic recording layer having writability is provided on the surface of a label-shaped support.
的に透明である磁気記録層を設けたことを特徴とする磁
気的光学的に識別可能なラベル。(2) A magnetically and optically distinguishable label, characterized in that a magnetic recording layer that is substantially transparent to visible light is provided on the surface of a label-shaped support.
もに可視光に対して実質的に透明である磁気記録層を設
けたことを特徴とする磁気的光学的に識別可能なラベル
。(3) A magnetically and optically distinguishable label, characterized in that a magnetic recording layer that has writability and is substantially transparent to visible light is provided on the surface of a label-like support.
の支持体の少なくとも表面が白色であることを特徴とす
る磁気的光学的に識別可能なラベル。(4) The label according to claim 2 or 3, wherein at least the surface of the label-like support is white.
ラベル状の支持体がその裏面に粘着層を有している、磁
気的光学的に識別可能なラベル。(5) In the label according to any one of claims 1 to 4,
A magnetically and optically distinguishable label in which a label-like support has an adhesive layer on its back side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63156925A JPH027281A (en) | 1988-06-27 | 1988-06-27 | Magnetically and optically identifiable label |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63156925A JPH027281A (en) | 1988-06-27 | 1988-06-27 | Magnetically and optically identifiable label |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH027281A true JPH027281A (en) | 1990-01-11 |
Family
ID=15638370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63156925A Pending JPH027281A (en) | 1988-06-27 | 1988-06-27 | Magnetically and optically identifiable label |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH027281A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013237173A (en) * | 2012-05-14 | 2013-11-28 | Toppan Printing Co Ltd | Display body having magnetically-induced image and color shift effect, and method of manufacturing the same |
-
1988
- 1988-06-27 JP JP63156925A patent/JPH027281A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013237173A (en) * | 2012-05-14 | 2013-11-28 | Toppan Printing Co Ltd | Display body having magnetically-induced image and color shift effect, and method of manufacturing the same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100525849B1 (en) | Reversible display label for recording media, recording media and recording media case | |
| US6776438B2 (en) | Magnetic printing media for inkjet and laserjet | |
| DE69526066D1 (en) | OPTICAL RECORDING MEDIUM AND METHOD FOR THE PRODUCTION THEREOF | |
| JPH027281A (en) | Magnetically and optically identifiable label | |
| US7283150B2 (en) | Flexible media magnetic printing system | |
| JP2980419B2 (en) | Magnetic display media | |
| JP2593362Y2 (en) | Thermal transfer recording medium | |
| JP3160589B2 (en) | Magnetic display media | |
| JPH073519Y2 (en) | Disc cartridge | |
| JP3374225B2 (en) | Magnetic card with display | |
| JPH08118854A (en) | Magnetic card | |
| JP3116207B2 (en) | Visible magnetic card | |
| JPH11296914A (en) | Optical card | |
| JP2001023162A (en) | Manufacture of magnetic tape, method for indicating boundary of magnetic tape of predetermined length, and magnetic tape | |
| JPH0780377B2 (en) | Optical information recording carrier | |
| JPS6386175A (en) | Optical recording medium | |
| JPS6320741A (en) | optical card record carrier | |
| JPH09274461A (en) | Magnetic display card | |
| JPH10143850A (en) | Magnetic recording media | |
| JPS63283998A (en) | Electronic blackboard | |
| JP2000268346A (en) | Magnetic recording medium and method of manufacturing the same | |
| JPH07287537A (en) | Visible magnetic recording medium | |
| JPH06312592A (en) | Magnetic recording sheet and recording method thereof | |
| JPH09231553A (en) | Card with magnetic display | |
| JPS61269281A (en) | Displaying method for visible magnetic card |