JPS6226810Y2 - - Google Patents
Info
- Publication number
- JPS6226810Y2 JPS6226810Y2 JP14564078U JP14564078U JPS6226810Y2 JP S6226810 Y2 JPS6226810 Y2 JP S6226810Y2 JP 14564078 U JP14564078 U JP 14564078U JP 14564078 U JP14564078 U JP 14564078U JP S6226810 Y2 JPS6226810 Y2 JP S6226810Y2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic card
- magnetic
- heating
- reading device
- card reading
- 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
Links
- 238000010438 heat treatment Methods 0.000 claims description 17
- 230000002411 adverse Effects 0.000 claims description 2
- 229920001971 elastomer Polymers 0.000 claims 1
- 229920002379 silicone rubber Polymers 0.000 claims 1
- 239000004945 silicone rubber Substances 0.000 claims 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 7
- 229910000423 chromium oxide Inorganic materials 0.000 description 7
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 239000000696 magnetic material Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
Landscapes
- Digital Magnetic Recording (AREA)
- Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
Description
本考案は、現金自動支払い装置、鉄道の自動改
札等に用いられている磁気カード読取り装置に関
するものである。
従来の磁気カード読取り装置は、一定範囲の出
力を有する磁気カードを読み取る機能を持つてい
る。これは、磁気カードの磁気記録層に使用され
る材料および構成は、一定範囲の出力を発生する
ものであればどのようなものでも支障なく読み取
つてしまうことを意味している。現在、磁気カー
ドに使用されている磁性材料は酸化鉄である。し
かしながら、従来の磁気カード読取り装置は磁性
材料として酸化クロム等、他の材料で偽造された
カードでも正規のものとして読み取つてしまう。
酸化クロムはキユーリー点が120℃付近と低い
ため熱磁気転写により容易に酸化鉄を磁性材料と
した磁気カードに記録された信号を写し取ること
ができる。このようにして複製（偽造）された磁
気カードは、従来の磁気カード読取り装置では判
別することができず、正しいカードとして読み取
つてしまう。
本考案の目的は、上述したような点にかんがみ
て、規格外の磁気カードを判別しうるような機能
を有する磁気カード読取り装置を提供することで
ある。
本考案によれば、磁気カード読取り装置におい
て、磁気カードの送り方向において読取り磁気ヘ
ツドの手前に、磁気カードの記録部を所定温度ま
で加熱する加熱装置が設けられる。
次に、添付図面に基づいて、本考案の実施例に
ついて本考案を詳細に説明する。
第１図は、本考案の磁気カード読取り装置の原
理を概略的に示している。通常の磁気カード読取
り装置におけるように、磁気カード５は、カード
搬送ローラ２Ａおよび２Ｂによつて、圧着ロール
３と読取り磁気ヘツド４との間を通して矢印Ａの
送り方向へ走行せしめられていく。この時、本考
案によつて、磁気ヘツド４の手前に設けられた加
熱装置としての加熱ロールの間をも通される。す
なわち、磁気カード５は加熱ロール１を通過した
後、読取り磁気ヘツド４へ搬送されることにな
る。このとき、加熱ロール１は酸化クロムのキユ
ーリー点以上に加熱されているため、磁性材料に
酸化クロムを使用したカードでは、加熱ロール１
を通過する時、記録された信号は消去されてしま
い、読取り磁気ヘツド４には出力が検出されな
い。
加熱ロール１の温度は、酸化クロムのキユーリ
ー点である120℃（特殊な級には180℃のものもあ
る。）以上に磁気記録部を加熱できるよう設定す
れば良い。たゞし、磁気カードは一般にプラスチ
ツクの基体が使用されるため、高い温度をかける
訳にはいかない場合が多い。例えば、磁気カード
の基体に塩化ビニルを使用した場合は、瞬間的な
100℃程度迄の加熱に止めなければならない。一
方、第３図に例示するように、100℃に加熱する
と、酸化クロム媒体の出力は1/10程度に低下し、
一般には読取り磁気ヘツドにて出力として読み取
ることはできなくなる。また、完全に消去したい
場合は、加熱装置の付近に、消去磁界を与えるよ
うな磁極を付加すればよい。例えば、酸化クロム
は、第２図に示すように、100℃に加熱すると保
磁力（Hc）が150Oeに低下する。この時、外部
から150Oeの消去磁界をかければ記録された信号
は完全に消去されることになる。
第４図は、一般の磁気カードの印加直流消去磁
界と出力レベル減衰率との関係を例示しているも
ので、これから明らかなように、150Oeの磁界
は、一般の現金自動支払機用磁気カード等の記録
信号には悪影響を与えることはない。
以下に実施例を記す。
実施例 １
The present invention relates to a magnetic card reader used in automatic teller machines, automatic ticket gates in railways, and the like. Conventional magnetic card readers have the ability to read magnetic cards having a certain range of output power. This means that any material and structure used for the magnetic recording layer of a magnetic card that generates a certain range of output can be read without any problem. Currently, the magnetic material used in magnetic cards is iron oxide. However, conventional magnetic card reading devices read cards that are counterfeited using other magnetic materials, such as chromium oxide, as genuine. Since chromium oxide has a low Curie point of around 120°C, signals recorded on magnetic cards made of iron oxide can be easily copied using thermomagnetic transfer. A magnetic card that has been duplicated (counterfeited) in this way cannot be recognized by a conventional magnetic card reader and is read as a valid card. SUMMARY OF THE INVENTION In view of the above-mentioned points, an object of the present invention is to provide a magnetic card reader having a function capable of identifying non-standard magnetic cards. According to the present invention, in a magnetic card reading device, a heating device for heating the recording portion of the magnetic card to a predetermined temperature is provided in front of the reading magnetic head in the feeding direction of the magnetic card. Next, the present invention will be described in detail with regard to embodiments of the present invention based on the accompanying drawings. FIG. 1 schematically shows the principle of the magnetic card reading device of the present invention. As in a conventional magnetic card reader, the magnetic card 5 is moved in the feeding direction of arrow A between the pressure roll 3 and the reading magnetic head 4 by card transport rollers 2A and 2B. At this time, according to the present invention, the magnetic head 4 is also passed between heating rolls as a heating device provided in front of the magnetic head 4. That is, after the magnetic card 5 passes through the heating roll 1, it is conveyed to the reading magnetic head 4. At this time, the heating roll 1 is heated above the Curie point of chromium oxide, so in a card using chromium oxide as a magnetic material, the heating roll 1
, the recorded signal is erased and no output is detected by the read magnetic head 4. The temperature of the heating roll 1 may be set so as to heat the magnetic recording section to a temperature higher than 120°C (180°C in some special grades), which is the Curie point of chromium oxide. However, since magnetic cards generally have plastic bases, it is often impossible to subject them to high temperatures. For example, if vinyl chloride is used for the base of a magnetic card, instantaneous
It is necessary to limit the heating to about 100℃. On the other hand, as illustrated in Figure 3, when heated to 100°C, the output of the chromium oxide medium decreases to about 1/10,
In general, it will no longer be possible to read it as an output with a read magnetic head. If you want to erase completely, you can add a magnetic pole near the heating device that applies an erasing magnetic field. For example, as shown in Figure 2, when chromium oxide is heated to 100°C, the coercive force (Hc) decreases to 150 Oe. At this time, if an erasing magnetic field of 150 Oe is applied externally, the recorded signal will be completely erased. Figure 4 illustrates the relationship between the applied DC erase magnetic field and the output level attenuation rate for a general magnetic card.As is clear from this, a magnetic field of 150 Oe It will not have any adverse effect on the recorded signals. Examples are described below. Example 1
【表】
２
[Table] 2
Claims (1)
ツドの手前に、磁気カードの記録部を所定温度
まで加熱する加熱装置を備えていることを特徴
とする磁気カード読取り装置。 (2) 前記所定温度は、正規の磁気カードの記録部
に記録されている信号には実質的影響を与えな
いが規格外の磁気カードの記録部に記録されて
いる信号を消去または減衰させ、しかも、磁気
カードの基体に悪影響を与えない温度である実
用新案登録請求の範囲第(1)項記載の磁気カード
読取り装置。 (3) 前記加熱装置の付近に、消去用磁場を発生さ
せる機構を含む実用新案登録請求の範囲第(1)項
または第(2)項記載の磁気カード読取り装置。 (4) 前記加熱装置は、加熱ロールである実用新案
登録請求の範囲第(1)項または第(2)項または第(3)
項記載の磁気カード読取り装置。 (5) 前記加熱ロールは、シリコンゴムで形成され
ている実用新案登録請求の範囲第(4)項記載の磁
気カード読取り装置。 (6) 前記加熱装置は、ゴム磁石で形成された加熱
ロールである実用新案登録請求の範囲第(3)項記
載の磁気カード読取り装置。[Claims for Utility Model Registration] (1) A magnetic card reading device characterized by being equipped with a heating device that heats the recording section of a magnetic card to a predetermined temperature in front of a reading magnetic head in the feeding direction of the magnetic card. . (2) The predetermined temperature does not substantially affect the signals recorded in the recording section of a regular magnetic card, but erases or attenuates the signals recorded in the recording section of a non-standard magnetic card, Moreover, the magnetic card reading device according to claim (1) of the utility model registration has a temperature that does not adversely affect the base of the magnetic card. (3) The magnetic card reading device according to claim 1 or 2, which includes a mechanism for generating an erasing magnetic field in the vicinity of the heating device. (4) The heating device is a heating roll in claim (1) or (2) or (3) of the utility model registration claim.
The magnetic card reader described in Section 1. (5) The magnetic card reading device according to claim (4), wherein the heating roll is made of silicone rubber. (6) The magnetic card reading device according to claim (3), wherein the heating device is a heating roll made of a rubber magnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14564078U JPS6226810Y2 (en) | 1978-10-23 | 1978-10-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14564078U JPS6226810Y2 (en) | 1978-10-23 | 1978-10-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5561823U JPS5561823U (en) | 1980-04-26 |
| JPS6226810Y2 true JPS6226810Y2 (en) | 1987-07-09 |
Family
ID=29125390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14564078U Expired JPS6226810Y2 (en) | 1978-10-23 | 1978-10-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6226810Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000031684A1 (en) * | 1998-11-19 | 2000-06-02 | Kabushiki Kaisha Sankyo Seiki Seisakusho | Method of measuring coercive force of a magnetic card |
-
1978
- 1978-10-23 JP JP14564078U patent/JPS6226810Y2/ja not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000031684A1 (en) * | 1998-11-19 | 2000-06-02 | Kabushiki Kaisha Sankyo Seiki Seisakusho | Method of measuring coercive force of a magnetic card |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5561823U (en) | 1980-04-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0428779B2 (en) | Unit for sensing magnetic codes | |
| US3566356A (en) | Magnetic recording document and method | |
| US4114029A (en) | Magnetic recording | |
| JPS6226810Y2 (en) | ||
| US4104513A (en) | Magnetic recording | |
| KR880014493A (en) | Magnetic card and processing unit | |
| JP2820844B2 (en) | How to prevent unauthorized use of magnetic cards | |
| US4197989A (en) | Magnetic recording | |
| JPS61145727A (en) | Cards having magnetic recording medium and its recording method | |
| EP0815541B1 (en) | Security system for documents with a magnetic track for recording information | |
| JPS62145585A (en) | Magnetic information recording card | |
| JP2829422B2 (en) | Magnetic card | |
| JPH0692078A (en) | Cubic magnetic record card | |
| JPS5847530Y2 (en) | magnetic recording medium | |
| JPH0692072A (en) | Magnetic recording card | |
| JP3022749B2 (en) | Manufacturing method of magnetic recording medium | |
| JPH0369016A (en) | Magnetic card and magnetic recording and erasing method for this card | |
| JPH01216892A (en) | Magnetic card | |
| JP3040111U (en) | Magnetic recording media | |
| JP2832578B2 (en) | Manufacturing method of magnetic recording medium | |
| JPS589309Y2 (en) | magnetic card reader | |
| GB1499238A (en) | Magnetisable identification cards | |
| JPH05262077A (en) | Magnetic card and method for preventing it from being used illeregally | |
| JP2002029184A (en) | Forgery preventing identifier and method for deciding its truth or falsehood | |
| JPS6334727A (en) | Magnetic recording medium and magnetic recording and reproducing device |