JPH04240586A - Medium detector - Google Patents
Medium detectorInfo
- Publication number
- JPH04240586A JPH04240586A JP3006706A JP670691A JPH04240586A JP H04240586 A JPH04240586 A JP H04240586A JP 3006706 A JP3006706 A JP 3006706A JP 670691 A JP670691 A JP 670691A JP H04240586 A JPH04240586 A JP H04240586A
- Authority
- JP
- Japan
- Prior art keywords
- light
- medium
- vout
- receiving element
- soiling
- 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.)
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Links
- 238000001514 detection method Methods 0.000 claims abstract description 34
- 238000004140 cleaning Methods 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 16
- 239000000428 dust Substances 0.000 description 13
- 230000007423 decrease Effects 0.000 description 6
- 238000011017 operating method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 1
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- Geophysics And Detection Of Objects (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、媒体検知装置に関し、
特に紙葉、帳票、カード等の媒体を搬送する機器に用い
る媒体検知装置に関する。[Field of Industrial Application] The present invention relates to a medium detection device.
In particular, the present invention relates to a medium detection device used in equipment that conveys media such as paper sheets, forms, cards, etc.
【０００２】0002
【従来の技術】従来の媒体検知装置について図面を参照
して説明する。2. Description of the Related Art A conventional medium detection device will be explained with reference to the drawings.
【０００３】図５は従来例の媒体検知装置の構成および
媒体検知方式を示す図、図５（ａ）は各構成要素の配置
を示す図、図５（ｂ）はその媒体検知方式を示す回路図
、図５（ｃ）は媒体検知時の出力電圧を示す図、図６は
従来例の媒体検知装置の動作特性図である。FIG. 5 is a diagram showing the configuration and medium detection method of a conventional medium detection device, FIG. 5(a) is a diagram showing the arrangement of each component, and FIG. 5(b) is a circuit showing the medium detection method. 5(c) is a diagram showing the output voltage when detecting a medium, and FIG. 6 is a diagram showing the operating characteristics of a conventional medium detecting device.
【０００４】図５に示すように、従来の媒体検知装置は
、発光素子１と、受光素子２と、媒体３とで構成され、
その配置を図５（ａ）に示す。As shown in FIG. 5, the conventional medium detection device is composed of a light emitting element 1, a light receiving element 2, and a medium 3.
The arrangement is shown in FIG. 5(a).
【０００５】ここで、図５（ａ）に示すように、発光素
子１と、受光素子２を対応させ、媒体３が発光素子１と
受光素子２の間を横切ると、図５（ｂ），（ｃ）に示す
ように、受光素子２の出力電圧が低下し、スライスレベ
ルＶＳＬより小さくなることにより、媒体の有無を検知
する。Here, as shown in FIG. 5(a), when the light-emitting element 1 and the light-receiving element 2 are made to correspond, and the medium 3 crosses between the light-emitting element 1 and the light-receiving element 2, as shown in FIG. 5(b), As shown in (c), the output voltage of the light receiving element 2 decreases and becomes smaller than the slice level VSL, thereby detecting the presence or absence of the medium.
【０００６】図６は従来例の媒体検知装置の動作特性図
を示し、出力電圧がスライスレベルＶＳＬより小さくな
り、媒体検知が不可になると、図６に示すように媒体の
清掃が必要になる。FIG. 6 shows an operating characteristic diagram of a conventional medium detection device. When the output voltage becomes lower than the slice level VSL and medium detection becomes impossible, cleaning of the medium becomes necessary as shown in FIG.
【０００７】[0007]
【発明が解決しようとする課題】上述したように従来の
媒体検知装置によって紙幣等の紙葉を搬送する機器にお
いては、内部で紙粉が発生しやすいため、発光素子およ
び受光素子の表面に塵埃が付着しやすく、あるいは、印
刷インクが付着しやすくなる。そして、この塵埃または
インク等の汚れの付着量は時間の経過とともに大きくな
り、発光素子から受光素子にいたる光量は図６に示すよ
うに時間とともに小さくなる。[Problems to be Solved by the Invention] As mentioned above, in devices that use conventional medium detection devices to transport paper sheets such as banknotes, paper dust is likely to be generated internally, and therefore dust can be deposited on the surfaces of light emitting elements and light receiving elements. or printing ink. The amount of dust or dirt such as ink increases over time, and the amount of light from the light emitting element to the light receiving element decreases over time, as shown in FIG.
【０００８】従って、塵埃あるいは汚れの付着量が多く
なって受光素子の出力がスライスレルより小さくなった
場合には、汚れ等による出力の低下か、媒体による出力
低下かの区別ができず、媒体の検知ができなくなるため
、発光素子と受光素子を定期的に清掃する必要がある。Therefore, when the amount of attached dust or dirt increases and the output of the light-receiving element becomes smaller than the slice level, it is impossible to distinguish between the decrease in output due to dirt and the like and the decrease in output due to the medium. The light emitting element and the light receiving element must be cleaned regularly.
【０００９】ところが、従来の媒体検知装置では、この
清掃が必要となるまでの時間が短く、頻繁に清掃をしな
ければならないという欠点がある。However, the conventional medium detection device has the disadvantage that the time required for cleaning is short and that cleaning must be performed frequently.
【００１０】また、発光素子と受光素子の間の距離が大
きくなると、受光光量が小さくなり、媒体の検知に対応
できなくるという欠点がある。Furthermore, when the distance between the light emitting element and the light receiving element becomes large, the amount of light received decreases, and there is a drawback that it becomes impossible to detect the medium.
【００１１】本発明の目的は、上記の欠点を除去し、発
光素子および受光素子に対する塵埃あるいは汚れの付着
の程度に応じて発光光量およびスライスレベルを切り替
えて汚れの程度を判定し、適切な光量設定を行うことに
より、発光素子および受光素子の清掃までの時間を長く
することができ、また、受光素子と比較器の間に増幅器
を使用することにより、出力電圧の微小な変化を検出で
き、発光素子と受光素子の間の距離が大きく、受光光量
が小さくなった場合にも媒体の検知に対応できる媒体検
知装置を提供することにある。An object of the present invention is to eliminate the above-mentioned drawbacks, and determine the degree of dirt by switching the amount of emitted light and the slice level depending on the degree of dust or dirt adhering to the light emitting element and the light receiving element. By configuring the settings, it is possible to lengthen the time it takes to clean the light-emitting element and light-receiving element, and by using an amplifier between the light-receiving element and the comparator, minute changes in the output voltage can be detected. An object of the present invention is to provide a medium detection device capable of detecting a medium even when the distance between a light emitting element and a light receiving element is large and the amount of received light is small.
【００１２】0012
【課題を解決するための手段】第一の発明の媒体検知装
置は、紙葉、帳票、カード等の媒体の有無を検知する媒
体検知装置において、光を発光する発光素子と、その光
を受光する受光素子と、受光素子の出力電圧を基準電圧
と比較する比較器と、発光素子の発光光量を変える光量
変換手段と、基準電圧を切り替える電圧切替手段と、比
較器の比較結果をもとに光量変換手段により発光素子の
発光光量を設定し電圧切替手段により基準電圧を設定し
媒体の有無の判定を行う判断処理部とを有している。[Means for Solving the Problems] The medium detection device of the first invention detects the presence or absence of a medium such as a paper sheet, a form, a card, etc., which includes a light emitting element that emits light and a light emitting element that receives the light. a light-receiving element, a comparator that compares the output voltage of the light-receiving element with a reference voltage, a light amount conversion means that changes the amount of light emitted from the light-emitting element, a voltage switching means that changes the reference voltage, and a comparator that compares the output voltage of the light-receiving element with a reference voltage. The apparatus includes a determination processing section that sets the amount of light emitted from the light emitting element by means of a light amount conversion means, sets a reference voltage by means of a voltage switching means, and determines the presence or absence of a medium.
【００１３】第二の発明の媒体検知装置は、第一の発明
の媒体検知装置の受光素子と比較器との間に受光素子の
出力電圧を増幅する増幅器を有している。The medium detecting device of the second invention includes an amplifier for amplifying the output voltage of the light receiving device between the light receiving device of the medium detecting device of the first invention and the comparator.
【００１４】[0014]
【実施例】次に、本発明の実施例について図面を参照し
て説明する。Embodiments Next, embodiments of the present invention will be described with reference to the drawings.
【００１５】図１は第一の発明の一実施例の媒体検知装
置の構成および回路図である。FIG. 1 is a configuration and circuit diagram of a medium detection device according to an embodiment of the first invention.
【００１６】図１において、本実施例の媒体検知装置は
、発光素子１と、受光素子２と、媒体３と、比較器４と
、発光光量設定部５と、基準電圧設定部６と、判断処理
部７とから構成されている。In FIG. 1, the medium detection device of the present embodiment includes a light emitting element 1, a light receiving element 2, a medium 3, a comparator 4, a light emission amount setting section 5, a reference voltage setting section 6, and a judgment unit. It is composed of a processing section 7.
【００１７】ここで、発光素子１が光を発光し、受光素
子２で、その光を受光する。媒体３は発光素子１と受光
素子２の間を通過する。発光素子１と受光素子２の間に
媒体３が無いときは発光素子１から出た光は受光素子２
に受光され、負荷抵抗の両端に出力電圧を発生するが、
媒体３が有るときは、媒体３に遮られ、発光素子１から
発せられた光は受光素子２に達しないため、負荷抵抗の
両端には、出力電圧は発生しない。Here, the light emitting element 1 emits light, and the light receiving element 2 receives the light. The medium 3 passes between the light emitting element 1 and the light receiving element 2. When there is no medium 3 between the light emitting element 1 and the light receiving element 2, the light emitted from the light emitting element 1 is transferred to the light receiving element 2.
The light is received by the load resistor, and an output voltage is generated across the load resistor.
When the medium 3 is present, the light emitted from the light emitting element 1 is blocked by the medium 3 and does not reach the light receiving element 2, so that no output voltage is generated across the load resistor.
【００１８】判断処理部７は、負荷抵抗の両端に発生し
た出力電圧ＶＯＵＴと、スライスレベルＶＳＬを比較器
４で比較し、媒体の有無を判定する。また、判断処理部
７は、発光光量設定部５および基準電圧設定部６を制御
し、発光素子１および受光素子２への塵埃あるいは汚れ
の付着量に応じて発光光量およびスライスレベルを切り
替える。例えば、光量コントロール端子（光量ＣＯＮＴ
）にローレベルの電圧を与えると、トランジスタＴｒ１
がオフ状態となり、発光素子に流れる電流は小さくな
る。逆に、光量ＣＯＮＴにハイレベルの電圧を与えると
、トランジスタＴｒ１ がオン状態となり、実効的に発
光素子の回路抵抗が小さくなるため、流れる電流が大き
くなり、発光光量が大きくなる。また、スライスレベル
コントロール端子（スライスＣＯＮＴ）にローレベルの
電圧を与えると、トランジスタＴｒ２ がオフ状態とな
り、分圧抵抗が大きくなるため、スライスレベルが高く
なる。逆に、スライスＣＯＮＴにハイレベルの電圧を与
えると、トランジスタＴｒ２ がオン状態となり、実効
的に分圧抵抗が小さくなるため、スライスレベルが低く
なる。The determination processing unit 7 compares the output voltage VOUT generated across the load resistor with the slice level VSL using the comparator 4, and determines the presence or absence of a medium. Further, the determination processing section 7 controls the emitted light amount setting section 5 and the reference voltage setting section 6, and switches the emitted light amount and the slice level according to the amount of dust or dirt attached to the light emitting element 1 and the light receiving element 2. For example, the light amount control terminal (light amount CONT)
), when a low level voltage is applied to the transistor Tr1
is turned off, and the current flowing through the light emitting element becomes small. Conversely, when a high level voltage is applied to the light amount CONT, the transistor Tr1 is turned on and the circuit resistance of the light emitting element is effectively reduced, so that the flowing current increases and the amount of emitted light increases. Further, when a low level voltage is applied to the slice level control terminal (slice CONT), the transistor Tr2 is turned off, and the voltage dividing resistance increases, so that the slice level becomes high. Conversely, when a high-level voltage is applied to the slice CONT, the transistor Tr2 turns on, effectively reducing the voltage dividing resistance and lowering the slice level.
【００１９】なお、ここでは光量およびスライスレベル
の切り替えにトランジスタを用いる例について説明した
が、アナログスイッチなど他の手段を用いることも可能
である。Although an example in which transistors are used to switch the light amount and slice level has been described here, it is also possible to use other means such as an analog switch.
【００２０】図２は第一の発明の一実施例の運用手順を
示すフローチャートである。FIG. 2 is a flowchart showing the operating procedure of an embodiment of the first invention.
【００２１】図２の（１）〜（１３）の各ステップにお
いて、（１）光量およびスライスレベルを初期値とする
。In each step (1) to (13) in FIG. 2, (1) the light amount and slice level are set to initial values.
【００２２】（２）媒体無しの状態で出力電圧ＶＯＵＴ
がスライスレベルＶＳＬ１ より大きいかどうかを判
断する。(2) Output voltage VOUT without medium
is larger than the slice level VSL1.
【００２３】（３）（２）でＶＯＵＴ ＞ＶＳＬ１ で
あれば塵埃、汚れ付着が許容限界内であるので、スライ
スレベルを運用（媒体検知）時の値ＶＳＬ２ として運
用に入る。(3) If VOUT > VSL1 in (2), the dust and dirt adhesion is within the permissible limit, and therefore operation begins with the slice level set to the value VSL2 at the time of operation (medium detection).
【００２４】（４）（２）でＶＯＵＴ ≦ＶＳＬ１ で
あれば塵埃、汚れ付着が進んでいるので、光量を大きく
する。(4) If VOUT≦VSL1 in (2), the amount of light is increased because dust and dirt have been deposited.
【００２５】（５）次に、出力電圧ＶＯＵＴ がスライ
スレベルＶＳＬ１ より大きいかどうかを判断する。(5) Next, it is determined whether the output voltage VOUT is greater than the slice level VSL1.
【００２６】（６）（５）でＶＯＵＴ ＞ＶＳＬ１ で
あれば塵埃、汚れ付着が許容限界内であるので、スライ
スレベルを運用（媒体検知）時の値ＶＳＬ２ として運
用に入る。(6) If VOUT > VSL1 in (5), the dust and dirt adhesion is within the permissible limit, and therefore operation begins with the slice level set to the value VSL2 at the time of operation (medium detection).
【００２７】（７）（５）でＶＯＵＴ ≦ＶＳＬ１ で
あれば塵埃、汚れ付着が進んでいるので、許容限界内に
あるかどうかを判断するため、スライスレベルを運用時
の値ＶＳＬ２ 値に切り替える。(7) If VOUT ≦VSL1 in (5), dust and dirt have accumulated, so the slice level is switched to the operating value VSL2 in order to determine whether it is within the permissible limit.
【００２８】（８）出力電圧ＶＯＵＴ がスライスレベ
ルＶＳＬ２より大きいかどうかを判断する。(8) Determine whether the output voltage VOUT is greater than the slice level VSL2.
【００２９】（９）（８）でＶＯＵＴ ＞ＶＳＬ２ で
あれば塵埃、汚れ付着が許容限界内であるので、運用に
入る。(9) If VOUT > VSL2 in (8), the dust and dirt adhesion is within the permissible limit, and the system is put into operation.
【００３０】（１０）（８）でＶＯＵＴ ≦ＶＳＬ２
であれば塵埃、汚れ付着が許容限界を越えたと考えられ
るので、清掃を行う必要がある。(10) In (8), VOUT ≦VSL2
If so, it is considered that the dust and dirt adhesion has exceeded the permissible limit, and it is necessary to clean it.
【００３１】（１１）媒体有無を検知するため、出力電
圧ＶＯＵＴ とスライスレベルＶＳＬ２ を比較する。(11) To detect the presence or absence of a medium, the output voltage VOUT is compared with the slice level VSL2.
【００３２】（１２）（１１）でＶＯＵＴ ＞ＶＳＬ２
であれば媒体無し。(12) In (11), VOUT > VSL2
If so, there is no medium.
【００３３】（１３）（１１）でＶＯＵＴ ≦ＶＳＬ２
であれば媒体有り。(13) In (11), VOUT ≦VSL2
If so, there is a medium.
【００３４】図３は第一の発明の一実施例の媒体検知装
置の動作特性図である。FIG. 3 is an operational characteristic diagram of the medium detection device according to an embodiment of the first invention.
【００３５】図３において、媒体無しの時の出力電圧Ｖ
ＯＵＴ は時間経過とともに小さくなる。In FIG. 3, the output voltage V when there is no medium
OUT becomes smaller as time passes.
【００３６】時間ＴＡ で出力電圧ＶＯＵＴ がスライ
スレベルＶＳＬ１ より小さくなったとき、光量を大き
くすると、出力電圧ＶＯＵＴ はＡ′まで増加する。さ
らに、時間が経過すると、出力電圧ＶＯＵＴ が低下し
ていき、ＶＯＵＴ がスライスレベルＶＳＬ２ より小
さくなったら媒体検知ができなくなるので、清掃が必要
となる。When the output voltage VOUT becomes smaller than the slice level VSL1 at time TA, increasing the amount of light increases the output voltage VOUT to A'. Further, as time passes, the output voltage VOUT decreases, and when VOUT becomes smaller than the slice level VSL2, medium detection becomes impossible, and therefore cleaning is required.
【００３７】従って、本実施例では、時間ＴＣ までに
清掃を行えばよい、一方、従来の媒体検知装置では、時
間ＴＢ までに清掃を行う必要があるため、本実施例の
方が、清掃までの時間を（ＴＣ −ＴＢ ）だけ長くで
きる。Therefore, in this embodiment, it is only necessary to perform cleaning by time TC.On the other hand, in the conventional medium detection device, cleaning must be performed by time TB. The time can be increased by (TC - TB).
【００３８】図４は第二の発明の一実施例の媒体検知装
置の構成および回路図である。FIG. 4 is a configuration and circuit diagram of a medium detection device according to an embodiment of the second invention.
【００３９】図４に示すように、本実施例の媒体検知装
置は、発光素子１と、受光素子２と、媒体３と、比較器
４と、発光光量設定部５と、基準電圧設定部６と、判断
処理部７と、増幅器８とから構成され、受光素子２の出
力電圧を比較器４に入力する前に増幅器８で増幅してい
る。As shown in FIG. 4, the medium detection device of this embodiment includes a light emitting element 1, a light receiving element 2, a medium 3, a comparator 4, a light emission amount setting section 5, and a reference voltage setting section 6. The output voltage of the light receiving element 2 is amplified by the amplifier 8 before inputting it to the comparator 4.
【００４０】この場合は、第一の発明の一実施例に比べ
、増幅器８を使用したことにより、出力電圧の微小な変
化を検出できるので、発光素子１と受光素子２間の距離
が大きく、受光光量が小さくなった場合にも媒体の検知
に対応可能である。In this case, compared to the embodiment of the first invention, the use of the amplifier 8 makes it possible to detect minute changes in the output voltage, so the distance between the light emitting element 1 and the light receiving element 2 is large. It is possible to detect the medium even when the amount of received light is small.
【００４１】ここで、本実施例の運用手順および媒体検
知装置の動作特性は、基本的には第一の発明の一実施例
の運用手順および媒体検知装置の動作特性と同じである
。Here, the operating procedure and operating characteristics of the medium detecting device of this embodiment are basically the same as the operating procedure and operating characteristics of the medium detecting device of the embodiment of the first invention.
【００４２】尚、上記各実施例では、光量およびスライ
スレベルを各々２段階に切り替える例について説明した
が、３段階以上に切り替えることにより、さらに、清掃
までの時間を伸ばすことも可能となる。[0042] In each of the above embodiments, an example has been described in which the light amount and the slice level are each switched to two levels, but by switching to three or more levels, it is also possible to further extend the time until cleaning.
【００４３】[0043]
【発明の効果】以上説明したように、本発明の媒体検知
装置は、媒体の出入れによる発光素子および受光素子に
対する塵埃あるいは汚れの付着の程度に応じて発光光量
およびスライスレベルを切り替えて汚れの程度を判定し
、適切な光量設定を行うことにより、発光素子および受
光素子の清掃までの時間を長くすることができるという
効果がある。As explained above, the medium detection device of the present invention switches the amount of emitted light and the slice level according to the degree of dust or dirt adhering to the light emitting element and the light receiving element due to the loading and unloading of the medium. By determining the degree of damage and setting the appropriate amount of light, it is possible to lengthen the time required to clean the light emitting element and the light receiving element.
【００４４】また、受光素子と比較器の間に増幅器を使
用することにより、出力電圧の微小な変化を検出でき、
発光素子と受光素子の間の距離が大きく、受光光量が小
さくなった場合にも媒体の検知に対応できるという効果
がある。Furthermore, by using an amplifier between the light receiving element and the comparator, minute changes in the output voltage can be detected.
This has the advantage of being able to detect the medium even when the distance between the light emitting element and the light receiving element is large and the amount of received light is small.
【図１】本発明の第一の発明の一実施例の媒体検知装置
の構成および回路図である。FIG. 1 is a configuration and circuit diagram of a medium detection device according to an embodiment of the first invention of the present invention.
【図２】本発明の第一の発明の一実施例の運用手順を示
すフローチャートである。FIG. 2 is a flowchart showing the operational procedure of an embodiment of the first aspect of the present invention.
【図３】本発明の第一の発明の一実施例の媒体検知装置
の動作特性図である。FIG. 3 is an operational characteristic diagram of a medium detection device according to an embodiment of the first aspect of the present invention.
【図４】本発明の第二の発明の一実施例の媒体検知装置
の構成および回路図である。FIG. 4 is a configuration and circuit diagram of a medium detection device according to an embodiment of the second invention of the present invention.
【図５】従来例の媒体検知装置の構成および媒体検知方
式を示す図である。図５（ａ）は各構成要素の配置を示
す図である。図５（ｂ）はその媒体検知方式を示す回路
図である。図５（ｃ）は媒体検知時の出力電圧を示す図
である。FIG. 5 is a diagram showing the configuration and medium detection method of a conventional medium detection device. FIG. 5(a) is a diagram showing the arrangement of each component. FIG. 5(b) is a circuit diagram showing the medium detection method. FIG. 5(c) is a diagram showing the output voltage when medium is detected.
【図６】従来例の媒体検知装置の動作特性図である。FIG. 6 is an operational characteristic diagram of a conventional medium detection device.
１ 発光素子 ２ 受光素子 ３ 媒体 ４ 比較器 ５ 発光光量設定部 ６ 基準電圧設定部 ７ 判断処理部 ８ 増幅器 1 Light emitting element 2 Photo receiving element 3. Medium 4 Comparator 5 Light emission setting section 6 Reference voltage setting section 7 Judgment processing unit 8 Amplifier
Claims (2)
検知する媒体検知装置において、光を発光する発光素子
と、その光を受光する受光素子と、前記受光素子の出力
電圧を基準電圧と比較する比較器と、前記発光素子の発
光光量を変える光量変換手段と、前記基準電圧を切り替
える電圧切替手段と、前記比較器の比較結果をもとに前
記光量変換手段により前記発光素子の発光光量を設定し
前記電圧切替手段により前記基準電圧を設定し前記媒体
の有無の判定を行う判断処理部とを有することを特徴と
する媒体検知装置。1. A medium detection device for detecting the presence or absence of a medium such as a paper sheet, a form, a card, etc., comprising: a light emitting element that emits light; a light receiving element that receives the light; and an output voltage of the light receiving element being set to a reference voltage. a comparator for comparing the amount of light emitted by the light emitting element; a voltage switching means for switching the reference voltage; A medium detection device comprising: a determination processing section that sets a light amount, sets the reference voltage by the voltage switching means, and determines whether or not the medium is present.
、前記受光素子と前記比較器の間に前記受光素子の出力
電圧を増幅する増幅器を有することを特徴とする媒体検
知装置。2. The medium detection device according to claim 1, further comprising an amplifier for amplifying the output voltage of the light receiving element between the light receiving element and the comparator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3006706A JPH04240586A (en) | 1991-01-24 | 1991-01-24 | Medium detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3006706A JPH04240586A (en) | 1991-01-24 | 1991-01-24 | Medium detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04240586A true JPH04240586A (en) | 1992-08-27 |
Family
ID=11645750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3006706A Pending JPH04240586A (en) | 1991-01-24 | 1991-01-24 | Medium detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04240586A (en) |
-
1991
- 1991-01-24 JP JP3006706A patent/JPH04240586A/en active Pending
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