JP4715399B2 - Confidential information concealment seal, information description document, confidential information reader, and confidential information reading method - Google Patents

Confidential information concealment seal, information description document, confidential information reader, and confidential information reading method Download PDF

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JP4715399B2
JP4715399B2 JP2005250930A JP2005250930A JP4715399B2 JP 4715399 B2 JP4715399 B2 JP 4715399B2 JP 2005250930 A JP2005250930 A JP 2005250930A JP 2005250930 A JP2005250930 A JP 2005250930A JP 4715399 B2 JP4715399 B2 JP 4715399B2
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infrared light
confidential information
seal
concealment
concealment seal
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JP2007065266A (en
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国雄 大村
敏文 今井
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Toppan Inc
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本発明は、郵送用申込み用紙等の伝票類や葉書類等の書類に記録（記載）した情報の機密性を保持するための機密情報隠蔽シール及び機密情報読取装置及び機密情報読取方法に関する。   The present invention relates to a confidential information concealment seal, a confidential information reading apparatus, and a confidential information reading method for maintaining the confidentiality of information recorded (described) in a slip such as a mail application form or a document such as a leaf document.

従来より、申し込み者が、申込み受付者に対して、郵送用申込み用紙等の伝票類や葉書類等の書類を用いて所定の申込みを行う際に、申込み受付者への書類送達時まで、その書類に記載した情報の機密性を保持してその情報を隠蔽して見ることができないようにするセキュリティ技術がある。   Conventionally, when an applicant makes a predetermined application to the application receptionist using a slip such as a mail application form or a paper document, until the document is delivered to the application receptionist, There is a security technology that keeps the confidentiality of information described in a document so that the information cannot be concealed.

このセキュリティ技術によれば、まず申し込み者が赤外光吸収性材料による複写用カーボンシートとポールペン等とを用いて、あるいは赤外光吸収性インキ（カーボンインキ等）による筆記ペン等の筆記用具、あるいは鉛筆、シャープペンシルの芯等を用いて、当該書類の機密情報記載領域に隠蔽情報を記載する。そして、この機密情報記載領域に隠蔽シールを、その裏面の粘着性接着剤層（剥離可能であって再接着不可）を介して貼着する。   According to this security technology, the applicant first uses a carbon sheet for copying with an infrared light absorbing material and a pole pen, or a writing instrument such as a writing pen with infrared light absorbing ink (carbon ink, etc.), Alternatively, the concealment information is described in the confidential information description area of the document using a pencil, a mechanical pencil lead, or the like. And a concealment seal is stuck to this confidential information description area via the adhesive adhesive layer (it can peel and cannot re-adhere) of the back.

この隠蔽シールは、紙基材シートに、可視光不透過性であって赤外光透過性の隠蔽性インキを塗布または印刷して構成されたもので、この隠蔽シールを貼着された機密情報記載領域においては、赤外光（赤外光照明方式の自動読取装置）によって、その機密情報を読み取ることはできるが、肉眼によっては読み取ることはできない。   This concealment seal is formed by applying or printing a concealing ink that is opaque to visible light and infrared light on a paper base sheet. Confidential information to which this concealment seal is affixed In the described area, the confidential information can be read by infrared light (infrared light illumination type automatic reader), but cannot be read by the naked eye.

しかしながら、上記の申込み用紙における隠蔽シールが貼着されない機密を要しない記載領域に記載された記載事項（通常情報）を筆記した赤外光吸収性の記録材料や、インキや、捺印用の朱肉などでは、赤外光を吸収しないものが有り、可視光照明方式の自動読取装置や、肉眼等では、読み取りや解読ができるものの、赤外光照明方式の自動読取装置では、記載事項の一部に、赤外光を吸収しない部分があるために、全体の記載事項のうちの一部が読み取れないという問題があった。   However, an infrared light-absorbing recording material written in the description area (usual information) written in the non-confidential description area where the concealment seal is not affixed on the above application form, ink, vermilion for stamping, etc. However, there are some that do not absorb infrared light, and they can be read and decoded by visible light illumination automatic readers and the naked eye, but infrared light illumination automatic readers are part of the description. Since there is a portion that does not absorb infrared light, there is a problem that some of the entire description items cannot be read.

以下に、本発明に関連する赤外光吸収性材料やインキを構成する赤外光吸収性組成物に関する公知の特許文献を記載する。
特開平６−１０７９８５号公報 特開平７−０７０４９６号公報 特開平８−２１６５１８号公報 Below, the well-known patent document regarding the infrared-light absorptive composition which comprises the infrared-light absorptive material and ink relevant to this invention is described.
JP-A-6-107985 JP-A-7-070496 JP-A-8-216518

本発明の課題は、書類に記載した情報の機密性を保持するための隠蔽シールを改良することにより、その情報を肉眼では読み取りできないようにするとともに、赤外線カメラや赤外光照明方式の自動読取装置でも、書類の記載領域に記載した機密情報を簡単に読み取ることを不可能とすることにあり、書類に記載された機密情報を確実に隠蔽できるようにすることにある。   The object of the present invention is to improve the concealment seal for maintaining the confidentiality of the information described in the document so that the information cannot be read with the naked eye, and is automatically read by an infrared camera or infrared light illumination system. Also in the apparatus, it is impossible to easily read the confidential information described in the document description area, and the confidential information described in the document can be surely concealed.

本発明の請求項１に係る発明は、少なくとも可視光不透過性であって赤外光透過性の基材シート１の一面に、温度ｔ２にて１秒間未満の熱エネルギーの付加の後に室温ｔ０（ｔ０＜ｔ２）まで急冷することにより赤外光吸収状態を呈し、温度ｔ１（ｔ１＜ｔ２）にて１秒間以上の熱エネルギーの付加の後に室温ｔ０（ｔ０＜ｔ１＜ｔ２）まで徐冷することにより赤外光透過状態を呈し、ロイコ化合物を含有する赤外光吸収透過性層２を設けたことを特徴とする機密情報隠蔽シールである。 Invention, on one side of the IR transmission of the substrate sheet 1 and at least visible light impermeable at room temperature after the addition of the thermal energy of less than one second at a temperature t 2 according to a first aspect of the present invention By rapidly cooling to t 0 (t 0 <t 2 ), an infrared light absorption state is exhibited, and after addition of thermal energy for 1 second or more at temperature t 1 (t 1 <t 2 ), room temperature t 0 (t 0 It is a confidential information concealment seal that is provided with an infrared light absorbing / transmitting layer 2 that exhibits an infrared light transmitting state by being gradually cooled to <t 1 <t 2 ) and contains a leuco compound.

本発明の請求項２に係る発明は、少なくとも可視光不透過性であって赤外線透過性の基材シート１の一面に、温度ｔ２にて１秒間未満の熱エネルギーの付加の後に室温ｔ０（ｔ ０ ＜ｔ２）まで急冷することにより赤外光吸収状態を呈し、温度ｔ１（ｔ１＜ｔ２）にて１秒間以上の熱エネルギーの付加の後に室温ｔ０（ｔ０＜ｔ１＜ｔ２）まで徐冷することにより赤外光透過状態を呈し、ロイコ化合物を含有する赤外光吸収透過性層２と該赤外光吸収透過性層２を保護するオーバーコート層３とを設け、前記基材シート１の他面に貼着層５を設けたことを特徴とする機密情報隠蔽シールである。 In the invention according to claim 2 of the present invention, at least a visible light impermeable and infrared transmissive substrate sheet 1 is heated to room temperature t 0 after applying thermal energy for less than 1 second at a temperature t 2 . By rapidly cooling to (t 0 <t 2 ), an infrared light absorption state is exhibited, and after addition of thermal energy for 1 second or more at temperature t 1 (t 1 <t 2 ), room temperature t 0 (t 0 <t 1 <t 2 ), which exhibits an infrared light transmission state by gradually cooling to 1 <t 2 ), an infrared light absorption / transmission layer 2 containing a leuco compound, and an overcoat layer 3 that protects the infrared light absorption / transmission layer 2 And a sticker layer 5 is provided on the other surface of the base sheet 1.

本発明の請求項３に係る発明は、上記請求項１又は２に係る隠蔽シールにおいて、少なくとも可視光不透過性であって赤外光透過性の前記基材シート１は、紙製シート又はプラスチック製シートであることを特徴とする機密情報隠蔽シールである。   The invention according to claim 3 of the present invention is the concealment seal according to claim 1 or 2, wherein the base sheet 1 that is at least visible light-impermeable and infrared-light transmissive is a paper sheet or plastic It is a confidential information concealment seal characterized by being made of a sheet.

本発明の請求項４に係る発明は、上記請求項１又は２に係る隠蔽シールにおいて、少なくとも可視光不透過性であって赤外光透過性の前記基材シート１は、不透明着色層４にて着色された紙製シート又はプラスチック製シートであることを特徴とする機密情報隠蔽シールである。   The invention according to claim 4 of the present invention is the concealment seal according to claim 1 or 2, wherein the base sheet 1 that is at least visible light-impermeable and infrared-light transmissive is formed on the opaque colored layer 4. A confidential information concealment seal, characterized in that it is a paper sheet or a plastic sheet colored.

本発明の請求項５に係る発明は、上記請求項１又は２に係る隠蔽シールにおいて、少なくとも可視光不透過性であって赤外光透過性の前記基材シート１は、不透明着色剤を混入して着色された紙製シート又はプラスチック製シートであることを特徴とする機密情報隠蔽シールである。   According to a fifth aspect of the present invention, in the concealment seal according to the first or second aspect, the base sheet 1 that is at least visible light-impermeable and infrared-light transmissive is mixed with an opaque colorant. A confidential information concealment seal characterized in that it is a paper sheet or a plastic sheet colored.

本発明の請求項６に係る発明は、上記請求項１乃至５のいずれか１項に係る機密情報隠蔽シールが機密情報記載領域に貼着されて機密情報が隠蔽されていることを特徴とする情報記載書類である。   The invention according to claim 6 of the present invention is characterized in that confidential information is concealed by sticking the confidential information concealment seal according to any one of claims 1 to 5 to the confidential information description area. This is an information document.

本発明の請求項７に係る発明は、請求項６記載の情報記載書類の機密情報記載領域に貼着されて機密情報を隠蔽している機密情報隠蔽シールの表面を温度ｔ１にて１秒間以上加熱した後、室温ｔ０（ｔ０＜ｔ１）まで徐冷して、該隠蔽シール内面の前記赤外光吸収透過性層２を赤外光透過状態にする第１加熱手段と、該隠蔽シールを照明する赤外光域の光源を持つ赤外光照明方式のイメージセンサーと、前記隠蔽シールの表面を温度ｔ２（ｔ２＞ｔ１）にて１秒間未満再加熱した後、室温ｔ０（ｔ０＜ｔ２）まで急冷して、該隠蔽シール内面の前記赤外光吸収透過性層２を赤外光吸収状態にする第２加熱手段とを搭載し、前記赤外光照明方式のイメージセンサーにより隠蔽シールを透して機密情報を読み取るようにしたことを特徴とする機密情報読取装置である。 In the invention according to claim 7 of the present invention, the surface of the confidential information concealment seal which is attached to the confidential information description area of the information description document according to claim 6 and conceals the confidential information is applied for 1 second at a temperature t 1 . After the above heating, the first heating means that gradually cools to room temperature t 0 (t 0 <t 1 ) to bring the infrared light absorbing / transmitting layer 2 on the inner surface of the concealing seal into an infrared light transmitting state, An infrared light illumination type image sensor having an infrared light source that illuminates the concealment seal, and the surface of the concealment seal is reheated at a temperature t 2 (t 2 > t 1 ) for less than 1 second , and then room temperature is reached. a second heating unit that rapidly cools to t 0 (t 0 <t 2 ) to bring the infrared light absorbing / transmitting layer 2 on the inner surface of the concealing seal into an infrared light absorbing state; A special feature is that confidential information is read through a concealment seal using an image sensor. This is a confidential information reader.

本発明の請求項８に係る発明は、請求項６記載の情報記載書類の機密情報記載領域に貼着されて機密情報を隠蔽している機密情報隠蔽シールの表面を温度ｔ１にて１秒間以上加熱した後、室温ｔ０（ｔ０＜ｔ１）まで徐冷して、該隠蔽シール内面の前記赤外光吸収透過性層２を赤外光透過状態にする第１加熱手段と、該隠蔽シールを照明する赤外光域の光源を持つ赤外光照明方式のイメージセンサーと、前記隠蔽シールの表面を温度ｔ２（ｔ２＞ｔ１）にて１秒間未満再加熱した後、室温ｔ０（ｔ０＜ｔ２）まで急冷して、該隠蔽シール内面の前記赤外光吸収透過性層２を赤外光吸収状態にする第２加熱手段と、可視光域の光源を持つ可視光照明方式のイメージセンサーとを搭載し、前記赤外光照明方式のイメージセンサーにより隠蔽シールを透して機密情報を読み取り、前記可視光照明方式のイメージセンサーにより隠蔽シール表面又は／及び情報記載書類表面に記載された機密情報以外の可視情報を読み取るようにしたことを特徴とする機密情報読取装置である。 In the invention according to claim 8 of the present invention, the surface of the confidential information concealment seal which is attached to the confidential information description area of the information description document according to claim 6 and conceals the confidential information is applied for 1 second at the temperature t 1 . After the above heating, the first heating means that gradually cools to room temperature t 0 (t 0 <t 1 ) to bring the infrared light absorbing / transmitting layer 2 on the inner surface of the concealing seal into an infrared light transmitting state, An infrared light illumination type image sensor having an infrared light source that illuminates the concealment seal, and the surface of the concealment seal is reheated at a temperature t 2 (t 2 > t 1 ) for less than 1 second , and then room temperature is reached. A second heating means that rapidly cools to t 0 (t 0 <t 2 ) to bring the infrared light absorbing / transmitting layer 2 on the inner surface of the concealment seal into an infrared light absorbing state, and a visible light source having a light source in the visible light region. It is equipped with a light illumination type image sensor. It is characterized in that confidential information is read through a concealment seal and visible information other than confidential information written on the surface of the concealment seal and / or the information description document is read by the visible light illumination type image sensor. It is a confidential information reader.

本発明の請求項９に係る発明は、請求項７記載の機密情報読取装置を用いて、情報記載書類の機密情報記載領域に貼着された機密情報隠蔽シールの表面を前記第１加熱手段により温度ｔ１にて１秒間以上加熱した後、室温ｔ０（ｔ０＜ｔ１）まで徐冷して、該隠蔽シール内面の赤外光吸収透過性層２を赤外光透過状態にした後、赤外光域の光源を持つ赤外光照明方式の前記イメージセンサーにて隠蔽シールを透して機密情報をイメージ読み込みし、続いて該隠蔽シールの表面を前記第２加熱手段により温度ｔ２（ｔ２＞ｔ１）にて１秒間未満再加熱した後、室温ｔ０（ｔ０＜ｔ２）まで急冷して、該隠蔽シール内面の赤外光吸収透過性層２を赤外光吸収状態にすることを特徴とする機密情報読取方法である。 The invention according to claim 9 of the present invention uses the confidential information reader according to claim 7 to apply the first heating means to the surface of the confidential information concealment sticker adhered to the confidential information description area of the information description document. After heating at temperature t 1 for 1 second or longer, after gradually cooling to room temperature t 0 (t 0 <t 1 ), the infrared light absorbing / transmitting layer 2 on the inner surface of the concealing seal is in an infrared light transmitting state. The confidential information is read through the concealment seal by the image sensor of the infrared illumination system having a light source in the infrared region, and then the surface of the concealment seal is heated to the temperature t 2 by the second heating means. After reheating for less than 1 second at (t 2 > t 1 ), it is rapidly cooled to room temperature t 0 (t 0 <t 2 ) to absorb the infrared light absorbing / transmitting layer 2 on the inner surface of the concealing seal. This is a confidential information reading method characterized in that a state is set.

本発明の請求項１０に係る発明は、請求項８記載の機密情報読取装置を用いて、情報記載書類の機密情報記載領域に貼着された機密情報隠蔽シールの表面を前記第１加熱手段により温度ｔ１にて１秒間以上加熱した後、室温ｔ０（ｔ０＜ｔ１）まで徐冷して、該隠蔽シール内面の赤外光吸収透過性層２を赤外光透過状態にした後、赤外光域の光源を持つ赤外光照明方式の前記イメージセンサーにて隠蔽シールを透して機密情報をイメージ読み込みし、続いて該隠蔽シールの表面を前記第２加熱手段により温度ｔ２（ｔ２＞ｔ１）にて１秒間未満再加熱した後、室温ｔ０（ｔ０＜ｔ２）まで急冷して、該隠蔽シール内面の赤外光吸収透過性層２を赤外光吸収状態にするとともに、前記可視光照明方式のイメージセンサーにより、該隠蔽シール表面又は／及び情報記載書類表面に記載された機密情報以外の可視情報をイメージ読み込みし、それら機密情報と機密情報以外の情報とを一つのイメージデータにデータ論理和（ＯＲ）にて合成して取り扱うことを特徴とする機密情報読取方法である。 The invention according to claim 10 of the present invention uses the confidential information reading device according to claim 8 to cause the surface of the confidential information concealment sticker attached to the confidential information description area of the information description document to be formed by the first heating means. After heating at temperature t 1 for 1 second or longer, after gradually cooling to room temperature t 0 (t 0 <t 1 ), the infrared light absorbing / transmitting layer 2 on the inner surface of the concealing seal is in an infrared light transmitting state. The confidential information is read through the concealment seal by the image sensor of the infrared illumination system having a light source in the infrared region, and then the surface of the concealment seal is heated to the temperature t 2 by the second heating means. After reheating for less than 1 second at (t 2 > t 1 ), it is rapidly cooled to room temperature t 0 (t 0 <t 2 ) to absorb the infrared light absorbing / transmitting layer 2 on the inner surface of the concealing seal. And the visible light illumination type image sensor Visible information other than confidential information written on the surface of the concealment seal and / or information document is read as an image, and the confidential information and information other than confidential information are combined into one image data by data logical sum (OR). This is a confidential information reading method characterized in that it is handled in the same manner.

本発明の機密情報隠蔽シールは、可視光不透過性であって赤外光透過性の基材シート１の一面に、温度ｔ2 にて、１秒間未満（数ｍｍ秒〜数百ｍｍ秒間）の熱エネルギーの付加の後に、室温ｔ0 まで急冷することにより、赤外光吸収状態を呈する。また、温度ｔ1 （ｔ1 ＜ｔ2 ）にて１秒間以上の熱エネルギーの付加の後に、室温ｔ0 まで徐冷することにより、赤外光透過状態を呈し、ロイコ化合物を含有する赤外光吸収透過性層２を設けたものである。 The confidential information concealment seal of the present invention is visible light-impermeable and infrared-light-transmissive substrate sheet 1 on one surface at a temperature t 2 of less than 1 second (several milliseconds to several hundreds of millimeter seconds). After the thermal energy is added, it is rapidly cooled to room temperature t 0 to exhibit an infrared light absorption state. Further, after adding thermal energy for 1 second or more at a temperature t 1 (t 1 <t 2 ), by gradually cooling to room temperature t 0 , an infrared light transmission state is exhibited and an infrared containing a leuco compound is contained. The light absorbing / transmitting layer 2 is provided.

このような本発明の機密情報隠蔽シールは、機密を必要とする書類（情報記載書類）に赤外線吸収性記録材料によって機密情報が記載されている機密情報記載欄に被覆貼着することにより、可視光不透過性であって赤外光透過性の基材シート１によって、その機密情報は、肉眼や可視光照明方式の読取装置では読み取り不可能とすることができる。   Such a confidential information concealment seal of the present invention can be made visible by applying a cover to a confidential information description column in which confidential information is described with an infrared absorbing recording material on a document requiring confidentiality (information describing document). With the base sheet 1 that is light-impermeable and infrared-light transmissive, the confidential information can be made unreadable by the naked eye or a visible light illumination type reader.

また、本発明の機密情報隠蔽シールを、加熱手段により特定温度ｔ1 にて１秒間以上の熱エネルギーの付加の後に、室温ｔ0 （ｔ0 ＜ｔ1 ）まで徐冷して、該隠蔽シール内面の赤外光吸収透過性層２を赤外光透過状態にしない限りは、該赤外光吸収透過性層２は、赤外光吸収状態を呈している。そのために、該赤外光吸収透過性層２は、赤外光不透過性の状態にあり、本発明の上記隠蔽シールの貼着された機密情報は、赤外線カメラや赤外光照
明方式の自動読取装置でも、簡単には読み取ることを不可能とすることができ、書類に記載された機密情報を確実に隠蔽することができる。 Further, the confidential information concealment seal of the present invention is gradually cooled to room temperature t 0 (t 0 <t 1 ) after applying heat energy for 1 second or more at a specific temperature t 1 by a heating means, and the concealment seal Unless the infrared light absorbing / transmitting layer 2 on the inner surface is in an infrared light transmitting state, the infrared light absorbing / transmitting layer 2 is in an infrared light absorbing state. Therefore, the infrared light absorbing / transmitting layer 2 is in an infrared light impervious state, and the confidential information to which the concealment sticker of the present invention is attached is automatically detected by an infrared camera or an infrared light illumination system. Even the reading device can make reading impossible easily, and the confidential information described in the document can be surely concealed.

本発明の機密情報読取装置及び機密情報読取方法によれば、書類（情報記載書類）の機密情報記載領域に貼着して機密情報を隠蔽した機密情報隠蔽シールの表面を、第１加熱手段により、温度ｔ1 にて１秒間以上加熱して、該隠蔽シール内面の前記赤外光吸収透過性層２を赤外光透過状態にすることができる。そのために、該隠蔽シールを照明する赤外光域の光源を持つ赤外光照明方式のイメージセンサーによって、該隠蔽シールを貼着した状態にて、その隠蔽シール内面に赤外線吸収性記録材料によって記載されている機密情報を読み取ることが可能となる。 According to the confidential information reading apparatus and the confidential information reading method of the present invention, the surface of the confidential information concealment seal that is attached to the confidential information description area of the document (information description document) and conceals the confidential information is applied by the first heating means. The infrared light absorbing / transmitting layer 2 on the inner surface of the concealing seal can be brought into an infrared light transmitting state by heating at a temperature t 1 for 1 second or longer. For this purpose, an infrared light recording type image sensor having an infrared light source that illuminates the concealment seal is used to describe the inner surface of the concealment seal with an infrared-absorbing recording material. It is possible to read confidential information.

また、本発明の機密情報読取装置及び機密情報読取方法によれば、前記赤外光照明方式のイメージセンサーによって書類に記載された機密情報を読み取った後は、前記隠蔽シールの表面を、第２加熱手段により、温度ｔ2 （ｔ2 ＞ｔ1 ）にて１秒間未満（数ｍｍ秒〜数百ｍｍ秒間）再加熱して、該隠蔽シール内面の前記赤外光吸収透過性層２を赤外光吸収状態にすることができる。このように、可逆的に、前記赤外光吸収透過性層２を赤外光不透過状態にすることができるため、赤外線カメラや赤外光照明方式の自動読取装置でも、隠蔽シールの貼着された機密情報を簡単には読み取ることが不可能な状態に戻すことができ、書類に記載された機密情報を確実に隠蔽することができる。 Further, according to the confidential information reading apparatus and the confidential information reading method of the present invention, after the confidential information described in the document is read by the infrared light illumination type image sensor, the surface of the concealment seal is moved to the second surface. Reheating the infrared light absorbing / transmitting layer 2 on the inner surface of the concealing seal by reheating the heating means at a temperature t 2 (t 2 > t 1 ) for less than 1 second (several mm seconds to several hundred mm seconds). It can be in an external light absorption state. In this manner, the infrared light absorbing / transmitting layer 2 can be reversibly brought into an infrared light non-transparent state, and therefore, even with an infrared camera or an infrared light automatic reading device, the concealment sticker is attached. It is possible to return the confidential information thus made to a state where it cannot be easily read, and it is possible to reliably conceal the confidential information described in the document.

本発明の機密情報隠蔽シールの実施の形態を以下に詳細に説明すれば、図１（ａ）は、本発明の隠蔽シールＡの側面図、図１（ｂ）は、その隠蔽シールＡを書類（情報記載書類）の機密情報記載領域に貼着して機密情報を隠蔽した状態を説明する部分拡大側面図である。   An embodiment of the confidential information concealment seal of the present invention will be described in detail below. FIG. 1 (a) is a side view of the concealment seal A of the present invention, and FIG. It is a partial expanded side view explaining the state which adhered to the confidential information description area | region of (information description document) and concealed confidential information.

図１（ａ）に示すように、本発明の隠蔽シールＡは、少なくとも可視光不透過性であって赤外光透過性の基材シート１の一面に、赤外光吸収透過性層２を設け、該赤外光吸収透過性層２を保護するために保護層としてオーバーコート層３を設けている。   As shown in FIG. 1 (a), the concealment seal A of the present invention has an infrared light absorbing / transmitting layer 2 on at least one surface of a base material sheet 1 that is opaque to visible light and transparent to infrared light. An overcoat layer 3 is provided as a protective layer for protecting the infrared light absorbing / transmitting layer 2.

基材シート１は、例えば、紙製シート又はプラスチック製シートであって、該基材シート１を可視光不透過性とするために、該基材シート１の他面に、可視光不透過性層４（隠蔽層）を設けて、該基材シート１本体を着色してもよい。また、該基材シート１本体に不透明着色剤を混入して着色してもよい。   The base material sheet 1 is, for example, a paper sheet or a plastic sheet, and in order to make the base material sheet 1 opaque to visible light, the other surface of the base material sheet 1 has a visible light impermeability. A layer 4 (hiding layer) may be provided to color the base sheet 1 body. Moreover, you may color by mixing an opaque coloring agent in this base material sheet 1 main body.

図１（ａ）に示すように、本発明の隠蔽シールＡは、書類（情報記載書類）の機密情報記載領域に貼着するために、基材シート１の他面に、該隠蔽シールＡを貼着するための貼着層５（粘着剤層、接着剤層であって、剥離可及び再接着不可、又は剥離不可及び再接着不可）を設けている。   As shown in FIG. 1 (a), the concealment seal A of the present invention is attached to the other surface of the base sheet 1 in order to adhere to the confidential information description area of the document (information description document). An adhesive layer 5 (adhesive layer, adhesive layer, which can be peeled off and cannot be re-adhered, or cannot be peeled off and cannot be re-adhered) is provided for sticking.

なお、本発明の隠蔽シールＡの赤外光吸収透過性層２、可視光不透過性層４のそれぞれ積層位置は、図１（ａ）、（ｂ）においては、基材シート１に対して互いに相対面側に設けられ、赤外光吸収透過性層２は、隠蔽シールＡの貼着層５と反対側である表面側に、可視光不透過性層４は、隠蔽シールＡの貼着層５側である裏面側に設けられている。   In addition, the laminated positions of the infrared light absorbing / transmitting layer 2 and the visible light impermeable layer 4 of the concealment seal A of the present invention are respectively relative to the base sheet 1 in FIGS. The infrared light absorbing / transmitting layer 2 is provided on the opposite surface side, and the visible light impermeable layer 4 is attached to the concealing seal A on the surface side opposite to the attaching layer 5 of the concealing seal A. It is provided on the back side that is the layer 5 side.

しかしながら、本発明においては、特にこれに限定されるものではなく、それぞれ赤外光吸収透過性層２、可視光不透過性層４は、例えば、基材シート１に対して互いに同じ面に設けられていてもよい。また、隠蔽シールＡの貼着層５側である裏面側に赤外光吸収透過性層２を設け、隠蔽シールＡの貼着層５と反対側である表面側に可視光不透過性層４を設けるようにしてもよい。   However, the present invention is not particularly limited thereto, and the infrared light absorbing / transmitting layer 2 and the visible light impermeable layer 4 are provided on the same surface with respect to the base sheet 1, for example. It may be done. Further, the infrared light absorbing / transmitting layer 2 is provided on the back surface side which is the adhesive layer 5 side of the concealment seal A, and the visible light impermeable layer 4 is provided on the surface side opposite to the adhesive layer 5 of the concealment seal A. May be provided.

前記赤外光吸収透過性層２は、熱エネルギーの付加過程の相違によって、赤外光に対して吸収性を呈したり透過性を呈したりしてリライト性能を持つ。   The infrared light absorbing / transmitting layer 2 has rewrite performance by exhibiting absorbability or transmittance with respect to infrared light depending on the difference in the addition process of thermal energy.

該赤外光吸収透過性層２は、ロイコ化合物（必要に応じて顕減色剤を添加）を含有する層であり、特定温度ｔ2 にて、１秒間未満（数ｍｍ秒〜数百ｍｍ秒間）の熱エネルギーの付加の後に、室温ｔ0 （ｔ0 ＜ｔ2 ）まで急冷することにより、赤外光吸収状態を呈するものである。また、特定温度ｔ1 （ｔ1 ＜ｔ2 ）にて、１秒間以上の熱エネルギーの付加の後に、室温ｔ0 （ｔ0 ＜ｔｔ1 ＜2 ）まで徐冷することにより、赤外光透過状態を呈するものである。なお赤外光吸収透過性層２を赤外光透過状態にするための加熱と徐冷は、後述する第１加熱手段（例えばセラミック板ヒーター）により行い、赤外光吸収状態にするための加熱と急冷は、後述する第２加熱手段（例えばサーマルヘッド）により行う。 The infrared light absorbing / transmitting layer 2 is a layer containing a leuco compound (adding a subtractive color reducing agent as necessary), and is less than 1 second (several milliseconds to several hundreds of millimeter seconds at a specific temperature t 2 . ) Is added to the room temperature t 0 (t 0 <t 2 ), and then exhibits an infrared light absorption state. In addition, after adding thermal energy for 1 second or more at a specific temperature t 1 (t 1 <t 2 ), it is gradually cooled to room temperature t 0 (t 0 <tt 1 < 2 ), thereby transmitting infrared light. It presents a state. The heating and slow cooling for setting the infrared light absorbing / transmitting layer 2 to the infrared light transmitting state are performed by a first heating means (for example, a ceramic plate heater) described later, and heating for setting the infrared light absorbing state to the infrared light absorbing state. The rapid cooling is performed by a second heating means (for example, a thermal head) described later.

また、前記赤外光吸収透過性層２としては、熱エネルギーの付加過程の相違によって光拡散性を有する白濁状態になって可視光及び赤外光に対して吸収状態（不透過性）を呈したり、透明状態になって可視光及び赤外光に対して透過状態を呈したりするリライト性能を持つものでもよい。なお、赤外光吸収透過性層２を赤外光透過状態にするための加熱と徐冷は、後述する第１加熱手段（例えば熱レーザー光）により行い、赤外光吸収状態にするための加熱と急冷は、後述する第２加熱手段（例えばサーマルヘッド）により行うものである。   In addition, the infrared light absorbing / transmitting layer 2 becomes a white turbid state having light diffusibility due to a difference in the addition process of thermal energy and exhibits an absorbing state (impermeable) to visible light and infrared light. Alternatively, it may have a rewrite performance that becomes transparent and exhibits a transmission state with respect to visible light and infrared light. The heating and slow cooling for making the infrared light absorbing / transmitting layer 2 in the infrared light transmitting state are performed by a first heating means (for example, thermal laser light) to be described later to make the infrared light absorbing state. Heating and rapid cooling are performed by a second heating means (for example, a thermal head) described later.

このように赤外光吸収透過性層２は、特定温度による熱エネルギーの付加によって、赤外光吸収性の状態と赤外光透過性の状態とに可逆的に変態する。なお、ロイコ化合物及び必要に応じて顕減色剤を添加した赤外光吸収性と赤外光透過性とに可逆的に変態する材料については特開平８−２１６５１８号公報に記載された材料を使用することができる。   As described above, the infrared light absorbing / transmitting layer 2 is reversibly transformed into an infrared light absorbing state and an infrared light transmitting state by the addition of thermal energy at a specific temperature. For materials that reversibly transform into infrared light absorbability and infrared light transmittance with the addition of a leuco compound and, if necessary, a color reducing agent, use the materials described in JP-A-8-216518. can do.

本発明の上記隠蔽シールＡは、図１（ｂ）に示すように、書類Ｂ（情報記載書類）の機密情報記載領域Ｓ（機密情報記載欄）に赤外光吸収性記録材料を用いて印字、記載された機密を要する可視性の機密情報ａを被覆隠蔽するように貼着層５にて貼着される。なお、書類Ｂの機密情報記載領域Ｓ以外の領域には、機密を要しない可視情報ｂ（通常情報）が印字、記載されている。なお、前記隠蔽シールＡは、必要に応じて、その外面に、赤外光透過性記録材料（通常印刷用インキ、通常筆記用インキ、通常筆記用具等）によって、文字、記号、絵柄などの可視情報ｂ（通常情報）が設けられていてもよい。   As shown in FIG. 1B, the concealment seal A of the present invention is printed using an infrared light absorbing recording material in a confidential information description area S (confidential information description column) of a document B (information description document). The visible confidential information a that requires confidentiality is affixed by the adhesive layer 5 so as to cover and conceal it. It should be noted that visible information b (normal information) that does not require confidentiality is printed and described in an area other than the confidential information description area S of the document B. The concealment seal A is visible on the outer surface of characters, symbols, patterns, etc., if necessary, by using an infrared light transmissive recording material (normal printing ink, normal writing ink, normal writing instrument, etc.). Information b (normal information) may be provided.

隠蔽シールＡを機密情報記載領域Ｓに貼着した書類Ｂは、隠蔽シールＡ面を照明する赤外光域の光源（ＩＲ照明光源）によって、その隠蔽シールＡ面が照明される。   The document B in which the concealment seal A is attached to the confidential information description area S is illuminated on the concealment seal A surface by an infrared light source (IR illumination light source) that illuminates the concealment seal A surface.

書類Ｂの機密情報記載領域Ｓに貼着した隠蔽シールＡの赤外光吸収透過性層２が、赤外光吸収性の状態においては、図１（ｂ）に示す赤外光ＩＲが隠蔽シールＡの表面に照明されても、その赤外光ＩＲは赤外光吸収透過性層２によって吸収されて、隠蔽シールＡ及び書類Ｂを透過しない。   When the infrared light absorbing / transmitting layer 2 of the concealment seal A attached to the confidential information description area S of the document B is in an infrared light absorptive state, the infrared light IR shown in FIG. Even if the surface of A is illuminated, the infrared light IR is absorbed by the infrared light absorbing / transmitting layer 2 and does not pass through the concealment seal A and the document B.

ところが、隠蔽シールＡの赤外光吸収透過性層２が、赤外光透過性の状態においては、図１（ｂ）に示す隠蔽シールＡの表面に照明された赤外光ＩＲは、赤外光吸収透過性層２を透過して隠蔽シールＡ及び書類Ｂを透過する。   However, when the infrared light absorbing / transmitting layer 2 of the concealing seal A is in an infrared light transmitting state, the infrared light IR illuminated on the surface of the concealing seal A shown in FIG. The light-absorbing and permeable layer 2 is transmitted and the concealment seal A and the document B are transmitted.

隠蔽シールＡの表面に照明された赤外光ＩＲのうち、隠蔽シールＡを透過して、書類Ｂの機密情報記載領域Ｓ（機密情報記載欄）に赤外光吸収性記録材料を用いて印字、記載された機密を要する可視性の機密情報ａに到達した赤外光ＩＲは、この赤外光吸収性の機密情報ａによって吸収される。   Of the infrared light IR illuminated on the surface of the concealment seal A, it passes through the concealment seal A and is printed on the confidential information description area S (confidential information description column) of the document B using an infrared light absorbing recording material. Infrared light IR that has reached the classified confidential information a requiring confidentiality is absorbed by the infrared light absorbing confidential information a.

そのために、隠蔽シールＡの表面に照明された赤外光ＩＲのうち、隠蔽シールＡと書類Ｂとを透過した赤外光ＩＲと、機密情報ａによって吸収された赤外光ＩＲとの光量差が発生する。そのため、隠蔽シールＡに対して反対側の書類Ｂ裏面側に配置した赤外光照明方式のイメージセンサーによって、該隠蔽シールＡを貼着した状態にて、その隠蔽シールＡにて隠蔽されている赤外光吸収性記録材料によって記載されている不可視状態の機密情報ａを読み取ることができる。   Therefore, among the infrared light IR illuminated on the surface of the concealment seal A, the light amount difference between the infrared light IR transmitted through the concealment seal A and the document B and the infrared light IR absorbed by the confidential information a. Will occur. Therefore, it is concealed by the concealment seal A in a state in which the concealment seal A is adhered by the image sensor of the infrared light illumination system arranged on the back side of the document B opposite to the concealment seal A. The invisible confidential information a described by the infrared light-absorbing recording material can be read.

本発明の機密情報読取装置は、図２の概要側面図に示すように、情報を読み取る対象のシートＢ（情報記載書類）を搬送するシート搬送手段１０を備え、該シート搬送手段１０の搬送路に沿って、シート通過検出用フォトセンサー１２ａ付きの管理番号印字手段１２と、第１加熱手段１３（加熱押圧板１３ａ（例えばセラミック板ヒーター）、シート受盤１３ｂ）と、赤外光域照明光源により読み取り可能な赤外光読取方式イメージセンサー１４（赤外光投光部１４ａ、赤外光受光部１４ｂ）と、第２加熱手段１５（加熱押圧板１５ａ（例えばサーマルヘッド）、シート受盤１５ｂ）とを搭載している。   As shown in the schematic side view of FIG. 2, the confidential information reading apparatus of the present invention includes a sheet conveying unit 10 that conveys a sheet B (information description document) to be read, and a conveyance path of the sheet conveying unit 10. A control number printing unit 12 with a sheet passing detection photosensor 12a, a first heating unit 13 (a heating pressing plate 13a (for example, a ceramic plate heater), a sheet receiving plate 13b), and an infrared light source. Infrared light reading type image sensor 14 (infrared light projecting portion 14a, infrared light receiving portion 14b), second heating means 15 (heating pressure plate 15a (for example, thermal head), sheet receiving plate 15b) ) And.

前記第１加熱手段１３、第２加熱手段１５のそれぞれ加熱押圧板１３ａ、１５ａは、それぞれシート受盤１３ｂ、１５ｂに対して押圧、離反動作を行うものである。   The heating pressing plates 13a and 15a of the first heating means 13 and the second heating means 15 respectively perform pressing and separating operations against the sheet receiving plates 13b and 15b, respectively.

また、必要に応じて、該シート搬送手段１０の搬送路に沿った管理番号印字手段１２の後段におけるいずれかの位置には、可視光域照明光源により読み取り可能な可視光読取方式イメージセンサー１６を搭載することができる。   Further, if necessary, a visible light reading type image sensor 16 that can be read by a visible light range illumination light source is provided at any position in the subsequent stage of the management number printing means 12 along the conveyance path of the sheet conveying means 10. Can be installed.

シート搬送手段１０の搬送方式については、前記シートＢを、図面右側のシート導入部の方向から図面左側のシート搬出部の方向に、図示するように水平直線状又は垂直直線状に、あるいは円形状乃至曲線状に搬送する方式であれば、本発明においては特に限定されるものではない。   As for the conveying method of the sheet conveying means 10, the sheet B is moved from the direction of the sheet introducing portion on the right side of the drawing to the direction of the sheet unloading portion on the left side of the drawing, as shown in the horizontal linear shape or vertical linear shape, or circular shape. The present invention is not particularly limited as long as it is a method of conveying in a curved shape.

例えば、図示するように、シート搬送手段１０は、上下に対向してシートＢを挟み付けて駆動回転する対向搬送ローラ１１、１１を、２対〜複数対にて設置したものである。   For example, as shown in the figure, the sheet conveying means 10 is provided with two to plural pairs of opposed conveying rollers 11 and 11 that are opposed to each other in the vertical direction and sandwich and drive the sheet B.

本発明装置にて情報を読み取る対象のシートＢ（書類）は、図１（ｂ）の部分側断面図に示すように、該シートＢの表面の所定の領域には、機密を要する情報（機密情報）を記載するための記入欄など機密情報記載領域Ｓが設けられていて、その領域Ｓ内には、可視光吸収・反射性着色剤（顔料、染料等）を混入した赤外光吸収性材料である赤外光吸収性着色インキ等の記録材料を用いて、住所、氏名、年齢、職業、性別、電話番号等の所定の機密情報ａ（赤外光吸収性及び可視光吸収・反射性の可視情報）が記載されている。   As shown in the partial side sectional view of FIG. 1B, the sheet B (document) from which information is read by the apparatus of the present invention has confidential information (confidential information) in a predetermined area on the surface of the sheet B. A confidential information description area S such as an entry field for describing (information) is provided. In the area S, a visible light absorption / reflection colorant (pigment, dye, etc.) is mixed. Using a recording material such as infrared light-absorbing colored ink as the material, predetermined confidential information such as address, name, age, occupation, gender, telephone number, etc. (infrared light absorption and visible light absorption / reflection properties) Visible information).

また、図１（ｂ）に示すように、そのシートＢの表面乃至裏面には、可視光吸収・反射性着色剤（顔料、染料等）を混入した赤外光透過性材料である通常着色インキ等の記録材料を用いて、機密を要しない通常情報ｂ（可視光透過性及び可視光吸収・反射性の可視情報）が、印刷、印字され、又は手書き等にて記載されている。   Further, as shown in FIG. 1B, a normal colored ink which is an infrared light transmitting material in which a visible light absorbing / reflecting colorant (pigment, dye, etc.) is mixed on the front surface or the back surface of the sheet B. The normal information b (visible light transmitting property and visible light absorbing / reflecting visible information) that does not require confidential information is printed, printed, or written by handwriting.

そして、図１（ｂ）に示すように、赤外光吸収性及び可視光吸収・反射性の可視情報である機密情報ａが記載された機密情報記載領域Ｓ面には、可視光による目視を不可視とする可視光不透過性の隠蔽シールＡが貼着されて機密情報ａが隠蔽されている。   Then, as shown in FIG. 1 (b), the confidential information description area S where the confidential information a which is visible information of infrared light absorption and visible light absorption / reflection is described is visually observed with visible light. A visible light impervious concealment seal A that is invisible is attached to conceal confidential information a.

上記隠蔽シールＡは、少なくとも可視光不透過性であって赤外光透過性の基材シート１の一面に、温度ｔ2 にて１秒間未満（数ｍｍ秒〜数百ｍｍ秒間）の熱エネルギーの付加の後に室温ｔ0 （ｔ0 ＜ｔ2 ）まで急冷することにより赤外光吸収状態を呈し、温度ｔ1 （
ｔ1 ＜ｔ2 ）にて１秒間以上の熱エネルギーの付加の後に室温ｔ0 （ｔ0 ＜ｔｔ1 ＜2 ）まで徐冷することにより赤外光透過状態を呈し、ロイコ化合物を含有する赤外光吸収透過性層２を設けたものである。 The concealment seal A is on one side of the IR transmission of the substrate sheet 1 and at least visible light impermeable, heat energy of less than one second at a temperature t 2 (several mm seconds to several hundreds mm seconds) Is added to the room temperature t 0 (t 0 <t 2 ) to exhibit an infrared light absorption state, and the temperature t 1 (
After adding heat energy for 1 second or longer at t 1 <t 2 ), the mixture is gradually cooled to room temperature t 0 (t 0 <tt 1 < 2 ), thereby exhibiting an infrared light transmission state and red containing a leuco compound An external light absorbing / transmitting layer 2 is provided.

まず、本発明の機密情報読取装置及び機密情報読取方法について説明すれば、図２に示すように、隠蔽シールＡを機密情報記載領域Ｓ面に貼着したシートＢが、シート搬送手段１０にて矢印方向に搬送される。   First, the confidential information reading apparatus and the confidential information reading method of the present invention will be described. As shown in FIG. 2, the sheet B with the concealment seal A adhered to the confidential information description area S is transferred by the sheet conveying means 10. It is conveyed in the direction of the arrow.

シートＢが管理番号印字手段１２を通過すると、そのシートＢの通過をフォトセンサー１２ａが検出して、その検出信号に基づいてシリアルナンバーとしての通常情報ｂである固有の管理番号が、図１（ｂ）に示すように、そのシートＢ面（隠蔽シールＡ以外の面、又は隠蔽シールＡの表面を含む面）に印字される。   When the sheet B passes the management number printing means 12, the photo sensor 12a detects the passage of the sheet B, and the unique management number, which is the normal information b as the serial number, is shown in FIG. As shown in b), printing is performed on the sheet B surface (a surface other than the concealment seal A or a surface including the surface of the concealment seal A).

続いて、シート搬送手段１０にて矢印方向に搬送される前記シートＢの隠蔽シールＡの通過が第１加熱操作タイミング検知用のフォトセンサー１３ｃにより検知され、その検知信号の発信とタイマー（又はシート搬送手段１０の駆動系に設置されたロータリーエンコーダ）に基づいて、この隠蔽シールＡが第１加熱手段１３の加熱押圧板１３ａの真下に到達するタイミングを検知して、その到達タイミング検知信号の発信により、シート搬送手段１０が一旦停止して前記シートＢを停止させる。   Subsequently, the passage of the concealment seal A of the sheet B conveyed in the direction of the arrow by the sheet conveying means 10 is detected by the photosensor 13c for detecting the first heating operation timing, and transmission of the detection signal and a timer (or sheet) Based on a rotary encoder installed in the drive system of the conveying means 10, the timing at which the concealment seal A reaches just below the heating pressing plate 13a of the first heating means 13 is detected, and the arrival timing detection signal is transmitted. As a result, the sheet conveying means 10 temporarily stops and the sheet B is stopped.

シートＢの隠蔽シールＡが第１加熱手段１３の加熱押圧板１３ａの真下にて停止した時点で、加熱押圧板１３ａは下降動作して、隠蔽シールＡを押圧するとともに加熱し、該隠蔽シールＡの赤外光吸収透過性層２に対して、温度ｔ1 （ｔ1 ＜ｔ2 ）にて１秒間以上の熱エネルギーの付加を行い、直ちに上昇動作する。そして、その後直ちに、室温ｔ0 （ｔ0 ＜ｔｔ1 ＜2 ）まで徐冷することにより、隠蔽シールＡの赤外光吸収透過性層２は赤外光透過状態を呈する。 When the concealment seal A of the sheet B stops just below the heating pressing plate 13a of the first heating means 13, the heating pressing plate 13a moves down to press and heat the concealing seal A, and the concealing seal A Thermal energy is applied to the infrared light absorbing / transmitting layer 2 at a temperature of t 1 (t 1 <t 2 ) for 1 second or more, and immediately rises. And immediately after that, by gradually cooling to room temperature t 0 (t 0 <tt 1 < 2 ), the infrared light absorbing / transmitting layer 2 of the concealment seal A exhibits an infrared light transmitting state.

続いて、シート搬送手段１０は搬送動作を再開して、前記シートＢは矢印方向に搬送され、赤外光域の照明光源による赤外光読取方式のイメージセンサー１４を通過する。その際に、シートＢの機密情報記載領域Ｓ面に貼着された隠蔽シールＡの表面が、赤外光読取方式のイメージセンサー１４の赤外光域照明光源である赤外投光部１４ａにて照明され、該隠蔽シールＡの内面側の赤外光吸収性インキにより記載した機密情報ａにて吸収された赤外光以外の該隠蔽シールＡ及びシートＢを透過した赤外光が、赤外光受光部１４ｂにて赤外光読み取り電子データとして読み取られる。   Subsequently, the sheet conveying means 10 resumes the conveying operation, the sheet B is conveyed in the direction of the arrow, and passes through the infrared light reading type image sensor 14 by the illumination light source in the infrared light region. At that time, the surface of the concealment seal A attached to the confidential information description area S surface of the sheet B is applied to the infrared light projecting unit 14a which is an infrared light area illumination light source of the image sensor 14 of the infrared light reading method. The infrared light transmitted through the concealment seal A and the sheet B other than the infrared light absorbed by the confidential information a described by the infrared light absorbing ink on the inner surface side of the concealment seal A is red. The infrared light reading unit 14b reads the infrared light as electronic data.

続いて、前記シートＢはシート搬送手段１０により矢印方向に搬送され、該シートＢの隠蔽シールＡの通過が第２加熱操作タイミング検知用のフォトセンサー１５ｃにより検知され、その検知信号の発信とタイマー（又はシート搬送手段１０の駆動系に設置されたロータリーエンコーダ）に基づいて、この隠蔽シールＡが第２加熱手段１５の加熱押圧板１５ａの真下に到達するタイミングを検知して、その到達タイミング検知信号の発信によりシート搬送手段１０が一旦停止して前記シートＢを停止させる。   Subsequently, the sheet B is conveyed in the direction of the arrow by the sheet conveying means 10, and the passage of the concealment seal A of the sheet B is detected by the photosensor 15c for detecting the second heating operation timing. Based on (or a rotary encoder installed in the drive system of the sheet conveying unit 10), the timing at which the concealment seal A reaches just below the heating pressing plate 15a of the second heating unit 15 is detected, and the arrival timing is detected. When the signal is transmitted, the sheet conveying means 10 temporarily stops and the sheet B is stopped.

シートＢの隠蔽シールＡが第２加熱手段１５の加熱押圧板１５ａの真下にて停止した時点で、加熱押圧板１５ａは下降動作して、隠蔽シールＡを押圧するとともに加熱し、該隠蔽シールＡの赤外光吸収透過性層２に対して、温度ｔ2 にて１秒間未満（数ｍｍ秒〜数百ｍｍ秒間）の熱エネルギーの付加を行い、直ちに上昇動作する。そして、その後直ちに、室温ｔ0 （ｔ0 ＜ｔ2 ）まで急冷することにより、隠蔽シールＡの赤外光吸収透過性層２は赤外光吸収状態を呈する。 When the concealment seal A of the sheet B stops just below the heating pressing plate 15a of the second heating means 15, the heating pressing plate 15a moves down to press and heat the concealing seal A, and the concealing seal A The thermal energy of less than 1 second (several mm seconds to several hundred mm seconds) is applied to the infrared light absorbing / transmitting layer 2 at a temperature t 2 and immediately rises. Then, immediately after that, the infrared light absorbing / transmitting layer 2 of the concealment seal A exhibits an infrared light absorbing state by rapidly cooling to room temperature t 0 (t 0 <t 2 ).

また、シートＢが、必要に応じて設けた可視光域の照明光源による可視光読取方式のイ
メージセンサー１６を通過すると、該シートＢの外面（表面）に管理番号印字手段１２により印字された管理番号、あるいは、予め印刷、あるいは手書きにて記載された文字、記号、絵柄等の通常情報ｂが、該センサー１６により可視光域の照明光源にて照明されて、可視光読み取り電子データとして読み取られる。 In addition, when the sheet B passes through the visible light reading type image sensor 16 with an illumination light source provided in the visible light range as necessary, the management number printed on the outer surface (front surface) of the sheet B by the management number printing unit 12 The normal information b such as numbers, characters, symbols, or patterns previously printed or handwritten is illuminated by an illumination light source in the visible light range and read as visible light reading electronic data. .

また、該シートＢの機密情報記載領域Ｓ面に貼着された隠蔽シールＡの外面に、予め印刷、あるいは手書きにて記載された文字、記号、絵柄等の通常情報ｂも、可視光読取方式のイメージセンサー１６により、可視光域の照明光源にて照明されて、可視光読み取り電子データとして読み取られる。   In addition, the normal information b such as characters, symbols, patterns, etc. printed or handwritten in advance on the outer surface of the concealment seal A attached to the confidential information description area S surface of the sheet B is also visible light reading method. The image sensor 16 is illuminated with an illumination light source in the visible light range and is read as visible light reading electronic data.

このようにして本発明装置により機密情報ａが読み取られ、又は機密情報ａと通常情報ｂが読み取られ、シート搬送手段１０にて搬送された前記シートＢは矢印方向に搬出されて、読み取りが終了する。   In this way, the confidential information a is read by the apparatus of the present invention, or the confidential information a and the normal information b are read, and the sheet B conveyed by the sheet conveying means 10 is unloaded in the direction of the arrow, and the reading is completed. To do.

図３は、赤外光読取方式のイメージセンサー１４と可視光読取方式のイメージセンサー１６とを備えた場合における本発明の機密情報読取装置のブロック図であり、イメージセンサー１４にて読み取られた赤外光読み取り電子データと、イメージセンサー１３により読み取られた可視光読み取り電子データとを論理和してデータ合成するＯＲ回路からなるデータ合成手段２１と、該データ合成手段２１にてデータ合成された合成データを記憶するデータメモリ部２２とを備える。   FIG. 3 is a block diagram of the confidential information reading apparatus of the present invention in the case where the infrared light reading type image sensor 14 and the visible light reading type image sensor 16 are provided, and red read by the image sensor 14. Data synthesizing means 21 comprising an OR circuit for synthesizing data by ORing external light reading electronic data and visible light reading electronic data read by the image sensor 13, and composition synthesized by the data synthesizing means 21 And a data memory unit 22 for storing data.

また、パソコン、データサーバ等のデータ演算制御部２３（ＣＰＵ）を備え、前記データメモリ部２２に接続されていて、該メモリ部２２に記憶された合成データを読み出して機密情報ａ、通常情報ｂが読み取られたシートＢのシート管理データ処理、集計用として使用され、また、データ演算制御部２３に接続したデバイス制御部２４を備え、データ演算制御部２３にてデータ処理、集計されたシートＢによる商品の調達、箱詰め、積込み、移送、保管等の作業の指示用データ、管理用データ作成のためのシート読み取り用ラインセンサー等のデバイス制御を行う。   In addition, a data calculation control unit 23 (CPU) such as a personal computer or a data server is provided, connected to the data memory unit 22, reads out the synthesized data stored in the memory unit 22, reads confidential information a, and normal information b Is used for the sheet management data processing and tabulation of the sheet B from which the sheet B is read, and also includes a device control unit 24 connected to the data calculation control unit 23, and the data calculation control unit 23 performs data processing and tabulation of the sheet B Controls devices such as product line procurement, boxing, loading, transfer, storage, etc., instruction data, and sheet reading line sensors for creating management data.

本発明の機密情報読取装置を用いた機密情報読取方法について、上記のシートＢを案内書の申込み用葉書として利用する場合について、その一実施の形態を、図４に基づいて以下に説明すれば、まず、（ａ）申込み受付者が発送した案内書（未貼着の隠蔽シートＡ付き申込み用葉書Ｂを同封）が申込み者に配達されて、（ｂ）申込み者は、その案内書を開封して、（ｃ）同封されている申込み用葉書Ｂの機密事項記載領域Ｓ（記載欄）に、着色した赤外線吸収性材料（ボールペン等）を用いて、住所、氏名、生年月日、職業、電話番号や、捺印の他に、申込み事項（希望事項、選択事項）等の情報（機密情報ａ）を記載する。   An embodiment of the confidential information reading method using the confidential information reading apparatus according to the present invention, in the case where the sheet B is used as a postcard for applying for a guide, will be described below with reference to FIG. First, (a) the guide sent by the application recipient (enclosed with the application postcard B with the non-sticking concealment sheet A) is delivered to the applicant, and (b) the applicant opens the guide. (C) Using a colored infrared-absorbing material (such as a ballpoint pen) in the confidential information description area S (description column) of the enclosed application postcard B, the address, name, date of birth, occupation, In addition to the telephone number and the seal, information (confidential information a) such as application items (desired items, selection items) is described.

そして、申込み用葉書Ｂの機密事項記載領域Ｓに、（ｄ）可視光不透過性の本発明の隠蔽シールＡ（図１（ａ）参照）を貼着して、（ｅ）記載された情報（機密情報ａ）を肉眼にて見ることができないように隠蔽した後、（ｆ）その隠蔽シールＡを貼着した葉書Ｂ（図１（ｂ）参照）を郵便物として投函して申込み受付者に送付する。   Then, (d) the hidden seal A (see FIG. 1 (a)) of the present invention that is impermeable to visible light is pasted on the confidential matter description area S of the application postcard B, and (e) the information described (Confidential information a) is concealed so that it cannot be seen with the naked eye, and (f) Postcard B with the concealment seal A attached (see FIG. 1 (b)) is posted as a postal mail, and the application receptionist Send to.

申込み受付者は、（ｇ）送達された申込み用葉書Ｂを隠蔽シールＡを貼着した状態で、（ｈ）本発明の機密情報読取装置に申込み用葉書Ｂを導入して、該葉書Ｂの外面（表面）、隠蔽シールＡの外面に、管理番号印字手段１２により管理番号を印字した後、第１加熱手段１３、赤外光照明方式のイメージセンサー１４、第２加熱手段１５、必要に応じて可視光照明方式のイメージセンサー１６にて、それぞれ隠蔽シールＡを透して機密情報記載領域Ｓの機密情報ａを赤外光読み取り電子データとして読み取り、葉書Ｂの外面（表面）に印字された管理番号、及び、予め印刷、記載された文字、記号、絵柄等の通常情報ｂ、
隠蔽シール４の外面に予め印刷、記載された文字、記号、絵柄等の通常情報ｂを可視光読み取り電子データとして読み取る。 The application receptionist (g) introduces the application postcard B into the confidential information reader of the present invention with (g) the delivered application postcard B attached with the concealment seal A, and the postcard B After the management number is printed on the outer surface (front surface) and the outer surface of the concealment seal A by the management number printing means 12, the first heating means 13, the infrared light image sensor 14, the second heating means 15, and as necessary. In the visible light illumination type image sensor 16, the confidential information a in the confidential information description area S is read as infrared light electronic data through the concealment seal A and printed on the outer surface (front surface) of the postcard B. Management number and normal information b such as characters, symbols, designs etc. printed and described in advance
Normal information b such as characters, symbols, and patterns printed and described in advance on the outer surface of the concealment seal 4 is read as visible light electronic data.

続いて、（ｉ）赤外光読み取り電子データ（機密情報ａ）と、可視光読み取り電子データ（通常情報ｂ）との両電子データを、データ合成手段２１にてデータ合成し、データメモリ２２に記憶するとともに、パソコン、データサーバ等のＣＰＵ２３（データ演算制御手段）にて管理番号と共にデータ集計すると共に、（ｊ）申込み情報データベースとして記録、登録する。   Subsequently, (i) both the electronic data of the infrared light reading electronic data (confidential information a) and the visible light reading electronic data (normal information b) are combined by the data combining means 21 and stored in the data memory 22. The data is stored together with the management number by a CPU 23 (data calculation control means) such as a personal computer or a data server, and (j) is recorded and registered as an application information database.

一方、申込み受付者は、（ｋ）その申込み情報データベースからの申込み情報に基づいて、（ｌ）各々申込み者毎の申込み事項に基づく商品の調達、発送用の箱詰め、（ｍ）輸送車両への積み込み、（ｎ）保管施設への移送、配送を行うものである。   On the other hand, the applicant accepts (k) based on the application information from the application information database, (l) procurement of goods based on the application items for each applicant, packaging for shipping, and (m) transportation vehicle Loading, (n) Transfer and delivery to a storage facility.

（ａ）は本発明の機密情報隠蔽シートの一例を説明する側断面図、（ｂ）は書類に本発明の機密情報隠蔽シートを貼着した状態を説明する部分側断面図。(A) is a side sectional view explaining an example of the confidential information concealment sheet of the present invention, (b) is a partial side sectional view explaining a state where the confidential information concealment sheet of the present invention is attached to a document. 本発明の機密情報読取装置を説明する概要側面図。The outline side view explaining the confidential information reading device of the present invention. 本発明の機密情報読取装置の動作ブロック図。The operation | movement block diagram of the confidential information reader of this invention. 本発明の機密情報読取装置及び機密情報読取方法の一例を説明する工程図。Process drawing explaining an example of the confidential information reading apparatus and confidential information reading method of this invention.

符号の説明Explanation of symbols

Ａ…機密情報隠蔽シート
Ｂ…書類
１…基材シート
２…赤外光吸収透過性層２
３…オーバーコート層
４…不透明着色層
５…貼着層
ａ…機密情報
ｂ…通常情報
１０…シート搬送手段
１１…対向搬送ロール
１２…管理番号印字手段
１２ａ…シート通過検出用フォトセンサー
１３…第１加熱手段
１４…赤外光読取方式のイメージセンサー
１４ａ…赤外投光部
１４ｂ…赤外受光部
１５…第２加熱手段
１６…可視光読取方式のイメージセンサー
２１…データ合成手段
２２…データメモリ
２３…ＣＰＵ（データ演算制御部） ２４…デバイス制御部 A ... Confidential information concealment sheet B ... Document 1 ... Base sheet 2 ... Infrared light absorbing / transmitting layer 2
DESCRIPTION OF SYMBOLS 3 ... Overcoat layer 4 ... Opaque colored layer 5 ... Adhesion layer a ... Confidential information b ... Normal information 10 ... Sheet conveyance means 11 ... Opposite conveyance roll 12 ... Management number printing means 12a ... Photo sensor 13 for sheet passage detection ... No. 1 Heating means 14 ... Infrared light reading type image sensor 14a ... Infrared light projecting part 14b ... Infrared light receiving part 15 ... Second heating means 16 ... Visible light reading type image sensor 21 ... Data synthesizing means 22 ... Data memory 23 ... CPU (data calculation control unit) 24 ... Device control unit

Claims (10)

少なくとも可視光不透過性であって赤外光透過性の基材シート１の一面に、温度ｔ２ にて１秒間未満の熱エネルギーの付加の後に室温ｔ０（ｔ０＜ｔ２）まで急冷することにより赤外光吸収状態を呈し、温度ｔ１（ｔ１＜ｔ２）にて１秒間以上の熱エネルギーの付加の後に室温ｔ０（ｔ０＜ｔ１＜ｔ２）まで徐冷することにより赤外光透過状態を呈し、ロイコ化合物を含有する赤外光吸収透過性層２を設けたことを特徴とする機密情報隠蔽シール。 Rapid cooling to room temperature t 0 (t 0 <t 2 ) after application of thermal energy for at least one second at a temperature t 2 to one surface of the base sheet 1 that is at least visible light-impermeable and infrared-light transmissive exhibits an infrared light absorbing state, gradually cooled to room temperature t 0 (t 0 <t 1 <t 2) after the addition of the temperature t 1 (t 1 <t 2 ) at one second or more thermal energy by A secret information concealment seal characterized in that an infrared light transmitting state is provided, and an infrared light absorbing / transmitting layer 2 containing a leuco compound is provided. 少なくとも可視光不透過性であって赤外線透過性の基材シート１の一面に、温度ｔ２ にて１秒間未満の熱エネルギーの付加の後に室温ｔ０（ｔ ０ ＜ｔ２）まで急冷することにより赤外光吸収状態を呈し、温度ｔ１（ｔ１＜ｔ２）にて１秒間以上の熱エネルギーの付加の後に室温ｔ０（ｔ０＜ｔ１＜ｔ２）まで徐冷することにより赤外光透過状態を呈し、ロイコ化合物を含有する赤外光吸収透過性層２と該赤外光吸収透過性層２を保護するオーバーコート層３とを設け、前記基材シート１の他面に貼着層５を設けたことを特徴とする機密情報隠蔽シール。 Rapid cooling to room temperature t 0 (t 0 <t 2 ) after applying thermal energy for at least one second at a temperature t 2 to one surface of a base sheet 1 that is at least visible light-impermeable and infrared-transmissive. by exhibiting infrared light absorbing state, gradually cooled to room temperature t 0 (t 0 <t 1 <t 2) after the addition of the temperature t 1 (t 1 <t 2 ) over one second at the thermal energy by An infrared light transmitting and transmitting layer 2 containing a leuco compound and an overcoat layer 3 for protecting the infrared light absorbing and transmitting layer 2 are provided, and the other surface of the base sheet 1 is provided. A confidential information concealment seal characterized in that an adhesive layer 5 is provided on the cover. 請求項１又は２記載の隠蔽シールにおいて、少なくとも可視光不透過性であって赤外光透過性の前記基材シート１は、紙製シート又はプラスチック製シートであることを特徴とする機密情報隠蔽シール。   3. The concealment seal according to claim 1, wherein the base material sheet 1 which is at least visible light-impermeable and infrared light-transmissive is a paper sheet or a plastic sheet. sticker. 請求項１又は２記載の隠蔽シールにおいて、少なくとも可視光不透過性であって赤外光透過性の前記基材シート１は、不透明着色層４にて着色された紙製シート又はプラスチック製シートであることを特徴とする機密情報隠蔽シール。   3. The concealment seal according to claim 1, wherein the base material sheet 1 that is at least visible light-impermeable and infrared light-transmissive is a paper sheet or a plastic sheet colored with an opaque colored layer 4. Confidential information hiding seal characterized by being. 請求項１又は２記載の隠蔽シールにおいて、少なくとも可視光不透過性であって赤外光透過性の前記基材シート１は、不透明着色剤を混入して着色された紙製シート又はプラスチック製シートであることを特徴とする機密情報隠蔽シール。   3. The concealment seal according to claim 1, wherein the base sheet 1 that is at least visible light-impermeable and infrared-light transmissive is a paper sheet or plastic sheet that is colored by mixing an opaque colorant. A confidential information hiding seal characterized by 請求項１乃至５のいずれか１項記載の機密情報隠蔽シールが機密情報記載領域に貼着されて機密情報が隠蔽されていることを特徴とする情報記載書類。   6. An information description document, wherein the confidential information concealment seal according to any one of claims 1 to 5 is attached to a confidential information description area to conceal confidential information. 請求項６記載の情報記載書類の機密情報記載領域に貼着されて機密情報を隠蔽している機密情報隠蔽シールの表面を温度ｔ１にて１秒間以上加熱した後、室温ｔ０（ｔ０＜ｔ１）まで徐冷して、該隠蔽シール内面の前記赤外光吸収透過性層２を赤外光透過状態にする第１加熱手段と、該隠蔽シールを照明する赤外光域の光源を持つ赤外光照明方式のイメージセンサーと、前記隠蔽シールの表面を温度ｔ２（ｔ２＞ｔ１）にて１秒間未満再加熱した後、室温ｔ０（ｔ０＜ｔ２）まで急冷して、該隠蔽シール内面の前記赤外光吸収透過性層２を赤外光吸収状態にする第２加熱手段とを搭載し、前記赤外光照明方式のイメージセンサーにより隠蔽シールを透して機密情報を読み取るようにしたことを特徴とする機密情報読取装置。 After heating the surface of the confidential information concealment sticker, which is attached to the confidential information description area of the information description document according to claim 6 and concealing the confidential information, at the temperature t 1 for 1 second or more, the room temperature t 0 (t 0 A first heating means that gradually cools to <t 1 ) to bring the infrared light absorbing / transmitting layer 2 on the inner surface of the concealment seal into an infrared light transmission state; and an infrared light source that illuminates the concealment seal After reheating the surface of the infrared light illumination type image sensor and the concealment seal at a temperature t 2 (t 2 > t 1 ) for less than 1 second , it is rapidly cooled to room temperature t 0 (t 0 <t 2 ) And a second heating means for bringing the infrared light absorbing / transmitting layer 2 on the inner surface of the concealment seal into an infrared light absorption state, and passing through the concealment seal by the infrared light illumination type image sensor. A confidential information reading apparatus characterized in that confidential information is read. 請求項６記載の情報記載書類の機密情報記載領域に貼着されて機密情報を隠蔽している機密情報隠蔽シールの表面を温度ｔ１にて１秒間以上加熱した後、室温ｔ０（ｔ０＜ｔ１）まで徐冷して、該隠蔽シール内面の前記赤外光吸収透過性層２を赤外光透過状態にする第１加熱手段と、該隠蔽シールを照明する赤外光域の光源を持つ赤外光照明方式のイメージセンサーと、前記隠蔽シールの表面を温度ｔ２（ｔ２＞ｔ１）にて１秒間未満再加熱した後、室温ｔ０（ｔ０＜ｔ２）まで急冷して、該隠蔽シール内面の前記赤外光吸収透過性層２を赤外光吸収状態にする第２加熱手段と、可視光域の光源を持つ可視光照明方式のイメージセンサーとを搭載し、前記赤外光照明方式のイメージセンサーにより隠蔽シールを透して機密情報を読み取り、前記可視光照明方式のイメージセンサーにより隠蔽シール表面又は／及び情報記載書類表面に記載された機密情報以外の可視情報を読み取るようにしたことを特徴とする機密情報読取装置。 After heating the surface of the confidential information concealment sticker, which is attached to the confidential information description area of the information description document according to claim 6 and concealing the confidential information, at the temperature t 1 for 1 second or more, the room temperature t 0 (t 0 A first heating means that gradually cools to <t 1 ) to bring the infrared light absorbing / transmitting layer 2 on the inner surface of the concealment seal into an infrared light transmission state; and an infrared light source that illuminates the concealment seal After reheating the surface of the infrared light illumination type image sensor and the concealment seal at a temperature t 2 (t 2 > t 1 ) for less than 1 second , it is rapidly cooled to room temperature t 0 (t 0 <t 2 ) A second heating means for bringing the infrared light absorbing / transmitting layer 2 on the inner surface of the concealing seal into an infrared light absorbing state, and a visible light illumination type image sensor having a light source in a visible light region, Confidential information is transmitted through a concealment seal by the infrared light image sensor. A confidential information reading apparatus, wherein the visible information other than the confidential information described on the surface of the concealment seal and / or the information description document is read by the visible light illumination type image sensor. 請求項７記載の機密情報読取装置を用いて、情報記載書類の機密情報記載領域に貼着された機密情報隠蔽シールの表面を前記第１加熱手段により温度ｔ１にて１秒間以上加熱した後、室温ｔ０（ｔ０＜ｔ１）まで徐冷して、該隠蔽シール内面の赤外光吸収透過性層２を赤外光透過状態にした後、赤外光域の光源を持つ赤外光照明方式の前記イメージセンサーにて隠蔽シールを透して機密情報をイメージ読み込みし、続いて該隠蔽シールの表面を前記第２加熱手段により温度ｔ２（ｔ２＞ｔ１）にて１秒間未満再加熱した後、室温ｔ０（ｔ０＜ｔ２）まで急冷して、該隠蔽シール内面の赤外光吸収透過性層２を赤外光吸収状態にすることを特徴とする機密情報読取方法。 After heating the surface of the confidential information concealment sticker attached to the confidential information description area of the information description document by the first heating means at the temperature t 1 for 1 second or more using the confidential information reader according to claim 7. Then, after slowly cooling to room temperature t 0 (t 0 <t 1 ), the infrared light absorbing / transmitting layer 2 on the inner surface of the concealing seal is brought into an infrared light transmitting state, and then an infrared having a light source in the infrared light region is used. Confidential information is read through the concealment seal by the light illumination type image sensor, and then the surface of the concealment seal is heated by the second heating means at a temperature t 2 (t 2 > t 1 ) for 1 second. After reheating less than , the confidential information reading is characterized in that the infrared light absorbing / transmitting layer 2 on the inner surface of the concealment seal is brought into an infrared light absorbing state by rapidly cooling to room temperature t 0 (t 0 <t 2 ). Method. 請求項８記載の機密情報読取装置を用いて、情報記載書類の機密情報記載領域に貼着された機密情報隠蔽シールの表面を前記第１加熱手段により温度ｔ１にて１秒間以上加熱した後、室温ｔ０（ｔ０＜ｔ１）まで徐冷して、該隠蔽シール内面の赤外光吸収透過性層２を赤外光透過状態にした後、赤外光域の光源を持つ赤外光照明方式の前記イメージセンサーにて隠蔽シールを透して機密情報をイメージ読み込みし、続いて該隠蔽シールの表面を前記第２加熱手段により温度ｔ２（ｔ２＞ｔ１）にて１秒間未満再加熱した後、室温ｔ０（ｔ０＜ｔ２）まで急冷して、該隠蔽シール内面の赤外光吸収透過性層２を赤外光吸収状態にするとともに、前記可視光照明方式のイメージセンサーにより、該隠蔽シール表面又は／及び情報記載書類表面に記載された機密情報以外の可視情報をイメージ読み込みし、それら機密情報と機密情報以外の情報とを一つのイメージデータにデータ論理和（ＯＲ）にて合成して取り扱うことを特徴とする機密情報読取方法。 After heating the surface of the confidential information concealment sticker attached to the confidential information description area of the information description document by the first heating means at the temperature t 1 for 1 second or more using the confidential information reader according to claim 8. Then, after slowly cooling to room temperature t 0 (t 0 <t 1 ), the infrared light absorbing / transmitting layer 2 on the inner surface of the concealing seal is brought into an infrared light transmitting state, and then an infrared having a light source in the infrared light region is used. Confidential information is read through the concealment seal by the light illumination type image sensor, and then the surface of the concealment seal is heated by the second heating means at a temperature t 2 (t 2 > t 1 ) for 1 second. After reheating less than, it is rapidly cooled to room temperature t 0 (t 0 <t 2 ) to bring the infrared light absorbing / transmitting layer 2 on the inner surface of the concealing seal into an infrared light absorbing state, and Image sensor and / or information description by image sensor It is characterized in that visible information other than confidential information described on the surface of a document is read as an image, and the confidential information and information other than confidential information are combined into one image data by data logical sum (OR) and handled. Confidential information reading method.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0664314A (en) * 1992-08-25 1994-03-08 Toppan Printing Co Ltd Thermal recording medium
JPH06286294A (en) * 1993-04-06 1994-10-11 Toppan Printing Co Ltd Information carrier and information reproducer handling this carrier
JPH06324627A (en) * 1993-05-12 1994-11-25 Toppan Printing Co Ltd Information carrying member, information reproducing device handling the same and transfer foil and label used for production of information carrying member
JPH11263087A (en) * 1998-03-18 1999-09-28 Dainippon Printing Co Ltd Information recording medium

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0664314A (en) * 1992-08-25 1994-03-08 Toppan Printing Co Ltd Thermal recording medium
JPH06286294A (en) * 1993-04-06 1994-10-11 Toppan Printing Co Ltd Information carrier and information reproducer handling this carrier
JPH06324627A (en) * 1993-05-12 1994-11-25 Toppan Printing Co Ltd Information carrying member, information reproducing device handling the same and transfer foil and label used for production of information carrying member
JPH11263087A (en) * 1998-03-18 1999-09-28 Dainippon Printing Co Ltd Information recording medium

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