JPH06187523A - Information recording medium - Google Patents

Abstract

PURPOSE:To easily and surely discriminate the copied forgery of such information recording media as the claim checks, the membership cards, etc., of ordinary sheets. CONSTITUTION:An address column 4 where the visible issue number 3 and address 7 are written is provided on the surface of a claim check 1 together with an optical read information recording part 9 including a foundation part 10 which is entirely printed by the ink containing no carbon and a bar code 11 of a toner including carbon printed by a non-impact printer. A satisfactory difference of reflection factors is secured between the ink and the toner and therefore the code 11 can be read in regard of an infrared bar code reader which uses the wavelength of a near infrared area. If the check 1 is copied by an ordinary copying machine using the wavelength of an ultraviolet area or a visible light beam area, the reflection factors of both ink and toner parts are reduced. Therefore the copied code 11 cannot be read by the infrared bar code reader and a forged check 1 is decided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording medium for recording optically read information such as bar code and OCR information, and more particularly to an information recording medium suitable for preventing forgery by a copying machine such as a xerographic system.

[0002]

2. Description of the Related Art Conventionally, an information recording card disclosed in Japanese Utility Model Publication No. 4-26922 is known as an information recording medium of this type. This card has information recorded on the surface of a thermosensitive coloring medium such as a thermosensitive recording paper capable of coloring, which absorbs visible light wavelengths and transmits infrared light wavelengths, with ink which absorbs at least infrared light wavelengths. Therefore, the recorded information can be read by the infrared light detecting element and can also be visually inspected. When the heat-sensitive coloring medium is heated, the coloring makes it impossible to visually check the recorded information and also makes it impossible to copy the recorded information.

[0003]

However, in the above-mentioned conventional card, since the heat-sensitive coloring medium is used, it is possible to visually check or copy in a normal state. However, there is a drawback that this procedure is complicated.

The present invention solves this drawback by providing a deposit certificate,
The purpose is to provide information recording media such as membership cards, various vouchers, and various cash vouchers.

[0005]

The recording medium of the present invention generally uses ultraviolet rays or visible light having a short wavelength in a copying machine, whereas infrared rays or near infrared rays having a long wavelength are used in a bar code reader or an OCR reader. The visual information recording section and the optical reading information recording section are provided on the sheet, and the optical reading information recording section is a base section provided with a dark ink containing no carbon. And a toner containing carbon on the base portion, and an optical read information section for recording optical read information related to and / or related to the recorded contents of the visual information recording section. Is. The information to be recorded in the optically read information section is related to the information already recorded in the visual information recording section, or is previously recorded so as to be associated with information that is not recorded at present but is recorded in the future. , Or both are included. In addition, the ink in this specification means
In addition to printing ink, it is a general term for coloring agents for printing, printing, and printing black ink.

[0006]

By utilizing the difference in the wavelength of the light beam used, the contrast of the light received from the base portion and the optical reading information portion is sufficient with an optical reader such as a bar code reader or an OCR reader, and can be discriminated. But
In a copying machine, this is insufficient and the contents of the optically read information portion after copying cannot be read by the optical reader.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment in which the present invention is applied to a receipt will be described in detail below with reference to the accompanying drawings. Here, FIG. 1 is a plan view of the receipt, and FIG. 2 is a schematic A of FIG.
FIG. 3 is an enlarged cross-sectional view taken along the line A, and FIG.

As shown in FIG. 1, the deposit certificate 1 has a title 2 "deposit certificate", an issue number 3, an address entry field 4, a face value entry field 5 and an issuer name 6 printed in advance on the surface thereof. In use, an address 7 is entered in the address entry field 4 and a face value 8 of the deposit is entered in the face value entry field 5. The title 2, the issue number 3, the address 7 of the address entry field 4, the face value 8 of the face value entry field 5, and the issuer name 6 constitute a visual information recording unit.

Further, an optical reading information recording section 9 is provided on the surface of the deposit certificate 1, and the optical reading information recording section 9 includes a base section 10 provided by solid printing black ink containing no carbon. It is composed of an issue number 3 and a bar code 11 which is an optical reading information section for displaying a code number to be associated with the addressee, which is provided on the base portion 10 with a toner containing carbon by a non-impact printer. . The code number to be associated with the addressee is associated with the address 7 after the address 7 is entered in the address entry field 4 because there is no visual information associated with the barcode 11 when the barcode 11 is provided.

As shown in FIG. 3, in the ultraviolet region having a short wavelength and the visible light region having a wavelength of about 700 nm or less, the black ink not containing carbon and the toner toner containing carbon both have reflectances. Low, absorbs light,
Although it is identified as black, in the near-infrared region where the wavelength exceeds about 750 nm, the black ink not containing carbon has a high reflectance and is not identified as black. Therefore, in a general infrared barcode reader using a wavelength in this near infrared region, for example, about 780 nm or about 930 nm, black ink containing no carbon of the base portion 10 and toner containing carbon of the barcode 11 are used. Since the difference in reflectance is sufficient for reading accuracy, the base portion 10 and the barcode 11 can be distinguished from each other, and the barcode 11 can be read.

On the other hand, when the deposit certificate 1 is copied, since the copying machine makes a copy using a wavelength in the ultraviolet range or the visible range, the black portion not containing carbon and the carbon portion in the copy. What is the toner part that appears?
Both of them have low reflectance and the difference is insufficient in the reading accuracy of the infrared barcode reader, so that it becomes impossible to distinguish the base portion 10 and the barcode 11 with the infrared barcode reader, and the barcode 11 can be read. Can not.

As described above, in the present embodiment, the bar code 11 of the deposit certificate 1 cannot be read by the infrared bar code reader when copied, so it is extremely easy to determine whether the copy is forged or not. it can.

The present invention is not limited to the above-described embodiments. For example, as an ink not containing carbon, an infrared barcode reader, an infrared OCR reader or the like can be used in the near infrared region other than black ink. There is a sufficient difference in reflectance with the carbon-containing toner so that it can be read, but in the ultraviolet or visible light range, it cannot be read by an infrared barcode reader or infrared OCR reader. As long as the difference in reflectance between the toner containing carbon and the toner is small, a dark color system such as black or gray is generally suitable.
In addition to solid printing, the base portion 10 may be formed by providing a pattern or the like as in the case of tint block printing. further,
Optical reading information is not limited to barcode 11, but OCR
Information that can be read by an infrared OCR reader such as characters may be used. Furthermore, the optical read information may be directly related to the recorded contents of the visual recognition information recording unit or indirectly related to the recorded contents. Furthermore, the present invention provides a deposit certificate 1
It is needless to say that the invention can be applied to documents requiring anti-counterfeiting other than.

[0014]

As is apparent from the above description,
According to the present invention, which comprises an information recording medium having a visible information recording portion and an optical read information recording portion, the optical read information after copying is caused by the difference in reflectance determined in the wavelength region based on the presence or absence of carbon content. Since it is configured so that the contents of the section cannot be read by an optical reader, it is possible to easily and reliably determine whether the information recording medium is a genuine information recording medium or an improper information recording medium created by illegal copying. Play.

[Brief description of drawings]

FIG. 1 is a plan view of a receipt.

FIG. 2 is a partially enlarged cross-sectional view taken along the line AA of FIG.

FIG. 3 is an explanatory diagram showing a spectral reflectance characteristic of an optical read information recording section.

[Explanation of symbols]

 1 Custody certificate 3 Issue number 4 Address entry field 5 Face value entry field 7 Address 8 Face value 9 Optically read information recording section 10 Base section 11 Bar code

Continuation of front page (51) Int.Cl. ⁵ Identification number Office reference number FI Technical display location G06K 19/06 8623-5L G06K 19/00 A

Claims (1)

[Claims] 1. A visual information recording portion and an optical reading information recording portion are provided on a sheet, and the optical reading information recording portion comprises a base portion provided with a carbon-free dark ink and an upper portion of the base portion. An information recording medium comprising a toner containing carbon, and an optical read information section for recording optical read information related to and / or related to the recorded content of the visual recognition information recording section. .