JPH051159B2 - - Google Patents

Description

[Detailed description of the invention]

purpose of invention

[Industrial application field]

The present invention relates to counterfeit-proof securities that are difficult to forge and whose authenticity can be easily determined even if they are forged.

[Conventional technology]

Recently, electrophotographic printing devices called laser beam printers that perform electrostatic transfer and heat fixation of heat-fusible toner have become popular, and high-speed printing using non-impact printers has become possible. Needless to say, non-impact printers have the advantage of being noiseless. However, in laser beam printers that use infrared light irradiation fixing using a xenon lamp as a method to simplify the fixing mechanism and avoid unnecessary heating of the paper, the fixation of the hot melted toner to the paper is not very strong, so the impact Compared to printers, they have the disadvantage of being more easily tampered with. For this reason, important documents such as securities have not been printed using non-impact printers such as laser beam printers.

[Problems to be solved by the invention]

In view of the above circumstances, an object of the present invention is to transfer heat-fusible toner by an electrostatic method,
In securities, important information such as amount is printed using a non-impact printer that prints by irradiating infrared light and fixing it.
To provide securities that are prevented from forgery, whose printing is difficult to forge, and even when forged, it is easy to determine whether they are genuine or false. Composition of the invention

[Means to solve the problem]

The securities of the present invention are securities that are created by printing necessary information on paper by electrostatically transferring heat-fusible toner onto the paper and fixing it by irradiating it with infrared light. It is characterized in that a heat-sensitive coloring agent is applied to at least the printing area of the surface. Typical securities of the present invention include gift certificates,
These are cash certificates such as gift certificates and deposit refund certificates. Of course, common matters on the face of securities may be provided in advance by general printing. General printing is performed by any printing method such as letterpress printing or offset printing. Paper that is commonly used for securities such as high-quality paper, OCR paper, MICR paper, securities paper, non-impact printer paper, and colored high-quality paper may be used. As the heat-sensitive coloring agent, those commonly used for heat-sensitive recording paper and the like can be used. The heat-sensitive coloring agent can be applied to the paper by printing on the surface in required areas by gravure printing method or other printing means, or by part-coating or by coating the entire surface. At the stage of paper making or after,
The entire surface may be impregnated.

[Effect]

As shown in FIGS. 1A and B, heat-fusible toner 3A is transferred electrostatically to the amount column of paper 1 of securities to which heat-sensitive coloring agent 2A is applied. As shown in FIG. 2, when the number "123" is printed by irradiating and fixing infrared light from the xenon lamp 4, the heat-sensitive coloring material below the toner 3B absorbs the infrared light and melts. However, heat-sensitive coloring agent 2B developed color due to heat.
becomes. In addition, since infrared rays are reflected from the heat-sensitive coloring agent below the ink other than white or black ink, it does not receive heat and does not develop color. As shown in FIGS. 3A and 3B, when the number "1" is scratched off and a false number "9" is written in that part, the uncolored heat-sensitive coloring agent 2A around the character is also scratched off. When the entire amount column of the securities paper is heated, as shown in FIG.
The part where the correct number "1" was scratched off and the fake number "9" was written remains uncolored. Therefore,
It is immediately obvious that the correct numbers have been scratched out and fake numbers have been written down. Another method of counterfeiting is to place a polyester film on a cash voucher that has numbers printed in a similar shape, heat it with an iron, and then copy the numbers and transfer them to the blank spaces. Even if an attempt was made to do so, when the amount column was heated during transcription, the area around the letters would also develop color, and the act of forgery would be discovered. Anyone who has experienced this will never attempt to use this method of counterfeiting or use a counterfeit ticket again. Effects of the Invention The counterfeit-proof securities of the present invention are difficult to counterfeit due to the above-mentioned effects, and even if they are counterfeited, it is easy to determine whether they are genuine or false, and as a result, counterfeiting can be prevented. can. Although the present invention is applicable to various securities, it is particularly meaningful when applied to cash vouchers.

[Brief explanation of the drawing]

All the drawings are for explaining the function of preventing forgery in securities of the present invention. 1st
The figure is a schematic view showing a stage in which heat-fusible toner is transferred to the amount column by an electrostatic method, and A is a plan view and B is a cross-sectional view. FIG. 2 is a schematic cross-sectional view showing a stage of fixing by infrared light irradiation. FIG. 3 is a schematic view showing the stage in which correct numbers are deleted and false numbers are written, with A being a plan view and B being a sectional view. FIG. 4 is a schematic view showing the securities with the false numbers shown in FIG. 3 heated and colored, with A being a plan view and B being a sectional view. 1...Paper, 2A...Uncolored heat-sensitive coloring agent, 2
B, 2C: Thermosensitive coloring agent that developed color, 3A: Heat-melting toner, 3B: Toner that absorbed infrared light and melted, 4: Xenon lamp, 5: False number.

Claims (1)

[Claims] 1. Securities that are created by printing necessary information by transferring heat-fusible toner onto paper using an electrostatic method and fixing it by irradiating it with infrared light. 1. A security that prevents counterfeiting, characterized in that a heat-sensitive coloring agent is applied to at least the area on which printing is performed. 2. The security that prevents forgery as set forth in claim 1, which has a general print on the paper. 3. A security that prevents forgery as set forth in claim 1, wherein the security is a cash certificate.