JPH0532306Y2 - - Google Patents

Description

[Detailed explanation of the idea]

Purpose of invention

[Industrial application field]

The present invention relates to carbonless forms that prevent forged copies.

[Conventional technology]

As a typical example of conventional carbonless forms, let's take forms related to the receipt of money, for example.
It basically consists of three sheets: the top sheet is an entry form for entering the deposit amount into a computer, the middle sheet is a receipt, and the bottom sheet is a receipt. The color development utilized any one of blue color development, black color development, and red color development. Now, one method of fraud using this form is to first cover the amount column on the top paper and the amount column on the bottom paper with tissue paper, etc., and write only the first digit of the official amount as the receipt amount. Then, the upper digit number is copied and entered only on the middle paper.
Next, when you remove the thin paper and write in the remaining digits, the official amount will be written only on the middle paper, and only the lower digit numbers will be written on the top and bottom papers. It is possible to hand over the middle paper with the correct amount written on it to the payer as a receipt, hand over the top and bottom papers with the false amount written on to the person who should receive it, and embezzle the difference. . In addition, fraud was committed by removing the middle paper, writing the correct amount as the receipt amount, handing it to the payer, stacking the top paper and bottom paper, writing a false amount on them, copying them, and embezzling the difference. will also be held. Therefore, there is a need for technology that can immediately detect forged copies of carbonless forms and confirm that they have been duly copied.

[Problem that the invention attempts to solve]

An object of the present invention is to meet the above-mentioned requirements and provide carbonless forms that can be easily determined as to whether they have been duly copied, and therefore prevent counterfeit copies. Structure of the idea

[Means to solve the problem]

To explain with reference to the drawings, the carbonless forms of the present invention, as shown in FIG. 2 and a bottom paper 3 having a color developer layer 31 on the surface thereof, in carbonless forms, the top paper 1
The color generated from the self-coloring transfer layer 11 of the middle paper 2 and the color generated by the combination of the color former capsule layer 21 of the middle paper 2 and the color developer capsule layer 31 of the bottom paper are different colors, and the color former capsule layer 21 is a different color. 2 of coloring agent capsules containing foamer
It is characterized by consisting of a mixture of more than one species. "Middle paper" is ordinary carbonless paper.
It refers to paper that has a color developer layer on the front side and a color former capsule layer on the back side, but here we use this term to mean paper that is between the top and bottom even if there is no color developer layer on the front side. There is. Paper having a self-coloring transfer layer 11 on the back side, which is used as a top paper, is available on the market. As the material for the top paper, commercially available high-quality paper, preferably thin paper, is used. Of course, OCR paper may also be used. The color former capsule layer 21 on the back side of the middle paper is formed by applying pressure-sensitive color former capsules manufactured according to known techniques to high-quality paper, copy paper, or the like. The technique of using a mixture of two or more coloring agent capsules containing different color formers is an invention already proposed by the present inventor (Japanese Patent Application No. 195213/1983).
Just follow the "Method for Manufacturing Pressure-Sensitive Copying Paper". By adjusting the mixing ratio of the color former capsules, it is possible to obtain a desired color tone between the two colors. The color developer layer 31 on the surface of the bottom paper is formed by applying a commonly used color developer to high-quality paper. Commercially available carbonless bottom paper is
Since it is coated with a color developer, it can be used as is for this purpose. In a typical example of the present invention, the form is related to the receipt of money, as described above, and is composed of three sheets: the top sheet is an input form, the middle sheet is a receipt, and the bottom sheet is a deposit slip. Of course, the present invention can also be applied to forms with four or more sheets.

[Effect]

Let us consider a case where the above-described fraud is carried out using the carbonless forms of the present invention. In other words, cover the amount column of the top paper 1, which is the input form, and the amount column of the bottom paper 3, which is the deposit receipt, with thin paper, etc., and then write only the first digit of the official amount as the receipt amount on top of the paper. Remove and fill in the remaining digits. The middle paper 2 displays the official receipt amount, but the top paper 1 and the bottom paper 3 display false amounts. However, since the back side of the top paper 1 of the input form is self-coloring, the genuine amount is written on it, and when it is compared with the bottom paper 3 of the deposit receipt, it becomes clear that it is a forgery. If thin paper is used as the top paper 1, which is the input form, the self-colored numbers on the back side can be seen from the front side of the paper, making it easy to detect forgeries. In a preferred embodiment of the present invention, in a three-sheet carbonless form, the coloring of the top paper, that is, the color transferred to the middle paper, and the coloring of the bottom paper are different colors, and the self-coloring of the top paper 1 An example in which the bottom paper 3 is blue and the bottom paper 3 is violet will be described below. Now, if you receive 25,000 yen from the payer and copy and write the official amount, as shown in Figure 2, the middle paper 2 of the receipt will display the amount of 25,000 yen in blue, and the bottom paper 3 of the receipt receipt will show the amount of 25,000 yen in blue. The amount of 25,000 yen is displayed in violet color. On the other hand, if you enter the regular amount of 25,000 yen using the above trick, as shown in Figure 3, the middle paper 2
The receipt amount is blue and the official amount is 25,000.
Yen is displayed, and a false amount of 5,000 yen is displayed on top paper 1 and bottom paper 3. (The latter is violet colored.) As already explained, the back side of the top paper 1 self-colors and the amount of 25,000 yen is written on it, making it clear that it is a forgery. Another fraudulent method is to take out the middle paper 2 of the receipt, write the amount received of 25,000 yen, and when the payer is not looking, overlap the top paper 1 of the input form and the bottom paper 3 of the deposit receipt to create a false amount. A copy of 5,000 yen will also be entered. In this case, as shown in Figure 4, the bottom paper 3 of the deposit receipt is colored blue.
The amount of 5000 yen will be displayed. The color of the bottom paper is different from the original violet color, so you can tell at a glance that it is a fake. None of the carbonless copying papers on the market produce neutral colors, neither blue nor red, so it is not possible to substitute other carbonless copying papers to produce violet colors. Therefore, forgery is impossible. Effects of the invention By using the carbonless forms of this invention, it is possible to check whether the created form is a legitimate copy or not, and whether the color of the characters, especially the color of the bottom paper, is a predetermined neutral color. This allows for immediate identification. As a result, it is highly effective in preventing forgery of forms.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view showing the structure of the carbonless forms of the present invention. Figures 2 to 4
The figures are perspective views for explaining the effects of the carbonless forms of the present invention. Figure 2 shows the correct usage, and Figures 3 and 4 show the results of incorrect usage. , respectively. DESCRIPTION OF SYMBOLS 1... Top paper, 2... Middle paper, 3... Bottom paper, 11... Self-coloring transfer layer, 21... Color former capsule layer, 31... Color developer layer.

Claims (1)

[Claims for Utility Model Registration] (1) Top paper 1 having a self-coloring transfer layer 11 on the back side, middle paper 2 having a color former capsule layer 21 on the back side, and bottom paper 3 having a color developer layer 31 on the front side. In carbonless forms that are stacked together, the color generated from the self-coloring transfer layer 11 of the top paper 1 and the color generated by the combination of the color former capsule layer 21 of the middle paper 2 and the color developer capsule layer 31 of the bottom paper are combined. with different colors,
Carbonless forms characterized in that the color former capsule layer 21 is made of a mixture of two or more types of color former capsules containing different color formers. (2) Carbonless forms as defined in Paragraph 1 of Claims for Utility Model Registration, in which the forms are related to the receipt of money, and the top paper is an entry form, the middle paper is a receipt, and the bottom paper is a receipt.