JP3963240B2 - Anti-counterfeiting form - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a forgery-preventing form in which a forgery-preventing image that is difficult to discriminate in a normal use state is printed in advance on a form, and a genuine form or a forged form can be identified based on the presence or absence of this image.
[0002]
[Prior art]
As shown in FIG. 3, a conventional anti-counterfeit form prints an anti-counterfeit image 20 such as characters and patterns on a paper form sheet 10 with relatively inconspicuous dotted lines, halftone dots, wavy lines, etc. The camouflage tint block 30 such as dotted lines, halftone dots, and wavy lines is printed with thermochromic ink to hide the forgery-preventing image 20 so that it cannot be discriminated (see FIG. 3A). In order to confirm the authenticity of the form, heat is applied to the camouflage pattern 30 of the form by touching it with a finger or the like, the temperature of the form is raised, and the camouflage pattern 30 is changed to transparent (FIG. 3B). )), It is confirmed that the forgery prevention image 20 appears and can be recognized as a real form.
[0003]
[Problems to be solved by the invention]
In the forgery prevention form, halftone dots and dotted lines are used for the forgery prevention image 20, and patterns such as halftone dots and dotted lines are also used for the camouflage background pattern 30. In order to hide the forgery prevention image 20, the forgery prevention image 20 is used. The printing position of the camouflaged tint 30 and the halftone dots and dotted lines of 20 must overlap well, and it takes time and labor to align the anti-counterfeit image 20 and the camouflaged tint 30 with each other. Sex was very bad. In addition, characters and patterns are limited to background patterns such as halftone dots and dotted lines, and the degree of freedom of design is limited. Even if the camouflaged background pattern 30 becomes transparent, the forgery prevention image 20 that appears is difficult to recognize. was there.
[0004]
The present invention provides an anti-counterfeit form that solves the above-mentioned problems, has good productivity in the printing process of an anti-counterfeit image and a camouflage background pattern, has a high degree of design freedom, and is easy to recognize the anti-counterfeit image. It is.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the invention of claim 1 includes an anti-counterfeit image printed with a watermark printing ink on a form sheet, and a concealed print layer printed with a thermochromic ink on a portion of the anti-counterfeit image It was characterized by comprising.
[0006]
According to a second aspect of the present invention, in the first aspect of the invention, the concealed printing layer is monochromatic.
[0007]
In the anti-counterfeiting form of claim 1, since the anti-counterfeiting image becomes a watermark, it is colorless, the color of the thermochromic ink used for the concealed printing layer can be freely used, and the shape of the pattern is not limited. . The hidden printing layer need not be halftone dots or dotted lines, and can be a free image.
[0008]
In the forgery-preventing form according to claim 2, the concealment printing layer may be made a single color without a pattern or may be a concealment printing layer with an arbitrary pattern using a single color to simplify the process. it can.
[0009]
The “image” in the present invention includes characters, patterns, figures, photographs and the like.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of a forgery prevention form according to the present invention will be described below with reference to the drawings.
[0011]
FIG. 1 is a sectional view showing an embodiment of a forgery prevention form according to the present invention, and FIG. 2 is a plan view of the forgery prevention form of FIG.
[0012]
In FIG. 1, reference numeral 1 denotes a paper form sheet such as a slip, a ticket, a cash voucher, etc., on which an anti-counterfeit image 2 or 2 is printed with watermark printing ink, and further, with thermochromic ink. A hidden printing layer 3 having a pattern formed thereon is printed.
[0013]
Unimark ink TS-B (trade name, manufactured by Teikoku Mfg. Co., Ltd.) was used as the watermark printing ink used for the anti-counterfeit image 2. This unimark ink TS-B is a kind of non-drying oil, is colorless, and penetrates the paper of the sheet 1 when printed on the form sheet 1, and the printed part can be seen through when viewed through this. Therefore, it becomes a “watermark”.
[0014]
The thermochromic ink used for the cover-up printing layer 3 is a two-color ink that causes a reversible color change reaction, which is light blue and light green at room temperature, and becomes transparent when the temperature rises when touched by hand.
[0015]
Although the forgery prevention form of the present invention is not shown on the form sheet 1, the form of the form is printed with ink of a predetermined color, and the anti-counterfeit image 2 and the concealment printing are provided in the margin of the form. Layer 3 is printed. In addition, when this forgery prevention form is normally used, individual writing and printing may be further added to the form of the form depending on the application.
[0016]
As shown in FIG. 2A, the forgery prevention image 2 is hidden by the hidden printing layer 3 and cannot be recognized. In order to check whether or not the used form is genuine, the portion of the concealed printing layer 3 is touched with a finger. The thermochromic ink of the concealed printing layer 3 increases in temperature due to the warmth of the finger and turns transparent. As a result, as shown in FIG. 2B, it is possible to confirm that the forgery prevention image 2 is raised and is a genuine form.
[0017]
In addition, although the hidden printing layer 3 of FIG. 2 has shown the example which consists of the pattern 3a, 3b which combined the color of two colors, this hidden printing layer 3 is a dark or light uniform monochrome printing, Alternatively, it can be used freely even in printing of a plurality of colors in combination with light and shade. Since the anti-counterfeit image 2 with watermark ink is colorless and inconspicuous, it is not necessary to camouflage the concealed print layer 3 concealing it with a pattern similar to the anti-counterfeit image 2 and so on. Of course, the anti-counterfeit image 2 can be sufficiently hidden even with a light single color, and even when a pattern is used, a tint block or other design can be freely adopted regardless of the characters of the anti-counterfeit image 2. The color of the hidden printing layer 3 can also be freely selected.
[0018]
【The invention's effect】
As described above, the present invention has the following effects.
[0019]
(1) According to the first aspect of the present invention, the concealment printing in which the watermark-printed, forgery-preventing image that can be recognized when viewed through the watermark is printed with a thermochromic ink colored at room temperature. Because it is completely hidden in the layer, as in the conventional anti-counterfeiting form, use anti-counterfeit images using halftone dots and dotted lines, etc., and use anti-counterfeit images such as halftone dots and dotted lines on the concealed printed layer. There is no need to camouflage, and the color and pattern of the hidden print layer can be designed freely. In printing, since it is not necessary to accurately position the forgery-preventing image and the concealed printing layer, productivity is improved. Since the anti-counterfeit image can be drawn with a continuous line or surface, if the thermochromic ink is made transparent by warming with a finger or the like, the anti-counterfeit image can be clearly seen through.
[0020]
(2) According to the invention described in claim 2, the process can be simplified by using a monochromatic image for the concealed printing layer.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of a forgery prevention form according to the present invention.
FIGS. 2A and 2B are main part plan views showing an example of an anti-counterfeit image of the anti-counterfeit form of FIG. 1, in which FIG. 2A shows a normal use state where the anti-counterfeit image cannot be seen, and FIG. A state in which the anti-counterfeit image is raised by heating with the like is shown.
FIGS. 3A and 3B are plan views showing a main part of a conventional anti-counterfeit form, in which FIG. 3A shows a normal use state where an anti-counterfeit image cannot be seen, and FIG. Each state where the image is raised is shown.
[Explanation of symbols]
1 Form sheet 2 Anti-counterfeit image 3 Hidden printing layer

Claims (2)

An anti-counterfeit form comprising an anti-counterfeit image printed with a watermark printing ink on a form sheet, and a concealed print layer printed with a thermochromic ink on at least a portion of the anti-counterfeit image. The forgery prevention form according to claim 1, wherein the concealed printing layer is monochromatic.

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