JP5162802B2 - Anti-counterfeiting patterns and securities using them - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a latent image pattern which is one of forgery preventing means applied to securities such as banknotes, stock certificates, gift certificates, and lotteries.
[0002]
[Prior art]
As anti-counterfeiting means, holoclam can be pasted on securities, watermarks can be placed on paper, latent image patterns can be displayed depending on the viewing position, micro characters and fine patterns that cannot be reproduced by copying, Various methods such as printing using ink, infrared absorbing ink, UV ink, and the like are applied in combination.
[0003]
As shown in FIG. 5, the latent image pattern, which is one of the forgery prevention means, is provided in a part of the securities (10) together with other forgery prevention means. Looking at this securities from directly above, the part (11) can only be recognized as a fine pattern, but if a latent image pattern is formed in this part with a fine uneven shape, the securities are tilted. Or moving the viewpoint direction, shadows due to unevenness occur, and the latent image pattern emerges and can be recognized. This portion is a latent image pattern display section (11).
[0004]
Various methods are used as a method for forming the uneven shape, and in particular, ink printing by intaglio printing or screen printing, or emboss press processing is generally employed.
[0005]
Conventionally, such a latent image pattern will be described by taking the character “2” as an example of the latent image pattern as shown in FIG. 6, and the region in which the latent image pattern is formed is linear in the horizontal (horizontal) angle direction. A fine uneven shape (12) is formed along the outside of the character “2” pattern, and a fine uneven shape (13) is formed along the vertical (vertical) line shape.
[0006]
Since the latent image pattern having such a configuration is formed with regular unevenness over the entire area of the latent image pattern, it is in a normal state (a state in which the latent image pattern is intended to be unrecognizable, for example, a vertical direction of a printed matter). The latent image may be visually recognized even when viewed from the direction.
[0007]
[Problems to be solved by the invention]
The present invention has been made paying attention to the above problems, and is a latent image pattern in which the latent image pattern cannot be easily visually recognized in a normal state, thereby preventing illegal acts such as forgery and tampering. It is an object to provide a forgery prevention pattern that can further enhance the effect.
[0008]
In order to solve the above-mentioned problem, the invention according to claim 1 is composed of a set of concave and convex patterns made up of arranged line groups , and a plurality of closed figures whose arrangement, shape, and size are random are formed, and a latent image is formed. The arrangement direction of the concavo-convex pattern line of the closed figure existing in the pattern forming area is different from the arrangement direction of the concavo-convex pattern line of the closed figure existing in the area not forming the latent image pattern. It is a forgery prevention pattern.
[0011]
According to the second aspect of the present invention, the arrangement direction of the concavo-convex pattern lines constituting the closed figure existing in the area where the latent image pattern is formed, and the closed figure existing in the area where the latent image pattern is not formed. The forgery-preventing pattern according to claim 1, wherein a difference in arrangement angle with the arrangement direction of the lines of the concavo-convex pattern constituting is about 90 °.
[0012]
The invention according to claim 3 is the forgery according to claim 1 or 2, wherein the line pitch of the uneven pattern is 5 to 20 lines / mm, and the height difference of the unevenness is 10 to 100 μm. It is a prevention pattern.
[0013]
The invention according to claim 4 is a securities characterized by providing the forgery prevention pattern according to any one of claims 1 to 3 .
[0014]
The latent image pattern is formed by a collection of circles, rectangles, ellipses, stars, or indeterminate closed figures, and the arrangement, shape, and size of the closed figures may be random, so it is easy in normal conditions. Will not be visible.
Further, the angular directions of the irregularities formed in the closed figure are not necessarily the same, and there is an allowable range of ± 10 °. Within this allowable range, the latent image pattern can be visually recognized without any trouble when observed from the same direction. Further, counterfeiting and tampering can be effectively prevented by changing the angular direction of the unevenness.
[0015]
In addition, the angular direction of the unevenness formed in the latent image pattern and the angular direction of the unevenness other than the latent image pattern must be visually recognized separately. For this reason, it is necessary to provide a difference between the two angles.
As this angle difference, the angle of the unevenness formed on the closed figure outside the latent image pattern is 20 ° or more smaller than the minimum angle direction of the unevenness formed on the closed figure inside the latent image pattern, or 20 ° or more larger than the maximum angle. Thus, the latent image pattern is separated and can be visually recognized.
The preferred difference between the two is that one is horizontal and the other is vertical, ie 90 °.
Further, the size of the closed figure may be the same, but changing the size is more convenient because it is more difficult to visually recognize in a normal state.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail.
[0017]
FIG. 1 is a plan view showing an example of a latent image pattern of the present invention.
As shown in FIG. 1A, when the number “2” is described as an example of the latent image pattern, the angle of the unevenness formed in a circle that is the closed figure (1) in the latent image pattern “2”. Is an angle of unevenness formed in a circle which is a closed figure (2) outside the latent image pattern.
When this is viewed by being gradually inclined in the left-right direction with respect to the paper surface, the latent image pattern is clearly visible as shown in FIG. 1B when a certain angle is reached.
[0018]
2A and 2B are diagrams for explaining a circular configuration that is the closed figure (1) in the latent image pattern of FIG. 1, in which FIG. 2A is a plan view, and FIG. 2B is a cross-sectional view of the XX section. That is, when the substrate is tilted by providing irregularities on the substrate (4), a shadow is generated and the image is viewed deeply. 2C is a diagram for explaining a configuration of a circle which is the latent image pattern outer closed figure (2) of FIG. 1, FIG. 3C is a plan view, and FIG. 4D is a cross-sectional view of a YY portion. .
In this way, by changing the angular direction of the unevenness, when one side produces a shadow by tilting or changing the observation position, the other does not produce a shadow and both are separated and visually recognized become.
[0019]
FIG. 3 shows another example of the latent image pattern. The angle of the circular unevenness, which is a closed figure in the latent image pattern, is changed within a range of ± 10 °, and the size of the circle, which is a closed figure outside the latent image pattern, is changed. The angle of the unevenness is changed accordingly.
In this example, 1B is rotated by + 10 ° clockwise with reference to the angle of the unevenness formed in a 1A circle, which is a closed figure in the latent image pattern, and 1C is rotated by −10 °. Further, 2B is obtained by rotating + 20 ° clockwise with reference to the irregularities formed in a circular shape of 2A that is a closed figure outside the latent image pattern, and 2C is rotated by −20 °.
[0020]
FIG. 4 is an example of another latent image pattern, in which the shape and size of a closed figure are changed. FIG. 4A shows the shape and size of the closed figure, and FIG. 4B shows the shape, size, and angular direction of the unevenness of the closed figure.
[0021]
In the above description, the angle of the unevenness formed on the closed figure inside the latent image pattern is vertical and the angle direction of the unevenness formed on the closed figure outside the latent image pattern is horizontal, but this is not restrictive. It is natural.
[0022]
In order to form this latent image pattern, as described above, the ink is formed in an intaglio printing method with a large ink film, or an uneven surface shape is formed by an ink film layer by a screen printing method, or a press method is used for a mold. In general, a usual method for forming a concavo-convex shape directly on a securities base material such as paper is used. The pitch of the concavo-convex shape is about 5 to 20 lines / mm, and the height difference of the concavo-convex shape is about 10 to 100 μm.
[0023]
【Effect of the invention】
As described above, the latent image pattern is formed by a set of closed figures, so that the latent image pattern cannot be easily visually recognized in a normal state.
Also, the angular directions of the irregularities do not necessarily have to be the same, and by changing them, it is possible to further enhance the effects of fraudulent acts such as forgery and tampering.
[Brief description of the drawings]
FIG. 1 is an example for explaining a latent image pattern of the present invention, (a) is a plan view of the latent image pattern, and (b) is a plan view showing a state in which a visible latent image pattern is visually recognized. .
FIG. 2 is a diagram for explaining the configuration of a closed figure that forms the latent image pattern of the present invention;
(A) is a plan view of a closed figure showing that the angle direction of the irregularities formed on the closed figure is vertical, (b) is a cross-sectional view of the section XX of (a), and (c) is formed on the closed figure. The top view of the figure which shows that the angular direction of the unevenness | corrugation formed is horizontal, (d) shows sectional drawing of the YY part of (c), respectively.
FIG. 3 is a plan view of an example showing another latent image pattern of the present invention.
FIG. 4 is a plan view of an example showing another latent image pattern of the present invention.
FIG. 5 is a plan view showing an example of securities provided with a latent image pattern.
FIG. 6 is a plan view showing an example of a conventional latent image pattern.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Latent image pattern inside closed figure 2 ... Latent image pattern outside closed figure 3 ... Unevenness 4 ... Base material 10 ... Securities 11 ... Latent image pattern display part 12, 13 ... Unevenness

Claims (4)

Consists of a set of concavo-convex patterns consisting of arranged line groups, multiple closed figures with random arrangement, shape, and size are formed, and an array of concavo-convex pattern lines of closed figures that exist within the area that forms the latent image pattern An anti-counterfeiting pattern characterized in that the direction and the arrangement direction of the lines of the concave / convex pattern of the closed figure existing in a region where the latent image pattern is not formed are different. The arrangement direction of the lines of uneven patterns forming closed graphic existing in the region for forming the latent image pattern, the arrangement direction of the lines of uneven patterns forming closed graphic existing in a region not forming a latent pattern The forgery prevention pattern according to claim 1, wherein a difference in arrangement angle is about 90 °. The forgery prevention pattern according to claim 1 or 2, wherein a line pitch of the uneven pattern is 5 to 20 lines / mm, and an uneven height difference is 10 to 100 µm.   A security comprising the anti-counterfeiting pattern according to any one of claims 1 to 3.

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