JP7398638B2 - Special latent image pattern forming body - Google Patents

Description

The present invention relates to a special latent image pattern forming body, which can be used, for example, in banknotes, passports, securities, cards, valuable printed materials, etc. that require prevention of forgery and tampering. Regarding.

Due to their nature, banknotes, passports, securities, cards, valuable printed materials, etc. must be prevented from forgery and tampering. Techniques to prevent counterfeiting and tampering of such items include cutting by partially changing the thickness of the paper layer, placing special substances into the base material, embossing, printing, etc. Accordingly, a base material having concavo-convex lines is used.

Then, on the surface of the base material having uneven lines such as a parallel line pattern formed by punching, embossing, printing, etc., printing lines that are parallel or inclined to the uneven lines are printed. When the base material of the special latent image pattern formed body manufactured in this manner is observed from a direction at a predetermined angle, predetermined characters, designs, etc., which form the latent image pattern, are visually recognized. The applicant has obtained patents shown in Patent Documents 1 to 4 below regarding such special latent image pattern forming bodies.

The basic structure of a conventional special latent image pattern forming body will be explained with reference to the drawings.
As shown in FIG. 1(a), a concavo-convex image line 11 is formed on a base material (not shown) by punching, embossing, printing, etc., and the concave-convex image line 11 has the same color as the base material.

The concavo-convex image line 11 is shown in FIG. 1(b), which shows an enlarged view of the portion 11X from above, and FIG. 1(c), which shows a longitudinal section along the YY line in FIG. 1(b). As mentioned above, it has a convex cross-sectional structure as an example, and the center line 11CL corresponding to the ridgeline at the center position is located along the longitudinal direction.

Furthermore, a printing image 12 is formed on the base material as shown in FIG. This printing image line 12 is printed with a colored ink other than colorless, for example, by offset printing, and has a color different from that of the base material.

As shown in FIG. 3, the uneven image line 11 and the printed image line 12 are formed such that the uneven image line 11 is formed as a first layer, and the printed image line 12 is laminated thereon.

FIG. 4 shows the number "1" as an example of the latent image pattern formed by the special latent image pattern forming body. Note that the latent image pattern is not limited to numbers, but includes all kinds of patterns such as letters, figures, symbols, and patterns.

FIG. 5 shows a state in which the uneven image line 11 and the printed image line 12 at the position along the line XX in the latent image pattern "1" are arranged at the most desirable relative position in the special latent image pattern forming body. . Here, the distance from the uneven object line 11 to the printing object line 12 is assumed to be Z1, and the pitch between adjacent uneven object lines 11 is assumed to be P1. In addition, the area in the center of the figure where the latent image pattern is formed is area A, the areas at both left and right ends of the figure where the background pattern is formed are area B, and the outline where the pattern corresponding to the outline of the latent image pattern is formed. Let the area be C area.

When observing the base material by tilting it at a predetermined angle from the viewpoint E1, the printing object line 12 can be seen to some extent on the surface of the uneven object line 11 in areas A and C, but in the area B at both ends, the printing object line 12 is uneven. It is hidden by the drawing line 11 and cannot be visually recognized. As a result, the latent image pattern "1" like pattern 21 is visually recognized as a positive pattern.

Further, FIG. 6 shows the principle of visual recognition of the latent image pattern depending on the difference in observation angle with respect to the state shown in FIG. 5. FIG. 6(a) shows a viewpoint E1 from a small angle C between the viewpoint and the base material 4, a viewpoint E1' from a large angle A between the viewpoint and the base material 4, and further a view from the viewpoint E1 to the viewpoint E1'. The observation status of each angle A is shown. Further, FIG. 6(b) is a cross-sectional view showing the angles with respect to the base material from the viewpoint E1, the viewpoint E1', and from the viewpoint E1 to the viewpoint E1'.

As shown in FIGS. 6(a) and 6(b), in area A where the latent image pattern is formed, a part of the printing image 12 is visible from the blind spot of the uneven image 11 from the horizontal direction of the base material 4. From the viewpoint E1 of the angle C with the base material 4 up to the position and the area B forming the background, from directly above the base material 4 in the perpendicular direction, it becomes a blind spot of the uneven image line 11 and the printing image line 12. At the viewpoint E1' of angle A with respect to the base material 4 up to the position where a part of the latent image pattern is no longer visible, no latent image pattern can be confirmed. However, in the range of angle A between the viewpoint E1 and the viewpoint E1', a part of the printed image 12 becomes a blind spot due to the uneven image 11, and only a part is visible, and the latent image pattern can be confirmed as a negative pattern. . The larger this angle A, the wider the viewing angle at which the latent image pattern can be seen, making it easier for the viewer to see the latent image.

When observing the base material at a predetermined angle from a viewpoint E2 opposite to the viewpoint E1, the printing image 12 is hardly visible in the A area due to the uneven image 11, and the printing image is not visible in the B area and C area at both ends. The line 12 is clearly visible without being hidden by the uneven image 11. As a result, the latent image pattern "1" like pattern 22 is visually recognized as a negative pattern.

In the special latent image pattern forming body, FIG. This shows a state in which the pattern is arranged so that it can be seen to some extent. Here, the distance from the uneven object line 11 to the printing object line 12 is defined as Z2.

When observing the special latent image pattern forming body from the viewpoint E1 while tilting it at a predetermined angle, the printed image line 12 is hidden by the uneven image line 11 in the A area and cannot be seen in the B area and C area at both ends. is visible without being hidden by the uneven image line 11. As a result, the latent image pattern "1" like pattern 22 is visually recognized as a negative pattern. When the substrate is further tilted and observed, the printed lines 12 in areas A, B, and C are completely hidden by the concave and convex lines 11, and as shown in the pattern 24, the printed lines 12 are colored. The latent image pattern "1" is not visible at all because only the concavo-convex image line 11 of the same color as the base material is visible.

When observed from the viewpoint E2 with the base material tilted at a predetermined angle, the printed object line 12 in the A, B, and C areas is clearly visible without being hidden by the uneven object line 11 at all. As a result, the colored printing lines 12 are uniformly dispersed as shown in the pattern 23, similar to the state observed from directly above the base material, and the latent image pattern "1" is not visible at all.

FIG. 8 shows the most undesirable relative position between the uneven image line 11 and the printed image line 12 at the position along the line XX in the latent image pattern "1" in the special latent image pattern forming body, that is, the latent image This shows a state in which the pattern is placed so that it is not visible at all. Here, the distance from the uneven object line 11 to the printing object line 12 is defined as Z3.

When observing the substrate from the viewpoint E1 while tilting the base material at a predetermined angle, since the printing object line 12 and the uneven image line 11 are far apart, the printing object line 12 is similar to the uneven image in the A area, B area, and C area. It is visible without being hidden by the line 11. As a result, the colored printing lines 12 are uniformly dispersed as shown in the pattern 23, similar to the state observed from directly above the base material, and the latent image pattern "1" is not visible at all. When the substrate is further tilted and observed, the printing lines 12 in areas A, B, and C are completely hidden by the concave and convex lines 11, and the colored printing lines 12 are visible as shown in pattern α. The latent image pattern "1" is not visible at all because only the concavo-convex image line 11 of the same color as the base material is visible.

When observing the base material from the viewpoint E2 with the base material tilted at a predetermined angle, the printed image 12 in areas A, B, and C is not hidden at all by the uneven image 11 and is clearly visible, so that it is directly above the base material. Similarly to the state observed from 2000, the colored printing lines 12 are uniformly dispersed as shown in the pattern 23, and the latent image pattern "1" is not visible at all. When the base material is further tilted and observed, the printing lines 12 in areas A, B, and C are completely hidden by the concave and convex lines 11, and the colored printing lines 12 are visible as shown in pattern β. The latent image pattern "1" is not visible at all because only the concavo-convex image line 11 of the same color as the base material is visible.

Further, FIG. 9 shows the principle of visual recognition of the latent image pattern depending on the difference in observation angle with respect to the state shown in FIG. 8. FIG. 9(a) shows a viewpoint E1' from a small angle C between the viewpoint and the base material 4, a viewpoint E1 from a large angle A between the viewpoint and the base material 4, and further a view from the viewpoint E1 to the viewpoint E1'. The observation status of each angle A is shown. Moreover, FIG.9(b) shows the viewpoint E1', the viewpoint E1, and the angle with each base material from the viewpoint E1' to the viewpoint E1 as a cross-sectional view.

As shown in FIGS. 9(a) and 9(b), in the area A where the latent image pattern is formed, the printed image is viewed from directly above the base material 4 in the direction perpendicular to it, which is a blind spot of the uneven image line 11. Angle with the base material 4 to the position where a part of the line 12 is no longer visible From the viewpoint E1 of A and the area B forming the background, from the horizontal direction of the base material 4, from the blind spot of the uneven image line 11, print the print object line. At the viewpoint E1' at the angle C with respect to the base material 4 up to a position where a part of the pattern 12 is visible, no latent image pattern can be observed. However, in the range of angle A between the viewpoint E1' and the viewpoint E1, a part of the printed image line 12 becomes a blind spot due to the uneven image line 11 and only a part is visible, and the latent image pattern is confirmed as a negative pattern. can.

The range of angle A in which the latent image pattern can be confirmed from viewpoint E1 to viewpoint E1' at the desirable relative position explained using FIG. 6 is large, and from viewpoint E1 at the undesirable relative position explained using FIG. The range in which the latent image pattern can be confirmed from ' to viewpoint E1 is narrow. Therefore, in the present invention, the key point is to determine how large the angle A at which this latent image pattern can be seen can be ensured.

In this way, with conventional special latent image pattern formation bodies, if there is a misalignment in the relative position of the printed image and the uneven image, the latent image pattern cannot be seen, so both had to be placed with high precision. . As a result, costs have increased.

Patent No. 2615401 Patent No. 2600094 Patent No. 4734616 Patent No. 5062645

As described above, in the conventional special latent image pattern forming body, the relative positions of the printed image and the uneven image must be arranged with high precision, which has led to an increase in cost. In view of the above circumstances, the present invention has been devised to provide a special method that allows latent image patterns to be visually recognized without requiring high accuracy in the relative positions of printed image lines and uneven image lines, and as a result, reduces costs. An object of the present invention is to provide a latent image pattern forming body.

The special latent image pattern forming body of the present invention has a base material in which a latent image area in which a latent image pattern is formed and a background area are arranged, and a concave or convex cross section on the surface of the base material, Concave and convex lines that have the same color as the base material and are arranged along one direction at a predetermined pitch, and on the surface of the base material, have a different color from the base material and are arranged along one direction at a predetermined pitch. The uneven print line has a first uneven print line formed in the latent image area and a second uneven print line formed in the background area, and the uneven print line has a first uneven print line formed in the latent image area. Since the uneven image line and the second uneven image line have different phases and different positions relative to the printed image line, a latent image pattern is visible when the base material is tilted and observed, and the uneven image line is different from the second uneven image line. is a third uneven image line that is symmetrical to the first uneven image line with respect to the center line of the second uneven image line, or a first uneven image line that is symmetrical to the second uneven image line. It is characterized in that it further includes a fourth uneven drawing line that is line-symmetrical with respect to the center of the drawing line.

Further, in the special latent image pattern forming body of the present invention, an outline area is further provided between the background area and the latent image area, and the uneven image line has a phase that continuously changes in the outline area. It further includes a fifth uneven object line that is connected to the first uneven object line and the second uneven object line, and the uneven object line has a phase that continuously changes in the contour area and is connected to the second uneven object line. A sixth uneven object line connected to the third uneven object line, or a sixth uneven object line whose phase changes continuously and connects to the fourth uneven object line and the first uneven object line. It is further characterized by comprising:

Further, in the special latent image pattern forming body of the present invention, an outline area is further provided between the background area and the latent image area, and the uneven image line is in phase with the first uneven image line in the outline area. It further includes at least one seventh uneven image having a phase between the phase of the second uneven image and the third uneven image in the contour area. at least one eighth uneven image having a phase between that of the uneven image, or at least one eighth uneven image having a phase between the phase of the first uneven image and the fourth uneven image; The book is characterized by further comprising a ninth uneven drawing line of the book.

Further, the special latent image pattern forming body of the present invention is characterized in that the uneven image line is formed by scorching, embossing, printing, or the like.

According to the special latent image pattern forming body of the present invention, it is possible to visually recognize the latent image pattern without requiring high precision in the relative position of the printed image line and the uneven image line, and cost reduction is possible. be.

FIG. 2 is a plan view, a partially enlarged view, and a vertical cross-sectional view showing uneven image lines in a conventional special latent image pattern forming body. FIG. 3 is a plan view showing printed lines on the special latent image pattern forming body. FIG. 3 is a plan view showing the order of lamination in which printing lines are formed on top of the concavo-convex lines in the special latent image pattern forming body. FIG. 3 is an explanatory diagram showing an example of a latent image pattern formed by the same special latent image pattern forming body. FIG. 7 is a plan view showing a state in which the uneven image line and the printed image line are arranged at the most desirable relative positions in the special latent image pattern forming body. FIG. 3 is a plan view showing an observed state of the special latent image pattern forming body in which the concavo-convex image and the printed image are arranged at the most desirable relative positions. FIG. 7 is a plan view showing a state in which the uneven image line and the printed image line are arranged at slightly undesirable relative positions in the special latent image pattern forming body. FIG. 7 is a plan view showing a state in which the uneven image line and the printed image line are arranged at the most undesirable relative position in the special latent image pattern forming body. FIG. 7 is a plan view showing an observed state of the special latent image pattern forming body in which the concavo-convex image and the printed image are arranged at the most undesirable relative positions. FIG. 7 is a plan view showing uneven image lines in a special latent image pattern forming body as a comparative example. FIG. 2 is a plan view showing uneven image lines on the special latent image pattern forming body according to the first embodiment of the present invention. FIG. 3 is a plan view showing an example of the relative position of the uneven image line and the printed image line and the visual recognition state in the special latent image pattern forming body according to the first embodiment; FIG. 7 is a plan view showing another example of the relative position of the uneven image line and the printed image line and the visual recognition state in the special latent image pattern forming body according to the first embodiment; FIG. 7 is a plan view showing uneven image lines on a special latent image pattern forming body according to a second embodiment of the present invention. FIG. 7 is a plan view showing an example of the relative position of the uneven image line and the printed image line and the visual recognition state in the special latent image pattern forming body according to the second embodiment. FIG. 7 is a plan view showing uneven image lines on a special latent image pattern forming body according to a third embodiment of the present invention. FIG. 7 is a plan view showing an example of the relative position of the uneven image line and the printed image line and the visual recognition state in the special latent image pattern forming body according to the third embodiment;

A special latent image pattern forming body according to an embodiment of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below, but includes various forms within the scope of the claims.

(1) First Embodiment First, FIG. 10 shows a concavo-convex image on a special latent image pattern forming body as a comparative example. This comparative example corresponds to the conventional special latent image pattern forming body shown in FIG. It has uneven image lines 101 in the B area located at both left and right ends in the figure. Further, between the A area and the B area, a concavo-convex image line 103 is provided in the C area, in which something corresponding to the outline of the latent image pattern is formed.

The center of the uneven image line 101 coincides with the center line 101CL, and the center of the uneven image line 102 is shifted in the vertical direction in the figure with respect to the center line 101CL. It's off.

On the other hand, in the special latent image pattern forming body according to the first embodiment of the present invention, as shown in FIG. , has a concavo-convex image line 103A in the C region. The uneven image line 102A is provided so that its center is symmetrical with respect to the uneven image line 102 with respect to the center line 101CL, and the uneven image line 103A is provided so that its center is line-symmetrical with respect to the uneven image line 103. They are provided so as to be symmetrical with respect to the center line 101CL.

In the special latent image pattern forming body according to the first embodiment, an example of the relative position of the uneven image lines 101, 102, 102A and the printed image line 201 and the visual recognition state are shown in FIG. In this example, the printing object line 201 is located so that at least a portion thereof overlaps with the uneven object line 102A in the A area, and the printing object line 201 is positioned so as to at least partially overlap with the uneven object line 103A in the C area.

When the special latent image pattern forming body is tilted and observed from the E1 direction, the printed image line 201 can be seen in any of the A area, B area, and C area without being hidden by the uneven image lines 101, 102, 102A, 103, and 103A. As a result, the latent image pattern like the pattern 302 is not visually recognized, but only the colored line pattern formed by the printed lines 201 is visible. Furthermore, when the special latent image pattern forming body is tilted and observed, the printed image line 201 is hidden by the uneven image lines 102 and 102A in the A area and cannot be seen, and the printed image line 201 is hidden by the uneven image lines 101 and 103A in the B area and C area. , 103A. As a result, a latent image pattern like the pattern 301 is visually recognized in the negative.

Furthermore, when the special latent image pattern forming body is tilted and observed from the E2 direction opposite to the E1 direction, the printed image 201 is hidden by the uneven image lines 102 and 102A in the A area, but is not visible in the B and C areas. The image line 201 is visible without being hidden by the uneven image lines 101, 103, and 103A, and a latent image pattern like the pattern 301 is visually recognized in the negative.

Next, in the special latent image pattern forming body according to the first embodiment, other examples of the relative positions of the uneven image lines 101, 102, 102A, 103, 103A and the printed image line 201, and the visual recognition state. is shown in FIG.

In this example, the printing object line 201 is positioned so as to almost entirely overlap the uneven object line 102A in the A area and the uneven object line 103A in the C area.

When the special latent image pattern forming body is tilted and observed from the E1 direction, the printed image 201 is hidden by the uneven image lines 102 and 102A in area A and cannot be seen, but the uneven image lines 101, 103, and 103A are hidden in area B and C. Since the printed image line 201 can be seen without being hidden by the image, a latent image pattern like the pattern 301 can be visually recognized in the negative. Furthermore, when the special latent image pattern forming body is tilted and observed, the printed image 201 is hidden by the uneven objects 102, 102A, and 101 in areas A and B, and cannot be seen, and in the C area, the printed object 201 is hidden by the uneven objects 103. , 103A. Therefore, only the outline of the latent image pattern, such as pattern 304, is visible.

Furthermore, when the special latent image pattern forming body is tilted and observed from the E2 direction opposite to the E1 direction, the printed image line 201 is hidden by the uneven image line 101 in the B area and cannot be seen in the A area and C area. It is visible without being hidden by the uneven image lines 102, 102A, 103, and 103A, and a positive latent image pattern like the pattern 303 is visually recognized. Further, when the special latent image pattern forming body is tilted and observed, the printed object line 201 in the A area and the B area is hidden by the uneven image lines 102, 102A, and 101 and cannot be seen, and the printed object line 201 is hidden by the uneven image line 103 in the C area. , 103A. As a result, only the outline of the latent image pattern, such as the pattern 304, is visible.

In addition, as shown in FIG. 13, in the present invention, a concavo-convex object 102 arranged out of phase with the concave-convex object 101 and a concave-convex object line 102 arranged out of phase from the adjacent concave-convex object 101 102A may be shared. By sharing the uneven image line 102 and the uneven image line 102A in this way, it is also possible to set the pitch P1 between the uneven image lines 101 narrowly, and the latent image pattern can be formed within a narrow area. At the same time, it is possible to form a latent image pattern with high resolution. The same applies to other embodiments described later.

(2) Second Embodiment As shown in FIG. 14, the special latent image pattern forming body according to the second embodiment of the present invention has an uneven image 112 in area A and an uneven image in area B. It has 111. The center of the uneven image line 111 coincides with the center line 111CL, and the center of the uneven image line 112 is shifted in the vertical direction in the figure with respect to the center line 111CL. It's off.

In addition, in the first embodiment, the phase is continuously shifted between the uneven image 101 in the B area and the uneven image 102 in the A area, and the uneven image 101 and the uneven image 102 are different from each other. A concavo-convex image line 103 connecting the two is provided in the C area. In this C area, an outline corresponding to the latent image pattern formed in the A area is formed. On the other hand, in the second embodiment, the phase is intermittently shifted between the uneven image line 111 in area B and the uneven image line 112 in area A, and there is no area where a contour is formed.

The concavo-convex image line 112A is provided so that its center is symmetrical with respect to the concave-convex image line 112 with respect to the center line 111CL.

In the special latent image pattern forming body according to the second embodiment, an example of the relative position of the uneven image lines 111, 112, 112A and the printed image line 201 and the visual recognition state are shown in FIG.

In this example, the print object line 201 is located so as to at least partially overlap the uneven object line 112A in the A area.

When the special latent image pattern forming body is tilted and observed from the E1 direction, the printed image line 201 can be seen in any of the B area, A area, and C area without being hidden by the uneven image lines 111, 112, and 112A. As a result, the latent image pattern like the pattern 302 is not visually recognized, but only the colored parallel line pattern formed by the printed lines 201 is visible. Further, when the special latent image pattern forming body is tilted and observed, the printed image line 201 is hidden by the uneven image lines 112 and 112A in the A area and cannot be seen, and the printed image line 201 is visible without being hidden by the uneven image line 111 in the B area. . As a result, a latent image pattern like the pattern 301 is visually recognized in the negative.

Furthermore, when the special latent image pattern forming body is tilted and observed from the E2 direction opposite to the E1 direction, the printed image line 201 is hidden by the uneven image lines 112 and 112A in the A area and cannot be seen, and the printed image line 201 is not visible in the B area. It can be seen without being hidden by the uneven image line 111. As a result, a latent image pattern like the pattern 301 is visually recognized in the negative.

(3) Third Embodiment As shown in FIG. 16, the special latent image pattern forming body according to the third embodiment of the present invention has an uneven image 122 in the A area and an uneven image in the B area. 121, it has an uneven image line 123 in the C area.

The center of the uneven image line 121 coincides with the center line 121CL, and the center of the uneven image line 122 is shifted in the vertical direction in the figure with respect to the center line 121CL. It's off. In the first embodiment, C corresponds to the contour area in which the uneven image 103 whose phase is continuously shifted between the uneven image 101 of the B area and the uneven image 102 of the A area is provided. A region exists. The uneven object line 103 connects the uneven object line 101 and the uneven object line 102. Similarly, the uneven object line 103A connects the uneven object line 101 and the uneven object line 102A.

On the other hand, in the third embodiment, a contour area is provided with an uneven image 123 whose phase is intermittently shifted between an uneven image 121 in area B and an uneven image 122 in area A. A corresponding C area exists.

The uneven image line 122A is provided so that its center is symmetrical with respect to the uneven image line 122 with respect to the center line 121CL, and the uneven image line 123A is provided so that its center is symmetrical with respect to the uneven image line 123. They are arranged so as to be symmetrical with respect to the center line 121CL. In region C, the uneven image 123 has a phase between the uneven image 121 and the uneven image 122, and the uneven image 123A has a phase between the uneven image 121 and the uneven image 122A.

In the special latent image pattern forming body according to the third embodiment, an example of the relative position of the uneven image lines 121, 122, 122A, 123, 123A and the printed image line 201 and the visual recognition state are shown in FIG. show.

In this example, the print object line 201 is positioned so as to overlap a part of the uneven object line 122A in the A area and almost all of the uneven object line 123A in the C area.

When the special latent image pattern forming body is tilted and observed from the E1 direction, the printed image line 201 is hidden by the uneven image lines 122 and 122A in the A area and cannot be seen, but the printed image line 201 is hidden by the uneven image lines in the B area and C area. 121, 123, and 123A, the latent image pattern is visible without being hidden, and the latent image pattern like pattern 301 is visually recognized in the negative. Furthermore, when the special latent image pattern forming body is tilted and observed from the E1 direction, the printed image line 201 is hidden by the uneven image lines 122, 122A, and 121 in areas A and B and cannot be seen, and the printed image line 201 is uneven in area C. It can be seen without being hidden by the drawing lines 123 and 123A. Therefore, only the outline of the latent image pattern, such as pattern 304, is visible.

When the special latent image pattern forming body is tilted and observed from the E2 direction opposite to the E1 direction, the printed image line 201 is visible in the A area and C area without being hidden by the uneven image lines 122, 122A, 123, and 123A, and the B area is visible. In this case, the printed image line 201 is hidden by the uneven image line 121 and cannot be seen, and a positive latent image pattern like the pattern 303 is visible. Further, when the special latent image pattern forming body is tilted and observed, the printed image line 201 in the A area and the B area is hidden by the uneven image lines 122, 122A, and 121 and cannot be seen, and the printed image line 201 in the C area is hidden by the uneven image line 123. , 123A. As a result, only the outline of the latent image pattern, such as the pattern 304, is visible.

As explained above, according to the present embodiment, it is possible to visually recognize the latent image pattern without requiring high accuracy in the relative position of the printed image line and the uneven image line, thereby reducing costs. can be reduced.

Although the embodiment of the present invention has been described, this embodiment is presented as an example and is not intended to limit the technical scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. This embodiment and its modifications are included within the technical scope and gist of the invention, as well as within the scope of the invention described in the claims and its equivalents.

For example, in FIG. 11, the uneven objects 102 and 102A, and 103 and 103A may each have the same object width as the uneven object line 101. However, when a concavo-convex image is formed by punching, embossing, printing, etc., the density and light transmittance may change compared to a location where a concavo-convex image is not formed. Therefore, in order to reduce the influence of such a change on visibility, for example, the sum of the line widths of the uneven image 102 and the uneven image 102A matches that of the uneven image 101, and similarly the uneven image 103 and the uneven image line 103A may be formed so that the total line width of the uneven image line 103A matches that of the uneven image line 101. Thereby, the area ratio of the concave-convex image per unit area does not change depending on whether the concave-convex image lines 102A, 103A are provided, and the influence on visibility can be alleviated.

Further, in the first embodiment, a concavo-convex image line 102A that is line symmetrical to the concave-convex image line 102 is formed in the area A where the latent image pattern is formed, and in the second embodiment, the concave-convex image line 102A is formed in the area A where the latent image pattern is formed. A concavo-convex image line 112A that is line symmetrical with the image line 112 is formed, and in the third embodiment, a concave-convex image line 122A that is line symmetrical with the concave-convex image line 122 is formed in the A area where the latent image pattern is formed. are doing. However, instead of the A area, in the B area where the background pattern is formed, uneven objects may be formed which are line symmetrical to the uneven objects 101, 111, and 121, respectively.

11, 101, 102, 103, 111, 112, 121, 122, 123, 102A, 103A, 112A, 123A Concave and convex drawing lines 101CL, 111CL, 121CL Center line 12, 201 Printing drawing lines 301 to 304 Pattern 4 Base material E1, E2 Viewpoint A Area B where the latent image pattern is formed Area C where the background pattern is formed Area C where the outline pattern is formed

Claims (4)

a base material on which a latent image area in which a latent image pattern is formed and a background area are arranged;
Concave and convex lines having a concave cross section or a convex cross section, having the same color as the base material, and arranged along one direction at a predetermined pitch on the surface of the base material;
Printed lines having a different color from the base material and arranged along the one direction at the predetermined pitch on the surface of the base material;
Equipped with
The uneven image line has a first uneven image line formed in the latent image area and a second uneven image line formed in the background area, and the first uneven image line and the first uneven image line have a second uneven image line formed in the background area. The latent image pattern is visually recognized when the base material is tilted and observed because the respective phases are different from the uneven image lines of No. 2 and the relative positions with respect to the printing image line are different,
The uneven image line is a third uneven image line that is symmetrical with respect to the first uneven image line with respect to the center line of the second uneven image line, or the second uneven image line. On the other hand, the special latent image pattern forming body further comprises a fourth uneven image line that is line symmetrical with respect to the center of the first uneven image line. A contour area is further provided between the background area and the latent image area,
The uneven image further includes a fifth uneven image whose phase changes continuously in the outline region and connects to the first uneven image and the second uneven image,
The uneven image is a sixth uneven image whose phase changes continuously in the contour area and connects to the second uneven image and the third uneven image, or a sixth uneven image whose phase is continuous. 2. The special latent image pattern forming body according to claim 1, further comprising a sixth uneven image line that changes to connect the fourth uneven image line and the first uneven image line. A contour area is further provided between the background area and the latent image area,
The uneven image further includes at least one seventh uneven image having a phase between the phase of the first uneven image and the phase of the second uneven image in the contour area. ,
The uneven image is at least one eighth uneven image having a phase between the phase of the second uneven image and the phase of the third uneven image in the outline region, or The special method according to claim 1, further comprising at least one ninth uneven object line having a phase between the phase of the first uneven object line and the phase of the fourth uneven object line. Latent image pattern forming body. 4. The special latent image pattern forming body according to claim 1, wherein the uneven image line is formed by any one of inking, embossing, and printing.

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