JP2007196410A - Image forming body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To relate to an image forming body to be applied to valuables, to which antifalsification, authenticity judgment and duplication prevention are inevitable. <P>SOLUTION: In this image forming body, a latent image region and a background region are provided on a base material. In the latent image region and the background region, dot-like recesses and dot-like projections are formed by embossing in an alternately arranged matrix under the condition that the predetermined pitches between the projections in the latent image region and in the background region are one and the same pitch and, at the same time, their phases are staggered to each other. Holes bored so as to pass through the base material have the predetermined pitch both in the latent image region and in the background region and, at the same time, are formed in a matrix so as to have one and the same phase and the holes to be formed in the background region are formed in either a region where only the recesses are included or in a region where only the projections are included, while the holes formed on the latent image region are formed in the other region. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to an image forming body that is applied to a valuable item such as banknote, passport, card, product tag, brand protection, etc. for which anti-counterfeiting, authenticity determination, and copy protection are required.

Valuables such as banknotes, passports, cards, product tags, and brand protection are not easily counterfeited or altered due to their nature, and a technical element that can determine whether the valuables are genuine is required. For example, as one of the technical elements, there is known a technique in which a latent image is visually recognized by observing a valuable item while being tilted, and authenticity determination is performed based on the presence or absence of the visual recognition. For example, a technology in which a printed image line is formed on a material having a concavo-convex shape formed by printing or the shape of a base material, and a latent image formed of the concavo-convex shape can be visually recognized when observed by tilting with reflected light. In addition, there is a technique in which the latent image is visually recognized when the shape and arrangement of the perforations are made different between the background region and the latent image region, and the tilted image is observed with transmitted light.

  As a technique for forming a printed image line on a material having a concavo-convex shape formed by the printing shape and viewing a latent image formed of the concavo-convex shape when observed by tilting with reflected light, for example, a part of the printing material The printed lines are printed with various line patterns, or relief patterns, or both patterns, which are expressed by different angles, raised with ink of the same or similar color as the printing material. Either various line-drawing lines or halftone-dotting lines having a certain interval on the line, or both of the drawing lines, are printed with respect to the printing drawing line by the color of the printing drawing line and other colored inks other than colorless and transparent. When viewed from the front by printing with parallel or inclined, it is possible to confirm only one of the various lines or halftone lines or the two lines with the constant spacing, from an oblique direction. Observation Then, the pattern constituted by the raised image line can be easily confirmed by the non-constant positional relationship generated between the raised printed image line and the printed image line having the certain interval, and the reverse oblique direction. A latent image printed matter is disclosed in which the light and darkness of the pattern can be reversed and confirmed when observed from (Patent Document 1).

As a technique for forming a printed image line on a material having a concavo-convex shape formed by the shape of the substrate and observing the image with a concavo-convex shape when observed by tilting with reflected light, for example, a partial angle Various materials other than the color of the material and colorless and transparent to the material having the uneven shape formed by embossing any of the various line patterns, or relief patterns, or both patterns representing the pattern by making different Depending on the color of the ink, either one of the various line-drawing lines or dot-dotting lines with a constant interval, or both of the line-drawing lines may be parallel or inclined with respect to the part constituting the part other than the above-mentioned pattern having the concavo-convex shape. When printed from the front, when viewed from the front, only one of the various line-drawing lines or halftone-dotting lines composed of straight lines with a fixed interval, or both drawing lines, can be confirmed. As a result, the pattern formed by the concavo-convex shape can be easily confirmed by the non-constant positional relationship generated between the concavo-convex shape and the printed image line having the constant interval, and observed from the opposite oblique direction. A latent image pattern formed body is disclosed in which the light and darkness of a pattern can be reversed and confirmed (Patent Document 2).

As a technique for forming a perforated shape, arrangement, etc. in the background area and the latent image area on the base material, and observing the image by tilting with transmitted light, the latent image can be visually recognized. To make a latent image appear, for example, on a base material, fine perforations constituting the background portion and perforations constituting the information portion are formed, and perforations in the background portion and the information portion are perforated. The shape, size, and pixel angle are formed so that at least one of them is different, and when the authenticity determination formed body is observed with reflected light, the background portion and the information portion cannot be distinguished and cannot be visually recognized. A technique is disclosed in which the background portion and the information portion are visually recognized when observed by the method (Patent Document 3).

Japanese Patent No. 2600094 (page 1-6, FIG. 1-10) Japanese Patent No. 2615401 (page 1-4, FIG. 2-7) Japanese Patent No. 3385461 (page 1-5, Fig. 1-3)

The above-mentioned Patent No. 2600094 and Patent No. 2615401 are irregular when a printed image line is formed on a material having an irregular shape formed by printing or the shape of a substrate and observed by tilting with reflected light from a specific direction. This is a technique that allows a latent image having a shape to be visually recognized. Japanese Patent No. 2600094 cannot visually recognize a latent image formed of a concavo-convex shape when observed from the vertical direction with transmitted light with respect to the substrate. Japanese Patent No. 2615401 has a problem that it is difficult to visually recognize a latent image formed of emboss when observed by tilting with transmitted light with respect to a base material. In the above-mentioned Japanese Patent No. 3385461, the background image and the latent image region are formed on the base material with different shapes and arrangements of the perforations, and the latent image is visually recognized when observed by tilting with transmitted light. When the substrate was observed from the vertical direction with transmitted light, the latent image could not be visually recognized. In addition, there is a problem that a latent image is difficult to visually recognize when tilted with reflected light. Furthermore, the shape and arrangement of the perforations in the latent image area and the background area must be different. For these reasons, Japanese Patent No. 2600094, Japanese Patent No. 2615401, and Japanese Patent No. 3385461 can visually recognize a latent image only under limited conditions. Japanese Patent No. 2600094 and Japanese Patent No. 2615401 disclose that a latent image is visually recognized from one surface, and in order to make the latent image visible from both sides, printed images are printed on the front and back surfaces. It was necessary to form a line.

The present invention is intended to solve such a conventional problem, and it is not possible to visually recognize a latent image only under limited conditions, and without forming a printed image line on the front and back surfaces. The latent image is visually recognized from both the front and back surfaces, and the reflected light and transmitted light are formed without forming the latent image by perforation without changing the shape and arrangement of the perforations in the latent image area and the background area. It is an object of the present invention to propose an image forming body in which a latent image is visually recognized when tilted and can be viewed without being observed from a specific direction.

The present invention is an image forming body having a latent image region and a background region on a substrate, and the latent image region and the background region are matrixed alternately by dot-like concave portions and dot-like convex portions by embossing. Perforations formed so as to penetrate through the base material, the predetermined pitch between the convex portions of the latent image area and the background area being the same pitch and out of phase. In the image region and the background region, the perforations formed in the background region having the predetermined pitch and in the same phase and formed in the background region are formed in either the concave portion or the convex portion. The image forming body is characterized in that the perforations formed and formed in the latent image region are formed in the other region.

The image according to claim 1, wherein the cross-sectional shape of the dot-shaped concave portion and the dot-shaped convex portion is formed in a triangular shape, a saddle shape, a trapezoidal shape, or a quadrangular shape. It is a formed body.

In the present invention, the pitch between the dot-shaped convex portions is in the range of 150 to 1500 μm, the pitch of the perforations is in the range of 150 to 1500 μm, and the diameter of the perforations is in the range of 50 to 500 μm. The image forming body is characterized by the above.

In the image forming body of the present invention, the latent image is visually recognized under a plurality of conditions, the latent image is visually recognized from both the front and back surfaces, and the image forming body is tilted and observed with reflected light and transmitted light. In this case, the latent image is visually recognized, and it is possible to determine whether the latent image is visible or not, and whether the latent image is visible under a plurality of conditions. Furthermore, since the latent image can be visually recognized even if it is tilted from 360 degrees and observed, authenticity can be easily determined. Therefore, it is possible to determine authenticity based on whether or not the above-described effect can be obtained on the spot without using a special authenticity determination device or the like.

The perforation which is a configuration of the present invention does not need to be different in the shape and arrangement of the perforation in the latent image area and the background area as in the conventional Japanese Patent No. 3385461. It can be formed even if the shape of the perforations is the same, and can be formed even if the arrangement is at regular intervals. Therefore, it takes less time for designing the arrangement of perforations than in the past.

From the above, the image forming body of the present invention has a high authenticity discrimination effect, and has an effect of preventing falsification and duplication because it is formed by fine perforations. Forgery of banknotes, passports, cards, product tags, brand protection, etc. It can be applied to valuables that require prevention and tampering prevention.

The best mode for carrying out the present invention will be described with reference to the drawings. However, the present invention is not limited to the best mode for carrying out the invention described below, and includes various other embodiments within the scope of the technical idea described in the scope of claims.

The uneven | corrugated shape which forms the embossing which is the structure of this invention is demonstrated using FIG. The embossed image having the configuration of the present invention can be implemented in the form of FIGS. 1A to 1C, and the printed image having the configuration of the present invention can be implemented in the form of FIG. 1A. is there.

In FIG. 1A, trapezoidal convex portions 3a higher than the base height 1a of the surface of the substrate 1 are repeatedly arranged at specific intervals, and the convex portions 3a are repeatedly arranged at specific intervals to thereby form the concave portions 2a. Is formed. The region of the convex portion 3a is the range of the region 3 as shown in FIG. 1A, and the region of the concave portion 2a is the range of the region 2 as shown in FIG. The convex portion 3 a is formed higher than the base height 1 a on the surface of the base material 1, and the lowest portion of the concave portion 2 a is the base height 1 a on the surface of the base material 1.

In FIG. 1B, trapezoidal concave portions 2b lower than the base height 1b of the surface of the substrate 1 are repeatedly arranged at specific intervals, and the concave portions 2b are repeatedly arranged at specific intervals, whereby the convex portions 3b are formed. It is formed. The region of the concave portion 2b is the range of the region 2 as shown in FIG. 1B, and the region of the convex portion 3b is the range of the region 3 as shown in FIG. The concave portion 2 b is formed lower than the base height 1 b on the surface of the base material 1, and the highest portion of the convex portion 3 b is the base height 1 b on the surface of the base material 1.

In FIG. 1C, trapezoidal convex portions 3c higher than the base height 1c on the surface of the base material 1 are repeatedly arranged at specific intervals, and the trapezoidal shape lower than the base height 1c on the surface of the base material 1 is shown. The concave portions 2c are repeatedly arranged at specific intervals. The region of the convex portion 3c is the range of the region 3 as shown in FIG. 1 (c), and the region of the concave portion 2c is the range of the region 2 as shown in FIG. 1 (c).

The configuration of FIG. 1 can be used for image forming bodies A1 and A2 shown below. As shown in FIG. 1, a concave portion and a convex portion are formed on the front surface and the back surface of the substrate 1. The embossed image according to the configuration of the present invention is produced by applying pressure to paper or the like by a press machine capable of producing embossing. Examples of the substrate include paper and plastic. In addition, an image can be formed by injection molding or the like. As for the thickness of the base material 1, 60-800 micrometers is preferable. Moreover, it is preferable that the uneven | corrugated difference of the convex part 3 and the recessed part 2 is about 10 micrometers-500 micrometers.

Next, the concavo-convex cross-sectional shape which is the configuration of the present invention will be described with reference to FIG. FIG. 2A shows a triangular convex portion 3. FIG. 2B shows a triangular recess 2. FIG. 2C shows a trapezoidal convex portion 3. FIG. 2D shows a trapezoidal recess 2. FIG. 2E shows a quadrangular convex portion 3. FIG. 2 (f) shows a rectangular recess 2. FIG. 2G shows a bowl-shaped convex portion 3. FIG. 2H shows a bowl-shaped recess 2. FIG. 2 (i) shows a convex portion 3 having a right triangle shape. FIG. 2J shows a concave portion 2 having a right triangle shape. Although the shape as shown in FIG. 2 can be considered as the shape of the concave portion and the convex portion, which is the configuration of the present invention, the present invention is not limited to this. Further, it can be formed by combining FIGS. 2A to 2J.

(Image forming body A1)
FIG. 3 shows an image forming body A1 and a partially enlarged view thereof. A predetermined area 5 on the display surface of the substrate 1 is provided, and an embossed image 4 a is formed in the predetermined area 5. The embossed image 4a is divided into a first region that becomes the background region 7 and a second region that becomes the latent image region 8, and the dots of the concave portions 2a and the dots of the convex portions 3a are formed in the first region that becomes the background region 7. The dots of the concave portions 2b and the dots of the convex portions 3b are alternately arranged in a matrix at a predetermined pitch in the second region, which becomes the latent image region 8, alternately arranged in a matrix at a predetermined pitch, and has an uneven shape. Formed. The embossed image 4a is produced with the cross-sectional shape of FIG. Further, the predetermined pitch of the concave portion 2a and the convex portion 3a serving as the background region 7 and the predetermined pitch of the concave portion 2b and the convex portion 3b serving as the latent image region 8 are formed at the same pitch and out of phase. The The predetermined pitch for the background region 7 and the predetermined pitch for the latent image region 8 are the same pitch, and are preferably shifted from each other by approximately a half pitch. It is preferable that the dot of the recessed part 2a and the dot of the recessed part 2b are the same depth. The image forming body A1 is formed by arranging the perforations 9 penetrating the base material at a predetermined pitch in the first area to be the background area 7 and the second area to be the latent image area 8 in a line shape. The perforations 9 formed so as to penetrate the substrate 1 have the same predetermined pitch as the concave and convex portions in the latent image region 8 and the background region 7 and have the same phase (the latent image region 8 and the background region). 7 has no perforation shift). The perforations 9a formed in the first region to be the background region 7 are formed along the concave portion 2a, and the perforations 9b formed in the second region to be the latent image region 8 are formed along the convex portion 3b. Is done. In other words, the perforations 9 a formed in the first region that becomes the background region 7 are formed along the concave portion that is the lowest portion of the substrate 1, and the perforations 9 b that are formed in the second region that becomes the latent image region 8. Is formed along the convex portion which is the highest portion of the substrate 1. The effect of the image forming body A1 will be described below.

When the image forming body A1 is observed from the vertical direction with respect to the image forming body A1 with reflected light as shown in FIG. 4 (a), the embossed image 4a is visually recognized as shown in FIG. 4 (b). Only the perforation group 10 is visible. Embossing is generally a technique that can be visually recognized with reflected light, but the embossed image 4a is camouflaged by the perforations 9, and thus is difficult to visually recognize with the naked eye. Further, since the perforations 9 penetrate through the base material, a contrast is generated between the region where the perforations 9 are formed and the region where the perforations 9 are not formed, so that the perforation group 10 is visible.

When the image forming body A1 is observed with the naked eye with reflected light as shown in FIG. 5A at a specific angle from the X1, X2, X3, or X4 directions shown in FIG. ), The latent image 8 made up of the embossed image 4a can be visually recognized. As shown in FIG. 5C, the perforations 9b formed on the dots of the convex portions 3b of the latent image area 8 can be seen as they are, but the perforations 9a formed on the dots of the concave portions 2a of the background area 7 These are blocked by the dots of the convex portions 3a and cannot be visually recognized. For this reason, only the perforations 9b formed in the dots of the convex portions 3b of the latent image region 8 are visible, and the latent image (T) formed by the perforations 9b can be visually recognized. The visible direction is not limited to the X1 direction, the X2 direction, the X3 direction, or the X4 direction, and the latent image can be visually recognized by observing from 360 degrees from any direction.

When the image forming body A1 is observed from the vertical direction with respect to the image forming body A1 with the naked eye with transmitted light as shown in FIG. 6A, the embossed image 4a is visually recognized as shown in FIG. 6B. Only the perforation group 10 is visible. Embossing is generally a technique that can be visually recognized with reflected light, and the embossing is difficult to visually recognize on a base material that can obtain a large amount of transmitted light. Furthermore, since the embossed image 4a is camouflaged by the perforations 9, the embossed image 4a is in a state that is difficult to visually recognize with the naked eye.

When the image forming body A1 is observed with the naked eye with transmitted light as shown in FIG. 7A at a specific angle from the X1, X2, X3, or X4 directions shown in FIG. ), The latent image 8 made up of the embossed image 4a can be visually recognized. As shown in FIG. 7C, the transmitted light of the perforations 9b formed on the dots of the convex portions 3b of the latent image region 8 can be seen as it is, but is formed on the dots of the concave portions 2a of the background region 7. The light transmitted through the perforations 9a is blocked by the dots of the convex portions 3a and cannot be visually recognized, or the amount of transmitted light decreases. For this reason, the transmitted light of the perforations 9b formed on the dots of the convex portions 3b of the latent image region 8 is visually recognized, and the latent image (T) formed by the transmitted light of the perforations 9b can be visually recognized. The visible direction is not limited to the X1 direction, the X2 direction, the X3 direction, or the X4 direction, and the latent image can be visually recognized by observing from 360 degrees from any direction.

On the back surface of the image forming body A1, the dots of the concave portions 2a formed on the front surface become convex portions, the dots of the convex portions 3a formed on the front surface become concave portions, the dots of the concave portions 2b formed on the front surface become convex portions, The dots of the convex portions 3c formed on the surface become concave portions. Therefore, the back surface of the base material is the back surface of the image forming body A1, and the perforations formed in the first region serving as the background region are formed along the convex portion and formed in the second region serving as the latent image region. A perforation is formed along the recess. When the rear surface of the image forming body A1 is observed with the naked eye with reflected light or transmitted light in a specific direction and a specific angle, a latent image formed of an embossed image can be visually recognized. The perforations formed in the convex dots in the background area can be viewed as they are, but the perforations formed in the concave dots in the latent image area are blocked by the convex dots and cannot be viewed. For this reason, only the perforations formed in the convex dots in the background area are visible, and the latent image (T) formed by the perforations can be visually recognized. That is, the negative and positive images are visually recognized by reversing from the latent image confirmed from the surface of the image forming body 1.

(Image forming body A2)
FIG. 8 shows an image forming body A2 and a partially enlarged view thereof. A predetermined area 5 on the display surface of the substrate 1 is provided, and an embossed image 4 b is formed in the predetermined area 5. The embossed image 4b is divided into a first area that becomes the background area 7 and a second area that becomes the latent image area 8, and the first inclined area 11a and the second inclined area are divided into the first area that becomes the background area 7. Protrusions having first inclined regions 11a and second inclined regions 11b in the second region to be the latent image region 8, in which dots of the convex portions 3a having the regions 11b are alternately arranged in a matrix at a predetermined pitch. The dots of 3b are alternately arranged in a matrix at a predetermined pitch, and are formed with an uneven shape. The embossed image 4b is produced with the cross-sectional shape of FIG. Furthermore, the predetermined pitch of the convex portions 3a serving as the background region 7 and the predetermined pitch of the convex portions 3b serving as the latent image region 8 are formed at the same pitch and out of phase. The predetermined pitch for the background region 7 and the predetermined pitch for the latent image region 8 are the same pitch, and are preferably shifted from each other by approximately a half pitch. It is preferable that the dot of the recessed part 2a and the dot of the recessed part 2b are the same depth. The image forming body A2 is formed by arranging the perforations 9 penetrating through the base material at a predetermined pitch in the first area serving as the background area 7 and the second area serving as the latent image area 8 in a line shape. The perforations 9 formed so as to penetrate the substrate 1 have the same predetermined pitch as the concave and convex portions in the latent image region 8 and the background region 7 and have the same phase (the latent image region 8 and the background region). 7 has no perforation shift). The perforations 9a formed in the first region to be the background region 7 are formed along the convex portion 3a, and the perforations 9b formed in the second region to be the latent image region 8 are formed along the concave portion 2b. Is done. In other words, the perforations 9 a formed in the first region that becomes the background region 7 are formed along the convex portion that is the highest portion of the substrate 1, and the perforations formed in the second region that becomes the latent image region 8. 9b is formed along the recess which is the lowest part of the substrate 1. The effect of the image forming body A2 will be described below.

When the image forming body A2 is observed from the vertical direction with respect to the image forming body A2 with reflected light as shown in FIG. 9A, the embossed image 4b is visually recognized as shown in FIG. 9B. Only the perforation group 10 is visible. Embossing is generally a technique that can be visually recognized with reflected light. However, since the embossed image 4b is camouflaged by the perforations 9, it is difficult to visually recognize with the naked eye. Further, since the perforations 9 penetrate through the base material, a contrast is generated between the region where the perforations 9 are formed and the region where the perforations 9 are not formed, so that the perforation group 10 is visible.

When the image forming body A2 is observed with the reflected light as shown in FIG. 10A at a specific angle from the X1, X2, X3, or X4 directions shown in FIG. ), The latent image 8 made up of the embossed image 4a can be visually recognized. As shown in FIG. 10C, the perforations 9a formed on the dots of the convex portions 3a in the background area 7 can be seen as they are, but the perforations 9b formed on the dots of the concave portions 2b in the latent image area 8 are , They are blocked by the dots of the convex portions 3b and cannot be visually recognized. For this reason, only the perforations 9a formed in the dots of the convex portions 3a in the background region 7 are visible, and the latent image (T) formed by the perforations ab can be visually recognized. The visible direction is not limited to the X1 direction, the X2 direction, the X3 direction, or the X4 direction, and the latent image can be visually recognized by observing from 360 degrees from any direction.

On the back surface of the image forming body A2, the dots of the concave portions 2a formed on the front surface become convex portions, the dots of the convex portions 3a formed on the front surface become concave portions, and the dots of the concave portions 2b formed on the front surface become convex portions, The dots of the convex portions 3c formed on the surface become concave portions. Therefore, the back surface of the base material is the back surface of the image forming body A2, and the perforations formed in the first region serving as the background region are formed along the concave portion and formed in the second region serving as the latent image region. The perforations are formed along the convex portions. When the rear surface of the image forming body A2 is observed with the naked eye with reflected light or transmitted light in a specific direction and a specific angle, a latent image formed of an embossed image can be visually recognized. The perforations formed on the convex dots in the latent image area can be viewed as they are, but the perforations formed in the concave dots on the background area are blocked by the convex dots and cannot be viewed. For this reason, only the perforations formed on the convex dots of the latent image region are visible, and the latent image (T) formed by the perforations can be visually recognized. That is, the negative and positive images are visually recognized by reversing from the latent image confirmed from the surface of the image forming body 2.

When the image forming body A2 is observed from the vertical direction with respect to the image forming body A2 with the naked eye with transmitted light as shown in FIG. 11 (a), the embossed image 4b is visually recognized as shown in FIG. 11 (b). Only the perforation group 10 is visible. Embossing is generally a technique that can be visually recognized with reflected light, and the embossing is difficult to visually recognize on a base material that can obtain a large amount of transmitted light. Furthermore, since the embossed image 4b is camouflaged by the perforations 9, the embossed image 4b is in a state that is difficult to visually recognize with the naked eye.

When the image forming body A2 is observed with the naked eye with transmitted light as shown in FIG. 12A at a specific angle from the X1, X2, X3, or X4 directions shown in FIG. ), The latent image 8 made up of the embossed image 4a can be visually recognized. As shown in FIG. 12C, the transmitted light of the perforations 9a formed on the dots of the convex portions 3a of the background area 7 can be visually recognized as it is, but formed on the dots of the concave portions 2b of the latent image area 8. The transmitted light from the perforations 9b is blocked by the dots of the convex portions 3b and cannot be visually recognized, or the amount of transmitted light decreases. For this reason, the transmitted light of the perforations 9a formed on the dots of the convex portions 3a in the background region 7 is visually recognized, and the latent image (T) formed by the transmitted light of the perforated abs can be visually recognized. The visible direction is not limited to the X1 direction, the X2 direction, the X3 direction, or the X4 direction, and the latent image can be visually recognized by observing from 360 degrees from any direction.

Next, an example of the positional relationship between the concavo-convex shape forming the embossed image and the perforation will be described with reference to FIG. As shown in FIG. 13A, the perforations 9 a are formed in the dots of the concave portions 2 a that become the background region 7, and the perforations 9 b are formed in the highest portion of the dots of the convex portions 3 b that become the latent image region 8. Further, the perforations 9a may be formed at the highest part of the dots of the convex portions 3a serving as the background region 7, and the perforations 9b may be formed at the dots of the concave portions 2b serving as the latent image regions 8 (not shown). In addition, you may form the perforation formed in a recessed part in the lowest part (not shown).

As shown in FIG. 13B, the perforations 9 a are formed in the dots of the concave portions 2 a that become the background region 7, and the perforations 9 b are formed in the second inclined region 11 b of the convex portion 3 b that becomes the latent image region 8. is there. Further, the perforations 9a may be formed in the dots of the concave portions 2a that become the background region 7, and the perforations 9b may be formed in the first inclined regions 11b of the convex portions 3b that become the latent image regions 8 (not shown). Further, the perforations 9a may be formed in the second inclined region 11b of the convex portion 3a serving as the background region 7, and the perforations 9b may be formed in the dots of the concave portion 2b serving as the latent image region 8 (not shown). Further, the perforations 9a may be formed in the first inclined region 11b of the convex portion 3a serving as the background region 7, and the perforations 9b may be formed in the dots of the concave portion 2b serving as the latent image region 8 (not shown). In addition, you may form the perforation formed in a recessed part in the lowest part (not shown).

To summarize FIG. 13 above, the perforations formed in the background area in the case of the embossed image are arranged along one of the concave and convex portions of the concavo-convex shape of the background area and formed in the latent image area. The perforations may be arranged along the other region.

The width in the longitudinal direction of the convex portion is preferably in the range of about 50 μm to 500 μm, the width in the width direction is preferably in the range of about 50 μm to 500 μm, and the width in the longitudinal direction of the concave portion is preferably in the range of about 50 μm to 500 μm. The width is preferably in the range of about 50 μm to 500 μm. It is preferable that the pitch of a convex part and a recessed part is the range of about 100-1500 micrometers.

The perforation pitch is preferably about 3: 1 to 1: 3. More preferably, the perforation pitch is about 1: 1. The diameter of the perforations is not particularly limited, but is preferably about 50 μm to 500 μm. If it is smaller than 50 μm, it will be difficult to produce, and if it is larger than 500 μm, it will be easy to replicate and the forgery prevention effect will be reduced. By gradually changing the size of the perforations, brightness and darkness can be obtained in the latent image described later. Therefore, the pitch in the X direction and the pitch in the Y direction of the perforations 9 are preferably in the range of about 100 to 1500 μm. The shape of the perforation is not particularly limited, and can be manufactured in a circular shape, a polygonal shape, a special shape, or the like, and these can be combined. As shown in FIG. 14, the character (A) may be formed by a fine perforation group, the characters may be arranged at a predetermined pitch, and the perforations having a special shape (character: A) may be arranged at a predetermined pitch. Good. The perforation can be produced by a laser processing machine, and the type of laser is not particularly limited. The perforations are preferably formed in a direction perpendicular to the substrate. However, even if the perforations are formed in an oblique direction with respect to the base material, the observation angle is different from that in which the perforations are formed in a direction perpendicular to the base material, but the effect of the present invention can be obtained. Moreover, as shown to Fig.15 (a), the diameter of perforation may become small with respect to the depth direction of a base material. Further, as shown in FIG. 15B, perforation may be performed in an oblique direction with respect to the base material. Moreover, the perforation group 10 can form a character, a pattern, etc., as shown to Fig.16 (a). As shown in FIG. 16B, the diameters of the perforations may be different.

The substrate used in the present invention is a paper substrate when an embossed image is formed. In the case of forming a print image, although not particularly limited, such as paper sheets and plastics, a substrate other than transparent is preferable. The thickness of the base material is not particularly limited, and it is effective for a thin base material of about 60 μm to a card base material of about 800 μm.

  Since the latent image formed in the latent image area of the present invention is at least one of letters, numbers, symbols, and patterns, authenticity can be easily determined when observed from a specific direction. Naturally, it is possible to print on the image forming body of the present invention.

  EXAMPLES Hereinafter, although this invention is demonstrated further in detail using an Example, the content of this invention is not limited to the range of these Examples.

Example 1
It was formed on a paper substrate having a thickness of about 100 μm having an embossed image in a predetermined area by an embossing press. The embossed image is divided into a first area serving as a background area and a second area serving as a latent image area. The first area serving as a background area has a concave portion having a width in the longitudinal direction of 300 μm and a width in the width direction of 300 μm. , And dots in the convex direction with a width of 300 μm in the longitudinal direction and a width of 300 μm in the width direction are alternately arranged in a matrix at a predetermined pitch, and the second area that becomes the latent image area starts from the pitch of the background area. Shifting 300 μm, the longitudinal width is 300 μm, the width width is 300 μm concave dots, and the longitudinal width is 300 μm, the width width is 300 μm convex dots alternately in a matrix at a predetermined pitch Arranged. The perforations formed in the first area serving as the background area are formed in the shape of dots along the recesses in the background area, and the perforations formed in the second area serving as the latent image area are convex in the latent image area. An image forming body of Example 1 was obtained by forming a dot shape along the portion. The pitch of the perforations formed in the dot shape is 600 μm, and the diameter of the perforations is 150 μm (see FIG. 3).

When the image forming body of Example 1 is observed from the vertical direction with respect to the image forming body of Example 1 with the naked eye with transmitted light or reflected light, the embossed image cannot be visually recognized, and only the perforated group is visually recognized. It was. The embossed image could be visually recognized as a latent image even when observed with the naked eye at a specific angle from 360 degrees with reflected light or transmitted light. When the image forming body of Example 1 was observed with transmitted light from the vertical direction with the naked eye, the embossed image was visible. On the front and back sides, the negative / positive of the latent image was reversed and confirmed.

(Example 2)
It was formed on a paper substrate having a thickness of about 80 μm having an embossed image in a predetermined area by an embossing press. The embossed image is divided into a first area serving as a background area and a second area serving as a latent image area. The first area serving as a background area has a recess having a width in the longitudinal direction of 250 μm and a width in the width direction of 250 μm. Dots and convex dots having a width in the longitudinal direction of 250 μm and a width in the width direction of 250 μm are alternately arranged in a matrix at a predetermined pitch, and the second area serving as a latent image area is determined from the pitch of the background area. Shifted by 250 μm, the width in the longitudinal direction is 250 μm, the width in the width direction is 250 μm, and the dots in the length direction are 250 μm, the width in the width direction is 250 μm. Arranged. The perforations formed in the first area serving as the background area are formed in the shape of dots along the convex portions of the background area, and the perforations formed in the second area serving as the latent image area are formed in the latent image area. An image forming body of Example 2 was obtained by forming a dot shape along the recess. The pitch of the perforations formed in the dot shape is 500 μm, and the diameter of the perforations is 150 μm (see FIG. 8).

When the image forming body of Example 2 is observed from the vertical direction with respect to the image forming body of Example 2 with the naked eye with transmitted light or reflected light, the embossed image cannot be visually recognized, and only the perforated group is visually recognized. It was. The embossed image could be visually recognized as a latent image even when observed with the naked eye at a specific angle from 360 degrees with reflected light or transmitted light. When the image forming body of Example 2 was observed with transmitted light from the vertical direction with the naked eye, the embossed image was visible. On the front and back sides, the negative / positive of the latent image was reversed and confirmed.

It is description about the uneven | corrugated shape which forms the embossed image or printed image which is the structure of this invention. It is description about the uneven | corrugated shaped cross-sectional shape which is a structure of this invention. It is a figure which shows image forming body A1 and its one part enlarged view. It is a figure which shows the case where it observes from the orthogonal | vertical direction with respect to image forming body A1 with the naked eye with reflected light. It is a figure which shows the case where it observes from the specific angle with respect to image forming body A1 with the naked eye with reflected light. It is a figure which shows the case where it observes from the orthogonal | vertical direction with respect to image forming body A1 with the naked eye with the transmitted light. It is a figure which shows the case where it observes from the specific angle with respect to image forming body A1 with the naked eye with the transmitted light. It is a figure which shows image forming body A2 and its one part enlarged view. It is a figure which shows the case where it observes from the orthogonal | vertical direction with respect to image forming body A2 with the naked eye with reflected light. It is a figure which shows the case where it observes from the specific angle with respect to image forming body A2 with naked eyes with reflected light. It is a figure which shows the case where it observes from the orthogonal | vertical direction with respect to image forming body A2 with the naked eye with the transmitted light. It is a figure which shows the case where it observes from the specific angle with respect to image forming body A2 with the naked eye with the transmitted light. It is a figure which shows an example of the uneven | corrugated shape which forms an embossed image or a printing image, and the positional relationship of a punch. FIG. 6 is a diagram illustrating an example of a perforation 9. FIG. 6 is a diagram illustrating an example of a perforation 9. 3 is a diagram illustrating an example of a perforation group 10. FIG.

Explanation of symbols

1 Base material 1a, 1b, 1c, 1d Surface base height 2, 2a, 2b, 2c, 2d Concavity 3, 3a, 3b, 3c, 3d Convex part 4a, 4b Embossed image 5 Predetermined area 7 Background area 8 Latent Image area 9, 9a, 9b Perforation 10 Perforation group 11a First inclined area 11b Second inclined area A1, A2 Image forming body

Claims (3)

An image forming body having a latent image region and a background region on a substrate,
In the latent image area and the background area, dot-shaped concave portions and dot-shaped convex portions are alternately formed in a matrix by embossing, and a predetermined pitch between the latent image region and the convex portions of the background region is set. At the same pitch and out of phase, the perforations formed so as to penetrate the base material, in the latent image region and the background region,
Having the predetermined pitch, and formed in a matrix with the same phase;
The perforations formed in the background region are formed in either the concave portion or the convex portion,
The image forming body, wherein the perforations formed in the latent image area are formed in the other area. 2. The image forming body according to claim 1, wherein cross-sectional shapes of the dot-shaped concave portions and the dot-shaped convex portions are formed in a triangular shape, a saddle shape, a trapezoidal shape, or a quadrangular shape. The pitch between the dot-shaped convex portions is in the range of 150 to 1500 μm, the pitch of the perforations is in the range of 150 to 1500 μm, and the diameter of the perforations is in the range of 50 to 500 μm. The image forming body according to claim 1 or 2.

Images