JP4840919B2 - Anti-counterfeit media - Google Patents

Description

  The present invention relates to an anti-counterfeit medium such as an anti-counterfeit sheet, and more particularly to an anti-counterfeit structure using a latent image.

  In the past, counterfeit crimes have frequently occurred in securities such as prepaid cards, various admission tickets, gift certificates and stock certificates because they are widely distributed and can be exchanged relatively easily. In particular, in recent years, with the improvement and popularization of copying machines such as color copiers, counterfeit products that cannot be easily distinguished from genuine products can be manufactured relatively easily, and countermeasures against counterfeiting are required. Yes. Moreover, measures against counterfeiting are required not only for the above-mentioned securities but also for banknotes.

  As one of countermeasures against such counterfeiting, a technique that enables authenticity determination of securities and banknotes using a latent image is considered, and is disclosed in, for example, Patent Document 1.

  The technique disclosed in Patent Document 1 includes a plurality of printed lines on a sheet base material, parallel to the printed lines, a part extending in a direction orthogonal to the printed lines, and a cross section The raised relief lines are provided to raise the latent image depending on the observation direction. When the substrate is viewed from the front, all the printed lines are visible. However, when the observation direction is changed to a direction perpendicular to the printed lines and the relief lines, the portion of the printed lines where the relief lines extend is visible behind the extended relief lines. While not possible, the other parts of the printed line remain visible. Thereby, a latent image corresponding to the shape of the relief line can be raised.

In this way, in the case of a sheet base material provided with a relief line with a raised cross section, the printed information including the printed line printed on the surface is copied, but the raised shape of the relief line is reproduced. Can not. For this reason, even when the observation direction of the copy is changed, the latent image does not appear, thereby making it possible to determine authenticity.
JP 2000-313161 A

  However, as described above, on the sheet base material, a plurality of printed lines, parallel to the printed lines, a part extends in a direction perpendicular to the printed lines, and the cross-section is raised. In the case where a relief line is provided and a latent image is raised by the printed line and the relief line, the latent image only appears when viewed from a direction perpendicular to the printed line and the relief line. It is hard to say that it is easy to determine authenticity by image. In particular, when the observation direction is limited, there is a possibility that the authenticity determination based on the latent image cannot be performed.

  The present invention has been made in view of the problems of the conventional techniques as described above, and provides a forgery prevention medium that can easily perform authenticity determination by a latent image without being limited to an observation direction. The purpose is to provide.

In order to achieve the above object, the present invention provides:
A background color region provided on the substrate surface;
A plurality of mark portions provided in a matrix having a color different from the background color region on the background color region;
A row and / or a column is formed in parallel with the arrangement direction of the plurality of mark portions in a predetermined region of the background color region, and from the surface of the base material so that the color of the background color region is exposed at the top. A first convex portion group consisting of a plurality of convex portions formed to protrude;
A row and / or a column are formed in parallel to the arrangement direction of the plurality of convex portions constituting the first convex portion group in a region other than the predetermined region in the background color region, and the top portion includes the mark portion. In this way, the second convex portion group is formed of a plurality of convex portions formed so as to protrude from the surface of the substrate.

  In the present invention configured as described above, when the substrate is observed from the front, a plurality of mark portions provided in a matrix shape with a color different from the background color region is recognized in the background color region of the substrate surface. The The base material has a plurality of protrusions protruding from the surface of the base material, but when the base material is observed from the front, the protrusions are observed from the protruding direction of the protrusions. It is only recognized as a matrix, and the latent image does not appear as it appears. When the observation direction is changed from this state to a direction that forms an acute angle with respect to the substrate surface, the side surfaces of the plurality of protrusions protruding from the substrate surface are projected by the protrusions adjacent to the observation direction side of the protrusions. Hidden and invisible, only the top is visible. At that time, among the plurality of convex portions, in the convex portions constituting the first convex portion group, the color of the background color region is exposed at the top, and the convex portions constituting the second convex portion group In FIG. 5, a mark portion having a color different from that of the background color region is exposed at the top. Therefore, the latent image by the 1st convex part group or the 2nd convex part group comes to emerge by the difference in these colors. Here, in the present invention, a plurality of mark portions are provided in a matrix shape in the background color region, and rows and / or columns are configured in parallel with the arrangement direction of the plurality of mark portions in the predetermined region of the background color region. The first convex portion group composed of the plurality of convex portions is formed, and in parallel with the arrangement direction of the plurality of convex portions constituting the first convex portion group in the region other than the predetermined region in the background color region Since the second convex part group consisting of a plurality of convex parts constituting rows and / or columns is formed, the surface of the base material can be observed from any direction that forms an acute angle with respect to the base material surface. The side surfaces of the plurality of convex portions protruding from the convex portion adjacent to the observation direction side of the convex portions are hidden and become invisible so that only the top portion is visible, and the color of the top portion of the first convex portion group And the first convex portion due to the difference in the color of the top of the second convex group Or it becomes visible emerged latent image by the second protrusion group.

  As described above, in the present invention, a plurality of mark portions having colors different from the background color region are provided in a matrix shape in the background color region, and the arrangement direction of the plurality of mark portions in the predetermined region of the background color region The first convex portion group is formed of a plurality of convex portions constituting rows and / or columns in parallel with the first convex portion group, and the first convex portion group is configured in a region other than the predetermined region in the background color region. Which direction forms an acute angle with respect to the surface of the substrate because the second convex portion group is formed of a plurality of convex portions forming rows and / or columns in parallel with the arrangement direction of the plurality of convex portions. Even when observed from the side surface of the plurality of convex portions protruding from the substrate surface is hidden by the convex portions adjacent to the observation direction side of the convex portion, and only the top portion is visible And without being limited to the viewing direction The authenticity discrimination due to the latent image can be easily performed by the latent image formed by the first protrusion group or the second protrusion group emerged.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a diagram showing an anti-counterfeit sheet that is an embodiment of the anti-counterfeit medium of the present invention, (a) is a diagram showing the overall configuration, and (b) is an anti-counterfeit structure shown in (a). 10 is a diagram showing a detailed configuration of FIG. 10, (c) is a cross-sectional view taken along line AA ′ shown in (b), (d) is a cross-sectional view taken along line BB ′ shown in (b), and (e) is a latent image. The figure which shows the structure of the convex part 13 which comprises the 1st convex part group for expressing, (f) is a figure which shows the structure of the convex part 14 which comprises a 2nd convex part group.

  As shown in FIG. 1, the forgery prevention sheet 1 of the present embodiment is configured by providing a forgery prevention structure 10 in a partial region of a sheet base 2 made of paper. The sheet base material 2 has a flat surface portion 3 that becomes the surface of the base material, and an information printing region 4 is provided in a partial region of the flat surface portion 3 and a forgery prevention structure 10 is provided in another region. . The anti-counterfeit sheet 1 configured in this manner can be used as an entrance ticket for a concert, for example. In this case, the contents of the concert, the venue name, the seat number, etc. are printed in the information printing area 4. In addition, before the information is printed in the information printing area 4 of the sheet base material 2, it may be possible to print a tint block or precolor the sheet base material 2 as a pre-print. In this case, it is necessary not to make it difficult to see the latent image by the forgery prevention structure 10.

  As shown in FIG. 1B, the anti-counterfeit structure 10 provided on the sheet base 2 has a background on a background color region 12 made of the same white color as the base color of the flat portion 3 of the sheet base 2. A plurality of mark portions 11 made of black different from the color region 12 are provided in a matrix. In the region where the plurality of mark portions 11 are provided in a matrix, a plurality of convex portions 13 constituting the first convex portion group and a plurality of convex portions 14 constituting the second convex portion group are formed. ing. As shown in FIGS. 1 (c) to (f), these convex portions 13 and 14 have a shape in which the apex portion is removed from the cone, and are in the normal direction of the plane portion 3 from the surface of the sheet base material 2. It protrudes about 0.05-0.1 mm, and the boundary part with the plane part 3 becomes circular shape with a diameter of 0.5 mm or less. As the distance from the boundary portion increases, the cross-sectional area gradually decreases, and on the opposite side of the boundary portion are apexes 13b and 14b parallel to the plane portion 3. The plurality of convex portions 13 constituting the first convex portion group are parallel to the arrangement direction of the plurality of mark portions 11 so as to express the letter “T” that becomes a latent image by the shape of the first convex portion group. A row and a column are formed and formed in a predetermined region of the background color region 12, each of which is formed between a plurality of mark portions 11 provided in a matrix. As a result, as shown in FIG. 1 (e), a part of the four mark portions 11 is applied to the side surface 13a, and the white color of the background color region 12 surrounded by the four mark portions 11 is the top portion 13b. It is expressed in. In addition, the plurality of convex portions 14 constituting the second convex portion group are arranged so as to surround the region where the plurality of convex portions 13 constituting the first convex portion group are formed in the background color region 12. It is formed by forming rows and columns in parallel with the arrangement direction of the convex portions 13, and each of them is a mark provided in a region other than the predetermined region among the plurality of mark portions 11 provided in a matrix shape. It is formed on the part 11. Thereby, as shown in FIG. 1 (f), the top portion 14 b and the side surface 14 a include the mark portion 11. Note that the anti-counterfeit structure 10 illustrated in the present embodiment has 100 mark portions 11 formed in a 10 × 10 matrix for the sake of simplicity of explanation, but the number thereof should be increased. As a result, the character that becomes a latent image that can be lifted by the forgery prevention structure 10 can be made finer, and a curve or the like can be easily expressed.

  Below, the manufacturing method of the forgery prevention sheet 1 comprised as mentioned above is demonstrated.

  First, 100 mark portions 11 are printed in black in a 10 × 10 matrix shape in an area where the forgery prevention structure 10 of the sheet base material 2 is provided, that is, an area to be a white background color area 12. The mark portion 11 may be printed simultaneously with the pre-printing as described above or after the pre-printing described above.

  Next, the convex part 13 which comprises a 1st convex part group, and the convex part 14 which comprises a 2nd convex part group are formed in the area | region where the mark part 11 was printed using the embossing plate. The convex portion 13 is formed between a plurality of mark portions 11 provided in a matrix in a predetermined region that forms “T” that becomes a latent image, in the region where the mark portion 11 is printed. 14 is formed on the mark portion 11 provided in a region other than the predetermined region among the plurality of mark portions 11 provided in a matrix.

  As described above, the anti-counterfeit sheet 1 is manufactured, and then information corresponding to the application is printed on the information printing area 4 of the sheet base 2 and used.

  Below, the effect | action of the forgery prevention sheet 1 mentioned above is demonstrated.

  First, the operation when the anti-counterfeit sheet 1 shown in FIG. 1 is observed from the front, that is, from the normal direction of the flat portion 3 of the sheet base material 2 will be described.

  FIG. 2 is a view for explaining the operation when the anti-counterfeit sheet 1 shown in FIG. 1 is observed from the front, and shows how the anti-counterfeit structure 10 is seen.

  When the anti-counterfeit sheet 1 shown in FIG. 1 is observed from the front, that is, from the normal direction of the plane portion 3, the anti-counterfeit structure 10 has a white background color region 12 as shown in FIG. On the other hand, since the plurality of mark portions 11 provided in the background color region 12 in a matrix shape are black, the plurality of mark portions 11 in the matrix shape are recognized. At this time, a plurality of convex portions 13 and 14 projecting from the flat surface portion 3 are formed on the sheet base material 2. When the anti-counterfeit sheet 1 is observed from the front, the projecting portions 13 and 14 project. Since the mark portion 11 is observed from the direction, all the mark portions 11 provided in a matrix shape are visually recognized without any obstruction from the observation direction, and the convex portions 13 and 14 are not easily recognized, The latent image “T” emerges and does not appear.

  Next, an operation when the observation direction with respect to the anti-counterfeit sheet 1 shown in FIG. 1 is changed from the front direction, that is, the normal direction of the flat portion 3 of the sheet base material 2 will be described.

  FIG. 3 is a diagram for explaining the operation when the observation direction with respect to the anti-counterfeit sheet 1 shown in FIG. 1 is changed from the front, and (a) is a projection that constitutes the first projection group. The figure which looked at the part 13 from the side surface direction, (b) is the figure which looked at the convex part 14 which comprises a 2nd convex part group from the side direction, (c)-(f) shows how the anti-counterfeit structure 10 looks. FIG.

  When the observation direction with respect to the forgery prevention sheet 1 shown in FIG. 1 is changed from the front, the angle formed by the observation direction with respect to the flat portion 3 of the sheet base 2 becomes an acute angle. Then, as shown in FIGS. 3A and 3B, the side surfaces 13 a and 14 a of the plurality of protrusions 13 and 14 protruding from the plane portion 3 are adjacent to the observation direction side of the protrusions 13 and 14. The portions 13 and 14 are hidden and cannot be seen, and only the top portions 13b and 14b are visible.

  Here, among the plurality of convex portions 13 and 14, the convex portion 13 constituting the first convex portion group expressing the latent image has a white background color region 12 as shown in FIG. Is expressed at the top portion 13b, and the black mark portion 11 different from the background color region 12 is formed in the convex portion 14 constituting the second convex portion group as shown in FIG. Is exposed at the top 14b.

  Therefore, the observation direction with respect to the anti-counterfeit sheet 1 is changed to, for example, the lower side in FIG. 1, and the side surfaces 13 a and 14 a of the plurality of convex portions 13 and 14 are adjacent to the observation direction side of the convex portions 13 and 14. When the convex portions 13 and 14 are hidden and become invisible, and only the top portions 13b and 14b are visible, depending on the color of the top portion 13b of the convex portion 13 and the top portion 14b of the convex portion 14, FIG. As shown in c), the latent image “T” formed by the shape of the first convex portion group including the plurality of convex portions 13 appears to appear to be white.

  Here, in the anti-counterfeit sheet 1 shown in FIG. 1, a plurality of mark portions 11 are provided in a matrix shape in the background color region 12, and the arrangement direction of the plurality of mark portions 11 in the predetermined region of the background color region 12 A first convex portion group including a plurality of convex portions 13 that form a latent image “T” is formed by forming rows and columns in parallel with each other, and a region surrounding the predetermined region in the background color region 12 is formed. The second convex group consisting of a plurality of convex parts 14 surrounding the latent image “T” by forming rows and columns in parallel with the arrangement direction of the plurality of convex parts 13 constituting the first convex part group. Is formed. Therefore, the plurality of convex portions 13 constituting the first convex portion group and the plurality of convex portions 14 constituting the second convex portion group are in a substantially matrix shape including rows and columns. Even when viewed from any direction forming an acute angle, the side surfaces 13a, 14a of the plurality of convex portions 13, 14 are hidden by the convex portions 13, 14 adjacent to the observation direction side of the convex portions 13, 14. In this state, only the top portions 13b and 14b can be seen, and the colors of the top portions 13b of the plurality of convex portions 13 constituting the first convex portion group and the plurality of convex portions constituting the second convex portion group. Due to the difference from the color of the top portion 14 b of the portion 14, the latent image “T” by the first convex portion group appears to appear to be white. For example, when the observation direction with respect to the anti-counterfeit sheet 1 is changed to the upper side in FIG. 1, the latent image “T” formed by the shape of the first convex portion group including the plurality of convex portions 13 is shown in FIG. ), And when the observation direction with respect to the anti-counterfeit sheet 1 is changed to the right side in FIG. 1, depending on the shape of the first convex group consisting of a plurality of convex parts 13. When the constructed latent image “T” appears to emerge as shown in FIG. 3E, and the observation direction with respect to the anti-counterfeit sheet 1 is changed to the left side in FIG. The latent image “T” formed by the shape of the first convex group consisting of the portions 13 appears to appear as shown in FIG.

  Note that, when observed from any direction described above, the side surface 14a of the plurality of convex portions 14 constituting the second convex portion group can be visually recognized in the convex portion 14 constituting the row in the foremost direction in the observation direction. However, the number of the convex portions 13 and 14 is large, or the line width of the latent image formed by the convex portions 13 is exposed on the side surface 14a of the convex portion 14 that constitutes the row closest to the observation direction. It is only necessary to recognize that the mark portion 11 is unrelated to the latent image by being thicker than the line width of the mark portion 11 or the like. If the latent image is obscured by the mark portion 11 that is exposed on the side surface 14a of the convex portion 14 that forms the foremost row in the observation direction, the convex portions 13 that constitute the latent image are arranged in a matrix. What is necessary is just to provide between the mark parts 11 away from the circumference | surroundings among the several mark parts 11 formed.

  When the anti-counterfeit sheet 1 described above is copied, the information printed in the information printing area 4 of the sheet base material 2 and the mark portions 11 provided in a matrix by printing on the sheet base material 2 are copied. The convex portions 13 and 14 cannot be reproduced. For this reason, even if the observation direction of the copy is changed, the latent image formed by the first convex portion group composed of the plurality of convex portions 13 does not appear, thereby enabling authenticity determination. Become. Thus, when performing authenticity determination, in the anti-counterfeit sheet 1 of the present embodiment, when the observation direction with respect to the anti-counterfeit sheet 1 is changed from the normal direction of the flat portion 3 of the sheet base material 2 to which direction Even so, since the latent image formed by the first convex portion group including the plurality of convex portions 13 appears to appear, it is possible to easily determine the authenticity of the latent image without being limited to the observation direction.

(Other embodiments)
4A and 4B are diagrams showing an anti-counterfeit sheet according to another embodiment of the anti-counterfeit medium of the present invention. FIG. 4A is a diagram showing the entire configuration, and FIG. 4B is an anti-counterfeit shown in FIG. The figure which shows the detailed structure of the structure 110, (c) is AA 'sectional drawing shown in (b), (d) is BB' sectional drawing shown in (b), (e) is a latent image. FIG. 8 is a diagram illustrating a configuration of a convex portion 113 that constitutes a first convex portion group for representing the above, and FIG. 6F is a diagram illustrating a configuration of a convex portion 114 that constitutes a second convex portion group.

  In this embodiment, as shown in FIG. 4, a background color region 112 is provided in black in the region that becomes the forgery prevention structure 110 of the sheet base material 102, and the background color region 112 is white as shown in FIG. 1. The only difference is that the mark portions 111 are provided in a matrix. That is, the color of the background color area 112 and the color of the mark portion 111 are reversed with respect to those shown in FIG.

  In the anti-counterfeit sheet 101 configured as described above, when viewed from the front, the latent image “T” is obtained simply by recognizing the mark portions 111 provided in a matrix in the black background color region 112 in white. Is not recognized. And if the observation direction with respect to the forgery prevention sheet 101 is changed from the front, the side surfaces 113a and 114a of the plurality of convex portions 113 and 114 protruding from the flat surface portion 103 are adjacent to the observation direction side of the convex portions 113 and 114. The convex portions 113 and 114 are hidden and cannot be seen, and only the top portions 113b and 114b are visible. Depending on the color of the top portion 113b of the convex portion 113 and the top portion 114b of the convex portion 114, a plurality of convex portions are formed. The latent image “T” formed by the shape of the first convex portion group consisting of 113 appears to appear in black.

  5A and 5B are diagrams showing an anti-counterfeit sheet as another embodiment of the anti-counterfeit medium of the present invention, wherein FIG. 5A is a diagram showing the entire configuration, and FIG. 5B is an anti-counterfeit shown in FIG. The figure which shows the detailed structure of the structure 210, (c) is AA 'sectional drawing shown in (b), (d) is BB' sectional drawing shown in (b), (e) is a latent image. FIG. 8 is a diagram illustrating a configuration of a convex portion 213 that constitutes a first convex portion group for expressing, and (f) is a diagram illustrating a configuration of a convex portion 214 that constitutes a second convex portion group.

  As shown in FIG. 5, this embodiment is different from that shown in FIG. 1 only in that the size of the mark portions 211 provided in a matrix on the sheet base material 202 is smaller than the top portion 214 b of the convex portion 214. Are different.

  In the anti-counterfeit sheet 201 configured as described above, when viewed from the front, the latent image “T” is obtained simply by recognizing the mark portions 211 provided in a matrix in the white background color region 212 in black. Is not recognized. When the observation direction with respect to the anti-counterfeit sheet 201 is changed from the front, the side surfaces 213a and 214a of the plurality of convex portions 213 and 214 protruding from the plane portion 203 are adjacent to the observation direction side of the convex portions 213 and 214. The convex portions 213 and 214 are hidden and cannot be seen, and only the top portions 213b and 214b can be seen. The latent image “T” formed by the shape of the first convex group of 213 appears to appear as white.

  6A and 6B are diagrams showing an anti-counterfeit sheet according to another embodiment of the anti-counterfeit medium of the present invention, wherein FIG. 6A is a diagram showing the entire configuration, and FIG. 6B is an anti-counterfeit shown in FIG. The figure which shows the detailed structure of the structure 310, (c) is AA 'sectional drawing shown in (b), (d) is BB' sectional drawing shown in (b), (e) is a latent image. FIG. 6 is a diagram illustrating a configuration of a convex portion 313 that constitutes a first convex portion group for expressing the above, and (f) is a diagram illustrating a configuration of a convex portion 314 that constitutes a second convex portion group.

  In this embodiment, as shown in FIG. 6, a black background color region 312 is provided in the region of the sheet base material 302 which becomes the forgery prevention structure 310, and the background color region 312 is white. The only difference is that the mark portions 311 are provided in a matrix. That is, the color of the background color region 312 and the color of the mark portion 311 are inverted with respect to those shown in FIG.

  In the anti-counterfeit sheet 301 configured as described above, when viewed from the front, the latent image “T” is obtained simply by recognizing the mark portions 311 provided in a matrix in the black background color region 312 in white. Is not recognized. And if the observation direction with respect to the forgery prevention sheet 301 is changed from the front, the side surfaces 313a and 314a of the plurality of convex portions 313 and 314 protruding from the flat surface portion 303 are adjacent to the observation direction side of the convex portions 313 and 314. The convex portions 313 and 314 are hidden and cannot be seen, and only the top portions 313b and 314b can be seen. The latent image “T” formed by the shape of the first convex portion group 313 is made to appear as if it is black.

  It should be noted that the height of the convex portions 13, 14, 113, 114, 213, 214, 313, and 314 from the flat portions 3, 103, 203, and 303 and the flat portions 3, 103, 203, and 303 in the above-described embodiment. The dimensions of the boundary portion are not limited to those described above, and can be set as appropriate.

  Further, in the convex portions 13, 14, 113, 114, 213, 214, 313, 314, a cylindrical shape or a conical shape without the top portions 13b, 14b, 113b, 114b, 213b, 214b, 313b, 314b, It is also possible to use a dome shape. However, as described above, the shape having the top portions 13b, 14b, 113b, 114b, 213b, 214b, 313b, and 314b parallel to the plane portions 3, 103, 203, and 303 has the background color regions 12, 112, and 212. , 312 are connected to each other, and the latent image can be clearly highlighted. It is also conceivable that the cross section is rectangular. However, in the ones shown in FIGS. 1 and 4, among the convex portions 13, 14, 113, and 114, at least the convex portions 13 and 113 constituting the first convex portion group that expresses the latent image are planar portions. When the distance from the center is substantially constant such that the boundary portion with 3, 103 is a circular shape, the shapes of the top portions 13b and 113b that can be viewed from any direction are the same, and the convex shape The fine shape of the latent image that appears by the portions 13 and 113 can be made uniform. Further, at the formation angles with respect to the flat portions 3, 103, 203, 303, the side surfaces 13a, 14a, 113a, 114a, 213a, 214a, 313a, and the like of the convex portions 13, 14, 113, 114, 213, 214, 313, 314, In order to make 314a easily hidden by the convex portions 13, 14, 113, 114, 213, 214, 313, and 314 adjacent to the observation direction side, it protrudes parallel to the normal direction of the plane portions 3, 103, 203, and 303. It is preferable that each of the convex portions 13, 14, 113, 114, 213, 214, 313, and 314 is formed in a columnar shape such as a cylinder.

  In addition, the information that becomes a latent image is not limited to a plurality of convex portions 13, 113, 213, and 313 that form rows and columns as in the above-described “T”, and a plurality of convex portions 13, 113, 213, and the like. 313 may be configured only in rows or only in columns. Moreover, it is not limited to one consisting of a single character, but may be one consisting of a plurality of characters or a pattern. Further, the plurality of convex portions 13, 113, 213, and 313 constituting the first convex portion group that expresses the latent image is divided into a plurality of regions, and characters and the like emerge in each of the plurality of regions. Is also possible. In addition, the plurality of protrusions 14, 114, 214, and 314 that form the second protrusion group include the plurality of protrusions 13 that form the first protrusion group in the background color regions 12, 112, 212, and 312. , 113, 213, 313 are not completely surrounded, but are partially opened so that the plurality of convex portions 14, 114, 214, 314 constituting the second convex portion group The shape surrounding the region where the plurality of convex portions 13, 113, 213, and 313 constituting the first convex portion group are formed may be employed.

  In the above-described embodiment, the latent image “T” is expressed by the shape of the first convex group consisting of the plurality of convex portions 13, 113, 213, and 313. The latent image “T” may be expressed by the shape of the second convex group consisting of 114, 214, and 314. In that case, when the observation direction with respect to the anti-counterfeit sheet 1, 101, 201, 301 is changed from the front, it appears on the top portions 14b, 114b, 214b, 314b of the plurality of convex portions 14, 114, 214, 314. The latent image “T” appears to appear in the color that is present, that is, the color of the mark portions 11, 111, 211, and 311.

  In the above-described embodiment, the anti-counterfeit sheet 1, 101, 101 in which the anti-counterfeit structure 10, 110, 210, 310 is provided on the sheet base material 2, 102, 202, 302 made of paper is used as the anti-counterfeit medium. The present invention is not limited to such an anti-counterfeit sheet 1, 101, 201, 301, but the present invention is not limited to such an anti-counterfeit sheet 1, 101, 201, 301, but a card substrate formed by laminating a sheet substrate made of a film and a plurality of resin layers. The present invention can also be applied to a material provided with the anti-counterfeit structure 10, 110, 210, 310 as described above.

It is a figure which shows the forgery prevention sheet | seat used as one Embodiment of the forgery prevention medium of this invention, (a) is a figure which shows the whole structure, (b) is a detailed structure of the forgery prevention structure shown to (a). (C) is a cross-sectional view taken along the line AA ′ shown in (b), (d) is a cross-sectional view taken along the line BB ′ shown in (b), and (e) is a first view for expressing a latent image. The figure which shows the structure of the convex part which comprises 1 convex part group, (f) is a figure which shows the structure of the convex part which comprises a 2nd convex part group. It is a figure for demonstrating an effect | action at the time of observing the forgery prevention sheet | seat shown in FIG. 1 from the front. It is a figure for demonstrating an effect | action at the time of changing the observation direction with respect to the forgery prevention sheet | seat shown in FIG. 1 from the front, (a) is a side view about the convex part which comprises the 1st convex part group. FIG. 5B is a view of the convex portions constituting the second convex portion group as viewed from the side direction, and FIGS. 10C to 10F are views illustrating how the anti-counterfeit structure is seen. It is a figure which shows the forgery prevention sheet | seat which becomes other embodiment of the forgery prevention medium of this invention, (a) is a figure which shows the whole structure, (b) is detailed of the forgery prevention structure shown to (a). The figure which shows a structure, (c) is AA 'sectional drawing shown in (b), (d) is BB' sectional drawing shown in (b), (e) is for expressing a latent image The figure which shows the structure of the convex part which comprises a 1st convex part group, (f) is a figure which shows the structure of the convex part which comprises a 2nd convex part group. It is a figure which shows the forgery prevention sheet | seat which becomes other embodiment of the forgery prevention medium of this invention, (a) is a figure which shows the whole structure, (b) is detailed of the forgery prevention structure shown to (a). The figure which shows a structure, (c) is AA 'sectional drawing shown in (b), (d) is BB' sectional drawing shown in (b), (e) is for expressing a latent image The figure which shows the structure of the convex part which comprises a 1st convex part group, (f) is a figure which shows the structure of the convex part which comprises a 2nd convex part group. It is a figure which shows the forgery prevention sheet | seat which becomes other embodiment of the forgery prevention medium of this invention, (a) is a figure which shows the whole structure, (b) is detailed of the forgery prevention structure shown to (a). The figure which shows a structure, (c) is AA 'sectional drawing shown in (b), (d) is BB' sectional drawing shown in (b), (e) is for expressing a latent image The figure which shows the structure of the convex part which comprises a 1st convex part group, (f) is a figure which shows the structure of the convex part which comprises a 2nd convex part group.

Explanation of symbols

1, 101, 201, 301 Anti-counterfeit sheet 2, 102, 202, 302 Sheet base material 3, 103, 203, 303 Plane portion 4, 104, 204, 304 Information printing area 10, 110, 210, 310 Anti-counterfeit structure 11 , 111, 211, 311 Mark portion 12, 112, 212, 312 Background color region 13, 14, 113, 114, 213, 214, 313, 314 Convex portion 13a, 14a, 113a, 114a, 213a, 214a, 313a, 314a Side surface 13b, 14b, 113b, 114b, 213b, 214b, 313b, 314b Top

Claims (1)

A background color region provided on the substrate surface;
A plurality of mark portions provided in a matrix having a color different from the background color region on the background color region;
A row and / or a column is formed in parallel with the arrangement direction of the plurality of mark portions in a predetermined region of the background color region, and from the surface of the base material so that the color of the background color region is exposed at the top. A first convex portion group consisting of a plurality of convex portions formed to protrude;
A row and / or a column are formed in parallel to the arrangement direction of the plurality of convex portions constituting the first convex portion group in a region other than the predetermined region in the background color region, and the top portion includes the mark portion. As described above, a forgery prevention medium having a second convex portion group including a plurality of convex portions formed to protrude from the surface of the base material.

Images