JP4832333B2 - 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, from at least a part of a printed material, a first pattern composed of a line-shaped pattern printed with colored ink, and a line-shaped uneven pixel parallel to the first pattern. The second pattern is formed, and the latent image of the second pattern is raised depending on the observation direction. When the printed material is viewed from the front, all the first patterns are visible. However, when the observation direction is changed in a direction orthogonal to the first and second patterns, a part of the first pattern becomes behind the second pattern and cannot be visually recognized. Thereby, a latent image corresponding to the second pattern can be raised.

As described above, in the printed matter provided with the second pattern composed of the line-shaped concavo-convex pixels parallel to the first pattern in addition to the first pattern composed of the line-shaped pattern printed with the colored ink. In the case of copying, the print information including the first pattern is copied, but the concave / convex shape of the second pattern composed of the concave / convex pixels cannot be reproduced. 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 2006-111019 A

  However, as described above, in addition to the first pattern consisting of a line pattern printed with colored ink, a second pattern consisting of a line-like uneven pixel parallel to the first pattern is provided, When the observation direction is changed in a direction orthogonal to the first and second patterns, the latent image corresponding to the second pattern emerges. There is a problem that it is difficult to understand in which region the is present.

  The present invention has been made in view of the problems of the conventional techniques as described above, and provides a forgery prevention medium capable of easily recognizing a region where a latent image exists when performing authenticity determination. The purpose is to provide.

In order to achieve the above object, the present invention provides:
Printed lines formed on the substrate surface;
In a predetermined region of the substrate surface, a continuous convex shape extending in parallel with the printed lines is provided, and the printed lines are formed so as to include the printed lines on one side surface of the convex shape. 1 convex pattern;
In a region other than the predetermined region on the surface of the base material, the substrate has a continuous convex shape extending in parallel with the printing lines, and the printing surface of the first convex pattern among the side surfaces of the convex shape. A second convex pattern formed to include the printed lines on the side surface opposite to the side including the line;
The first and second convex patterns have a slope that is gentler than the slope of the convex shape, and are formed continuously between the first convex pattern and the second convex pattern. And a third convex pattern.

  In this invention comprised as mentioned above, when the base material is observed from the front, the printing line formed on the base material surface is recognized. A continuous first, second, and third convex pattern is formed on the base material. When the base material is observed from the front, the first, second, and third convex patterns are formed. Since the projection is observed from the top side to the bottom side, only the printed lines are recognized, and the latent image does not appear to appear. When the observation direction is changed from this state to a direction that forms an acute angle with respect to the substrate surface in the direction orthogonal to the printing lines, the first, second, and third convex patterns are recognized. However, since the slope of the convex shape of the third convex pattern is gentler than the slope of the convex shape of the first and second convex patterns, first, the side surface of the third convex pattern is Opposite the viewing direction, the third convex pattern is recognized by the reflection of light on its side. Since the third convex pattern is formed continuously between the first convex pattern and the second convex pattern, the first convex pattern or the second convex pattern is formed. The area where the latent image is present is recognized. Thereafter, when the observation direction is further changed to a direction that forms an acute angle with respect to the substrate surface, the first direction is obtained when the observation direction is changed to the side surface including the printed lines of the first convex pattern. In the region where the convex pattern is formed, the printed line is visually recognized, and in the region where the second convex pattern is formed, the printed line is hidden behind the second convex pattern and is not observed. When the direction is changed to the side surface including the printed line of the second convex pattern, the printed line is visually recognized in the region where the second convex pattern is formed, and the first convex pattern In the region where is formed, the printed lines are hidden behind the second convex pattern and become invisible, so that the latent image due to the first convex pattern or the second convex pattern emerges and appears. become.

  As described above, in the present invention, the convexities of the first and second convex patterns are provided between the first convex pattern and the second convex pattern constituting the latent image using the printed lines. Because it has a gentler slope than the slope in the shape, and has a third convex pattern formed continuously between the first convex pattern and the second convex pattern, When the observation direction is changed to a direction that forms an acute angle with respect to the substrate surface in the direction orthogonal to the printing lines, first, the third convex pattern is recognized, and this third convex shape is recognized. By the pattern, it is possible to recognize a region where a latent image due to the first convex pattern or the second convex pattern exists.

  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 an AA ′ sectional view shown in (b), (d) is a BB ′ sectional view shown in (b), and (e) is (b). It is a figure which shows in detail the boundary part of the character part 12 shown in FIG.

  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.

  The counterfeit prevention structure 10 provided on the sheet base material 2 is formed with a plurality of printed lines 11 parallel to each other, and a first convex pattern extending in parallel with the printed lines 11 12a and a second convex pattern 13a are formed. The convex pattern 12 a has a continuous convex shape extending in parallel with the printing lines 11 in the character portion 12 which is a predetermined region in which the latent image “T” emerges in the forgery prevention structure 10. The printed lines 11 are formed on the lower side surface in FIG. Further, the convex pattern 13a has a continuous convex shape extending in parallel with the printed lines 11 in the background portion 13 other than the character portion 12 in the forgery prevention structure 10, and the convex shape on the upper side in the figure. It is formed so as to include the printed lines 11 on the side surface. That is, the two convex patterns 12a and 13a are formed so as to be shifted from each other by ½ pitch in the arrangement direction.

  Furthermore, a continuous third convex pattern 14 a is formed between the character portion 12 and the background portion 13 along the character portion 12 and the background portion 13. The contour portion 14 indicates the contour of the portion 12. Although the convex pattern 14a has the same height as the convex patterns 12a and 13a, the bottom width is wider than that of the convex patterns 12a and 13a. Therefore, the inclination of the convex shape is the convex patterns 12a and 13a. It has become more gradual. Then, depending on the width of the convex pattern 14a, the two convex patterns 12a and 13a are shifted by ½ pitch in the arrangement direction, and among these side surfaces, the side surfaces including the printing lines 11 are different from each other. Yes. The width of the bottom of the convex pattern 14a is such that the slope of the convex pattern 14a is gentler than that of the convex patterns 12a and 13a, and the two convex patterns 12a and 13a are only ½ pitch in the arrangement direction. Any deviation can be set. Further, in the region extending in the direction orthogonal to the printing line 11, as shown in FIGS. 1D and 1E, the convex patterns 12a and 13a come into contact with the convex patterns 12a and 13a, respectively. The pattern 14a is integrated.

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

  First, a plurality of printed lines 11 are formed in a region where the forgery prevention structure 10 of the sheet base material 2 is provided. The formation of the printing lines 11 may be performed simultaneously with the pre-printing as described above or after the pre-printing described above.

  Next, by pressing the embossed plate from the flat portion 3 side of the sheet base material 2 to the area where the printing lines 11 are formed, the protruding patterns 12a and 13a extending in parallel with the printing lines 11 and the protruding shapes A convex pattern 14a extending between the patterns 12a and 13a is formed. With this embossed plate, the convex pattern 12 a is formed so as to include the printed line 11 on the lower side surface in FIG. 1 in parallel to the printed line 11, and the convex pattern 13 a is parallel to the printed line 11. 1 is formed so as to include the printed lines 11 on the upper side surface in FIG. 1, and the convex pattern 14a is formed between the convex patterns 12a and 13a.

  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 printed lines 11 are recognized in the anti-counterfeit structure 10 as shown in FIG. 2. At this time, the convex pattern 12a, 13a for expressing the latent image “T” and the convex pattern 14a of the outline are formed on the sheet base material 2, but the sheet base material 2 was observed from the front. In this case, since the observation is performed from the top side to the bottom side in the convex shape of the convex patterns 12a, 13a, and 14a, only the printed line 11 is recognized, and the latent image “T” appears. I ca n’t see it going up.

  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.

  First, the operation when the observation direction for the anti-counterfeit sheet 1 shown in FIG. 1 is changed from the front to the lower side in FIG. 1 will be described.

  FIG. 3 is a diagram for explaining the action that occurs when the observation direction for the anti-counterfeit sheet 1 shown in FIG. 1 is changed from the front to the lower side in FIG. 1, and (a) is a convex pattern. FIGS. 4A and 4B are diagrams showing the effect of light reflection in FIGS. 2A and 2B, and FIGS.

  When the observation direction with respect to the anti-counterfeit sheet 1 shown in FIG. 1 is changed from the front to the lower side in FIG. 1, the angle formed by the observation direction with respect to the flat portion 3 of the sheet base material 2 becomes an acute angle. However, it becomes the direction which opposes the side surface of convex pattern 12a, 13a, 14a. Then, as described above, since the slope of the convex shape of the convex pattern 14a is gentler than the slope of the convex shape of the convex patterns 12a and 13a, first, as shown in FIG. The side surfaces of the pattern 14a are opposed to the observation direction. Therefore, the light from the observation direction is reflected in the observation direction by the side surface of the convex pattern 14a, and as a result, only the convex pattern 14a emerges and appears as shown in FIG. Since the convex pattern 14a is formed between the character portion 12 and the background portion 13 where the latent image “T” emerges, the region where the latent image “T” exists is recognized. At this time, in the convex pattern 14a, as shown in FIGS. 3A and 3B, a portion extending in a direction orthogonal to the observation direction is easily recognized by reflection of light on the side surface. Also in the parallel part, since the convex pattern 14a is continuous, it can be easily distinguished from other regions, and thereby the entire contour of the latent image [T] can be visually seen.

  Thereafter, when the observation direction is changed to the lower side in FIG. 1 in a direction that forms an acute angle with respect to the sheet base material 2, the convex patterns 12 a and 13 a are in a state where only the lower side surface in FIG. 1 is visible. The side faces the observation direction. As described above, since the convex pattern 12a includes the printed lines 11 on the lower side surface in FIG. 1 among the side surfaces, in the character portion 12 on which the convex pattern 12a is formed, the printed lines are formed. 11, and the convex pattern 13a includes the printed lines 11 on the upper side surface in FIG. 1 among the side surfaces as described above, and thus the background on which the convex pattern 13a is formed. In the portion 13, the printed lines 11 are hidden by the convex pattern 13 a and cannot be seen. As a result, as shown in FIG. 3C, the latent image “T” by the printed lines 11 appears in the character portion 12. It becomes visible.

  Next, an operation when the observation direction for the forgery prevention sheet 1 shown in FIG. 1 is changed from the front to the upper side in FIG. 1 will be described.

  FIG. 4 is a diagram for explaining the action that occurs when the observation direction with respect to the forgery prevention sheet 1 shown in FIG. 1 is changed from the front to the upper side in FIG. 1, and FIG. The figure which shows the effect | action by reflection of light, (b), (c) is a figure which shows the appearance of the forgery prevention structure 10. FIG.

  When the observation direction with respect to the anti-counterfeit sheet 1 shown in FIG. 1 is changed from the front to the upper side in FIG. 1, the angle formed by the observation direction with respect to the flat portion 3 of the sheet substrate 2 becomes an acute angle, and the observation direction is changed. Then, the direction is opposite to the side surfaces of the convex patterns 12a, 13a, and 14a. Then, as described above, since the slope of the convex shape of the convex pattern 14a is gentler than the slope of the convex shape of the convex patterns 12a and 13a, first, as shown in FIG. The side surfaces of the pattern 14a are opposed to the observation direction. Therefore, the light from the observation direction is reflected in the observation direction by the side surface of the convex pattern 14a, and as a result, only the convex pattern 14a emerges and appears as shown in FIG. 4B. Since the convex pattern 14a is formed between the character portion 12 and the background portion 13 where the latent image “T” emerges, the region where the latent image “T” exists is recognized. At this time, in the convex pattern 14a, as shown in FIGS. 4A and 4B, a portion extending in the direction orthogonal to the observation direction is easily recognized by the reflection of light on the side surface. Also in the parallel part, since the convex pattern 14a is continuous, it can be easily distinguished from other regions, and thereby the entire contour of the latent image [T] can be visually seen.

  Thereafter, when the observation direction is changed to the upper side in FIG. 1 in a direction that forms an acute angle with respect to the sheet base material 2, the side surfaces of the convex patterns 12 a and 13 a can be seen in a state where only the upper side surface in FIG. Will face the viewing direction. As described above, since the convex pattern 12a includes the printed lines 11 on the lower side surface in FIG. 1 among the side surfaces, in the character portion 12 on which the convex pattern 12a is formed, the printed lines are formed. 11 is hidden by the convex pattern 12a, and the convex pattern 13a includes the printed line 11 on the upper side surface in FIG. 1 among the side surfaces as described above. In the background portion 13 on which the printed line 11 is formed, the printed line 11 can be seen. As a result, as shown in FIG. 4C, the latent image “T” is formed by the printed line 11 that appears in the background part 13. It comes to emerge.

  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 printed lines 11 formed on the sheet base material 2 are copied, but the convex pattern 12a. , 13a and 14a cannot be reproduced. For this reason, even when the observation direction of the copy is changed, the contour of the latent image using the convex patterns 12a and 13a or the latent image of the convex pattern 14a does not appear, thereby determining authenticity. Can be performed. Further, since the convex patterns 12a, 13a, and 14a are formed by recessing the flat surface portion 3 of the sheet base material 2, the convex shape 12a, 13a, and 14a is convex when the sheet base material 2 is viewed from the front and back sides or directly touched. The pattern 12a, 13a, 14a is not easily recognized, and the convex pattern 12a, 13a, 14a is difficult to be reproduced, and the forgery prevention function can be improved.

  In this embodiment, the anti-counterfeit sheet 1 in which the anti-counterfeit structure 10 is provided on the sheet base material 2 made of paper has been described as an example of the anti-counterfeit medium. The present invention is not limited to 1, but can be applied to a sheet base material made of a film or a card base material in which a plurality of resin layers are laminated and provided with the forgery prevention structure 10 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 an AA ′ sectional view shown in (b), (d) is a BB ′ sectional view shown in (b), and (e) is a character part shown in (b). It is a figure which shows the boundary part of an image and a background part in detail. 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 the effect | action which arises when the observation direction with respect to the forgery prevention sheet | seat shown in FIG. 1 is changed from the front to the lower side in FIG. 1, (a) is by reflection of the light in a convex pattern. The figure which shows an effect | action, (b), (c) is a figure which shows the appearance of a forgery prevention structure. It is a figure for demonstrating the effect | action produced when the observation direction with respect to the forgery prevention sheet | seat shown in FIG. 1 is changed from the front to the upper side in FIG. 1, (a) is the effect | action by reflection of the light in a convex pattern. (B), (c) is a figure which shows the appearance of a forgery prevention structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Anti-counterfeit sheet 2 Sheet base material 3 Plane part 4 Information printing area 10 Anti-counterfeit structure 11 Print line 12 Character part 12a, 13a, 14a Convex pattern 13 Background part 14 Outline part

Claims (1)

Printed lines formed on the substrate surface;
In a predetermined region of the substrate surface, a continuous convex shape extending in parallel with the printed lines is provided, and the printed lines are formed so as to include the printed lines on one side surface of the convex shape. 1 convex pattern;
In a region other than the predetermined region on the surface of the base material, the substrate has a continuous convex shape extending in parallel with the printing lines, and the printing surface of the first convex pattern among the side surfaces of the convex shape. A second convex pattern formed to include the printed lines on the side surface opposite to the side including the line;
The first and second convex patterns have a slope that is gentler than the slope of the convex shape, and are formed continuously between the first convex pattern and the second convex pattern. And a third anti-counterfeit medium.

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