JP2010089282A - Forgery-proof printed matter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide printed matter which enables easy determining of forgery by making a three-dimensional structure in a part of a pattern which creates a moire consisting of a curved image defining line. <P>SOLUTION: Forgery-proof printed matter comprises a group of image defining lines such as a first image defining line, a second image defining line, a third image defining line to an n-1th image defining line and an n-th image defining line. These image defining lines each have a specified image defining line width to be printed on the base. The first image defining line is formed of a straight line, and the n-th image defining line is formed of a specified curve. Further, the second image defining line, the third image defining line to the n-1th image defining line which are formed between the first image defining line and the n-th image defining line, are formed in such a shape that these image defining lines gradually get closer to the shape of a specified curve of the n-th image defining line from the straight line shape of the first image defining line. Thus, the image defining line of the image defining line group, is constituted of a low image defining line part and a high image defining line part, which differ in the height of protuberance from the base. In addition, the image defining line of the image defining line group forms an invisible image to the region composed of the low image defining line part on account of a height level difference from the region consisting of the high image defining line part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an anti-counterfeit printed matter that requires prevention of counterfeiting or copying of banknotes, stock certificates, securities such as bonds, various certificates and important documents.

  With the recent widespread use of copiers, measures to prevent counterfeiting and alteration by copiers are important factors for valuable securities such as banknotes, stock certificates, bonds and other securities, various certificates and important documents. One of the effective anti-counterfeiting measures for determining whether or not a copy made by such a copying machine is genuine is a moire pattern. The pattern by moire interferes with the pattern on the printed matter in which straight lines and curves having a constant line width are continuously arranged at regular intervals, and the scanning input / output scanning lines of the copier during copying cause interference fringes. It is what happens.

  However, with the recent widespread use of color copiers, there is a risk that crimes due to counterfeiting and alteration will increase, and the development of technology as a more effective forgery and alteration prevention measure has been desired.

  As an image line configuration for generating a pattern due to moire as the anti-counterfeit measure, there is a line pattern first. For example, according to Japanese Utility Model Publication No. 2-43747, in order to prevent copying forgery by an electrophotographic color copying machine copy machine, a printed layer with a single line pattern is formed on a sheet base material in one color, A lens used in a color copy machine by forming a print layer with a line pattern or a halftone dot pattern on the print layer by changing the angle of the pattern with another color and copying it with a color copy machine. Because the lens aberration causes distortion in the peripheral part and the pattern is composed of different colors, the chromatic aberration causes a shift between the colors, resulting in a moiré that is different from the moiré of the actual printed matter. A copy-forgery-preventing printed matter that can be checked for copy-counterfeiting with a color copying machine only by visual observation is disclosed (for example, see Patent Document 1).

  Further, according to Japanese Utility Model Laid-Open No. 1-38666, a plurality of radial lines radiating from a reference point on the object line formation are provided so that the distance between adjacent radial lines is substantially constant. There has been disclosed an image forming body that can identify a copy by reliably generating moire in a portion parallel to the scanning direction of the CCD sensor when the image forming object is copied (see, for example, Patent Document 2). .)

  However, since both devices of Patent Documents 1 and 2 use a line pattern, it is necessary to depend on the angle of the line constituting the line, and therefore the line with the angle of the line pattern changed. It is necessary to combine many.

  Therefore, there is a technique using a concentric circle pattern as a technique for generating moire without depending on the angle described above. For example, in Japanese Utility Model Laid-Open No. 5-12173, a large number of concentric circles spaced apart from each other or a background portion made of a large amount of radiation is printed and formed on a copy paper. These portions are halftone dots or lines having an inclination angle that generates moire with respect to the reading direction of the digital copier, and this portion appears on the copy paper as a moire generation portion that is not in the background portion of the copy paper. Therefore, when copying from any reading direction, the same copy as the copy paper is not performed, and the difference can be made to appear on the copy paper to clarify the difference from the copy paper. A copy paper for preventing counterfeiting is disclosed (for example, see Patent Document 3).

  Japanese Patent Laid-Open No. 6-262893 discloses that either a latent image or background applied on the surface of a base paper is formed with a halftone dot of about 150% and 10%, and the other is formed with a concentric pattern. The fine lines constituting the pattern circle have a thickness of 1/10 mm, the distance S between the fine lines is about 1/2 mm, the latent image and the background are the same color, and the fine lines constituting the concentric circle pattern are halftone dots Similarly, an infinite number of copier-adaptive copy forgery prevention sheets are disclosed. According to this anti-counterfeit paper, the thin lines that make up the concentric pattern are not conspicuous, so it is usually impossible to distinguish them from halftone dots, and the latent image and background are observed on a flat surface with the naked eye. Regardless of the type of the image, the latent image appears clearly regardless of the light scanning direction and how the paper is placed, and the moire is generated, so that the latent image and the moire can be visually recognized to prevent forgery. (For example, refer to Patent Document 4)

  The applicants of the present application have also proposed the invention described in JP-A-9-20061. According to the present invention, a plurality of polygons having a line width of a certain line width are displayed on the outward direction of a line segment forming a side of the polygon in a quantitative continuous expansion with the same line width as that of the polygon line segment. A line is drawn, and the inward line segment forming the side of the polygon is given a contracted array with the same stroke width as the polygonal line segment, and the line segment forming the side of the polygon is quantitatively expanded continuously. And a printed product of a copy-preventing pattern composed of a collection of line drawings in which line drawings that have been contracted and line drawings that have been contracted are arranged at equal intervals (see, for example, Patent Document 5).

  However, these moiré pattern generation techniques have different effects depending on the input / output resolution of the color copying machine, and recently, the generation of moiré can be suppressed by filtering in image processing. It is difficult to say that this is a preventive measure.

  On the other hand, in Japanese Examined Patent Publication No. 56-19273, a printing surface is obtained by intaglio printing an image composed of vertical and horizontal lines on a printing substrate as a method of displaying an image by inclining the printed matter. A method has been disclosed in which a latent image that cannot be confirmed when viewed from directly above is visualized when viewed from a different angle (see, for example, Patent Document 6).

  In Japanese Patent Laid-Open No. 5-339900, a material having various uneven shapes of various line patterns or relief patterns, and a pattern of both of them, and a constant by different colors other than the color of the material and colorless and transparent Latent image pattern that can recognize specific characters, designs, etc. only when observing from a specific direction by combining various line strokes or halftone strokes with various intervals, or both A formed body and a manufacturing method thereof are disclosed (for example, see Patent Document 7).

Reality 2-43747 Actual Kaihei 1-36866 Japanese Utility Model Publication No. 5-12173 JP-A-6-262893 JP-A-9-20061 JP-B 56-19273 JP-A-5-339900

  Since the conventional printed matter described above is a technology that has an excellent anti-copying effect, it can be easily determined whether the original printed matter is a copied matter. However, the authenticity of the original printed matter can be determined by a simple discriminator such as a magnifying glass. It was necessary. In addition, these techniques for generating patterns due to moire have different effects depending on the input / output resolution of the color copying machine.

  In addition, recently, the generation of moire can be suppressed by filtering in image processing. Therefore, the generation of moire has not been a sufficient anti-counterfeit measure.

  In view of the above circumstances, there is a demand for a forgery-preventing printed material that can easily determine whether a copy of the original printed material is a copied material, and can determine the authenticity of the original printed material without using a simple discriminating tool such as a magnifying glass. . According to the present invention, by providing a three-dimensional configuration to a part of a pattern that generates moiré composed of curved lines, it is possible to easily determine whether the copy of the original print is a copy or not. An object of the present invention is to provide an anti-counterfeit printed matter that can be discriminated without using a simple discriminating tool such as a magnifying glass.

  The present invention includes a first image line having a predetermined image line width printed on a substrate, a second image line, a third image line, the (n-1) th image line, and an nth image line. In the anti-counterfeit printed matter formed by the image line group, the first image line, the second image line, the third image line,... The n−1th image line and the nth image. Lines are arranged at equal intervals or substantially equal intervals, the first image line is formed by a straight line, the nth image line is formed by a predetermined curve, and the first image line and the nth image line are formed. The second image line, the third image line,..., The (n-1) th image line formed between the lines is defined by the shape of the straight line of the first image line. Formed in a form gradually approaching the shape of the predetermined curve of the line, the image line of the image line group is composed of a low image area part and a high image line part with different height of rise from the base material, Low image area Respect et consisting region, characterized by being composed of the invisible image by a difference between the region composed of the high imaging portion.

  The present invention also provides a first image line, a second image line, a third image line,... The (n-1) th image line, and an nth image, each having a predetermined image line width printed on a substrate. In the anti-counterfeit printed matter having at least one image line group composed of lines, the first image line, the second image line, the third image line, the n-1th image line, and the The nth image lines are arranged at equal or substantially equal intervals, and the first image line, the second image line, the third image line,..., The n-1th image line and the first image line. The n image line is formed as a straight line, and when the first image line is arranged at 0 degree, the nth image line is arranged at a predetermined angle with respect to the first image line. , The second image line formed between the first image line and the nth image line, the third image line, ... the n-1th image line is the first image line. The 0th to the nth image of the stroke The image line of the image line group is formed by a low image line portion and a high image line portion having different heights from the base material, and the low image line is formed. An invisible image is formed by a difference in height between the region formed of the portion and the region formed of the high image line portion.

  In the anti-counterfeit printed matter of the present invention, since the copy of the anti-counterfeit printed matter is moire, it can be easily determined that the copy is a copied matter. Further, it is possible to determine whether the original printed material is genuine or not based on whether or not the invisible image becomes visible when the original printed material is observed at an angle. Therefore, it is possible to determine the authenticity of the original printed matter without using a conventional simple determination tool such as a magnifying glass.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings for a forgery-preventing printed material according to Embodiments 1 to 3 of the present invention. However, the present invention is not limited to the best mode for carrying out the invention described below, and various other embodiments are included within the scope of the technology described in the claims.

  FIG. 1 is an explanatory diagram showing a three-dimensional structure of an image line, which is a feature of the present invention. FIG. 1A is a plan view of the printed matter 1, and an image line group 2 is formed on the printed matter 1. The image line group 2 is composed of a plurality of image lines with equal image line widths arranged at equal intervals, and as shown in the front view of FIG. It is composed of a low image line portion 3 and a high image line portion 4 having different sizes. As a result, as shown in the plan view of FIG. 1A, when the printed matter 1 is observed from directly above, the height of the swell of the low image portion 3 and the high image portion 4 is not recognized. In other words, the region formed by the high image portion 4 can be applied as an invisible image to the low image portion 3 configuring the background pattern.

  FIG. 2 is a side view of the printed matter 1 shown in FIG. As shown in FIG. 2, when an observer observes at a viewing angle 5 of an arbitrary angle, a difference in appearance appears depending on the height of the low image portion 3 and the high image portion 4. The viewing length 3b of the high image portion 4 looks longer than the viewing length 3a of the low image portion 3. That is, as shown in the perspective view of FIG. 3, in the image line group 2, the visual length 3 b of the high image portion 4 appears to be longer than the visual length 3 a of the low image portion 3. The high image area 4 is observed at a higher density than the low image area 3. As a result, the invisible image formed of the area formed by the high image line portion 4 appears as a visible image when observed from an oblique direction. There is no limitation on the line pitch in the image line group 2 and the heights of the low image area 3 and the high image area 4, but the image line widths of the low image area 3 and the high image area 4 are 200˜. It is desirable that the image line pitch is 300 to 800 μm at 600 μm, the height of the low image area 3 is 10 to 30 μm, and the height of the high image area 4 is about 20 to 60 μm. The difference between the height of the low image portion 3 and the height of the high image portion 4 is not particularly limited, but is preferably about 10 to 50 μm.

  Note that the image line group 2 shown in FIG. 1 is all described in a linear shape, but a curved shape is preferable in order to achieve the effects of the present invention. In addition, the printing medium used for the printed material 1 is not limited in any way, such as high-quality paper, coated paper, and the plate making and printing method for transferring the image line group 2 to the printing medium are also intaglio printing, screen printing, etc. There is no limitation as long as it can be raised from the printed surface.

(1) Embodiment 1
An anti-counterfeit printed matter according to Embodiment 1 of the present invention will be described.
FIG. 4A is a plan view showing a printed matter in the first embodiment. Image line group composed of a first image line, a second image line, a third image line,... The (n-1) th image line, and an nth image line having a predetermined image line width printed on the substrate. 2 is formed. The image line group 2 on the printed material 1 is composed of a low image line part 3 and a high image line part 4 which are equally or substantially equally spaced. The low image line part 3 and the high image line part 4 are linear images. Gradually approaching from a line to a curvilinear shape, it is a deformed line shape. In the first embodiment, an arbitrary figure, for example, an alphabet letter “NPB” as shown in FIG. 4A is formed by the high image portion 4 with respect to the low image portion 3 constituting the background pattern. It is arranged as an invisible image (in Embodiment 1, the boundary is expressed by a dotted line for easy understanding of the position, but the dotted line itself is not printed and the boundary cannot be visually recognized). When the image line group 2 shown in FIG. 4A is observed at an oblique angle as shown in FIGS. 2 and 3, as shown in FIG. 4B, the low image area 3 Due to the difference in height between the high image line portion 4 and the high image line portion 4, the region formed by the high image line portion 4 appears as a visible image.

  Further, when the printed material 1 shown in FIG. 4A is copied by a color copying machine, a printed material 1 'shown in FIG. 5A is obtained. As shown in FIG. 5A, the scanning line of the color copying machine interferes with the image line group 2, and moire occurs. As shown in FIG. 5 (b), in the copy 1 ′, there is no difference in the height of the low image portion 3 ′ and the high image portion 4 ′ in the image line group 2 ′, and the high image line. Since the invisible image formed by the unit 4 does not become a visible image, it becomes obvious at a glance that this is a copied image.

(2) Embodiment 2
The forgery prevention printed matter according to Embodiment 2 of the present invention will be described.
FIG. 6A is a plan view showing a printed matter in the second embodiment. Image line group consisting of a first image line, a second image line, a third image line,... N-1th image line and an nth image line having a predetermined image line width printed on the base material. 2 is formed. The image line group 2 on the printed material 1 is composed of a low image line portion 3 and a high image line portion 4 that are equally or substantially equally spaced. The low image line portion 3 and the high image line portion 4 are linear images. Gradually approaching from a line to a curvilinear shape, it is a deformed line shape. In the second embodiment, the lower curve is more complicated than in the first embodiment. In the second embodiment, an arbitrary figure, for example, an alphabet letter “NPB” as shown in FIG. 6A is formed by the high image portion 4 with respect to the low image portion 3 constituting the background pattern. It is arranged as an invisible image (in the second embodiment, the boundary is expressed by a dotted line for easy understanding of the position, but the dotted line itself is not printed and the boundary cannot be visually recognized). When the image line group 2 shown in FIG. 6A is observed at an oblique angle as shown in FIGS. 2 and 3, as shown in FIG. Due to the difference in height between the high image line portion 4 and the high image line portion 4, the region formed by the high image line portion 4 appears as a visible image.

  Further, when the printed material 1 shown in FIG. 6A is copied by a color copying machine, a printed material 1 'shown in FIG. 7A is obtained. As shown in FIG. 7A, the scanning line of the color copying machine interferes with the image line group 2, and moire occurs. As shown in FIG. 7B, in the copy 1 ′, there is no difference in the height of the low image portion 3 ′ and the high image portion 4 ′ in the image line group 2 ′, and the high image line. Since the invisible image formed by the unit 4 does not become a visible image, it becomes obvious at a glance that this is a copied image.

  That is, in the first and second embodiments, the first image line, the second image line, the third image line,. The image line group is formed by the image line group including the nth image line and the nth image line. The first image line, the second image line, the third image line,..., The (n-1) th image line and the nth image line are arranged at equal intervals or substantially equal intervals. It is formed with a straight line, and the nth image line is formed with a predetermined curve. The second image line formed between the first image line and the n-th image line, the third image line,..., The (n−1) -th image line is derived from the shape of the straight line of the first image line. It is formed so as to gradually approach the shape of a predetermined curve of the nth image line, and the image line of the image line group is composed of a low image area portion and a high image area portion having different heights of rise from the base material. The invisible image is configured by the difference in height between the area composed of the low image area and the area composed of the high image area.

(3) Embodiment 3
The forgery prevention printed matter according to Embodiment 3 of the present invention will be described.
FIG. 8A is a plan view showing a printed matter in the third embodiment. Image line group consisting of a first image line, a second image line, a third image line,... N-1th image line and an nth image line having a predetermined image line width printed on the base material. 2 is formed. The image line group 2 on the printed material 1 is composed of a low image line part 3 and a high image line part 4 which are equally or substantially equally spaced. The low image line part 3 and the high image line part 4 are linear images. The shape of the drawing line is formed by gradually approaching a curved line from a straight line arranged at an appropriate angle from the line and deforming. In the third embodiment, an arbitrary figure, for example, a letter of the alphabet “NPB” as shown in FIG. 8A is formed by the high image portion 4 with respect to the low image portion 3 constituting the background pattern. It is arranged as an invisible image (in the third embodiment, the boundary is expressed by a dotted line for easy understanding of the position, but the dotted line itself is not printed and the boundary cannot be visually recognized). The image line group 2 is formed by four regions, and the alphabet of “NPB” is formed across the four regions, but the present invention is not limited to this, and the image line group 2 is one or more. If it is the area | region, it is good. When the image line group 2 shown in FIG. 8 (a) is observed at an oblique angle as shown in FIGS. 2 and 3, as shown in FIG. Due to the difference in the height of the high image portion 4, the region formed by the high image portion 4 appears as a visible image.

  Further, when the printed material 1 shown in FIG. 8A is copied by a color copying machine, a printed material 1 'shown in FIG. 9A is obtained. As shown in FIG. 9A, the scanning line of the color copier and the image line group 2 interfere with each other to generate moire. As shown in FIG. 9B, in the copy 1 ′, there is no difference in the height of the low image portion 3 ′ and the high image portion 4 ′ in the image line group 2 ′, and the high image line. Since the invisible image formed by the unit 4 does not become a visible image, it becomes obvious at a glance that this is a copied image.

  In other words, in the third embodiment, the first image line, the second image line, the third image line,. A line group composed of n lines has at least one. The first image line, the second image line, the third image line,..., The (n−1) -th image line and the n-th image line are arranged at equal intervals or substantially equal intervals. The second image line, the third image line,..., The (n−1) -th image line and the n-th image line are formed as straight lines, and when the first image line is arranged at 0 degree, the n-th image line The image line is arranged at a predetermined angle with respect to the first image line. The second image line formed between the first image line and the nth image line, the third image line,..., The (n−1) th image line is from the 0th degree of the first image line. The image line of the image line group is formed by a low image line portion and a high image line portion having different heights of elevation from the base material. The invisible image is formed by the difference in height between the region formed of the portion and the region formed of the high image portion.

Explanatory drawing which shows the three-dimensional structure of this invention. The side view of the printed matter 1 shown by FIG. The perspective view of the printed matter 1 of this invention. FIG. 2 is a plan view and a perspective view showing a printed matter in the first embodiment. FIG. 2 is a plan view and a perspective view showing a copy of the printed matter in the first embodiment. The top view which shows the printed matter in Embodiment 2, and its perspective view. FIG. 6 is a plan view and a perspective view showing a copy of a printed matter in the second embodiment. FIG. 6 is a plan view showing a printed matter in Embodiment 3 and a perspective view thereof. FIG. 6 is a plan view and a perspective view showing a copy of a printed material in a third embodiment.

Explanation of symbols

1 Print 1 'Copy 2 Image group 2' Image group 3 Low image area 3 'Low image area 4 High image area 4' High image area 5 Viewing angle

Claims (2)

Image line group consisting of a first image line, a second image line, a third image line,..., An (n-1) th image line and an nth image line, each having a predetermined image line width to be printed on a substrate. In the anti-counterfeit printed matter formed by
The first image line, the second image line, the third image line, the n-1th image line and the nth image line are arranged at equal intervals or substantially equal intervals,
The first image line is formed by a straight line, the nth image line is formed by a predetermined curve,
The second image line formed between the first image line and the nth image line, the third image line, ... the n-1th image line is the first image line. Formed from the shape of the straight line to gradually approach the shape of the predetermined curve of the nth image line,
The image line of the image line group is composed of a low image line part and a high image line part with different heights of rise from the base material,
An anti-counterfeit printed matter, wherein an invisible image is formed by a difference in height between an area composed of the low image area and an area composed of the high image area. Image line group consisting of a first image line, a second image line, a third image line,..., An (n-1) th image line and an nth image line, each having a predetermined image line width to be printed on a substrate. In the anti-counterfeit printed matter having at least one,
The first image line, the second image line, the third image line, the n-1th image line and the nth image line are arranged at equal intervals or substantially equal intervals,
The first image line, the second image line, the third image line, the n-1th image line and the nth image line are formed as straight lines,
When the first image line is arranged at 0 degree, the n-th image line is arranged at a predetermined angle with respect to the first image line,
The second image line formed between the first image line and the nth image line, the third image line, ... the n-1th image line is the first image line. Formed gradually from the 0 degree of the line to the predetermined angle of the nth image line,
The image line of the image line group is composed of a low image line part and a high image line part with different heights of rise from the base material,
An anti-counterfeit printed matter, wherein an invisible image is formed by a difference in height between an area composed of the low image area and an area composed of the high image area.

Images