JP5721104B2 - Anti-counterfeit carrier - Google Patents

Description

  The present invention relates to a forgery-preventing carrier in which a latent image appears by varying the observation angle for preventing counterfeiting and duplication of banknotes, passports, securities, gift certificates, various certificates, and the like. .

  Various anti-counterfeiting technologies are applied to valuable printed matter such as banknotes, passports, securities, gift certificates, and various certificates in order to prevent forgery, alteration and copying. Among them, various techniques for forming a latent image have been proposed. For example, a convex image line is formed by using a printing method capable of forming a convex image line on a substrate, such as intaglio printing, gravure printing, or screen printing, or embossing, laser processing, cleaning, etc. The latent image pattern is formed by tilting the base material by forming a convex image line by processing the base material itself, and printing the colored ink so that at least part of it overlaps the convex image line. There is technology to make it appear.

  For example, the applicant of the present invention is not limited to the color of the base material or colorless and transparent to the uneven base material formed by embossing the line pattern and / or the relief pattern that represents the design by partially different angles. By using different colors of ink, lines with constant intervals are printed parallel or inclined to the parts other than the concavo-convex pattern so that only the line pattern is visible when viewed from the front. However, when viewed from an oblique direction, the latent image pattern formed by the concavo-convex shape can be easily visually recognized by the non-constant positional relationship between the image line by the concavo-convex shape and the image line by the colored ink. An application for an image pattern formed body has been filed (for example, see Patent Document 1).

  The latent image pattern forming body for anti-counterfeit described in Patent Document 1 can form a latent image pattern by concavo-convex processing on a base material and fusion with fine lines, and is excellent in preventing counterfeiting and duplication. However, there is only one kind of latent image pattern that can be formed, and there has been a demand for restrictions on the design surface and further advancement of anti-counterfeiting technology.

  Therefore, the present applicant has applied for a technique capable of appearing two or more latent image patterns (see, for example, Patent Document 2).

  In the latent image pattern forming body for preventing counterfeit described in Patent Document 2, a relief pattern composed of relief lines having a raised cross section of the same color as that of the base material is formed on the base material surface. It protrudes from the base line part extending in the longitudinal direction to one side with respect to the longitudinal direction, and has one or more convex parts formed along the longitudinal direction. The convex part extends laterally with respect to the longitudinal direction. A plurality of step portions having both side portions and a top portion parallel to the base line portion are formed in a pyramid shape, and are parallel to the relief line so as to overlap the convex part of the relief line. When printing lines are printed so as to extend, when a plurality of different observation angles corresponding to the number of step portions are observed from an oblique direction, different latent image patterns can be observed according to the observation angles.

  Further, as a technique capable of appearing other two or more latent image images, a latent image pattern having fine line-shaped convex portions having a predetermined pitch and line width and extending in a predetermined direction, and the latent image One image of the intaglio printed matter that is composed of a fine line-shaped convex portion that has the same pitch and line width as the latent image pattern and extends in the direction perpendicular to the latent image pattern outside the pattern area A plurality of images having substantially the same pitch and line width are synthesized by shifting the angle between the line-shaped convex portions of the latent image pattern and the line-shaped convex portions of the background portion constituting each of the images. An intaglio printed matter is disclosed in which the line-shaped convex portions of other images between every other line-shaped convex portions forming the background portion of the image are removed (see, for example, Patent Document 3). .

  The intaglio printed matter described in Patent Document 3 is one in which different latent image patterns can be visually recognized when viewed from the observation direction corresponding to the arrangement direction of each line-shaped convex portion forming each image, and is synthesized. There can be two or more images, so-called latent image patterns that can appear.

  In addition, as a technology that can provide two latent image images by applying a concavo-convex shape to the base material itself, a display surface having regularly arranged concavo-convex shapes, and on the display surface A first straight line group in which first straight lines substantially parallel to the extending direction of the concavo-convex shape are arranged at a predetermined pitch, and a straight line parallel to the first straight line and perpendicular to the first straight line And a second straight line group arranged at the same pitch as the first straight line group, and a character and / or symbol displayed on the first straight line group and the second straight line group. An image display medium having different characters and / or designs to be displayed in the straight line group is disclosed (for example, see Patent Document 4).

  In the image display medium described in Patent Document 4, when the substrate is observed from one oblique direction, the characters and / or symbols displayed in the first straight line group can be visually recognized, and the substrate is viewed from the other oblique direction on the opposite side. When observed, the characters and / or symbols displayed in the second straight line group can be visually recognized, and two latent image patterns can appear.

  Further, the applicant of the present invention provides a plurality of basic image forming portions in which concave portions are continuously arranged in one direction so as to include an inner surface having a predetermined inclination angle on a light-transmitting base material, and the basic image formation thereof A plurality of latent image forming portions having notches or protrusions having an inclination angle different from a predetermined inclination angle are formed on the inner surface or surface of the portion, the basic image forming portion forms a background image, and a latent image is formed. An image forming body in which an image image forming unit forms a latent image is filed (see, for example, Patent Document 5).

  When the image forming body described in Patent Document 5 is observed from the vertical direction directly above the substrate surface, it can be confirmed that uneven lines are formed on the transparent substrate. When viewed from the oblique direction in which the side on which the latent image image forming unit is formed can be observed, the latent image can be confirmed by the difference in the refraction angle of reflected light between the basic image forming unit and the latent image forming unit. It should be noted that two or more latent image images can be formed by forming the latent image forming portions with different inclination angles on the inner surface of the concave portion.

Japanese Patent No. 2615401 Japanese Patent No. 4281149 Japanese Patent No. 4442320 JP 2002-326442 A JP 2007-168341 A

  However, the forgery-preventing latent image pattern formed body disclosed in Patent Document 2 is a technique that can form a plurality of latent image patterns by concavo-convex processing on a base material and fusion with fine lines. Since the lines are formed in a pyramid shape, the shape of the latent image pattern actually formed is all monotonous (for example, a quadrangle), and is different when the observation angle is varied (for example, A). The letter changed to the letter B) was not visible.

  In addition, the intaglio printed matter having a latent image pattern disclosed in Patent Document 3 is a technology that can form a plurality of latent image patterns that can be visually recognized in different observation directions. Since it forms a line | wire, there existed a problem that a base material will be limited to a paper base material. In addition, the convex and concave portions are formed by the intaglio printing method, the concave and convex shapes are formed on the base material itself, and the latent image is formed by fusion with a printed image line formed by a different method (for example, offset printing method). Since it does not form an image pattern, the intaglio printing method or other printing method capable of forming convex portions (for example, a screen printing method or a gravure printing method), although there is some difficulty in designing the latent image pattern itself. Etc.), a similar printed matter could be produced.

  In addition, the image display medium disclosed in Patent Document 4 has two different latent image patterns by varying the observation angle by fusing the uneven image line formed on the substrate itself and the print image line. Although it is a technology that can be visually recognized, an image line for forming two latent image patterns is regularly printed on each slope on the slope of the convex and concave portions formed on the base material itself. There is a problem that precise positioning is required.

  In addition, the image forming body disclosed in Patent Document 5 is formed by forming a recess in a base material by laser processing, and further forming notches with different inclination angles by laser processing on the inner surface of the recess. Although it is a technique capable of forming the above-described latent image, it is a formation of a latent image using the refractive index of reflected light, and the substrate is limited to being light transmissive. Furthermore, since the recesses and notches on the substrate are all formed by laser processing, no one can easily manufacture the laser processing machine in terms of its relatively high cost, and the counterfeit deterrence is also low. Although it has been secured to some extent, if a laser processing machine can be obtained on the contrary, there is a possibility that a formed body having the same effect may be manufactured, and a technology with a further high anti-counterfeit effect Was desired.

  The present invention aims to solve such a conventional problem, and is not particularly limited to the type of the substrate as long as the uneven shape can be formed on the substrate, and the unevenness formed on the substrate. It is possible to form a latent image by fusing the shape and the printed image line, and the position accuracy of the printed image line is not required so much, and two different latent image images can be visually recognized by changing the observation angle. The object is to propose a carrier having a high anti-counterfeit effect.

  The present invention has a latent image forming region on at least a part of a base material, and a plurality of convex first image lines formed on the base material itself are regularly arranged in the latent image forming region. A first image line group and a second image line arranged in parallel on the first image line and regularly arranged in a plurality of second image lines formed with printing ink of a color different from the color of the substrate The first image line group includes a plurality of first image lines each having a first cutout portion in which one convex slope is partially omitted, and the second image line group. Are arranged so as to straddle both convex slopes of the first image line, and are provided with a first latent image portion to which printing ink is not applied at the same position as the first notch portion. A first latent image is formed by a plurality of first cutout portions and first latent image portions that have a plurality of two image lines, and the first latent image is perpendicular to the substrate surface. How to observe The second image line group can be confirmed by observing from the side, and the one slope side where the first notch portion and the first latent image portion are arranged is viewed from the second observation direction oblique to the substrate. A forgery prevention carrier characterized in that the first latent image can be confirmed by observation.

  The first image line group in the forgery-preventing carrier of the present invention is the first image group in which a part of the convex shape is missing on the other slope opposite to the one slope where the first notch is formed. A second latent image portion having a plurality of first image lines having two notch portions, wherein the second image line group is not applied with printing ink at the same position as the second notch portion; A second latent image is formed by a plurality of second cutout portions and second latent image portions, and the second cutout portions and The second latent image can be further confirmed by observing the other inclined surface on which the second latent image portion is disposed from a third observation direction oblique to the substrate.

  In the forgery prevention carrier of the present invention, the first image line group has a first image line in which the first notch portion and the second notch portion are formed in the same or different image lines. It is characterized by that.

  Further, in the forgery prevention carrier of the present invention, when the first notch and the second notch are formed on the same first image line, the first notch and the second notch The part is formed at a position where at least a part overlaps.

  The forgery-preventing carrier of the present invention can recognize only a uniform line even when viewed from directly above the substrate surface, or the first latent image and the second latent image. Both are visible at the same time, but when viewed from one oblique direction with different observation angles, the first latent image can be visually recognized, and when viewed from the other oblique direction, the first latent image is completely different. Only a different second latent image is visible. Therefore, since different latent image images can be confirmed depending on the observation angle, it is possible to easily determine authenticity.

The figure which shows an example of the forgery prevention carrier in this invention. The figure for demonstrating the state which observed the latent-image image formation area from the 1st observation direction. The figure for demonstrating the state which observed the latent-image image formation area from the 2nd and 3rd observation direction. The figure for demonstrating the structure of a latent image image formation area. The figure for demonstrating a 1st drawing line group. The figure for demonstrating the shape of a 1st drawing line. The figure for demonstrating the line width and pitch of a 1st line. The figure for demonstrating a notch part. The figure for demonstrating a 1st notch part. The figure for demonstrating the width | variety and length of a notch part. The figure for demonstrating the height of a notch part. The figure for demonstrating the 2nd drawing line group. The figure for demonstrating the line width of a 2nd line. The figure for demonstrating the 1st aspect of a latent image part. The figure for demonstrating the 2nd aspect of a latent image part. The enlarged view for demonstrating the 2nd aspect of a latent image part. The figure for demonstrating the width | variety and length of a latent-image part. The figure for demonstrating another example of the width | variety and length of a latent-image part. The figure for demonstrating a 1st latent image part and a 2nd latent image part. The figure for demonstrating the example of arrangement | positioning of a 1st latent image part and a 2nd latent image part. The figure for demonstrating another example of arrangement | positioning of a 1st latent image part and a 2nd latent image part. Sectional drawing when the 1st latent image part and the 2nd latent image part are formed in the overlapped area | region. The figure for demonstrating the observation principle of the forgery prevention carrier of this invention.

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

  FIG. 1 is a diagram showing an example of an anti-counterfeit carrier (1) (hereinafter referred to as a “carrier”) in the present invention. As shown in FIG. 1, the carrier (1) has a latent image forming region (3) in which a latent image according to the present invention is formed on at least a part of the substrate (2). . As shown in FIG. 1, in areas other than the latent image forming area (3), necessary information such as fees, characters, and other patterns are printed by known printing methods (for example, offset printing, intaglio printing, etc. ).

  As the substrate (2) in the present invention, paper such as high-quality paper, coated paper, art paper, film, plastic and the like can be used. However, in order to form a latent image which is a feature of the present invention, it is necessary to form a convex portion on the base material, and therefore it is preferable to use a base material having a predetermined thickness. The height and the like of the convex portion will be described in detail when the first image line formed in the latent image forming region (3) is described.

2 and 3 are views showing a state when the latent image forming region (3) in the carrier (1) is observed under a predetermined condition. The carrier (1) according to the present invention will be described in detail later, but the first image line is composed of at least part of the base (2) and the convex and concave portions formed on the base (2). The first image line group (5) arranged in a line shape (4) and the second image line (6) in a line shape by colored ink on the first image line (4). A printed second image line group (7) is formed. FIG. 2A is a view when the substrate (2) is observed from directly above (hereinafter referred to as “first observation direction (V ₁ )”), and FIG. It is a figure which shows the latent image image formation area | region (3) which can be confirmed in FIG. When the base material (2) is observed from the first observation direction (V ₁ ), the second image line group (7) can be confirmed as shown in FIG.

FIG. 3A shows an observation from a direction perpendicular to the direction in which the first image line (4) and the second image line (6) are arranged, and from an oblique direction to the base material (2). (Hereinafter referred to as “second viewing direction (V ₂ )”), and FIG. 3B is a diagram showing a latent image forming region (3) that can be confirmed at that time. When the base material (2) is observed from the second observation direction (V ₂ ), the first latent image (8a) is blank in the second image line (6) as shown in FIG. 3 (b). It can be confirmed as an image. FIG. 3B shows a state where the first latent image (8a) “A” can be confirmed.

FIG. 3C shows an oblique direction opposite to the second observation direction (V ₂ ) with respect to the direction in which the first image line (4) and the second image line (6) are arranged. when observed from (hereinafter, referred to as "the third viewing direction (V _3)".) are views, FIG. 3 (d), a diagram showing the latent image forming area (3) can be confirmed at that time is there. When the base material (2) is observed from the third observation direction (V ₃ ), the second latent image (8b) is blank from the second image line (6) as shown in FIG. 3 (d). It can be confirmed as an image. FIG. 3D shows a state where a second latent image (8b) “B” can be confirmed.

As described above, when the carrier (1) in the present invention is observed from the first observation direction (V ₁ ) with respect to the substrate (2), the second image line group (7) printed with colored ink is used. When the image is observed from the second observation direction (V ₂ ), the first latent image (8a) can be confirmed, and when the image is observed from the third observation direction (V ₃ ), the second latent image ( 8b) can be confirmed.

  In addition, in FIG. 3, although demonstrated in the aspect which can confirm two latent image images of a 1st latent image image (8a) and a 2nd latent image image (8b), the carrier (1) of this invention is Only one of the latent image images (8) may be formed.

  Hereinafter, the configuration of the latent image forming area (3) forming the latent image (8) will be described.

FIG. 4A shows the latent image forming region (3) when the base material (2) is observed from the first observation direction (V ₁ ). As described above, when observed from the first observation direction (V ₁ ), the second image line group (7) printed with colored ink can be confirmed, but this latent image image formation region (3) is 4 (b), the first image line group (5) in which the first image lines (4) are arranged in a line, and the second image line (5) as shown in FIG. 4 (c). The image line (6) is composed of two image line groups of the second image line group (7) arranged in a line. In the present invention, “line-like” means a state in which a plurality of image lines are regularly arranged at a predetermined pitch.

  Further, each image line has elements for forming the latent image (8), the first image line (4) has a notch (9), and the second line. A latent image portion (10) is formed on the image line (6).

  Hereinafter, each image line will be described in detail. First, the first image line (4) will be described.

(First drawing line)
A 1st image line (4) gives unevenness | corrugation shape to base material (2) itself, and makes the convex part an image line. Therefore, it is necessary to provide the concave and convex shape so that the convex portion becomes the image line, and it is necessary to apply the first image line (4) including the convex portion so as to be arranged in a line. Since the first image line (4) is formed by processing the base material (2) itself, it becomes an image line of the same color as the color of the base material (2).

  As a method for forming the first image line (4), if the substrate (2) is paper, for example, it may be applied by squeezing at the paper manufacturing stage, or by known laser processing or embossing. You may give it. Moreover, when a base material (2) is a film or a plastic, it can form by laser processing or embossing.

FIG. 5 is a diagram for explaining the first image line (4). FIG. 5A is a view of only the first image line group (5) formed in the latent image forming region (3) as viewed from the first observation direction (V ₁ ). As shown in FIG. 5A, in the first image line group (5), the first image lines (4) are arranged in a single line, and a plurality of arranged first image lines ( In a part of the image line 4), there is a first image line (4) having a portion with a different image line width. A portion having different image line widths is referred to as a notch (9), and the plurality of notches (9) are one element for forming the latent image (8). In FIG. 5A, the latent image (8) ("A" and "B" on the drawing) formed by the notch (9) can be confirmed, but this is easy to understand for explanation. Since the actual notch (9) has the same color as the base material (2) as described above, it can be confirmed from the first observation direction (V ₁ ). Can not.

  XX 'sectional views in FIG. 5 (a) are shown in FIGS. 5 (b) and 5 (c). As shown in FIGS. 5B and 5C, the first image line (4) uses, as the image line, a convex portion formed by applying an uneven shape to the substrate (2). The height (H) of the convex portion varies depending on the type of the substrate (2), and is in the range of 20 to 60 μm when the substrate (2) is paper. If the thickness is 20 μm or less, the second image line (6) by colored ink printed on the first image line (4) described later is also printed on the notch (9). This is because the image image (8) cannot be formed. In addition, because the thickness of the high-quality paper or coated paper used for the paper sheet is about 100 μm, it is difficult to form a convex portion of 60 μm or more.

  When the substrate (2) is a plastic or film, the lower limit of the height (H) of the convex portion is 20 μm as in the case of the paper substrate, but it can be sufficiently thicker than the paper substrate. For this reason, there is no restriction on the upper limit. However, if the unevenness difference is too large, it is difficult to visually recognize near, so 300 μm or less is preferable. Accordingly, the image height (H) of the first image line (4) in the present invention is in the range of 20 to 300 μm, and can be appropriately designed within the range depending on the type of the substrate.

  The convex shape of the first image line (4) is not particularly limited, and various shapes can be mentioned as shown in FIG. For example, FIG. 6 (a) is a trapezoid, FIG. 6 (b) is a semi-circle or semi-ellipse, and FIG. 6 (c) is a triangle. In the example of FIGS. 6A to 6C, the left and right are equally shaped with the vertex (Q) as the boundary, but the first image line (4) of the present invention is thus the left and right equally convex shape. The shape is not limited to the above, and may be an uneven shape as shown in FIG. In the case of an image line having a trapezoidal shape as shown in FIG. 6A, the center of the upper side is the vertex (Q).

  The shape of the first image line (4) of the present invention may be a convex shape and may have slopes on both sides with the vertex (Q) as a boundary. This is because the second image line (6) is overlapped and printed so as to straddle the vertex (Q) on the first image line (4) and cover the slopes on both sides. As shown in FIG. 2, the second image line (6) is not printed in a shape that is perpendicular to the base material (2) without one side being a slope as a boundary. Therefore, it is incompatible with the first image line (4).

  In the case of the triangular convex shape as shown in FIGS. 6C and 6D, too, if the apex angle with respect to the vertex (Q) becomes too small, the second image line (6) is again placed on both sides. Since it becomes impossible to print on a slope, it is not preferable. Therefore, a trapezoid as shown in FIG. 6A or a semicircular or semi-elliptical shape having a gentle slope as shown in FIG. 6B is preferable. In the present invention, even a shape such as a semicircular shape or a semi-elliptical shape has a slope with a vertex (Q) as a boundary.

Next, the line width (W ₁ ) and pitch (P ₁ ) of the _first line (4) will be described with reference to FIG. The line width (W ₁ ) of the _first line (4) is formed in the range of 50 to 800 μm. This is because a line width narrower than 50 μm makes it difficult to form a notch (9) described later, and a line width wider than 800 μm can be visually confirmed by the first line (4) itself. Therefore, it is not preferable. For pitch _{(P 1)} when the first image line (4) is arranged in parallel line shape is formed in the range of 100 to 1000 [mu] m. If the pitch is smaller than 100 μm, it is difficult to process the uneven shape for forming the first image line (4), and the first image line (4) cannot be formed substantially. On the other hand, a pitch wider than 1000 μm is not preferable because the formed latent image (8) is an uncomfortable image.

  In the plurality of first image lines (4) constituting the first image line group (5), as shown in FIGS. 5B and 5C, a latent image (8) is formed. There is an image line having a notch (9) as one element for the purpose. Hereinafter, the notch (9) will be described.

  The notch (9) is formed in the first image line (4), and as shown in FIG. 8, one slope side of the first image line (4) having a convex shape is missing. It is in a state. This notch (9) can be formed on the slopes on both sides in the convex shape of the first drawing line (4), and is formed on one slope side as shown in FIG. The cutout portion (9) is referred to as a first cutout portion (9a), and the cutout portion (9) formed on the other slope side on the opposite side is referred to as a second cutout portion (9b). In FIG. 8, a virtual line is shown by a dotted line for easy explanation of the notch (9), but it does not actually exist. Hereinafter, the virtual line is illustrated as needed in the description of the notch (9), but the same is true.

Although the line width (W ₁ ) of the _first image line (4) has been described with reference to FIG. 7, the upper and lower portions of the convex shape of the first image line (4), as shown in FIG. In FIG. 8, since the widths are different, the line width (W ₁ ) of the _first line (4) is the width of the lower portion of the convex shape as shown in FIG.

  3 to 5, the notch portion (9) is also the first notch portion (9a) with respect to the latent image image forming region (3) where two latent image images (8) are formed. Although it has been described that two of the second notches (9b) are formed on both slopes of the first drawing line (4), the present invention does not necessarily have the notches (9) on both slopes. As shown in FIG. 9, when forming one latent image (8), a notch is formed only on one slope of the first image line (4). (9) (In FIG. 9, only the first notch (9a) is formed).

The magnitude | size of a notch part (9) is demonstrated using FIG.10 and FIG.11. First, for the width (z ₁ ) of the notch (9) in FIG. 10, a line (Q ₁ -Q ₁ ′ line in FIG. 10) connecting the vertices (Q) of the first image line (4) is used. The boundary is set to be not more than half of the line width (W ₁ ) of the _first line (4). Therefore, since the line width (W ₁ ) of the _first line (4) is in the range of 50 to 800 μm as described above, the width (z ₁ ) of the notch (9) is in the range of 25 to 400 μm. It becomes. The length of the notch (9) (t ₁₎ is not particularly limited, the upper limit is equal to the length of the first streak. The length (t ₁ ) of the notch (9) is appropriately determined depending on the shape of the latent image (8) to be formed, and if it is shorter than 50 μm, the notch (9) is formed. This is because it is difficult to visually recognize. The notch (9) can be formed to the same length as the first image line (4), and the length of the first image line (4) is the latent image formed on the carrier (1). The upper limit of the length (t ₁ ) of the notch (9) is appropriately determined depending on the length of the first image line (4) because it is appropriately determined depending on the size of the image image forming area (3). The

  About the height (h) of a notch part (9), it is determined by the thickness of a base material (2), and also is a place which changes also with the kind of base material (2). For example, in the case of the base material (2) having a relatively high hardness such as plastic, there is no problem even if the height (h) of the notch portion (9) is set high. In the case of a low base material (2), if the height (h) of the notch (9) is set too high, the strength of the base material (2) itself will drop or a hole will open. There are also times when it goes wrong. Therefore, although depending on the thickness of the base material (2), it is desirable to leave about 50 μm of the base material (2) where the notch (9) is provided.

  The notch (9) may have a height (h) as high as the first image line (4) as shown in FIG. 11 (a), as shown in FIG. 11 (b). Moreover, as shown in the height (h) up to the middle of the first image line (4), or as shown in FIG. 11 (a) and 11 (b), the first image line (4) has a shape that is obliquely cut from the apex (Q) in the cross section of the first image line (4), as shown in FIG. 11 (c). In addition, it may be cut vertically from the vertex (Q) to the base material (2).

  The notch (9) is formed by removing the so-called base material (2), in which the first image line (4) is formed by the above-described method and then the notch is cut by laser processing. Is possible. Further, when the first image line (4) is formed by embossing, a notch (9) is formed in a part of the first image line on the embossing member (for example, a plate having unevenness) itself, It can be simultaneously formed on the paper substrate (2) by embossing. Further, when forming the first image line (4) by scoring, a notch (9) is formed in a part of the first image line of the member for scoring, and the paper substrate (2 ) At the same time.

(Second line)
Next, the second image line (6) printed with colored ink on the first image line (4) will be described. The notch portion (9) will be described in that the first notch portion (9a) and the second notch portion (9b) are formed in the first image line (4). .

  The second image line (6) is printed on the first image line (4) with a colored ink having a different color from the base material (2) and the first image line (4), and is arranged in a plurality. A second image line group (7) is formed. As shown in FIG. 12A, the second image line group (7) has a latent image portion (10) as an element for forming the latent image (8) (FIG. 12A). Then, the latent image (8) is “A” and “B”).

  The latent image portion (10) is already formed on the carrier (1), but at the actual design stage, as shown in FIG. 12 (b), the latent image portion (10). Is not formed and is visually recognized as a simple straight line.

  As a method for forming the second image line (6) on the first image line (4), a known printing method such as offset printing, screen printing, gravure printing, ink jet printing or the like can be used.

Next, the line width (W ₂ ) of the _second line will be described with reference to FIG. Since the second image line (6) is printed on the convex first image line (4), the image line width (W ₂ ) is the image line width (1) of the first image line (4). W ₁ ) or less is necessary. Therefore, since the line width (W ₁ ) of the _first line (4) is in the range of 50 to 800 μm, the upper limit of the line width (W ₂ ) of the _second line (6) is 800 μm. Become. Regarding the lower limit, it is necessary to have a width that allows the second image line (6) to be formed across the vertex (Q) of the first image line (4) having a convex shape. As 50 μm or more. Further, since the pitch (P ₂ ) of the first image line (4) prints the second image line (6) on the first image line (4), the pitch of the first image line (4) ( The same range of 100 to 1000 μm as P ₁ ).

The line width (W ₂ ) of the _second image line (6) is printed on the first image line (4) having a convex shape as shown in FIG. As shown in FIG. 13 (a), the width of the second image line (6) seen from the first observation direction (V ₁ ) and the second image seen from the second observation direction (V ₂ ). Although the length (W ₃ ) of the line width is different, the line width (W ₂ ) of the _second image line (6) in the present invention is the first observation direction shown in FIG. The line width (W ₂ ) that can be seen from (V ₁ ).

  Here, the latent image portion (10) formed on the second image line (6) will be described using the notch portion (9) formed on the first image line (4). For the second image line (6) including the latent image portion (10), the convex shape height (H) of the first image line (4) and the printing method of the second image line (6) are used. There are two modes. First, the first embodiment is shown in FIG.

FIG. 14A is a diagram when the latent image forming region (3) is observed from the first observation direction (V ₁ ). For the sake of explanation, the latent image (8) is shown for easy understanding. Although it is suggested, it can hardly be confirmed from the first observation direction (V ₁ ) in practice.

  FIG. 14B is an enlarged view of a portion surrounded by a dotted line in FIG. In FIG. 14 (b), the base material (2) and the first image line (4) are illustrated in different patterns. However, for the sake of convenience of explanation, the first image line (4) is shown. ) Is made by processing the base material (2) itself, so it is actually the same as the color of the base material, so the colors cannot be distinguished.

  As shown in FIG. 14B, the second image line (6) printed on the first image line (4) is a latent image portion serving as an element for forming the latent image (8). (10). The latent image portion (10) is formed such that the image line width is partially narrower than other portions of the second image line (6). How to form the latent image portion (10) will be described below.

  As described above, at the design stage, as shown in FIG. 12B, the second image line (6) is a single line having the same image line width as shown in FIG. The second image line (6) in this state is printed on the first image line (4) already formed on the base material (2), but the first image line (4) Since the notch (9) serving as an element for forming the latent image (8) is provided, the vertex (Q) is straddled with respect to the convex shape of the first image line (4). When the second image line (6) is printed, the colored ink for printing the second image line (6) is formed in the notch (9) where the first image line (4) does not exist. Is not printed. Accordingly, the image line width of the second image line (6) is narrower than that of other parts only in that portion, and as a result, the latent image portion (10) is formed.

As shown in FIG. 14B, when the latent image portion (10) is viewed from the first observation direction (V ₁ ) in an enlarged manner, a part of the second image line (6) becomes thin, and this portion The first image line (4) can be confirmed, and the color of the substrate (2) can be actually confirmed. However, the size (width and length will be described later) of the latent image portion (10) of the second image line (6) is such that it is difficult to see with the naked eye. Even when observed from the first observation direction (V ₁ ), it can be confirmed as a second image line group (7) in which a plurality of simple straight lines are arranged.

  The state of the second image line (6) printed on the first image line (4) is shown in FIG. 14C, which is a cross-sectional view taken along the line XX ′ of FIG. is there. As shown on the right side of FIG. 14 (c), the second image line (6) is inclined on both sides of the convex first image line (4) across the vertex (Q) (not shown). Is printed against. As shown in the figure, it is preferable that the first printed line (4) having a convex shape is evenly printed on both side slopes, but it is not necessarily printed evenly on both sides due to slight deviation during printing. Even if not, there is no problem as long as the second image line (6) is applied to the notched portion (9) and the latent image portion (10) is formed. The latent image portion (10) in FIG. 14 (b) is a cutout portion (9) where the second image line (6) is not printed when viewed in the cross-sectional view (left and center) of FIG. 14 (c). It becomes. Therefore, the latent image portion (10) and the cutout portion (9) are always formed at the same location.

In the first aspect of the latent image portion (10) described with reference to FIG. 14, the offset printing is performed when the height (H) of the convex shape serving as the first image line (4) is relatively high. When the second image line (6) is printed by the method, the ink is not completely printed on the portion removed to form the notch (9), and therefore the second image line (6 ) Is observed from the first observation direction (V ₁ ), as shown in FIG. 14B, a part of the second image line (6) becomes narrower, and the latent image portion (10). Is formed.

Next, the second embodiment will be described with reference to FIG. FIG. 15A is a diagram when the latent image forming region (3) is observed from the first observation direction (V ₁ ). In this case, the same as FIG. 14A described above. . FIG. 15B shows an enlarged view of a portion surrounded by a dotted line in FIG. 15A, but here, unlike FIG. 14B, when viewed from the first observation direction (V ₁ ). In the enlarged view, the latent image portion (10) cannot be confirmed on the second image line (6). This can be understood by looking at FIG. 15 (c). Although a part of the first image line (4) is removed and a notch (9) is formed, it is removed. This is because the second image line (6) is printed in a portion corresponding to the image line width (W ₁ ) of the same first image line (4) as the non-image area.

  FIG. 16 is a diagram for explaining this in more detail. FIG. 16 is an enlarged perspective view of only a portion corresponding to the latent image portion (10) in FIG. Since there is no notch (9) on one slope side of the first image line (4), the second image line (6) is printed as it is, but the vertex (Q) (not shown). The second image line (6) is not printed on the portion removed at an acute angle (in the drawing, Ellipse part by dotted line). Even in the same notch (9), colored ink is placed on a portion removed relatively parallel to the substrate surface, and a part of the second image line (6) is printed. For such a printing state, the type of the base material (2) is relatively elastic paper, or the height of the convex shape that becomes the first image line (4) is low, or by inkjet printing This occurs when the printing method is used. Even in such a mode, the second image line (6) with colored ink is not printed on the acute slope of the notch (9), so that the latent image (8) is the same as in the first mode. ) Can be formed.

The second image line (6) according to the second aspect is also the second image line with colored ink across the notch (9) of the acute slope where the second image line (6) is not actually printed. Since the second image line (6) is printed, it is confirmed as the second image line group (7) in which a plurality of simple straight lines are arranged when observed from the first observation direction (V ₁ ). Therefore, both the form of the second image line (6) according to the first aspect and the form of the second image line (6) according to the second aspect are from the first observation direction (V ₁ ). When observed, it can be observed as a simple straight line.

The width (z ₂ ) and length (t ₂ ) of the latent image portion (10) will be described with reference to FIG. Since the latent image portion (10) is formed at the same location as the notch portion (9) as described above, the length (t ₂ ) shown in FIG. 17A is notch portion (9). The length is always the same as the length (t ₁ ). The width (z ₂ ) is formed by using the slope of the first image line (4) as in the case of describing the image line width (W ₂ ) of the _second image line (6) with reference to FIG. Therefore, the appearance is different from that observed from the first observation direction (V ₁ ), the second observation direction (V ₂ ), or the third observation direction (V ₃ ). . Therefore, as for the width (z ₂ ) of the latent image portion (10) in the present invention, as shown in FIG. 17B, the direction in which the latent image (8) can be confirmed, the so-called second observation direction (V ₂ ) or the width (z ₂ ′) when observed from the third observation direction (V ₃ ).

When the latent image portion (10) is observed from the first observation direction (V ₁ ), the latent image portion (10) is difficult to visually recognize, and when observed from the second observation direction (V ₂ ) or the third observation direction (V ₃ ). In order to be visually recognized, the second observation direction (V ₂ ) or the third observation is determined based on the width (z ₂ ) of the latent image portion (10) observed from the first observation direction (V ₁ ). It is necessary to increase the width (z ₂ ′) of the latent image portion (10) observed from the direction (V ₃ ).

The width (z ₂ ) of the latent image portion (10) that is difficult to visually recognize when the latent image portion (10) is observed from the first observation direction (V ₁ ) is the image line of the second image line (6). 1/4 or less of the width (W ₂ ) is preferable. In addition, when observed from the first observation direction (V ₁ ), it is a plain portion (same base material color as the cutout portion) between the second image line (6) and the second image line (6). Since the notched portion (9) is also camouflaged, the width of the plain portion should be at least about half the width (z ₂ ) of the latent image portion (10).

In order to obtain the visibility when observed from the second observation method (V ₂ ) or the third observation direction (V ₃ ), the width (z ₂ ) of the latent image portion (10) is z ₂ ′> it is sufficient that a z _2, the second observation method, as shown in FIG. 17 _{(V 2)} or the third of the width of the viewing direction the latent image portion observed from _{(V 3) (10) (} z 2 ') And the first image line (4) may have the same image line width (W ₃ ), or the _second observation method (V ₂ ) or the third observation direction (V 3) as shown in FIG. The image line width (W ₃ ′) of the first image line (4) may be smaller than the width (z ₂ ′) of the latent image portion (10) observed from ₃ ).

  As with the cutout portion (9), the latent image portion (10) is formed by the first cutout portion (9a) as shown in FIG. 19 when two latent image images (8) are formed. The latent image portion (10) is the first latent image portion (10a), and the latent image portion (10) formed by the second notch portion (9b) is the second latent image portion (10b) as shown in FIG. The latent image portion (10b). Therefore, the first latent image (8a) is formed by the first latent image portion (10a), and the second latent image (8b) is formed by the second latent image portion (10b). Become.

(Latent image part placement)
When only one latent image (8) is formed, it may be formed on one of the slopes of the first image line (4) in accordance with the shape of the latent image (8) to be formed. However, when two latent image images (8) are formed, several arrangements of the latent image portion (10) are conceivable. Next, the arrangement of the latent image portion (10) will be described.

The latent image portion (10) is not particularly limited as long as it is formed on the slope of the first image line (4) in accordance with the shape of the latent image (8) to be formed. Therefore, in FIG. 20A, the first latent image portion (10a) and the second latent image portion (10b) are formed in different second image lines (6), and the two latent image images are For example, it is formed as shown in FIG. FIG. 20C shows a case where the images are formed on the same second image line (6), but formed at different locations. For example, two latent image images are shown in FIG. It is formed as shown in (d). Further, FIG. 20E shows a case where a region (k) is formed on the same second image line (6) and at least partially overlaps. Therefore, if the length (t ₂ ) of the first latent image portion (10a) and the second latent image portion (10b) is not the same but the length (t ₂ ) is the same, the entire region (k) is overlapped. Good. In this case, the two latent image images are formed, for example, as shown in FIG.

  FIG. 21 shows a cross-sectional view of the overlapping region (k), and the first notch (9a) and the second notch ( 9b), the first image line (4) has a very thin convex shape, so that it is difficult to form on the substrate (2) having a relatively low hardness such as paper. Care must be taken in forming the notch (9).

As a method of overlapping the first latent image portion (10a) and the second latent image portion (10b) without the overlapping region (k) having a thin convex shape, as shown in FIG. In the image line (6), a method of alternately forming the first latent image portion (10a) and the second latent image portion (10b), or a length (t ₃ ) as shown in FIG. A method of arranging a plurality of short latent image portions (10c) is conceivable.

(Observation principle)
As described above, by forming a concavo-convex shape on the substrate (2), the first image line group (5) in which the convex first image lines (4) are arranged in a line shape. The first latent image (8a) by the first notch (9a) and the first latent image portion (10a) on one convex slope, and the second notch ( 9b) and the second latent image portion (10b) form the second latent image (8b), and the first observation direction is observed from the three observation directions as shown in FIG. In (V ₁ ), the second image line group (7) as shown in FIG. 23C can be observed, and in the second observation direction (V ₂ ), the first latent image as shown in FIG. The image image (8a) (“A” in the figure) can be observed, and in the third observation direction (V ₃ ), the second latent image (8b) (in the figure, as shown in FIG. 23D). "B") It can be observed.

The principle by which the latent image (8) can be confirmed will be described. The second image line (6) is printed on both slopes across the convex vertex (Q) of the first image line (4). When the second image line (6) printed on both slopes across this apex (Q) is observed from the first observation direction (V ₁ ), there is no stereoscopic effect and it can be confirmed as a simple straight line. The second image line (6) has a latent image portion (10) which is an element for forming the latent image (8). As described above, the latent image portion (10) is formed. ) Has a size that is difficult to confirm with the naked eye, and is formed on the slope of the first image line (4) having a convex shape. Since the first observation direction (V ₁ ) directly above has a large angle with respect to the latent image portion (10), the latent image portion (10) itself can hardly be confirmed.

However, when observing from the observation direction in which the inclined surface on which the latent image portion (10) is formed can be confirmed, the angle between the observation direction (for example, the second observation direction (V ₂ )) and the latent image portion (10). Is almost a right angle and the latent image portion (10) can be captured (confirmed), so that a latent image (8) formed by combining a plurality of arranged latent image portions (10) can be confirmed. .

DESCRIPTION OF SYMBOLS 1 Anti-counterfeit support body 2 Base material 3 Latent image image formation area 4 1st image line 5 1st image line group 6 2nd image line 7 2nd image line group 8 Latent image image 8a 1st latent image Image 8b Second latent image 9 Cutout portion 9a First cutout portion 9b Second cutout portion 10 Latent image portion 10a First latent image portion 10b Second latent image portion V1 _First observation Direction V ₂ Second observation direction V ₃ Third observation direction H Height of first image line h Height of notch
Q vertex t ₁ , t ₂ , t ₃ Notch length z ₁ , z ₂ , z ₂ ′, z ₃ Notch width w ₁ , w ₂ , w ₃ , w ₃ ′ Width of image line

Claims (4)

A latent image forming area on at least a part of the substrate;
On the first image line, a first image line group in which a plurality of convex and straight first image lines formed on the base material itself are regularly arranged in the latent image forming region. A second image line group in which a plurality of linear second image lines formed by printing ink of a color different from the color of the base material are regularly arranged,
The first image line group includes a plurality of the first image lines including a first cutout part in which one convex slope is partially omitted,
The second image line group is disposed so as to straddle both slopes in the convex shape of the first image line, and the printing ink is not applied at the same position as the first notch portion. A plurality of the second image lines having a first latent image portion;
A first latent image is formed by a plurality of the first cutout portions and the first latent image portions that are arranged,
The second image line group can be confirmed by observing from the first observation direction which is perpendicular to the base material surface, and the first notch portion and the first latent image portion are arranged. The forgery-preventing carrier is characterized in that the first latent image can be confirmed by observing the inclined surface of the substrate from a second observation direction oblique to the substrate.
The first image line group includes a second cutout part in which a part of the convex shape is missing on the other slope opposite to the one slope where the first cutout part is formed. A plurality of the first image lines,
The second image line group includes a plurality of the second image lines including a second latent image portion to which the printing ink is not applied at the same position as the second notch portion,
A second latent image is formed by a plurality of the second notch portions and the second latent image portion that are arranged,
The second latent image is obtained by observing the other inclined surface on which the second cutout portion and the second latent image portion are arranged from a third observation direction oblique to the base material. The anti-counterfeit carrier according to claim 1, further comprising: The first image line group includes the first image line in which the first notch part and the second notch part are formed in the same or different image lines. The anti-counterfeit carrier according to claim 2. When the first notch and the second notch are formed in the same first image line, the first notch and the second notch are at least partially The anti-counterfeit carrier according to claim 3, wherein is formed at overlapping positions.

Images