JP3529084B2 - Intaglio latent image and method for producing the latent image - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides an intaglio printed matter in which a set of curved lines and straight lines is provided with a latent image which cannot be generally discerned by the naked eye, and which requires anti-counterfeiting and alteration. The present invention relates to a latent image intaglio to be observed and a method for producing an image line characterized by a copy prevention effect in which a latent image is developed when copied by a copying machine, and a printed matter thereof.

[0002]

2. Description of the Related Art In the case of banknotes, stamps and securities, intaglio printing is an important element for preventing counterfeiting and alteration.
Countermeasures against forgery and alteration of these printed materials are mainly the method of using designs with diversified geometric patterns in the design, and if some means and action are applied to the printed materials, latent images that could not be visually confirmed will appear. There are various methods. Typical examples of the former are a tint block pattern, a color pattern, and a relief pattern, which are widely used in the design of printed matters such as securities. The latter representative example is a latent image intaglio, and colors are normally reproduced by a copying machine. There are functional inks and copy protection lines that are not protected. However, with the recent widespread use of color copying machines and the like, there is a risk that crimes due to forgery and alteration will increase, and there has been a demand for the development of a more effective technique for preventing forgery and alteration.

Countermeasures against forgery and alteration using the above-mentioned geometric pattern include a tint block, a color pattern, and a relief pattern.
Basically, a pattern is composed of a set of curved strokes having a constant stroke width. These patterns take into account the design characteristics of printing, and can be counterfeited or counterfeited, making it difficult to create the same pattern in a forged product by complicating the pattern. The role of anti-counterfeiting measures is enhanced by using colors that are difficult to reproduce in an extraction or copying machine, or by creating complicated curved lines to generate moire for scanning input / output of the copying machine and scanner. Further, the patterns are widely used in the world for designing printed matters such as securities, and at the same time, they have been used for a long time as patterns of printed matters having a monetary value such as banknotes, stock certificates, bonds, etc. It is an important pattern as a design that impresses, and when printing securities such as banknotes, stock certificates, bonds, etc., a tint block, a color pattern, a relief pattern, etc. are indispensable in terms of design. However, recently, with the advent of highly functional plate-making photographic devices or copying machines, there is a drawback in that they do not provide sufficient forgery and alteration prevention effects.

Further, there is a latent image intaglio as a technique of a method for producing a latent image which cannot be visually confirmed by applying some means and action to the printed matter. As a typical example, there is Japanese Patent Publication No. 56-19273, and the present invention has a structure in which an image area which becomes a latent image is composed of a high image line on an intaglio printed line, and a non-image line of other intaglio image lines. The part is composed of a drawing line lower than the drawing line part. As a result, when the printed matter is tilted, the image area is faster than the non-image area, and the line spacing is closed depending on the height of the image area, so that a latent image is developed.
However, with this method, a latent image does not appear from the line direction,
It appears only in the direction perpendicular to the line. Also, since the latent image appears only due to the difference in height between the image area and the non-image area,
The angle at which the latent image can be seen is limited, and the latent image cannot be easily confirmed. In addition, there is a case in which a latent image is developed due to a uniform width of an image line and a different orientation. However, this method has a drawback that the place where the latent image is formed can be easily confirmed visually.

Further, Japanese Patent Laid-Open No. 60-155492 discloses that a forgery-preventing drawing line is composed of a group of many squares or rectangles of parallel straight lines having two different heights and adjacent to each other. Each group is an anti-counterfeit pattern having at least two or more hidden images, which are alternately composed of two prescribed lines of different directions. In this method, the drawing direction is changed for each group, and there is a height difference between the drawing lines forming the hidden image and the drawing lines forming the background, but only the height is changed without changing the drawing line width. Is very labor intensive. Further, the difference in the drawing direction can be easily confirmed with the naked eye. Further, when viewed from a certain direction and angle, two or more hidden images are overlapped with each other, which makes it very difficult to see.

Further, as a method of developing a latent image which cannot be visually confirmed by applying some means, method and action to the above-mentioned printed matter, there is a series of techniques called copy prevention image lines. A typical one of these is the special table, 8-30
There is a publication of 00800. This copy-prevention drawing line is used for a curved aggregate pattern of offset printing. Also,
It is intended to prevent counterfeiting and alteration by copy prevention by using a printed matter and a method of making the same, in which the area ratio of the image area and the area ratio of the non-image area are the same and a latent image that is usually invisible to the naked eye is applied. . However, this method constructs a copy-protected image with a two-dimensional drawing line, and the principle can be understood by enlarging this drawing line, so it is easy to imitate a malicious forgery / alteration person. There are difficulties that can be done.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned points, and a curvilinear shape formed by a three-dimensional drawing line is formed on an intaglio printed matter such as banknotes / stamps and securities. Characterized by changing the area ratio of the drawing part and the non-drawing part according to the conditions in the set pattern and the set pattern of straight lines.
Camouflage is not required by changing the height, width and length of the image between the non-image area and the image area, and a latent image that cannot be visually confirmed is applied. Along with the function to prevent it, the latent image can be confirmed from all directions when the printed matter is viewed from a certain angle.The latent image is white when viewed from above and below the line, and the black latent image when viewed from the left and right. The object of the present invention is to provide an intaglio printing line having the functions of improving the added value of the product, clarifying the intension, and preventing higher-level forgery and alteration due to the appearance of an image.

[0008]

A method for forming an intaglio latent image according to the present invention is a method of forming a latent image by forming a set pattern of curved lines and straight lines, and forming lines of a portion not to be latent image by continuous lines. The image line of the part is formed by a periodic break line consisting of a predetermined shape arranged at a constant interval in the basic straight line direction, and among the periodic break lines of the latent imaged part, continuous in the basic straight line direction. The drawing area of a part corresponding to one cycle consisting of one drawing part and a non-drawing part has the same length as the one cycle in the basic straight line direction among the continuous lines of the part where the latent image is not applied. The corresponding drawing area is different.

Further, in the method for producing an intaglio latent image of the present invention, in the intaglio latent image, the heights and widths of the image lines of the non-image area and the image area are different.

Further, in the intaglio latent image of the present invention, the boundary line between the image line of the part where the latent image of the straight line of the intaglio printing image line is not applied and the image line of the image line of the part where the latent image is applied is basically At the intersection of the straight line and the contour line of the latent image, it becomes a straight line that intersects the basic straight line at a right angle, and at the same time, the boundary line between the image part and the non-image part on the fixed period break line is the basic straight line and the fixed period break. It becomes a straight line that intersects the basic straight line at a right angle at the intersection of the drawing line on the line and the boundary line of the non-drawing part.

Further, in the intaglio latent image of the present invention, the boundary line between the image line of the part where the latent image is not applied and the image line of the part where the latent image is applied is defined in the collective pattern of the curved lines of the intaglio printing image line. The contour line of the latent image is in the same direction, and the boundary line between the imaged portion and the non-imaged portion on the periodic break line is unidirectional, regardless of the basic curve.

Further, the intaglio latent image of the present invention has a copy protection pattern.

Further, it is an intaglio printed material having the intaglio latent image of the present invention.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION According to the intaglio image line shape of the present invention, the image line of the portion without the latent image is a continuous line, and the image line of the portion with the latent image is formed by a constant periodic break line, Of the periodic break line of the part subjected to, the drawing area of the part corresponding to one cycle consisting of one drawing part and non-drawing part continuous in the basic straight line direction,
Of the continuous lines of the portion not subjected to the latent image, the area of the drawing line of the part corresponding to the same length as the one cycle in the basic straight line direction is different, and the height and the drawing width of the drawing line are also different. In the normal state, the latent image cannot be visually identified.

Furthermore, when a printed matter having the image line structure of the present invention is copied by a copying machine, the continuous line of the portion not subjected to the latent image is reproduced as it is because of the resolving power of the copying machine, and the fixed portion of the latent image is fixed. Since the periodic break line is not reproduced, when the copy is observed with the naked eye, a density difference occurs between a portion without a latent image and a portion with a latent image, and a latent image is developed.

Further, when the printed matter having the image line constitution of the present invention is viewed from a certain angle, the image line of the portion where the latent image is not applied is
The image spacing is closed by the height of the image, so it looks black overall, and the part with a latent image is a straight line that is perpendicular to the image of the part without a latent image. Is only the image line width, and the entire printing paper looks white in a floating form, so that a density difference occurs between the image line in the part where the latent image is not applied and the part where the latent image is applied, and the intaglio latent image appears.

As described above, in the intaglio image line where the latent image cannot be visually confirmed at all, the function of preventing forgery and alteration by the copying machine is added, and the latent image intaglio image is observed only from a specific angle of the printed matter. It is possible to improve the added value of the product, clarify the intent, and further strengthen the resistance to forgery and alteration.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawing construction of an anti-counterfeiting drawing according to the present invention will be described with reference to the drawings. As shown in FIG. 1, the intaglio printing line according to the drawing line construction of the present invention is a continuous line as shown in (1) and (3) in which a latent image is not formed, and a drawing line in which a latent image is formed. Is composed of a fixed period break line as shown in (2) and (4). From this figure, the boundary line (7) on the line between the image line of the latent image-free part and the image line of the latent image-formed part is the basic line K at the intersection of the basic line K and the outline of the latent image. It can be seen that the line intersects the line at a right angle.

FIG. 3 is an enlarged view of a boundary line between an image line of a portion without a latent image and an image line of a portion with a latent image in order to show the image line structure of the present invention in more detail. A is the drawing width in the direction perpendicular to the basic straight line K of the continuous line in the part where the latent image is not applied, and the length of the drawing line in the basic straight line direction of the drawing part of the periodic break line in the part where the latent image is applied Let B and C be the lengths of the drawing lines in the direction perpendicular to the basic straight line of the periodic break line of the latent imaged part, and let D and G be 1/2 the length of each drawing line. Assuming that the lengths of the image lines rotated by 90 degrees about the intersection point M intersecting the center line of the basic straight line of each of the periodic break lines of the latent imaged portion are E and F, D = E and G = It becomes F. In this figure, the length of the image line obtained by rotating the length L of the image line of the latent image portion at a right angle in the direction of 90 degrees and the image corresponding to one period of the image portion of the latent image are shown. Line length O
And is equal to the length P of the image line corresponding to one cycle of the portion where the latent image is not applied.

According to the present invention, among the constant-period break lines of the portion on which the latent image is formed, the image area Q of a portion corresponding to one period consisting of one image portion and a non-image portion which are continuous in the basic straight line direction. And an intaglio printing line characterized by a difference in the drawing line area R corresponding to the same length as the one cycle among the continuous lines of the non-latent image. The drawing line width A in the direction perpendicular to the basic straight line of the continuous line and the drawing line widths B and C in the basic straight line direction of the periodic break line of the portion on which the latent image is formed are different. However, the drawing line widths B and C of the constant-period break lines in the portion where the latent image is formed are equal. From this, the drawing interval of the fixed period break line is E + FB (or C).

Example 1 will be described with reference to FIGS. 3 and 4. The latent image represents the letter H with a constant break line. The size of this alphabet H is 15mm
Is. In addition, a straight line interval N which is the basic straight line direction of the periodic break line of the portion where the latent image is not applied and the portion where the latent image is applied are
Was 330 μm.

The continuous line of the portion where the latent image is not applied has a height of 20 μm.
m, and the line width A was 40 μm. Further, the length of the image line L in the direction perpendicular to the basic straight line of the image line portion of the periodic break line of the portion on which the latent image is formed is set to about 140 μm. Further, the drawing line widths B and C in the basic straight line direction of the drawing line portion of the periodic break line of the portion on which the latent image is applied are set to 38 μm to 30 μm, and the drawing line height is set to 1
It was set to 9 μm to 15 μm. Therefore, from the above formula, the image-line spacing I of the latent imaged portion is from 102 μm to 110 μm. This represents the relationship between the constant area ratio formed by the constant-period break lines in the latent imaged part and the constant area ratio in the continuous line in the non-latent imaged part. The area ratio formed by the periodic break lines of the latent image-provided area is 9
It will be 5% to 75%.

When the printed matter obtained in this example was visually observed, the latent image could not be visually observed. Also,
A copy obtained by copying this printed matter with a color copier is formed by the constant-period disconnection line because the continuous line of the part without the latent image is reproduced as it is and the constant-cycle disconnection line of the part with the latent image is not reproduced. It was possible to discriminate at a glance that the letter H appeared and was a copy. Furthermore, when the printed matter is viewed from a certain angle, the image lines of the part without the latent image appear closed and black due to the height of the image line, and the part with the latent image becomes the image line of the part without the latent image. On the other hand, the development of the intaglio latent image of the letter H formed by the periodic break lines was obtained from the configuration of the drawing lines which appeared to be a right-angled straight line.

From the above, the constant image area ratio of the continuous lines of the portion without the latent image and the constant period interruption of the portion with the latent image, which form the curved lines and straight lines of the present invention. It is different from the fixed area ratio composed of lines, and by utilizing the difference in the drawing area ratio in this way, it is impossible to visually recognize the latent image with the ordinary naked eye without using camouflage etc. .

(Embodiment 2) FIG. 2 shows an image line (5) of a portion where a latent image is not applied in a set pattern of curved image lines of intaglio image lines.
And the boundary line (7) of the image line (6) of the latent image is set in the same direction as the contour line of the latent image, and the boundary line between the image part and the non-image part on the fixed period break line is basically It represents a latent image line that is unidirectional regardless of the curve. On the basis of this drawing line, the drawing line width of the continuous line of the part where the latent image is not applied is set to 40 μm under the same conditions as in the first embodiment, and the drawing line width of the line where the latent image is applied is cut off. Was 38 μm to 30 μm, the height of the image line was 20 μm in the part without the latent image, and the image line in the part with the latent image was 19 μm to 15 μm. Therefore, from the above equation, the line spacing of the break lines in the latent image formed area is 102 to 110, and the area ratio of the latent image formed area to the image line of the non-latent image area is 95% to 75%. Become.

Also in this embodiment, when the printed matter was visually observed, the latent image could not be visually recognized. Also,
In the case of a copy made by a color copying machine, the continuous line of the part without the latent image is reproduced as it is, the disconnection line of the part with the latent image becomes unreproducible, and the letter H formed by the disconnection line appears and the copy is reproduced. It was possible to distinguish it at a glance.
Furthermore, when the printed matter was viewed from a certain angle, an intaglio latent image was developed.

[0027]

As described above, according to the present invention, a constant image area ratio of continuous lines in a portion where a latent image is not applied and a constant area ratio formed by constant periodic break lines in a portion where a latent image is applied are set. In contrast, the latent image is completely invisible to the naked eye by utilizing the difference in image area ratio.

Further, when an intaglio printed matter having the streak structure of the present invention is copied by a copying machine, a continuous line of a portion not subjected to a latent image is reproduced as it is, and a fixed period break line of a portion subjected to a latent image is reproduced. Therefore, when the copy is observed with the naked eye, a density difference occurs between a portion without a latent image and a portion with a latent image, and a latent image appears. Resolution by copier is usually 40
Although it is 0 dpi (64 μm for one pixel), it can be easily applied to a copying machine having a higher resolution by changing the height, width and length of the image line.

Further, when the intaglio printed matter having the image line construction of the present invention is viewed from a certain angle, the image lines of the portion where the latent image is not applied are entirely closed because the image line intervals are closed by the height of the image lines. Since the image lines that appear black and the latent image area looks like a straight line at right angles to the image area where the latent image is not applied, the entire printing paper appears white as the printing paper floats up.
A density difference occurs and an intaglio latent image appears.

From the above effects, in intaglio printed matters such as banknotes, stamps and securities, as a technique for improving the added value of the product and clarifying the intension and preventing forgery and alteration, the effect is further enhanced. Can be given.

[Brief description of drawings]

FIG. 1 is a diagram showing a line drawing structure of a portion with a latent image and a portion without a latent image in a straight line and a curved line.

[FIG. 2] In the curve line, the boundary line between the part where the latent image is not applied and the part where the latent image is applied are in the same direction as the contour line of the latent image. The boundary of the line part,
The figure which showed the case where it was unidirectional regardless of the basic curve.

FIG. 3 is an enlarged view of a boundary portion between image lines of a latent imaged portion and a latent imageless portion.

FIG. 4 is a diagram in which H is expressed by a constant period break line.

[Explanation of symbols]

1, 3, 5 Continuous line of the part without the latent image 2, 4, 6 Regular break line 7 of the part with the latent image 7 Image line of the part without the latent image and image line of the part with the latent image Border line A on the image line A The image width of the continuous line of the part where the latent image is not applied B The image of the regular break line of the part where the latent image is applied C The image of the constant break line of the part where the latent image is applied Line width D 1/2 of the length of the line of the fixed period break line ED rotated on the basic straight line F G rotated on the basic line G Length of the fixed line break line 1/2 H Image width of constant-period disconnection line I Image interval of constant-period disconnection line J Image width of constant-period disconnection line K Centerline of constant straight line of non-latent image Line length of the break line M Intersection point between the constant break line and the center line of the basic straight line N Line spacing between straight lines O The continuous break line of the part of the latent image that is continuous in the basic straight line direction did A length P of an image line corresponding to one cycle consisting of one image area and a non-image area. Among the continuous lines of the portion not subjected to the latent image, the same length Q latent image as the one cycle O in the basic straight line direction. Drawing area R of the length O of one cycle of the part to which the image is applied Drawing area of the length P of one cycle of the part to which the latent image is not applied

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-8-300800 (JP, A) JP-A-60-155492 (JP, A) JP-A-56-19273 (JP, A) JP-A-2- 305686 (JP, A) JP-A-9-136479 (JP, A) JP-A-8-169193 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B41M 3/14 B42D 15 / 10 G03G 21/04

Claims (8)

(57) [Claims] 1. A set pattern of curved lines and straight lines of an intaglio printing image line, a line image of a portion without a latent image is a continuous line, and a line image of a portion with a latent image is fixed in a basic straight line direction. It is composed of a fixed period break line composed of a predetermined shape of the cut line, and among the fixed period break lines of the latent imaged portion, one drawing line portion which is continuous in the basic straight line direction and a non-drawing line. streak area of a portion corresponding to one period consisting of the line section, of the portion of the continuous line is not subjected to the latent image, the image line area of a portion corresponding to the same with the one period of the basic linear direction length 95% against
From 75% to 75% . 2. A continuous line of the portion where the latent image is not applied,
2. The method for producing an intaglio latent image according to claim 1, wherein the height and width of the image line of the periodic break line of the portion on which the latent image is formed are different. 3. In the set pattern of straight lines, a boundary line between an image line of a portion without a latent image and an image line of a portion with a latent image is a basic line and a contour line of the latent image. At the intersection point of , the straight line intersects the basic straight line at a right angle, and the boundary line between the drawing part and the non-drawing part on the constant break line is also the basic line and the drawing line and non-drawing line on the constant break line. Intersection with part boundary
In, how to create the intaglio latent image according to claim 1 or 2, characterized in that a straight line intersecting at right angles with respect to the basic straight line. 4. In the set pattern of curved lines, a boundary line between an image line of a portion not subjected to a latent image and an image line of a portion to which a latent image is applied is set in the same direction as a contour line of the latent image, and a constant period is set. The intaglio latent image according to claim 1 or 2, wherein a boundary line between the drawing portion and the non-drawing portion on the disconnection line is in one direction regardless of the basic curve.
How to create. Set pattern wherein the intaglio printing streak Kyokuga lines and straight line screen is a line drawing of a portion not subjected to latent image in a continuous line, a fixed line drawing of a portion subjected to latent image base linear direction It is composed of a fixed cycle interruption line consisting of streaking of predetermined shape which are arranged at intervals
Is, among the periodic break line portion subjected to the latent image, the image line area of a portion corresponding to one period consisting of one image area and the non-image area which is continuous to the basic straight line direction, the latent image 95% of the drawing area of the part of the continuous line of the non-exposed part corresponding to the same length as the one cycle in the basic straight line direction
From printing the intaglio latent image, which is a 75%
Printed matter. 6. A continuous line of the portion where the latent image is not applied, and
The line height and the image of the periodic break line of the latent image
The intaglio latent image according to claim 5, wherein the line widths are different.
The printed matter which printed. 7. A latent image in the set pattern of straight lines
The drawing lines of the part without the image and the line with the latent image
The upper boundary is the intersection of the basic straight line and the latent image outline,
A straight line that intersects the basic straight line at a right angle.
The boundary line between the drawing area and the non-drawing area on the periodic break line is the basic straight line
And the intersection of the drawing line on the periodic break line and the boundary line of the non-drawing part
Then, make sure that it becomes a straight line that intersects the basic straight line at a right angle.
A stamp printed with the intaglio latent image according to claim 5 or 6,
Printed matter. 8. A latent image in the collective pattern of the curved lines
The boundary line between the part that is not applied and the part that is applied with the latent image
In the same direction as the contour line of the latent image, and
The boundary line between the line part and the non-image part is unidirectional regardless of the basic curve
The intaglio latent image according to claim 5 or 6, wherein
The printed matter which printed.