JP3388552B2 - Printed materials that are difficult to duplicate - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printed matter on which micro characters are printed which can prevent misuse such as forgery by copying.

[0002]

2. Description of the Related Art Various kinds of printed matter such as securities have been copied due to the technical progress of a color copying machine which performs optical copying, and a problem has arisen against illegal use of these duplicates. As a means for solving this problem, there is known a printed matter on which micro-characters having a size about the copying limit of a copying machine are printed.

FIG. 5A shows a schematic external view of a conventional printed matter on which micro characters of the same size are printed. Figure 5
As shown in (A), it is visually recognized that a rectangular frame 72 is printed on the printed matter 70. When a part 76 of the frame 72 is enlarged, micro characters 76 of the same size "DAINIPPON" are continuously printed in the horizontal direction. Since the micro characters 76 are continuously printed in a rectangular shape, they are recognized as the frame 72 when viewed.

The micro character 74 is, for example, a character which cannot be visually recognized as a character at first glance but can be recognized as a character when viewed closely, or a character which is so small that it cannot be visually recognized. The size of the characters is such that they cannot be copied as accurate characters when copied with.

The printed material 7 shown in FIG. 5A is shown in FIG.
Figure 2 shows a schematic external view of the 0 replication 70a. As shown in FIG. 5B, a frame 72a is visually recognized in the duplicate 70a as in the printed matter 70. However, as shown in an enlarged view of a part 76a of the frame 72a, the micro character 74 is copied as an accurate character. Instead, it is copied onto the solid 74a. Therefore, it is possible to identify whether or not the printed matter is a duplicate by examining the portion of the printed matter on which the micro characters are printed. In the conventional copy, micro characters of the same size are printed according to the copy limit of the copying machine.

[0006]

However, as the copying performance of the copying machine is improved, it is necessary to further reduce the size of the micro characters 74 for printing. The miniaturization of the micro characters 74 requires advanced printing technology, which leads to an increase in printing cost of the micro characters 74.

Further, in the conventional printed matter 70 on which the micro characters 74 are printed, the thickness of the printed micro characters 74 is the same. Therefore, when the micro characters 74 react with the copying machine, for example, a uniform shade of solid is produced. 74a.
Therefore, especially when the micro characters 74 of the printed matter 70 are so small (small) that they cannot be recognized by the naked eye, the copy 7
It cannot be visually recognized that the portion of the micro character 74 of 0a is a solid 74a, and it cannot be easily identified as a duplicate.

Further, when a pattern using the micro characters 74 is printed on the printed matter 70, various patterns cannot be printed because the micro characters 74 have the same thickness.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a printed matter which can be easily identified as a copy when copied by a copying machine.

Another object of the present invention is to prevent fraud,
Moreover, it is to provide a printed matter that can be printed at low cost using a simple printing technique.

Another object of the present invention is to provide a printed matter on which various patterns using micro characters are printed.

[0012]

In order to solve the above-mentioned problems and to achieve the above-mentioned objects, the printed matter of the present invention has a plurality of sizes which are not optically copied at a predetermined line thickness. Is a printed matter in which the line widths of the non-copyable lines are different and the line thicknesses are different, and the pattern, the figure, the character can be visually observed by combining the micro characters having different line thicknesses. , A part recognized as a background, etc. is included.

Further, in the printed matter of the present invention, the pattern is visually recognized as a light and shade pattern.

[0014]

[0015]

[0016]

EXAMPLE A first example will be described. Figure 1 (A)
A schematic external view of the printed matter 1 by visual observation is shown in FIG. Figure 1 (A)
As you can see, the printed matter 1 has a rectangular line pattern 2
Appear to be formed. When a part of the horizontal line 2a of the line pattern 2 is enlarged, as shown in FIG.
Micro characters 4A to 4L "INIPON" are continuously printed in the horizontal direction.

FIG. 2 shows a diagram for explaining the micro characters 4A to 4L. As shown in FIG. 2, micro characters 4A
Characters 4L to 4L have the same color and the same size, but have different thicknesses. The sizes of the micro characters 4A to 4L are determined, for example, on the basis of the copy limit according to the resolution of the color copying machine that optically copies. For example, if the resolution of a color copying machine is 400 DPI (Dot Per Inch), micro characters of 250 microns cannot be accurately copied by this copying machine. Therefore, the micro characters 4A to 4L have a size of about 250 microns. The printed matter 1 is printed.

As shown in FIG. 2, micro characters 4A-4
The thickness of L is thickest in the micro character 4A, and becomes thinner toward the micro character 4L. The resolution of color copiers also depends on the thickness of micro characters, and the smaller the thickness of micro characters, the less likely it is to copy. For example, the size shown in FIG.
The resolution is 40 for micro characters 4A to 4L of 50 microns.
When copying with a 0 DPI color copying machine, for example, the thick micro characters 4A to 4L are copied in a solid shape in which the micro characters are crushed, and the thin micro characters 4G to 4L are not copied at all. Or, it is copied in a solid pattern with micro characters crushed.

Further, the thicker the printed matter 1, the thicker the micro-characters 4A to 4L are printed, the darker the printed matter is, and the thinner the printed micro-characters 4A to 4L is, the lighter the printed area is. For example, in the portions 2a and 2e of the line pattern 2 shown in FIG.
Since the line pattern 2 is continuously printed in the horizontal direction, the line pattern 2 looks lighter toward the right.

In the portion 2b located on the right side of the portion 2a,
For example, the micro character 4L is printed and the line pattern 2
Looks pale. Also, the portion 2 located on the right side of the portion 2b
Contrary to the portion 2a, the character c is printed from the micro character 4L to the micro character 4A in order, and the line pattern 2 looks darker toward the right. Further, for example, the micro character 4A is printed on the portion 2d located on the right side of the portion 2c, and the line pattern 2 looks dark. And line pattern 2
Along the line, the micro characters 4A to 4L are printed in the same arrangement as the above-described portions 2a to 2d.

The copying 6 of the printed matter 1 by the copying machine will be described. FIG. 1B shows a schematic external view of the copy 6 of the printed matter 1 by the copying machine. The line pattern 8 of the copy 6 is, for example, as shown in FIG. 1B, the portions 8a, 8c and 8e corresponding to the portions 2a, 2c and 2e of the line pattern 2 of the printed matter 1 shown in FIG. A part and a part 8b corresponding to the part 2b are not copied at all and serve as a base, for example.

The line pattern 8 of the copy 6 corresponds to the resolution of the copying machine. In the copy 6 shown in FIG. 1B, the micro characters 4A to 4A printed on the printed matter 1 by the copying machine.
F is copied and the micro characters 4G-4L are, for example,
Not copied at all.

In the copy 6 of the printed matter 1, the lower the copying performance of the copying machine for copying, the smaller the copied microcharacters 4A to 4L of the line pattern 2 of the printed matter 1 to 4L.
The number of 4L increases. For this reason, the line pattern 8 of the duplicate 6 copied by a copying machine having a low copying performance has a longer base portion (a portion which is not copied at all), and the difference between the line pattern 2 of the printed matter 1 and the line pattern 8 of the duplicate 6. Makes it easier to identify.

As described above, in the printed matter 1 of this embodiment, unlike the conventional printed matter 70, the micro characters 4A to 4A having different thicknesses are used.
Since the line pattern 2 is printed by using 4L, the line pattern 8 of the copy 6 is different from the line pattern 2 of the printed matter 1, and the copy 6 can be easily identified, and the copy 6 can be prevented from being forged.

Further, by printing micro characters having a small thickness on the printed matter 1, it is possible to cope with the improvement of the copying technique, and prevent an increase in cost caused by the miniaturization of the micro characters, which is difficult to technically develop. be able to. Further, since the micro characters 4A to 4L have the same size, the printing of the micro characters 4A to 4L can be simplified.

The second embodiment will be described. FIG. 3 shows a diagram for explaining the printed matter 12. As shown in FIG. 3, the printed matter 12 has areas 10A to 10L at equal intervals.

A plurality of micro characters 4A to 4L of the same color shown in FIG. 3 are printed in the areas 10A to 10L, respectively. Therefore, among the areas 10A to 10L, a darker and lighter pattern in which the area closer to the area 10A on which the thick micro character 4A is printed is visually recognized in a darker color, and the area closer to the area 10L on which the thick micro character 4L is printed is viewed in a lighter color. It has become.

When the printed matter 12 is copied by a copying machine, the area 10 is wider from the area 10A to the area 10L as the copying is performed by the color copying machine having higher copying performance.
A to 10L are copied. Therefore, the patterns (patterns) of the areas 10A to 10L are different between the printed matter 12 and the duplicate, and the duplicate can be easily identified from the difference in these patterns.

The third embodiment will be described. Figure 4
FIG. 4A is a diagram for explaining the printed matter 20, and FIG. 4B is an enlarged view of a portion 22a of the printed matter 20 shown in FIG. 4A. As shown in FIG. 4A, a background pattern 2 using a plurality of micro characters of the same color on the entire surface of the printed matter 20.
2 is formed.

The background pattern 22 includes micro characters 4A and 4A.
Printed using G, 4L, for example, micro character 4
A, 4G, and 4L are combined and printed in the arrangement as shown in FIG. This printed matter 20, for example,
When the resolution of the color copying machine is the micro character 4L, the micro characters 4A and 4G are copied, but the micro character 4L is not copied, and the copy of the printed matter 20 has a background pattern different from that of the printed matter 20. . Therefore, the printed matter 12 and the copy can be easily identified from the difference in the background pattern.

The invention is not limited to the embodiments described above. There are various patterns such as patterns, figures, characters, and backgrounds printed on the printed matter 1, 12, 20 by using the micro characters 4A to 4L. For example, a pattern in which a figure, a character, or the like is not visually recognized due to the combination of the micro characters 4A to 4L, but a figure, a character, or the like that is visually recognized when copied may be used.

In the above embodiment, the micro character 4
The case where A to 4L have the same size has been described, but the sizes of the micro characters 4A to 4L may not be the same. The resolution level of a micro-character copy machine, for example, is
It is inversely proportional to the area ratio of micro characters formed within a range having a predetermined area. For example, when the area ratio of micro characters formed within a range having a predetermined area is small,
The resolution level of the micro character by the copier etc. is high,
A copying machine having a high resolution level is required to copy these micro characters. That is, in the above-described embodiment, the area ratio of the micro characters is changed by changing the thickness without changing the size of the micro characters 4A to 4L.
By changing the size of 4L to 4L and changing the area ratio, the resolution level of the micro characters 4A to 4L by a copying machine or the like may be changed.

Further, in the above-described embodiment, the case where the micro characters 4A to 4L of the same color are printed has been described, but the printed characters 1, 12 and 20 have the micro characters 4A of different colors.
~ 4L may be printed.

Further, in the above-mentioned embodiment, the case of printing twelve types of micro characters 4A to 4L having different thicknesses has been described, but the number of types of thickness may be any.

In the above embodiment, the micro character 4
Although the case where the thicknesses of A to 4L are sequentially changed step by step has been described, the change in thickness may not be stepwise.

Further, the size and thickness of the micro character are determined by the type (importance) of the printed matter on which the micro character is printed.
Some may not necessarily include what is not copied by the highest performance copier.

Since the resolution of the copying machine depends on the size, thickness, color, etc. of the micro character, the range of the thickness of the micro character printed on the printed matter is determined by the size, color, etc. of the micro character. .

Further, in the above-mentioned embodiment, the copying by the copying machine is explained as an example of the optical copying, but the present invention also provides a copying check pattern even in copying by the xerographic method, photoengraving, electronic engraving and camera photographing. It is valid.

[0039]

According to the printed matter of the present invention, it is possible to easily identify a copy by a copying machine. Also,
According to the printed matter of the present invention, it is possible to prevent an increase in printing cost that accompanies the reduction of micro characters due to the high performance of the copying machine. Further, it is possible to print various patterns, figures, characters, backgrounds and the like using micro characters having different thicknesses on the printed matter. Furthermore, the printing technique can be simplified because the same size of micro characters are printed.

[Brief description of drawings]

FIG. 1 (A) is a schematic external view of a printed material on which micro characters of the first embodiment are printed, when viewed.
FIG. 1B is a schematic external view of a copy of the printed matter of FIG.

FIG. 2 is a diagram for explaining the thickness of micro characters.

FIG. 3 is a diagram for explaining a printed matter on which micro characters of the second embodiment are printed.

FIG. 4 (A) is a diagram for explaining a printed matter on which micro characters of the third embodiment are printed, and FIG. 4 (B) is FIG.
It is the figure which expanded a part of (A).

5 (A) is a schematic external view of a printed matter on which a conventional micro-character is printed, and FIG. 5 (B) is FIG.
It is a schematic external view of the copy of the printed matter of (A).

[Explanation of symbols]

1, 12, 20, 70 ... Printed matter 2,8,72a ... Line pattern 6, 70a ... Duplicate 4A-4L, 74 ... Micro characters 10A-10L ... area

Front page continuation (58) Fields surveyed (Int.Cl. ⁷ , DB name) B42D 5/00-15/10 B41M 3/14

Claims (2)

(57) [Claims] 1. A printed matter in which a plurality of micro characters having a size that is not optically copied at a predetermined line thickness are printed with different line thicknesses including non-copyable line thicknesses, A printed matter including a portion visually recognized as a pattern, a figure, a character, a background, etc. by a combination of the micro characters having different line thicknesses. 2. The printed matter according to claim 1, wherein the pattern is visually recognized as a light and shade pattern.