JP3177357U - Printed matter with copy protection pattern - Google Patents

Abstract

The present invention provides a printed matter having a copy-preventing pattern capable of reliably developing a latent image displaying characters and figures.
In a printed matter having a copy-preventing pattern in which a latent image 3 having characters and figures formed by a fine component printing unit 2 is printed on the surface of a base paper 1, the fine component printing unit 2 takes a square form. And the shape which cuts off a corner part is made. Further, the micro component printing unit 2 includes a chamfered portion 6 with a corner portion cut away by chamfering of 45 degrees, a linear portion 7 connecting the adjacent chamfered portions 6 and 6, and the chamfered portion 6 and the linear portion. And an obtuse angle part 8 provided between the two.
[Selection] Figure 1

Description

  The present invention relates to a printed matter that needs to be prevented from forgery and alteration, and has a copy prevention pattern that causes a latent image to appear when copied by a copying machine.

  The resident certificate, certificate, prescription, etc. contain latent images (warning characters) that were difficult to see with the naked eye, such as “copying”, “invalid”, “duplication”, etc. There are many cases where copy prevention technology is applied to the side of the copy to prevent counterfeiting.

  In general, a printed material is composed of a collection of minute points called halftone dots, which are difficult to recognize with the naked eye, and reproduces the shading of a pattern by increasing or decreasing the diameter of each point. And it becomes possible to show said forgery prevention effect by controlling the diameter and space | interval of the said halftone dot.

  Specifically, a halftone dot having a diameter that can be copied at the input / output resolution of a general copying machine is used as a latent image, and a network having a diameter that is difficult to reproduce by a copying machine other than the latent image is used. Print data using dots is used. The halftone dots that are difficult to reproduce are those in which the input / output resolution of the copying machine is insufficient or the color is skipped due to correction of the gamma characteristic of the copying machine.

  However, there is a drawback that the latent image is already clearly visible in the original state because the difference in the dot diameter between the latent image and the others is large as it is, and the latent image is printed darkly.

  Therefore, by increasing the interval between the halftone dots constituting the latent image, the darkness of the appearance is reduced, and adjustment is made so that it is difficult to determine the portion other than the latent image, thereby providing a printed matter having a copy prevention effect. Can be obtained (for example, Patent Document 1). The characteristic that makes it difficult to see the latent image in the original state is hereinafter referred to as “camouflage effect”.

  The anti-copying technology disclosed in Patent Document 1 requires a certain print density other than the latent image, so that the latent image when copying is likely to be inferior in recent copying machines. Further, there is a problem that portions other than the latent image are slightly tinted and the latent image is not clearly expressed.

  In order to solve such a problem, in a printed matter having a copy-preventing pattern in which a latent image displaying characters composed of a fine component printing unit is printed on the surface of the base paper, the fine component printing unit has a round shape on the entire plane. There has been proposed a printed matter (for example, Patent Document 2) having a copy-preventing pattern in which a cutout portion is formed in the round body portion.

JP 54-74125 A Utility Model Registration No. 3113309

  In the above-mentioned patent document 2, in the range of the reference halftone dot that can be reproduced by the copying machine, by making a special cut in the halftone dot, the area ratio of each halftone dot is suppressed and the density of the latent image is lowered. Since the diameter of the halftone dots other than the latent image can be further reduced, the camouflage effect can be maintained, and when copying, the color of the portion other than the latent image disappears well, for example, clearly expressing “copying”. it can.

  The copying machine has a characteristic that characters and lines of a copy are slightly thickened. In Patent Document 1, the round micro-component printing unit 100 shown in FIG. As shown in FIG. 9 (B), it is fat as shown in FIG. 9B, and in Patent Document 2, as shown in FIG. After copying, since the overall thickness can be made larger than that of the round halftone dot of Patent Document 1, the density of the latent image can be expressed more clearly as “copy”.

  By the way, as described above, the copying machine has a characteristic of slightly increasing the thickness of characters in a copy, whereas a printing machine, for example, an offset printing machine, also has a characteristic that ink is transferred to the paper when the ink is transferred to the paper. 9 has a similar characteristic called dot gain that makes the halftone of the printed matter larger than the designated halftone by penetrating the ink, and if the print density is increased as much as possible, as in FIG. The notch 101 is buried by the thickness of the notch 101.

  For the first time, the inventors of the present invention have developed through the development of printed matter having a copy-preventing pattern that the density of the halftone dot portion of the latent image is increased more than the density of the other portions, which is a factor that impairs the camouflage effect. I found out. Since the print density always varies slightly due to various factors during offset printing, a high operation skill is required to work while ensuring the camouflage effect.

  As a countermeasure above, the print density can be lowered to reduce the thickness of the cutout portion 101, but then the print density of other characters and picture parts of the photo will have to be lowered, and the print density requested by the customer will be reduced. It becomes impossible to put out. In addition, since the overall density decreases and becomes lighter, there is a problem that the latent image does not appear deep even if copying is performed, and the copy prevention effect is lowered.

  Therefore, the present invention is to solve the above-mentioned problems, and to provide a printed matter having an anti-copying pattern capable of reliably forming a latent image displaying characters and figures formed by a fine component printing unit. Objective.

  The invention of claim 1 is a printed matter having a copy-preventing pattern in which a latent image displaying characters and figures made of a fine component printing portion is printed on the surface of a base paper, and the fine component printing portion takes a square form, And it is the shape which notched the corner | angular part, It is characterized by the above-mentioned.

  According to the configuration of the first aspect, the area and the peripheral length can be reduced as compared with the prior art while securing the outer diameter of the fine component capable of securing the expression of the latent image at the time of copying. In addition, it is possible to reduce the area ratio of halftone dots other than latent images, improving the expression of latent images during copying, and improving the visibility of characters and pictures on the original, demanding customers Printed matter with print density can be supplied.

  The invention of claim 2 is characterized in that four corners are cut out.

  According to the configuration of the second aspect, it is possible to further reduce the area and the peripheral length as compared with the prior art while securing the outer diameter that can ensure the expression of the latent image at the time of copying.

  The invention of claim 3 is provided between the chamfered portion and the straight portion, the chamfered portion where the corner portion is notched by chamfering of 45 degrees, the straight portion connecting the adjacent chamfered portions, and the chamfered portion and the straight portion. And an obtuse angle part.

  According to the configuration of claim 3, since the corner portion is obtuse and shorter in circumference than the circular shape, the dot gain change during printing is reduced in offset printing or the like, and the density change during printing is greatly suppressed. This eliminates the need for advanced operation skills.

  The invention of claim 4 is such that the circumscribed circle diameter of the fine component printing portion is 0.18 to 0.22 mm, and the interval between the centers of the adjacent fine component printing portions is 0.30 to 0.45 mm. It is characterized by being.

  According to the configuration of claim 4, the diameter of the circumscribed circle of the fine component printing unit is 0.18 to 0.22 mm, and the interval between the centers of the adjacent fine component printing units is 0.30 to 0.45 mm. By doing so, the expression of the latent image during copying and the camouflage effect can be reliably enhanced and compatible.

  The invention of claim 5 is characterized in that the chamfered portion has a length of 0.01 to 0.03 mm.

  According to the configuration of claim 5, even in a normal CTP printing plate (output resolution: 2400 dpi), the reproducibility of the shape in which the corner portion of the fine component printing portion is cut out is ensured, and the latent image is displayed at the time of copying. It is possible to secure an outer diameter that can secure the property.

  The invention of claim 6 is characterized in that a halftone dot printing portion denser than the latent image is formed in a blank portion other than the latent image.

  According to the configuration of the sixth aspect, the fine component printing unit can be further camouflaged by the halftone printing unit.

  According to the present invention, it is possible to provide a printed matter having a copy-preventing pattern that does not require advanced operation skills in offset printing or the like, and can enhance the expression of a latent image during copying and the camouflage effect.

It is a top view which shows Example 1 of this invention. It is sectional drawing which shows Example 1 of this invention. It is an enlarged plan view of the latent image which expanded a part which shows Example 1 of this invention. It is a top view of the copy paper which shows Example 1 of this invention. It is a top view which shows Example 2 of this invention. It is sectional drawing which shows Example 2 of this invention. It is a top view of the copy paper which shows Example 2 of this invention. It is a top view which shows a prior art example, FIG. 8 (A) shows printed material and FIG. 8 (B) shows a copy. FIG. 9A is a plan view showing another conventional example, and FIG. 9A shows a printed material and FIG. 9B shows a copied material.

  Preferred embodiments of the present invention will be described with reference to the accompanying drawings. The embodiment described below does not limit the contents of the present invention described in the claims of the utility model registration. In addition, all the configurations described below are not necessarily essential requirements of the present invention.

  1 to 4 show the first embodiment, in which a latent image 3 having a content of “COPY copying” composed of a fine component printing unit 2 is printed on a white surface of a base paper 1 using a black ink. A halftone dot printing portion 5 denser than the latent image 3 is formed in the blank portion 4 other than the latent image 3 using black ink. Then, the surface of the base paper 1 is white, and the fine component printing unit 2 has a lightness value of 50 or less in the CIE L * a * b * (Elster, Aster, Biester) chromaticity diagram. It is said. The CIE L * a * b * (surface system) chromaticity diagram is currently most conveniently used for surface color management in the painting and dyeing industries, and is established by JIS.

  The fine component printing unit 2 has a substantially square shape as a whole, and is provided with chamfered portions 6 of 45 degrees at four corners of the square, and the adjacent chamfered portions 6 and 6 are connected by a straight portion 7. An obtuse angle portion 8 is provided between the chamfered portion 6 and the straight portion 7, and has a point-like shape. The chamfered portion 6 is formed in a straight line, and the obtuse angle portion 8 is approximately 135 degrees.

  As shown in FIG. 3, the diameter φ of the circumscribed circle of the fine component printing unit 2 is 0.18 to 0.22 mm, and the distance L between the centers of the adjacent fine component printing units is 0.30. The dimension L6 of the chamfered portion 6 is 0.01 to 0.03 mm. The circumscribed circle is a circle that passes through the eight obtuse angle portions 8.

  The fine component printing units 2 are arranged at equal intervals in the direction of 45 degrees obliquely, which is one direction, and are arranged at equal intervals, arranged in the direction of 45 degrees obliquely in the direction intersecting with the one direction. Are arranged so that the linear portions 7 of the adjacent fine component printing units 2 and 2 face each other in parallel, and the interval L between the centers 9 of the adjacent fine component printing units 2 is 0.45 mm. The micro component printing unit 2 is arranged side by side with chamfered portions 6, 6, 6, 6 arranged vertically and horizontally.

  Further, the halftone dot printing portion 5 is formed in the blank portion 4 other than the latent image 3, which is denser than the latent image 3, that is, the diameter d is smaller than the diameter φ (d <φ). The halftone dot printing unit 5 is called a flat halftone mesh, and has a substantially circular shape with an area ratio of about 5 to 8%. Specifically, 175 halftone dot printing units 5 are arranged in a width of 1 inch, and the area ratio of the halftone dot printing unit 5 is set to about 5 to 8%, similarly to the arrangement of the fine component printing unit 2 These are arranged at equal intervals in one direction and the other direction.

Next, Table 1 below shows a comparison between the fine component printing unit 2 of this example and the fine component printing unit of Patent Document 1 and Patent Document 2. Patent Document 1 shows that the microelement printing unit 100 has a diameter D of 0.18 mm, and the area is πr ² , 3.1415 × 0.09 × 0.09, and 2.545 × 10. a ^-2 mm ^2. Patent Document 2 shows a case where the diameter D of the micro component printing unit 100 is 0.18 mm and the angle of the notch 101 is 40 to 80 degrees. In the present embodiment, the fine component printing unit 2 has a circumscribed circle having a diameter φ of 0.18 mm and a chamfered portion 6 having a dimension L6 of 0.01 mm.

  As shown in Table 1 above, it can be seen that the micro component printing unit 2 of the present embodiment can shorten the circumference even when the diameter φ of the circumscribed circle is substantially the same as the others.

  Next, the operation of the above configuration will be described. On the surface of the base paper 1 on which the latent image 3 and the like are formed, a printing unit 12 for various information such as amounts such as letters and numbers is formed. In the embodiment, “I” is displayed as the printing unit 12. When copying is performed by a copying machine (not shown), the printing unit 12 is copied as shown in FIG. 4 and a latent image 3 of “COPY copying” appears on the copy paper 13. This manifestation is caused by densely forming halftone dot printing portions 5 smaller than the fine component printing unit 2 of the latent image 3 in the margin 4 while the fine component printing unit 2 secures the reference diameter. As a result, the input / output resolution of the copying machine becomes difficult to catch up, and the background portion of the latent image 3 appears lightly or not at all.

  On the other hand, when printing the printing unit 12 for various information such as characters and numbers by offset printing or the like, the fine component printing unit 2 has a short circumference and no cutouts, so that the dot gain change during printing does not occur. The printing density can be increased and high operation skills are not required.

  Furthermore, since the shape of the fine component printing unit 2 is similar to the shape of the halftone printing unit 5 as compared with the case in which the notch portion is provided, the original feeling is less uncomfortable.

  As described above, in the present embodiment, in correspondence with claim 1, in a printed matter having a copy prevention pattern in which the latent image 3 in which characters and figures are formed by the fine component printing unit 2 is printed on the surface of the base paper 1, Since the fine component printing unit 2 is in the form of a square and the corners are notched, the compatibility with the halftone printing unit 5, that is, a flat screen, is improved in terms of camouflage, and the latent image during copying 3 expression, camouflage effect can be enhanced.

  In this way, in this embodiment, corresponding to claim 2, since the four corners are notched, the reference diameter copied by the copying machine is secured, the area is substantially the same, and the circumference is shortened. Therefore, it is possible to greatly reduce the diameter of the halftone dot printing unit 5 other than the latent image 3, and improve the expression of the latent image during copying and the visibility of characters and patterns on the original. In addition, the print density can be increased in offset printing or the like.

  In this way, in this embodiment, corresponding to claim 3, the straight portion 7 that connects between the chamfered portion 6 with the corner portion notched by chamfering of 45 degrees and the adjacent chamfered portions 6,6. And an obtuse angle portion 8 provided between the chamfered portion 6 and the straight portion 7, the corner portion is obtuse and has a shorter circumference than a circle, so that dot gain during printing is reduced, and offset printing is performed. For example, the density change during printing can be greatly suppressed.

  Thus, in this embodiment, in correspondence with claim 4, the diameter φ of the circumscribed circle of the fine component printing unit 2 is 0.18 to 0.22 mm, and the adjacent fine component printing unit Since the center distance L is 0.30 to 0.45 mm, it is possible to reliably enhance the expression of the latent image 3 and the camouflage effect during copying.

  In this way, in this embodiment, the length of the chamfered portion is 0.01 to 0.03 mm corresponding to claim 5, so that the fine CTP plate (output resolution 2400 dpi) also has the fineness. While ensuring the reproducibility of the shape in which the corners of the component printing section are notched, it is possible to secure an outer diameter that can ensure the latent image appearance during copying.

  In this way, in the present embodiment, in correspondence with the sixth aspect, since the halftone dot printing portion 5 denser than the latent image 3 is formed in the blank portion 4 other than the latent image 3, the fine component element printing portion 2 is provided. The halftone dot printing unit 5 can further camouflage.

  Further, as an effect of the embodiment, the fine component printing unit 2 has a point-symmetric shape, and the fine component printing units 2, 2,... Since the distance L in one direction and the distance L in the other direction are equal to each other, the conventional one provided with the notch 101 is arranged in the original direction. While there is a possibility that a slight discomfort may be felt when staring in the state, the fine component printing section 2 having a contrasting shape is arranged at equal intervals in one direction and the other direction intersecting this. So camouflage effect is improved.

  5 to 7 show the second embodiment, and the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In Example 2, the latent image 3 formed by the fine component printing unit 2 is printed on the white surface of the base paper 1 using black ink, and the latent image 4 is printed on the blank portion 4 other than the latent image 3. A halftone dot printing portion 5 having a density higher than 3 is formed using black ink. The blank portion 4 is formed with a white portion 14. The white portion 14 is also provided in the latent image 3 portion. The white portion 14 is, for example, in a substantially strip shape longer than the fine component printing portion 2 and is provided with its orientation and arrangement at random. Note that a pattern portion (not shown) may be provided instead of the white portion 14.

  Next, the effect | action is demonstrated about the said structure. On the surface of the base paper 1 on which the latent image 3 and the like are formed, a printing unit 12 for various information such as amounts such as letters and numbers is made. First, in the original state, the latent image 3 is randomly provided in the latent image 3 and other portions, so that it is more difficult for the latent image 3 to be visually recognized, and the camouflage effect is improved. Further improvement can be achieved. When copying by a copying machine (not shown), the printing unit 12 is copied as shown in FIG. 7 and a latent image 3 of “COPY copying” appears on the copy paper 13.

  The present invention is not limited to this embodiment, and various modifications can be made within the scope of the gist of the present invention. For example, in claim 1, one, two, or three chamfered portions may be provided, and the fine component printing unit 2 has a shape in which at least two corners of a square are cut out, and two chamfered portions are formed. If 6 and 6 are provided and the chamfered portions 6 and 6 are positioned at the opposite corners, the compatibility with the flat net will be improved. Further, it is sufficient that at least one of characters and figures is present.

  As described above, the printed matter having the anti-copying pattern according to the present invention can be applied to various uses.

DESCRIPTION OF SYMBOLS 1 Base paper 2 Micro component printing part 3 Latent image 4 Margin part 5 Halftone dot printing part 6 Chamfer part 7 Straight line part 8 Obtuse angle part 9 Center
12 Printing section
13 Copy paper
14 White area φ Diameter L Interval L6 Chamfer dimension L7 Straight line dimension

Claims (6)

In a printed matter having a copy-preventing pattern in which a latent image displaying characters and figures made of a fine component printing portion is printed on the surface of the base paper, the fine component printing portion takes a square shape and corners are notched A printed matter having an anti-copying pattern characterized by being in shape. 2. A printed matter having an anti-copying pattern according to claim 1, wherein the printed matter has a shape in which four corners are cut out. A chamfered portion that is cut out at 45 ° by chamfering, a linear portion that connects between adjacent chamfered portions, and an obtuse angle portion provided between the chamfered portion and the linear portion. A printed matter having a copy-preventing pattern according to claim 1 or 2. A diameter of a circumscribed circle of the fine component printing unit is 0.18 to 0.22 mm, and a distance between centers of adjacent fine component printing units is 0.30 to 0.45 mm. Item 4. A printed matter having a copy-preventing pattern according to item 3. The printed matter having a copy-preventing pattern according to claim 4, wherein the chamfered portion has a length of 0.01 to 0.03 mm. The printed matter having a copy prevention pattern according to any one of claims 1 to 5, wherein a halftone dot printing portion denser than the latent image is formed in a blank portion other than the latent image.

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