JP2003001986A - Forgery-proof sheet with divided permeable holes and sheet genuineness judgement method by permeable holes - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide hard-to-fabricate forgery-proof sheets such as a gift certificate, a stock certificate or various kinds of cards, the judgement of genuineness of which is certain. SOLUTION: A plurality of fine permeable holes 6a to 6d obtained by dividing a specific shape such as a figure, a character or a symbol, are formed by dispersing the holes 6a to 6d to the four corners of the sheet through irradiating the sheet such as a gift certificate with a laser beam in different directions. It is determined whether a light is transmitted at the same angle and in the same direction as a laser irradiation angle and a laser irradiation direction when each of the through holes 6a to 6d are formed. When the light does not pass through the holes 6a to 6d, the sheet is judged as forged. Further, when the light passes through the holes 6a to 6d, the light passing through each of the holes 6a to 6d is synthesized and when the synthesized shape coincides with the divided specific shape, the sheet is judged as genuine.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet, such as a stock certificate, a bond, a gift certificate, or an ID card, which requires anti-counterfeiting.
The present invention relates to a determination method for determining whether the sheet is a genuine product or a counterfeit product.

[0002]

2. Description of the Related Art In a conventional anti-counterfeit sheet of this type,
Firstly, a watermark for preventing forgery is put or an identification mark is printed with a special ink, and the watermark or the identification mark is visually confirmed to judge the authenticity. Also, the second
Moreover, it is also practiced to print an identification mark that is normally difficult to see with the naked eye, but that can be seen when copied, and determine whether the identification mark is visible or not.

[0003]

However, according to the first conventional example, due to the recent high performance of the color copying machine and the improvement of the printing technology, there is a counterfeit product which is difficult to judge whether it is true or false at first glance. There is an inconvenience that it may be created. According to the second conventional example, although it is difficult to see with the naked eye, it can be seen by careful observation, and it may cause visual discomfort. Therefore, it is necessary to design to avoid this. There is the inconvenience of becoming the above constraint. An object of the present invention is to provide a sheet for preventing forgery with divided through holes by laser irradiation in different directions, which is difficult to forge, and a method for determining the authenticity of an accurate sheet for authenticity determination, which eliminates such inconvenience. To do.

[0004]

To achieve this object, the forgery-preventing sheet with divided through holes according to claim 1 of the present invention is provided with a pattern, a character, A plurality of minute through holes formed by dividing a specific figure such as a symbol are dispersed and formed at different positions of the sheet.

Also, in order to achieve the above-mentioned object, the true / false judgment method of the sheet by the divided through holes according to the second aspect of the present invention is such that different positions of the sheet are irradiated by irradiation of laser light in different directions. For a plurality of minute through-holes formed by dividing a specific shape such as a figure, a character, or a symbol, light rays are emitted from the same angle and the same direction as the laser irradiation angle and the irradiation direction when forming each of these through-holes. It is determined whether the sheet is a genuine product or a counterfeit product, depending on whether or not the sheet passes, and when the through holes are combined in the case where the sheet passes, whether the sheet forms a specific divided image.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention applied to a gift certificate of a department store will be described below with reference to the accompanying drawings with reference to FIGS. Here, FIG. 1 is a schematic plan view of a gift certificate, FIG. 2 is a schematic partially enlarged plan view of each through hole arranged in a distributed manner, FIG. 3 is a schematic partially enlarged cross-sectional view of a through hole portion, and FIG. Is a schematic explanatory view showing a laser processing state, FIG. 5 is a block diagram showing a control system for forming and synthesizing each through hole, and FIG. 6 is a schematic explanatory diagram showing a state in which each through hole is synthesized.

As shown in FIG. 1, a gift certificate 1 has a caption 2 "Gift Certificate" on the surface thereof and a "Kinichiman Yen, JPY 10,"
000 "and the face value display 3 displayed in the upper and lower two stages, the issuer display 4" [Delta] Department Store Co., Ltd. ", and" No. 12 ".
Issue number 5 "3456" is provided by printing.

Further, through holes 6a, 6b, 6c and 6d for authenticity determination are provided at the four corners of the gift certificate 1 by laser light. Since these through-holes 6a, 6b, 6c, 6d are minute, their shape cannot be discerned by the naked eye and can be discriminated from a mere point. However, when enlarged, as shown in FIG. The contour 7 (see FIG. 6) is divided into four parts 7a, 7b, 7c and 7d. That is,
The through hole 6a is the head portion 7a, the through hole 6b is the tail portion 7b, and the through hole 6c.
Indicates the front leg portion 7c and the through hole 6d corresponds to the rear leg portion 7d. Further, the through holes 6a, 6b, 6c, 6d are provided in different directions at different angles with respect to the paper surface (only the through holes 6a, 6b are shown in FIG. 3).

As shown in FIG. 4, each through hole 6a, 6b, 6
c, 6d are laser light 11 emitted from the laser oscillator 10, a beam expander 12, and a minute dog-shaped contour 7 (see FIG. 6) divided into four parts 7a, 7b,
7c, 7d passes through a rotary stencil 13 having four holes (not shown) having the same shape, and further passes through a condenser lens 14 for adjusting to a set predetermined minute size, and then the gift certificate 1 By irradiating the surface of the, it is formed in a state where it is difficult to identify the shape with the naked eye.

The rotary stencil 13 is a known one, and copper,
It is made of metal such as brass or aluminum, and can be rotated by a motor (not shown). Each through hole 6a, 6
The holes for forming b, 6c, and 6d are provided along the peripheral edge of the rotary stencil 13. Then, the rotating stencil 13 is rotated so that the laser beam 11 passes through the hole located at a predetermined position.

The laser beam 11 passes through a predetermined hole of the rotary stencil 13 and has a cross-sectional shape that conforms to this hole, whereby the through holes 6a, 6b, 6c, formed in the gift certificate 1 are formed. The shape of 6d is, as shown in FIG. 2, each part 7a, 7b, 7c, 7 forming a part of the contour 7.
It becomes a linear shape following d. The laser oscillator 10, the beam expander 12, the rotating stencil 13, and the condenser lens 15 constitute a laser processing machine 30 (see FIG. 5).

More specifically, for example, at a predetermined position of the rotary stencil 13, holes having the same shape as the respective parts 7a, 7b, 7c, 7d obtained by dividing the dog contour 7 shown in FIG. The rotary stencil 13 is rotated by a predetermined amount so that the laser beam 11 passes through a predetermined one of these holes, and the laser beam machine 30 is tilted at a predetermined angle in a predetermined direction so that each through hole 6a, 6b, 6c and 6d are formed one by one at predetermined corners of the gift certificate 1. The inclination angle of the laser processing machine 30 is the same for each of the through holes 6a, 6b, 6c, 6d, but only the directions may be different.

The irradiation operation of the laser light 11 is under the control of the control device 31 shown in FIG. That is,
The control device 31 calls the machining pattern data which is input from the input device 34 in advance and is stored in the RAM of the storage device 32, and sends a machining control signal corresponding to the machining pattern data to the laser machining displacement device 33. By the laser processing displacement device 33, the rotary stencil 13 is rotated and tilted in a predetermined direction to form the through holes 6a, 6b, 6c, 6d at predetermined positions of the gift certificate 1 at predetermined angles as shown in FIG. It is transparent.

Incidentally, instead of the inclination of the laser processing machine 30,
The laser beam 11 may be applied to a predetermined position of the gift certificate 1 by moving the gift certificate 1 in the XY directions and inclining it by a predetermined angle.

As the laser oscillator 10, a carbon dioxide gas laser oscillator, an excimer laser oscillator, a YAG laser oscillator, or the like can be used, and the laser oscillator is not limited to a specific laser and is selected according to the material of the sheet base material. . In the case of the gift certificate 1, a commercially available carbon dioxide gas laser oscillator was used.

In the present embodiment, each through hole 6a, 6b, 6c, 6d formed in the gift certificate 1
The laser irradiation angle and the irradiation direction for forming a, 6b, 6c, 6d are called from the storage device 32, the CCD camera 35 is directed from the same angle and the same direction, and an image is displayed on the display device 37. By doing so, whether or not the light beam passes through each of the through holes 6a, 6b, 6c, 6d is confirmed on the image on the display device 37, and if it does not pass, it is determined that it is a counterfeit product. When it passes, the through holes 6a, 6
Light rays that have passed through b, 6c, and 6d are combined by the image processing device 36, the combined image is displayed on the display device 37, and the preset dog contour 7 shown in FIG. If not configured, it is judged as a counterfeit product.

The present invention is not limited to the above-described embodiment, and can be applied to various securities, banknotes, various cards other than the gift certificate 1, and the material of the sheet is not limited to paper. Instead, it may be synthetic paper, plastic, or metal. Further, the irradiation angles of the laser light may be kept the same, and the irradiation directions may be different to form the through holes 6a, 6b, 6c, 6d.

Further, the shape of the through hole may be one obtained by dividing the contour of a shape such as various animals, stars, plants, people, or various marks into a plurality of shapes, or a minute shape instead of dividing the contour. You may divide itself. For example, at a predetermined position of the rotary stencil 13, the dog contour 9 shown in FIG.
A hole having the same shape as each of the divided portions 9a, 9b, 9c, 9d is formed in advance, and each portion 8a, 8b, 8c, 8d obtained by dividing the dog shape itself (see FIG. 7) into four is formed on the gift certificate 1. You may.

[0019]

As described above, according to the forgery prevention sheet with divided through holes according to claim 1 of the present invention,
Although it looks like only a point with the naked eye, actually each minute through hole of a shape that is divided into multiple parts so as to form a part of a specific shape is irradiated with laser light at a predetermined irradiation angle and irradiation direction. Since it is dispersed and formed on the sheet, it is difficult to create a counterfeit product, and a deterrent against the creation of a counterfeit product works, which contributes to the prevention of counterfeiting.

According to the sheet authenticity determination method using divided through holes described in claim 2 of the present invention, each of the through holes is divided into a plurality of minute through holes formed by dividing a specific image formed on the sheet. Confirm whether the light beam passes from the same angle and the same direction as the laser irradiation angle and irradiation direction when forming
If it does not pass, it is determined that it is a counterfeit product, and if it passes, the rays that have passed through each through hole are combined to form a specific figure such as a preset figure, character, or symbol that is a genuine article. If the specific image is not formed, the product is determined to be a counterfeit product, so that it is possible to accurately determine whether the product is true or false.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a gift certificate.

FIG. 2 is a schematic partial enlarged plan view of each through hole arranged dispersedly on a gift certificate.

FIG. 3 is a schematic partial enlarged sectional view of a through hole portion of a gift certificate.

FIG. 4 is a schematic explanatory view showing a laser processing state.

FIG. 5 is a block diagram showing a control system for forming and synthesizing each through hole.

FIG. 6 is a schematic explanatory view of a state in which each through hole is combined.

FIG. 7 is a schematic partially enlarged plan view of respective through holes that are dispersed and arranged in another embodiment.

FIG. 8 is a schematic explanatory view of a state in which each through hole is combined in the same embodiment.

[Explanation of symbols]

1 gift certificate 6a, 6b, 6c, 6d through hole 7 dog contour 10 Laser oscillator 11 laser light 12 beam expander 13-turn stencil 14 Condensing lens 30 Laser processing machine 31 Control device 32 storage 33 Laser processing equipment 34 Input device 35 CCD camera 36 Image processing device 37 Display

Claims (2)

[Claims] 1. By irradiating laser light in different directions,
A forgery prevention sheet with divided through holes, characterized in that a plurality of minute through holes formed by dividing a specific shape such as a figure, a character, or a symbol are dispersed and formed at different positions of the sheet. 2. A plurality of minute through holes formed by dividing a specific shape such as a figure, a character, or a symbol, which are formed at different positions on a sheet by irradiating laser light in different directions,
Whether or not a light beam passes from the same angle and the same direction as the laser irradiation angle and the irradiation direction when forming each of these through holes,
Also, when passing through, if each through hole is combined, it is judged whether the sheet is a genuine product or a counterfeit product depending on whether or not the divided specific image is formed. False decision method.