JPH07137491A - Forgery preventive sheet and method of confirming its original image - Google Patents

Abstract

PURPOSE:To provide a forgery preventive sheet of an image which is stuck onto an image which is not desirous to be forged, the image different from an original image is expressed, reproduction and copy are prevented, its original image is restored easily to its original state and confirmed. CONSTITUTION:A forgery preventive sheet 10 of an image comprised by sticking transparent plastic sheet which has a larger area than that of the image 12 and juxtaposed a large number of pyramid-shaped protrusions 15 on one side on the image 12 which is formed on a negotiable instrument and not desirous to be forged, a decision sheet 10a comprised of the transparent plastic sheet on one side of which a large number of the pyramid-shaped protrusions 15 are juxtaposed is piled upon the forgery preventive sheet 10, the protrusion 15 of the decision sheet 10a and a recessed part 16 forming the protrusion 15 of the forgery preventive sheet 10 are joined to each other by engaging them with each other and the image is reproduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image anti-counterfeit sheet and an original image thereof for preventing copying of an image, such as a seal imprinted on securities, which is not desired to be forged by a photographer or a copying machine. It is related to the confirmation method of.

[0002]

2. Description of the Related Art In recent years, a copying machine and a simple printing machine equipped with a photographing device have been remarkably developed, and it is possible to reproduce the same quality as an original image. As a result, for example, a seal can be copied from securities of a third party, printed on a certificate, or stamped with a counterfeit seal based on this copy, and cash can be transferred from the deposit account of the third party. There is a problem such as pulling out. For this reason, some images of securities (for example, bankbooks) cannot be directly visually inspected, and the images can be hidden by a special sticker that allows the original image to be confirmed by special equipment. A concealment seal is used to prevent duplicate reproduction.

[0003]

However, the above-mentioned concealment seal is complicated to manufacture and costly. Therefore,
It was limited to images of parts that you do not want to be forged, such as some securities such as seals and personal identification codes. Furthermore, a special device is required to confirm the original image, which requires a facility cost and burden for the confirmation. For this reason,
There has been a strong demand from related parties for a counterfeit prevention sheet that cannot be reproduced and copied and that allows easy confirmation of the original image.

Therefore, in the present invention, an image which is pasted on an image which is not desired to be counterfeited and which expresses an image different from the original image to prevent reproduction and copying, and which allows the original image to be easily restored and confirmed. It is intended to provide a method for checking an anti-counterfeit sheet and its original image.

[0005]

In order to achieve the object, the present invention is one in which an anti-counterfeit sheet having an area larger than the image is pasted on an image which is not desired to be forged formed on securities or the like. This anti-counterfeit sheet is characterized in that a large number of polygonal pyramidal protrusions are juxtaposed on one surface of a transparent plastic sheet, and the protrusions of the plastic sheet are attached to the image as the surface of the image. It is an anti-counterfeit sheet.

Further, according to the present invention, a transparent plastic sheet having a larger area than the image and having a large number of polygonal pyramidal protrusions juxtaposed on one side of the image which is not to be forged is formed on securities or the like. An image forgery prevention sheet is adhered, and a judgment sheet made of a transparent plastic sheet having a plurality of polygonal pyramid-shaped protrusions arranged in parallel on one surface is overlaid on the forgery prevention sheet, and the protrusions of the judgment sheet, This is a method for confirming an original image, characterized in that the recesses forming the protrusions of the anti-counterfeit sheet are meshed with each other and joined to reproduce the original image.

The protrusions of the anti-counterfeit sheet and the judgment sheet are formed in any one of a triangular pyramid, a quadrangular pyramid, and a hexagonal pyramid.

[0008]

The operation according to claim 1 of the present invention is an image anti-counterfeit sheet in which a transparent plastic sheet having a large number of polygonal pyramidal protrusions arranged on one side is stuck on an image which is not desired to be forged. There is a polygonal pyramid-shaped protrusion on one side, and when light hits, the image becomes invisible due to total reflection or diffuse reflection, or the outline of the image looks jagged.
The shape is different from the original image. Therefore, it is impossible to take a photograph or reproduce the original image by a copying machine, and thus it is impossible to forge.

The operation according to claim 2 of the present invention is as follows.
The protrusions of the judgment sheet formed in the same manner as this anti-counterfeit sheet should be meshed and joined to the recesses that form the protrusions of the anti-counterfeit sheet with the protrusions on the surface that you do not want to be counterfeited. Then, it becomes a single transparent plastic sheet, and the original images of the lower layer of the anti-counterfeit sheet can be reproduced and confirmed by canceling the refractive indexes of each other.

[0010]

Embodiment An embodiment will be described with reference to the drawings. FIG. 1 is a plan view (A) showing an example of fine polygonal pyramid-shaped protrusions formed on the surfaces of the forgery prevention sheet and the judgment sheet of the present invention.
FIG. 4B is a partially enlarged view showing an example of the protrusion.

As shown in FIG. 1, a large number of fine polygonal pyramidal protrusions 15 are formed on one surface of a transparent plastic sheet (in this embodiment, they are quadrangular pyramidal protrusions), and the protrusions are formed. The bottoms of the parts 15 are arranged side by side without a gap. When light is applied to the polygonal pyramidal protrusion 15 from the front, the light is totally reflected on the front and is transmitted without being reflected when the incident angle changes. So-called retroreflectivity is generated, and the anti-counterfeit sheet 10 is formed by applying this.

In the present embodiment, the anti-counterfeit sheet 10 having the polygonal pyramidal projections 15 for producing the retroreflective property has a projection on a pyramid having a square bottom as shown in FIG. 1B. However, the effect does not deteriorate even if the protrusions have a triangular pyramid shape or a hexagonal pyramid shape (not shown). The transparent plastic sheet used for the anti-counterfeit sheet 10 is a thermoplastic plastic sheet having protrusions formed by pressing a metal mold, but is not limited thereto, and a vinyl chloride sheet is suitable as a material.

FIG. 2 is a sectional explanatory view showing a state in which an anti-counterfeit sheet is stuck on an image which is not desired to be forged according to the present invention. As shown in FIG. 2, the anti-counterfeit sheet 10 having a larger area than the image is provided on the surface of the paper base material 13 with the adhesive 11 so as to cover the image 12 which is not desired to be forged. It has been pasted. As a result, as shown in FIG. 4 (A), the periphery of the image that is not desired to be forged looks jagged, and the accurate original image cannot be confirmed. Therefore, even if the image 12 on which the anti-counterfeit sheet 10 is attached is photographed or reproduced by a copying machine, the image becomes invisible due to retroreflection, and a jagged image is reproduced as if it is visually observed. Can not.

FIG. 3 is a cross-sectional explanatory view showing a state in which an image judgment sheet is joined to an image on which the anti-counterfeit sheet according to the present invention is stuck and an original image is reproduced. Figure 3
As shown in FIG. 3, the recessed portion 1 of the forgery prevention sheet 10 is stuck on the image 12 which is not desired to be counterfeited with the protrusion 15 as the surface.
6 and the protrusion 15 of the judgment sheet 10a formed in the same manner as this anti-counterfeit sheet are meshed and joined to each other to form a single transparent plastic sheet and allow light to pass therethrough, as shown in FIG. The original image can be visually confirmed as shown in FIG.

This means that, for example, when an original image of an image that is not desired to be forged, such as a seal, is checked and collated at a window of a financial institution, this judgment sheet 10a is prepared and a forgery prevention sheet is attached. The original image can be easily confirmed and collated by superimposing it on the open part and joining it exactly.

[0016]

INDUSTRIAL APPLICABILITY The present invention is an anti-counterfeit sheet made of a transparent plastic sheet having retroreflective properties, in which an anti-counterfeit sheet is pasted on an image which is not desired to be forged, and a polygonal pyramid provided on one side of the sheet. Due to the projections of the shape, the image becomes invisible due to total reflection or diffuse reflection when exposed to light, or the contour of the image looks jagged and has a shape different from the original image. Therefore, it is impossible to take a photograph or reproduce the original image by a copying machine, and thus it is impossible to forge.

Further, according to the present invention, a judgment sheet formed in the same manner as the anti-counterfeit sheet in the recess forming the projection of the anti-counterfeit sheet adhered with the projection on the surface which is not desired to be forged. By engaging and joining the protrusions of one, it becomes a single transparent plastic sheet state, mutually canceling the refractive index of light, the original image of the lower layer of the anti-counterfeit sheet is reproduced, and it is easy to check and collate. This is a possible original image confirmation method.

[Brief description of drawings]

FIG. 1 is a plan view (A) showing an example of a fine polygonal pyramid-shaped protrusion formed on the surface of a forgery prevention sheet and a judgment sheet of the present invention, and a partially enlarged view (B) showing an example of the protrusion. Is.

FIG. 2 is a cross-sectional explanatory view showing a state in which a forgery prevention sheet is stuck on an image that is not desired to be forged in the present invention.

FIG. 3 is a cross-sectional explanatory view showing a state in which an image determination sheet is joined to an image on which an anti-counterfeit sheet according to the present invention is attached and an original image is reproduced.

FIG. 4 is an explanatory diagram (A) showing an example of a state of an image when an anti-counterfeit sheet is attached to the image, and an explanatory diagram (B) showing an example of an original image by a determination sheet.

[Explanation of symbols]

 10 ... Counterfeit prevention sheet 10a ... Judgment sheet 11 ... Adhesive 12 ... Image 13 ... Paper base material 15 ... Polygonal pyramidal projection 16 ... Recessed portion

Claims (3)

[Claims] 1. An anti-counterfeit sheet of an image formed by sticking a sheet having an area larger than the image on an image formed on securities or the like which is not desired to be forged, wherein the anti-counterfeit sheet is a transparent plastic. An image anti-counterfeit sheet, comprising a plurality of polygonal pyramidal projections arranged in parallel on one surface of the sheet, and the projections of the plastic sheet being attached to the image. 2. An anti-counterfeit image made of a transparent plastic sheet, which has a larger area than the image and is provided with a large number of polygonal pyramid-shaped projections in parallel on an image formed on securities or the like which is not desired to be forged. A sheet is attached, and on the anti-counterfeit sheet, a judgment sheet made of a transparent plastic sheet having a large number of polygonal pyramidal projections arranged in parallel on one surface is overlaid, and the projections of the judgment sheet and the anti-counterfeit sheet A method for checking an original image, characterized in that the recesses forming the protrusions are meshed with each other and joined to reproduce the original image. 3. The projections of the forgery prevention sheet and the judgment sheet are formed in any one of a triangular pyramid shape, a quadrangular pyramid shape, and a hexagonal pyramid shape. The image forgery prevention sheet described in 2 and the method for confirming the original image.