Printed enclosure and method for detecting the enclosure

Abstract

To provide a printed matter enclosing body which allows a user to confirm the presence / absence of a specific enclosed object from the outer side of an envelope even when a printed matter is laminated on the upper layer of the specific enclosed object.SOLUTION: There is provided a printed matter enclosing body 10 in which an infrared print part 2 made of infrared excitation-infrared luminescent ink is provided on a portion on the surface thereof, and a specific enclosed object 1 being the confirmation object for enclosure and a print enclosed object 3 superimposed on the side where the infrared print part 2 is provided are enclosed. Perforations 4 are formed in a region superimposed on the infrared print part in the print enclosed object.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a printed matter enclosure in which a printed matter such as a document is enclosed, and to a printed matter enclosure in which it is possible to detect whether a specific document is enclosed without opening the enclosure after the document is enclosed. [Background technology]

[0002] Conventionally, methods for detecting documents such as printed matter in an envelope without opening the envelope include measuring the weight of the envelope, checking the contents through X-rays, and using magnetic ink on the contents. An example of a case where documents are checked without opening the envelope is when a customer fills out and returns documents after sending them to the customer, and the customer wants to check whether the necessary return documents are included without having to open the envelope each time, thereby improving the efficiency of the work.

[0003] Patent Document 1 discloses an enclosure inspection device that can inexpensively and quickly inspect enclosures enclosed in envelopes for erroneous insertion into the envelope and for matching of multiple pages of enclosures without opening the envelope after sealing. The device prints page identification information and address identification information that identifies the addressee on the envelope using a toner or pigment ink that does not transmit near-infrared rays, and irradiates the envelope with near-infrared rays from the outside using a near-infrared LED to capture and acquire a transmitted image of the absorbed or reflected rays.

[0004] Patent Document 2 also discloses a method for a printed matter having first image information formed from a material that absorbs infrared light and an infrared fluorescent layer containing a phosphor that is excited by infrared excitation light and emits infrared light with a different peak wavelength from that of the excitation light, which is provided on a base material, and second image information corresponding to the first image information recorded in a different location; for example, when infrared light is irradiated from the outside of an envelope, the first image information printed on the enclosure can be obtained, and by comparing it with the second image information, it can be confirmed whether the enclosure and the addressee match.

[0005] The conventional method of measuring weight has the disadvantage that the detection sensitivity decreases when the difference in the weight of the enclosed material is small, the method of transmitting X-rays requires a large amount of money for radiation protection equipment, and the method using magnetic ink has the disadvantage that the ink color is restricted and it is not possible to print in any color.

[0006] In addition, the method disclosed in Patent Documents 1 and 2 for obtaining images that absorb, reflect, and fluoresce by irradiating infrared light has problems in that the reading accuracy decreases when another enclosed item is stacked on top of a specific document, and reading is impossible when the enclosed item stacked on top contains a black printed matter using carbon black ink. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2018-58258 A [Patent Document 2] Patent No. 5957977 Summary of the Invention [Problem to be solved by the invention]

[0008] In view of the problems with the conventional technology as described above, an object of the present invention is to obtain a printed material inclusion that allows the presence or absence of a specific inclusion to be confirmed from the outside of the envelope, even if a printed material is layered on top of the specific inclusion. [Means for solving the problem]

[0009] In order to solve the above problem, one aspect of the present invention is A printed enclosure containing a specific enclosure to be confirmed as being enclosed, the specific enclosure having an infrared-printed section made of infrared-excited-infrared-emitting ink on a portion of its surface, and a printed enclosure overlapped on the side on which the infrared-printed section is provided, The printed insert is characterized in that perforations are formed in the area of ​​the printed insert that overlaps the infrared printed portion.

[0010] In the above printed matter enclosure, The printed insert may be provided with a printed layer of a carbon black-containing ink.

[0011] Another aspect of the present invention is The method for detecting an enclosure includes irradiating infrared light from outside any of the above printed enclosures and detecting infrared light reflected from the infrared printed portion with a light receiving element outside the printed enclosure. Effect of the Invention

[0012] According to the printed matter enclosure of the present invention, Even if a specific enclosed item is enclosed in an envelope with another printed item superimposed on top of it, the presence or absence of the specific enclosed item can be easily confirmed from the outside of the envelope. In addition, since infrared luminescent ink is colorless and transparent, it can be printed without damaging the appearance of the printed item. [Brief description of the drawings]

[0013] [Figure 1] 1 is a schematic cross-sectional view of one embodiment of a printed matter enclosure of the present invention. FIG. [Diagram 2] FIG. 2 is a schematic cross-sectional view of another embodiment of the printed matter enclosure of the present invention. [Diagram 3] FIG. 13 is an explanatory diagram of a manner in which printed matter to be enclosed is overlapped. [Figure 4] 1 is an explanatory diagram of a printed matter detection method according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, the embodiments of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments described below. In addition, in the embodiments shown below, technically preferable limitations are imposed for carrying out the invention, but these limitations are not essential requirements for the present invention.

[0015] 1 is a schematic cross-sectional view of one embodiment of the printed enclosure of the present invention. In the printed enclosure 10, a specific enclosure 1, such as an important document, whose inclusion must be confirmed, is overlaid with other printed enclosures 3, and the enclosure is then enclosed in an envelope 5. An infrared-printed section 2 made of infrared-excited-infrared-emitting ink is provided on a portion of the surface of the specific enclosure 1 on the side on which the other printed enclosures 3 are overlaid. In the area of ​​the printed enclosure 3 that overlaps with the infrared-printed section 2, perforations 4 are provided which are through-holes penetrating the printed enclosure 3.

[0016] Although not shown, there may be another printed enclosure on the side of the specific enclosure 1 where the printed enclosure 3 is not overlapped. In that case, the other printed enclosure does not need to be provided with perforations. The configuration of each part will be described below.

[0017] <Infrared Printing Part 2> It is formed by solid printing of infrared-excited-infrared-emitting ink containing a fluorescent material that is excited by irradiation with infrared light as excitation light and emits infrared light. The solid printing may be performed by offset printing, gravure printing, flexographic printing, screen printing, pad printing, etc., or an infrared printed layer may be formed on the specific inclusion 1 using a transfer sheet, label, etc.

[0018] <Infrared luminescent ink composition> The main components are acrylic, polyester, polyurethane, and epoxy resins, and the pigment is a fluorescent agent that is excited by near-infrared light and emits near-infrared light of a different wavelength from the near-infrared light used for excitation. As such a fluorescent agent, a fluorescent agent in which part of neodymium or ytterbium is replaced with at least one element selected from elements that can take a trivalent form, such as Y, Sc, La, Ce, Gd, Lu, Ga, In, Sb, and Bi, can be used. The pigment content is usually in the range of 5 to 30%, and preferably in the range of 10 to 15%.

[0019] Infrared emitting ink emits light in the near infrared region (901nm to 1100nm) when irradiated with light in the near infrared region (750nm to 900nm) wavelength range, so it can be made to emit light by irradiating this part with infrared light emitted from an infrared LD or infrared LED and exciting it.

[0020] <Specific inclusions 1> The printed matter to be checked for the presence or absence of an inclusion after the production of the printed matter inclusion 10 has the above-mentioned infrared luminescent ink printed on a portion of its surface. The substrate is, for example, any type of paper for printing, but may also be a plastic sheet or the like, and the material is not particularly important.

[0021] <Other printed inserts 3> The substrate is, for example, various types of paper for printing. As shown in Fig. 2, a carbon black ink printing layer 6 may be provided over the entire surface or a part of the substrate. In addition, perforations 4, which are through holes, are provided in the area of ​​the specific inclusion 1 that overlaps with the infrared luminescent ink printing portion 2.

[0022] <Perforation 4> The diameter of the perforations 4 may be generally in the range of 50 to 500 μm, and preferably in the range of 80 to 350 μm. If it is smaller than this range, the light emission becomes weak and difficult to detect, and if it is larger, it becomes easily visible and the appearance is impaired, so the above-mentioned range is appropriate. The area occupancy may be generally in the range of 0.5 to 10%, and preferably in the range of 1 to 7%. The number of perforations may be appropriately set so as to achieve the above area occupancy.

[0023] The shape of the perforations 4 is typically circular, but is not limited thereto, and may be other shapes such as rectangular, in which case it is sufficient that the size corresponds to the above-mentioned diameter. The perforations 4 may be uniform in size or may differ from one another. The distribution of the perforations may be regular or random, or may form a meaningful pattern such as letters or symbols.

[0024] The perforations 4 can be formed by any known method, such as die punching, needle processing, laser processing, or the like.

[0025] <Envelope 5> The envelope 5 is made of paper and has a layer that transmits infrared rays. However, the material is not limited to paper as long as it transmits infrared rays.

[0026] FIG. 3 is an explanatory diagram of a manner in which printed materials to be enclosed are overlapped. A printed enclosure 3, which has a carbon black ink printed layer 6 and perforations 4 formed therein, is overlapped on a specific enclosure 1, which has an infrared printed section 2 formed by printing infrared emitting ink on part of its surface. The perforations 4 are formed in an area that overlaps the area in which the infrared printed section 2 is formed, so that when the two are overlapped, the infrared printed section 2 can be seen through the perforations 4. In this overlapping state, The package is then sealed in an envelope.

[0027] 4 is an explanatory diagram of the printed matter detection method of the present invention. From the outside of a paper envelope 5 in which a specific enclosure 1 and a printed enclosure 3 are stacked and enclosed, infrared light in the above-mentioned wavelength range is irradiated from an infrared light source 12 such as an infrared LD or infrared LED. The infrared light is absorbed in the carbon black ink printing layer 6 of the printed enclosure 3, but the infrared light reaches the infrared printed part 2 at the perforation 4, which excites the infrared printed part 2 to emit infrared light 14 with a different wavelength from the irradiated infrared light. The infrared light is received by a light receiving element 13, and the specific enclosure 1 can be detected. Since the irradiated infrared light and the infrared light emitted by the infrared printed part 2 have different wavelengths, there is no risk of erroneous detection.

[0028] This makes it possible to confirm that the specific enclosure 1 is certainly enclosed without opening the envelope, while if infrared light is not detected, it is possible to know that the specific enclosure 1 is not enclosed. EXAMPLES

[0029] <Example 1> (With perforations) Infrared luminescent ink (SG-YS (made by Nemoto Specialty Chemicals Co., Ltd.) mixed with FD Carton X Medium (made by Toyo Ink Co., Ltd.) at a pigment ratio of 10%) was solid-printed in a 5 mm square on a part of the specified inclusion by offset printing. A printed material printed with carbon black ink and perforated (diameter: 120 μm, area: 1%) in the areas corresponding to the infrared luminescent ink was placed on top of the printed material, and then placed in a paper envelope and sealed. When infrared light emitted from an infrared LED was irradiated onto this area and the light emitted from the infrared emitting ink was detected by a photodiode light receiving element equipped with a long pass filter for wavelengths above 901 nm, the light was detected and the specific enclosed object was detected.

[0030] <Example 2> When detection was performed in the same manner as in Example 1 using the same configuration as in Example 1 except that the shape of the perforations was changed to a diameter of 80 μm, luminescence could be detected.

[0031] <Example 3> When detection was performed in the same manner as in Example 1 using the same configuration as in Example 1 except that the shape of the perforations was changed to a diameter of 350 μm, luminescence could be detected.

[0032] <Comparative Example 1> (Without perforation) The same specific inclusions as in Example 1 were prepared. A printed matter without perforations, which was printed with carbon black ink on the entire back surface, was laminated on top of the specific enclosed item, and the resultant was placed in an envelope and sealed. Detection was attempted in the same manner as in Example 1, but no luminescence could be detected. [Explanation of symbols]

[0033] 1. Specific Enclosures 2. Infrared printing section 3. Printed inserts 4. Perforation 5. Envelope 6. Carbon black ink printing layer 10, 11 Printed matter enclosure 12 Infrared light source 13 Light receiving element 14. Infrared light

Claims

1. A printed enclosure containing a specific enclosure to be confirmed as being enclosed, the specific enclosure having an infrared-printed section made of infrared-excited-infrared-emitting ink on a portion of its surface, and a printed enclosure overlapped on the side on which the infrared-printed section is provided, A printed insert, characterized in that perforations are formed in the area of ​​the printed insert that overlaps the infrared printed portion.

2. 2. The printed enclosure according to claim 1, further comprising a printed layer formed of a carbon black-containing ink.

3. 3. A method for detecting an enclosure, comprising irradiating an infrared light from outside the printed enclosure according to claim 1 or 2, and detecting infrared light reflected from the infrared printed portion by a light receiving element outside the printed enclosure.

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