JPH0854825A - Label - Google Patents

Abstract

PURPOSE:To make it possible to easily and surely discriminate authenticity by printing the front surface of a plastic film coated with a tacky adhesive on its rear surface with characters and patterns and printing these patterns with a conductive coating material. CONSTITUTION:The front surface of the polyester film 1 coated with the tacky adhesive on its rear surface is printed with the continuously iterated patterns 2 along the outer periphery of the film 1 with the conductive coating material of carbon or the like by using a roll type screen printing machine in such a manner that, for example, their thickness attains 10mum. The front surface is thereafter printed with a merchandise number 3, a series number 4 and manufacture date 5 by a thermal transfer printer. Whether the patterns are printed by the conductive coating material or not, i.e., the authenticity of the label, is electrically discriminated by the simple operation of bringing a conductivity tester into contact with the front surface of such label. Then, imitations and stolen articles camouflaged by forged labels are easily discriminated and the distribution of such merchandise in markets is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a label printed with characters and patterns to be attached to various products.

[0002]

2. Description of the Related Art Most products have a label printed with characters or patterns for identifying the adherend such as the manufacturer's name and mark, the product name and the date of manufacture, in order to manage the product by the manufacturer / seller. Attached for convenience. On the other hand, such a label also has a function of determining whether or not the adherend is authentic.

However, the function of such a label is abused to imitate an imitation product or a stolen product as a genuine product, which often impairs the credibility of the product. For example,
A label peeled off from a genuine product may be attached to the imitation product to make it look like a genuine product, or it may be attached to a stolen product to conceal a stolen product.

Further, the label may be attached for sealing, and in this case, it has a function of indicating that the package is unopened. In order to make the opened product look like an unopened product by misusing this function, a label that has been peeled off is attached again. If this is easily done, it is not preferable because it relates to the safety of products, especially in foods and pharmaceuticals.

Therefore, as a countermeasure against the abuse of such a label, for example, replacement by making it impossible to reuse it once it is peeled off or making the traces of the peeling clearly remain on the label surface or the adherend. Various devices having a prevention structure have been proposed.

On the other hand, instead of replacing the label to make the imitation product or the stolen product look like a genuine product, it is also possible to forge the label itself and attach it to the imitation product or the theft product. As a countermeasure in this case, there is a method in which special printing is performed on the label surface to make it easy to determine the authenticity of the counterfeit label. For example, using a fluorescent dye / pigment or printing with a check digit on the label surface,
There are those that use a negative film or black light to judge the authenticity.

[0007]

However, in such a conventional type label, in any case, it is difficult to easily and surely determine the authenticity of the affixed label only by visual inspection. It was

The present invention has been devised in order to eliminate such disadvantages of the prior art, and its main purpose is to:
It is to provide a label whose authenticity is easily and surely determined.

[0009]

According to the present invention, the above-mentioned object is a label formed by printing characters or a pattern on the surface of a plastic film having a back surface coated with an adhesive. It is achieved by providing a label characterized in that at least part of it is printed with a conductive paint. In particular, it is preferable that the film has brittleness.

[0010]

In this way, whether or not the pattern is printed with the conductive paint, that is, the authenticity of the label can be electrically determined by a simple operation such as bringing the current tester into contact with the label surface. The discrimination work becomes extremely easy and reliable. Therefore, it is possible to easily discriminate a counterfeit product or a stolen product that is disguised using a counterfeit label, or a product whose contents are non-genuine once opened, and prevent these products from being distributed in the market.

In particular, if the film is brittle, the film will be deformed / broken when peeled off, making it difficult to replace the label, and the effect of preventing distribution of camouflaged products and non-genuine products will be further improved. .

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 shows three examples of labels to which the present invention is applied.

Example 1 The label shown in FIG. 1- (A) is, for example, affixed to an electric washing machine, and has a thickness of 50 with adhesive applied to the back surface.
A pattern 2 is printed on the surface of the polyester film 1 having a thickness of 10 μm using a roll type screen printing machine so that the thickness becomes 10 μm, and then the product number 3, the manufacturing number 4 and the manufacturing date 5 Is printed by a thermal transfer printer. The pattern 2 is continuously repeated along the outer periphery of the film 1.

The conductive paint is composed of a pigment or a part thereof made of a conductor, and a conductive paint film having a pattern formed by curing is mixed so as to have a conductivity close to that of a metal material. , Is used for wiring of a wiring board and an electromagnetic wave shield. As the conductive paint used in the present invention, carbon, one containing a conductive material such as silver or copper is considered, but from the stability of the resistance value of the conductive paint film, carbon or silver is preferable, In particular, the carbon type is most suitable in terms of color, adhesion to the film 1 and flexibility of the film. Almost the same characteristics can be obtained with a mixture of carbon and silver.

The authenticity of such a label is determined by the current tester as shown in FIG. In this energization tester, the probe 15 is brought into contact with the pattern 2 printed on the label, and when energized, the transistors Tr1, Tr2, Tr3
The buzzer 16 as a display means is operated via the above-mentioned means to inform that the pattern 2 is made of conductive paint. The probe 15 is a needle-shaped parallel electrode 15a in which two gold-plated copper wires having a diameter of 0.5 mm are arranged at intervals of 1.5 mm.
Is to have. 6.3 in parallel with the buzzer 16
A capacitor C of V and 100 μF is provided. A 1.5 V battery is used as the power supply 17. Also, 1
The sensitivity is adjusted by the variable resistance VR of 0 kΩ. Resistor R1
R2 is 1 kΩ. The display means may be a light emitting diode or a combination of the light emitting diode and the buzzer 16. Further, the display means may be ON / OFF controlled via a relay.

The sensitivity of this current tester is adjusted according to the resistance value of the conductive paint film. If the sensitivity is low, it is necessary to bring the electrode 15a into contact with the conductive paint film with a high pressing force, which may damage the conductive paint film, which is not preferable. On the other hand, if the sensitivity is too high, malfunction may occur due to the effect of water adhering to the surface of the film 1 or the tip of the probe 15.

The resistance value of the conductive paint film is 100 to 1, when the tip interval of the electrodes 15a of the probe 15 is 1.5 mm.
500Ω is desirable, and the type of conductive paint, the size and shape of the pattern, the line width, the printing conditions of silk screen printing (drying method, plate mesh, paint thickness), etc. are selected so as to obtain this value. The thickness of carbon paint is 8 to 1
By setting the thickness to 5 μm, a desired resistance value can be obtained.

Example 2 The label shown in FIG. 1- (B) is, for example, affixed to a vehicle body member for automobiles, and is made of a 50 μm thick brittle vinyl chloride film 6 having an adhesive applied to the back surface. On the surface,
12μ thick using roll type silk screen printing machine
The pattern 7 is printed with the carbon-based conductive paint so that the length becomes m, and then the serial number 8 is printed by the thermal transfer printer. The pattern 7 is a mark of the manufacturing company and is randomly arranged around the manufacturing number 8.

As with the first embodiment, the authenticity of the thus-formed label is determined by the current tester shown in FIG. Further, when the label is peeled off, the film 6 itself is stretched / broken and cannot be reused because the film 6 is made of a brittle material. If the label that has been peeled off is attached again, the pattern 7 on the surface is distorted, so that it is possible to determine whether or not the label has been replaced.

Example 3 On the surface of a polyester film having a thickness of 50 μm, FIG.
-As shown in (B), the same pattern and manufacturing number as in Example 2 are printed. Between the back surface of this film and the pressure-sensitive adhesive, a peelable pattern print forming the character "VOID" as a whole is applied. The pressure-sensitive adhesive contains, for example, a coloring pigment such as a white pigment and a migrating fluorescent dye.

When this label is peeled off, only the peelable pattern-printed portion and the adhesive portion in contact with it are peeled off from the film and left on the adherend. Therefore, the white adhesive-free portion, that is, the character portion of "VOID" can be seen through, and a trace indicating that the label has been once removed remains on the label. On the other hand, the adhesive part left on the adherend looks like "VOID" white letters, and the transferable fluorescent dye has migrated to the coating film and synthetic resin material of the adherend around it. The trace of the label can be clearly recognized by the irradiation of.

As a method of leaving the trace of the label clearly on the adherend in this way, a migration dye may be used and mixed in the adhesive agent. in this case,
The traces of the label formed by the migration dye that has migrated to the adherend can be visually recognized with the naked eye. Also these coloring pigments,
The migration dye and the migration fluorescent dye may be used alone or in combination other than the above.

Example 4 The label shown in FIG. 1- (C) is used, for example, for sealing individual packaging boxes for pharmaceuticals. A silk screen printing machine is applied to the surface of a polyester film 7 having a thickness of 50 μm. A pattern 10 consisting of double framing lines is printed with a carbon-based conductive paint so that the thickness is 10 μm, and the letters “sealing” 11, the manufacturer's mark 12 and the product name 13 are silk. It was printed by a screen printer. This film 7 has a re-attachment prevention structure in which a peelable pattern printing layer, which is the character "opening" as a whole, an aluminum vapor deposition film layer, and an adhesive layer are sequentially formed on the back surface.

The authenticity of the label thus formed is determined by the current tester shown in FIG. Further, when the label is peeled off, as in Example 3, only the peelable pattern-printed portion and the aluminum vapor deposition film portion and the adhesive portion in contact with the peeled-off portion are peeled off from the film and left on the adherend. In other words, the letters "open" can be seen through, and the traces that have been peeled off remain clearly. On the other hand, the silver letters of "open" remain on the adherend, and it is possible to clearly see that the open.

By the way, in the case of a label for sealing such an individual wrapping box, it is necessary to inspect for the presence or absence of the label at the time of shipping, but this inspection can be speeded up by using a current tester. Figure 3 shows conveyor 2 before packing in dozen boxes
The inspection situation of the presence or absence of the label 23 with respect to the individual packaging box 22 moving above 1 is shown. Here, the individual packaging box 22
Label 2 affixed so as to hang on two sides across the ridgeline of
The ring-shaped electrodes 3 of one roller-type probe 24 are arranged so as to be in contact with the respective surfaces, in order to inspect that 3 is accurately attached to a predetermined position and is surely sealed. The roller type probe 24 is electrically connected to the same electrical tester as that shown in FIG. In this way, the presence or absence of the label 23 is inspected, and the individual packaging box without the label 23 is automatically lined out.

In each of the above embodiments, the pattern was printed using only one type of carbon-based conductive paint, but the present invention is not limited to this, and a plurality of conductive paints may be used. It may be painted separately.

[0027]

As is apparent from the above description, according to the label of the present invention, it is extremely easy to verify the authenticity of the label.
Since it can be surely discriminated, an article forged by the counterfeit label can be found, and such an article can be prevented from being distributed in the market. The same applies to articles that have been opened and then resealed. Moreover, as shown in the fourth embodiment, there is an effect that the inspection for the presence or absence of the label at the time of factory shipment can be simplified and speeded up. In addition, as described above, it is extremely difficult to duplicate the label by printing the pattern using several kinds of conductive paints, and the effect of preventing distribution of a camouflage article is further improved.

In particular, if the film is brittle, the pattern on the surface of the film is distorted as the film is deformed / broken when peeled off. Therefore, whether or not the attached label is once peeled off. Can be easily and reliably determined. Therefore, it is extremely difficult to disguise an imitation product or a stolen product by replacing the genuine label, or to reseal a product that has been opened once, and the effect of preventing the distribution of the disguised product or the product having a non-genuine content is further improved. Similar effects can be expected by forming a replacement prevention structure on the back surface of the film in addition to pattern printing using a conductive paint as shown in Examples 3 and 4 above.

[Brief description of drawings]

FIG. 1 is a plan view showing a third embodiment of a label to which the present invention is applied.

FIG. 2 is a circuit diagram showing a schematic configuration of an electrification tester.

FIG. 3 is a perspective view showing an inspection state of the label shown in FIG.

[Explanation of symbols]

 1 Film 2 Pattern 3 Product Number 4 Manufacturing Number 5 Manufacturing Date 6 Film 7 Pattern 8 Manufacturing Number 9 Film 10 Pattern 11 Character 12 Mark 13 Product Name 15 Probe 15a Electrode 16 Buzzer 17 Power Supply 21 Conveyor 22 Individual Packaging Box 23 Label 24 Roller type probe 25 electrodes

Front Page Continuation (72) Inventor Tadashi Shiraishi 2-9 Aoyagi, Soka-shi, Saitama Yamax Corporation Tokyo Business Headquarters Saitama Factory

Claims (2)

[Claims] 1. A label formed by printing characters or a pattern on the surface of a plastic film having a back surface coated with an adhesive, wherein at least a part of the pattern is printed using a conductive paint. A label characterized by that. 2. The label according to claim 1, wherein the film is brittle.