JPH0650220Y2 - Confidentiality documents - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to confidential documents, more specifically, mail-order documents, direct mail, correspondence documents between companies, or documents addressed to a specific person within the company. The present invention relates to a document that can temporarily hide information, sentences, and the like that are desired to be hidden.

[Prior Art] In many cases, it is desirable for a mailing list such as a mail order document to contain various contents that should not be seen by a third party. In such a case, communication is generally carried out by using a sealed letter, but a postcard is often used for the following reasons. That is, in the case of envelopes, the work of sending contents documents and envelopes, collating the contents documents with envelope destinations, enclosing and sealing work, and the like are much more troublesome than sending postcards. In addition, the communication cost is higher than that of postcards, and the difference can not be neglected for the side dealing with a large amount of communication.

Also, in the case of documents etc. addressed to a specific person in the company, in a special case, communication is performed as a complete sealed letter, but normally, in addition to the addressee, confidential or confidential information is displayed, and it is opened. Often in a state.

[Problems to be solved by the invention] Therefore, in the above-mentioned postcard, in-house mail, etc., various contents that should be hidden should be left in a state where they can be easily peeped if a third party desires. Has been done.

In addition, some postcards will have information such as stickers attached.
There are examples of concealing sentences etc., but in this case, of course it takes extra time to stick the seal, and it becomes troublesome for the reader to peel off the sticker, and on the other hand, if the sticker is easy to peel off, it means that the sticker is attached. The conflicting problem of disappearing will occur.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to provide a confidentiality document having an excellent confidentiality retaining function, which can be created with the same labor as a conventional normal document. .

[Means for Solving the Problems] In order to achieve the above object, the present invention uses a reversible thermosensitive coloring ink capable of repeating coloring and erasing only by controlling thermal energy. Letters, numbers, etc. are described in the documents.

[Operation] In the confidential document having the above structure, when the document is transferred from the sender to the receiver or stored, the reversible thermosensitive coloring ink for displaying characters, numbers, etc. becomes transparent. It is maintained in the opened state, that is, the invisible state. Also the above characters,
At the time of reading numbers or the like, this document is heated in the first predetermined greenhouse so that the coloring ink is converted into a coloring state, that is, a visible state. Further, when the above-mentioned characters are made invisible again, this document is heated to the second predetermined temperature to make the color-forming ink transparent.

[Examples] Examples of the reversible thermosensitive coloring ink usable for the confidential document of the present invention include Japanese Patent Application Nos. 1-9058 and 1-90.
Disclosed in 59. Both color-forming inks are mainly composed of leuco compounds, color-developing and reducing agents, and binders.
While it develops color (about 50 ° C. to about 80 ° C.), it has the property of disappearing and becoming transparent with higher heat energy h2 (about 120 ° C. to about 150 ° C.). That is, according to the same color-forming ink, it is possible to repeat the color-forming and the color-erasing only by controlling the heat energy.

FIG. 1 and FIG. 2 are front views showing an embodiment of a confidentiality document according to the present invention using the same coloring ink in a different mode, which is assumed to be a communication postcard 10 from a financial institution. . In the postcard 10, the amount, that is, the number, is entered in each amount column 12 based on the record in the financial institution, and is mailed to the destination.

First, the respective numbers are printed on the present document as shown in FIG. 1 by the reversible thermosensitive coloring ink in the coloring state to which the coloring heat energy h1 is applied in advance, and the collation with the record is confirmed. The most desirable mode of printing for this purpose is to manufacture an ink ribbon using the above color-forming ink in advance and print it using the printer. Further, it is also possible to superimpose a transfer foil on which the above-mentioned color-forming ink layer is applied and formed on the postcard 10 and print with a normal printer.

Next, the postcard 10 is heated by a predetermined device formed so as to apply the decoloring heat energy h2 to the color forming ink. By this operation, the color-forming ink is made transparent, so that the respective numbers become invisible as shown in FIG. As a device for this heating, it is possible to use a device such as a thermostatic bath that can heat-treat a large amount of postcards at once. The color ink once made transparent remains in that state until the postcard 10 is mailed to the destination and the following heating operation is performed.

After the postcard 10 arrives at the customer, it is heated by a predetermined device configured to apply the coloring heat energy h1 to the coloring ink before reading the numeral. By this operation, the color-forming ink is converted into the color-forming state again, so that the respective numbers become visible again as shown in FIG. As the device for this heating, the same device as described above can be used, and by providing the device with a temperature control mechanism, it can be used in both heat treatments.

Further, when it is necessary to make the numbers invisible again for convenience of storage, the postcard may be heated again so that the decoloring heat energy h2 is applied.

Incidentally, in the above-mentioned embodiment, the description was made by first performing the procedure of entering a number with the ink in the color-developed state and confirming the collation with the record. However, when this confirmation work is not particularly necessary, the ink in the decolorized state is used from the beginning. May be filled in. In that case, the work can be simplified by one step.

[Effect of the Invention] According to the confidentiality document of the present invention, it is possible to provide an excellent confidentiality holding function, even though the confidentiality document can be created with the same labor as a conventional document. Moreover, this confidentiality document can be applied not only to the postcard but also to various fields.

[Brief description of drawings]

FIG. 1 and FIG. 2 are front views showing an embodiment of a confidentiality document using the same color-forming ink in a different mode. 10… Postcard, 12… Amount column

Claims (1)

[Scope of utility model registration request] 1. A confidential document in which characters, numbers, etc. are described by a reversible thermosensitive coloring ink capable of repeating coloring and erasing only by controlling heat energy.