JPH01264363A - Method for recording still picture - Google Patents

Abstract

PURPOSE:To easily keep the privacy of communication contents by setting the surface of recording paper at the same color tone as that of ink for recording, etc., by using the ink or the like whose color can be changed as the ink for recording. CONSTITUTION:As the coloring agent of a toner, temperature indicating ink, hidden ink, or an indicator or the like is used. It is desirable to set the color of the recording paper at the same color as that of the toner. Thereby, it is almost impossible to read an image even when the image is fixed by the toner. Next, the image can be revealed by applying two-dimensional processing on the image. For example, in case of using the temperature indication ink, it is possible to read the image by changing the color of the ink immediately by sticking the recording paper on a panel plate heated up to a color changing temperature, and also, it is hard to read the image by separating the recording paper from the panel, In other words, communication can be received by a facsimile of electrostatic recording system by using the above toner on electrostatic recording paper. Next, by sticking the recording paper on a metallic panel plate heated to a certain temperature by an internal heating plate, a communication text is changed to a red color, then, it can be read. When the recording paper is separated from the panel plate, it is hard to read the image again.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for recording still images transmitted using radio waves on a receiving side.

[Conventional technology]

Traditionally, recording devices have been used to convert a still image into radio waves, transmit them using an appropriate method, and then use various methods to convert the received radio waves on the receiving side into the original still image on the surface of recording paper. It is widely known as a so-called facsimile. In a facsimile, radio wave signals sent as dots and lines are assembled into the original still image inside the receiver, recorded on recording paper, and retrieved. Therefore, by looking at the recording paper, one can immediately know the still image that became the manuscript. This is extremely convenient. Therefore, today, facsimile machines are used in a large number of companies. However, there is a problem here.

In many cases, a facsimile machine is installed in a corner of an office or other easily visible place, just like ordinary office equipment that is used on a daily basis, and the transmitted signal content can easily be seen by a third party. This is because it can be detected. However, depending on the content of the transmission, it may be necessary to maintain confidentiality. This necessity often arises especially in companies that place emphasis on information activities. However, current facsimile machines are completely unprotected when it comes to maintaining confidentiality and have many inconveniences, and there has been a strong desire to improve this point.

[Problem to be solved by the invention]

The present invention has been made to correct the above-mentioned drawbacks and to meet the demands, and its object is to maintain the high-speed communication performance and convenience of facsimile, while reducing the amount of communication content received. By providing a receiving method that facilitates confidentiality, the purpose is to increase the usage of facsimile and contribute to the development of industry.

[Means to solve the problem]

The present invention is a facsimile machine that sends still images using radio waves and records them on recording paper in a receiver. The received image is difficult to distinguish, and the recording paper is then processed by an appropriate method outside the receiver to make the received image clearly visible on the surface of the recording paper. This is a method of recording characteristic still images.

According to the present invention, since the image on the recording paper that is sent out is at least difficult to read, it is possible to maintain secrecy, and since it is easy to restore, If the person restores the data under confidentiality, the secret can be maintained.

In the present invention, the means for making the received image at least difficult to read is by adjusting the color tone of the recording ink etc. and the color tone of the surface of the recording paper when fixing the image on the recording paper surface after receiving the transmission. It is to be.

In this way, the recorded image can be made at least difficult to read.

Next, in order to read the received image, the recording paper is subjected to secondary processing outside the receiver to change only the color tone of the recording ink or the like. In this way, the received image becomes clearly visible due to the discolored ink or the like on the paper surface. The secondary treatment is usually carried out using simple methods such as thermal treatment, ultraviolet treatment, chemical treatment, etc., and can be easily carried out under confidential conditions.

In the present invention, as described above, color-changeable inks are used as recording inks and the like. Among these, there are many inks that change color when subjected to thermal treatment, but finger-warming inks and the like are suitable. Commercially available products include Daithermo (manufactured by Dainichiseika Kogyo Co., Ltd.) and Metamocolor (manufactured by Pilot Ink Co., Ltd.). Some of these inks undergo discoloration reversibly and others irreversibly upon heat treatment, but reversible inks are preferred.

This is because the image disappears when heating is stopped, making it easy to maintain confidentiality. Next, there are so-called hidden inks (BL ink manufactured by Jujo Kako Co., Ltd.) that change color due to ultraviolet rays. When exposed to an ultraviolet lamp (commonly known as a black lamp), it emits fluorescence, allowing the image to be read. Many of these inks are transparent or nearly white when applied, making them easy to use. There are many types of substances that change color through chemical treatment, but indicators that change color with acid or alkali (such as phenolphthalein) can be changed in color by alternating the use of acid and alkali. Cobalt compounds can also change color depending on moisture.

As mentioned above, although the present invention employs a special recording method, there is no need to use a dedicated facsimile.
This purpose can be achieved by using a conventional facsimile machine and applying the above-mentioned means to recording paper and other materials. However, since current facsimile machines employ various methods for recording images, the format of the recording paper is changed accordingly.

The facsimile image recording method and the preparation of recording paper corresponding thereto will be described below.

There is a method called electrostatic recording method in commercially available facsimiles. In this method, an electrostatic latent image is formed by discharging an electrically transmitted image from a recording needle, and colored toner is then deposited thereon and fixed by heat or pressure to form an image. In the present invention, the above-mentioned finger warm ink, hidden ink, and indicator are used as the coloring agent of the toner. Also, use the same color recording paper as the toner. In this way, even if the image is fixed with toner, it is almost impossible to read. Therefore, this is processed secondarily to make an image appear. For example, when using finger-heated ink, if you paste the recording paper onto a panel board that has been heated to the discoloration temperature, the ink will immediately change color and the image can be read, and if you remove it from the panel, it will become difficult to read. can. It is convenient to use a metal plate with a built-in heating element as the heating panel. However, an ink with a high discoloration temperature is inconvenient, and it is preferable to use an ink that discolors at about 30 to 60°C. This dot hiding ink can be easily revealed by irradiating it with a black lamp. Furthermore, the indicator becomes legible when treated with acid or alkali, but it must be treated again to erase the image.

Next, the discharge destruction recording method of commercially available facsimiles is a method in which the white pigment layer on the surface of the recording paper is destroyed by discharge during reception, and the underlying carbon layer is exposed and recorded. In the present invention, for example, a layer of the above-mentioned finger temperature ink, hidden ink, indicator, etc. may be provided under the surface white pigment layer, and the surface white pigment layer may also be colored in the same color as these ink layers. Use printed recording paper. In this way, the image exposed by the destruction is difficult to read, but if it is subjected to secondary processing, it can be read.

Furthermore, the heat-sensitive recording method and pressure-sensitive recording method of commercially available facsimile machines can also be used. In the thermal recording method, the opaque layer provided on the surface of the recording paper is thermally destroyed to reveal the underlying colored layer for recording, but in the present invention, the underlying colored layer is Ink that changes color through secondary processing is used, and the surface layer only needs to be paper with the same color as the primary color of the ink.For pressure-sensitive recording, the principle is the same as that of carbon copying paper and non-carbon copying paper. Since recording is performed by developing color using pressure, in this case too, recording paper can be made in the same way by using the above ink for the coloring layer and matching the color of the surface paper to the coloring layer.

Furthermore, there is also an ink jet method on the market that records by ejecting liquid ink from pores. In this case as well, recording paper can be made in the same way by using the same ink as above and adjusting the color of the paper.

〔Example〕

Hereinafter, the present invention will be specifically explained with reference to Examples.

Example 1 15% powder of Daithermo PR40 (Dainichiseika Kogyo Co., Ltd.),
A toner is made by mixing 85% polystyrene powder. Since this toner exhibits an orange color, electrostatic recording paper with an orange color is made. The above-mentioned toner is used on this recording paper to receive communications by electrostatic recording facsimile. The message on the received recording paper is difficult to read. Therefore, by attaching recording paper to a metal panel plate that was kept at 43°C by an internal heat generating plate, the message turned red and became readable. It was again difficult to remove this recording paper from the panel board. Furthermore, this panel board was easy to carry and could be used by connecting it to a household power source, so it was possible to read the correspondence under confidential conditions.

Example 2 A toner was prepared in the same manner as in Example 1, using a hidden ink powder (Jujo Kako Co., Ltd. BL Ink) instead of the dithermo ink. Since this toner is gray, gray paper is used as the recording paper. Even if received on this recording paper in the same manner as in the first embodiment, the text cannot be read.

When this recording paper was placed under a black lamp, the text fluoresced and became readable.

Some black lamps are made into desk lamps, so they can be read inside the secret room.

〔Effect of the invention〕

As described above, according to the present invention, by using the recording paper according to the present invention in a conventional facsimile machine, the communication sent from the receiver is difficult to read, but this communication can be used as a secondary facsimile machine. If processed, it will become easier to read and maintain confidentiality, which will greatly increase the use of facsimile in the information industry and contribute to the development of the industry.

Claims (1)

[Claims] In a facsimile machine that sends a still image using radio waves and records it on recording paper in the receiver, when the recording paper is automatically sent out from the receiver, the image received on the recording paper is It is in a state where it is difficult to distinguish, and then the recording paper is secondarily processed by an appropriate method outside the receiver to make the received image clearly visible on the surface of the recording paper. How to record still images.