JPS61181688A - Image formation - Google Patents

Abstract

PURPOSE:To obtain high-quality images by a method in which a manuscript having an image formed through a light shield on the surface of its base material is put on an ink sheet having a thermal recording ink coated on the surface of its supporter and pressed, and infrared rays are irradiated to the portions where the light shield is not present to transfer the ink adsorbed on the manuscript to an image receiving paper. CONSTITUTION:A manuscript 12, consisting of a base material 10 and a light shield 11, is put on an ink sheet 15, consisting of a thermal recording ink 14 and a supporter 13, in such a way as to make the material 11 contact with the ink 14. Infrared rays 16 are irradiated to the portions where the light shield 11 is not present, and the ink 14 is melted by absorbing the rays 16 and adhered to the material 10. The manuscript 12 is then superposed so as to contact the ink 14 with an image receiving paper 17 and heated 18 to transfer the ink 14 to the paper 17. By transferring the ink 14 to the paper 17 by heat 18, the transfer can be exactly made to obtain clear images.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an image forming method that can be used in a recording device that converts an electrical signal into a visible image and records it on a recording medium.

Conventional technology In recent years, with the spread of office automation, there has been a growing demand for recording devices that convert electrical signals into visible images, so-called printers. An image forming method has been proposed.

An example of a conventional image forming method will be described below with reference to the drawings. FIG. 2 shows a conventional image forming method. (For example, JP-A-66-121792)
. First, in FIG. 2 B, a document 3 on which an image is formed with toner 2 on the surface of a base material 1 and an ink sheet 6 on which a heat-melting ink 6 is applied on the surface of a support 40 are mixed with heat-melting ink 5. Stack and press so that the toner 2 is in contact with the toner 2, and infrared ray 7
When the toner 2 is irradiated with infrared rays 7, the toner 2 absorbs the infrared rays 7, generates heat, melts the thermofusible ink 5, and adsorbs the thermofusible ink 5. Next, in FIG. 2, the original 3 and the image receiving paper 8 are stacked so that the heat-fusible ink 5 to which the toner 2 has been adsorbed is in contact with the image-receiving paper 8, and when pressed and heat 9 is applied, the heat-fusible ink is The ink 5 is melted and transferred to the image receiving paper 8.

Problems to be Solved by the Invention However, with the above configuration, since the material that forms the image on the original is a photothermal conversion material that absorbs infrared rays and generates heat, the efficiency of conversion from infrared rays to heat, such as black, is very high. The problem is that color originals cannot be used.

The present invention provides an image forming method that does not require a photothermal conversion material to form an image on a document.

Means for Solving the Problems In order to solve the above-mentioned problems, the image forming method of the present invention includes a document having an image formed on the surface of the base material with a light-shielding material, and a heat-sensitive recording ink applied to the surface of the support. The ink sheets are stacked and pressed so that the light shielding material and the heat-sensitive recording ink are in close proximity to or in contact with each other, and infrared rays are irradiated from the particle base side to apply the heat-sensitive recording ink to the part of the manuscript where there is no light shielding material. This process consists of a step of adsorbing the thermal recording ink to the document, and a step of stacking an image-receiving paper close to or in contact with the thermal recording ink adsorbed to the original, and transferring the thermal recording ink adsorbed to the document onto the image-receiving paper. Here, the term "thermal recording ink" refers to an ink that can be released from a support by heat and transferred to image-receiving paper. Furthermore, the light shielding material is a substance that has low transmittance to infrared rays.

Effects of the present invention With the above-described structure, infrared rays are transmitted only in the areas where there is no light-shielding material, the thermal recording ink is transferred and adsorbed onto the original, and the thermal recording ink adsorbed on the original is transferred onto image receiving paper, thereby printing the original. High quality images can be obtained without using photothermal conversion materials.

EXAMPLE An example of the image forming method of the present invention will be described below.

FIG. 1 is a sectional view showing an embodiment of the present invention.

In FIG. 1, a document 12 is made up of a base material 1o and a light shielding material 11, and an ink sheet 15 is made up of a heat-sensitive recording ink 14 and a support 13. 17 is image receiving paper, 16 is infrared rays, 18
is infrared rays or heat.

Example 1 In the original 12, the base material 10 is plain paper, and the light shielding material 11 is made of white paint. The thermosensitive recording ink 14 is a heat-melting ink, and the support 13 is a polyester terephthalate film having a thickness of 12 μm. The heat-melting ink is: Paraffin wax 60% by weight Carnauba wax 20% by weight Lake Red 2
The ink sheet 15 was prepared by coating the ink sheet 9 with 0% by weight on the support 13. The original 12 and the ink sheet 15 are stacked so that the light shielding material 11 and the heat-sensitive recording ink 14 are in contact with each other, and a flash lamp (manufactured by Riso Italic Industries) is used.
When the base material 10 is placed in contact with the stand of the SOXENOFAX FX-180) and irradiated with infrared rays 16, the infrared rays are transmitted only in the areas where the light shielding material 11 is not present and are absorbed by the thermal recording ink 16. 14 is melted and the base material 1o
It was attached to.

Next, the original 12 and image-receiving paper 17 (plain paper) are stacked so that the thermal recording ink 14 is in contact with the image-receiving paper 17, and when passed through a heat roller (surface temperature 90'C), the thermal recording ink 14 is transferred to the image-receiving paper. transcribed into.

According to this embodiment, since the heat-melting ink is transferred to the image-receiving paper using a hot roller, the transfer to the image-receiving paper is reliably performed and a clear image can be obtained.

Example 2 The other parts were the same as in Example 1 except that a heat-sublimable ink was used as the heat-sensitive recording ink and a polyester film was used as the image-receiving paper. Thermal sublimation ink is made by coating a polyester film as a support with an anthraquinone disperse dye and ethyl cellulose as a binder. The image forming process was the same as in Example 1, but the temperature of the heated roller was 170'C.

According to this example, by using heat-sublimable ink,
It is possible to form thinner patterns than with hot-melt ink.

In Examples 1 and 2, white paint is used as the light shielding material, but the material is not limited to these, and any material with low transmittance of infrared rays can be used as the light shielding material. Further, as the heat-sensitive recording ink, heat-melting ink or heat-sublimation ink is used, but the ink is not limited to these, and any ink that can be released from the support by heat and transferred to the image-receiving paper may be used. .

Effects of the Invention As described above, the present invention combines an original on which an image is formed with a light-shielding material on the surface of a base material and an ink sheet on which a heat-sensitive recording ink is coated on the surface of a support with the light-shielding material and the heat-sensitive recording ink. stacking and pressing so that they are close to each other or in contact with each other, irradiating infrared rays from the base material side, and adsorbing the thermal recording ink to a portion of the document that does not have a light-shielding material; This process consists of stacking image-receiving paper close to or in contact with the original, and transferring the thermal recording ink adsorbed to the original onto the image-receiving paper.There is no need to form an image on the original with a photothermal conversion material, and color recording is possible. It can be used even with originals, and high-quality images can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional image forming method. 1o... Base material, 11... Light shielding material, 14
...Thermosensitive recording ink, 13 ... Support, 17 ... Image receiving paper.

Claims (5)

[Claims] (1) A document on which an image is formed with a light-shielding material on the surface of a base material and an ink sheet on which a heat-sensitive recording ink is applied on the surface of a support are stacked so that the light-shielding material and the heat-sensitive recording ink are in close proximity or in contact with each other. , pressing and irradiating infrared rays from the base material side to make the heat-sensitive recording ink stick to a portion of the document where there is no light-shielding material; and bringing an image-receiving paper close to or in contact with the heat-sensitive recording ink adsorbed to the document. An image forming method comprising the steps of stacking the originals in such a manner as to transfer the thermal recording ink adsorbed to the originals onto the image-receiving paper. (2) The image forming method according to claim (1), characterized in that the thermal recording ink adsorbed on the document is transferred to image-receiving paper by irradiating infrared rays. (3) Claim No. 1 characterized in that the thermal recording ink adsorbed to the document is transferred to the image receiving paper by applying heat.
) The image forming method described in section 2. (4) The image forming method according to claim (1), wherein the heat-sensitive recording ink is a heat-melting ink. (5) The image forming method according to claim (1), wherein the heat-sensitive recording ink is a heat-sublimable ink.