JPS61179782A - Image-forming method - Google Patents

Abstract

PURPOSE:To obtain images with high quality without using any negative original, by a method wherein IR rays are transmitted through an original provided with images formed of a light-shielding materials and through an ink sheet, and an ink left on the ink sheet is transferred onto an image-receiving paper. CONSTITUTION:The original 12 comprises a base 10 and a light-shielding material 11, while the ink sheet 15 comprises a thermal recording ink 14 and a support 13. The original 12 and the ink sheet 15 are laid on each other so that the material 11 makes contact with the ink 14, the laminate is placed on a base for a flash lamp with the base 10 in contact with the flash lamp base, and is irradiated with IR rays 16, whereby the IR rays are transmitted through only the parts devoid of the material 11 to be absorbed into the ink 14, which is thereby melted and is adhered to the base 14. Next, the ink sheet 15 is laid on the image-receiving paper 17 (ordinary paper) with the ink 14 in contact with the paper 17, and the laminate is passed through heated rollers, whereby the ink 14 is transferred onto the image-receiving paper 17. Accordingly, transfer of the ink to the image-receiving paper is effected by the heated rollers, the transfer is securely performed, and clear images can be obtained.

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.

BACKGROUND OF THE INVENTION 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 example of a printer with improved performance will be described. FIG. 2 shows a conventional image forming force method. (
For example, Japanese Patent Application Laid-open No. 121792/1983). First, the second
In Figure (a), 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-melt ink 6 is applied on the surface of a support 4 are mixed with heat-melt ink. When the toner 6 and the toner 2 are stacked so as to be in contact with each other, pressed, and irradiated with infrared rays 7, the toner 2 absorbs the infrared rays 7 and generates heat, melting the heat-fusible ink 5 and adsorbing the heat-fusible ink 5. next,
In FIG. 2(b), the original 3 and the image receiving paper 8 are coated with toner 2.
The adsorbed heat-fusible ink 6 and image-receiving paper 8 are stacked so as to be in contact with each other, and when pressed and heat 9 is applied, the heat-fusible 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. This has the problem that a color original or the like 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 and does not require that the document be a negative document.

Means for Solving the Problems In order to solve the above problems, the image forming method of the present invention includes applying heat-sensitive recording ink to the surface of a document and a support on which an image is formed on the surface of a base material using a light-shielding material. 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 base material side, so that the heat-sensitive recording ink is applied to the part of the document where there is no light-shielding material. adsorbing the thermal recording ink remaining on the ink sheet, and placing an image receiving paper close to or in contact with the thermal recording ink remaining on the ink sheet;
The method comprises the step of transferring the thermal recording ink remaining on the ink sheet to 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.

Function The present invention uses the above-described configuration to allow infrared rays to pass through only the areas where there is no light shielding material, to transfer and adsorb the thermal recording ink onto the document, and to transfer the thermal recording ink remaining on the ink sheet to the image receiving paper. High-quality images can be obtained without forming the original with a photothermal conversion material and without using a negative original.

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 10 and a light shielding material 11, and an ink sheet 16 is made up of a thermosensitive 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 1o is made of plain paper, and the light shielding material 11 is made of white paint. The thermosensitive recording ink 14 is a hot-melt ink, and the support 13 is a polyethylene 1-methyl terephthalate film having a thickness of 12 .mu.m. The heat-melting ink is: Paraffin wax 60% by weight Carnauba wax 20% by weight Lake Red 2
The ink sheet 16 was made by coating the support 13 with the ink sheet 16. The original 12 and the ink sheet 16 are stacked so that the light shielding material 11 and the thermal recording ink 14 are in contact with each other, and the base material 1o is placed on the stand of a flash lamp (RISOXENOFAX FX-180, manufactured by Riso Kagaku Kogyo Co., Ltd.). When the infrared rays 16 are irradiated, the infrared rays pass through only the areas where the light shielding material 11 is not present and are absorbed by the thermal recording ink 14, and the thermal recording ink 14 melts and the base material 1 is exposed.
It was attached to 0.

Next, the ink sheet 15 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. 0 transferred to paper (Example 2) As a light-shielding material, a heat-sublimable ink was used as a heat-sensitive recording ink,
A polyester film was used as the image receiving paper, and the other parts were the same as in Example 1. 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 Example 1.2, white paint Hashimori-Yuu was used as a light shielding material.
are used, but the material is not limited to these, and any material with low infrared transmittance can be used as a light shielding material. Further, any ink that is not thermosensitive and can be released from the support by heat and transferred to 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 thermosensitive recording ink to a portion of the document that does not have a light-shielding material;
This process consists of placing an image-receiving paper close to or in contact with the thermal recording ink remaining on the sheet, and transferring the thermal recording ink remaining on the ink sheet to the image-receiving paper. It can be used even with color originals without the need for image formation, and high-quality images can be obtained using positive originals.

[Brief explanation of drawings]

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.

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 substrate side to adsorb the heat-sensitive recording ink to a portion of the document that does not have a light-shielding material; and bringing an image-receiving paper close to or in contact with the heat-sensitive recording ink remaining on the ink sheet. An image forming method comprising the steps of stacking the ink sheets so as to transfer the thermal recording ink remaining on the ink sheets to the image receiving paper. (2) The image forming method according to claim (1), characterized in that the thermal recording ink remaining on the ink sheet is transferred to image-receiving paper by irradiating infrared rays. (3) The image forming method according to claim (1), characterized in that the thermal recording ink remaining on the ink sheet is transferred to image receiving paper by applying heat. (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.