JPS585290A - Copying method - Google Patents

Abstract

PURPOSE:To obtain easily a large number of copies without the use of any ink, by a method in which an image is drilled by a discharge breaking method in the film layer of a copying material having a conductive coloring layer provided on a substrate and a film layer provided on the conductive coloring layer, and the copying material so treated is pressed on a medium to be duplicated. CONSTITUTION:A conductive coloring layer consisting of a binder, a conductive substance, and a coloring agent on a substrate, e.g., paper or polyvinyl chloride film, in an amount of 30-130g/m<2>. The binder used includes various waxes, fatty acid amide compounds, e.g., stearamide, etc., and the conductive substance used includes carbon black, metal powders, etc., giving a surface specific resistivity of 10<2>-10<5> ohm preferably. Then, on the conductive coloring layer, a plastic film layer in an amount of 0.5-10g/m<2> is provided. An electric signal corresponding to an image is applied to the film layer of the copying material thus obtained to form a drilled image, and a sheet of paper, etc., is pressure contacted with the drilled image portion for copying.

Description

[Detailed description of the invention] The present invention relates to a novel copying method.

2. Description of the Related Art Conventionally, a method has been used in which an image is perforated in an electronic recording copying paper by electric discharge, and ink is supplied through the perforation to copy the image onto a copying material. Since this method uses ink, it has the disadvantage of staining hands and equipment.The present invention aims to provide a complete method for easily obtaining more than ten copies without staining hands and equipment. Using a copying material on which a conductive colored layer is applied and a film layer that is destroyed by discharge on it, an image is perforated in the film layer by discharge destruction, and this is pressed against the material to be copied. This is a copying method characterized by transferring a conductive colored layer to a copying material through perforations.

The substrate used in the present invention generally has a thickness of 30 to 130 f.
ed paper, polyvinyl chloride, polyester, polyethylene, polypropylene, polyvinyl acetate, polyvinylidene chloride, polyacrylonitrile, polystyrene or acetic acid cellulose, and the like are used.

The conductive colored layer uses a binder, a conductivity imparting agent, and a coloring material. Binders include various waxes (beeswax, carnauba wax, montan wax, paraffin wax, polyethylene wax, halogenated hydrocarbon wax, etc.), stearamide, lyrunamide, uralilnamide, myristylamide, hydrogenated bovine fatty acid amide,
Plasticizing fatty acid amide compounds such as palmitamide, oleic acid amide, rice sugar fatty acid amide, coconut oil amide or methylolated products of these fatty acid amides, methylene bis stearamide, ethylene bis stearamide, natural and artificial oils. A mixture containing all agents, activators, wetting agents, etc. is used. For example, when polyethylene wax with a melting point of about 100°C is mixed with hardened beef tallow oil with a melting point of about 45°C in an amount of 50% of the wax, the melting point is about 70°C.

As the conductivity imparting agent, carbon blank or copper, iron,
Metal powders such as aluminum and silver, and graphite 4
Among these, carbon black □ and graphite are preferred, and they also serve as a coloring agent. These are preferably used so that the surface electrical resistivity is 10 2 to 10 5 Ω.

Various pigments and dyes are used as colorants. This does not necessarily have to be used when the above-mentioned carbon blank or bluff eye strainer is used.

A film layer that is destroyed by electrical discharge can be obtained by applying a solution of various plastics to a conductive colored layer and drying it. The adhesion amount is preferably 05 to 10 V/-, and particularly good is 08 to 1.5 V/-. If the adhesion amount is less than 0.55'/-, the color of the non-perforated part of the conductive colored layer will be transferred to the copying material, causing background stains.
If the size is larger, the colored layer in the perforated portion may be difficult to transfer, or an unnecessarily large voltage may be required to form the perforation. A white pigment may be added to this film layer for the purpose of facilitating discharge or making the image after perforation easier to see. White pigments include znO1TIO2, calcium carbonate, silica, clay, talc, pallite powder, barium sulfate, barium carbonate, gypsum, alumina white,
Sachin Shiro, Litopon, etc. are used, and the amount of addition is preferably 2 parts or less per 1 plastic solid content. All alternating current electric signals corresponding to the signals corresponding to the original image are applied to the stylus that moves automatically, and the stylus is brought into contact with the surface of the master.

At this time, the voltage measured with an AC voltmeter is 50 to 500V. As a result, the portion of the film on the surface of the master corresponding to the image portion is perforated in accordance with the original image.

Next, when a material to be copied, such as paper, is brought into contact with the perforated portion and pressure is applied, the conductive colored layer comes into direct contact with the paper through the perforated portion, and an image corresponding to the original image is copied onto the paper. During this copying, when heated to around the flow temperature of the conductive colored layer,
A high-density image can be obtained.

As can be seen from the above process, the punched image must be created so that the left and right sides of the original image are reversed.

Next, an example will be given and explained.

Example 1 Acetylene blank 35'r petroleum oil
409 Parafine wax 252 Disperse the above with a kneading roll, heat it to 120℃ and make it 86
The amount of adhesion after cooling on f//d high-quality paper is 15 f/? P
lj to form a conductive colored layer. At this time, the surface specific resistance li was 1.0×10 3 Ω.

Next, a 1 wt % acrylic resin toluene solution was applied thereon so that the amount of adhesion after drying was 1.2 f/d to form the entire film layer. This was made into a plate using a mimeograph machine (Ricoh Hifax F-550, manufactured by Ricoh),
When paper was stacked and passed between two rubber rolls at a pressure of 5 kg/cm, the image density of the first sheet was 1.13.1.
A fifth copy image with a value of 0.60 was obtained.

Next, when a current was applied to the heater in the rubber roll to bring the surface temperature of the rubber roll to 80°C, the image density on the 16th sheet was 1. Example 2 Acetylene plaque 30f Petroleum oil 20% Vegetable oil 202 Sorbitan fatty acid ester 302 or more were dispersed with a kneading roll, and this was spread on high-quality paper at 15%. /rr? A conductive colored layer was formed. The surface specific resistance at this time was 4.5×10 3 Ω.

Next, on top of that, polyvinyl acetate 109 ZnO10? A toluene 1002 dispersion was applied to form a film layer with a dry coating weight of 2.0.

When copying was carried out in the same manner as in Example 1 using the copy material thus prepared, the image density of the first sheet was 1.20.1.
The fifth one was 0.83.

In the above examples, petroleum oils include olefin polymers such as spindle oil, dynamo oil, turbine oil, machine oil, and cylinder oil, condensates of chlorinated paraffins and aromatics, carboxylic acid esters, and phosphoric acid. Ester, silicate ester, silicone oil, polyalkylene glycol, etc. were used as appropriate.

The present invention is as described above, and is useful as a simple copying method that does not stain hands and fingers.

Patent applicant Ricoh Co., Ltd. Representative Patent Attorney Hidetake Komatsu

Claims (1)

[Claims] 1. Using a copying material in which a conductive colored layer is applied on a substrate and a film layer that is destroyed by electrical discharge is formed on it, an image is perforated in the film layer by electrical discharge destruction, and this is pressed against the material to be copied. . A copying method characterized in that the conductive colored layer is transferred to the object to be copied through perforations.