JPS63262661A - Copying image forming method - Google Patents

Abstract

PURPOSE:To obtain a copy image having a stereoscopic sense by superposing arbitrarily an original and a light transmissive sheet on which an original image has been formed by a white or hypochromic toner, and furthermore, executing the copying. CONSTITUTION:A first original 1 is placed on an original placing table, a light transmissive sheet is used as transfer paper, and an electrophotographic process is executed, by which a white toner image corresponding to the first original 1 is formed on the light transmissive sheet 2. Subsequently, a second original 3 is formed by this light transmissive sheet 2 and the first original 1. When from on the first original 1, the light transmissive sheet 2 on which its original image has been formed by a white toner is shifted a little and superposed, an image of the first original is seen like a shadow of a white toner image. This second original 3 is placed on the original placing table so that the light transmissive sheet becomes an optical system direction, and the image copying is executed. In such a way, it is seen like a stereoscopic object on which only the shadow 4 has been formed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of forming a three-dimensional reproduced image using an electrophotographic copying machine.

(Prior Art and its Problems) Recent improvements in the performance of copying machines and their widespread use have been remarkable, and images that are faithful to originals can be obtained with high image quality. Moreover, not only black toner but also color toners such as red, blue, and green have been developed, and images of various colors can be easily obtained, and their uses are constantly expanding.

However, although it is possible to obtain a copy image that is faithful to the original, it is not possible to obtain a copy image that has a three-dimensional effect from a flat original. Since images with a three-dimensional effect are preferred for designs such as posters, a method of easily creating an image with a three-dimensional effect using an ordinary electrophotographic copying machine is desired.

(Object of the Invention) An object of the present invention is to provide a method for easily creating copies with a three-dimensional effect using an electrophotographic copying machine.

(Structure of the Invention) In order to achieve the above object, the present invention uses an electrophotographic copying machine to form an image corresponding to a first document on a transparent sheet using white to light colored toner, and forms a white to light colored toner image. The present invention is characterized in that the translucent sheet on which is formed and the first original are arbitrarily overlapped to form a second original, and an image corresponding to the second original is formed using colored toner.

(Example) Examples of the present invention will be described in detail below.

The copying machine used in the present invention is a commonly used copying machine and does not have any special mechanism or control means, but the developing device contains toner of each color and is constructed to be replaceable. For this reason, it is desirable that the developing device be integrated into a unit. Furthermore, it is preferable to use a multi-color developing system copier which has two developing units in the copier and each unit is filled with toner of a desired color to produce any color depending on the copying purpose or original image. used.

When carrying out the method of the present invention, for example, a developing device containing white toner is installed in a copying machine.

This will be explained in detail below using the drawings.

First, a first document (1) for which an image with a three-dimensional effect is desired is placed on a document mounting table, and a translucent sheet is used as a transfer paper. As the translucent sheet, a polyethylene terephthalate sheet or the like, which is usually used in overhead projectors, is suitably employed. By performing the electrophotographic process under these conditions, a white toner image corresponding to the first original (1) is formed on the translucent sheet (2)L. Then,
This translucent sheet (2) and the first original (1) are overlapped as shown in FIG. 1 to form a second original (3). When the translucent sheet 1-(2) on which the original image is formed with white toner is superimposed on the first original (1) with a slight shift, the image of the first original becomes the white toner image on the translucent sheet. The image that is hidden by the white toner image and protrudes from the white toner image is visible through the translucent sheet and appears like a shadow of the white toner image.

This second original (3) is placed on the original placing table with the translucent sheet facing toward the optical system. At this time, the developing device is replaced with one containing toner of the desired color, and normal white paper is used as the transfer paper. When the image of the second document is copied, the white toner forming portion receives scattered light due to the image exposure, so that the charge on the photoreceptor disappears and no toner image is formed on the copy. On the other hand, since a toner image is formed on the part of the first original that is not covered and protrudes, the resulting copy looks like a three-dimensional object with only a shadow (4) formed as shown in Figure 2. .

The degree and direction of displacement between the first original and the translucent sheet may be arbitrarily set depending on the purpose.

Since white toner is preferably used in the present invention, the white toner will be explained below.

A binder resin, a white colorant, and other compounding agents such as a charge control agent and a release agent are used to produce a white toner, and the composition is not particularly limited as long as it does not adversely affect the color tone of the toner. do not have.

The weight ratio of the white colorant and the binder resin is preferably 2 to 50 parts by weight of the white colorant to 100 parts of the binder resin.
If the amount of white colorant is less than this, the hiding power of the white toner will be insufficient and the original image behind it will be reproduced on the copy, and if the amount of white colorant is greater than this, the triboelectric charging characteristics of the toner will deteriorate. Furthermore, spent toner is also likely to occur (
This shortens the lifespan of the developer.

As the binder resin used in this toner, various resin materials conventionally known as toner binder resins for electrophotography are used. For example, polystyrene, polystyrene
Styrenic copolymers such as butadiene copolymers, styrene-acrylic copolymers, ethylene copolymers such as polyethylene, polyethylene-vinyl acetate copolymers, polyethylene-vinyl alcohol copolymers, phenolic resins, epoxy-based Resins, ruphthalate resins, polyamide resins, polyester resins, maleic acid resins, etc.

The white coloring agents used in this toner include zinc white,
Examples include titanium oxide, tin oxide, antimony white, zinc sulfide, zinc oxide, barium carbonate, clay, silica, white carbon, talc, alumina, pallite, and the like.

As the charge control agent used in this toner, a known colorless or white one is used as it does not adversely affect the color tone of the white toner. For the purpose of positive charge control, organic compounds containing basic nitrogen atoms, such as basic dyes, aminopyrine, pyrimidine compounds, polynuclear polyamine compounds, aminosilanes, or fillers surface-treated with these, are used. For the purpose of controlling negative charge, a carboxyl group-containing compound such as a metal chelate of alkyl salicylic acid is used. These charge control agents are preferably used in an amount of 1 to 10% by weight per toner.

Further, examples of the release agent used in this toner include silicone oil, low molecular weight olefin resins, and various waxes.

The white toner is obtained by melting and kneading the above components, cooling them, and then crushing and classifying the mixture. It can also be obtained by dispersing toner ingredients in a resin solution and then spray granulating the resultant.

In the present invention, light-colored toners are also suitably used depending on the purpose. A toner image corresponding to the original is formed on a transparent sheet using colored toner with a slight tint, and the image is copied by superimposing it on the first original in the same manner as described above. In the copy thus obtained, a thin toner image is formed in the portion corresponding to the light color toner image, and a copy image as shown in FIG. 3 is obtained. The character portion of the document, that is, the portion corresponding to the light color toner image, is formed with a light toner image, and the portion corresponding to the shadow is formed with a dark toner image, so that the document appears as if it were a three-dimensional object.

The density of the toner image thus formed on the light-transmitting sheet can be adjusted depending on the purpose of forming an image with a three-dimensional effect and the intended use. In addition, various colored toners and transfer paper are used for the reproduced copy image, resulting in a colorful image.

(Effects of the Invention) As explained above, according to the present invention, by further copying a document and a document image by arbitrarily overlapping translucent sheets formed with white or light-colored toner, the reproduced image has a three-dimensional effect. is now available. This made it possible to easily use electrophotographic copying machines to create designs such as posters, further expanding the range of uses for copying machines.

[Brief explanation of the drawing]

FIG. 1 is a diagram illustrating a method of creating a second original according to the present invention, and FIGS. 2 and 3 are diagrams illustrating a copy with a three-dimensional effect obtained according to the present invention. 1...First original, 2...Translucent sheet,
3...Second manuscript

Claims (1)

[Claims] An image corresponding to the first original is formed on a translucent sheet using white or light-colored toner, and the first original is arbitrarily superimposed on the translucent sheet on which the white or light-colored toner image is formed to form a second original. . A method for forming a copy image, comprising forming an image corresponding to the second document using colored toner.