JPH01123769A - Toner image creation method - Google Patents

Abstract

PURPOSE:To eliminate a development of toner on an uneven surface and to obtain a clear image without background contamination by irradiating the surface of a photosensitive unit charged through a light transmissible shielding mask on which a character, an image, etc. are written with light to form an electrostatic latent image, and developing it with charged toner. CONSTITUTION:An electrically insulative light transmissible sheet 101 is, for example, of a polyethylene terephthalate sheet, and its surface is provided with a discharge destructive shielding conductive film 102 on which aluminum is, for example deposited. First, the sheet is moved in a direction of an arrow in a step of forming a mask made of an earth roller 104, an electrode stylus 103 and an electric signal source 105, and the film 102 is formed in a desired character or image by a discharge destruction. A photosensitive unit 110 is kept charged by a corona charger 109, and a shielding mask image is exposed by an optical system 108 on the surface of the unit with a light from a light source 107. The thus formed electrostatic latent image is developed by a toner developing unit 111, the formed toner image 112 is transferred by a normal electrophotograph on a sheet or the like, further heated and fixed.

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention creates a light-shielding mask using discharge breakdown recording or thermal transfer, and provides a simple toner image creation method using the mask. .

2. Description of the Related Art There is a desire to quickly and inexpensively print a large number of data and images that have been converted into electronic files.

One method for this purpose is to destroy the aluminum vapor-deposited film by electrical discharge destruction, create a 4-electroconductive part and a non-conductive part, and then apply charged toner in a pattern to paper, etc. by making the potential of each part different. A method of transferring and fixing images has been proposed (Tokukaku No. 59-229425).

This method makes it easy to obtain potential contrast and is suitable for high-speed, large-volume printing.

Problems to be Solved by the Invention However, in the proposed method, the surface on which the conductive film is located is roughened in order to improve writing characteristics, and in order to apply charged toner to the rough surface, a non-image forming surface is used. Toner adhered to the lined areas, degrading the image quality.

Means for Solving the Problems In order to solve the above problems, the toner image creation method of the present invention includes at least a mask creation step of writing characters, images, etc. to create a light-transmitting light-shielding mask, and a step of writing on the surface of the photoreceptor. A toner image is formed through a charging step of charging, an exposure step of shining light onto the surface of the photoreceptor through the mask to create an electrostatic latent image, and a toner image creation step of developing the electrostatic latent image with charged toner to create a toner image. I'm trying to create one.

For this reason, the surface to which the toner adheres is not uneven as in the above-described method, and toner is less likely to adhere to non-image areas, so that the image does not deteriorate.

Embodiments Hereinafter, the steps of the toner image forming method of the present invention will be explained with reference to the drawings.

The figures are process explanatory diagrams of the toner image forming method of the present invention. In the figure, 101 is an electrically insulating and transparent sheet 0
For example, there are sheets of polyethylene terephthalate. On its surface is a light-shielding conductive film 102 that can be destroyed by discharge. For example, there is a vapor-deposited film of aluminum. first,
Earth roller 104, electrode needle 103, and electric signal source 105
In the mask making step, the sheet is moved in the direction of the arrow and the non-transparent conductive film 102 is shaped into a desired character image by electric discharge destruction (mask making step). This is a translucent part created by destroying the conductive film.

A charge is previously placed on the surface of the photoreceptor 110 using a corona charger 109 (charging process), and an image of a light-shielding mask (consisting of 101 and 102) is transferred to an optical system 108 using light from a light source 107. to form an image on the surface of the photoreceptor (exposure process)
. The electrostatic latent image created in this way is transferred to a toner developer 111.
(development process).

112 is a completed toner image.

In ordinary electrophotography, this sharp image is transferred to paper or the like (transfer step) and then heated and fixed (fixing step). The transfer step and the fixing step are well-known steps for transferring a toner image onto paper, and these steps can be freely added to the present invention.

In the above description, the light-shielding mask was created by destroying a light-opaque film by electrical discharge, but the present invention is not limited to this. For example, it may be made by adhering non-transparent ink to a transparent sheet, or thermal transfer can be used.

The technique of making a light-shielding mask using discharge breakdown or thermal transfer is already a well-known technique, and the latter half of the electrophotographic process (charging process, exposure process, and development process) is also well known. However, a toner image creation process that combines these two is completely new.

Although a lens or the like is used in the explanation of the figures, it is also possible to expose the photoreceptor by bringing the mask into close contact with the photoreceptor.

Effects of the Invention The toner image creation method of the present invention includes at least a mask creation step of writing characters, images, etc. to create a light-transmitting light-shielding mask, a charging step of charging the surface of the photoreceptor, and a step of charging the surface of the photoreceptor through the mask. It consists of an exposure process in which an electrostatic latent image is created by exposing it to light, and a development process in which the electrostatic latent image is developed with charged toner to create a toner image. Because of its high quality, clear images without background stains can be obtained.

[Brief explanation of the drawing]

The figures are process explanatory diagrams of the toner image forming method of the present invention. 101... Translucent and electrically insulating sheet, 10
2... Opaque and conductive film, 103...
... Electrode needle, 104 ... Earth roller, 105
..... Electric signal source, 106 ..... Transparent part, 107 ..... Light source, 10B ..... Lens system, 109 ..... Corona charging Vessel, 110...
...Photoreceptor, 111...Developer, 112...
...Toner statue.

Claims (3)

[Claims] (1) At least a mask creation process in which a light-transmissive light-shielding mask is created by writing characters, images, etc., a charging process in which the surface of the photoconductor is charged, and an electrostatic latent image is created by shining light onto the photoconductor surface through the mask. A method for creating a toner image, which comprises an exposure step of creating a toner image, and a developing step of developing the electrostatic latent image with a charged toner to create a toner image. (2) The toner image forming method according to claim (1), characterized in that the light-shielding mask is created by discharge destruction. (3) The toner image forming method according to claim (1), characterized in that the light-shielding mask is created by thermal transfer.