JPS62127782A - Picture recorder - Google Patents

Abstract

PURPOSE:To output a clear picture by providing a removing means removing a toner to a photoconductive layer side. CONSTITUTION:At the side of a transparent substrate 1-3 of a non-edge shape photosensitive body 1 composed of the transparent substrate 1-3, a transparent conductive layer 1-2 and a photoconductive layer 1-1, a removing means 20 to remove a toner is provided. For the removing means 20, a cloth-made cleaner, a fur brush, a blade, a sponge, a rotating fur brush, etc., are used. The dispersion toner on the transparent substrate 1-3 at the inside of the photosensitive body 1 is removed by a removing means and the reduction of the picture quality is prevented.

Description

[Detailed Description of the Invention] [Summary] An image recording device includes an endless photoreceptor consisting of a transparent substrate, a transparent conductive layer, and a photoconductive layer, an image exposure means on the side of the transparent substrate, and a toner on the side of the photoconductive layer. A removing means for removing toner is provided on the photoconductive layer side, and the toner is removed, thereby making it possible to output a clear image.

[Industrial application field]

The present invention relates to an image recording apparatus, and particularly to an electrophotographic image recording apparatus that performs image exposure from the transparent substrate side of a photoreceptor.

Image recording devices are widely used as output devices in fields such as information processing. As this image recording apparatus, the electrophotographic process unit, Carlson process, is known.

This Carlson process uses a photoreceptor as a recording medium, uniformly charges the photoreceptor, performs image exposure, develops,
This method records images by repeating the steps of transfer, fixing, neutralization, and cleaning.

However, since the image recording apparatus to which the above-mentioned electrophotographic process method is applied is large in size, there is a demand for an image recording apparatus that can be downsized and can produce clear images.

[Conventional technology]

FIG. 2 is a schematic diagram of the main parts of a conventional image recording apparatus, in which the photoreceptor 1 is constructed in the shape of an endless belt and rotates in the direction of the arrow. Further, the photoreceptor 1 has a transparent substrate 1-3 on the inside, a transparent conductive layer 1-2 on the outside, and a photoconductive film-1 on the outermost side. This transparent conductive layer 1-2 is grounded. The magnetic brush developing device 2-1 of the developing device 2 has a volume resistivity value of 10'-1.
0'! It is filled with conductive magnetic toner of Q cm.

This image exposure device 4 is an optical device consisting of a laser or an LED array.

The image recording procedure will be explained below. Magnetic brush developing machine 2-1
When the image exposure device 4 performs exposure based on the image pattern data while a developing bias is applied by the power source 3, the photocarriers generated in the photoconductor 1-1 of the photoreceptor 1 move toward the surface. A latent image charge 6 is formed. The toner having the opposite polarity to the latent image charge 6 is transferred to the magnetic brush developing device 2-
1 and adheres to the photoreceptor 1 to form a toner image 5.

At this time, a magnetic brush developing device 2 is also applied to the non-exposed portion of the photoreceptor 1.
An electric field between the transparent conductive layer 1-1 and the transparent conductive layer 1-2 acts to cause the toner 7 to adhere. This excess toner 7 is collected by a magnetic brush developing machine 2-2 having a ground potential.

The remaining toner 8 is transferred onto the recording paper 9 using a transfer roller 10 having an opposite potential due to the electric current a11.

The transferred toner 12 is fixed by a fixing device 13 to obtain a recorded image 14.

On the other hand, the toner 15 remaining on the photoreceptor 1 after the transfer has its charge and latent image charge removed by the charge removal light source 16, and is collected by the magnetic brush developing device 2-1.

However, the toner is stored in the magnetic brush developing machines 2-1 and 2.
Since the toner is conveyed at high speed at -2, the toner scatters and adheres to the transparent substrate 1-3 inside the photoreceptor 1. The adhered toner blocks the neutralizing light and the exposure light, resulting in a decrease in light transmittance, resulting in nonuniform image shading, defects, and a decrease in print density.

[Problem that the invention seeks to solve]

Conventional image recording apparatuses have had the disadvantage that scattered toner adheres to the photoreceptor, degrading image quality.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional situation, it is an object of the present invention to provide an image recording apparatus that is suitable for miniaturization and does not impede image quality.

[Means for solving problems]

In the present invention, as shown in FIG. 1, toner is removed from the side of the transparent substrate 1-3 of the endless photoreceptor 1 consisting of the transparent substrate 1-3, the transparent conductive layer 1-2, and the photoconductive layer N1-1. Removal means 2
0 is set.

[Effect]

The scattered toner on the transparent substrate 1-3 inside the photoreceptor 1 is removed by the removing means, thereby preventing deterioration of image quality.

〔Example〕

FIG. 1 is a schematic diagram of an embodiment of an image recording apparatus according to the present invention, and the same parts as in FIG. 2 are denoted by the same reference numerals, and their explanations are omitted. The different parts of the present invention are magnetic brush developing machine 2-
1. A means 20 is provided for removing the toner scattered from 2-2 and attached to the back surface of the photoreceptor 1, that is, the transparent substrate 1-3. This removing means 20 uses a cloth cleaner, a fur brush, a blade, a sponge, a rotating fur brush, or the like.

Although the above explanation has been made with respect to an electrophotographic image recording apparatus, it goes without saying that there will be no problem in applying the present invention to an image recording apparatus that has a transparent substrate and performs exposure from the side of the transparent substrate.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, the toner scattered on the photoreceptor is removed, the image quality is improved, and an extremely beneficial effect is achieved.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of an embodiment of an image recording apparatus according to the present invention, and FIG. 2 is a schematic diagram of main parts of a conventional image recording apparatus. In the figure, 1 is a photoreceptor, 1-1 is a photoconductive layer, 1-2 is a transparent conductive layer, 1-3 is a transparent substrate, 2 is a developing device, and 4' is a photoreceptor. Miscellaneous Jt+Seki2m@1 Figure

Claims (1)

[Claims] The transparent substrate (1-3) of an endless photoreceptor (1) comprising a transparent substrate (1-3), a transparent conductive layer (1-2), and a photoconductive layer (1-1). In an image recording apparatus comprising an image exposing means (4) on the side of the photoconductive layer (1-1) and a toner developing means (2) on the side of the photoconductive layer (1-1), An image recording apparatus characterized in that a removing means (20) for removing toner is provided.