JPH0391732A - Image recordor - Google Patents

Abstract

PURPOSE:To provide an image recording device which can output a color image without little color slurring by providing a sheet state monochrome image carrier which can travel synchronized with the outer circumference of a photosensitive body. CONSTITUTION:A latent image based on a picture information from a laser scanner unit 3 is formed on the photosensitive drum 1 which is uniformly electrified, and the toner image is formed by a developing device 4 in a part where the photosensitive body drum 1 and a transparent belt 5 are layered. A latent image is formed on the photosensitive and pressure sensitive paper 9 of that toner image by an exposing unit 16. Color latent images are formed on the photosensitive and pressure sensitive paper 9 by sequencially carrying out exposure with red light, green light, and blue light utilizing filter 20. After that, by layering together and pressure developing a visual color paper 10 fed from a cassetted 14 and the photosensitive and pressure sensitive paper 9 by a pressure developing device 11, the color image is formed on the visual color paper and the paper is ejected to a paper ejecting tray 15. The used photosensitive and pressure sensitive paper 9 is wound up by a winding up roll 13.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image recording apparatus that records predetermined image information on photosensitive paper.

[Prior Art] Conventionally, as a prior art of this type of image recording apparatus, there is Japanese Patent Application No. 105843/1983.

Based on the image information, this device creates a light-shielding original mask on a cut sheet in the monochrome printer section, performs contact transmission color separation exposure on light-sensitive pressure-sensitive paper, creates a latent image on the light-sensitive pressure-sensitive paper, and then creates a latent image on the light-sensitive pressure-sensitive paper. By overlapping and applying pressure, a color image is formed on the developing paper.

[Problems to be Solved by the Invention] However, in order to align a cut sheet-shaped mask original created in a monochrome printer section to a specific position on photosensitive pressure-sensitive paper and perform contact exposure, highly accurate alignment is required. A means and a circuit to control it are required. Also,
When using a laser printer as a monochrome printer, when transferring the toner image on the photosensitive drum to the cut sheet,
There was a problem in that the printing pitch of each sheet of the mask original plate was slightly shifted, resulting in color shift on the color image even if it was accurately aligned to a specific position on the photosensitive pressure sensitive paper.

The present invention has been made to solve the above-mentioned problems, and involves wrapping a part of a sheet-like monochrome image bearing member around the outer periphery of a cylindrical photoreceptor, and synchronously wrapping the sheet-like monochrome image bearing member around the outer periphery of the photoreceptor. To provide an image recording device which eliminates the need for a highly accurate positioning means by being configured to move in the same direction, and which can output a color image with less color shift by eliminating pitch shift during transfer to paper. The purpose is to

[Means for Solving the Problems] In order to achieve this object, the image recording device of the present invention includes a cylindrical photoreceptor, a part of which is attached to the outer periphery of the photoreceptor, and a It consists of a sheet-shaped monochrome image carrier that can move in synchronization with the outer circumference of the photoreceptor.

[Operation] In the present invention having the above structure, a uniformly charged cylindrical photoreceptor is exposed to light based on image information to form an electrostatic latent image on the photoreceptor. Thereafter, toner is applied to the electrostatic latent image using a developer at a portion where the sheet-like image carrier is wrapped around the outer periphery of the cylindrical photoreceptor. Thereafter, the sheet-like image carrier is separated from the cylindrical photoreceptor, and color separation exposure is performed on the photosensitive paper using optical means at a predetermined position. The above steps are repeated three times for each color to form a color image on the photosensitive paper.

[Example] Hereinafter, an example embodying the present invention will be described with reference to the drawings.

First, the overall structure will be explained with reference to FIG.

A photoconductor drum 1 having photoconductivity such as OPC, a charger 2 for uniformly charging the surface of the photoconductor drum 1, and a charger 2 for exposing the uniformly charged photoconductor drum 1 to light based on image information. a laser scanner unit 3 for developing the electrostatic latent image on the photoreceptor drum 1, a developer 4 for developing the electrostatic latent image on the photoreceptor drum 1 with toner, and a transparent belt that is wound around the photoreceptor drum 1 about half a turn and moves in synchronization with the outer circumference of the photoreceptor drum 1. 5 and a tension roller 6 rotatably attached to the opposite side of the photoreceptor drum 1.
There is also an erase lamp 7 for erasing the latent image after development. The developing unit 4 is attached to perform development at a location where the photosensitive drum 1 and the transparent belt 5 overlap, and a cleaner for collecting toner on the transparent belt 5 is attached to the tension roller 6 side. A light-sensitive pressure-sensitive paper 9 that forms a color latent image according to the wavelength of the light-sensitive pressure-sensitive paper 9;
A pressure developing device 11 that performs pressure development, a cartridge 12 that stores the photosensitive and pressure sensitive paper 9, a winding roll 13 that winds up the used photosensitive and pressure sensitive paper 9, a cassette 14 that stores the color developer paper 10, and a color. The image is output from the paper output tray 15 and the like.

Further, there is an exposure unit 16 for exposing the toner image on the transparent belt 5 onto the photosensitive pressure sensitive paper 9.

The exposure unit 16 includes a reflecting mirror 17 and a halogen lamp 18.
, one self-cleaning lens array (hereinafter referred to as SLA), and a filter 20.

Next, the action will be explained. A latent image based on image information is formed on the uniformly charged photoreceptor drum 1 by a laser scanner unit 3, and a toner image is formed by a developer 4 at the overlapped portion of the photoreceptor drum 1 and transparent belt 5. The exposure unit 16 forms a latent image on the photosensitive pressure sensitive paper 9 using the toner image.

At this time, first, a toner image is created where cyan should be developed, and during exposure, the transparent belt 5 moves in the direction of the arrow, and the photosensitive and pressure sensitive paper 9 also moves to the right during exposure. After the exposure to the red light is completed, the light-sensitive and pressure-sensitive paper 9 returns to the left to the position before exposure.
Similarly, exposure is performed with green light and blue light, and a color latent image is formed on the photosensitive pressure sensitive paper 9. Thereafter, the developer paper 10 fed from the cassette 14 and the photosensitive pressure-sensitive paper 9 are superimposed and developed under pressure by the pressure developer 11 to form a color image on the developer paper, and the paper output tray 1
The paper is ejected to 5. The used photosensitive pressure sensitive paper 9 is wound onto a winding roll 13.

Although one embodiment of the present invention has been described above, the image recording apparatus of the present invention is not limited to application as a printer, and instead of the laser scanner unit 3, a reflective color separation exposure optical system such as an analog copying machine can be used. By using this system, it is also possible to apply it as a copying machine.

It is also possible to configure the exposure unit as shown in FIG. 2 with a reflecting mirror 21, halogen lamp 22, SLA 23, and filter 24, and use the reflected light of the toner image on the white belt 25.

Moreover, it is also possible to use an LED array, a liquid crystal shutter, etc. in place of the laser scanner unit 3.

[Effects of the Invention] As is clear from the detailed description above, according to the present invention, it is no longer necessary to transfer toner to cut paper as in the prior art, and the precision of the light-shielding mask plate is improved. Positioning means that required precision are no longer required,
Improved reliability and reduced costs. As a result, a color image with less color shift can be output.

[Brief explanation of drawings]

1 to 2 show embodiments embodying the present invention; FIG. 1 is a schematic configuration diagram of a printer of one embodiment, and FIG. 2 is a schematic diagram of another embodiment. be. In the figure, 1 is a photoreceptor, 5 is a monochrome image carrier, 9 is photosensitive paper, and 16 is an optical means.

Claims (1)

[Scope of Claims] 1. An electrophotographic monochrome image forming means, a photosensitive paper capable of forming an image of a specific color with respect to light of a specific wavelength, and the monochrome image forming means In an image recording apparatus comprising an optical means arranged to form a monochrome image on the photosensitive paper, the monochrome image forming means includes a cylindrical photoreceptor and an outer periphery of the photoreceptor. An image recording apparatus comprising a sheet-shaped monochrome image bearing member that is attached so as to wrap a portion of the image bearing member and that is movable in synchronization with the outer periphery of the photoreceptor.