JPS5975266A - Color recording device - Google Patents

Abstract

PURPOSE:To complete a process of transfer to a recording form at a time and to perform color recording to normal paper with less color blurring through a small-sized, simple mechanism by forming a toner image at every color component on the 1st recording medium, transferring them to the 2nd recording medium repeatedly, and transferring the color picture from the 2nd recording medium to the recording form at a time. CONSTITUTION:An electrostatic latent image writing mechanism 2 is operated by a signal corresponding to a specified color component to form an electrostatic latent image on a write drum 1. Toner corresponding to the color component of the electrostatic latent image is selected in a polychromatic developing machine 3 and the image is developed to obtain a toner picture, which is transferred to a buffer drum 6. After the residual electrostatic latent image is erased and the residual toner is removed, a toner image corresponding to another color component is formed on the write drum 1 and transferred to the buffer drum 6 in superposed relation with the corresponding part on the buffer drum 6; and this process is repeated as many times as the number of the required color component to obtain the color picture on the buffer drum 6. This picture is transferred to the recording form 10 by a transfer corona electrifier 8 and passed between rolls 9 for fixation to obtain a final color picture.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a color recording apparatus that is small in size and has a simple mechanism, and yet performs high-quality color recording.

Conventional devices of this type form an electrostatic latent image by irradiating a photosensitive drum with light of a specific color component, develop this with toner of a color corresponding to the color component, and transfer it to recording paper. As a result, since one color component was recorded, precision was required for positioning the recording paper during transfer, and
The paper feeding mechanism is also complicated, color misregistration is likely to occur, and the device is also complicated and large.

In order to eliminate these drawbacks, the present invention forms a static latent image of a specific color component on a first recording medium, develops it with a toner of a color corresponding to the color component, and then prints it on the recording paper. Instead, the image is transferred onto a second recording medium, and the above process is repeated for the required number of color components for each envelope, and each color component is superimposed on the second recording medium to form the final color image. , are transferred together onto recording paper to perform color recording. The present invention will be described in detail below with reference to the drawings.

FIG. 1 is a diagram showing an embodiment of the present invention, in which 1 is a first recording medium, a writing drum whose surface is insulated;
2 is an electrostatic latent image writing mechanism; 3 is a multicolor developing device; 4 is a corona charger for erasing electrostatic latent images; 5 is a cleaning mechanism; 6 is a buffer drum whose surface is insulated, which is a second recording medium; T is a guide ρ-ra, 8 is a transfer corona charger, 9 is a fixing roller, and 10 is a recording paper.

To operate this, first, the electrostatic latent image writing mechanism 2 is operated in accordance with a signal corresponding to a specific color component to form an electrostatic latent image on the writing drum 1.

Next, a toner corresponding to the color component of the electrostatic latent image is selected from the multicolor developing device 3 and developed to obtain a toner image. The toner image is transferred to the back atram 6 by applying a strong electric field to the closest portion of the writing drum AI and transfer drum 6.

The electrostatic latent image remaining on the writing drum 1 is erased by a corona charger 4 for erasing the electrostatic latent image, and the remaining toner is removed by a cleaning mechanism 5.

Thereafter, by repeating the process of forming a toner image corresponding to a different color component on the writing drum 1 and overlappingly transferring it onto the corresponding part on the back atram 6 in the same way, the number of red color components is equal to 1. ,) to obtain a color image on the drum 6. Next, the recording paper 10 is sent to the buff 7 drum 6, and the color image is transferred from the back atram 6 to the recording paper 10 by the transfer corona load unit 8. Next, the recording paper 10 is passed through the fixing p-ra 9, and the toner image is fixed onto the recording paper 10 by pressure or heat to obtain a final color image.

Here, the multicolor developing device 3 has four independent developing devices with different toner colors around a rotating shaft, and by rotating, the developing devices of the necessary colors are brought into contact with the writing drum 1 one by one. It is now possible to do so. The multicolor developing device 3 is provided with independent developing sections 38.degree. 3M, 3Y, and 3B for four colors: cyan, macenta, yellow, and black, so that a color image can be obtained.

FIG. 2 shows details of the ion flow control type electrostatic latent image writing mechanism 2. In this figure, 21 is a cop line, 22 is an ion flow focusing electrode, 23 is an ion flow on/off control electrode, and 24
is a voltage generation circuit, and 25.26 is a power supply.

To operate this, a high voltage is applied to corona #21 to generate corona ions, the ion flow focusing electrode 22 focuses the corona ions, and the ion flow on/off control electrode 23 is connected to a voltage generating circuit. By applying a pulse voltage from 24, the flow of corner ions is controlled to form an electrostatic 1W image on the writing drum 1.

Note that the ion flow focusing electrode 22 is provided to focus corona ions and increase the recording speed, and may be omitted in an apparatus with a slow recording speed.

Further, in the above embodiment, the writing drum 1 has an insulating surface. However, in another embodiment, when the writing drum 1 having a photoconductive surface is used, the writing drum 1 To obtain a toner image thereon, a well-known electrophotographic process using an optical writing system may be used.
The rest is exactly the same as the above embodiment. Further, in the above description, a drum is used as the recording medium, but one or both of them may be in the shape of a belt or the like. - As explained above, the present invention involves creating a toner image for each color component on a first recording medium, repeating the operation of transferring this to a 20th compatible medium, and creating a color image on this second recording medium. Since the image is transferred to the recording paper all at once, the transfer process to the recording paper only needs to be done once, and the advantage is that color recording with less color shift can be performed on plain paper using a compact and simple mechanism. .

[Brief explanation of the drawing]

FIG. 1 is a schematic structural diagram showing an embodiment of the present invention, and FIG. 2 is a schematic structural diagram showing an example of the electrostatic latent image writing mechanism in the embodiment of FIG. In the figure, 1 is a writing drum, 2 is an electrostatic latent image writing mechanism, and 3 is a writing drum.
1 is a multicolor developing device, 4 is a corona charger for erasing electrostatic latent images, 5 is a cleaning mechanism, 6 is a buffer drum, T is a guide ruler, 8 is a corona charger for transfer, 9 is a fixing roller, 1
0 is recording paper. Figure 1 Vinegar 21 ==

Claims (3)

[Claims] (1) In an apparatus that performs recording by developing an electrostatic latent image formed on a recording medium with toner and transferring it to recording paper, a first recording medium and a an electrostatic latent image writing mechanism that forms an electrostatic latent image of each color component; a multicolor developing device that attaches toner of the color component to each electrostatic latent image; and a toner on the first recording medium. A second recording medium for transferring an image and a transfer mechanism for transferring the color image formed on the second recording medium onto the recording paper are used to transfer the color image onto the first recording medium for each color component. After an electrostatic latent image is formed by the electrostatic latent image writing mechanism, each color component is developed by the multicolor developing machine and transferred onto the second recording medium, and the toner images of all color components are transferred. 1. A color recording apparatus, wherein the color recording apparatus transfers and fixes the image onto the recording paper all at once after the image forming process is completed. (2) The color according to claim (1), wherein the first recording medium has an insulating surface, and an electrostatic latent image is formed on the first recording medium by controlling the ion flow. Recording device. (3) The scope of claims characterized in that the first recording medium has a photoconductive surface, and an electrostatic latent image is formed by writing a uniform electrostatic image on the first recording medium. The color recording device according to item (1).