JPH06110291A - Color image recorder - Google Patents

Abstract

PURPOSE:To provide a color image recorder capable of obtaining color image recording with high image quality by using 1st and 2nd photosensitive bodies. CONSTITUTION:This recorder is provided with the 1st and the 2nd photosensitive bodies 1 and 2 rotating in contact with each other, and a developing unit 3 arranged near to the 1st photosensitive body 1 and consisting of color developing devices 3C, 3M, 3Y and 3K of plural colors. The toner image of each color individually formed on the photosensitive body 1 is repetitively transferred on a recording paper 12 wound and carried on the 2nd photosensitive body 2, and the color developing devices 3C, 3M, 3Y and 3K of one color of the developing unit 3 are selected subsequently every time the photosensitive body 1 is rotated. Therefore, the color image recording with high image quality without causing the deviation of a transfer position is realized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color image recording apparatus using an electrophotographic process, and more particularly to a color image using the electrophotographic process capable of obtaining a high quality color recorded image at high speed. Recording device

[0002]

2. Description of the Related Art In recent years, in the field of information processing, with the shift to an advanced information society, the colorization of information display and recording has rapidly progressed, and even printers, which are output devices such as computers, have color. The demand for conversion is increasing day by day.

In order to meet these demands, various types of color image recording apparatuses have already been proposed.

For example, the apparatus disclosed in Japanese Patent Laid-Open No. 2-116878 is constructed so that a recording sheet can be wound around and fixed to an arbitrary position on the outer peripheral surface of the transfer drum, and each color can be fixed on the wound and fixed recording sheet. The toner images are sequentially transferred to increase the speed of color image formation. This type of device is called a multiple transfer type, and the device disclosed in JP-A-2-304465 is A plurality of photoconductors corresponding to each color are arranged on the same plane at regular intervals, and the recording paper is sequentially conveyed to the transfer positions of the plurality of photoconductors,
Toner images of respective colors are sequentially transferred onto the recording paper so as to increase the speed of color image formation. This type of device is called a tandem type. Further, in the apparatus disclosed in Japanese Patent Application Laid-Open No. 2-183276, the toner images of the respective color components formed on the photoconductor are once transferred onto an intermediate transfer medium composed of the photoconductor belt and superposed, and then the photoconductor belt This is an apparatus for obtaining a good recorded image by collectively transferring to a recording sheet conveyed to a transfer position. This type of apparatus is called an intermediate medium transfer type, and is also disclosed in JP-A-3-251860. In the device disclosed in Japanese Patent No. 3120, a drum-shaped first electrostatic latent image carrier and a second electrostatic latent image carrier that rotate in contact with each other are arranged, and a second electrostatic latent image carrier is disposed. The toner image formed on the first electrostatic latent image carrier is transferred onto the recording paper conveyed to the transfer position of the first electrostatic latent image carrier, and a good recording image is obtained. This type of device is called the inter-drum transfer type. And those are.

[0005]

Among the known types of color image recording apparatus described above, the inter-drum transfer type has a good image quality with a relatively small color shift compared to other types. The recorded image can be obtained.

However, in the apparatus disclosed in Japanese Patent Laid-Open No. 3-251860, which is the inter-drum transfer type, all color developing devices arranged around the first and second electrostatic latent image carriers are provided. When forming a high-quality full-color recorded image by using, first, the first transfer of the toner image from the second electrostatic latent image carrier to the first electrostatic latent image carrier, next In addition, since the second transfer of the toner image from the first electrostatic latent image carrier to the recording paper is performed twice, the overall transfer efficiency is reduced, and There is a problem that the image quality of the image deteriorates.

The present invention is intended to eliminate the above-mentioned problems, and an object thereof is to provide a color image recording apparatus capable of obtaining a high-quality color recorded image by using two electrostatic latent image carriers. To provide.

Another object of the present invention is to provide a color image recording apparatus which can increase the image recording speed according to the image quality to be obtained by using two electrostatic latent image carriers. It is in.

[0009]

In order to achieve the above object, the present invention relates to a first electrostatic latent image carrier and a second electrostatic latent image carrier which rotate in contact with each other, and And a developing unit composed of a color developing device for a plurality of colors arranged in the vicinity of the first electrostatic latent image carrier, and toner of each color formed individually on the first electrostatic latent image carrier. The image is repeatedly transferred to the recording sheet wound and conveyed around the second electrostatic latent image carrier, and the image is stored in the developing means every time the first electrostatic latent image carrier is rotated. The color developing device for one color is sequentially selected.

In order to achieve the another object, the present invention provides a first electrostatic latent image carrier and a second electrostatic latent image carrier which rotate in contact with each other, and the first electrostatic latent image carrier. The electrostatic latent image carrier and the second electrostatic latent image carrier, the developing means including color developing devices arranged in proximity to each of the second electrostatic latent image carrier, and the first electrostatic latent image. The toner image of one color on the carrier and the second
To form another toner image of one color on the electrostatic latent image carrier of
Furthermore, the toner image of one color formed on the first electrostatic latent image carrier is transferred to the second electrostatic latent image carrier, and the second electrostatic latent image carrier is transferred. The two color toner images formed on the body are transferred to the recording paper, and one color different from each other in the developing means is generated for each rotation of the first and second electrostatic latent image carriers. The color developing device comprises a second means for selecting in sequence.

Further, in order to achieve the above another object,
The present invention relates to a first electrostatic latent image carrier and a second electrostatic latent image carrier, which rotate in contact with each other, the first electrostatic latent image carrier and the second electrostatic latent image carrier. A latent image carrier and a developing unit composed of a plurality of color developing devices arranged close to each other, wherein the first electrostatic latent image carrier has a toner image of one color and the second electrostatic latent image carrier. A toner image of another color is formed on the electrostatic latent image carrier, and the toner images of the respective colors formed on the first electrostatic latent image carrier and the second electrostatic latent image carrier are formed. , The first electrostatic latent image carrier and the second electrostatic latent image carrier are transferred to both sides of a recording sheet to be conveyed between the first electrostatic latent image carrier and the second electrostatic latent image carrier, and the first and second electrostatic latent image carriers are transferred. A third means for sequentially selecting different color developing devices of one color among the developing means is provided each time the carrier is rotated.

[0012]

According to the first means, a first electrostatic latent image carrier and a second electrostatic latent image carrier which rotate in contact with each other,
When an image is recorded by using a developing unit composed of a color developing machine of a plurality of colors arranged in proximity to the first electrostatic latent image carrier, first, the first electrostatic latent image carrier is A toner image was formed by using a color developing machine for one color (for example, cyan) among the plural color developing machines, and the toner image was wound around the second electrostatic latent image carrier and conveyed. Transfer to recording paper, then
The other one of the color developing machines for a plurality of colors on the first electrostatic latent image carrier
A toner image is formed by using a color (for example, magenta) color developing device, and the toner image is transferred onto the recording paper that is wound around the second electrostatic latent image carrier and conveyed again. As before, a toner image is formed on the first electrostatic latent image carrier by using a color developing machine for another color (for example, yellow), and the toner image is formed on the second electrostatic latent image carrier. The toner image is transferred onto the recording paper on the carrier, and finally, a toner image is formed on the first electrostatic latent image carrier using the color developing machine for the remaining one color (for example, black), and this toner image is formed. Is transferred to the recording paper on the second electrostatic latent image carrier.

As described above, the first means includes the first electrostatic latent image carrier and the second electrostatic latent image carrier as many times as the number of color developing devices held by the developing means. Since the toner image is formed and the toner image is transferred onto the recording paper at each rotation, the toner images of the colors corresponding to all the color developing devices held by the developing unit are recorded. be able to. Further, a recording sheet is wound around the second electrostatic latent image carrier, the toner image formed on the first electrostatic latent image carrier is repeatedly transferred onto the recording sheet, and color image recording is performed. Therefore, a high quality color recorded image can be obtained.

According to the second means, the first electrostatic latent image carrier and the second electrostatic latent image carrier that rotate in contact with each other, and the first electrostatic latent image carrier. And the second electrostatic latent image carrier, the first electrostatic latent image carrier is first recorded when image recording is performed by using the developing means composed of a color developing machine of a plurality of colors arranged in proximity to the second electrostatic latent image carrier. To form a first toner image using a color developing machine for one color (for example, cyan) of a plurality of color developing machines and to develop a plurality of colors on the second electrostatic latent image carrier. The second toner image is formed by using another color developing machine of one color (for example, yellow) in the machine, and the first toner image is formed by the second toner of the second electrostatic latent image carrier. Transfer over the image.
Next, a third toner image is formed on the first electrostatic latent image carrier by using a color developing machine of still another color (for example, magenta) of a plurality of color developing machines, A second electrostatic latent image bearing member is used by using a color developing device for the remaining one color (for example, black) of the color developing devices for a plurality of colors so as to overlap the first and second toner images. 4 toner image is formed, and the third toner image is formed on the second electrostatic latent image carrier by the first, second, and
The image is transferred so as to be further superimposed on the fourth toner image. continue,
The first to fourth toner images of the second electrostatic latent image carrier are
It is transferred to the recording paper all at once.

As described above, the second means includes the first electrostatic latent image carrier and the second electrostatic latent image carrier as many times as the number of times of the number of the color developing devices held by the developing means. Is rotated, and during the first rotation, formation of a toner image on the first and second electrostatic latent image carriers and a second static image of the toner image on the first electrostatic latent image carrier. Transfer to the electrostatic latent image carrier, and at the time of the next rotation, form toner images on the first and second electrostatic latent image carriers and on the first electrostatic latent image carrier. Of the toner image on the second electrostatic latent image carrier and the transfer of the toner image on the second electrostatic latent image carrier to the recording sheet are performed. Similarly, it is possible to record toner images of colors corresponding to all the color developing devices possessed by the developing means. Further, toner images of different colors are simultaneously formed on the first and second electrostatic latent image carriers, and those toner images are sequentially superposed on the second electrostatic latent image carrier, and these superposed images are superposed. Since the toner image is transferred onto the recording paper and the color image is recorded, the color image can be recorded at a high speed.

According to the third means, the first electrostatic latent image carrier and the second electrostatic latent image carrier, which rotate in contact with each other, and the first electrostatic latent image carrier. And the second electrostatic latent image carrier, the first electrostatic latent image carrier is first recorded when image recording is performed by using the developing means composed of a color developing machine of a plurality of colors arranged in proximity to the second electrostatic latent image carrier. To form a first toner image using a color developing machine for one color (for example, cyan) of a plurality of color developing machines and to develop a plurality of colors on the second electrostatic latent image carrier. The second toner image is formed using the other color (e.g., yellow) color developing machine in the machine. Next, for the first electrostatic latent image carrier, another one color (for example, one of the plurality of colors in the color developing machine)
The third toner image is formed so as to overlap the first toner image by using the magenta color developing machine, and the second electrostatic latent image carrier carries the remaining toner in the multi-color developing machine. 1
A color (e.g., black) color developing machine is used to form a fourth toner image so as to overlap the second toner image. Then, the first and third toner images, the second and fourth toner images
The toner image is transferred to both sides of the recording paper passing between the first and second electrostatic latent image carriers.

As described above, the third means includes the first electrostatic latent image carrier and the second electrostatic latent image carrier as many times as half the number of the color developing devices held by the developing means. Is rotated to form a toner image on the first and second electrostatic latent image carriers at the first rotation, and at the next rotation, the first and second electrostatic latent images are formed. Formation of toner image on carrier and first and second
Since the toner image on the electrostatic latent image carrier is transferred to both sides of the recording sheet, the toner image of the color corresponding to half the color developing device held by the developing means on one side of the recording sheet, etc. It is possible to record a toner image of a color corresponding to the remaining color developing device on one side of. Further, toner images of different colors are simultaneously formed on the first and second electrostatic latent image carriers, and those toner images are sequentially superposed on the first and second electrostatic latent image carriers. Since the superimposed toner images are transferred to both sides of the recording paper to record the color image, the color image can be recorded at high speed.

[0018]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a schematic configuration diagram showing a first embodiment of an image forming section in a color image recording apparatus of the present invention.

In FIG. 1, reference numeral 1 is a first drum-shaped photosensitive member which is a first electrostatic latent image carrier, and 2 is a second drum-shaped photosensitive member which is a second electrostatic latent image carrier. 3 is a developing unit, 3
C is a cyan color developing device, 3M is a magenta color developing device, 3Y is a yellow color developing device, 3K is a black color developing device, 4 is a first charging device, and 5 is a second charging device. Device, 6 is a first exposure unit, 7 is a second exposure unit, 8 is a first cleaner, 9 is a second cleaner, 10 is a transfer device, 11 is a peeling claw, 12 is a recording sheet, and 13 is a removal unit. It is an electric appliance.

The first photoconductor 1 and the second photoconductor 2 are arranged in close contact with each other and are configured to rotate in the direction of the arrow in the figure. The developing unit 3 includes a cyan color developing device 3C, a magenta color developing device 3M,
Yellow color developing device 3Y, black color developing device 3K
Is configured to be rotatable, and one of the four color developing devices 3C, 3M, 3Y, and 3K is the first photoconductor 1.
Are selectively placed close to each other. First
On the peripheral surface of the photoconductor 1, the first charger 4, the first exposure unit 6, and the developing unit 3 are arranged in the upstream direction of the contact portion with the second photoconductor 2, and the downstream of the contact portion. A first cleaner 8 is arranged in the direction. On the peripheral surface of the second photoconductor 2, the second charger 5 is provided in the upstream direction of the contact portion with the first photoconductor 1.
The second exposure unit 7 and the developing unit 3 are arranged, and the static eliminator 13, the transfer unit 10, the second cleaner 9, and the peeling claw 11 are arranged in the downstream direction of the contact portion. Also, recording sheet 1
2 is configured to be conveyed and supplied between the second photoconductor 2 and the transfer device 10.

In a normal state, the second cleaner 9 arranged around the second photosensitive member 2, the black color developing device 3K of the developing unit 3, and the peeling claw 11 are all in the retracted state. And is in a position retracted from the surface of the second photoconductor 2, and the second charger 5 and the second charger 5
The exposure unit 6, the transfer unit 10, and the static eliminator 13 are also in a non-operating state.

The color image recording apparatus of this embodiment having the above-mentioned structure operates as described below.

The first and second photoconductors 1 and 2 are rotated in the directions of the arrows, respectively, and the developing unit 3 is rotated. For example, the cyan color developing device 3C is set to the first photoconductor 1
Is placed close to (moved to a developable position). At this time, the surface of the first photoconductor 1 is charged to a uniform potential by the first charger 4, and the charged portion of the surface is then exposed by the first exposure unit 6 in the cyan color component of the image information. The light is exposed by the laser light whose brightness is modulated by, the light emitted from the light emitting element (LED), etc., and an electrostatic latent image corresponding to the cyan color component of the image information is formed on the charged portion of the surface.
Subsequently, the electrostatic latent image is developed (reversal development) by adhesion of cyan toner in the cyan color developing device 3C to form a cyan toner (visible) image.

On the other hand, at a predetermined timing, the second photoconductor 2
The recording paper 12 conveyed to the transfer section of the
When it passes between the second photoconductor 2 and the transfer device 10, it is electrostatically adsorbed to the second photoconductor 2 and is wound around the outer peripheral surface of the second photoconductor 2 by the adsorption. The rotation of the photoconductor 2 shifts as the photoconductor 2 rotates. At this time, the peeling claw 11, the second cleaner 9, and the black color developing device 3K of the developing unit 3 are all retracted to positions away from the surface of the second photoconductor 2. , The second photoconductor 2
The recording paper 12 wrapped around the paper is rotated and moved together with the second photoconductor 2 without being disturbed by anything.

In this case, the second photoconductor 2 is usually
Since the rotation speed is set to be synchronized with the rotation speed of the first photosensitive drum 1, the cyan toner image formed on the surface of the first photosensitive member 1 by the cyan color developing device 3C is Recording paper 12 wrapped around the second photoconductor 2.
First and second at the timing that matches the transfer timing of
Are transferred to the contact portions of the photoconductors 1 and 2 of the first photoconductor 1, and at this time, the potential V ₁ (negative) of the toner (negatively charged) adhered portion on the surface of the first photoconductor 1 is transferred to the second photoconductor 2. If the potential is set to be smaller than the potential V ₂ (negative) of the winding recording paper 12 (V ₁ <V ₂ ), the toner on the surface of the first photosensitive member 1 is transferred to the recording paper 12 from the first photosensitive member 1. The toner is transferred to the recording paper 12 by the electrostatic force in the direction of. Then, the cyan toner image is recorded on the recording paper 12 on the second photoconductor 2.
Then, the surface of the first photoconductor 1 is cleaned by the first cleaner 11 to remove residual toner and the like,
At this point, the printing process of the first color (cyan color) ends.

In the printing process of the second color (for example, magenta color) to be executed next, first, the developing unit 3 is rotated counterclockwise by 90 degrees, and the magenta color developing device 3M is moved to the first position. The photoconductor 1 is placed close to the photoconductor 1 (moved to a developable position). Then, a magenta toner image is formed on the first photoconductor 1 through the same steps as those performed in the first color (cyan) printing process, and the magenta toner image is formed. Is transferred onto the recording paper 12 on the second photoconductor 2 so as to overlap with the previously formed cyan toner image. After this transfer, the surface of the first photoconductor 1 is cleaned by the first cleaner 11, and the printing process of the second color (magenta color) is completed.

In the subsequent third color (for example, yellow) printing process, the developing unit 3 is rotated so that the yellow color developing device 3Y is disposed close to the first photoconductor 1 this time. To do so. After that, a yellow toner image is formed on the first photoconductor 1 through a process exactly the same as the process performed in the printing process of the first color (cyan color) and the second color (magenta color). The yellow toner image is recorded on the recording paper 12 on the second photoconductor 2.
To the cyan and magenta toner images previously formed so as to be further overlapped. After this transfer, the surface of the first photoconductor 1 is cleaned by the first cleaner 11, and the printing process of the third color (yellow color) is completed.

The printing process of the fourth color (for example, black) executed subsequently is exactly the same as the above-mentioned printing process, and the first to the first recording sheets 12 on the recording paper 12 on the second photoconductor 2 are the same. Toner images of four colors (cyan, magenta, yellow, and black) are transferred so as to overlap with each other to form a full-color toner image.

When the full-color toner image is formed on the recording paper 12, the peeling claw 11 at the retracted position is retracted from the retracted position to a position close to the surface of the second photoconductor 2 and, at the same time, the charge eliminator. 13 is also activated.
Therefore, the recording paper 12 is removed from the second photoconductor 2 by the removing claw 11 whose position has been restored after the charge is removed by the charge remover 13. Then, the peeled recording paper 12 is fixed with a full-color toner image by a fixing device (not shown), and a series of image recording processes is completed.

In the above embodiment, the static eliminator 13
In the above, the recording paper 12 on the second photoconductor 2 is destaticized. However, the destaticizer 13 is removed and the recording paper 1 is removed.
When 2 passes through the transfer device 10, the input voltage supplied to the transfer device 10 may be switched to eliminate the charge.

As described above, according to this embodiment, the toner images of all the colors are transferred to the recording paper 12 when the development is performed using the color developing devices 3C, 3M, 3Y, 3K of all the colors. In order to do so, it is necessary to rotate the first photoconductor 1 and the second photoconductor 2 four times, respectively. Therefore, although the image recording speed becomes slow, the recording paper 12 is wound around the second photoconductor 2. Since the toner image of each color is repeatedly transferred from the first photoconductor 1 to the recording paper 12 on the second photoconductor 2, the positional deviation due to the eccentricity of the first and second photoconductors 1 and 2 may occur. It is possible to obtain a high-quality color recorded image that is canceled and does not cause a transfer position shift between the respective colors.

Next, FIG. 2 is a schematic configuration diagram showing a second embodiment of the image forming portion in the color image recording apparatus of the present invention.

In FIG. 2, the same components as those shown in FIG. 1 are designated by the same reference numerals.

The difference between the present embodiment and the first embodiment is that in the first embodiment, the second cleaner 9 and the developing unit 3 arranged around the second photoconductor 2 are arranged. , The peeling claw 11 and the like are constantly retracted to a position retracted from the surface of the second photoconductor 2, and the second charger 5,
While the second exposure unit 6, the transfer unit 10, and the static eliminator 13 are in a non-operating state, in the present embodiment, the constituent elements are
The second charger 5 and the second exposure unit 6 are constantly retracted to a position close to the surface of the second photoconductor 2.
The transfer device 10 and the static eliminator 13 are in the operating state, and in the first embodiment, before the toner images are formed on the first and second photoconductors 1 and 2, the recording paper 12 is set to the second In the present embodiment, the recording sheet 12 is conveyed to the transfer section after the toner images are formed on the first and second photoreceptors 1 and 2, whereas the transfer section of the photoreceptor 2 is conveyed. Points,
In addition, no structural difference can be found between this embodiment and the first embodiment.

The color image recording apparatus according to this embodiment operates as described below.

First, when forming toner images of two colors, for example, cyan and black, the first and second toner images are formed.
Of the cyan color developing device 3 while rotating the photoconductors 1 and 2 in the directions of the arrows and the developing unit 3 respectively.
C is placed close to the first photoconductor 1 and the black color developing device 3K is placed close to the second photoconductor 2. In this state, the surface of the first photoconductor 1 is charged to a uniform potential by the first charger 4, and then the charged portion of the surface is exposed by the first exposure unit 6, and the surface of the first photoconductor 1 is exposed. An electrostatic latent image corresponding to cyan color is formed on the charged portion of.
Subsequently, the electrostatic latent image is developed in the cyan color developing device 3C, and a cyan toner (visible) image is formed on the surface of the first photoconductor 1. In parallel with this operation, the second
The surface of the photoconductor 2 is also charged to a uniform potential by the second charger 5, and the charged portion of the surface is then charged to the second potential.
Is exposed by the exposure unit 7 to form an electrostatic latent image corresponding to black color on the charged portion of the surface. Subsequently, the electrostatic latent image is developed by the black color developing device 3K, and a black toner (visible) image is formed on the surface of the second photoconductor 2.

Here, when the toner images of the two colors of cyan and black are transferred and recorded on the recording paper 12, the cyan toner images on the surface of the first photoconductor 1 are transferred to the first and second toner images. At the contact portion of the photoconductors 1 and 2, transfer is performed so as to overlap the black toner image of the second photoconductor 2, and the two color toners of cyan and black are transferred to the surface of the second photoconductor 2. Form a (visible) image. In this case, the cyan toner image is transferred from the first photoconductor 1 to the second photoconductor 1 with respect to the cyan toner image on the first photoconductor 1 as in the case of the first embodiment. Each photoconductor 1, so that electrostatic force acts in the direction of the photoconductor 2,
2 by controlling the surface potential. Next, at the timing when the two color toner images on the surface of the second photoconductor 2 are supplied to the transfer unit having the transfer unit 10, the recording paper 12 is supplied to the transfer unit, and the recording unit 12 is supplied by the transfer unit 10. The toner images of the two colors may be transferred to, and subsequently, the transferred toner images of the two colors may be fixed by a fixing device (not shown).

On the other hand, to obtain a full-color recorded image, after forming a cyan toner image on the surface of the first photoconductor 1 and a black toner image on the surface of the second photoconductor 2, respectively. , The developing unit 3 is rotated 180 degrees while rotating the first and second photoconductors 1 and 2 respectively in the directions of the arrows, and the color developing device 3Y for the next two colors, for example, the yellow color, is set to the first photoconductor. 1, and the magenta color developing device 3M is placed close to the second photoconductor 2.
In this state, as in the previous case, the first photoreceptor 1
Has its surface charged to a uniform potential by the first charger 4, and then the charged portion of the surface is charged by the first exposure unit 6
And an electrostatic latent image corresponding to the yellow color is formed on the charged portion of the surface so as to overlap the already formed cyan toner image. Subsequently, the electrostatic latent image is developed in the yellow color developing device 3Y,
A yellow toner (visible) image is formed on the surface of the first photoconductor 1 so as to overlap the cyan toner image, and two cyan and yellow toner images are formed thereon. In parallel with this operation, the surface of the second photoconductor 2 is also charged to a uniform potential by the second charger 5, and then the charged portion of the surface is exposed by the second exposure unit 7. A magenta electrostatic latent image is formed on the charged portion of the surface so as to overlap the already formed black toner image. Subsequently, the electrostatic latent image is developed by a magenta color developing device 3M, and a magenta toner (visible) image is formed on the surface of the second photoconductor 2 so as to overlap the black toner image. Two color toner images of black and magenta are formed here. Next, two cyan and yellow colors on the surface of the first photoconductor 1
The color toner images are transferred at the contact portions of the first and second photoconductors 1 and 2 so as to overlap the black and magenta color toner images of the second photoconductor 2,
After all, full-color four-color toner (visible) images are formed on the surface of the second photoconductor 2.

Here, in the case of transferring and recording the toner (visible) image of four full color toners onto the recording paper 12, the recording paper 12 is transferred at the timing when the toner image of four full color toners is supplied to the transfer portion. Supply to the transfer section,
The transfer device 10 may transfer the full-color four-color toner image onto the recording paper 12, and then the toner image transferred onto the recording paper 12 may be fixed by a fixing device.

In the above operation process, when developing the electrostatic latent image of the second color on the first and second photoconductors 1 and 2, the already formed toner image of the first color is disturbed. To avoid this, it is desirable to employ non-contact development or soft development.

It is preferable that the developing unit 3 is always arranged close to the surfaces of the first and second photoconductors 1 and 2, but the first and / or second photoconductors 1 and 2 are appropriately arranged.
It may be configured to be able to retract to a position retracted from 2.

Further, in this embodiment, the developing unit 3
Color developing devices 3C, 3M, 3Y for the respective colors disposed inside
The order of arrangement of 3K is not limited to the example shown in the figure, and may be changed manually or automatically depending on the color to be printed.

Further, in the present embodiment, when two-color image recording is performed, the toner image formed on the second photoconductor 2 is described as cyan and black. However, two-color image is formed. The recording is not limited to the above two colors, and it goes without saying that other colors may be combined.

According to this embodiment, the full-color toner using the color developing devices 3C, 3M, 3Y, and 3K for all the colors can be obtained by simply rotating the first photoconductor 1 and the second photoconductor 2 twice. Since an image can be formed, full-color image recording can be performed at high speed.

Further, according to the present embodiment, not only full-color image recording but also image recording of appropriately selected two colors out of four colors can be performed, so that it can be applied to a wide range of applications.

Next, FIG. 3 is a schematic configuration diagram showing a third embodiment of the image forming section in the color image recording apparatus of the present invention.

In FIG. 3, 14 is a developing means, 14C is a cyan color developing device, 14M is a magenta color developing device,
14Y is a yellow color developing device, 14K is a black color developing device, and the developing means 14 includes a cyan color developing device 14C, a magenta color developing device 14M, and a yellow color developing device 14Y. It is composed of a black color developing device 14K. In addition, the same components as those shown in FIG. 1 are designated by the same reference numerals.

The difference between the present embodiment and the first embodiment is that, as the developing means, in the first embodiment, each color developing device 3C, 3M, 3Y, 3K is used as one developing unit 3.
In contrast to the integrated type (shared type) built in the inside, in the present embodiment, the color developing devices 14C and 14M for each color are
14Y and 14K are independent, and cyan and magenta color developing devices 14C and 14M are assigned to the first photoconductor 1 and yellow and black color developing devices 14Y and 14K are assigned to the first photoconductor 1. It is only assigned to the two photoconductors 2, and no other structural difference can be found between this embodiment and the first embodiment.

The operation of this embodiment having the above-mentioned configuration is as follows.

The first and second photoconductors 1 and 2 are rotated in the directions of the arrows shown in the drawing, and a color developing device 3C for one color, for example, cyan color, is placed close to the first photoconductor 1. In this state, first, the first photoconductor 1
The charging device 4 charges the surface to a uniform potential, and then, by exposure in the first exposure unit 6, an electrostatic latent image corresponding to cyan is formed on the charged portion. continue,
This electrostatic latent image is developed by a cyan color developing device 14C, and cyan toner (visible) is formed on the surface of the first photoconductor 1.
An image is formed.

On the other hand, at a predetermined timing, the second photoconductor 2
The recording paper 12 conveyed to the transfer section is electrostatically attracted to the second photoconductor 2 by the transfer device 10, and is thereby wound around the outer peripheral surface of the second photoconductor 2. At this time, the second cleaner 9, the yellow color developing device 14Y, the black color developing device 14K, and the peeling claw 11 arranged around the second photoconductor 2 are in the retract state, 2 is at a position retracted from the surface of the photoconductor 2.

Also in this embodiment, since the first and second photoconductors 1 and 2 are set to rotate at the synchronized speed, the cyan toner formed on the first photoconductor 1 is formed. The image is the recording paper 12 wrapped around the second photoconductor 2.
In accordance with the transfer timing of the first and second photoconductors 1,
The toner image of the cyan color is transferred to the recording sheet 12 of the second photoconductor 2 by the same mechanism as the transfer mechanism of the first embodiment.
Will be transferred to. After this transfer, the surface of the first photoconductor 1 is cleaned by the first cleaner 11, and the printing process of the first color (cyan color) is completed here.

In the subsequent second color (magenta) printing process, the cyan color developing device 3C is retracted from the surface of the first photoconductor 1 and the magenta color developing device 3M is removed. It is arranged close to the surface of the first photoconductor 1. Then, a magenta toner image is formed on the surface of the first photoconductor 1 by going through the same process as the first color (cyan) printing process, and the magenta toner image is transferred to the second toner image. The image is transferred onto the recording paper 12 of the photoconductor 2 so as to overlap the already transferred cyan toner image. After this transfer, the surface of the first photoconductor 1 is cleaned by the first cleaner 11.

When two color toner images of cyan and magenta are formed on the recording paper 12, the peeling claw 11 which has been in the retracted position is retracted to the operating position, and at the same time, the static eliminator 13 is operated. In this state, the recording paper 12 on the second photoconductor 2 is destaticized by the static eliminator 13 and then peeled off from the second photoconductor 2 by the peeling claw 11 and then by the fixing device (not shown). The two color toner images are fixed on the recording paper 12, and a series of image recording processes are completed.

According to this embodiment, when the color image recording of two colors is performed by using the two color developing devices 14C and 14M which can be developed on the first photoreceptor 1, the second photoreceptor 2 is used. The recording sheet 12 is wound around the recording medium 1 and the recording sheet 1 is transferred from the first photoconductor 1 to the recording sheet 1.
Since the toner image is repeatedly transferred to 2,
The positional deviation due to the eccentricity of the first and second photoconductors 1 and 2 is canceled, and it is possible to obtain a high quality color recorded image in which the positional deviation does not occur between the respective colors.

Next, FIG. 4 is a schematic configuration diagram showing a fourth embodiment of the image forming section in the color image recording apparatus of the present invention.

In FIG. 4, the same components as those shown in FIG. 3 are designated by the same symbols.

The difference between the constitution of this embodiment and the constitution of the second embodiment shown in FIG. 2 is that as the developing means, in the second embodiment, the color developing devices 3C, 3M, 3Y, 3K for the respective colors are used. In contrast to the integrated type (common type) in which one developing unit 3 is built in, in the present embodiment, a color developing device 14C for each color,
14M, 14Y, and 14K are independent types, and are cyan and magenta color developing devices 14C and 1C.
4M is assigned to the first photoconductor 1, and the yellow and black color developing devices 14Y and 14K are assigned to the second photoconductor 2. In addition, the present embodiment and the second embodiment are performed. I can't find a structural difference with the example.

The operation of this embodiment is essentially the same as the operation of the second embodiment already described, except for the method of selecting the color developing devices 14C, 14M, 14Y and 14K in the developing means. Detailed description of the operation of this embodiment will be omitted, and mainly the color developing devices 14C, 14M, 14 will be described.
The point of selecting Y and 14K will be described.

In this embodiment, when the cyan color developing device 14C is selected on the first photoconductor 1 side and the yellow color developing device 14Y is selected on the second photoconductor 2 side, cyan is used. The color developing device 14C is retracted to a position close to the surface of the first photoconductor 1, and the yellow color developing device 14Y is retracted to a position close to the surface of the second photoconductor 2. Color developing device 14M,
14K is retracted to a position retracted from the surface of the corresponding photoconductor 1 or 2. In this state, a cyan toner image is formed on the surface of the first photoconductor 1 and a yellow toner image is formed on the surface of the second photoconductor 2.

When two-color image recording of cyan and yellow is performed, first, the cyan toner image is transferred to the second photoconductor 2 so as to overlap the yellow toner image. Then, the toner images of the two colors are formed on the surface of the second photoconductor 2. Then this 2
After the color toner image is transferred to the recording paper 12, the transferred image is fixed on the recording paper 12.

When a full-color image recording is to be obtained, a cyan toner image is formed on the surface of the first photoconductor 1 and a yellow toner image is formed on the surface of the second photoconductor 2, respectively. Since the magenta color developing device 14M is selected on the side of the first photoconductor 1 and the black color developing device 14K is selected on the second photoconductor 2 side, the magenta color developing device 14M is selected as the first photosensing device. Retract to a position close to the surface of the body 1 and a black color developing device 1
4K is retracted to a position close to the surface of the second photoconductor 2, and the other color developing devices 14C and 14Y are retracted to positions retracted from the surfaces of the corresponding photoconductors 1 and 2. In this state, a magenta toner image is superimposed on the cyan toner image formed on the surface of the first photoconductor 1 and a yellow toner image formed on the surface of the second photoconductor 2 is formed. To form a black toner image.

When recording a full-color image, the two toner images of cyan and magenta formed on the first photoconductor 1 are overlapped with the two toner images of yellow and black to form a second photoconductor. 2 to form a full-color toner image on the surface of the second photoconductor 2. Next, the full-color toner image is printed on the recording paper 12
And then fix it.

According to this embodiment, the full-color toner using the color developing units 3C, 3M, 3Y, and 3K for all the colors can be obtained by rotating the first photoconductor 1 and the second photoconductor 2 twice. An image can be formed, and full-color image recording can be performed at high speed.

Further, according to this embodiment, not only full-color image recording but also image recording of appropriately selected two colors out of four colors can be performed, and it can be applied to a wide range of applications.

Further, according to this embodiment, the structure of the developing means 14 including the developing devices 14C, 14M, 14Y and 14K is simpler than that of the second embodiment.

Next, FIG. 5 is a schematic configuration diagram showing a fifth embodiment of the image forming section in the color image recording apparatus of the present invention.

In FIG. 5, 15 is a developing means, 15C is a cyan color developing device, 15M is a magenta color developing device,
Reference numeral 15Y is a yellow color developing device, 15K is a black color developing device, and the developing means 15 includes a cyan color developing device 15C, a magenta color developing device 15M, and a yellow color developing device 15Y. It is composed of a black color developing device 15K. In addition, the same components as those shown in FIG. 3 are designated by the same reference numerals.

The difference between the present embodiment and the third embodiment shown in FIG. 3 is that in the third embodiment, each color developing unit 14C arranged on the first photoconductor 1 side is 14M and
Each color developing device 14Y, 14 disposed on the second photoconductor 2 side
Whereas K is composed of individual components, this embodiment
Each color developing device 15C, 15 arranged on the side of the first photoconductor 1
M and each color developing device 1 disposed on the second photoconductor 2 side
It is only that slide switches 5Y and 15K are configured, and no other structural difference can be found between this embodiment and the third embodiment.

The operation of the present embodiment having the above-described structure is the selection switching operation of the color developing devices 15C, 15M, 15Y, and 15K, that is, as in the third embodiment, the color developing devices 14C,
The selection switching is performed by retracting 14M, 14Y, and 14K in the radial direction of the photoconductors 1 and 2 or, as in the present embodiment, developing devices 15C and 1C of the respective colors.
The operation is exactly the same as that of the third embodiment except that the selection switching is performed by sliding 5M, 15Y, and 15K in the normal direction of the photoconductors 1 and 2.
Further detailed description of the operation of this embodiment will be omitted.

According to this embodiment, when the two color developing devices 15C and 15M which can be developed on the first photoconductor 1 are used to record two color images, the second photoconductor 2 is used. The recording sheet 12 is wound around the recording medium 1 and the recording sheet 1
Since the toner image is repeatedly transferred to 2,
The positional deviation due to the eccentricity of the first and second photoconductors 1 and 2 is canceled, and it is possible to obtain a high quality color recorded image in which the transfer positional deviation does not occur between the respective colors.

Further, according to this embodiment, since the slide switching type color developing devices 15C, 15M and 15Y, 15K are used, the first and second photoconductors 1 and 2 and each color developing device 1 are used.
Only one contact portion with 5C, 15M and 15Y, 15K is required, and the shapes of the first and second photoconductors 1 and 2 can be reduced, and the image recording apparatus can be downsized accordingly.

Next, FIG. 6 is a schematic configuration diagram showing a sixth embodiment of the image forming section in the color image recording apparatus of the present invention.

In FIG. 6, the same components as those shown in FIG. 5 are designated by the same reference numerals.

The difference between the present embodiment and the fourth embodiment shown in FIG. 4 is that in the fourth embodiment, each color developing unit 14C disposed on the first photoconductor 1 side is 14M and
Each color developing device 14Y, 14 disposed on the second photoconductor 2 side
Whereas K is composed of individual components, this embodiment
Each color developing device 15C, 15 arranged on the side of the first photoconductor 1
M and each color developing device 1 disposed on the second photoconductor 2 side
It is only that 5Y and 15K are configured by a slide switching type, and no other structural difference can be found between this embodiment and the fourth embodiment.

The operation of the present embodiment having the above-described structure is the selection switching operation of the color developing devices 15C, 15M, 15Y, 15K, that is, the color developing devices 14C, 14C,
The selection switching is performed by retracting 14M, 14Y, and 14K in the radial direction of the photoconductors 1 and 2 or, as in the present embodiment, developing devices 15C and 1C of the respective colors.
The operation is exactly the same as that of the fourth embodiment, except that the selection switching is performed by sliding 5M, 15Y, and 15K in the normal direction of the photoconductors 1 and 2.
Further detailed description of the operation of this embodiment will be omitted.

According to this embodiment, the full-color toner using the color developing devices 3C, 3M, 3Y, and 3K for all the colors can be obtained only by rotating the first photoconductor 1 and the second photoconductor 2 twice. An image can be formed, and full-color image recording can be performed at high speed.

Further, according to this embodiment, not only full-color image recording but also two-color image recording appropriately selected from the four colors can be performed, and it can be applied to a wide range of applications.

Furthermore, according to the present embodiment, since the slide switching type color developing devices 15C, 15M and 15Y, 15K are used, the first and second photoconductors 1, 2 and the respective color developing devices 15C, 15M are used. Also, only one contact portion with 15Y and 15K is required, the shape of the first and second photoconductors 1 and 2 can be reduced, and the image recording apparatus can be downsized.

By the way, of the above-described respective embodiments, in the first embodiment, the conveyance timing of the recording paper 12 and the retract state of the developing unit 3 with respect to the second photoconductor 2 are appropriately changed, and The peeling claw 11 is retracted from the retracted position to the operating position close to the second photoconductor 2, and the second charger 5, the second exposure unit 6, the transfer unit 10, and the static eliminator 13 are put into the operating state. Can be configured as in the second embodiment, and vice versa.

Further, in the third embodiment, as in the previous case, the transport timing of the recording paper 12 is appropriately changed, and the yellow color developing device 14Y and the black color developing device 14K are used.
One of the selected ones of the two is removed from the retracted position to the operating position in the vicinity of the second photoconductor 2, and the second charger 5, the second exposure unit 6, If the transfer unit 10 and the static eliminator 13 are changed so as to be in the operating state, the fourth embodiment can be constructed, and vice versa.

Further, in the fifth embodiment, as in the previous case, the conveyance timing of the recording paper 12 is appropriately changed to select one of the yellow color developing device 15Y and the black color developing device 15K. On the other hand, one of the peeling claws 11 is slid and retracted from the retracted position to the operation position close to the second photoconductor 2, and the second charger 5, the second exposure unit 6, and the transfer unit 10 are moved. If the static eliminator 13 is changed so as to be in the operating state, the fourth embodiment can be constructed and vice versa.

Further, FIG. 7 is a schematic configuration diagram showing a seventh embodiment of the image forming section in the color image recording apparatus of the present invention.

In FIG. 7, the same components as those shown in FIG. 4 are designated by the same reference numerals.

The difference between the present embodiment and the fourth embodiment shown in FIG. 4 is that the transfer position of the recording paper 12 is different from that of the second photosensitive member 2 in the fourth embodiment. In contrast to this embodiment, the present embodiment is different only in that it is supplied between the first photosensitive member 1 and the second photosensitive member 2. No structural difference can be found between the fourth and fourth embodiments.

The operation of this embodiment having the above-mentioned structure is as follows.

First, when forming toner images of two colors, for example, cyan and black, the first and second toner images are formed.
The photoconductors 1 and 2 are respectively rotated in the directions of the arrows, and at the same time, the cyan color developing device 14C and the black color developing device 14K are arranged close to the first photoconductor 1 and the second photoconductor 2, respectively. Let In this state, the surface of the first photoconductor 1 is charged to a uniform electric potential by the first charger 4, and then the charged portion of the surface is exposed by the first exposure unit 6 so that the surface of the first photoconductor 1 is exposed. An electrostatic latent image corresponding to cyan is formed on the charged portion. Subsequently, the electrostatic latent image is developed by the cyan color developing device 14C, and a cyan toner image is formed on the surface of the first photoconductor 1. In parallel with this operation, the surface of the second photoconductor 2 is also charged to a uniform potential by the second charger 5, and then the charged portion of the surface is exposed by the second exposure unit 7. An electrostatic latent image corresponding to black is formed on the charged portion of the surface. Subsequently, the electrostatic latent image is developed by the black color developing device 14K, and a black toner image is formed on the surface of the second photoconductor 2.

Next, while rotating the first and second photoconductors 1 and 2 respectively in the directions of the arrows, the cyan color developing device 1
4C and the black color developing device 14K are retracted to the retracted position, the magenta color developing device 14M is close to the first photoconductor 1, and the yellow color developing device 14Y is close to the second photoconductor 2. Try to place it. In this state, as before, the surface of the first photoconductor 1 is charged to a uniform potential by the first charger 4, and then the charged portion of the surface is exposed by the first exposure unit 6. Then, an electrostatic latent image corresponding to magenta is formed on the charged portion of the surface so as to overlap the already formed cyan toner image. Subsequently, the electrostatic latent image is developed in the magenta color developing device 14M, and a magenta toner image is formed on the surface of the first photoconductor 1 so as to overlap with the cyan toner image. Two color toner images of magenta are formed. In parallel with this operation, the second
The surface of the photoconductor 2 is also charged to a uniform potential by the second charger 5, and then the charged portion of the surface is exposed by the second exposure unit 7 to be already formed on the charged portion of the surface. A yellow electrostatic latent image is formed so as to overlap the black toner image being formed. Subsequently, the electrostatic latent image is developed by the yellow color developing device 14Y, and a yellow toner image overlapping the black toner image is formed on the surface of the second photoconductor 2, and the black toner image is formed on the surface of the second photoreceptor 2. And two yellow toner images are formed.

At this time, the two cyan and magenta colors are used.
The color toner image and the two color toner images of black and yellow are respectively transferred to the first and second photoconductors 1 and 2.
The recording paper 12 is supplied to the contact portion at the timing when the recording paper 12 is supplied to the contact portion, and one surface of the recording paper 12 is a toner image of two colors of cyan and magenta, and the other surface is the black and yellow colors. The two color toner images are transferred in the same manner. In this case, in the case of double-sided simultaneous transfer to the recording paper 12, the charging polarity of the first charger 4 on the side of the first photoconductor 1 is positive, the charging polarities of the cyan and magenta toners are positive, and the second is the second. The charging polarity of the second charger 5 on the side of the photoconductor 2 is negative, the charging polarities of the black and yellow toners are negative, and the surface potential of the adhered portion of the cyan and magenta toners is V ₃ , black. And V ₄ is the surface potential of the portion where the yellow toner adheres, V ₃ > V ₄
When the setting is made such that the electrostatic force acts on the cyan and magenta toners on the surface of the first photoconductor 1 in the direction from the first photoconductor 1 to the second photoconductor 2, and With respect to the black and yellow toners on the surface of the photoconductor 2, an electrostatic force acts in the direction from the second photoconductor 2 to the first photoconductor 1, so that cyan and The magenta toner image and the black and yellow toner images are simultaneously transferred to the other surface. Further, the toner images transferred on both sides of the recording paper 12 are fixed by the fixing device, which is exactly the same as the previous embodiments.

In this embodiment, cyan and magenta color developing devices 14C and 14M are provided on the first photoconductor 1 side.
And the yellow and black color developing devices 14Y and 14K are disposed on the second photoconductor 2 side, but the present invention is not limited to such an arrangement, and each color The developing device can be freely selected on the side of the first and second photoconductors 1 and 2.

According to this embodiment, since color images can be recorded on both sides of the recording paper 12 at the same time, color images can be recorded at high speed.

FIG. 8 is a schematic structural view showing an eighth embodiment of the image forming section in the color image recording apparatus of the present invention.

In FIG. 8, the same components as those shown in FIG. 6 are designated by the same reference numerals.

The difference in structure between this embodiment and the seventh embodiment shown in FIG. 7 is that in the seventh embodiment, each color developing unit 14C arranged on the first photoconductor 1 side, 14M and
Each color developing device 14Y, 14 disposed on the second photoconductor 2 side
Whereas K is composed of individual components, this embodiment
Each color developing device 15C, 15 arranged on the side of the first photoconductor 1
M and each color developing device 1 disposed on the second photoconductor 2 side
It is only that slides of 5Y and 15K are configured, and no other structural difference can be found between this embodiment and the seventh embodiment.

The operation of the present embodiment having the above-described structure is the selection switching operation of the color developing devices 15C, 15M, 15Y and 15K, that is, as in the seventh embodiment, the color developing devices 14C,
The selection switching is performed by retracting 14M, 14Y, and 14K in the radial direction of the photoconductors 1 and 2 or, as in the present embodiment, developing devices 15C and 1C of the respective colors.
The operation is exactly the same as that of the seventh embodiment except that the selection switching is performed by retracting 5M, 15Y and 15K in the normal direction of the photoconductors 1 and 2. Further detailed description of the operation of is omitted.

According to this embodiment, as in the seventh embodiment, color image recording can be performed on both sides of the recording paper 12 simultaneously, and color image recording can be performed at high speed.

In each of the above-mentioned embodiments, the first and second photoconductors 1 and 2 are drum-shaped ones. A similar function can be achieved by using a belt-shaped member instead of the drum-shaped member. When belt-shaped members are used as the first and second photoconductors 1 and 2, process means such as charging, exposure, development and transfer are relatively arbitrary around the photoconductors 1 and 2. Since it is possible to arrange the image forming apparatus, it is possible to configure a compact image recording apparatus.

[0099]

As described above, according to the present invention,
A first photoconductor 1 which is a first electrostatic latent image carrier and a second photoconductor 2 which is a second electrostatic latent image carrier are provided.
A plurality of color developing devices (for example, 3
C, 3M, 3Y, 3K) so that the toner images of the respective colors formed on the first photoconductor 1 are repeatedly transferred onto the recording paper 12 wound around the second photoconductor 2. The recording paper 12 can record toner images of all colors based on the plurality of color developing devices (for example, 3C, 3M, 3Y, 3K), and the first and second photoconductors can be recorded. There is an effect that it is possible to perform high-quality image recording without transfer position deviation due to eccentricity of 1 or 2.

Further, according to the present invention, the first photoconductor 1 and the second photoconductor 2 are provided, and a plurality of the photoconductors 1 and 2 are selectively provided on the first and second photoconductors 1 and 2, respectively. Color developing device 3
C, 3M, 3Y, and 3K are acted, and the first photoconductor 1
And the toner images of the respective colors are simultaneously formed on the second photoconductor 2 once or twice, and then the toner images formed on the first photoconductor 1 are transferred to the second photoconductor 2.
The toner images formed on the first photoconductor 1 and the second photoconductor 2 are transferred onto the recording paper 12 or the toner images of the respective colors formed on the first photoconductor 1 and the second photoconductor 2 are recorded. Since the images are transferred onto both sides of the paper 12, it is possible to record toner images of all colors on the recording paper 12 based on the plurality of color developing devices (for example, 3C, 3M, 3Y, 3K). Moreover, there is an effect that the recording can be performed at a high speed.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing a first embodiment of an image forming section in a color image recording apparatus of the present invention.

FIG. 2 is a schematic configuration diagram showing a second embodiment of the image forming unit in the color image recording apparatus of the present invention.

FIG. 3 is a schematic configuration diagram showing a third embodiment of the image forming unit in the color image recording apparatus of the present invention.

FIG. 4 is a schematic configuration diagram showing a fourth embodiment of the image forming section in the color image recording apparatus of the present invention.

FIG. 5 is a schematic configuration diagram showing a fifth embodiment of the image forming section in the color image recording apparatus of the present invention.

FIG. 6 is a schematic configuration diagram showing a sixth embodiment of the image forming unit in the color image recording apparatus of the present invention.

FIG. 7 is a schematic configuration diagram showing a seventh embodiment of the image forming section in the color image recording apparatus of the present invention.

FIG. 8 is a schematic configuration diagram showing an eighth embodiment of the image forming section in the color image recording apparatus of the present invention.

[Explanation of symbols]

 1 1st drum-shaped photoconductor (1st electrostatic latent image carrier) 2 2nd drum-shaped photoconductor (2nd electrostatic latent image carrier) 3 Developing unit (developing means) 3C Unit 3 Cyan color developing device in 3M magenta color developing device in unit 3Y yellow color developing device in 3Y unit 3K black color developing device in unit 3 4 first charger 5 second Charger 6 First exposure part 7 Second exposure part 8 First cleaner 9 Second cleaner 10 Transfer device 11 Separation claw 12 Recording paper 13 Static eliminator 14, 15 Developing means 14C Independent cyan color development Device 14M Independent magenta color developing device 14Y Independent yellow color developing device 14K Independent black color developing device 15C Sliding type cyan color developing device 15M Sliding type magenta color developing device 15Y Slur Id type yellow color developing device 15K Slide type black color developing device

Claims (11)

[Claims] 1. A first electrostatic latent image carrier and a second electrostatic latent image carrier that rotate in contact with each other, and a plurality of units arranged close to the first electrostatic latent image carrier. A developing device including a color developing device for each color, and winding the toner image of each color individually formed on the first electrostatic latent image carrier onto the second electrostatic latent image carrier. The color developing device for one color in the developing means is sequentially selected every time the first electrostatic latent image carrier is rotated while being repeatedly transferred to the conveyed recording paper. Color image recording device. 2. The second electrostatic latent image carrier is made to adsorb a recording sheet by a transfer means arranged in proximity, and the recording sheet is wound around the second electrostatic latent image carrier and conveyed. The color image recording apparatus according to claim 1, wherein 3. The color image recording apparatus according to claim 1, wherein the developing means is an integral type in which color developing devices for a plurality of colors are sequentially selected by rotation. 4. The color image recording apparatus according to claim 1, wherein the developing means is of an individual type in which color developing devices for a plurality of retracted colors are sequentially selected by proximity. 5. The color image recording apparatus according to claim 1, wherein the developing means is of an individual type that is sequentially selected by sliding a color developing device for a plurality of colors. 6. A first electrostatic latent image carrier and a second electrostatic latent image carrier which rotate in contact with each other, the first electrostatic latent image carrier and the second static image carrier. And a developing unit composed of a color developing device of a plurality of colors arranged in proximity to each of the electrostatic latent image carriers, wherein the first electrostatic latent image carrier has a toner image of one color and the second electrostatic latent image carrier. A toner image of another color is formed on the electrostatic latent image carrier, and the toner image of one color formed on the first electrostatic latent image carrier is further changed to the second electrostatic latent image. 2 transferred to a carrier and formed on the second electrostatic latent image carrier
A color toner image is transferred to a recording sheet, and a different color developing device of one color in the developing means is sequentially provided for each rotation of the first and second electrostatic latent image carriers. A color image recording device characterized by being selected. 7. The developing means sequentially develops a color developing device for one color which is different from each other by rotation with respect to the first electrostatic latent image carrier and the second electrostatic latent image carrier. 7. The color image recording apparatus according to claim 6, wherein the color image recording apparatus is configured by an integrated type selected. 8. The developing means is configured to bring a retracted color developing device for a plurality of colors close to the first electrostatic latent image carrier and the second electrostatic latent image carrier. 7. The color image recording apparatus according to claim 6, wherein the color image recording apparatus is configured by an individual type that is sequentially selected. 9. The developing means sequentially selects the first electrostatic latent image carrier and the second electrostatic latent image carrier by sliding a color developing device for a plurality of colors. 7. It is configured by an individual type that is
The described color image recording apparatus. 10. The second electrostatic latent image carrier is constructed so that a charging means, an exposing means, a developing means, a discharging means, and a peeling means, which are arranged around the second electrostatic latent image carrier, can be collectively retracted. The color image recording apparatus according to claim 6, wherein 11. A first electrostatic latent image carrier and a second electrostatic latent image carrier that rotate in contact with each other, the first electrostatic latent image carrier and the second static image carrier. And a developing unit composed of a color developing device of a plurality of colors arranged in proximity to each of the electrostatic latent image carriers, wherein the first electrostatic latent image carrier has a toner image of one color and the second electrostatic latent image carrier. A toner image of another color is formed on the electrostatic latent image carrier, and toner images of respective colors are formed on the first electrostatic latent image carrier and the second electrostatic latent image carrier. The first
Of the electrostatic latent image carrier and the second electrostatic latent image carrier are transferred to both sides of the recording paper, and the first and second electrostatic latent image carriers are rotated. The color image recording apparatus is characterized in that different color developing devices of different colors in the developing means are sequentially selected each time.