JPS60164759A - Color picture recording device - Google Patents

Abstract

PURPOSE:To change a color by only replacing a unit, by forming a developing device and a toner replenishing device as one unit, providing a exclusive unit at every color, and constituting so that a selected unit can be attached and detached to and from the peripheral part of an image carrying body. CONSTITUTION:As for a photosensitive drum 1, the potential is held by a corona discharge of the first electrifier 2. It is exposed by a laser light from the first laser beam optical part 3, a latent image of the first color is formed, developed by the first developing device 4, and a toner image of the first color is formed on the photosensitive drum. The surface potential of the photosensitive drum 1 is corrected by the second electrifier 6, and thereafter, it is exposed by a laser from the second laser beam optical part 7, a latent image of the second color is formed, and a toner image of the second color is formed together with the toner image of the first color by the second developing device 8. The potential is corrected by an electrified potential correcting device 10 consisting of an eraser lamp and an electrifier, and a toner image of each color is transferred onto a form 12 by a transfer device 11, welded thermally to the form 12 fed by a sprocket wheel 13, by a fixing device 14, and printing is ended.

Description

Detailed Description of the Invention [Field of the Invention] The present invention relates to a color image recording device using an image carrier, for example, an electrophotographic recording device using a photoreceptor or an electrostatic recording device using a dielectric. .

[Prior art]

2. Description of the Related Art Devices using image carriers, such as electrophotographic recording devices using photoreceptors or electrostatic recording devices using dielectrics, are being developed into color devices and commercialized.

Conventionally, efforts have been made to make the colors closer to natural colors, and some results have been achieved. However, even if the colors were to be slightly changed, extensive modifications were required.

Recently, color printing has been studied in laser printers used as output devices for combiners, and in particular, the practical application of two-color printing is being pursued.

At this time, changes in color are required more than ever.

Until now, there was no device that took into account the ability of the operator to change the color.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a color image recording apparatus that can change the color according to the operator's request.

[Structure of the invention]

The present invention provides a color image recording apparatus comprising an image bearing member, a developing device for forming a toner image on the image bearing member, and a toner replenishing device that supplies toner to the developing device. The combination is made into a unit, and a dedicated unit is provided for each color in response to color changes, and a specific unit selected from among the multiple units is placed toward the periphery of the image carrier and placed on the front side of the main body of the device. This is a color image recording device characterized in that it can be inserted into and taken out from the camera.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing the principle of a two-color laser printer which is one embodiment of the present invention.

In FIG. 1, an image carrier, in this case a photosensitive drum 1, is used. Charge is injected into the drum 1 by corona discharge from a first charger 2, and the potential is maintained. It is exposed to laser light from the second laser beam optical section 3 to form a first color latent image, which is developed by the first developer 4 to form a first color toner image on the photosensitive drum. The first toner replenisher 5 replenishes toner to the first developing device.

After the surface potential of the photosensitive drum 1 is corrected by the second charger 6, it is exposed to laser light from the second laser beam optical section 7, a second color latent image is formed, and a second development process is performed. A second color toner image is formed by the container 8 together with the first color toner image. Toner is supplied to the second developing device 8 from a second toner replenishing device 9.

In order to correct the potential on the surface of the photoreceptor and the amount of charge of each color toner, a charge potential corrector 10 consisting of an eraser lamp and a charger performs correction, and the toner of each color is transferred onto the paper 12 by a transfer device 11. The paper 12 on which the image is transferred is transferred by the roller rocket foil 13 and is thermally fused by the fixing device 14 to complete printing. Since a small amount of toner remains on the photosensitive drum after transfer, the creep device 15 p)
remove the dye from the photoreceptor surface. Then, in order to eliminate the potential on the surface of the photoreceptor, it is exposed and erased using an eraser lamp 16. This completes the two-color image recording process.

Various such processes have been devised in the past, and there are various methods, but exchanging colors has been carried out. Particularly in the case of a two-bath system, color exchange is relatively easy. The developer and toner replenisher are also used for two-color printing using two baths on one photoreceptor, full color printing using three baths, and color image recording in which two photoreceptors are used to print one color each. It is sufficient if the switch can be easily replaced by the operator. Therefore, in the present invention, the developing device 4.8 and the toner replenishing devices 5, 9 are combined as a unit, and a dedicated unit is provided for each color in order to respond to changes in color. For each unit, the amount of charge and other characteristics of the toner are individually set depending on the color to be produced.

Then, a specific unit is selected from among the plurality of units according to the color to be printed, and the selected unit is inserted into and out of the apparatus body through an opening on the front surface of the apparatus main body toward the periphery of the photosensitive drum 10.

r ) Regarding replaceability from the front, the front refers to the operating surface of the device, and in the case of the laser printer shown in this figure, it is the surface perpendicular to the direction parallel to the photosensitive drum.

It is clear that the present invention can also be implemented in a color copying machine since it has developing devices for each color. , and also includes the paper cassette surface and the stacker surface from which sheets are taken out.

〔Effect of the invention〕

As explained above, the present invention includes a developing device and a toner replenishing device as a unit, and a dedicated unit for each color is provided.
Since the selected unit can be inserted and removed from the periphery of the image carrier, the color can be changed simply by replacing the unit without having to make extensive modifications to the device when changing the color. .

[Brief explanation of drawings]

FIG. 1 is a diagram showing the principle of a two-color laser printer which is an embodiment of the present invention. (6) ■... Photoreceptor, 2... First charger, 3... Second laser optical section, 4... First developer, 5... First toner replenisher, 6... ...Second charger, 7...Second laser optical section, 8...Second developer, 9...Second toner replenisher,
10...Charged potential corrector, 11...Transfer device, 12...
・Paper, 13...Suzorocket foil, 14...
-Fuser, 15...Cleaner device, 16...Eraser lamp. (7)

Claims (1)

[Claims] (1) In a color image recording device comprising an image carrier, a developing device that forms a toner image on the image carrier, and a toner replenisher that supplies toner to the developer, the developer and the toner replenisher A dedicated unit is provided for each color in response to color changes, and a specific unit selected from the plurality of units is placed in front of the main body of the device, facing the peripheral area of the image carrier. A color image recording device characterized in that it can be inserted into and taken out from the side, 2