JPS6132069A - Recording device - Google Patents

Abstract

PURPOSE:To improve a recording speed by providing plural sets of writing heads and developing devices along its moving direction, on an adjacent position of a recording body, and also constituting said developing device of a white and black use developing device and a color use developing device. CONSTITUTION:First of all, the surface potential of a dielectric layer 1 is set to ''0''V by an erasing corotron 21, and thereafter, an electrostatic latent image of a cyan image is formed on the dielectric layer 1 by a writing head 3. In this case, passing and cutting-off of an ion current from an ion generator 15 are controlled and executed by applying an image signal of a cyan image to between control electrodes 18, 18 of the writing head 3 from a control voltage source 17, and forming a control electric field on the inside of an ion passing port 19 of a recording electrode 20. In the same way, toner images of magenta, yellow and black of the second, the third and the fourth colors are formed by writing heads 4, 5 and 6, and developing devices 8, 9 and 10 at the same time when the cyan toner image is formed, a color toner image of four colors is formed on a rotary drum 2, and it is transferred onto a copying form 23 by a transfer corotron 22, and thereafter, fixed by a fixing device 27.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a recording device capable of color copying, and particularly to a recording device capable of high recording speed.

[Conventional technology]

Conventionally, as a recording device equipped with a color copying function, the third
As shown in the figure, a black-and-white developing device (C) and a color developing device (dl (d) are arranged around the photosensitive tram (bl) installed inside the apparatus body (a+), and the paper feed It is known that a bias transfer roll (f+) is installed, which wraps the copy paper sent out from the device ('e') and transfers the toner image formed on the photosensitive drum (BL) onto the commie paper. .

In order to make a color copy using this device, the color image of the color original (g) is separated by a color separation filter (hl) to form a first color latent image on the photosensitive drum (bl). Convert the image to a color developer (d) that corresponds to this color.
The toner image is developed into a color toner image, and this toner image is transferred onto copy paper on the bias transfer roll ffl to form a first color.

Next, through similar steps, the second color toner image and the third color toner image are sequentially transferred onto the copy paper in register to form a color toner image, which is fixed by a fixing device (41) to obtain a color toner image. It was something.

[Problem that the invention seeks to solve]

Therefore, in the conventional recording apparatus of this type, when making a color copy, the photosensitive tram (b) is rotated three or four times to transfer the toner image formed on the drum (bl) onto the bias transfer roll (f). Since it is necessary to transfer the image onto copy paper, there is a drawback that the recording speed becomes extremely slow.

[Means and operations for solving the problems] The present invention aims to solve the above-mentioned problems of the conventional recording device capable of recording a thin layer. The object of the present invention is to provide a recording device that increases the recording speed by utilizing the following.

That is, the present invention provides an ion generator and an ion ejection side provided in the vicinity of a recording medium that moves in a certain direction,
An electrostatic latent image writing head consisting of a recording electrode having an ion passage opening through which ions generated by an ion generator pass is provided, and an image signal is applied to the recording electrode of this writing head. In a recording apparatus that forms an electrostatic latent image on the recording medium by controlling the ion flow passing through the ion passage port, and develops the electrostatic latent image with a developing device to obtain a visible image, By arranging a plurality of sets of writing heads and developing devices at nearby positions along the direction of movement thereof, and by configuring the developing devices with a black and white developing device and a color developing device, it is possible to write onto the recording medium. The required number of separated color toner images can be simultaneously formed, thereby significantly increasing the recording speed.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the recording device of the present invention includes a rotating drum (2) having a dielectric layer (1) on its surface, It is composed of four electrostatic latent image writing heads (31+41 +51 +61) and the same number of developing units +71 +81 (91+10) arranged in the vicinity.

First, the rotating drum (2) is made of a cylindrical core metal (2) which is rotatably supported in the direction of the arrow, as shown in Figs.
11) and a dielectric layer (1) formed on the surface of this core bar (11), and is configured so that latent image charges are held in this dielectric layer (1).

On the other hand, the electrostatic latent image writing head [3+ +41 (51+
6), as shown in FIG. 2 (writing heads other than (3) are not shown), has a metal housing (12) with the ion flow side open, and is suspended within this housing (12), An ion generator (15) consisting of a corona wire (14) connected to a DC high-voltage power supply (13) to generate corona ions, and an insulating plate (15) disposed on the ion outflow side.
6), and a control voltage source t171 is formed on both sides of the control voltage source t171.
A control electrode (181 (1
8+, and an ion passage port (19) for passing ions generated by the ion generator (15).
) and recording electrodes @ ).

In Figures 1 and 2, (c) is an eraser for removing charges remaining in the dielectric layer (1) of the rotating drum (2).
1- Zucorotron, (A) is a transfer corotron for transferring the toner image formed on the rotating drum (2) onto copy paper, (C) is a copy paper peeling claw, (C)
(c) shows a cleaner for removing toner remaining on the rotating drum (2), and (c) shows a paper feeding device.

Then, use this recording device to make a color copy:
First, the erase corotron Qυ sets the surface potential of the dielectric 1 (1) to OV, and then the write head 3)
An electrostatic latent cyan image is formed on the dielectric layer (1).

That is, as shown in FIG.
A control voltage source (17
) by applying a cyan image image signal to form a control electric field inside the ion passage port (19) of the recording electrode @) to control passage and interruption of the ion flow from the ion hair generator (15). An electrostatic latent cyan image is formed on the dielectric layer (1), and this latent image is developed by a cyan toner developer (7) to form a first color cyan toner image.

Similarly, a second color magenta toner image, a third color yellow toner image, and a fourth color black toner image are transferred to the cyan toner by the writing head +41 (51 (61) and the developing device 81 +91 (10). At the same time as the image is formed, a four-color toner image is formed on the rotating drum (2), and after this is transferred onto the copy paper web by the transfer corotron (A), the image is transferred by the fixing device (A). It's something you get when you stick to it.

On the other hand, after the residual toner is removed from the rotating drum (2) by a cleaner (c), the erase corotron t
2]), residual charges are removed and the recording is performed for the next recording.

In this way, this recording device has four writing heads +31 [41+51 +61 and four developing units +7
1 [81 (9100), it is possible to simultaneously form four color toner images on the rotating drum (2), making color copying possible with just one rotation of the rotating drum (2), significantly increasing the recording speed. It can be sped up.

In this embodiment, four sets of writing heads and developing devices are provided, but depending on the application, two, three, or five or more sets may be provided. Alternatively, a writing head and developer capable of forming a half-tone latent image may be used.

In addition, in this embodiment, the initial surface potential of the dielectric layer (1) is set to Ov by the erase corotron Qυ. A precharge corotron (not shown) may be provided to arbitrarily adjust the initial surface potential of the dielectric layer.

Furthermore, in this embodiment, a color toner image is formed on the rotating drum (2), and this toner image is transferred to the copy paper (
(a) to obtain a color copy, but the rotating drum (2) may be replaced with a rotating heald. A configuration may also be adopted in which a latent image is directly formed thereon and developed with toner to obtain a color copy.

〔Effect of the invention〕

As described above, the present invention forms an electrostatic latent image on a recording medium using an electrostatic latent image writing head consisting of an ion generator and a recording electrode, and develops this using a developer to obtain a visible image. In the recording apparatus, a plurality of sets of writing heads and developing devices are arranged near the recording medium, and the developing devices are composed of a black-and-white developing device and a color developing device, so that the required number of developing devices is increased. Separated color toner images can be simultaneously formed on the recording medium.

Therefore, this recording speed can be significantly improved, and the practical effect is extremely large.

[Brief explanation of drawings]

1 and 2 show embodiments of the present invention.
FIG. 2 is an explanatory diagram of the recording apparatus of the present invention, FIG. 2 is a partially enlarged explanatory diagram thereof, and FIG. 3 is an explanatory diagram of a conventional recording apparatus equipped with a color copying function. [Code explanation]

Claims (1)

[Claims] A stationary station is installed in the vicinity of a recording medium that moves in a certain direction, and consists of an ion generator and a recording electrode that is provided on the ion ejection side and has an ion passage opening for passing ions generated by the ion generator. An electrostatic latent image writing head is provided, and an electrostatic latent image is formed on the recording medium by applying an image signal to a recording electrode of the writing head to control the ion flow passing through the ion passage port. In a recording device which obtains a visible image by developing it with a developing device,
A plurality of sets of the writing head and developing device are arranged near the recording medium along the direction of movement thereof, and the developing device is composed of a monochrome developing device and a color developing device. recording device.