JPH0616196B2 - Recording device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus capable of realizing a copying function, a printer function, and a trimming copying function with a small apparatus.

[Prior art]

FIG. 1 shows an example of a conventional recording apparatus of this type.
Reference numeral 1 is a photosensitive drum, 2 is a corona charger for uniform charging, 3 is an optical system for focusing reflected light from a copying original on the photosensitive drum 1, 4 is a copying original, and 5 is the original 4 Is a light source for irradiating. Further, 6 is a laser light source, 7 is a collimator optical system, 8 is a rotating mirror, and 9 is an FO lens, and laser light from the laser light source 6 is incident on the photosensitive drum 1 to perform writing. A writing control circuit 10 controls the light emission of the laser light source 6 in accordance with the writing signal.

11 is a developing device for visualizing an electrostatic charge image, 12 is recording paper,
13 is a transfer device for generating a corona for transferring the toner image onto the recording paper 12, 14 is a fixing device for fixing the toner image on the recording paper 12, 15 is an erasing lamp, 16 is left on the photosensitive drum 1. It is a cleaning device for the toner image.

The electrophotographic copying mechanism I using the light source 5 and the optical system 3
A writing mechanism II is composed of the writing control circuit 10, the laser light source 6, the collimator optical system 7, the rotating mirror 8 and the FO lens 9.

To operate this, the corona charger 2 uniformly charges the photosensitive drum 1. Next, the light reflected from the original 4 is imaged on the photosensitive drum 1 by the copying mechanism I to form an electrostatic positive image of the original 4.

Next, the required writing is performed on the photosensitive drum 1 by the writing mechanism II.

In this way, the electrostatic charge image formed on the photosensitive drum 1 is developed by the developing device 11, transferred to the recording paper 12 by the transfer device 13, and fixed by the fixing device 14. In addition, the photosensitive drum 1
The toner image remaining on the top is cleaned by the erasing lamp 15 and the cleaning device 16, and the above steps are repeated again.

The conventional recording apparatus having the above-described configuration is the optical system 3 of the copying mechanism I.
And the two optical systems of the writing mechanism II (collimator optical system 7, rotating mirror 8, FO lens 9),
Although it can perform a copying function and a printer function, it has a drawback that the scanning system using laser light is expensive and large.

[Outline of Invention]

The present invention is provided with a mechanism for selectively controlling the corona ion flow before the electrophotographic recording process of irradiating a light image on the photoconductor in order to eliminate these defects. Hereinafter, the present invention will be described in detail with reference to the drawings.

Example of Invention

 FIG. 2 is a block diagram showing an embodiment of the present invention.

In this figure, reference numeral 20 denotes a charging / writing mechanism, which shows an ion flow control type charging / writing mechanism as an example. Other reference numerals that are the same as those in FIG. 1 indicate the same elements. The difference from the conventional recording apparatus of FIG. 1 is that the writing mechanism II and the corona charger 2 are removed, and the charging / writing mechanism 20 is arranged at the position of the corona charger 2.

An example of the charging writing mechanism 20 will be described with reference to FIG.

In FIG. 3, 21 is a corona wire, 22 is an ion flow converging electrode, 23 and 24 are ion flow control electrodes, and 25 and 26.
Is a power supply and 27 is a write control circuit. Note that FIG. 3 shows the ion flow control electrodes 23 and 24 for one pixel, and in reality, a large number of electrodes are formed in the sub-scanning direction (direction perpendicular to the paper surface).

The operation will be described. A high voltage is applied to the corona wire 21 to generate corona ions, and the ion flow focusing electrode 22
To focus the corona ions, and the ion flow control electrode 23,
By applying a pulse voltage from the writing control circuit 27 to 24, the flow of corona ions is controlled to form an electrostatic charge image on the photosensitive drum 1. As a result, required writing can be performed. When the writing control circuit 27 generates a voltage having a polarity such that an electric field that accelerates the flow of corona ions is generated in the ion flow control electrodes 23 and 24, the photosensitive drum 1 is uniformly charged. That is, the charge writing mechanism 2
0 has the same uniform charging function as the corona charger 2 of FIG. 1 in addition to the writing function.

Next, the operation of the embodiment shown in FIG. 2 will be described. In the present invention, there are basically three copying machine modes: a printer mode, a trimming copying machine mode. This will be sequentially described below.

() Copying machine mode All the ion flow control electrodes 23 and 24 in FIG. 2 are turned on, that is, the ion flow is allowed to pass. As a result, corona charging is uniformly performed on the photosensitive drum 1, and then the original 4
When the photosensitive drum 1 is irradiated with the reflected light from, an electrostatic latent image is formed. After that, copying is performed through the processes of development, transfer and fixing.

() Printer mode In FIG. 2, the ion flow is controlled by the ion flow control electrodes 23, 2
Controlled in accordance with the write signal at 4, an electrostatic latent image is formed on the photosensitive drum 1.

In the next copying mechanism I, recording according to writing is performed by developing, transferring and fixing processes without irradiating light.

() Trimming copier mode The original 4 with the ion flow control electrodes 23 and 24 in FIG.
Corona charging is performed on the area on the photosensitive drum 1 corresponding to the area to be trimmed. Next, the photosensitive drum 1 is irradiated with the reflected light from the original 4. Then, the original 4 is placed on the photosensitive drum 1.
An electrostatic charge image of the area you want to trim is created. After that, the electrostatic charge image is developed, transferred, and fixed to perform copying.

It should be noted that although the photosensitive drum 1 is used in the above embodiment, it may be any photosensitive member in general.

〔The invention's effect〕

As described in detail above, the present invention selectively controls the corona ion flow on the photoconductor to form an electrostatic image.
Since the charging / writing mechanism for uniformly charging is provided, it has an excellent advantage that the function of a copying machine, the function of a printer, and the function of a trimming copying machine can be realized by an inexpensive and small device.

[Brief description of drawings]

FIG. 1 is a block diagram showing an example of a conventional recording apparatus of this type,
FIG. 2 is a block diagram showing an embodiment of the present invention, and FIG. 3 is a block diagram showing an example of a charging writing mechanism used in the embodiment of FIG. In the figure, 1 is a photosensitive drum, 2 is a corona charger, 3 is an optical system, 4 is an original for copying, 5 is a light source for illuminating the original, 11 is a developing device, 12 is recording paper, and 13 is a transfer device. 1
Reference numeral 4 is a fixing device, 15 is an erasing lamp, 16 is a cleaning device, 20 is a charging / writing mechanism, 21 is a corona wire, 22 is an ion flow focusing electrode, 23 and 24 are ion flow control electrodes, and 25 and 26 are power supplies. , 27 are write control circuits.

Claims (1)

[Claims] 1. A photoconductor, a charging / writing mechanism for selectively controlling the flow of corona ions on the photoconductor to form an electrostatic charge image or to uniformly charge the photoconductor, and a photoconductor on the photoconductor. A recording apparatus comprising a copying mechanism for irradiating an image, a developing unit, a transfer unit and a fixing unit.