JPS60201363A - Recorder - Google Patents

Abstract

PURPOSE:To realize the functions of a copying machine, printer, and trimming copying machine with an inexpensive and small-sized device by providing a mechanism to control selectively corona ion current before starting the process for the electrophotographic recording to irradiate a light image onto a photosensitive body. CONSTITUTION:Corona charge is applied uniformly on a photosensitive drum 1 when all of ion current control electrodes 23, 24 are turned on to permit passage of ion current. An electrostatic latent image is formed on the drum 1 when the light reflected from an original 4 is irradiated thereon. The image is copied by the process of developing, transferring and fixing. A pulse voltage is impressed on the electrodes 23, 24 from a writing control circuit 27 to control the ion current by said electrodes according to the writing signal, thus forming the electrostatic latent image on the drum 1. The recording corresponding to the writing is executed by the process of developing, transferring and fixing without irradiation of light in the succeeding copying mechanism I. The electrostatic charge image in the region desired to be trimmed of the original 4 is formed on the drum 1 by subjecting the region on the drum 1 corresponding to the region desired to be trimmed of the original 4 to corona discharge by the electrodes 23, 24 and irradiating the light reflected from the original 4 on the drum.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a recording device [K] that can realize a copying function, a printer function, and a trimming copying function with a small device.

[Prior art]

Figure 1 shows an example of a conventional recording device of this type.
1 is a photosensitive drum; 2 is a corona charger for uniform charging; 3 is an optical system for forming an image of reflected light from a copying original on the photosensitive drum 1; 4 is a copying original; 5 is the original 4 〇 Also, 6 is a laser light source, 1 is a collimator optical system, 8 is a rotating mirror, and 9 is an FO lens, which makes the laser light from the laser light source 6 enter the photosensitive drum 1 [i
Perform I-include. 10 is a write control circuit, which controls light emission of the laser light source 6 according to a write signal.

11 is a developing device that visualizes the electrostatic charge image; 12 is a recording paper;
13 is a transfer device that generates corona to transfer the toner image onto the recording paper 12; 14 is a fixing device that fixes the toner image on the recording paper 12; 15 is an erasing lamp; and 16 is a component that remains on the photosensitive drum 1. This is a cleaning device for toner images.

And light source 5. The electrophotographic copying mechanism ■ with optical system 3,
Also, write control circuit 10. Laser light source 6°; remeter optical system 71 rotating mirror 8. The FO lens 9 constitutes a writing mechanism (2).

K, which operates this, uniformly charges the photosensitive drum 1 with the corona charger 2. Next, the reflected light from the original 4 is imaged on the photosensitive drum 1 by the first photographing mechanism ■, and an electrostatic positive image of the original 4 is formed. Next, the writing mechanism ■ on the photosensitive drum 1 is used to Write.

In this way, the electrostatic 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.

Further, the toner image remaining on the photosensitive drum 1 is cleaned by an erasing lamp 15 and a cleaner 16, and the above process is repeated again.

The conventional recording device with the above configuration has two optical systems: the optical system 3 of the copying mechanism (2) and the optical system of the writing mechanism (2) (collimator optical system 79 rotating mirror 8, FO lens 9), so it has a copying function. Although it can function as a printer, it has the disadvantage that the scanning system using laser light is expensive and large.

[Summary of the invention]

In order to eliminate these drawbacks, the present invention provides a mechanism for selectively controlling the corona ion flow before performing an electrophotographic recording process in which a light image is irradiated onto a photoreceptor. Hereinafter, the present invention will be described in detail with reference to the drawings.

[Embodiments of the invention]

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

In this figure, reference numeral 20 denotes a charging writing mechanism, and an ion flow control type charging writing mechanism is shown as an example. Other same reference numerals as in FIG. 1 indicate the same things.

The difference from the conventional recording apparatus shown in FIG. 1 is that the writing mechanism (2) and the corona charger 2 are removed, and a charging write mechanism 20 is placed in the position of the corona charger 2.

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

In FIG. 3, 21 is a corona wire, 22 is an ion flow focusing ill pole, 23.24 is an ion flow control electrode, 25.
26 is a power supply, and 21 is a write control circuit. Note that FIG. 3 shows the ion flow control voltages 423 and 24 for one pixel, and in reality, a large number of them are formed in the sub-scanning direction (direction perpendicular to the plane of the paper).

To explain its operation, a high voltage is applied to the corona wire 21, "corona ions are generated, and the ion flow focusing electrode 22
to converge the corona ions, and apply an ion flow control electric current
, 24 to form a static charge image on the photosensitive drum 1 by controlling the flow of corona ions by applying pulse voltages to the write control circuits @21 and 24. This allows the necessary writing to be performed. Then, when an electric field that accelerates the flow of corona ions is generated from the write control circuit 27 with a polarity voltage such as that generated in the ion flow control voltages 423 and 24, the photosensitive drum 1 is uniformly charged. do. That is, the charging writing mechanism 20 has a writing function as shown in FIG. The operation of the embodiment of FIG. 2, which has the same uniform charging function as the charger 2, will now be described.

In this invention, there are basically three modes: a copying machine mode, a printer mode, and a trimming copying machine mode.

(1) Copying machine mode All of the ion flow control electrodes 23 and 24 in FIG. 2 are turned ON, that is, the ion flow is set to the passage port Ifil. As a result, the photosensitive drum 1 is uniformly charged with corona, and then when the photosensitive drum 1 is irradiated with light reflected from the original 4, an electrostatic latent image force Zj is generated. Copies are then made through development, transfer, and fixing processes.

(II) Ion flow control mode m23.2 in printer mode Figure 2
4, an electrostatic latent image is formed on the photosensitive drum 1 under control according to the write signal.

In the next copying mechanism I, recording with improved writing is performed without irradiating light, through development, transfer, and fixing processes.

all) Ion flow control electrodes 23, 24 and 5 in rimming copier mode Fig. 2
444 photosensitive drum 1 corresponding to the area to be trimmed
Perform corona charging on the upper region. Next, the photosensitive drum 1 is irradiated with the reflected light from the source s4.

Then, an electrostatic charge image of the area of the document 4 to be trimmed is formed on the photosensitive drum 1. Copying power is then applied by developing, transferring and fixing this electrostatic charge image.

In the above embodiment, the photosensitive drum 1 is used, but generally any photoreceptor may be used. [Effects of the Invention] As explained in detail above, the present invention uses a method in which corona ion flow is applied to the photoreceptor. selectively control to form an electrostatic charge image, or
Since a charging writing mechanism for uniformly charging is provided, it has the excellent advantage that the functions of a copying machine, a printer, and a trimming copying machine can be realized with a small and inexpensive device.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing an example of a conventional recording device 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 shown in FIG. In the figure, 1 is a photosensitive drum, 2 is a corona charger, 3 is an optical system, 4 is a document for copying, 5 is a light source for irradiating the document,
11 is a developing device, 12 is a recording paper, 13 is a transfer device, 14 is a fixing device, 15 is an erasing lamp, 16 is a cleaning device, 20 is a charging/writing mechanism, 21 is a corona beam, 22 is an ion current focusing electrode, 23 and 24 are electrodes for controlling ion flow, 2s and 26 are power supplies, and 21 is a write control circuit. Figure 3

Claims (1)

[Claims] a photoconductor, a charging writing mechanism that selectively controls the flow of corona ions on the photoconductor to form an electrostatic charge image or uniformly charge the photoconductor, and a subject for irradiating a light image onto the photoconductor. A recording device comprising a copying mechanism, a developing device, a transfer device, and a fixing device.