JPS5953878A - Recording device - Google Patents

Abstract

PURPOSE:To obtain an electric signal image superposed on an exposure electrostatic positive image by exposing an original to be copied and forming an electrostatic positive image, then drawing a static charge image by the electric signal. CONSTITUTION:A photosensitive drum 1 is electrostatically charged uniformly by an electrostatic charger 2 and exposes the original 4 by an optical system 3 to form the electrostatic positive image. The electrostatic image is superposed on the image by an electrostatic image writing mechanism 6 and they are developed by a developing mechanism 8 to transfer a toner image to a form 9. An ion flow control type electrostatic image writing mechanism impresses a high volage to a corona 13 to generate corona ions, which are converged by an electrode for ion flow convergence; and a pulse voltage is impressed to an electrode 15 for ion flow on-off control from a voltage generating circuit 16 to control the ion flow, forming the static charge image on the drum 1. Only the electric signal of the mechanism 6 may be used only for the exposure copying of the original 4 to form an image.

Description

[Detailed Description of the Invention] This invention relates to a recording device that has both the functions of a copying machine and a printer, and is also capable of recording electrical signals from a computer in the margins while copying. It is related to the device.

This conventional rod device # reads the original with an image reader, converts it into an electrical signal, synthesizes an electrical signal for recording from the 4g number and a signal from a computer, etc., and uses the synthesized electrical signal to connect the multi-needle electrode. control and record electrostatically, or
Alternatively, lasers were controlled by the synthesized electrical signals to perform electrophotographic recording.

Another method using an image reader is the film overlay method. In this method, a negative film of the original is prepared, and between corona charging and development of the photoreceptor, the photoreceptor is irradiated with light transmitted through the negative film and light such as a laser, respectively, to perform recording.

Therefore, in the method using an image reader,
I converted the original into an electrical signal using an image reader, so
When reading, the resolution deteriorates and the equipment becomes bulky. In addition, the film overlay method has the disadvantage that it is necessary to create a film from an original, which takes time and steps.

In order to eliminate these drawbacks, the present invention is provided with an optical system that focuses reflected light from an original onto a photoreceptor, and a mechanism that writes an electrostatic charge image on the photoreceptor. The present invention will be described in detail below with reference to the drawings.

FIG. 1 shows an embodiment of the present invention, in which numeral 1 is a photosensitive drum, 2 is a corona charger for uniform charging, and 3 is a lens for forming an image of reflected light from a document for copying onto the photosensitive drum 1. , 4 is an original for copying, 5 is a light source for irradiating the original 4,
6 is an electrostatic image writing mechanism for writing an electrostatic charge image on the photosensitive drum 1; 1 is a control circuit for the electrostatic image writing mechanism 60; 8
1 is a developing mechanism for visualizing the electrostatic charge image; 9 is a recording sheet; 10 is a corona charger for transferring the toner image onto the sheet 9; 11 is a fixing device for the toner image on the sheet 9; and 12 is the photosensitive member. This is a cleaning mechanism for toner images remaining on the drum 1.

To operate this, a corona charger 2 is placed on the photosensitive drum 1.
It is uniformly charged. Using the same principle as that of a copying machine, reflected light from the original 4 is imaged onto the photosensitive drum 1 to form an electrostatic positive image of the original 4. Next, photosensitive drum 1
The electrostatic image writing mechanism 6 controls an electric signal to write an electrostatic image on the photosensitive drum 1 superimposed on the positive image above, that is, on the portion of the photosensitive drum 1 where the electrostatic charge has disappeared due to the formation of the positive image. Form the upper tail of drum 1. Next, the electrostatic charge image on the photosensitive drum 1 is developed by the developing mechanism 8. Next, the developed toner image on the photosensitive drum 1 is transferred onto a sheet of paper 9. The transferred toner image on paper 9 is fixed by fixing device 11, and recording is completed. Note that the toner image remaining on the photosensitive drum 1 is cleaned by the cleaning mechanism 12, and the process is repeated again.

Note that the method for forming an electrostatic charge image on the photosensitive drum 1 includes:
Although it is possible to use a multi-needle electrode, an ion flow control type electrode is more tolerant to variations in the distance between the photosensitive drum 1 and the electrostatic image writing mechanism 6, and has excellent halftone reproducibility. It's better.

FIG. 2 shows an example of an ion flow control type electrostatic image writing mechanism. In this figure, 13 is a corona wire, 14 is an ion flow focusing electrode, 15 is an ion flow on/off control electrode,
16 is a voltage generation circuit, and 17 and 18 are power supplies.

To operate this, a high pressure is applied to the corona wire 13 to generate corona ions, the ion flow focusing electrode 14 focuses the corona ions, and the ion flow on/off control electrode 15 generates a voltage. The flow of corona ions is controlled by applying a pulse voltage from the circuit 16 to the photosensitive drum 1.
An electrostatic charge image is formed on the surface.

Note that the ion flow focusing electrode 14 is provided to focus corona ions and increase the recording speed, and may be omitted in an apparatus with a slow recording speed.

In the above description, the operation of the apparatus has been described for the case where copying and electrical signal writing are performed at the same time, but this apparatus can also perform only copying, like a copier, or only write piezoelectric signals, like a printer.

As explained above, the present invention forms an image of reflected light from a copy original on a photosensitive drum to form an electrostatic bomb image, and then writes an electrostatic charge image using an electric signal. There is an advantage that it is possible to add an electric signal image to the copied image of the copied original, which was impossible with optical intimidation.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing an example of the electrostatic charge image writing mechanism of the present invention. In the figure, 1 is a photosensitive drum, 2 and 10 are corona chargers, 3 is a lens, 4 is a document, 5 is a light source, 6 is an electrostatic image writing mechanism,
T is a control circuit, 8 is a developing mechanism, 9 is paper, 11 is a fixing device, 12 is a cleaning mechanism, 13 is a copy line, 14 is an electrode for ion flow convergence, 15 is an electrode for controlling ion flow on/off, 16 is a voltage generation circuit, 1γ, and 18 are a power supply.

Claims (2)

[Claims] (1) A photoconductor, an optical system that forms an image of reflected light from a document onto the photoconductor, an electrostatic image writing mechanism that writes an electrostatic charge image onto the photoconductor, and a mechanism that develops the electrostatic charge image on the photoconductor. 1. A recording apparatus comprising: a mechanism for transferring a toner image developed on a photoreceptor onto a sheet of paper. (2) The recording apparatus according to claim (1), wherein the mechanism for writing the electrostatic charge image on the photoreceptor controls ion flow.