JPS5911258A - Electrostatic latent image writing apparatus for electrostatic recording - Google Patents

Abstract

PURPOSE:To provide the titled apparatus with a high recording speed which enables an intermediate recording with a low recording control voltage by converging an ion flow with a converging electrode arranged between an aperture electrode for controlling the ion flow and a corona wire. CONSTITUTION:A high voltage is applied to a wire 1 to generate an ion flow. The ion flow 4 running converges with a converging electrode 7 and is introduced to an ion controlling aperture electrode 2 with a higher ion density. When an ion passage forward electric field is formed in a hole 22 with electrodes 22 and 24 according to a control signal, the ion flow 4 is allowed to pass through the aperture electrode 2. When an ion passage backward electric field is formed according to the control signal, the ion flow 4 is blocked.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrostatic latent image writing device for electrostatic recording that is capable of low recording control voltage (halftone recording) and high recording speed.

FIG. 1 is an explanatory diagram of a conventional electrostatic latent image writing device of this type for electrostatic recording, in which 1 is a wire for generating corner ions, 2 is a seven pertier electrode for controlling ion flow,
3 is a voltage generation circuit for controlling the ion flow, 4 is an ion flow, and 5 is a copier charger. The structure of the aperture electrode 2 is that a hole 22 is formed in an insulating plate 21, and an electrode 23 is formed on one surface.
, an electrode 24 is provided on the other side, and both electrodes have holes formed therein that correspond to the holes 22 . A voltage from the voltage generating circuit 3 is applied between the electrodes 23 and 24. Note that a large number of holes 22 are formed along the length direction of the wire 1, and the electrode 23 is made of one conductive plate with holes formed to match the holes 22, and the electrode 24 is formed by forming holes in each hole 22. The electrodes 24 are provided independently from each other so as to surround the periphery of the electrode 24, and a voltage of voltage generation date W&3 is applied to each electrode 24.

In the above-mentioned conventional apparatus, the ion current 4 was controlled by the aperture electrode 2, and the ion current 4 was used to form a static current for recording, so the ion current 4 generated by copying was Because of the lack of speed, there was a drawback that the FFI speed change was slow.

In order to solve these drawbacks, this invention places an electrode with holes corresponding to the aperture electrode between the aperture electrode and the corona ion source, and applies a potential such that the ion flow converges on the 7-vertical electrode. This is what was applied. The invention will now be explained with reference to the drawings.

FIG. 2 shows an embodiment of the present invention, in which 6 is a power source for converging ion flow, T is an electrode for converging ion flow, and a hole 71 is formed in the center. The number of holes T1 is the same as the number of holes 22, and their centers are aligned, and the diameter φ5 of the hole 71 is about twice as large as the diameter φ1 of the holes 22. Other details are the same as in Figure 1.

To operate this, a high voltage is applied to wire 1 and the ion flow 4'? ! -Let it happen. Ion flow that started flowing out 4
The ions are focused by the focusing electrode 7 to increase the ion density, and are guided to the 7-percha electrode 2 for ion control.

In the aperture electrode 2, the control signal allows the ion flow 4 to pass if the ion flow forward direction electric field is formed in the hole 22 by the electrodes 2, 3 and 24, and vice versa. If an electric field is formed, the ion flow 4 is blocked.

As explained above, the ion flow 4 is transferred to the focusing chamber ff17.
The ions are converged and guided to the 7 aperture electrode 2, and the aperture electrode 2 controls the passage of the ion flow 4.
The ion density in the ion flow 4 increases, and the recording speed can be increased. In addition, the advantages of the ion flow control method, such as the fact that the control voltage can be low and the accuracy of the distance between the electrode and the writing target area are not strict, are maintained.

Furthermore, the focusing electrode T can be easily made by etching a hole in a thin plate made of stainless steel or the like, and has the advantage of having a simple structure.

The diameter φ of the hole 71 of the focusing electrode T is the diameter of the aperture electrode 2.
Since the diameter φ1 of the hole 22 is larger than that of the hole T1, the hole T1 cannot be formed correspondingly unless the holes 22 are spaced apart as much as possible (
Therefore, it is necessary to devise the arrangement of the holes 22. Here, an example is shown in FIG. 3(a).

Shown in (b). As shown in FIG. 3(a), holes 22 are arranged diagonally in the electrode 23. As shown in FIG. Further, as shown in FIG. 3(b), the electrodes 24 are provided independently surrounding the periphery 9 of each hole 22, and lead wires 25 are attached to each electrode. Corresponding to the arrangement of the hole 22 of the aperture electrode 2, the arrangement of the hole T1 of the focusing electrode T is also shown in FIG.
, so that adjacent electrodes can be formed without contacting each other, and the focusing electrode 7 can have a focusing effect. An experimental example of the convergence effect of the convergence electrode 7 is as follows.

The diameter φ1 of the hole 22 of the aperture electrode 2 is 100 to 400
μm, and placed at a convergence electrode 71 having a hole 11 with twice the diameter φb equidistant from this diameter φ, and a voltage of 5×10' V/ When an electric field of m was applied, the focusing effect was about 9 times greater than when the focusing electrode 7 was not provided.

FIG. 5 shows another embodiment of the aperture electrode 2.
This corresponds to FIG. 3(b). In this embodiment, the holes 22'4 are arranged on two diagonal straight lines. That is, in FIG. 3(b), the holes 22 are on one diagonal straight line, but every other hole is lowered downward and placed on another diagonal straight line. According to this embodiment, the distance between the holes 22 can be further increased, and therefore,
Even if the diameter of the hole T1 of the focusing electrode T is made large, there will be no problem.

The above experiment was conducted by applying a voltage of +6 KV to the wire 1 and measuring the current passing through the seven percha electrodes 2 with an electrometer. Further, by increasing the hole diameter of the focusing electrode 7 and the voltage applied thereto, further focusing is possible.

As explained above, the present invention provides seven
A converging electrode is placed between the pertier electrode and the corona wire to converge the ion flow, so the control voltage for recording is low. There is an advantage that an electrostatic latent image writing device for electrorecording can be realized with a simple mechanism.

[Brief explanation of the drawing]

Schematic diagrams of the configuration, FIGS. 3(a) and 3(b) are 7 of this invention.
Percha, front view and back view showing an example of electrode, 4th
This figure is also a plan view of the focusing electrode, and FIG. 5 is a back view showing another example of the aperture electrode. In the figure, 1 is a wire, 2 is an aperture electrode, 3 is a voltage generation circuit, 4 is an ion flow, 5 is a copier charger, 6 is an ion flow focusing electrode, γ is a focusing electrode, 21 is an insulating plate, 22 is a hole, 23 and 24 are electrodes, 25 is a lead wire, and T1 is a hole. Figure 1 Go to Figure 2 1

Claims (1)

[Claims] A focusing electrode having a hole diameter larger than the hole diameter is arranged between the corona ion generation source and the 7-pertier electrode that electrically controls the +2n ion flow, corresponding to the hole position of the 7-pertier electrode. An electrostatic latent image writing device for electrostatic recording, characterized in that a potential for converging the corona ion flow into the hole of the aperture electrode is applied to the focusing electrode.