JPH06227027A - Recording apparatus - Google Patents

Abstract

PURPOSE:To perform a minute recording on a large paper by using a control electrode plate with a size satisfying a yield which can keep the conventional mass production. CONSTITUTION:Recording head 21 and 22 each with a control electrode plate 2A with a width being smaller than the width of a paper 1 are provided in parallel with a recording line 1B and an aperture row 2A5 of the control electrode plate 2A of each of the recording heads 21 and 22 is provided in such a way that it is arranged without shortage and in the same space to the width to be recorded of the paper 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ion flow control type recording device.

[0002]

2. Description of the Related Art An ion flow control type recording apparatus is used for recording electrostatic recording paper through a large number of fine holes formed in a thin insulating substrate having control electrodes on both sides for ions generated by a corona charger. Irradiation forms a latent image, which is visualized with toner. The amount of ions applied to the electrostatic recording sheet can be controlled to be turned on and off by the relationship between the potentials given to the two control electrodes. Here, the substrate is referred to as a control electrode plate, and at least the control electrode plate and a corona charger are included, and sometimes a unit integrally configured including a drive circuit unit for applying a desired voltage to the control electrode is a recording head. Call.

First, the structure of the control electrode plate will be described with reference to FIG. 4A is a plan view of the control electrode plate 2A, FIG.
(B) is a side view showing a part of the same. In the figure, 2A1 is a substrate made of an insulating material, 2A2 and 2A3 are control electrodes, 2A4 is the substrate 2A1 and control electrodes 2A2 and 2A2.
It is a hole that penetrates A3 and is an aperture that serves as a passage for the ion flow. Explaining these in more detail, the substrate 2A1
One control electrode 2A2 is formed in a straight line on one side of the control electrode plate 2A, and control electrodes 2A3 corresponding to the number of apertures 2A4 are provided on the other side of the control electrode 2A2.
And are formed at regular intervals. Aperture 2A
The control electrodes 2A2 are arranged in a line in the center of the width of the control electrode 2A2, and similarly, the control electrodes 2A3 are arranged in the center of the width of the control electrode 2A3 at the same intervals as the control electrode 2A3.

Next, a method of controlling the ion flow will be described with reference to FIG. In FIG. 5, 2B is a corona charger, which is configured by the following parts. That is, 2B1 is a wire electrode of the corona charger 2B, 2B2 is also a shield electrode, and the recording head 2 is constituted by the control electrode plate 2A and the corona charger 2B. Reference numeral 1 is an electrostatic recording sheet (hereinafter simply referred to as a sheet). In FIG. 5A, the wire electrode 2B1 has a high positive voltage (for example, 3
KV), the corona discharge starts and the wire electrode 2
Ions 2D are generated around B1. At this time, control electrode 2
When A2 is connected to the positive pole of one power source and the control electrode 2A3 is connected to the negative pole, the ion 2C is
After passing through A4, the sheet 1 is irradiated with an ion stream.
However, as shown in FIG. 5B, the two control electrodes 2A2,
When the polarities of 2A3 are reversed, the ion flow becomes 2A.
4 is blocked. Utilizing this fact, if the amount of passage of the ion current is controlled for each aperture 2A4 by setting the passage time of 256 stages, for example, an electrostatic dot latent image is formed on the paper 1 with a charge amount of 256 stages. can do.

Next, the operation at the time of writing a latent image will be described with reference to FIG. The recording head 2 has a control electrode plate 2 at its tip.
A has a structure in which it is attached in a curved shape, and a corona charger 2B is fixed thereunder, and it has a drive circuit unit on both sides thereof or is connected to a drive circuit unit provided outside. Reference numeral 1A is a paper guide for keeping the distance between the paper 1 and the recording head 2 constant, and also serves as a counter electrode during writing. First, image information is sent from the control unit to the drive circuit unit of the recording head 2,
The aperture 2A4 (FIG. 4) is selected in a predetermined order.
Then, the grayscale information to be written in the aperture 2A4 is given as a time for allowing ions to pass through the aperture 2A4, and the two control electrodes 2A2 and 2A3 are given.
Polarity reversal is appropriately performed. When the writing for one line is completed, the sheet 1 is moved to the left by one dot, the writing is performed again, and this is repeated to form a latent image of one image on the sheet 1.

[0006]

The problem heretofore encountered is the increase in size of the control electrode plate 2A. As can be seen from the structure of the control electrode plate 2A described above, the control electrode plate 2A
Control electrodes 2A2, 2A3 and aperture 2A4 formed on
Requires precise microfabrication, and the production yield thereof generally becomes worse as the size of the control electrode plate 2A increases. Therefore, an object of the present invention is to provide a recording apparatus which uses a control electrode plate having a size which satisfies the yield which can maintain mass production in the related art and which can perform precise recording on a sheet by using this control electrode plate.

[0007]

According to the present invention, a recording device capable of printing on a large size sheet can be easily realized.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a plan view of a latent image forming portion of an ion flow control type monochrome recording apparatus according to the present invention, and FIG. 2 is a side view thereof. Reference numeral 1 is a sheet, 21 and 22 are recording heads having the same number of apertures, which are provided in parallel with the recording line 1B, and 2A5 is a portion where the apertures of the control electrode plate 2A are arranged, that is, an aperture row. 1
A is a paper guide.

To write a latent image, if the sheet 1 proceeds from right to left in the direction of the arrow, first, the recording head 22 takes charge of the upper half of the sheet 1 in the figure, and the information of the image and the text of that portion. Writing is started, and the beginning of the written portion on the paper 1 is the aperture array 2A of the recording head 22.
When the portion 5 is reached, that is, both recording heads 21 and 22
When the distance between the aperture portions is set to X cm and the paper 1 advances by X cm from the writing start of the recording head 22, the recording head 21 starts to operate and the information of the portion is written in the lower half of the paper 1 in FIG. Therefore, the recording head 22 and the recording head 21 are operated for a certain time T seconds, and compared with the case where one recording head capable of writing on the entire recording range of the sheet 1 is operated at the same writing speed. ,
It takes an extra T seconds. However, in the present invention,
Since a small recording head that is easy to manufacture can be used, precise recording can be easily realized.

It is desirable to design the two recording heads 21 and 22 so that the components are common to each other for various reasons, in particular, from the viewpoint of low cost of the apparatus. It goes without saying that pairs can also be used. As another embodiment, as shown in FIG. 3, even if the number of recording heads is 3, 22, or 23, the writing time is the same as the case of two.
Since the size of the device hardly changes, it is possible to use the most reasonable number according to the usage of the recording device.

[0011]

As described in detail above, the present invention is provided with a plurality of recording heads each having a control electrode plate having a width smaller than that of a recording sheet, the recording heads being provided in parallel with each other, and the control electrodes of each recording head. Since the apertures of the plate are arranged at the same intervals with respect to the width of the recording area on the recording paper, it is possible to use a recording head of a size that can be easily manufactured. Since recording can be performed on a large-sized sheet, there is an advantage that an inexpensive recording apparatus can be easily realized in consideration of the yield.

[Brief description of drawings]

FIG. 1 is a plan view showing the configuration of an embodiment of the present invention.

2 is a side view of the embodiment of FIG. 1. FIG.

FIG. 3 is a plan view showing the configuration of another embodiment of the present invention.

FIG. 4 is a plan view showing a structure of a control electrode plate used in the related art and the present invention and a side view showing a part of the control electrode plate in a cutaway manner.

5 is an explanatory view of a method of controlling an ion flow by the control electrode plate of FIG.

FIG. 6 is an explanatory diagram of conventional latent image writing by a recording head.

[Explanation of symbols]

 1 Paper 1A Paper Guide 1B Recording Line 2 Recording Head 21 Recording Head 22 Recording Head 23 Recording Head 2A Control Electrode Plate 2A1 Substrate 2A2 Control Electrode 2A3 Control Electrode 2A4 Aperture 2A5 Aperture Row 2B Corona Charger 2B1 Wire Electrode 2B2 Shield Electrode

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tanno Hoshino 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation

Claims (1)

[Claims] 1. A recording apparatus in which ions generated by a corona charger are controlled as an ion current by a control electrode plate of a recording head to form an electrostatic latent image on a recording sheet and developing with toner liquid or toner powder, A plurality of recording heads each having a control electrode plate having a width smaller than the width of the recording paper are provided in parallel to the recording line, and the aperture of the control electrode plate of each recording head is a range in which recording on the recording paper is to be performed. The recording device is arranged at the same intervals with respect to the width of the recording device.