JPS5979771A - Electrostatic recording head - Google Patents

Abstract

PURPOSE:To make the titled recording head adaptable to a hard recording body based on a metal drum without using a charge corotron, by forming the main electrode and the control electrode of an electrostatic recording head on a thin metal plate. CONSTITUTION:An electrostatic recording head 10 is constituted from a thin base metal plate 1 comprising phosophorus bronze, an insulating layer 2 comprising polyimide resin for covering the entire region of the single surface thereof, an integrated circuit 2 for a stylus drive circuit fixed on said insulating layer 2, lead electrodes 5 connected to said circuit 2 at predetermined intervals and provided with recording electrodes 4 at the leading end parts thereof, control electrodes 7 opposed to the recording electrodes 4 and respective insulating layers 6, 8. In this case, because the leading end part of the head 10 is attached to a hard recording body 9 so as to be contacted therewith by a proper elastic force and the metal plate 1 is flexibly contacted with said recording body 9 as a leaf spring, damage is not generated. In addition, because the control electrodes are provided, it is unnecessary to perform charging prior to recording and a charge corotron is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrostatic recording head in which a main electrode and a control electrode are formed on a thin metal plate so that it can be used even with a hard recording medium.

As a conventional electrostatic recording head, for example, a large number (e.g., 8 lines per line) of insulating coated wires are arranged in rows;
Some use a single row of multi-needle electrodes whose surroundings are hardened with epoxy resin.

In the above configuration, the tip of the recording head is brought close to the moving insulating recording paper surface, and a voltage according to input information is distributed to each of the wires by a distribution circuit, and an electrostatic charge is applied to the recording paper according to the information. By developing this with fine powder, a visible record can be obtained.

However, in conventional electrostatic recording heads, the wire is a hard stylus hardened with resin, so the recording medium is limited to soft materials such as paper and film.

The present invention has been made in view of the above, and has a main electrode and a control electrode formed on a thin metal plate in order to be applicable to a hard recording medium based on a metal drum or the like without using a charge corotron. The present invention provides an electrostatic recording head that has the following features.

Hereinafter, the static KC recording head according to the present invention will be explained in detail.

4j'71 and FIG. 2 show an embodiment of the present invention,
A base metal plate 1 made of a thin plate of phosphor bronze or the like having a required size, an insulating layer 2 of polyimide resin or the like to which a force 1a is applied to the entire surface of one side of the base metal plate 1, and a base metal plate 1 fixed on the insulating layer 2. Pressure is marked on each stylus according to input information)
(a driver circuit integrated circuit (IC) 3 connected to the integrated circuit 3 at a predetermined interval, and a predetermined length thereof is insulated)
Recording electrodes 4 are fixed on the rj2 by photo-etching or plating and are arranged in a line at the tip.
an insulating layer 6 covering the entire area of the lead electrode 5 except for the recording electrode 4;
arranged parallel to the rows of l! It is composed of a control electrode 7 connected to the Q'F il+υ circuit 3 and an insulating layer 8 covering the control electrode 7.

The base metal plate 1 is made of a material such as phosphor W copper, which has excellent flexibility.
0 μ? ? ! The thickness of the insulating layer 2 is 20 μm.
The thickness can be measured in μm. Furthermore, record 'r+L pole 4 is 16 dots)/
rra, 40 μmφ, and 3 μm thick. In addition, for both the lead '[1 (5), the recording electrode 4 and the control electrode 7, nickel is evaporated on the entire surface of the insulating layer 2, and this is coated with a resist, exposed to light using a photomask, and the resist is removed. 30 by etching
The width is μtn and the thickness is approximately 3 μm. Note that the size of the control electrode 7 is approximately six inches wide, and the length is slightly longer than the width of the recording paper.

In the above configuration, the tip portion (recording electrode 3 and control electrode 7) of the electrostatic recording head 1o in the unfolded state as shown in FIG. Mounted so as to make forceful contact. Because of this structure, the base metal 4 plate 1 has a function similar to a leaf spring, and the stylus and the recording medium come into contact with each other flexibly, so that the stylus and the recording medium are not damaged. Further, by providing the control electrode, there is no need to charge the recording medium before recording, and there is no need to provide a charge corotron. Furthermore, if the control electrode is divided and scanned, the stylus drive circuit's 4'
i' can be abbreviated as (t+'j).

FIG. 4 shows an example of a recording device 1'C using the 111p electric recording head of the present invention, in which the Z5F is mounted on the surface of the drum.
This is a case where an electrostatic charge is applied to a printed recording medium using the static charge 111 and the recording head according to the present invention. Recording machine (1 “1 effect”)
1. Aluminum is made into a cylindrical shape and a resistance layer (carbon +
A drum 12 is provided with a recording body 11 formed by providing a binder coat (20 μm thick) and a dielectric layer (5 μm polyester 4+7J resin) on its surface, and a keyer 13 for driving the drum 12. , a developing device 14 that attaches two-component powder (toner) to the surface of the recording medium 11 according to the surface charge, and a transfer corotron that attaches (transfers) the toner attached to the surface of the recording medium 11 to the plain paper 15. 15 and
A cleaner 17 that removes toner adhering to the optical surface of the drum after the transfer is completed, and an erase corotron 18 that removes the electric charge from the recording medium 11 cleaned by the cleaner 17.
Toyo V) fin is made. Each of the above-mentioned devices and the electrostatic recording head 10 is controlled by the control section 20 or O'', and the 741K dynamic circuit 30 controlled by the 1iil control section.
It is moved by 11 times.

The control unit 20 receives recording signals, console key outputs, and outputs from various sensors and switches as input 117 reports, converts them into predetermined digital signals, and outputs them to the -C path line 21 through an input interface 22 and an input interface 22 which outputs the signals to a C path line 21 according to a predetermined sequence. A ROM 23 stores a program for pruning the four recording mechanisms and distributing voltage to the stylus according to a recording signal for the electrostatic recording head 1o, and performs necessary calculations, judgments, and controls according to the program in the ROM 23. A CPU 24 that outputs commands, a sword W25 that temporarily stores calculation results and input information by the CPU 24, and a CPU 24 that outputs commands.
It is also configured with an output interface 26 that outputs the 1itlJ command from U24 to the outside.

The integrated circuit 1 distributes voltage to each stylus (recording IE pole 4) of the electrostatic recording head 10 according to the input information (it has an inert function, and its configuration is as shown in FIG. 5). , control section 2
The image signal DS from 0 to 1 is divided into 1 and 1 rows. A shift register 41 that latches the contents of the register 41, a latch circuit 42 that latches the contents of the register 41, and an enable signal ES (outputted from the control unit 20) that outputs the signal latched in the latch circuit 42.
A gate circuit 43 for outputting an output according to the output voltage and high voltage drive transistors 441 to 44n provided in one-to-one correspondence to each of the recording electrodes 4 are formed. When creating the i1f product circuit 1, the high voltage drive transistor 44! ~44n are made in VMOS process, and the other devices are made in CMOS process. Specifically, one chip will have 64 pit grooves and will be manufactured using a ceramic chip carrier system.

In the above (() configuration, the drum 12 whose surface charge has been made zero by the erase corotron 18 is rotated while being controlled by the controller 20 at a peripheral speed, and electrostatic recording is performed at the position of the electrostatic recording head 10. In the electrostatic recording head 10, a DC voltage (for example, +400v) is applied to the control electrode 7,
In addition, to the recording 'E pole 4, one line of voltage is simultaneously distributed to each stylus by the image signal DS and enable signal ES output from the control unit 20 (for example, 11
V, a pulse of 100 μs is applied), recording body 11
create a latent image. Next, the toner is applied with the acupuncture device 14 to obtain a visible image, and then, at the installation position 1δ of the transfer corotron 16, the transfer corotron 16 applies the toner to the plain paper 15 that is fed in synchronization with the rotation of the drum 12. Transfer of the visible image is effected by an applied high voltage (eg -5 kV). The transferred plain paper 15 is fed out of the recording apparatus, and the drum 12 is cleaned by a cleaner 17, and the static charge on the recording medium 11 is erased by an erase corotron 18 using an AC corotron.

The inventors checked the wear of the stylus and recording medium in the 11 compositions shown in Fig. fh4, but the B4J
No wear was observed even after recording 100,000 sheets of ll, i'lt, and no firing occurred.1. Practicality of IIj 4
I was able to edict nm.

As stated above, the present invention is clear: ice
Since the main electrode and control electrode are formed on the gold tip 4 thin plate, the recording head may be distorted due to the fact that the main electrode and control electrode are formed on the gold tip 4 thin plate.
Can be used for self-recording. Further, since the control electrode is provided, the recording device Mi- can be constructed as 11.I without using a charge corotron.

4. Detailed explanation of the invention Figure 1 is a plan view showing one embodiment of the invention, and Figure 2 is a plan view showing one embodiment of the invention.
A sectional view taken along the line A-A of the embodiment shown in the figure, FIG. 3 is an i! , I, j, tlJi side view, Fig. 4 shows an example of the recording device used in the Shiz'lit ti self-record of ``Unexploded''. FIG. 3 is a circuit diagram showing details of the integrated circuit according to the invention.

Code theory 1...Base metal plate, 2.6, 8...Insulating layer,
3... Integrated circuit for drive circuit, 4... Recording 1 [L
Pole, 5... Lead electrode, 7... Control electrode.

l] Applicant Fuji X-Nichix Co., Ltd. Agent Patent Attorney Shin Matsuhara, Toki, Seiji Muramoto, Taira 1) Tadano Ko, Yo Shima Jun - Same
6th birthday Thursday 5. i.

Claims (1)

[Scope of Claims] An electrostatic recording head that has a multi-needle electrode array and electrostatically records row by row in the horizontal direction of face recognition scanning by applying a voltage to the six needles according to recorded information, which has a predetermined size and thickness. an insulating layer of a required thickness provided on one side of the thin metal plate, a lead electrode fixed at a predetermined interval on the insulating layer and having one end connected to a drive circuit, and the other end of the electrode. Electrostatic recording characterized by comprising: a recording electrode provided on the recording electrode, a single or plural control electrodes arranged corresponding to the recording electrode, and an insulating layer covering the control electrode and the lead electrode. head 0