JPS58173679A - Ink recording head - Google Patents

Abstract

PURPOSE:To facilitate the injection of ink and to simplify a drive circuit, in a recording head having plural electrodes arranged thereto and a slit like opening, by a method wherein the ink having magnetism is used and the electrodes are magnetically energized. CONSTITUTION:In the recording head having a slit like opening 1 and plural electrodes 8 arranged to the inner wall of the lower plate thereof in parallel relation to each other, as each electrode 8, one comprising a hard magnetic material and energized magnetically is used and, as an ink, one having magnetism imparted by mixing a magnetic powder therein is used. By this constitution, the ink is attracted by the electrodes and the meniscus 9 of the ink protruded from each electrode 8 in the opening part 1 is formed. Therefor, when high voltage is selectively applied to the electrodes 8, the meniscuses 9 protruded corresponding to electrostatic force generated between the electrodes 8 and a conductor 4 are easily injected to carry out recording with respect to recording paper 5.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in ink recording heads used in facsimiles, printers, etc. As recording methods for facsimiles, printers, etc.,
Conventionally, electrostatic recording methods, heat-sensitive recording methods, discharge breakdown recording methods, electrophotographic recording methods, etc. have been used, and the number of
O\, these methods all have drawbacks such as the use of special & E-sickle paper, high costs, complicated recording mechanisms, and unstable record retention status. is occurring.

For this reason, in order to solve these disadvantages, 14 interjet recording methods have been developed in recent years, and according to this, recording methods such as low noise, no noise, and stable record retention, etc. The benefits have been gained.

FIG. 1 is a perspective view showing a conventional example of a recording head and peripheral parts used in the interjet recording method, in which 1 is formed in a slit shape and has a good opening, 2 m, 2 b Fi opening 1 is formed. The upper plate and lower plate 3 are a large number of electrodes arranged periodically and parallel to the inner wall of the lower plate 2b, and together they constitute a recording head. Further, 4 is a conductor ff provided outside the opening 1 and facing the same, and ff is a ground potential conductor, 2 is a recording paper that moves along the conductor 4, and 6 is a high voltage applied to a selected one of the metal electrodes 8. 7 is an image signal.

It is assumed that the image signal T is applied to the drive circuit 6, and thereby the drive circuit S generates a high voltage.

Then inject the ink into the opening 1 and fill the opening 1.
When the ink is held in a meniscus shape and a high voltage is applied to any of the large electrodes 3, an electrostatic force is generated between any of the large electrodes 3 and the conductor 4. Due to this electrostatic force, the ink is ejected to the outside, and the ejected ink adheres to the recording paper 5, thereby performing recording.

However, if a far-far opening is provided for conductor 4, opening 1
While the conductor 4 can be placed between the 4b and the recording paper 5, the potential of the conductor 4 is not necessarily the 4b ground potential, but can be placed within a range where a sufficient electric field is created which is necessary for ejecting ink. −
If so, it can be set to any potential.

However, in the case of the configuration shown in FIG. 1, the inter meniscus is formed uniformly in the opening 1, so in order to eject only the ink from the selected part of the electrode 3, This requires a high voltage or a high voltage with a long application time, which complicates the configuration of the drive circuit and
The speed at which the recording paper 5 is moved cannot be kept low, resulting in drawbacks such as a decrease in recording efficiency.

The present invention has the purpose of fundamentally solving the drawbacks of the conventional art, and by providing the above-mentioned recording head with magnetically energized electrodes and ink having 'fii' properties, each tm To provide an extremely effective ink marking head in which a protruding ink meniscus is formed corresponding to the ink marking head.

Hereinafter, the present invention will be explained in detail with reference to the plan views from Figure 2 showing *Example.

In the second factor, the electrodes 8 arranged in the same manner as in FIG. 1 are made of a magnetized body that is hard magnetically energized and magnetically energized, and as the ink, A magnetic material containing magnetic powder or the like is used.

Therefore, ink is attracted by the electrodes 8, and a protruding ink meniscus 4s is formed for each electrode 8.
- Therefore, if a high voltage is selectively applied to the electrode 8, as in FIG. will be carried out.

That is, since the ink can be easily ejected, the high voltage applied to the electrode 8 can be reduced and the time width for applying the high voltage can be shortened.

j I3 diagram other implementation? Ii is a plan view showing the electrode 8.
The permanent magnet 11 is placed on the upper surface of the magnet 9 through the insulating plate 10, and the electrode a is magnetically biased. are doing.

Therefore, if magnetic ink is supplied from the thin tube 12, a protruding meniscus of ink corresponding to the electrode strength is formed, as in FIG. 2, and the above-mentioned result P can be obtained.

However, it is necessary to use an electromagnet instead of a permanent magnet.
The shape of the opening 1 and the shape of the electrode I can be selected arbitrarily as long as a meniscus of the ink is formed. The same effect can be achieved even if a different configuration is used, and the present invention can be modified in many ways.

According to the above explanation) @ Tooshi Rakana According to the present invention, a protruding meniscus of ink is formed corresponding to each electrode, making it easy to eject ink, and simplifying the configuration of the drive circuit. The present invention realizes improvements in recording performance, etc., and achieves remarkable effects as an ink recording head for various uses.

[Brief explanation of the drawing]

! Figure s1 is a perspective view of a conventional example, and Figures 2 and 3 are plan views showing an embodiment of the present invention. 1...Opening, 4...Conductor, L...Electrode,
9... Ink meniscus, 11... Permanent magnet. Patent applicant Masaki Yamakawa, agent of Nippon Telegraph and Telephone Public Corporation

Claims (1)

[Claims] Ink is held in a slit-shaped opening having a large number of electrodes on the inner wall, and a high voltage is applied to a selected electrode among the electrodes, and a conductor is placed outside the selected electrode and the opening. In the recording head, the ink is ejected out of the opening by an electrostatic force generated between the upper and lower apertures, and the ejected ink performs υ recording. That it was equipped with! ! !
Ink recording head named IvA.