JPS5875167A - Recording method - Google Patents

Abstract

PURPOSE:To obtain image of high quality with low electric power by providing recording electrodes of magnetic materials having plural picture elements which are in parallel with each other and are inclined with respect to the revolving shaft of a rotatable magnet roll on a nonmagnetic sleeve having said magnet roll in the inside and transferring a magnetic toner to a recording body. CONSTITUTION:Recording electrodes 3 of magnetic bodies having plural picture elements which are in parallel with each other and are inclined at 45 deg. with respect to the revolving shaft of a rotatable magnet roll 2 are provided on a nonmagnetic sleeve 5 having said magnetic roll in the inside. The roll 2 is rotated in a clockwise direction (shown by an arrow) and the sleeve 5 is rotated in the direction opposite from the roll 2, whereby the conveyed toner is fed to the electrode part under control with a regulating member 4 for the thickness of the toner layer. Electric charge is injected into the magnetic toner on a recording body 1 (having an insulating layer 1b on a conductive layer 1a) by synchronizing the timing for application of voltage upon the electrodes 3 with magnetic poles by a signal voltage generating means 6, whereby the toner is stuck on the body 1. Thus the recorded pictures of high grade are formed on plain paper with low electric power and less number of the electrodes 3 without need for any special power sources and driving elements.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a recording method for obtaining a visible image by selectively adhering magnetic toner to a placement medium.

The conventional arrangement method for forming 11g1 on the body using signal electric power is the conventional method. Examples of technologies that have been put into practical use include thermal imaging and transfer lid electrostatic imaging. Thermosensitive recording uses a thermal head with long elements arranged on recording paper that develops color when heated1. Transfer-type electrostatic recording uses long recording electrodes to write electrostatic potential onto an intermediate such as a dielectric material. There is one method of forming the image and developing and transferring it to obtain the record i1gI, the former is a direct type,
The latter type is called the transcription type. A common feature of these technologies is that one heating element or electrode corresponds to one element, so in order to increase mils and density and obtain high-quality fields, a long head with densely arranged elements is required. Another problem is that it requires advanced mounting technology to avoid the influence of nine elements that are close to each other, as well as electrodes, and is expensive.

Furthermore, in thermal recording, the applied voltage is low but the current is large, and in transfer electronic recording, a relatively high voltage is used, which requires a special power source and a considerable number of drive elements to drive each element. shall be.

In addition, in direct tII, specially treated paper must be used as the recording paper, but it is inferior to ordinary paper in many respects such as price, feel, writing ability, imprintability, odor, and storage stability. Currently there are f.

However, as a method of forming a record i+in corresponding to one-signal electric manual power, a technique called powder control, which forms an image by directly controlling powder, has also been proposed.

This technology has the advantage of being able to use plain paper for both direct and indirect methods, but like the above-mentioned recording method, it requires long electrodes with elements densely arranged, and the applied voltage is several hundreds. Requires a relatively high voltage of V.

A method using a magnetic electrode has also been proposed as a modification of powder contrastography. (Unexamined Japanese Patent Publication No. 50-41
827, Japanese Patent Application Laid-Open No. 50-8130, as shown in Figure 4, magnetic toner is used as powder, and an electrode 6 is placed in the arrangement part.
In this method, spikes of magnetic toner are formed on the top. Similar to the above-mentioned betting method, it is necessary to arrange the electrodes at a high density.

History: Due to the magnetic interaction between adjacent magnetic electrodes, spikes of magnetic toner are formed across multiple magnetic electrodes, which is inevitable! It is clear from the examination of this actual development that the peripheral part of IIIX is also printed.
became.

In view of the drawbacks of the prior art, the present invention reduces the packing density of electrode elements compared to the prior art, and
There is one method that provides a recording method in which the signal electrical input required for recording is a low voltage and /J% current.

The present invention also provides a recording method that allows recording on plain paper or the like.

An object of the present invention is to provide a magnetic recording electrode having a plurality of pixels parallel to each other and inclined with respect to the (b) rotation axis of the magnet roll on a non-magnetic sleeve having a rotatable magnet roll therein. A magnetic brush of magnetic toner is formed on the recording electrode, which is placed apart from the recording body, and this magnetic brush is brought into contact with the recording body by the magnetic field effect VC of the monument roll, and a signal is sent to the recording electrode having a part to be recorded. This is achieved by a recording method characterized by applying a voltage to transfer magnetic toner to a recording medium to form an image.

The present invention will be explained below with reference to the drawings.

FIG. 1 is a schematic explanatory diagram of the recording method according to the present invention.

Reference numeral 1 denotes a recording body, which consists of a conductive layer 1 and an insulating layer 1b. In the following explanation, indirect manufacturing will be described for convenience, but direct manufacturing will be described.
iI! When used as 11, there is no insulating layer 1b, and instead the paper is placed directly on the counter electrode (1) [The recording principle is the same.

2 is a magnet roll, which rotates clockwise in the figure. A magnet roll with an expanded symmetrical magnetic field pattern, 16 poles per pole, and one magnetization width is used, but it is not necessarily limited to this. Reference numeral 6 denotes a recording electrode 1 made of a magnetic material having high magnetic permeability and low coercive force, which has an elongated shape as shown in FIG. 2, and is arranged at an angle with respect to the axial direction of the magnet roll. The recording electrodes are insulated from each other, and connected to lR6 during signal voltage generation so that a signal voltage can be applied to each recording electrode.

By the rotation of the magnet roll 2, the magnetic toner is conveyed counterclockwise on the fixedly installed magnet roll sleeve 5, and after being adjusted to the tip of the toner layer thickness regulating member 414, it is sent to the recording electrode section.

When the recording electrode is magnetized by the magnetic field of the magnet roll, when a voltage is applied to the recording electrode, charge is injected from the electrode into the toner spikes and reaches the tip ISK along the spikes.

When the electrostatic attraction between the toner at the leading end and the recording medium exceeds the magnetic iJi force acting on the toner, the toner adheres to the recording medium and printing is performed. If no spikes are formed on the electrode, or if the spikes are not aligned with the recording material and the toner and the recording material are not in contact, the electrostatic attraction between the toner and the recording material is weak and the toner is restrained by magnetic attraction. This prevents toner from adhering to the recording medium.

Therefore, printing is possible under the following two conditions: (1) A magnetic pole exists directly below the recording electrode, and a toner spike that is different from the recording medium is formed from the electrode; (2) An appropriate voltage is applied to the recording electrode. ; is performed when both are satisfied at the same time.

In the recording method 1 according to the present invention, the recording electrode is arranged at an angle with respect to the axial direction of the magnet roll.1, As the magnet roll rotates, the position of the toner spikes on the recording electrode moves as shown in Figure W113. do. Therefore, when there is a spike in a desired area for printing, printing can be performed at any position by applying a pulse-like voltage KA.

In other words, by synchronizing the voltage application timing with the magnetic pole moving the electrode part, dividing the period from when the magnetic pole enters the electrode part to the time it leaves the electrode part into an arbitrary number of pixels, and applying a /# spiral signal voltage to each pixel. By providing the same number of recording electrodes corresponding to 9 and applying a paddle-shaped voltage to each of them, it is possible to obtain the same effect as in the case of 9. As a result, it is possible to significantly reduce the number of recording electrodes and the packaging density. Similarly, the number of driving elements is greatly reduced, and the signal electrical input is advantageous in that it requires only a low voltage and a small current, which is an effect obtained by using a magnetic electrode as the electrode.

Furthermore, in the conventional contrast graph camera having a magnetic electrode for each pixel, the electrode is -r f 4 '/ ) Ct
- Since the electrodes were arranged linearly in the axial direction, the electrodes on the blade were magnetized at the same time, forming spikes of toner on the electrodes.
When forming a spike that spans adjacent electrodes K, the signal current leaks across these multiple electrodes K, causing the area around the pixel that is to be printed to be printed as well, resulting in the resulting pixel being However, according to the recording method according to the present invention, the distance between tl and the electrode is sufficiently large (114M), and no ridge spanning between adjacent electrodes is formed, and the distance between the tl and the electrode is not large enough. Since only the part of the circle where the magnetic pole is directly below is printed, the printed pixels are very sharp. This @VCI, a friend record -
The image can be obtained on plain paper by transferring and fixing it in the same way as the conventional xerography method.

Here, the size and shape of the pixel to be printed are determined, and if the magnetization width is narrow, the pixel becomes sharp and small.

Also, if the angle between the electrode and the magnet roll axis E is small, the pixel will be #1IIl long in the axial direction, and if it is large, the pixel will be elongated in the circumferential direction, resulting in a pixel close to a circle l with a well-coordinated angle of 45°11°. I can do things.

In the apparatus shown in Example No. 1-, my 2
- Width 100 Is on an insulating non-magnetic sleeve after coating;
The length is 2.5M, the height is 500#, made by Hitachi Metals, high permeability soft magnetic material, product name Tough Arm 81, and the magnetic roll axis and the recording electrodes arranged at an angle of 45° are used. 600f, recording body ft20”/B-?Imk
When an electrical input of L, +50V, 4SsBO signal was applied, a clear image of 8 dots/■ was obtained. At this time, the toner had a magnetic powder content of 80 parts by weight and a resistivity of 104 Ω, and the recording medium was an aluminum drum 1 coated with 12# thick mylar. Furthermore, the polarity of the electrical signal input could be either positive or negative, and even at -5OV, an image of all <p11 was obtained.

As described above, the recording method according to the present invention does not require long electrodes with elements mounted at high density and advanced mounting technology, which were required by conventional recording methods, and can significantly reduce the cost of electrodes. In addition to this method, there are other methods that have many advantages such as low voltage and low current signal input, no special power source or drive element required, and high quality recorded images can be obtained on universal paper.

Furthermore, it has the feature that an inverted image can be obtained more easily than K by applying a voltage of the same potential and the same polarity as the signal electrical input to the conductive layer of the recording medium as shown in Fig. 1. be.

[Brief explanation of the drawing]

The first IQ is shown in Figure 1, which is a schematic illustration of the configuration of the recording device O according to the present implementation, Figure 2 is a view of the electrode section of the recording device viewed from above, and Figure 3 (a) and (b). and (C) are diagrams showing the relationship between the movement of the magnetic pole and the shape of the spike in the first method according to the present invention, and FIG. 4 is a diagram showing l! -〇IQe&ru indicating the recording device OW seagull. Code in the figure: 10.・Ki LL body 2... Magnet roll,
G... Recording electrode, 4... Toner layer thickness regulating member, 5
-! /Net roll lease 6-signal voltage generation 4 stages, 7...-#@L. Figure 3 Figure 1114

Claims (1)

[Claims] A magnetic recording electrode having a plurality of markings parallel to each other and inclined with respect to the rotation axis of the magnet roll is provided on a non-magnetic sleeve having a rotatable magnet roll therein, and this recording electrode is placed apart from the recording medium. Then, a magnetic brush of a magnetic brush is formed on the recording electrode, and the magnetic brush is brought into contact with the recording medium by the action of the magnetic field of the magnet roll, and a signal voltage is applied to the recording electrode having the pixel portion to be recorded. , a recording method characterized in that time is formed by transferring magnetic toner to a recording medium.