JPS6011371A - Recording apparatus - Google Patents

Abstract

PURPOSE:To obtain a recording image having good resolving power, by protruding a recording electrode toward a recording electrode support so as not to generate trouble in the supply of toner to said electrode to allow a toner chain to have height difference. CONSTITUTION:When a magnet roll 12 is rotated by a magnet driving apparatus, a magnetic field also rotates to draw out the toner 14 in a hopper 13 onto the outer peripheral surface of a sleeve 11 through a doctor gap 16 and the toner 14 is fed to a direction opposite to the rotary direction of the magnet roll 12 on the outer peripheral surface of said sleeve 11 and reaches in the vicinity of recording electrodes 19 through the first surface 18a of an recording electrode support 18. By this mechanism, a toner chain 25 is formed on the edge part 19b of the recording electrodes 19 while a toner chain 26 is formed on the second surface 18b of the electrode support 18 between recording electrodes 19.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention supplies a recording medium between a recording electrode and a back electrode that are opposed to each other, and also holds toner containing a magnetic substance on the recording electrode by magnetic force. In this state, a voltage is applied between a recording electrode and a back electrode, and the toner is transferred to a recording medium against the magnetic force by this insect-repelling roller to perform recording.

Structure of Conventional Example and Its Problems FIG. 1 is a sectional view of a conventional recording apparatus of this type. In this figure, 1 is a sleeve, 2 is a magnet roll formed by assembling a plurality of magnets into a roll, 3 is a hopper, and 4 is a toner. Reference numeral 5 denotes a recording head, which consists of a recording electrode support 6 provided on the sleeve 1 and a recording electrode 7 buried in the recording electrode support 6 and having an appropriate size. In addition, Jinko
The tip surface 7 of the recording electrode 7! L is located on the same plane as the lower end surface of the recording electrode support 6. Further, FIG. 2 shows a bottom view of the recording head 6, and as seen in this figure, the recording electrodes r are arranged in large numbers in a line along a direction parallel to the axis of the sleeve 1. .

8 is a back electrode, 9 is a recording medium such as plain paper or electrostatic recording paper,
Reference numeral 10 denotes a voltage voltage application circuit that selectively applies a voltage between each recording electrode 7 and the back electrode 8.

In this device, by rotating the magnet roll 2 in the direction of the arrow, toner 4 is drawn out from the cylinder 3 onto the outer circumferential surface of the sleeve 1 (11). , and is conveyed along the outer circumferential surface in the direction of arrow B, reaching the tip surface 7a of the recording electrode 7. In such a state, when a voltage pulse is selectively applied between each recording electrode element and the back electrode 8 by the voltage pulse application circuit 10, the voltage pulse is applied on the recording electrode Y to which the voltage pulse is applied. The toner particles at the tip of the toner chain (toner particles connected in a chain along the lines of magnetic force emitted from the magnet roll 2) are
It moves to the recording medium 9 against the magnetic force of the magnet roll 2, and is deposited on the recording medium 9 in the form of dots, thereby performing recording.

Note that the toner particles that have reached the tip surface 7A of the recording electrode 7 but have not migrated onto the recording medium 9 pass through the tip surface 7a of the recording electrode 7 due to the rotation of the magnet roll 2 in the direction indicated by the arrow. The toner 4 is further conveyed along the outer circumferential surface of the sleeve 1 in the direction of arrow B, returns to the opposing portion of the hopper 3 and the sleeve 1, and joins with the toner 4 newly supplied to the sleeve 1 from the hopper 3.

However, in such a conventional device, as shown in FIG.
As shown in FIG. 1), the toner particles are uniformly distributed between the recording head 5 and the recording medium 9.
Adjacent recording electrodes 7 influence each other,
This had the disadvantage of lowering the resolution of recorded images.

That is, when a voltage of -2 is applied to a certain recording electrode 7(n) in order to make it perform recording, the adjacent electrodes 7(n-1) and γ(n-1-1) If it is grounded, a part of the charge that should normally be charged only to the toner chain of the recording electrode 7 (n) J: is transferred to the adjacent electrode 7 (n-
1), 1 leakage occurs in 7(n+i), and the electrode (
, n) is insufficient to be transferred to the top chain, and the magnetic force of the toner particles moving from the same toner chain to the recording medium 9 decreases the amount of charge that can be transferred to the top chain.
−1), 7(n +1) is charged to the toner chain =7, and a voltage force is applied to the electrode 7(n).
As a result, the toner particles migrate to the recording medium 9, resulting in a decrease in the resolution of the recorded image.

In the conventional device as well, if the recording electrodes 7 are made of a magnetic material, the distribution of magnetic lines of force will be dense in the recording electrodes 70, but the distribution of magnetic lines of force will be coarse between the recording electrodes 7. As shown in FIG. 4, the distribution of toner particles is dense at the recording electrodes 7 and coarse between the recording electrodes 7, so that the leakage of Ai+ recording charges is somewhat reduced and the resolution of the recorded image is improved. ○ However, even if such measures are taken, a considerable amount of toner particles still exist between the recording electrodes 7, so the resolution of the recorded image is affected by the influence of the adjacent recording electrodes. It was not possible to sufficiently prevent the deterioration of the product.

OBJECTS OF THE INVENTION The present invention has been made in order to eliminate the above-mentioned drawbacks of the conventional art, and provides a recording device that can almost eliminate the influence of adjacent recording electrodes on each other and obtain recorded images with good resolution. The purpose is to

Configuration of the Invention A recording device according to the present invention includes a recording electrode support having a first surface and a second surface adjacent to each other at a certain angle, and a tip surface substantially continuous with the first surface. , a plurality of recording electrodes each provided on the recording electrode body with at least the distal end surface and a portion thereof protruding from the second surface, and a recording medium is connected to the recording electrode. By arranging the edges of the distal end surfaces of the recording electrodes to face each other, the distance between the recording electrode and the recording medium is made shorter than the distance between the recording electrode support and the recording medium between the recording electrodes, and the recording electrode The above object is achieved by creating a difference in the height of the toner chain formed between the recording electrodes and the height of the toner chain formed between the recording electrodes. will be described in more detail based on embodiments shown in the drawings.

FIG. 5 is a sectional view of a recording device according to an embodiment of the present invention. Reference numeral 11 denotes a sleeve, and this sleeve 11 is made of an electrically conductive non-magnetic material such as aluminum alloy, or an electrically insulating non-magnetic material such as textile or synthetic resin. This sleeve 1
1, a magnet roll 12 made up of a plurality of magnets assembled in a roll shape is housed coaxially and rotatably with the sleeve 11, and the outer peripheral surface of this magnet roll 12 has an S pole and an N pole. are formed alternately. Further, the magnet roll 12 is rotated in the direction of arrow C by a magnet 5 driving device (not shown).

A hopper 13 is provided near the top of the sleeve 11, and a toner 14 containing a magnetic material is stored in the hopper 13.

A doctor 15 is formed at the bottom opening of the hopper 13, and the tip of the doctor 16 faces the outer peripheral surface of the sleeve 11 with a doctor gap 16 in between.

A recording head 17 is attached to the sleeve 11, and this recording head 17 includes a recording electrode support 18,
It is composed of a recording electrode 19, an insulating coating 20, and the like. Note that FIG. 6 is a plan view of this recording head 17;
FIG. 7 is a perspective view of the recording head 17.

Here, the recording electrode support 18 is made of an electrically insulating non-magnetic material and is fixed to the sleeve 11. Also,
The recording electrode support 18 has a first surface 18a and a second surface 18b adjacent to and perpendicular to the first surface 18a.

The recording electrode 19 is attached to the sleeve 1 on the second surface 18b.
A large number of them are arranged along a direction parallel to the axial direction of the first axis. The tip surface 19+& of each recording electrode 19 is continuous with the first surface 1sa of the recording electrode support 18, but the tip surface 19a of each recording electrode 19 and its vicinity are connected to the recording electrode support 18. It protrudes from the second surface 18b of the body 18. In fact, the recording electrode 19 is covered with a completely R coating 2o except for the vicinity of the tip surface 19a.

The edge portion 19b of the tip surface 19a faces the back electrode 21 with a gap interposed therebetween. Reference numeral 22 denotes a recording medium such as plain paper or electrostatic recording paper, which is passed between the recording electrode 19 and the back electrode 21 so as to face the edge portion 19b of the recording electrode by a recording medium supply means such as a paper feed roller (not shown). while being conveyed in the direction of arrow E. Reference numeral 23 denotes a voltage pulse application circuit that selectively applies voltage pulses between each recording electrode 19 and the back electrode 21 in accordance with an image signal or the like.

Next, the operation of this embodiment will be explained.

The magnetic roll 12 is rotated by the magnet drive device 7, and the magnetic field by the roll 12 also rotates 1-1. Due to this rotating magnetic field, the toner 14 in the hopper 13 is pulled onto the outer peripheral surface of the sleeve 11 through the doctor gap 16. The recording material is then conveyed on the same outer peripheral surface in a direction opposite to the rotational direction of the magnet roll 120 (in the direction indicated by the arrow), further passes through the first surface 18a of the recording electrode support 18, and reaches the vicinity of the recording electrode 19.

As a result, as shown in FIGS. 8 and 9, a toner chain 25 is formed on the edge portion 19b of the recording electrode, and the electrode support 1 between the recording electrodes 19 is formed.
A toner chain 26 is formed on the second surface 18b of the recording electrode 19 in this embodiment.
8 a (constitutes a part of the means for supplying the toner 14 from the Ill, and at the same time functions as a magnet for holding the toner 14 on the recording electrode 19).

In such a state, when a voltage pulse is selectively applied between each recording electrode 19 and the back electrode 21 from the voltage pulse application circuit 23 in response to an image signal, etc., the edge of the selected recording electrode 19 is The particles at the tip of the toner chain 26 on the portion 19b move onto the recording medium 22 against the magnetic force of the magnet roll 12 due to Coulomb force. As a result, the dot corresponding to the selected recording electrode 19 is placed on the recording medium 2.
2” is printed on the second page. Therefore, when the recording medium 22 is transported in parallel with the application of the voltage noculus,
An image corresponding to the image signal etc. is recorded on the recording medium 22.

Here, in this apparatus, as shown in FIGS. 8 and 9, the distance between the edge portion 19b of the recording electrode 19 and the surface of the recording medium 220 is longer than that of the recording electrode support 18.
The distance 4 between the second surface 18b and the surface of the recording medium 220
Since it is more smoky, the toner chain 2 on the edge portion 19
6 and the height of the toner chain 26 between the recording electrodes 19, leakage of charge between adjacent recording electrodes 19 is less likely to occur than in the past. Further, the toner chain 26 on the edge portion 19b easily contacts the recording medium 22, but the toner chain 26 between the recording electrodes 19 hardly contacts the recording medium 22. Therefore, when a voltage pulse is applied to the recording electrodes 19 as described above, the toner chain 2 between the recording electrodes 19
Almost no toner particles of No. 6 transfer to the recording medium 22.

Therefore, the resolution of recorded images is improved.

Also, suppose that the recording electrode 19 is not only attached to the second surface 18b of the recording electrode support 18, but also to the first surface 18? Assuming that the toner 14 also protrudes from the recording electrode 1
However, in this recording device, since the first surface 18a and the tip surface 19a of the recording electrode 19 are continuous, such a problem can be avoided. It never happens.

Although it reached the recording electrode 19 as described above,
The toner particles that have not migrated to the recording medium 22 are returned to the doctor gap 16 through the recording head 1A, the upper surface of the recording electrode support 18, and the -J portion of the sleeve 11 due to the rotating magnetic field, and are returned to the doctor gap 16 from the hopper 13. It merges with the newly supplied toner 14.

FIG. 10 shows another embodiment of the invention. 27 is a hopper, and in this embodiment, one wall of this hopper 27 constitutes a recording electrode support 27a. The recording electrode support 27a has a first surface 27b and a second surface 270 adjacent to and perpendicular to the first surface 27b.

On the second surface 270, a large number of recording electrodes 28 are arranged side by side. As in the case of the embodiment, the tip surface 28a of the recording electrode 28 is continuous with the first surface 27b of the recording electrode support 27a, but the tip surface 28a of the recording electrode 28 is And the portion near it protrudes from the second surface 27b of the recording electrode support 27&. Further, the recording electrode 28 has a distal end surface 2
It is covered with an insulating coating 29 except for the vicinity of 8a. -1, a magnet 30 is fixed to the recording electrode 28 via an insulating coating 29.

The edge portion 2Bb of the tip surface 2sa of the recording electrode 28 is
It faces the back electrode 31 with a gap in between.

Reference numeral 32 denotes a recording medium such as plain paper or electrostatic recording paper, which is passed between the recording electrode 28 and the back electrode 31 so as to face the edge portion 28b of the recording electrode 28 by a recording medium supply means such as a paper feed roller (not shown). While being conveyed in the direction of arrow F. 33 indicates each recording electrode 2 according to the image signal, etc.
This is a voltage pulse application circuit that selectively applies voltage pulses between the back electrode 31 and the back electrode 31.

Next, the operation of this embodiment will be explained.

In this embodiment, toner 34 containing a magnetic substance is supplied from the hopper 27 to the tip surface 2sa of the recording electrode 28 by the movement of the storage medium 32, and is held on the electrode 28-L by the magnetic force of the magnet 30. .

Then, when a voltage pulse is applied from the voltage pulse application circuit 33 between the recording electrode 28 and the back electrode 31, the toner particles move to the recording medium 32 against the magnetic force, as in the case of the above embodiment. and recording is performed.

As described above, in this embodiment, the method of supplying toner 34 to the recording electrode 28 is different from that in the previous embodiment, but the relationship of the recording electrode 28 to the recording electrode support 27a is different from that in the recording electrode support in the previous embodiment. The relationship between the recording electrode 19 and the body 18 is the same, and the toner 34 is applied to the recording electrode 2 from the first surface 27b side as in the previous embodiment.
8, the resolution of the recorded image is improved in this embodiment as well, in exactly the same way as in the previous embodiment.

Note that in each of the above Examples, the angle formed by the first surface and the second surface of the recording electrode support is a right angle, but in the present invention, the angle does not necessarily have to be a right angle. , you can choose a suitable angle.

In the present invention, the recording electrode may be made of a non-magnetic material or a magnetic material, but if it is made of a magnetic material, the magnetic field lines on the recording electrode will be reduced as described above. Since the density can be increased, the toner chains on each recording electrode can be separated more clearly, and the resolution of the recorded image can be further improved.

Effects of the Invention As described above, according to the present invention, the recording electrode is made to protrude from the recording electrode support in a manner that does not hinder the supply of toner to the electrode, and the toner chain formed on the recording electrode is By creating a difference in height and the height of the toner chain formed between the recording electrodes, there is an excellent effect of almost eliminating the influence of adjacent recording electrodes and making it possible to obtain recorded images with good resolution. You can get .

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing a conventional storage device, FIG. 2 is a bottom view of the recording head in the conventional device, FIG. 3 is a cross-sectional view showing the distribution state of toner particles in the recording head section of the conventional device, and FIG. FIG. 4 is a cross-sectional view showing the distribution of toner particles in the recording head section when the conventional apparatus is configured with a self-recording magnetic material using glue, and FIG. 6 is a cross-sectional view of a recording apparatus according to an embodiment of the present invention. 6 is a bottom view of the recording head in the recording apparatus according to the embodiment, FIG. 7 is a perspective view of the recording head, FIG. 8 is a sectional view showing the distribution of toner particles in the recording head section, and FIG. 9 8 is a sectional view taken along line IX-IX in FIG. 8, and FIG. 10 is a sectional view of a recording apparatus according to another embodiment of the present invention. 11... Sleeve, 12... Magnet roll,
13...Hopper, 14...Toner, 1
7... Recording head, 18... Recording electrode support,
18a...first surface, 18b...second surface, 19
... Recording electrode, 19a ... Tip surface, 19b
・Edge part, 21... Back electrode, 22...
Recording medium, 23... Voltage pulse application circuit, 27...
Hopper 127 & Recording electrode support, 27b
...First side, 27C...Second side, 28
...Recording electrode, 28a...Tip surface, 28b...
- Edge portion, 30... - magnet, 31... back electrode, 32... recording medium, 33... voltage pulse application circuit. Name of agent Patent attorney Satoshi Nakao Machi and 1 other person Figure 1 1 Kyu 3 Figure 'I (n-1) 7n 7do7+'' Figure 4 Figure 5 Figure 3 Kimi 6 Figure 7 Figure 7 1γノ'/ b Fig. 8 9 [m ” Fig. 20

Claims (1)

[Scope of Claims] A recording electrode support having a first surface and a second surface that are adjacent to each other at an angle, and a tip surface that is substantially continuous with the first surface; a plurality of recording electrodes each provided on the recording electrode support in such a manner that the tip surface and a portion thereof protrudes from the second surface; a back electrode facing the recording electrode; a flat part for supplying a recording medium between the recording electrode and the back electrode; a means for applying a voltage between the recording electrode and the back electrode; and a flat part for applying a voltage between the recording electrode and the back electrode; A recording device comprising: means for supplying the toner to the recording electrode; and a magnet for holding the toner on the recording electrode by magnetic force, and the recording medium is opposed to an edge portion of a tip surface of the recording electrode.