JPS58193168A - Magnetic ink recorder - Google Patents

Abstract

PURPOSE:To provide a magnetic ink recorder which is capable of recording an image of high quality stably without blocking the supply and flying of a magnetic ink by forcibly running a non-condensed magnetic ink to clean the condensed magnetic ink. CONSTITUTION:When the subsequent recording is started after a pause of a certain time, a closed lid 44 is turned in the direction of the arrow to close an opening 45 and in linkage therewith, a rotary lever is turned of rotate a guide member 35 in the direction of the arrow A to form a passage from a slit section 14 to an ink recovery path 54. A pump 24 is driven by a pump driving means 25 so that a magnetic ink 20 jets rapidly from an opening slit 14 and a stream of ink is received and guided with a guide member 35 to an auxiliary magnet 16. A slant section 17 of a projecting magnet 12 and a stylus section 11 and the end face 18 of the auxiliary magnet following it are cleaned with a rapid flow of the magnetic ink stream.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention uses magnetic force to hold and raise magnetic ink on a recording needle made of a magnetic material, and applies a Coulomb force corresponding to an image signal to the raised magnetic ink. , relates to a magnetic ink recording device that records images by flying magnetic ink onto a recording surface, and prevents drying and concentration of the magnetic ink due to magnetic force by circulating the magnetic ink, even after being left for a long time or stopped. The purpose is to stably record images of good quality.

Conventionally, as shown in FIG. 1, a multi-needle recording unit 1 (hereinafter simply referred to as a stylus) in which recording needles made of magnetic material are arranged in a row, and a protruding magnet 5 provided on the stylus 1 are used. The stylus 1 is magnetized and the stylus 1 is magnetized by the magnetic force.
In the apparatus that forms an image on the recording paper 4 by forming a raised number of magnetic ink 2 on the top and applying an image signal voltage (applying Coulomb force) between the stylus 1 and the back electrode 3, the following steps are performed. It had the following drawbacks. That is, as shown in FIGS. 2 and 3, the magnetic ink 2 is always in contact with the bump magnet 5 and the auxiliary magnet 6 and is subjected to the magnetic force. Magnetic concentration (magnetic field segregation) 2' on top and auxiliary magnet 6
was occurring. For this reason, the flow of the magnetic ink 2 on the bump magnet 5 was inhibited, and stable supply could not be achieved as the magnetic ink 2 was consumed. Another disadvantage is that when the viscosity of the magnetic ink 2 increases due to evaporation, drying, and magnetic concentration of the magnetic ink 2, the magnetic ink 2 does not fly even if a Coulomb force is applied between the stylus 1 and the back electrode 3. It also had

Furthermore, in order to improve the drawbacks of the conventional example as described above, a method has already been proposed in which a lid member 7 that can be opened and closed is provided as shown in FIG. According to this method, since the pressure of the circulating magnetic ink 2 is directly applied to the lid member 7, the sealing mechanism of the lid member 7 needs to be complicated and strong. Furthermore, if ink mist, droplets, etc. adhere to the lid member 7, the lid member 7 cannot be opened.

The present invention is intended to eliminate the above-mentioned drawbacks, and is capable of stably producing high-quality images without hindering the supply and flight of magnetic ink when recording is performed when left unused or after recording has stopped for a required period of time. The present invention provides a magnetic ink recording device capable of recording.

An embodiment of the present invention will be described below with reference to FIGS. 6 to 10.

FIG. 6 is a schematic diagram of a magnetic ink recording apparatus according to an embodiment of the present invention. To record - Sodo section 10 is recording paper 15
A fixed housing 13 fixes a stylus 11 made of a magnetic material arranged to face the stylus 11, and a protruding magnet 12 provided in contact with the surface of the stylus 11.

An auxiliary magnet 16 forming a slit portion 14 is provided at a position facing the magneto-generating magnet 12 .

Further, a part of the magnet surface of the auxiliary magnet 16 except for the end face portion 18 is covered with a shield plate 19. Incidentally, the uplift magnet 12 and the auxiliary magnet 16 constitute a part of the storage chamber 21 for the magnetic ink 2o.

The magnetic ink supply pipe 22 is connected to the recording section 10.
One end thereof is connected to a magnetic ink storage chamber 21, and the other end is provided in a sub-tank 23 that stores the magnetic ink 20.

A pump 24 provided in the middle of the magnetic ink supply vibrator 22 is driven by a pump driving means 25 to supply the magnetic ink 20.
is supplied from the sub-tank 23 to the ink storage chamber 21.

Magnetic ink 2o is sent to the sub tank 23 from a main tank (not shown) through a pump 26 and a pipe 27. The liquid level of the sub-tank 23 is always maintained at a constant level by a detection means 28 such as a Hall element and a pump 26 driven in response to an i-plane position detection signal.

The stylus 11 is connected to a voltage applying means 29 that causes the magnetic ink 2o raised at the tip of the stylus to fly onto the recording paper 15 in response to an image signal. Further, a bias voltage is applied to the power source 3 between the stylus 11 and the back electrode 3o.
1 is applied. The guide member 35, which rotates around a fulcrum shaft 32 provided in the case body 39, is composed of a guide member body 33 and a packing member 34, as shown in FIG.

The guide member 36 is a rotating lever 3 that rotates around a fulcrum shaft 32 by links 36 and 37, as shown in FIG.
It is connected to 8. One end 38' of the rotating lever 38 engages with a recess 44' of the sealing lid 44, and as shown in FIG.
A sealing lid 4 that rotates around link 42 and 43 around point 1.
4 and rotates the guide member 36 in conjunction with the movement of the sealing lid 44. Airtight lid 4
4 includes a bar for sealing the opening 45 of the case body 39.
A sock 46 is provided on the outer periphery.

Further, when the guide member 36 is rotated in the direction of arrow A as shown in FIG. Ink guide grooves 48 are provided on the inner surface 47 of the ink guide.

The ink recovery path 54 is formed by a part of the case body 39, and is located on the side of the auxiliary magnet 16. Further, the end of the case body 39 on the side of the sealing lid 44 that forms the ink recovery path 64 protrudes forward from the slot/slot section 14 to form an ink receiver section 49 .

The airtight lid 44 has an arm 61 rotated by a motor 5o.
It is opened and closed by The twist screw 52 is the guide lid 35
This applies a negative force in the direction of arrow B.

Further, a filter 63 is provided in the middle of the ink recovery path 54.

Next, the operation of this device will be explained.

At the same time as the device power is switched on, the driving means 2
5 drives the pump 24 for a certain period of time, and the sub tank 2
3, the magnetic ink tank 20 is sent to the ink storage chamber 21 and filled. At this time, since the magnetic force of the protruding magnet 12 and the auxiliary magnet 16 is acting on the opening slit section 14 of the ink storage chamber 21, the magnetic ink 20 in the vibrator 22 is transferred from the opening to the ink liquid in the sub-tank 23. It is maintained without falling even when pressure equivalent to the drop to the surface is applied. The magnetic ink 2o is supplied to the tip of the stylus 11 through the sloped surface 17 of the bump-up magnet 12, forming a bump as shown in FIG.

When the voltage applying means 29 applies a voltage between the stylus 11 and the back electrode 30 in accordance with the image signal with the above-mentioned protuberance formed, the magnetic ink 2o is ejected from the tip of the stylus 11 by Coulomb force. As the magnetic ink 20 is consumed, the magnetic ink 20 is automatically supplied onto the stylus 11 through the pipe 22 as the magnetic ink 20 is consumed. If you do
Before starting recording, the motor 5o is driven and the arm 61 is moved to rotate the sealing lid 44 in the direction of arrow A, thereby sealing the opening 46 of the case body 39. At this time, the airtight lid 44
The rotation lever 38 rotates in conjunction with the movement of the guide member 3.
5 in the direction of arrow A to form a flow path from the pick-and-sort section 14 to the ink recovery path 54.

In the above state, the pump 24 is driven by the pump driving means 25, and the magnetic wick 20 is forcefully blown out from the opening slit 14. At this time, the guide member 35 is configured to receive the ejected ink flow and to guide the flow toward the auxiliary magnet 16. The stylus portion 11 and the auxiliary magnet end face 18 following the slope are cleaned by the rapidly flowing magnetic ink stream.

Therefore, the ink 20 that has dried or magnetically concentrated on the surfaces of the magnet 12 and the stylus 11 is washed away and is collected into the sub-tank 23 via the filter 53 of the ink collection path 64.

At this time, since the ink receiving portion 49 provided at the tip of the ink recovery path 64 formed as a part of the case body 39 is provided at a position protruding from the position of the opening slit portion 14 and the guide member 36, the guide member Since the airtight lid 44 is not exposed to droplets generated from the ink flow guided by the ink flow 35, the sealing lid 44 is not contaminated. In addition, the guide member 35 and the sealing lid 4
4, the magnetic ink 2o does not come into direct contact with the nozzles 46 of the airtight lid 44, which prevents the magnetic ink 2o from leaking outside the case body 39. 39 surface and ζ・Sokin 46
There is also no possibility that the ink 20 will stick between the holes and the sealing lid will not open.

Incidentally, since the magnetic ink 20 blown out from the opening slit portion 14 is attracted by the magnetic force of the auxiliary magnet 16, the magnetic ink flow is directed in the direction of arrow B by the magnetic force, and the shape of the guide member 35 and the guide member The ink is guided by an ink groove 4B provided on the inner surface 4 of 3S. Therefore, since the magnetic ink flow is collected into the ink recovery path 46 without being disturbed, the upper and side surfaces of the guide member 36 are not significantly contaminated, and the generation of ink mist can be reduced.

After driving the pump 24 for a certain period of time, the pump 24 is stopped, the sealing lid 44 is rotated in the direction of arrow B, the guide member 36 is also rotated, and the opening 46 of the case body 39 is rotated.
open. At this time, the bump magnet 12. Magnetic ink 2 that does not dry or magnetically concentrate is placed on the auxiliary magnet 16 and the stylus 11.
Since the ridges are formed by the supply of o, high-quality images can be stably recorded.

As described above, according to the present invention, when recording is stopped or left unused, concentrated magnetic ions generated in the vicinity of the recording needle and on each of the magnets due to the magnetic force of the bumping magnet and the auxiliary magnet, evaporation, drying, etc. are removed. The magnetic ink can be circulated as needed by providing a guide member for flushing and cleaning with a flow of unconcentrated magnetic ink, an ink collection path with an ink receiver, and a sealed lid that does not come into direct contact with the ink. It is possible to form ridges of magnetic ink that are always dry and free from magnetic concentration, and images of good quality can be stably recorded.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of the head section of a conventional magnetic ink recording device, FIG. 2 is a schematic diagram of the recording device, and FIG.
The figure is an enlarged view of the head section, FIG. 4 is a schematic diagram of another conventional example, and FIG. 6 is a plan view of the bed section of a magnetic ink recording apparatus according to an embodiment of the present invention. A schematic configuration diagram of the recording device, FIG. 7 shows the c-
c' sectional view, Figure 8 is the D- section of the same head part in Figure 5.
D' sectional view, FIG. 9 is a side view of the same, and FIG. 10 is a perspective view of the guide member of the device. 11...Multi stylus, 12...
Raising magnet, 20...Magnetic ink, 22...
... Ink supply path, 35 ... Ink guide member, 44 ... Sealing lid, 46 ... Sealing gasket, 54 ... Ink recovery path, 42 .43・
...Link, 5゜...Motor. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Meat Figure 3 Figure 4 Figure 5 Figure 6 Figure 9 Figure 7 Figure 0 4 Figure 8

Claims (1)

[Claims] A recording needle made of a magnetic material, a bump magnet provided on the recording needle, a magnetic ink supply path and a magnetic ink recovery path having openings arranged in parallel near the bump magnet, and a magnetic ink supply path and a magnetic ink recovery path provided in front of the recording needle. a sealing lid member that seals or opens a space from the ink supply path to the magnetic ink recovery path; and a lid member that covers a space in the space that includes at least the recording needle, the bump magnet, and the opening of the magnetic ink supply path. an ink guide member that is movably provided so that it can take a first position and a second position stored in the magnetic ink recovery path, and the ink guide member and the sealing lid member are moved; a magnetic ink recording device, characterized in that the ink guide member moved to the first position constitutes a flow path for magnetic ink from the magnetic ink supply path to the magnetic ink recovery path. .