JP2003246190A - Recording method using honeycomb magnetic display panel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recording method which uses a honeycomb magnetic display panel capable of forming a clear record symbol by surface-erasing and a multipolar magnet as a magnet for writing. <P>SOLUTION: The recording method using a honeycomb type magnetic display panel uses the honeycomb type magnetic display panel 1 comprising two base plates 1a and 1b constituting a multi-cell structure 4, the cells 41 of which are filled with a dispersion liquid containing at least magnetic particles, non- magnetic particles and a dispersion medium, and a surface-erasing magnet I having a clearance 3 and a multipolar magnet for writing 2. By using the panel 1 and the magnet I, the recording surface of the display panel 1 is recorded or erased. The back side of the honeycomb type magnetic display panel has a ferromagnetic material. The clearance of the surface-erasing magnet is formed by a porous material. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording method using a honeycomb type magnetic display plate, and more specifically, a honeycomb which can be clearly recorded on a recording surface and can be uniformly erased from the recording display surface side. The present invention relates to a recording method using a magnetic display plate.

[0002]

2. Description of the Related Art Conventionally, a honeycomb type magnetic display plate is known. This honeycomb type magnetic display plate has a multi-cell structure such as a honeycomb structure between two substrates, for example, in Japanese Patent Publication No. 59-47676 and Japanese Patent Publication No. 62-53359, and black cells are formed in these cells. It is manufactured by enclosing a dispersion liquid containing magnetic particles, non-magnetic particles such as white pigments and a dispersion medium, and normally, the recording and displaying surface is recorded using a magnet such as a magnetic pen and used as a display body, Also, when trying to display another display object at the same place (where it is recorded),
Once the display body on the recording display surface is erased, this erasing means applies an erasing magnet to the back surface of the honeycomb type magnetic display plate to slide it and erase it, and the display surface is made a uniform white surface. There is disclosed a honeycomb-type magnetic display plate capable of performing no recording, then recording, and repeating recording and erasing as needed, and a recording method using the same.

[0003]

However, in the above-mentioned honeycomb type magnetic display plate, normally, after the recording, when the recording medium is erased, an erasing magnet is applied to the back surface side of the recording display surface. Recording is erased by sliding or moving. Therefore, in order to use such a honeycomb type magnetic display plate, it is necessary to install means for mechanically moving the erasing device instead of manually. Therefore, there was an inconvenience and economical disadvantage, and improvement was required. Also,
When this honeycomb type magnetic display board is used as a blackboard for business use, not only a large-scale erasing device is required, but especially when it is installed on a wall surface (built into a wall),
There was a problem that it was expensive and economically disadvantageous. In view of this point, instead of erasing the recording display body from the back side, an erasing attempt was made from the recording display surface side using an erasing magnet (hereinafter, also referred to as top erasing), but the erasing result was black on the recording surface. The magnetic particles were attracted uniformly, and the surface became dark, so that writing on the surface did not allow writing, and recording was not possible.

Therefore, the present inventors have made various studies on the above problems, and have improved the erasing magnet by providing a clearance for the erasing magnet, and slide the recording and display surface using the erasing magnet. However, the degree of erasure differs depending on the type of honeycomb type magnetic display plate. That is,
Magnetic particles having large magnetic particles, for example, particles having a particle size of 10 to 150 μm disclosed in JP-A-8-7532 have 90% by weight or more, and magnetic particles having an apparent density and a saturation magnetization are specified. Using a honeycomb-type magnetic display plate containing a erasing magnet with the above clearance, when sliding on the surface having written characters, not only the characters are not sufficiently erased, but the surface is darkened as a whole. I was there.
Therefore, even if a multi-pole magnet pen was used to write on this surface, the written characters were extremely unclear and recording was not possible. On the other hand, for example, by using a honeycomb-type magnetic display plate disclosed in Japanese Patent Publication No. 59-47676,
When the erasing magnet having the above clearance was slid on the surface having the written characters, a uniform erasing surface was obtained although the surface was not pure white but was slightly grayish white. Furthermore, when characters were written on this recording and display surface with a multi-pole magnetic pen, clear characters were obtained even when the space between the lines was narrow, and clear characters with continuous lines were drawn. The present invention has been made based on this finding. Therefore, a first problem to be solved by the present invention is to provide a recording method using a honeycomb-type magnetic display plate capable of forming a clear recording display body by erasing on the top. A second problem to be solved by the present invention is a recording method using a honeycomb-type magnetic display plate capable of forming a clear recording display body by using a multi-pole magnet as a writing magnet on a display surface that has been erased. To provide.

[0005]

Each of the above-mentioned objects of the present invention can be achieved by each of the following inventions.

(1) A honeycomb type magnetic display plate having a multi-cell structure between two substrates, and a dispersion liquid containing at least magnetic particles, non-magnetic particles and a dispersion medium enclosed in these cells, and a multipolar writing magnet. A recording method using a honeycomb-type magnetic display plate, characterized by combining with an upper erasing magnet having a clearance, and using these to record on the recording display surface of the display plate or erase from the recording display surface side. . (2) The recording method using the honeycomb type magnetic display plate as described in the above item 1, wherein a ferromagnetic material is provided on the back surface of the honeycomb type magnetic display plate. (3) The recording method using the honeycomb type magnetic display plate described in the above item 1 or 2, wherein the clearance of the upper eraser magnet is a porous body.

The recording method using the honeycomb type magnetic display plate of the present invention has a multi-cell structure between two substrates, and a dispersion liquid containing at least magnetic particles, non-magnetic particles and a dispersion medium is enclosed in these cells. A combination of a honeycomb type magnetic display plate, a writing multi-pole magnet and an upper erasing magnet, and by using these, recording on the recording display surface of the display plate or erasing from the recording display surface side, that is, the above configuration A honeycomb-type magnetic display plate made of a magnetic recording medium is slid by applying an upper erasing magnet to the recording and displaying surface to obtain a uniform erasing surface, and then recording on the surface with a writing magnet to obtain a clear recording display body. Can be formed. Further, according to the second aspect of the present invention, by providing a ferromagnetic material on the back surface of the honeycomb magnetic display plate, not only a clearer recording display body can be obtained, but also a large honeycomb magnetic display plate is provided. When manufactured, it serves as a shape-retaining and reinforcing member for the honeycomb-type magnetic display plate. That is, it is possible to obtain a large-sized honeycomb type magnetic display plate in which the required shape is maintained by the reinforcement and there is no unnecessary bending or distortion.

In the third aspect of the present invention, the erasing operation is performed on the display surface of the honeycomb type magnetic display plate according to the first or second aspect with an erasing magnet having a clearance, that is, an upper erasing magnet. And, it has an excellent effect that a uniform grayish-white (slightly gray) display surface is obtained, and particularly, when the clearance is a non-magnetic porous body, it has an even better effect. is there.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of the present invention will be described. When "upper erase" is described in the present specification, an erasing magnet is provided on the display surface of a honeycomb type magnetic display plate. It means to move or slide by applying, and when it is referred to as an upper erasing magnet or an upper erasing erasing magnet, the erasing magnet is applied to the recording surface side via a clearance and slid and recorded on the recording display surface. It means an erasing magnet for erasing characters and pictures.

As the honeycomb type magnetic display plate used in the present invention, a conventionally known one can be used, for example, a structure having a multi-cell structure between two substrates, in which at least magnetic particles and non-magnetic particles are contained. And a honeycomb type magnetic display plate in which a dispersion liquid containing a dispersion medium is enclosed. However, the present invention is not limited to this. As a multi-cell structure, for example, a honeycomb structure is generally used, but it is not limited to this. The substrate may be any known one, but is preferably a plastic plate, sheet, film or the like. Further, hard materials are preferred. As the dispersion solvent, water, polar solvents such as glycols, non-polar organic solvents, petroleum and the like are widely used. In the present invention, examples of the magnetic particles used in the honeycomb type magnetic display plate include commonly known black magnetite, ferrite and black ferrite. In particular, the magnetic particles used in the honeycomb-type magnetic display plate of the present invention are preferably not too large, and magnetic particles having a particle size of 50 μm or less, particularly 2 to 50 μm are preferably used. More preferably, the particle size of the magnetic particles is 2 to
The particle size is 44 μm, the particle size is 2 to 30 μm, and more preferable results are obtained when the particle size of the magnetic particles is 2 to 10 μm. Examples of the non-magnetic particles include pigments, preferably white pigments and dyes.

In the honeycomb type magnetic display plate used in the present invention, the above-mentioned magnetic particles, non-magnetic particles, etc. are dispersed in a dispersion solvent and enclosed in a honeycomb container. A particulate thickener can also be added to maintain. Preferable fine particle thickeners include finely divided silicic acid, finely divided silicate, finely divided alumina and the like. Here, when finely divided alumina having a hiding power is added as the fine particle thickener, the pigment may not be added or the amount thereof may be adjusted.

The honeycomb type magnetic display plate used in the present invention can be used in the recording method using the present invention as it is, but it is preferable to provide a ferromagnetic material on the back surface of the honeycomb type magnetic display plate. By the recording method using the honeycomb type magnetic display plate of the present invention, a clearer recording display body can be obtained, and particularly when it is used as a large honeycomb type magnetic display plate such as a blackboard, the honeycomb type magnetic display plate is reinforced. It is also excellent in that it can also serve as the above, that is, by providing an iron plate on the back surface of the honeycomb type magnetic display plate to reinforce it, it is possible to eliminate bending and distortion.

The upper eraser magnet used in the present invention is not limited to the type and material of the magnet, but has a clearance in the magnet. The upper eraser magnet used in the present invention will be described in more detail. As the eraser magnet, it is preferable to use a magnet having a characteristic value of surface magnetic flux density of 100 to 750 gauss. Since such a magnet varies depending on the use of the display sheet, it is widely used according to the use and is not particularly limited, but may have any shape such as a columnar shape, a coin shape, a rod shape, or a prismatic shape, and has a size. It can be appropriately selected. Among them, as the erasing magnet used for the top eraser, there are rare earth magnets such as ferrite magnets, rare earth cobalt magnets (for example, samarium / cobalt magnets) and rare earth iron magnets (neodymium / iron magnets), and bonded magnets. Preferably, the magnetized type of the magnet is a double-sided magnetized IP.
Is preferable (under these conditions, 100 to 750 gauss). It is particularly preferable to use a rare earth magnet or ferrite magnet having isotropicity or anisotropy.
If the magnets and the types of magnetization under these conditions are selected, it is possible to cleanly erase.

The top eraser magnet used in the present invention is
It is an essential requirement to have a clearance, and by providing this clearance, generation of a magnetic field can be controlled, and as a result, characters, patterns, etc. recorded on the recording surface can be uniformly erased. This clearance amount is often determined by the material of the magnet. The method of providing the clearance is not particularly limited, and either an air layer may be provided between the honeycomb type magnetic display plate and the magnet of the erasing magnet or a non-magnetic material may be provided. In the present invention,
A method of integrating the magnet and the non-magnetic material is preferable.

The non-magnetic material is not particularly limited, but is preferably a non-porous material or a porous material such as resin, sponge or sponge-like resin, rubber, wood, cardboard, papers, fibers, glass and metal. Although it can be used, a porous material such as sponge or sponge-like resin is particularly preferable. These materials preferably slide smoothly on the recording display surface of the magnetic display plate. As a method of integrating the magnet and the non-magnetic body, any method such as adhesion or sandwiching may be used, and in the case of resin or rubber, any method such as integral molding of different materials may be used. Further, a clearance may be provided only on the erasing surface side of the magnet, or a clearance may be provided on both surfaces of the erasing magnet to eliminate the distinction of the magnets during erasing. When the clearance is provided on the front and back surfaces or the entire circumference or the entire surface of the magnet (when the magnet is wrapped), it is preferable to provide depressions or knobs for the fingers in order to facilitate handling.

FIG. 1 is a sectional view showing the eraser magnet and the honeycomb type magnetic display plate of the present invention. In FIG. 1, the shape of the upper eraser magnet I is not particularly limited to a square shape, a circular shape, an elliptical shape, or the like. The size is also arbitrary, and is set to an appropriate size according to the size of the honeycomb type magnetic display plate. The upper eraser magnet I has a clearance 3 on the lower surface of the eraser magnet 2, and is in contact with the surface 1 a of the honeycomb magnetic display plate 1 via the clearance 3. The condition at this time is that the thickness of the erasing magnet 2 is z = 2 to 20 mm.
And the thickness of the clearance 3 is z ′ = 0.2z˜20.
It is represented by z. Preferably z'is between 0.2z and 5.0z. More preferably, z'is 0.5z to 2.0z. Furthermore, z'is 0.5z to 1.0z. z is 2
If the size is other than 20 mm, handling becomes difficult in consideration of size, weight and the like. If z'is smaller than 0.2z, the magnetic field applied to the honeycomb-type magnetic display plate 1 approaches a vertical direction, and the plate surface becomes dark. On the other hand, if it exceeds 20 z, a magnetic field cannot be applied to the honeycomb type magnetic display plate, and the writing body cannot be erased, which is not preferable. These limits are particularly important for z ′ in order to appropriately apply a magnetic field to the honeycomb type magnetic display plate.

FIG. 2 is a sectional view showing the upper eraser magnet device. In FIG. 2, an erasing magnet 2 and a porous resin are integrally molded on the surface of a circular substrate 7 having a handle 9 to provide a clearance 3, and a nonwoven fabric 8 is further provided on this surface to form an overerasing erasing magnet device. To do. This non-woven fabric 8
Improves the slipperiness of the recording display surface.

As the writing magnet used in the present invention,
Ordinary writing magnets are used, but among them, multipolar magnets are preferably used. The type and material of this magnet may be the same as that of the erasing magnet. In particular, in the case of recording display or writing on a honeycomb type magnetic display plate in which the recording on the recording surface is erased by using an upper eraser magnet, it is noted that a part of the multipolar magnet is covered with metal. It is preferable that the magnet is a multi-pole magnet, and it is preferable that the magnet has a pen shape with a handle. FIG. 3 shows a writing multipole magnet used in the present invention, and FIG. 3A is a perspective view showing the writing multipole magnet. Further, FIG. 3B is a cross-sectional view taken along the line AB of the writing multipolar magnet. In FIG. 3, the writing multipolar magnet 20 has magnets 21, 22, 23, and 24 formed via the neutral 5. The neutral 5 is not particularly limited as long as it is made of a non-magnetic material, and for example, an adhesive is preferable.
As shown in FIG. 3B, such a multi-pole magnet 20 for writing has an arrangement of N and S poles in the multi-pole magnet 20, and arrangement of the magnets 21a, 21b and 21c in the front side is N. , S, N, and on the opposite pole, that is, the back surface, the magnets 21a, 21b, 21c
Are arranged like S, N, S.

FIG. 4 is a perspective view showing a writing multi-pole magnet pen used in the honeycomb type magnetic display plate used in the present invention. As shown in FIG.
To obtain a multipolar writing pen II for writing. That is, a conventional writing magnet is a single-pole magnet, a multi-pole magnet, or the like, and a thin and clear writing body is obtained on a honeycomb-type magnetic display plate or a microcapsule magnetophoretic display sheet that is erased from the back side. Although it is a known technique that
The top-erasing writing multi-pole magnet II used in the present invention has a very excellent effect when used for a honeycomb type magnetic display plate of front-erasing, front-erasing or top-erasing, that is, a continuous line is obtained,
It is very easy to see. The top eraser writing multipolar magnet II used in the present invention uses ferrite, rare earth, alnico, etc. as the material of the writing magnet 21, but is not limited to the material of the writing magnet 21.
More specifically, the double-sided magnetized IP is preferable as the type of magnetization of the writing magnet 21 (under these conditions, it becomes 700 gauss or more). In order to manufacture the writing multi-pole magnet by overwriting the writing magnet 21 via the neutral, the writing multi-pole magnet 20 is made by integrally molding the writing multi-pole magnet 20 with a plastic or the like leaving the tip. Is preferred.

The honeycomb type magnetic display plate used in the recording method using the erasable honeycomb type magnetic display plate of the present invention can be used for various purposes, for example, a picture book for infants, a toy for infants, characters. Practice equipment, various game boards, calligraphy boards, sheets or boards with an adhesive layer on the back side, memo boards, conference blackboards, various information boards in clean rooms,
Examples include electronic bulletin boards and display panels for personal computers.
In addition, as a special application, it can be used for producing machine-readable magnetic recording and as an inspection material for steel products.

[0021]

EXAMPLES Examples of the present invention will be shown below and described in more detail, but the present invention is not limited to these examples.

Example 1 (1) Preparation of Honeycomb Type Magnetic Display Plate: A honeycomb type magnetic display plate used in the present invention was prepared by the method described in Example 1 of JP-B-57-27463. That is, 200 parts of water, 200 of Aerosil
(Fine powder silicic acid manufactured by Nippon Aerosil Co., Ltd.) 4 parts, Emulgel 900 (nonionic surfactant manufactured by Kao Atlas Co., Ltd.) 0.4 part, Taipaque R-550 (Titanium manufactured by Ishihara Sangyo Co., Ltd.) White) 1.5 parts was kneaded to prepare a white plastic flowable liquid. Meanwhile, 20 parts of MRM-400 (magnetite manufactured by Toda Kogyo Co., Ltd.) and Acrypet VK
(50 parts of a 20% methacrylic acid toluene solution manufactured by Mitsubishi Rayon Co., Ltd. was combined, dried and pulverized to 100 to 250.
20 parts of # black magnetic particles were obtained. The magnetic particles are uniformly dispersed in the plastic flowable liquid, and an aluminum honeycomb having a vinyl chloride sheet bonded as a surface plate (cell size 3
mm, thickness 3 mm) and sealed as a back plate with a transparent vinyl chloride sheet to obtain a honeycomb type magnetic display plate (a). Further, an iron plate was attached to the back surface of this honeycomb type magnetic display plate (ii) to produce a honeycomb type magnetic display plate (ii).

(2) Fabrication of top eraser magnet: As shown in FIG. 2, ferrite was used as the material of the magnet 2 of the top eraser magnet device to form a coin shape. Diameter is φ
Was 30 mm and the thickness z was 3.0 mm. On the other hand, ABS resin (acrylonitrile
Using a porous body of butadiene-styrene resin), the diameter φ ₁ was 34 mm, the thickness z ′ was 2.0 mm, and the magnet 2 was integrally molded in a circular shape so as to cover it. Then, the clearance surface in contact with the recording / display surface was bonded with the non-woven fabric 8 to form a top eraser magnet device.

(3) Manufacture of top-erasing writing multi-pole magnet: FIG.
As shown in FIG. 4, the ferrite magnet 21 is adhered with an adhesive to produce a circular rod-shaped ferrite multi-pole magnet 20, and as shown in FIG. 4, a part of the multi-pole magnet 20 is exposed to produce a handle. Was integrally molded with a resin for use to produce a multipolar magnet pen II for overwriting.

(4) Method of recording on a honeycomb type magnetic display plate by using a combination of a honeycomb type magnetic display plate, an upper eraser magnet and an upper eraser multi-pole magnet: the honeycomb magnetic body prepared in the above (1) The following operations were performed on the entire recording display surfaces of the display plates (a) and (b). When the entire recording and display surface was scanned by the upper eraser magnet prepared in (2) above, a uniform gray-white surface with no unevenness was obtained on the entire recording and display surface. When characters were written on this display surface with the multipolar magnet pen for overerasing writing prepared in (3) above, clear characters with black contrast (reference A) were obtained. The lines were clear even when the distance between the lines was narrow. Further, when the characters thus drawn were erased by the eraser magnet prepared in (2) above, a uniformly grayish white surface (reference B) was obtained. Particularly in the honeycomb type magnetic display plate (b), clearer characters were obtained. On the other hand, when the erasing operation was performed with the conventional erasing magnet, the whole was darkened. When characters were written on this display surface with a multi-pole magnetic pen for erasing writing, there was almost no contrast and it was very difficult to read. As described above, according to the recording method using the honeycomb type magnetic display plate of the present invention, not only clear characters can be written, but also a uniform recording display surface without unevenness can be obtained. Further, when this honeycomb-type magnetic display plate was manufactured to have the size of a blackboard, the iron plate on the back surface kept the shape of the blackboard, and also played a reinforcing role to endure sufficient strength. Further, when the blackboard was scanned with the upper eraser magnet prepared in (2) above, a uniform light gray white surface with no unevenness was obtained on the entire recording and display surface. Then, when a large character was written with the overerased writing multi-pole magnet pen II prepared in (3) above, a clear black character with contrast was obtained.

Example 2 (1) Preparation of Honeycomb Magnetic Display Plate: A honeycomb magnetic display plate used in the present invention was prepared by the method described in Example 1 of JP-B-59-47676. That is, 898 parts of Isopar M (isoparaffin solvent manufactured by Esso Chemical Co., USA), Aerosil 20
0 (fine powder silicic acid manufactured by Nippon Aerosil Co., Ltd.) 125
Part, and Taipaque CR-50 (titanium oxide manufactured by Ishihara Sangyo Co., Ltd.) 1 part T.I. K. The mixture was kneaded with a homomixer (wet disperser manufactured by Tokushu Kika Kogyo Co., Ltd.) to obtain a white liquid.
On the other hand, 40 parts of Todacolor KN-320 (magnetite manufactured by Toda Kogyo Co., Ltd.) and 25 parts of 40% methyl ethyl ketone solution of EPORT YD-017 (solid epoxy resin manufactured by Toto Kasei Co., Ltd.) were kneaded and dried. , Crush and disperse 1
Black magnetic fine particles of 00 to 325 mesh were obtained. The white dispersed liquid was mixed and dispersed to meet the plastic dispersed liquid.

The yield value of this dispersed liquid was measured using a B-type viscometer and found to be 6.3 dyne / cm ³ .
Continuously, this plastic dispersion liquid is 4 mm each independent
Enclosed in each cell of a through-hole 1.3 mm thick multi-cell plate having ² cells, cover both sides with 0.1 mm thick polyester film using epoxy adhesive, and seal the periphery with adhesive. After that, a honeycomb type magnetic display plate (C) was obtained. Further, an iron plate was attached to the back surface of this honeycomb type magnetic display plate (C) to manufacture a honeycomb type magnetic display plate (D).
Using the thus obtained honeycomb type magnetic display plates (C) and (D), top erase was carried out in the same manner as in Example 1. As a result, the recording and display surface was entirely uniform and grayish white. The face was obtained. Moreover, when a character was written with a multi-pole magnetic pen for writing on top, a clear character with black contrast was obtained. The lines were clear even when the distance between the lines was narrow.

[0028]

The recording method using the honeycomb type magnetic display plate of the present invention has a multi-cell structure between two substrates and a dispersion liquid containing at least magnetic particles, non-magnetic particles and a dispersion medium in these cells. A combination of an enclosed honeycomb type magnetic display plate, a writing multi-pole magnet and a top eraser magnet is used to record on the recording display surface of the display plate or erase from the recording display surface side, that is, the above When an erase magnet was applied to the recording display surface of the honeycomb type magnetic display plate having the above structure and slid, a uniform gray-white erase surface was obtained. Further, by recording on the surface with a top-erasing multipolar magnet for writing, a clear recording display body can be formed without blurring between the lines. Further, according to the second aspect of the present invention, by providing a ferromagnetic material on the back surface of the honeycomb magnetic display plate, not only a clearer recording display body can be obtained, but also a large honeycomb magnetic display plate is provided. When making,
The honeycomb-shaped magnetic display plate is sufficiently retained in shape and serves as a reinforcing member.

In the third aspect of the present invention, when the honeycomb type magnetic display plate according to the first or second aspect is used,
Part of the magnet is covered with metal Writing with a multi-pole magnet for writing makes it possible to obtain an exceptionally clear recording display. The sharpness is clear when writing small letters. Also has an excellent effect of not losing clarity. In other words, it has an excellent effect that it can be displayed very clearly without blurring even in a narrow interval between two lines. Further, in the fourth aspect of the present invention, the erasing operation is performed by using an erasing magnet having a clearance on the display surface of the honeycomb type magnetic display plate according to any one of the first to third aspects, that is, an upper erasing magnet. When it is carried out, the excellent effect of obtaining a uniform and even display surface is obtained, and particularly when the clearance is a porous body, the more excellent effect is obtained.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state where an eraser magnet of the present invention slides on a honeycomb type magnetic display plate.

FIG. 2 is a sectional view showing the eraser magnet device of the present invention.

FIG. 3 is a drawing showing a multi-pole magnet for eraser and writing according to the present invention,
a is a perspective view thereof, and b is a sectional view thereof.

FIG. 4 is a perspective view showing a multi-pole magnetic pen for eraser writing of the present invention.

[Explanation of symbols]

1 Honeycomb type magnetic display plate 1a Transparent substrate 1b Substrates 2, 21, 21a, 21b, 21c Magnet 3 Clearance 4 Multi-cell structure 41 Cell I Top erase erase magnet 5 Neutral II Top erase multi-pole magnet pen for writing 6 Pattern A character State of magnetic powder in the part 7 Support substrate B State of magnetic powder in the part where characters are erased 8 Nonwoven fabric 9 Handle 20 Multi-pole magnet 21 Magnet

Claims (3)

[Claims] 1. A honeycomb-type magnetic display panel having a multi-cell structure between two substrates, in which a dispersion liquid containing at least magnetic particles, non-magnetic particles and a dispersion medium is enclosed, a multi-pole writing magnet, and A recording method using a honeycomb-type magnetic display plate, characterized by combining with an upper erasing magnet having a clearance, and using these to perform recording on the recording display surface of the display plate or erasing from the recording display surface side. 2. A recording method using a honeycomb type magnetic display plate according to claim 1, wherein a ferromagnetic material is provided on the back surface of said honeycomb type magnetic display plate. 3. A recording method using a honeycomb type magnetic display plate according to claim 1, wherein the clearance of the upper eraser magnet is a non-magnetic material.