JPH1016457A - Recorder for magnetic display medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of components for constituting an apparatus, to improve quality of an recorded image and to decrease power consumption. SOLUTION: The recorder 1 comprises an initialized part 100 and a recording part 200 of a magnetic display medium 2 having a display layer formed by dispersing at least magnetic material in a dispersion medium exhibiting a solid phase state at the time of ordinary temperature and a liquid phase state at the time of heating on a support. The part 100 includes a heating means 5 for heating an entire display layer of the medium to set the medium to the liquid phase state, and an entire surface magnetism applying means 4 disposed on the area for maintaining the medium of the display layer in the liquid phase state near the heating means to apply magnetism to the entire display layer. The part 200 includes a partial magnetism applying means 3 disposed on the area for maintaining the medium of the display layer in the liquid phase state near the applying means of the part 100 to partly apply the magnetism to the display layer of the medium.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording apparatus for a magnetic display medium on which visible information is recorded by heating and application of magnetism, and more particularly, to a reduction in the number of parts constituting the recording apparatus and an improvement in recorded image quality. The present invention relates to an improvement of a recording apparatus capable of further reducing power consumption.

[0002]

2. Description of the Related Art As this type of magnetic display medium, those described in JP-A-7-192104 and JP-A-7-29146 are known.

[0003] The magnetic display medium is abbreviated as a particulate or flaky dispersion medium on a support made of a transparent or opaque non-magnetic material, which exhibits a solid phase at normal temperature and a liquid phase at heating. A display layer formed by dispersing a magnetic material is formed. Note that the display layer may be formed by enclosing the dispersion medium and the magnetic material in microcapsules.

In this magnetic display medium, the dispersion medium in the display layer is brought into a liquid phase by heating, so that the magnetic substance in the display layer can move in the dispersion medium. When magnetism is applied to the display layer in this state, the magnetic material changes from an initial state by magnetophoresis when the magnetic material is particulate, and by magnetic orientation when the magnetic material is scaly. Is maintained in a solid state, and visible information is recorded on the display layer of the magnetic display medium.

This magnetic display medium is disclosed in
Compared with the display medium capable of reversible display only by magnetism disclosed in JP-A-56393, JP-A-62-53359, and the like, there is an advantage that the contrast is clear and the image stability is excellent.

Meanwhile, one applicant of the present application has already proposed a recording apparatus suitable for recording operation on a magnetic display medium (see Japanese Patent Application No. 7-218719).

That is, the recording apparatus comprises: an initializing section comprising an entire heating means for entirely heating the display layer of the magnetic display medium and an entire magnetic applying means for applying magnetism to the entire surface;
A recording unit comprising a partial heating unit for partially heating the display layer of the initialized magnetic display medium and a magnetic applying unit for applying magnetism to at least the heated portion. . More specifically, as shown in FIG. 7A, this recording apparatus uses a magnetic display medium a
A plurality of moving rollers b provided along the transfer path, and an initialization section e including a pair of full-surface heating means c and a full-field magnetism application means d provided opposite the transfer path, The recording section h including the pair of partial heating means f and the magnetic application means g provided constitutes a main part thereof.

Then, as shown in FIG. 7A, the magnetic display medium a passes through the entire heating means c and the entire magnet applying means d while gradually moving rightward by the moving roller b in this apparatus. At this time, the magnetic display medium (the display layer of the magnetic display medium in FIG.
The dispersion medium in the display layer in (a) is in a liquid phase state, and the magnetic body is in a movable state. (Magnetic application direction ↓) All migrate downward by magnetism. Then, when the dispersion medium in the display layer passes through the entire surface heating means c and the entire surface magnetic application means d, it quickly drops to room temperature and becomes a solid state, and this state is maintained. This is an initialization state.

Next, due to the action of the moving roller b, the magnetic display medium a passes through the partial heating means f and the magnetic applying means g as shown in FIG. 7B. At this time, the dispersion medium of the display layer in the portion heated by the partial heating means f is in a liquid phase state, and the magnetic body is movable, and is upwardly moved by magnetism by the magnetism applying means g (magnetism applying direction ↑). Electrophoresis occurs, but the unheated portion of the magnetic material remains below. Then, after passing through the partial heating means f and the magnetic application means g, the dispersion medium in the display layer drops to a normal temperature and becomes a solid state, and this state is maintained and visible information is recorded.

When the magnetic material in the display layer of the magnetic display medium a is scaly, when the magnetic display medium a passes through the entire heating means c and the entire magnetic applying means d in the initializing section e, it moves. The magnetic material is obliquely oriented by the vector composition of the direction and the magnetic application direction (↓) (see FIG. 8A). This is an initialization state. Further, in the recording section h, after the partial heating by the partial heating means f, the magnetic application medium g does not move the magnetic display medium a until the dispersion medium in the display layer drops to room temperature. When it is performed, it is oriented in the magnetic application direction, that is, in the vertical direction (see FIG. 8B). Then, visible information such as characters and figures can be recorded depending on whether the orientation of the scale-like magnetic material in the display layer is perpendicular or oblique to the display layer.

[0011]

In this recording apparatus, when the magnetic display medium a initialized by the initialization section e is carried into the recording section h including the partial heating means f and the magnetic application means g, If the dispersion medium in the display layer has not returned to room temperature (that is, maintains the liquid phase state), the portion of the recording section h that is not heated by the partial heating means f due to the full-field magnetizing action of the magnetizing means g. Since the magnetic material of (1) also undergoes magnetophoresis or magnetic orientation, the partial heating means f
Therefore, there is a problem that the visible information cannot be recorded on the display layer of the magnetic display medium or the recorded image quality is deteriorated.

In this case, it is possible to avoid such a problem by adding a cooling means such as a blower or a Peltier element to the initialization unit e and the recording unit h.
On the other hand, there is a problem that the number of components constituting the device is increased.

Further, the recording apparatus requires two heating means (entire heating means c and partial heating means f), and thus has a problem of large power consumption.

The present invention has been made in view of such a problem, and it is an object of the present invention to reduce the number of parts constituting the apparatus, improve the recorded image quality, and further reduce the power consumption. It is another object of the present invention to provide a recording apparatus capable of achieving the above.

[0015]

In other words, the invention according to claim 1 is to provide at least a magnetic material on a support made of a non-magnetic material in a dispersion medium which shows a solid state at normal temperature and a liquid phase at the time of heating. Assuming that the recording device is provided with an initialization section and a recording section of a magnetic display medium having a display layer formed by dispersing a liquid, the display layer of the magnetic display medium is entirely heated and the dispersion medium is in a liquid phase state. And the entire surface of the display layer is disposed in an area where the dispersion medium of the display layer can maintain a liquid phase state in the vicinity of the heating means and applies magnetism to the entire display layer. Part is constituted, and
Partial magnetic application in which the dispersion medium of the display layer is arranged in a region where the liquid phase state can be maintained in the vicinity of the entire surface magnetic application means in the initialization section and partially applies magnetism to the display layer of the initialized magnetic display medium. The recording unit is constituted by means.

According to the recording apparatus of the first aspect of the present invention, the dispersion in the display layer of the magnetic display medium initialized in the initialization section comprising the heating means and the entire-surface magnetic application means is performed. Since the recording is performed by applying the partial magnetizing means while the medium is in the liquid state, deterioration of image quality due to poor cooling of the dispersion medium in the conventional recording device is prevented. In addition to this, there is no need to basically add a cooling means such as an air blower and the like, and a conventional partial heating means is not required, so that the number of parts constituting the apparatus and the power consumption can be reduced.

In the recording apparatus according to the first aspect of the present invention, the heating means forms one of the initialization sections and heats the entire display layer of the magnetic display medium to set the dispersion medium to a liquid phase. Examples thereof include a hot plate (a flat heater), a roll-shaped heater, a hot air blower, an infrared laser, a thermal head, and a ceramic heater. When a hot plate (flat heater) is applied, by providing a heat-resistant elastic layer made of silicone resin or the like on the surface thereof, the adhesion between the hot plate and the display layer of the magnetic display medium is improved, and uneven heating is obtained. Etc. can be prevented. The invention according to claim 2 is made for such a reason.

That is, the invention according to a second aspect is based on the recording apparatus according to the first aspect, wherein the heating means is constituted by a planar heater having a heat-resistant elastic layer on the surface. It is a feature.

Also, applying a curved heater has the advantage that air is less likely to be trapped between the heater surface and the magnetic display medium than applying a hot plate having a flat surface. That is,
When air is entrained, image quality is likely to deteriorate due to uneven heating. The invention according to claim 3 is made for such a reason.

That is, a third aspect of the present invention is based on the recording apparatus according to the first aspect of the present invention, and has a loose curved surface shape having a heat-resistant elastic layer on the surface and a convex portion substantially at the center of the surface. The heating means is constituted by a curved heater.

Furthermore, when a roll-shaped heater having a heat-resistant elastic layer on the surface is applied, the adhesion between the heater and the display layer of the magnetic display medium can be improved, and the air between them can be improved. Entanglement can be prevented, and the space for disposing the heating means can be reduced. The invention according to claim 4 is made for such a reason.

That is, the invention according to a fourth aspect is based on the recording apparatus according to the first aspect, wherein the heating means is constituted by a roll-shaped heater having a heat-resistant elastic layer on the outer peripheral surface. It is characterized by the following.

Next, a permanent magnet, an electromagnet or the like is exemplified as a full-field magnetism applying means which constitutes the other of the initialization section in the recording apparatus according to the present invention and applies magnetism to the entire display layer of the magnetic display medium. You. In addition, about this arrangement position,
It is necessary to set a region in the vicinity of the heating means in a region where the dispersion medium of the display layer in the magnetic display medium can maintain a liquid phase state. That is, the dispersion medium of the display layer is appropriately set in a region where the liquid phase state can be maintained in consideration of the set temperature of the heating unit, the heating time, and the like.

On the other hand, as the partial magnetism applying means which constitutes the recording section and partially applies magnetism to the initialized display layer of the magnetic display medium, fine permanent magnets are arranged in a matrix and Examples thereof include a magnetic head structure selectively moving up and down by means such as a solenoid, an electromagnet structure capable of partially applying magnetism, and the like. Also, it is necessary to set the disposition position in a region where the dispersion medium of the display layer in the magnetic display medium can maintain the liquid phase state in the vicinity of the entire surface magnetic application means.

[0025]

Embodiments of the present invention will be described below in detail with reference to the drawings.

[First Embodiment] As shown in FIG. 1A, a recording apparatus 1 according to this embodiment includes a main casing 10 and a magnetic display medium 2 provided on a front portion of the main casing 10. An inlet 11 for inserting and discharging, a medium transfer means 12 provided in the main body casing 10 and comprising a plurality of moving rollers for reciprocally transferring the magnetic display medium 2 inserted from the inlet 11 in the insertion direction; Partial magnetism applying means 3 arranged in order along the transfer means 12,
The main part is constituted by the entire surface magnetic application means 4 and the heating means 5, and a pressing plate 55 having substantially the same shape is arranged on the side opposite to the heating means 5. The initialization unit 100 is constituted by the means 4 and the heating means 5, while the recording unit 20 is constituted by the partial magnetizing means 3.
0 is configured.

The heating means 5 has a heat-resistant elastic layer 50 made of silicone resin on the surface and has a temperature of at least 80 ° C.
A flat heater 51 capable of raising the temperature to the maximum, a support plate 53 for supporting the flat heater 51 via a pair of spring members 52, and a solenoid for vertically moving the support plate 53 to move the flat heater 51 up and down. 54, the main part is constituted, and the whole-surface magnetism applying means 4 is constituted by a belt-shaped permanent magnet extending in a direction perpendicular to the transport direction of the magnetic display medium. On the other hand, the partial magnetism applying means 3
Is composed of a magnetic head structure in which minute permanent magnets are arranged in a matrix and each permanent magnet is selectively moved up and down by a solenoid. The display layer of the magnetic display medium 2 used here is obtained by encapsulating a dispersion medium and a particulate magnetic material in microcapsules.

Then, the magnetic display medium 2 is stored in the recording device 1.
When the magnetic display medium 2 is inserted into the main body casing 10 from the inlet section 11 by the medium transfer means 12 comprising a plurality of moving rollers, the magnetic display medium 2 is transferred in the direction of the arrow (see FIG. 1A). It is carried into.

Next, when the medium transfer means 12 stops, the heating means 5 moves downward by the action of the solenoid 54, and the magnetic display medium 2 is sandwiched between the heating means 5 and the pressure plate 55 ( Further, the magnetic display medium 2 is entirely heated at 80 ° C. for 2 seconds to set the dispersion medium of the display layer to a liquid phase state. The magnetic display medium 2 is formed by the action of the spring material 52 and the heat-resistant elastic layer 50.
Is substantially evenly sandwiched between the heating means 5 and the pressing plate 55, and the magnetic display medium 2 is substantially uniformly heated over its entire surface.

Next, after the heating means 5 is moved upward by the action of the solenoid 54 to release the magnetic display medium 2 from the heating means 5 and the pressing plate 55, the medium transfer means 12 reverses the transfer direction. Then, the transfer is resumed, and the magnetic display medium 2 is transferred to the entire magnetic applying means 4 while the dispersion medium of the display layer is maintained in the liquid phase state, and the magnetic applying medium 4 (magnetic direction ↓) is applied. All the magnetic substances in the display layer migrate downward (see FIG. 1C). Furthermore,
In this state, the magnetic display medium 2 is transferred to the partial magnetism applying means 3 while the dispersion medium of the display layer is maintained in a liquid phase state, and the magnetic field is displayed by the partial magnetism of the partial magnetism applying means 3 (magnetization direction ↑). Part of the magnetic material in the layer migrates upward.

The magnetic display medium 2 that has passed through the partial magnetism applying means 3 is naturally cooled while being transferred to the entrance 11 of the recording apparatus 1, and the dispersion medium of the display layer drops to room temperature, The state is changed to the solid state, and the above state is maintained. Then, it is possible to record visible information such as characters and figures depending on whether the position where the magnetic material exists is above or below the display layer.

Next, the recording apparatus 1 according to this embodiment
Will be further described with reference to the block diagram of FIG. 3 and the flowchart of FIG.

As shown in FIG. 3, the control means 300 includes a heating means 301, a medium transfer means 302,
03 and the partial magnetism applying means 304 is controlled.

First, when the magnetic display medium 2 is inserted into the main body casing 10 from the entrance 11 of the recording apparatus 1, the operation of the recording apparatus 1 starts (step 401), and the magnetic display medium 2 is held by the moving roller. (Step 402).

Next, the medium transfer means 302 is operated by the instruction of the control means 300, and the magnetic display medium 2 is transferred in the direction of the arrow in FIG. 1A, and is carried between the heating means 5 and the pressing plate 55 (FIG. 1A). Step 403).

Next, the operation of the medium transfer means 302 is stopped by the instruction of the control means 300 and the heating means 301
Operates to move the planar heater 51 downward and start the heating operation (step 404).

Then, after the entire surface is heated at 80 ° C. for 2 seconds, the heating means 301 is operated by the instruction of the control means 300 to move the flat heater 51 upward, stop the heating operation, and The medium transporting means 302 operates in accordance with an instruction from the control means 300 to reverse the rotation direction of the moving roller, thereby transporting the magnetic display medium 2 to the full-area magnetic applying means 4, and in accordance with the instruction from the controlling means 300, Operates and the magnetic display medium 2
(Step 40)
5) The magnetic display medium 2 is set in an initialized state.

Further, the operation of the medium transfer means 302 is continued to transport the magnetic display medium 2 to the partial magnetism applying means 3, and the partial magnetism applying means 304 is operated by the instruction of the control means 300, and The magnetism is partially applied to the second display layer (step 406), and information is recorded in a portion where the magnetism is applied.

Then, the medium transfer means 302 operates to convey the magnetic display medium 2 to the entrance 11 of the recording apparatus 1, and the magnetic display medium 2 is released from the moving roller at this position (step 407). Then, the operation of the recording device 1 is completed (step 408), and the visible information is recorded on the display layer of the magnetic display medium 2.

In the recording apparatus 1, a flat heater 51 having a heat-resistant elastic layer 50 made of silicone resin on the surface is used as the heating means 5, but the flat heater 51 is used instead. As shown in FIG. 2, the heating means 5 may be constituted by a curved heater 61 having a similar heat-resistant elastic layer 60 on the surface and having a mildly curved surface shape having a convex surface substantially at the center. . When this curved heater 61 is applied, there is an advantage that uneven heating can be prevented since air is hardly caught between the heater surface and the magnetic display medium.

[Second Embodiment] As shown in FIG. 5A, a recording apparatus 8 according to this embodiment includes a main body casing 80 and a magnetic display medium 2 provided on a front portion of the main body casing 80. An inlet section 81 for inserting and discharging, a medium transfer means 82 provided in the main body casing 80 and comprising a plurality of moving rollers for reciprocatingly transferring the magnetic display medium 2 inserted from the inlet section 81 in the insertion direction; Partial magnetism applying means 9 arranged in order along the transfer means 82
1. The main part is constituted by the entire-surface magnetism applying means 92 and the heating means 93, and the initialization section 300 is constituted by the entire-surface magnetism applying means 92 and the heating means 93. The recording unit 400 is constituted by the means 91.

The heating means 93 is provided with a heat-resistant elastic layer 95 made of silicone resin on the surface thereof, and is a roll-shaped heater 9 rotatable forward and reverse and capable of raising the temperature to at least 80 ° C.
6, a pair of spring members 98 are attached to both ends of the rotating shaft 94 of the roll-shaped heater 96 to urge the roll-shaped heater 96 downward.
On the opposite side of the roll-shaped heater 96, a pressure roller 97 that can rotate forward and reverse is disposed.

On the other hand, the full-surface magnetism applying means 92 is constituted by a belt-shaped permanent magnet extending in a direction perpendicular to the direction of transport of the magnetic display medium.
Is composed of a magnetic head structure in which minute permanent magnets are arranged in a matrix and each permanent magnet is selectively moved up and down by a solenoid. The display layer of the magnetic display medium 2 used here has a dispersion medium and a particulate magnetic material encapsulated in microcapsules, as in the first embodiment.

Then, the magnetic display medium 2 is stored in the recording device 8.
When the magnetic display medium 2 is inserted into the main body casing 80 through the inlet 81, the magnetic display medium 2 is transferred in the direction of the arrow by the medium transfer means 82 including a plurality of moving rollers (see FIG. 5A). It is carried in between the press roller 96 and the pressure roll 97 and discharged in the left direction in the drawing.

Next, the rotating direction of the moving roller of the medium transfer means 82, the roll-shaped heater 96 and the pressure roll 97 is reversed, and the magnetic display medium 2 is transferred rightward in the drawing. When passing between the pressure rolls 97 (see FIG. 5B), the entire surface of the magnetic display medium 2 is heat-treated, and the dispersion medium of the display layer is set in a liquid phase state.

Next, the magnetic display medium 2 is heated by a roll-shaped heater 9.
6 and the pressure roll 97, the magnetic display medium 2 is transferred to the full-field magnetism applying means 92 while the dispersion medium of the display layer is maintained in the liquid phase state, and the whole magnetic-field applying means 92 ( Due to the magnetic action in the magnetic application direction ↓), all the magnetic substances in the display layer migrate downward (see FIG. 5C). Furthermore,
In this state, the magnetic display medium 2 is transferred to the partial magnetism applying means 91 while the dispersion medium of the display layer is maintained in the liquid phase state, and is displayed by the partial magnetism of the partial magnetism applying means 91 (magnetic application direction ↑). Part of the magnetic material in the layer migrates upward.

The magnetic display medium 2 having passed through the partial magnetism applying means 91 is naturally cooled while being transported to the entrance 81 of the recording device 8, so that the dispersion medium of the display layer falls to room temperature, The state is changed to the solid state, and the above state is maintained. Then, it is possible to record visible information such as characters and figures depending on whether the position where the magnetic material exists is above or below the display layer.

Next, the recording device 8 according to this embodiment
Will be further described with reference to the block diagram of FIG. 3 and the flowchart of FIG.

As shown in FIG. 3, the control means 300 includes a heating means 301, a medium transfer means 302,
03 and the partial magnetism applying means 304 is controlled.

First, when the magnetic display medium 2 is inserted into the main body casing 80 from the entrance 81 of the recording device 8, the operation of the recording device 8 starts (step 801), and the magnetic display medium 2 is held by the moving roller. (Step 802).

Next, the medium transfer means 302 is operated in accordance with an instruction from the control means 300, and the magnetic display medium 2 is transferred in the direction of the arrow in FIG. After being carried into and ejected between the rollers 97, the medium transporting means 302 and the heating means 301 are operated by the instruction of the control means 300 to reverse their rotation directions, and a magnetic display is again displayed between the roll heater 96 and the pressure roll 97. The medium 2 is loaded (Step 803), and the heating operation of the roll-shaped heater 96 is started (Step 804).

Then, the entire surface of the magnetic display medium 2 is heated by passing the magnetic display medium 2 between the roll-shaped heater 96 and the pressurizing roll 97. In response to an instruction from the control means 300, the entire-surface magnetism applying means 303 is operated to uniformly apply magnetism to the display layer of the magnetic display medium 2 (step 805), and the magnetic display medium 2 is set to an initialized state.

Further, the operation of the medium transfer means 302 is continued to convey the magnetic display medium 2 to the partial magnetism applying means 91, and the partial magnetism applying means 304 is operated by the instruction of the control means 300, and The magnetism is partially applied to the second display layer (step 806), and information is recorded in a portion where the magnetism is applied.

Then, the medium transfer means 302 operates to convey the magnetic display medium 2 to the entrance 81 of the recording device 8, and at this point the magnetic display medium 2 is released from the moving roller (step 807). Then, the operation of the recording device 8 is completed (step 808), and visible information is recorded on the display layer of the magnetic display medium 2.

[0055]

According to the recording apparatus of the first aspect of the present invention, the dispersion medium in the display layer of the magnetic display medium initialized by the initialization unit including the heating means and the full-field magnetism application means. Since the recording is performed by applying the partial magnetism applying means while maintaining the liquid phase state, it is possible to prevent the deterioration of the image quality and the like due to the cooling failure of the dispersion medium in the conventional recording apparatus. In addition, since there is basically no need to add a cooling means such as an air blower and the like and no need for a partial heating means, there is an effect that the number of parts constituting the apparatus can be reduced and the power consumption can be reduced.

According to the recording apparatus of the present invention, since the heating means is constituted by the planar heater having the heat-resistant elastic layer on the surface, the heating means and the display on the magnetic display medium are provided. 4. The recording apparatus according to claim 3, wherein the adhesion to the layer is improved to prevent uneven heating, and the recording apparatus according to the invention has a heat-resistant elastic layer on the surface and a substantially central portion on the surface. Since the heating means is constituted by a curved heater having a gentle curved surface shape having a convex surface, air is hardly trapped between the heater surface and the magnetic display medium.

Further, according to the recording apparatus of the present invention, since the heating means is constituted by the roll-shaped heater having the heat-resistant elastic layer on the outer peripheral surface, the heater and the display on the magnetic display medium are performed. This has the effects of improving the adhesion to the layer, preventing the entrapment of air between them, and reducing the space for disposing the heating means.

[Brief description of the drawings]

FIGS. 1A to 1C are explanatory diagrams illustrating the configuration and operation of a recording apparatus according to a first embodiment.

FIG. 2 is an explanatory view showing a modification of the heating unit of the recording apparatus according to the first embodiment.

FIG. 3 is a block diagram of the recording apparatus according to the first embodiment and the second embodiment.

FIG. 4 is a flowchart of the recording apparatus according to the first embodiment.

FIGS. 5A to 5C are explanatory diagrams illustrating the configuration and operation of a recording apparatus according to a second embodiment.

FIG. 6 is a flowchart of the recording apparatus according to the second embodiment.

FIG. 7 is an explanatory diagram illustrating the configuration and operation of a conventional recording apparatus.

FIG. 8 is an explanatory diagram illustrating the configuration and operation of a conventional recording apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Recording device 2 Magnetic display medium 3 Partial magnetism applying means 4 Full-surface magnetism applying means 5 Heating means 100 Initialization part 200 Recording part

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Zhang Matsuo 1-5-1, Taito, Taito-ku, Tokyo Letterpress Printing Co., Ltd. (72) Inventor Kosaku Murata 1920, Kami Koizumi, Oizumi-cho, Ouraku-gun, Gunma Pref.

Claims (4)

[Claims] 1. A magnetic display medium comprising a support made of a non-magnetic material and a display layer formed by dispersing at least a magnetic substance in a dispersion medium that exhibits a solid state at room temperature and a liquid phase during heating. A heating device for entirely heating the display layer of the magnetic display medium and setting the dispersion medium to a liquid phase state, and the display layer in the vicinity of the heating device. The initializing section is composed of a dispersing medium disposed in a region where a liquid phase state can be maintained and a magnetic field applying means for entirely applying magnetism to the display layer, and a magnetic field applying means in the initializing section. The recording unit is configured by a partial magnetism applying unit that is arranged in a region where the dispersion medium of the display layer can maintain a liquid phase state in the vicinity of and that partially applies magnetism to the display layer of the initialized magnetic display medium. Characterized by being magnetic Display media recording device. 2. A recording apparatus for a magnetic display medium according to claim 1, wherein said heating means is constituted by a planar heater having a heat-resistant elastic layer on the surface. 3. The heating means according to claim 1, wherein said heating means is constituted by a curved heater having a heat-resistant elastic layer on the surface and having a gentle curved shape with a convex portion substantially at the center of the surface. Recording device for magnetic display media. 4. A recording apparatus for a magnetic display medium according to claim 1, wherein said heating means is constituted by a roll-shaped heater having a heat-resistant elastic layer on the outer peripheral surface.