JPH06282697A - Magnetic medium and magnetic medium processor - Google Patents

Abstract

PURPOSE:To provide the magnetic medium which can display only a character magnetic latent image without making encode magnetic information visible when a facility user generates any doubt in utilizing a facility utilizing card. CONSTITUTION:This magnetic medium is provided with a first magnetic recording layer 3 composed of a high coercive force magnetic material so as to record the encode information and a second magnetic recording layer 5 having smaller coercive force than the coercive force of the first magnetic recording layer 3 and recording character information for display, which can be made visible by a magnetic latent image/visible image converting means 40, as the latent image, a magnetic shielding layer 4 composed of a soft magnetic material is provided on the first magnetic recording layer 3 for confining the line of magnetic force of the encode information recorded on the first magnetic recording layer 3 so as not to leak it outside, and the encode information recorded in the first magnetic recording layer 3 is prevented from being made visible by the magnetic latent image/visible image converting means 40.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic medium such as a commuter pass used in an automatic ticket gate system and a magnetic medium processing apparatus.

[0002]

2. Description of the Related Art In recent years, for example, in railways, for the purpose of labor saving of ticket gates, it is provided at an entrance or exit of a facility such as a railroad, and when a user who uses the facility enters or exits the facility, When transferring, take in the commuter passport carried by the user and inspect it, and if the commuter pass is valid or the use of the commuter pass is legitimate, allow the passage of the user,
An automatic ticket gate has been introduced to prevent users from passing if there is fraud.

Such an automatic ticket gate apparatus reads the information (for example, an entrance station or an exit station) magnetically recorded on a commuter ticket inserted by a user at the time of entrance, exit or transfer, and reads it. It decides whether to allow or block the passage of the user based on the information. Automatic ticket gate systems using such magnetic commuter tickets are becoming popular.

On the other hand, Japanese Patent Laid-Open Publication No. 3-116594 and Japanese Patent Laid-Open Publication No. 3-163594 propose a technique for providing a commuter ticket with a recording display layer capable of repetitive recording and changing the state of the recording display layer when entering or exiting.
219432 and the like. Further, a proposal of an automatic ticket gate using a commuter ticket provided with a recording unit for recording commuter ticket information and means for rewritably displaying the remaining number of used tickets is disclosed in JP-A-3-151.
294.

These are excellent in that images can be repeatedly recorded and erased, but their repeated durability is insufficient for repeated use several thousand times like a commuter pass. Further, since thermal recording, which has a slower recording speed than that of magnetic recording, is added, there is a problem that the processing time becomes long.

Japanese Patent Laid-Open No. 50-94906 discloses a display medium in which a space is provided on a magnetic recording layer in a part of a medium and a magnetic powder is enclosed in the space as a method excellent in repeated durability. In this proposal, at least a part of the code magnetic information is converted into characters and magnetically recorded, and a magnetic powder enclosed in a magnetic card makes a visible image so that it can be visually recognized from the outside. However, this medium has a problem that the mechanical strength is weak because of the space provided in the medium.

With respect to such a problem, Japanese Patent Laid-Open No. 63-2
No. 71698 discloses a technique of recording information about a transaction as a magnetic latent image of characters on a part of a magnetic recording layer of a magnetic card and visualizing it by using a special viewer. In this display system, since the same display unit that has been conventionally used as the magnetic recording layer can be used, the above problem can be solved.

[0008]

However, in this technique, the magnetic information encoded simultaneously with the magnetic latent image of the character can be visualized by the same means, which causes a problem in the security of the encoded magnetic information.

Therefore, there is a demand for a device that can display only the magnetic latent image of characters without visualizing the encoded magnetic information when the facility user has doubts about the use of the facility use card.

The present invention has been made in view of the above circumstances. A first object of the present invention is to make encoded magnetic information visible without making a facility user suspicious of using a facility use card. An object of the present invention is to provide a magnetic medium capable of displaying only a character magnetic latent image.

A second object of the present invention is to provide a magnetic medium processing apparatus capable of reading and writing magnetic information on the magnetic medium as described above.

[0012]

The present invention provides, as a magnetic medium for solving the above problems, a first magnetic recording layer made of a high coercive force magnetic material for recording encoded information,
A second magnetic recording layer having a coercive force smaller than the coercive force of the first magnetic recording layer and recording character information for display which can be visualized by a magnetic latent image visualization means as a latent image;
And a magnetic shielding layer made of a soft magnetic material for containing magnetic field lines of the encoded information recorded on the first magnetic recording layer so as not to leak to the outside. is there.

Further, as a magnetic medium processing device for solving the above problems, a first magnetic recording layer for recording encoded information, which is made of a high coercive force magnetic material, and a coercive force of the first magnetic recording layer are used. A second magnetic recording layer which has a small coercive force and which records character information for display which can be visualized by a magnetic latent image visualization means as a latent image, and a first magnetic recording which is provided on the first magnetic recording layer. For a magnetic medium provided with a magnetic shield layer made of a soft magnetic material for containing magnetic field lines of the encoded information recorded in a layer so as not to leak to the outside, information of the information for the first and second magnetic recording layers is recorded. A magnetic medium processing device for writing and reading, comprising a medium transport path for transporting the magnetic medium, and a saturation magnetic generation that saturates the magnetic shielding layer of the magnetic medium transported through the medium transport path. A first reading unit that includes a material and reads the encoded information written in the first magnetic recording layer; and an encoding that is updated in the first magnetic recording layer of the magnetic medium conveyed through the medium conveying path. The first to write information
Writing means, second writing means for writing character information for display as a latent image on the second magnetic recording layer of the magnetic medium conveyed through the medium conveying path, and the second writing means. Second reading means for reading by the writing means to confirm the character information for display written in the second magnetic recording layer, and a saturation magnetic element for bringing the magnetic shield layer of the magnetic medium into a saturated state. A third reading unit which includes a generating member and which is read by the first writing unit to confirm the updated encoded information written in the first magnetic recording layer, and a soft magnetic material on the high coercive force magnetic film. What is claimed is: 1. A recording apparatus using a magnetic medium, comprising: a recording section for recording encoded information, which is provided with a magnetic shielding film; , In the magnetic latent image forming part of the magnetic medium Is obtained by become comprises a converting means for converting the visible image forming a magnetic latent image is sensitive to air.

[0014]

In the above magnetic medium, the encoded information is recorded on the first magnetic recording layer made of a high coercive force magnetic material, and the second magnetic recording layer has a coercive force smaller than that of the first magnetic recording layer. Character information for display which can be visualized by the magnetic latent image visualization means can be recorded as a latent image on the magnetic recording layer. Moreover, a magnetic shielding layer made of a soft magnetic material is provided on the first magnetic recording layer so that the magnetic lines of force of the encoded information recorded in the first magnetic recording layer are contained so as not to leak outside. Therefore, even in the visible image conversion area by the magnetic viewer, it is possible to visualize only the character magnetic latent image without visualizing the encoded information.

Further, in the above magnetic medium processing apparatus,
Since the reading unit including the saturation magnetic field generation member that brings the magnetic shield layer of the magnetic medium into the saturated state is provided, it is possible to read the encoded information written in the magnetic recording layer. Further, when the encoded information is written in the magnetic recording layer, the writing means may be one having a sufficient output for magnetizing the magnetic recording layer. At this time, the coercive force of the magnetic shielding layer is Since it is extremely small, magnetic recording is not performed on the magnetic shield layer, and recording can be performed only on the magnetic recording layer.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the magnetic medium of the present invention will be described below with reference to FIGS. FIG. 1 is a sectional view showing the structure of a commuter pass 1 as a magnetic medium of the present invention.

In this commuter pass 1, a first magnetic recording layer 3 is provided on one surface (a lower surface in the figure) of a base material 2, a magnetic shielding layer 4 is further provided on the magnetic recording layer 3, and a base material is provided. The second magnetic recording layer 5 for display is provided on the other surface (upper surface in the figure) of 2, and the print layer 6 is further provided on the magnetic recording layer 5 for display. As the base material 2, a plastic sheet is generally used, and here, polyester having a thickness of 188 μ is used. The magnetic recording layer 3 is a layer having a thickness of about 6 μm for recording fixed information such as an effective section and an effective period, or information about entrance and exit by encoding.
1.0 ~ 5.0 x 10 ⁶ It has a coercive force (coercive force) of about / (4π) · A / m.

The magnetic shield layer 4 is a layer made of a soft magnetic material.
And 5.0 × 10 with a thickness of about 10 μm^Four / (4π) ・ A /
It has a coercive force of about m. The magnetic shield layer 4 has a high magnetic permeability.
It is desirable to use a material with a small coercive force.

The magnetic recording layer 5 for display is a layer for forming a magnetic latent image of characters, has a thickness of about 6 μm, and has a coercive force of 0.3 to 1.0 ×.
10 ⁶ / (4π) · A / m, residual magnetic flux 1.0 to 2.0
× 10 ⁸ It has a magnetic property of Wb / cm. As will be described later, the magnetic latent image on the magnetic recording layer 5 is visualized by the magnetic powder of the magnetic latent image-visible image converting member. Therefore, a sufficient residual magnetic flux is required to attract the magnetic powder. The print layer 6 is a print layer for recording a valid section, a valid period, a user name, etc.,
For example, it is an ink receiving layer recorded by a thermal transfer recording device.

The magnitude relationship of the coercive force between the magnetic recording layer 3 and the magnetic recording layer 5 for display is important. That is, the process management in the automatic ticket gate system using the magnetic commuter pass is performed by the encoded information recorded in the magnetic recording layer 3. Therefore, the encoded information on the magnetic recording layer 3 should not be destroyed or read by the writing of the magnetic information in the magnetic recording layer 5 or the magnetic latent image.

Therefore, the coercive force of the magnetic recording layer 5 needs to be smaller than that of the magnetic recording layer 3, and the substrate 2
Depending on the thickness of the magnetic recording layer, the coercive force of the magnetic recording layer 5 is preferably ⅓ or less of the coercive force of the magnetic recording layer 5 in the thickness of a commonly used commuter pass (up to 220 μm thick). For example, the coercive force of the magnetic recording layer 3 is 3.0 × 10 ^6. / (4π) ・ A /
m, the coercive force of the magnetic recording layer 5 is 0.6 × 10 ⁶ / (4π)
・ It is a / m.

FIG. 2 shows the commuter pass 1 shown in FIG.
FIG. 3 is a diagram showing a layout of a display area when viewed from the side, showing a fixed information printing unit 7 formed by the printing layer 6.
And a display recording section 8 formed by the magnetic recording layer 5 for display.

The fixed information printing section 7 is a section on which fixed information such as the valid period and the valid section is printed, and the display recording section 8 is a date and time of entry, a boarding or leaving date and time, an entry and exit station, etc. It is a part that forms information about participation as a magnetic latent image in a character form. Here, since the magnetic recording layer 5 corresponding to the display recording section 8 is covered with the printing layer 6, a tint block may be printed on this portion.

In the commuter pass 1 as the magnetic medium according to the present invention, however, when a facility user has a doubt about the use of the facility, a magnetic latent image-visible image converting member 40, which will be described later, is provided on the surface of the commuter pass 1. That is, the character magnetic latent image recorded on the portion corresponding to the display recording portion 8 of the magnetic recording layer 5 for display is applied to the surface on the side of the printing layer 6 so that the magnetic latent image-visible image conversion member. Visualized with 40 magnetic powders. At this time, the encoded information of the magnetic recording layer 3 requiring security is not visualized by the base material 2 serving as a magnetic shielding layer.

Further, even when the magnetic latent image-visible image converting member 40 is applied to the back surface of the commuter pass 1, the magnetic recording layer 3 which encodes and records fixed information such as an effective section and an effective period or information about entrance and exit. Since the surface of the magnetic recording layer 3 is covered with the magnetic shielding layer 4, the magnetic field lines of the historic latent image of the magnetic recording layer 3 are shielded by the magnetic shielding layer 4 and do not appear on the surface of the magnetic shielding layer 4. Therefore, the security of the encoded magnetic information of the magnetic recording layer 3 is protected. Next, a second embodiment of the magnetic medium of the present invention will be described with reference to FIGS.

FIG. 3 shows a sectional structure of a commuter pass 10 as a magnetic medium. In this commuter pass 10, a printing layer 6 is provided on one surface (upper surface in the figure) of the base material 2. Print layer 6
Is a layer for recording an effective section, an effective period, a user name, etc., which is, for example, an ink receiving layer by a thermal transfer system.

On the other surface (lower surface in the drawing), a magnetic recording layer 12 is formed which also serves as a magnetic recording layer 3 for recording encoded information and a display magnetic recording layer 5 for forming a magnetic latent image of characters. There is. The magnetic recording layer 12 has a thickness of about 6 μm.
m, coercive force 3 × 10 ⁶ It is a high coercive force magnetic film of / (4π) · A / m.

A magnetic shield layer 13 is laminated on the magnetic recording layer 12 at a portion corresponding to the magnetic recording portion 11. As the magnetic shield layer 13, one having a high magnetic permeability and a small coercive force is suitable. 5.0 × 1 with a thickness of about 10 μm
0 ⁴ It has a coercive force of / (4π) · A / m.

Further, in a state where the magnetic shield layer 13 and the exposed portion of the magnetic recording layer 12 where the magnetic shield layer 13 is not provided, that is, the magnetic recording portion 8 for display, is covered, the pre-printed surface 14 such as a caution phrase is formed. Are formed. 4 is a commuter pass 1
It is a figure which shows the layout of a display area when seeing 0 from the pre-printing surface 14 side.

As shown in FIG. 4, a magnetic recording section 8 for display for forming a magnetic latent image of characters and a magnetic recording section 11 for recording encoded information are provided. That is, the commuter pass 10 is characterized in that magnetic information can be written and read only from one side and the thickness of the base material 2 does not need to be increased.

When magnetic recording layers are provided on both sides of the base material 2, there is a possibility that the magnetic latent image recorded on the other surface may interfere when reading magnetic information.
It is necessary to take measures such as thickening. If the base material 2 becomes thick, it becomes difficult to bend the card, and the transport path for sending the card to the bending drawing becomes long, or the contact condition of various recording heads on the card surface becomes strict. There may be problems.

The commuter pass 10 as a magnetic medium shown here
In this case, since the two magnetic recording units 11 and 8 are arranged in parallel in the plane direction of the commuter pass 10 (face of the bill), the magnetic latent images formed on each do not interfere with each other when reading and the conventional base material is used. The thickness of In order to display the character latent image on the magnetic recording layer as a visible image, even if the magnetic latent image-visible image converting means is arranged not only in the magnetic recording section 8 but also in parallel with the magnetic recording section 11 arranged side by side, The lines of magnetic force of the magnetic latent image of the recording unit 11 are shielded by the magnetic shield layer 13 and do not appear outside the preprint surface 14. On the other hand, the magnetic lines of force of the magnetic latent image of the display recording section 8 without the magnetic shield layer 13 reach outside the printing surface, so that it can be visualized by an appropriate magnetic latent image-visible image conversion means. As a result, the security of the encoded magnetic information of the magnetic recording layer 12 is protected. FIG. 5 schematically shows the configuration of an embodiment of an automatic ticket gate apparatus as a magnetic medium processing apparatus for processing the commuter pass 10 which is a magnetic medium.

The commuter pass 10 is inserted into the receiving port 15 and is discharged to the discharging port 16 via the transport path 17. On the transport path of the transport path 17, along the receiving port 15 and the discharge port 16, an aligning means (not shown) and the magnetic recording unit 11 of the commuter pass 10 are provided.
The read heads 20 and 21 as first reading means for reading the encoded information written in, and the write head as first writing means for writing the updated code information in the magnetic recording portion 11 of the commuter pass 10. 22, 23, write heads 24 and 25 as second writing means for forming a magnetic latent image in an image form on the display recording portion 8 of the commuter pass 10, and the display magnetic recording portion 8
The read heads 26 and 27 as the second reading means for confirming the magnetic latent image of the character written in and the read heads 28 and 29 as the third reading means for confirming the updated and written encoded information are sequentially provided. Has been.

The back roller 3 is attached to each of the heads 20 to 29.
1, ... Are provided respectively. Further, detectors 32, ... Which detect passage of the commuter pass 10 are arranged at predetermined positions in the transport path 17.

Further, a gate 34 as a sorting means for sorting the commuter pass 10 into the outlet 16 or a receiving box 33 as a storing means, and a door 35 as a blocking means for blocking passage of a user by closing it. It is provided. Two read heads and two write heads are provided above and below each part in order to enable reading and writing regardless of which side the commuter pass 10 is inserted.

FIG. 6 shows the reading as a reading means for reading information from the magnetic recording layer 12 whose surface is covered with the magnetic shielding layer 13, that is, the magnetic recording portion 11 for recording the encoded information. 1 schematically shows a configuration of heads 20 and 21. The read heads 20 and 21 read the encoded information recorded on the magnetic recording layer 12 and the first head 70 as a saturation magnetic generation member for bringing the magnetic shield layer 13 into a saturated state. Of the double head having the second head 72 as the reading member.

FIG. 7 schematically shows a control system of the automatic ticket gate apparatus shown in FIG. The control system of the automatic ticket gate has a central processing unit (hereinafter abbreviated as CPU) 50 as a control means for controlling the entire automatic ticket gate.

In this CPU 50, a read-only memory (hereinafter abbreviated as ROM) 51 in which a control program of the CPU 50 is recorded, recording of information read from the commuter pass 10 and information as a buffer of the control program. Random access memory (hereinafter R
52), and the fare information corresponding to the entrance station (or the entrance station code corresponding to the entrance station) that was used when using the same-day ticket or prepaid card and started using the same-day ticket or prepaid card. The recorded fare memory 53 is connected.

Further, a read circuit 54 for controlling the read heads 20 and 21, a write circuit 55 for controlling the write heads 22 and 23, and a write circuit 5 for controlling the write heads 24 and 25.
6, a read circuit 57 that controls the read heads 26 and 27, a read circuit 58 that controls the read heads 28 and 29, and the detector 3
2, a commuter pass detection circuit 59 for detecting the carrying state of the commuter pass 10, and a carrying motor 60 which is a drive source for the back rollers 31 ... To carry the commuter pass 10 along the carrying path 17. A transport control circuit 61 for controlling the sheet is connected.

Further, a door control circuit 63 for controlling a door opening / closing mechanism 62 for driving the door 35 as a blocking means, a character generator 64 for generating a character pattern corresponding to a character code, a control panel (not shown) for controlling an automatic ticket gate, Alternatively, a transmission control circuit 65 for transmitting information to and from a host computer or the like is connected. Next, processing of the commuter pass 10 in the apparatus shown in FIG. 5 will be described.

The commuter pass 10 is inserted by the customer into the entrance 15. A detection signal of the commuter pass 10 from the detector 32 is output to the CPU 50. The CPU 50 determines that the commuter pass 10 has been inserted, and drives the carry motor 60 that carries the back rollers 31 ,. As a result, the commuter pass 10 is transported on the transport path 17.

The taken-in commuter pass 10 is aligned by an aligning mechanism (not shown) as aligning means, and the read information is read by the read heads 20 and 21 as magnetic read means, and the encoded information of the magnetic recording layer 12 corresponding to the magnetic recording portion 11 is read. Is read and C
It is output to the PU 50.

The magnetic recording layer 12 corresponding to the magnetic recording portion 11
Are covered with a magnetic shield layer 13. Therefore, the magnetic force lines due to the magnetic information recorded in the magnetic recording layer 12 are confined in the magnetic shield layer 13, and the magnetic information cannot be read directly.

The magnetic shield layer 13 is made of a permanent magnet or an electromagnet.
Is saturated and the magnetic information of the lower magnetic recording layer 12 is read. It is determined whether or not the read valid period and valid section are valid. If not valid, CPU 50
Drives the door control circuit 63 and the door opening / closing mechanism 62 to close the door 35, the user is denied entry, and the commuter pass 10 is returned.

When it is valid, the CPU 50 uses the write head 22 or 23 to write the variation information such as the entry date and time and the boarding station in a predetermined portion of the magnetic recording unit 11. Writing is performed by a magnetic head having a sufficient output to magnetize the magnetic recording layer 12. At this time, since the coercive force of the magnetic shield layer 13 is extremely small, magnetic recording is not performed on the magnetic shield layer 13. Next, the commuter pass 10 is written by the write heads 24 and 25 on the magnetic recording layer 12 corresponding to the display / recording section 8 with information regarding the date and time of entry and the entry such as the boarding station.

The CPU 50 uses the character generator 64 to convert the entry date and time, the encoding information (character code) for the boarding station and the information indicating the entry into a character pattern. Then, the CPU 50 causes the write head 24 or 2
5, the character latent image is formed on the magnetic recording layer 12 corresponding to the display recording portion 8 of the commuter pass 10.

Next, with the read head 26 or 27, the magnetic recording layer 12 corresponding to the display magnetic recording portion 8 of the commuter pass 10.
The magnetic latent image recorded on is read and supplied to the CPU 50. The CPU 50 checks whether the data recorded on the commuter pass 10 is correct and confirms that the data has been written.

If not correctly recorded, the commuter pass 10 is returned to the writing head 24 or 25, and the magnetic latent image recording of the character pattern is performed again. Since the magnetic recording layer 12 corresponding to the display recording portion 8 is not covered with the magnetic shield layer 13, unlike the reading by the magnetic recording portion 11,
Reading by normal methods is sufficient.

Next, the read heads 28 and 29 read the newly updated information recorded in the magnetic recording layer 12 corresponding to the magnetic recording section 11. The reading here is performed similarly to the magnetic read heads 20 and 21. After confirming that it has been rewritten correctly, the commuter pass 10 will have an outlet 16
Is discharged from the equipment to the user and returned.

Next, the processing of the commuter pass at the time of participation will be described. The commuter passes 10 inserted into the automatic ticket gate are aligned as the aligning means, and the magnetic read means 20, 21 are arranged.
Thus, the encoded information of the magnetic recording unit 11 is read. The valid period and valid section are judged, and if it is not valid, participation is denied.

Information regarding entry is also determined. If there is any doubt about the admission information even after passing the previous decision, the entry will be refused. The commuter pass refused to participate is returned to the user. At this time, the system administrator is notified of the abnormality by an appropriate notifying means (such as sound). The system administrator visualizes the magnetic latent image of the magnetic recording unit 8 of the commuter pass by using a magnetic latent image-visible image conversion member 40 such as a magnetic viewer described later, and presents the user of the commuter pass 10 with information regarding entrance. . Next, the operation of visualizing the magnetic latent image by the magnetic latent image-visible image converting member 40 will be described with reference to FIGS. 8 and 9.

FIG. 8 shows a magnetic latent image-visible image conversion member 4 for visualizing a latent image magnetically recorded on the display recording portion by magnetic recording.
0 schematically shows a cross section of one embodiment of No. 0. 41
Is a magnetically permeable thin plate. Magnetically permeable metal materials such as iron and iron alloys, plastic sheets and the like can be used. Here, a 25 μm thick polyester sheet was used. 42 is a casing, 43 is a cover glass, and 44 is magnetic powder. Magnetic powder 44 is enclosed in an enclosed space formed by the thin plate 41, the casing 42, and the cover glass 43. The closed space side of the thin plate 41 is colored white.

Preprinted surface 1 of the commuter pass 10 discharged outside the ticket gate when it is determined that the entrance information is questionable by the automatic ticket gate
A magnetic latent image-visible image converting member 40 is placed on the 4 side as shown in the figure. In the magnetic recording portion 8 for display, magnetic lines of force are pre-existing at a location where the polarity is reversed, such as NN or SS of the magnetic recording layer 12 corresponding to the magnetic recording portion 8 for display magnetically recorded according to the display information. It passes through the printing layer 14 and acts on the magnetic powder 44 of the magnetic latent image-visible image converting member 40. Due to this action, the magnetic powder gathers at this portion to form dots 46 of the magnetic powder. The dots 46 of magnetic powder are formed corresponding to the character-shaped magnetic latent image. By viewing this from the side of the cover glass 43 of the magnetic latent image-visible image conversion member 40, the user of the commuter ticket can confirm the presence or absence of the magnetic latent image of the display magnetic recording unit 8 or the magnetic latent image. be able to.

On the other hand, encoded magnetic information is also written in the magnetic recording layer 12 corresponding to the magnetic recording section 11. However, in the magnetic recording portion 11, since the corresponding magnetic recording layer 12 is covered with the magnetic shielding layer 13, N−N
Or in the place where the polarity is reversed like S-S,
The magnetic force line 47 from S to N does not go out of the magnetic shield layer 13 because of the high magnetic permeability of the magnetic shield layer 13, and is closed inside the magnetic shield layer 13. Therefore, the formation of the magnetic powder dots according to the magnetic latent image as in the display magnetic recording unit 8 does not occur.

As is apparent from the above, in the magnetic medium according to the present invention, the encoded magnetic information is not visualized even by the magnetic latent image-visible image conversion member 40 such as a magnetic viewer, and the magnetic information for display is displayed. Only visible.

Further, as shown in FIG. 3, a magnetic recording section 11 for recording encoded magnetic information on which a magnetic latent image is formed and a display magnetic recording section 8 for recording a magnetic latent image for a display image are respectively provided. A commuter pass 10 formed on the same surface of the base material 2
Then, across the magnetic recording unit 11 and the display magnetic recording unit 8,
Even if the magnetic latent image-visible image converting means 40 is placed oppositely, only the character magnetic latent image to be displayed on the commuter pass 10 according to the present invention can be visualized. In the description of the above embodiment, the magnetic medium is used as the commuter pass and the medium processing device is applied to the automatic ticket gate device. However, the present invention is not limited to this. In addition, the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made.

[0057]

As described above, the present invention has the following effects as described above.

In the magnetic medium according to the first aspect, the encoded information is recorded in the first magnetic recording layer made of a high coercive force magnetic material and has a coercive force smaller than the coercive force of the first magnetic recording layer. Character information for display that can be visualized by the magnetic latent image visualization means can be recorded as a latent image on the second magnetic recording layer. Moreover, a magnetic shielding layer made of a soft magnetic material is provided on the first magnetic recording layer so that the magnetic lines of force of the encoded information recorded in the first magnetic recording layer are contained so as not to leak outside. Therefore, even in the visible image conversion area by the magnetic viewer, it is possible to visualize only the character magnetic latent image without visualizing the encoded information.

According to another aspect of the magnetic medium processing apparatus of the present invention, the magnetic recording layer is provided with the reading means having the saturation magnetic field generating member for bringing the magnetic shield layer of the magnetic medium into the saturated state. It is possible to read the embedded encoding information. Further, when the encoded information is written in the magnetic recording layer, the writing means may be one having a sufficient output for magnetizing the magnetic recording layer. At this time, the coercive force of the magnetic shielding layer is Since it is extremely small, magnetic recording is not performed on the magnetic shield layer, and recording can be performed only on the magnetic recording layer.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing the configuration of a commuter pass as a magnetic medium that is a first embodiment of the present invention.

FIG. 2 is a diagram showing a layout of a display recording area of the commuter pass shown in FIG.

FIG. 3 is a schematic cross-sectional view showing the configuration of a commuter pass as a magnetic medium that is a second embodiment of the present invention.

FIG. 4 is a diagram showing a layout of a display recording area of the commuter pass shown in FIG.

FIG. 5 is a cross-sectional view showing an internal configuration of an automatic ticket gate that processes the layered commuter pass shown in FIG.

FIG. 6 is an explanatory diagram of a configuration of a reading head which is a main part.

7 is a block diagram showing a control system of the apparatus shown in FIG.

FIG. 8 is a schematic cross-sectional view of a magnetic latent image-visible image conversion member that visualizes the magnetic latent image on the display recording unit of the commuter pass.

9 is an explanatory view showing the principle of magnetic latent image display by the magnetic latent image-visible image converting member shown in FIG.

[Explanation of symbols]

1, 10 ... Commuter pass as magnetic medium, 3 ... First magnetic recording layer, 4 ... Magnetic shielding layer, 5 ... Second magnetic recording layer, 6 ... Printing layer, 7 ... Fixed information printing section, 8 ... Display Recording unit, 11 ... Magnetic recording unit for recording encoded information, 12 ... Magnetic recording layer,
13 ... Magnetic shielding layer, 14 ... Pre-printing surface, 17 ... Medium transport path, 20, 21 ... Read head (first reading means), 2
2, 23 ... Writing head (first writing means), 24, 25
... write head (second write means), 26, 27 ... read head (second read means), 28, 29 ... read head (third read means), 40 ... magnetic latent image-visible image Conversion member, 4
6 ... Dots of magnetic powder, 47 ... Shielded magnetic field lines, 70 ...
First head (saturation magnetism generating member), 72 ... Second head (reading member).

Continuation of front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical display location G07B 11/02 8111-3E G11B 5/80 7303-5D 23/34 A 7201-5D 23/40 Z 7201-5D

Claims (2)

[Claims] 1. A first magnetic recording layer made of a high coercive force magnetic material for recording encoded information, and having a coercive force smaller than the coercive force of the first magnetic recording layer and visualized by a magnetic latent image visualization means. A second magnetic recording layer for recording possible display character information as a latent image, and magnetic field lines of the encoded information recorded on the first magnetic recording layer provided on the first magnetic recording layer are externally provided. A magnetic shielding layer made of a soft magnetic material that can be contained so as not to leak,
A magnetic medium comprising: 2. A first magnetic recording layer made of a high coercive force magnetic material for recording encoded information, and having a coercive force smaller than the coercive force of the first magnetic recording layer and visualized by a magnetic latent image visualization means. A second magnetic recording layer for recording possible display character information as a latent image, and magnetic field lines of the encoded information recorded on the first magnetic recording layer provided on the first magnetic recording layer to the outside. A magnetic medium processing apparatus for writing and reading information to and from the first and second magnetic recording layers, for a magnetic medium comprising a magnetic shielding layer made of a soft magnetic material that is contained so as not to leak. A magnetic recording medium is provided on the first magnetic recording layer, which includes a medium conveying path for conveying the magnetic medium, and a saturation magnetism generating member for bringing the magnetic shield layer of the magnetic medium conveyed through the medium conveying path into a saturated state. Enko A first reading means for reading the read information; a first writing means for writing the updated encoded information in the first magnetic recording layer of the magnetic medium conveyed through the medium conveying path; and the medium conveying path. Second writing means for writing character information for display as a latent image on the second magnetic recording layer of the magnetic medium that is conveyed, and the second magnetic recording by the second writing means. Second reading to confirm the textual information for display written on the layer
And a saturation magnetic field generating member for bringing the magnetic shield layer of the magnetic medium into a saturated state, by the first writing means.
And a third reading unit for reading the updated encoded information written in the magnetic recording layer to confirm the updated encoded information.