JPS621570A - Printing apparatus - Google Patents

Abstract

PURPOSE:To make it possible to record a dot having a normal shape on transfer paper which is extremely inferior in surface smoothness or a film not high in the compatibility with ink, in a printing apparatus for transferring an ink recording part to a transfer medium by magnetic attraction force, by preventing the contact of ink with the transfer medium at a non-recording part. CONSTITUTION:A printing apparatus has a heat energy applying means 11 for applying heat energy to a recording part 13 of thermoplastic magnetic ink and a magnetic attracting force generation means 15 for generating magnetic attraction force in the ink and transfers the ink recording part to a transfer medium 14 by magnetic attraction force under the control of the application of heat energy. The ink is not contacted with the transfer medium 14 at an ink non-recording part 12. The transfer of the ink is performed by a method wherein the ink is melted at a transfer part by heat energy and the ink recording part is deformed or flown by magnetic attraction force in an ink activated state due to heat. Therefore, even a high density recording dot having an especially small area can be recorded on a transfer medium inferior in surface smoothness such as rough paper in a normal shape with good transfer efficiency.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a non-impact printing device, and more specifically, to a non-impact printing device that transfers a thermoplastic magnetic ink onto a transfer medium by the action of heat and magnetism. , relates to a printing device that obtains characters and images.

[Conventional technology]

As a compact, low-cost, non-impact printing method, many methods using magnetic ink have been proposed.

For example, the method described in Japanese Patent Application Laid-Open No. 52-96541 is ? u
In the M thermal transfer method, magnetic ink is used as the ink, and a magnetic means provided separately from the heat supply means applies a magnetic attraction force to the ink corresponding to the thermal image to cause the transfer. That is, as shown in FIG.
1 - Ink medium 302 - Transfer paper 305 - Installed on the neck of magnet 306, and the thermo-pressure magnetic ink 304 of the ink medium is covered when thermal printing is applied from the surface of base film 303 by a thermal head (directly below the head/door). contact with transfer paper,
After the molten ink is adhered to the transfer target, the ink medium is pulled from the transfer target paper, and the ink is transferred. Furthermore, the magnetic attraction force increases the probability of contact of molten ink with the transfer paper, and the effect of increasing the transfer rate to paper when the ink medium is removed, which reduces surface smoothness. It was invented to allow high-quality printing of text and images even on rough paper.

[Problem that invention m attempts to solve]

However, in the above-mentioned conventional technology, when removing the ink medium using II, the ink in the recording area that should be completely transferred is in contact with the base film and the ink in the non-recording area.
Once melted, the ink in the recording section that is in contact with the transfer paper is peeled off from the transfer paper together with the base film, which is said to be the cause of transfer failure. In Fig. 31, in general thermal transfer recording, there are FA (ink-to-transfer paper adhesion force) and FB (ink cohesive force), which are the forces that promote the transfer of recording part ink to the transfer paper, and 5. Forces that impede transfer. , FCC ink base film adhesion force) and FD (recorded part inter non-recorded part ink cohesive force)
, FA >> FC and FD always hold true, the transfer is completed completely.

In the figure, 41 is the base film, 42 is the recording part ink,
43 is non-recording ink, and 44 is transfer paper.

Furthermore, in the above-mentioned conventional technology, when the ink melts, the ink in the recording section is attracted toward the transfer paper by the magnetic attraction force, so the probability of contact with the transfer paper increases.
Increasing FA in the figure had the effect of increasing the transfer efficiency to some extent. However, 81 remains the same, and when the ink medium is peeled off, the base film and the inter transfer paper are still adhered to each other, so in Fig. 4, Fc and
FD exists. Therefore, especially when transferring to paper with very poor surface smoothness, FA<FC or FA
<FD case occurs, which has the problem of causing transfer failure.

Also, if printed using the conventional method, as shown in Figure 32,
If the surface condition of the transfer medium is rough, the recording mode
When printing 321, a portion (a valley portion 324 in the figure) that does not come into contact with the transfer medium 322 and the magnetic ink layer 323 is formed, so that a recording dot with a normal shape cannot be obtained. In particular, when the transfer medium is paper such as rough vapor with very poor surface smoothness (Beck smoothness of 1 to 2 seconds) as shown in Fig. 33, even if the strong magnetic attraction of the prior art described above is used, The magnetic ink adhered only to the vicinity of convex portions 331 such as the tips of the UK fibers on the surface, resulting in recording dots 332 (as shown in FIG. 33), which did not have a normal shape.

Further, the same phenomenon was particularly noticeable when the second recording dots became denser, and recording dots with a small area could not have a normal shape.

Furthermore, in the conventional method, as shown in FIG. 30, since the plastic magnetic ink 34 and the transfer paper 305 are in contact with each other, most of the heat generated in the thermal head 301 passes through the plastic magnetic ink 304 and transfers to the paper 305. He had run away to paper 305. For this reason, there is a problem that during transfer, a large amount of heat is lost as heat loss without thermally melting the plastic magnetic ink 304. (This phenomenon will be referred to as heat loss hereinafter.) Furthermore, in the conventional method, as shown in FIG. 30, the magnetic ink 304
Since the transfer paper 305 is in contact with the grippable magnetic ink 304 and the transfer target fffi 305, friction, heat conduction, etc. occur between the grippable magnetic ink 304 and the transfer target fffi 305. For this reason, there is a problem in that the plastic magnetic ink 304 is recorded on the non-recording portion of the transfer paper by a method other than the normal recording means (thermal recording) (hereinafter referred to as character smearing).

Therefore, the present invention aims to solve these problems.
The purpose is to provide a device that can satisfy at least one of the following four items.

1. Normally shaped dots can be recorded on transfer paper with very poor surface smoothness or on film that does not have very high affinity with ink.

2. Can prevent character stains.

3. Reduce heat loss during printing energy.

4. Normally shaped dots can be printed even if the density of recording dots is increased.

[Means for solving problems]

As shown in FIG. 1, the printing device of the present invention includes means 1 for applying thermal energy to a recording portion 13 of thermoplastic magnetic ink.
1, and a means 15 for generating a magnetic attraction force to the ink, and the recording portion of the ink is transferred to the transfer medium 14 by the magnetic attraction force by controlling the application of thermal energy, and the ink is It is characterized in that the transfer medium does not come into contact with the non-recorded portion 12 of the ink (Fll is a magnetic attraction vector).

[Function] According to the above structure of the present invention, the heat-degradable magnetic ink and the transfer medium do not contact each other in the non-recording portion of the ink. The ink is melted by energy, and when the ink is activated by heat, the ink marks are deformed by the magnetic attraction force.
Or it can be done in flight. That is, the imprinting on the receiving medium is completed almost simultaneously with the application of thermal energy to the ink, and the process of peeling off the ink medium of the prior art is unnecessary. That is, in FIG. 31, when the ink medium is peeled off, the FC, which hinders the transfer,
Since FD is absent, transcription is complete.

In addition, the ink recording area deforms or flies regardless of the shape of the transfer medium, and the ink transfer is performed without contact between the ink medium and the transfer medium, so the surface smoothness is not as smooth as that of rough paper. The transfer efficiency is high, and recording dots with a normal shape can be produced even on a transfer medium with poor surface area or high-density recording dots with a particularly small area.

Furthermore, since the ink medium and the transfer medium are not in contact, there is no contact between the non-recorded area of the ink and the transfer medium, and no smudges occur. There is no heat loss due to heat conduction from the ink medium to the transfer medium. Note that as a means for applying thermal energy to the printing device, there is a general thermal atto. Further, it is preferable to provide the thermoplastic magnetic ink in a uniform layer on the surface of the base film of heat-resistant nebula.Means for generating magnetic attraction include tacite, 7 permanent magnets, and the like.

Further, as a method of applying energy, the energy applied per transfer of one recording dot may be time-divided into two or more times and applied to the ink.

Further, a thermal bias may be applied to the transfer medium and/or the transfer medium before and/or after printing, or both before and after printing.

In addition, after applying thermal energy using a heat roller,
The recording dots on the transfer medium may be hot rolled.

In addition, for an ink medium that can be used in the above-mentioned printing device, etc., it is recommended to provide unevenness on the surface of the magnetic ink layer.The average pip of the unevenness is 7 dots to the thermal head when a thermal head is used as a means for applying thermal energy. (For example, when the pitch of the thermal electrode electrode is 8 lines/mm, the unevenness is within about 150I1m).

Further, an overcoat layer may be provided on the thermoplastic magnetic ink layer, or an undercoat layer may be provided between the support layer and the thermoplastic magnetic ink layer.

In addition, the means for generating magnetic attraction force is to create a closed magnetic path using a magnetic material, and use leakage magnetic flux (or magnetic field, magnetism) to
It is also possible to use a magnetic attraction force to absorb the thermodegradable magnetic ink. In this case, it is preferable to obtain magnetic attraction by discontinuing a part of the magnetic material in the form of a magnetic closed circuit. A strong magnetic attraction force can be obtained by discontinuing a part of the magnetic material (closed circuit shape) that makes up the magnetic closed circuit and using the leakage magnetism of that part. A stronger magnetic attraction force can be obtained by utilizing the leakage magnetic flux at the edge.

For magnetic attraction! Example using a magnet [Example 1
] Diagrams of the printing method in this example are shown in Figure 2 (a) and (C).
), 21 is a thermal head, 22 is an ink medium,
23 is a transfer paper, 24 is a magnet or a permanent magnet, 25 is a support layer for an ink medium, and 26 is a magnetic ink.As shown in FIG. Transfer paper can be installed without contact. Furthermore, as shown in FIG. 2(b), it is desirable that the longitudinal direction of the attraction section of the electromagnet head or permanent magnet be longer than the length of the thermal element array of the thermal head, that is, the length of the printing section. This is to apply magnetic attraction force uniformly to the recording area of the magnetic ink.

2(b)-1 to (b)-4 show the recording mechanism, 25 is the support layer, 26 is the magnetic ink, 23 is the transfer paper, 24 is the t-magnetic head, and 21 is the 7-d drive to the thermal. be.

The shaded area of the magnetic ink is the area that has been completely heated by the thermal head according to the image iFK number. (b)-1 shows the heat application process, (b)-2 shows the suction deformation process, (b)-3 shows the flying process, and (b)-4 shows the transfer completion process. According to observation, (b)-1→(
b)-2-(b)-4 and (b)-1-(b)-3-(
There were two possible processes (b)-4, but both were excellent in terms of printing quality. In other words, as seen in printing with the conventional contact type (Fig. 30),
No transfer defects occurred, and the shape of the printed dot was circular or oval, with excellent reproducibility. This is largely due to the fact that the magnetic ink and the transfer paper in the present invention are not in contact with each other.

The main cross-sectional view of the t-magnet head in this example is shown in
Shown in a), (e), (''), and (g).

The core (29) has a narrowed tip (29') -cb
Ru. The material of the core is a high permeability material, namely F6
, Fe-Si, Fe-Ni, Mu-Zu ferrite, N1-Zu ferrite, etc. are suitable. Further, it is more effective to use a high saturation magnetic flux density material such as Fe-Co for the tip of the core.

Figure 3(a) shows the field distribution at the tip of the tg1 stone hairhead,
Figure 3 (b) shows the attenuation curve of the magnetic field strength in the X direction in Figure 3 (Ten).
and Hi (i=1.2.3) correspond to each other.

Reference numeral 31 in FIG. 3(a) indicates magnetic ink in the recording section, which is completely attracted in the direction of the head 32 by the magnetic attraction force (F2).

The magnetic attraction force F can be expressed as F=Mo2H/2X. Here, M is the magnetization strength of the ink, 2H/2X
indicates the magnetic field gradient in the X direction. Therefore, as shown in FIG. 3(b), the magnetic attraction force increases in the order of F3<F2<Fl. Added magnetic ink recording section! ! ! One awn,
Due to its fluidity, as shown in Figure 2(b)-2 or Figure 2(b)-3, in order to deform or fly and transfer to paper, the magnetic attraction force must exceed the threshold. It is necessary to overcome it. In addition, the threshold value is the strength of the magnetic ink,
As a result of the study in this example, the desirable shape of the magnet hem is B in FIG. 2, that is, the gap at the tip is 1000 μm or less, preferably 500 μm or less, And A in FIG. 2,
That is! The distance between the magnet and the ink is 1,00
It was concluded that it is 0 μm or less, preferably 500 μm or less. Furthermore, the electromotive force N1 of the t magnet (N is the number of turns, ■ is tf
i) +1500 or more, preferably 1.000 or more.

Furthermore, as shown in Fig. 2 Cr) and (g), if an auxiliary magnetic pole 27 is provided on the opposite side of the electromagnetic head of the magnetic ink, it is possible to increase the magnetic field gradient at the position of the recording section ink 28. It is effective in increasing the magnetic attraction force. As the material for the auxiliary magnetic pole, the above-mentioned high magnetic permeability materials and high saturation magnetic flux density materials are suitable.

Example (1-1) As a magnetic attraction means, it is shown in FIG. 2(d)! A magnet was used. Permendur (Co50) was used for the core, and the energizing force Nl was 3000. The gap (B) at the tip was 400ttm.

As a heat application means, a thin film thermometer with a resolution of 180 DPI was used.

The ink medium used was a 4 μm thick PET (polyethylene terephthalate) film coated with a magnetic ink having the composition shown below using a hot melt method so that the ink thickness was 6 μm.

[Composition 1 Magnetite fine particles 40wt%2 Carnauba wax 20wt%3 Paraffin 7.7 wax 30wt%<EVA
5wt%5 Dispersant 1wt%6
Dye 4wt% and melting point is 70℃
±5°C. The configuration diagram of the printing method according to this example is shown in Fig. 2 (凰), where 21 is a thermal plate, 22 is an ink medium, and 23 is a transfer paper (Beck smoothness is 2 seconds). , 24 is tm stone hemet. Ink medium is PET film 25, magnetic ink 2
It is composed of 6 awns.

Ink transfer was performed using the above elements and configuration.

Table 1 shows the printing conditions and transfer efficiency evaluation results at this time.
The circuit diagram at this time is shown in FIG.

The pulse generator 41 generates a pulse, the inverter (negative logic) inverts the pulse, connects it to the base of the transistor 43, and applies the applied energy per dot to the thermal head heating resistor 44 as shown in Table 1. did.

The evaluation result of the transfer efficiency was expressed as a percentage of the amount of ink transferred to the transfer paper with respect to the amount of ink (ink thickness of M element area) of the thermal element 7 - integral of the thermal head.

Example (1-2) Ink transfer was performed using the same elements and configuration as Example (1-1), but changing the printing conditions as shown in Table 1.

Example (1-3) In Example (1-1),! N■ of the magnetic head, 5
000, and ink transfer was performed under different printing conditions as shown in Table 1.

Example (1-4) In Example (1-t), the tip gap (B) of the t8i stone head was set to 300 μm, and ink transfer was performed under the same conditions as shown in Table 1.

Comparative Example (1-1) Using the same elements as in Example 1) (1-1),
), when the magnetic ink and transfer paper are applied with thermal energy, that is, directly below the thermal head,
They were placed so that they were in contact with each other, and ink transfer was performed under the same conditions as in Example 1).

Comparative Example (1-2) In the same configuration as Comparative Example 1), ink transfer was performed under the same printing conditions as in Example 2).

Example of using a permanent magnet as the magnetic attraction means [Example 2]
] Main cross-sectional views of the permanent magnet head in this example are shown in FIGS. 5(b) and 5(c).

27 is a permanent magnet, preferably a magnet with a large maximum energy product, such as an Arnif magnet, a Ba-ferrite magnet, a rare earth magnet, and the maximum energy product (hereinafter abbreviated as (BH) max) is 10 MGOe or more. Preferably.

The yokes 59 and 59° have a tapered tip portion 59°. The material of the yoke is a high permeability material, i.e. F
e, Fe-31, Fe-Ni, Mu-Zu ferrite,
N1-Zu ferrite etc. are suitable. Furthermore, at the tip of the core,
It is even more effective to use a high saturation magnetic flux density material such as Fe-Co.

The gap at the tip (B in the figure) is 100 μm to 10
00 μm is desirable.

The magnetic ink 58 to be attracted needs to float to a position where the magnetic field gradient due to leakage of magnetic flux from the tip of the permanent magnet head is large.

In other words, the distance between the permanent magnet and the magnetic ink (A)
is preferably 1000 μm or less.

In the permanent magnet head shown in FIG. 5(b), magnetic ink is attracted in a direction transverse to the magnetic flux, and as shown in FIG. 5(c).
In the permanent magnet shown in y, the magnetic flux can be completely attracted in the same direction as the magnetic flux.

Actual Example N (2-1) A permanent magnet head shown in FIG. 5(b) was used as the magnetic attraction means. The yoke is permendur (Co 50
), and the permanent magnet is (BH)max=20 Sa
A 1 m magnet was used. The gap at the tip (B) is 200μ
It was set as m.

A thin film thermal head with a resolution of 180 DPI was used as a heat application means.

The same ink medium as in Example (1) was used.

A block diagram of the printing method according to this embodiment is shown in FIG. 5(a), where 51 is a thermal head, 52 is an ink medium, 53 is a transfer paper (Beck smoothness is 2 seconds), and 54 is a permanent magnet head. be. The ink medium is composed of a PET film 55 and magnetic ink 56.

Ink transfer was performed using the above elements and configuration.

The circuit and printing at this time were carried out at +1 in FIG. 4 in the same manner as in Example 1. Table 2 shows the printing conditions at this time and the evaluation results of transfer efficiency.

The evaluation result of the transfer efficiency was expressed as a percentage of the amount of ink transferred to the transfer paper with respect to the amount of ink (thermal element area x ink thickness) corresponding to the area of the thermal element of the thermal head.

Example (2-2) Ink transfer was performed with the same elements and configuration as Example (2-1) but with different printing conditions.

Example (2-3) In Example (2-1), (BH) of the permanent magnet head
Ink transfer was performed using an ink with a maximum value of 30 and changing the printing conditions.

Example (2-4) In Example (2-1), the gear knob (B) at the tip of the tar stone head was set to 150 μm, and ink transfer was performed under the same conditions.

Comparative Example (2-1) Using the same elements as in Example (2-1), in the configuration shown in Figure 4-b), the magnetic ink and transfer paper were placed directly under the thermal beam when thermal energy was applied. The ink was transferred under the same conditions as in Example 1).

Comparative Example (2-2) In the same configuration as Comparative Example (2-1), Example (2-2)
Ink transfer was performed under the same printing conditions as in 2).

Example of Pulse Division Example (3-1) The temperature change of the ink in Example 1 is recorded in Figure 6. According to this, 0.1 m5 after applying the applied pulse.
After EC, the temperature begins to rise and reaches 70℃, which is the melting point of the ink.
It is reached after 0.4 m1ee. Also 0, 7
Around mIec, the temperature reaches around 200°C.

Since printing is only possible when the ink has a temperature above its melting point, that is, when the ink melts, the effective printing time is 0.3 m5ec when the temperature is 70°C or above.

The circuit shown in FIG. 7(1) was created to lengthen the effective printing time.

Pulse generated! ! A pulse is generated at t7t, and the pulse generated by the pulse generator 72 is inverted by the inverter 73 and combined with the NAND 74, and the transistor 75
By flowing to the base of the thermal head heat generating part 76,
A voltage was applied as shown in Figure (b).

At this time, temperature changes as shown in FIG. 7(e) were recorded.

(However, other conditions were not changed at all.) According to this, the effective printing time is 0.8 ms ec. When printing was performed with this applied pulse, the printing quality was even higher than that obtained in Example 1. A density print was obtained.

There are other methods, such as simply increasing the application time without dividing the applied pulse or simply increasing the applied voltage. ), when the applied voltage is increased, Figure 8 (
As shown in b), the effective printing time increases in both cases, but 2
The parts where the temperature exceeds 00°C will be damaged.

When the ink temperature exceeds 200°C, the PET that is the support layer becomes 300°C or higher, which causes it to soften and melt, changing its shape, and in the worst case, causing thermal damage such as the ink film being cut.

In addition, the magnetite particles in the ink become less magnetized as the temperature rises, and the magnetic attraction force weakens when the temperature exceeds 200°C. The method of simply increasing the number is inappropriate for printing. In order to increase the effective printing time from now on, it is desirable to apply pulses in divided parts.

Example (3-2) The pulses performed in Example (3-1) were applied by reducing the printing energy as much as possible, and at the same time keeping the ink at 200° above its melting point.
Printing was performed using the circuit shown in FIG. 9 (λ), which was reset so that the time during which the temperature remained below C was longer.

The pulses generated by the pulse generator 91, the pulses from the pulse generator 92 are inverted by the inverter 93, the pulses from the pulse generator 94 are inverted by the inverter 95, and the pulses from the pulse generator 96 are inverted by the inverter 93. The inverted circuit 97 is combined with the NANp circuit 98, and the current flows to the base of the transistor 99 to generate heat from the thermal head 8'.
11100, a voltage was applied as shown in FIG. 9(b).

The temperature change of the ink at this time was recorded as shown in FIG. 9(c), and the effective printing time was 0.8 m5ec. The applied voltage at this time is 5.0[Vl X (0,5+O,1X3)[5sa
e] -0.8 [my]. When printing was performed using this applied pulse, printing of much higher quality than in Example 1 was obtained.

It is sufficient that printing can be performed using divisional pulse settings other than these [Embodiments (3-1) and (3-2)].

Furthermore, if the melting point of the ink or the resistance value of the heating element of the thermal head changes, the settings of the applied voltage and divided pulses may be changed.

The same effect can also be obtained by replacing the permanent magnet with an xi stone.

Example of Pulse Bias Example (4-1) The temperature change of the ink in Example 1 is recorded in Figure 6. According to this, 0.1 m5 after applying the applied pulse.
After ee, the temperature of the ink begins to rise and reaches the ink's melting point of 70°C after 0°4m5ec. 0 again
, the temperature reached nearly 200℃ near 7m5ec.

Printing is only possible when the ink reaches a temperature above the melting point, that is, when the ink melts, so the effective time for actual printing is 0.3 at temperatures above 70°C.
It becomes m sec.

(This time will hereinafter be referred to as the effective printing time.) The circuit shown in FIG. 10 (λ) was created so as to increase the actual effective printing time.

The pulse generated by the pulse generator 101 is amplified by the transistor 102 to an applied voltage 103, and the pulse generated by the pulse generator 104 is also amplified to V2 by the transistor 105.
It can be amplified to 106. These two pulses are applied to the two transistors 107 and 108 of the same class, and the two pulses form a differential input, and the first
A voltage is applied as shown in FIG. 0(b).

When printing was carried out under these conditions, a record of temperature changes as shown in FIG. 10(c) was obtained. This is done by applying a low voltage before the applied pulse to bring the ink closer to its melting point.
By heating it to ℃, the effective printing time when applying pulses is extended.
Printing effective time of 5ec applied pulse is 0.6m5ec
When printing was performed with these settings, a higher density and higher quality print than in Example 1 was obtained.

Example (4-2) The low voltage application applied in Example (4-1) was applied to Section 11 (a).
This time, when the pulse was applied after the application pulse, a temperature change as shown in FIG. 11(b) was recorded. The effective printing time was O, tisec, the same as in Example 2, and when printing was performed with this setting, printing with the same density and quality as in Example 2 was obtained.

Example (4-3) In a combination of Examples (4-1) and (4-2), low voltage was applied before and after the applied pulse as shown in Figure 12(a). Temperature changes as shown in (b) were recorded, and the effective printing time was 0.65 m@eC, resulting in higher density and higher quality printing than in Example 2.3.

As long as printing can be obtained with settings other than these embodiments, pressure may be applied to the thermal membrane with any voltage and pulse width before and after the application pulse.

Example of thermal bias Example (5-1) Example of using thermal bias as a transfer assisting means.

FIG. 13(,) does not show a schematic diagram of an embodiment of the present invention, in which a Cyful head was used as the PA energy applying means, a permanent magnet was used as the magnetic attraction generating means, and a dryer heater 138 was used as the preheating means.

As shown in FIG. 13(a), during non-recording, the ink medium and the transfer paper were not brought into contact with each other, and the distance was maintained at 120 μm directly below the head. The same ink medium as in Example 1 was used.

The permanent magnet is Sam with a maximum energy product of 25.3 MGOe.
An i-stone was used, and permendur, which is an Fe-Co alloy, was attached to the tip. Dryer heater (600W)
After preheating the film until the ink film surface temperature reached 40°C (the film surface temperature was measured up to the non-contact radiation temperature), and before it quickly cooled down, I applied it with a thermal head with a resolution of 200 DPI, and the thermal
When applied with a 0 DPI thermal head, the thermal head (applied energy 0, 5 mJ/d or
80% or more of the ink surface area of the heat generating element (125 μm x 0 μm) was transferred to the transfer paper (transfer efficiency of 80% or more), resulting in high quality printing.

(Hereinafter, transfer efficiency shall refer to the above meaning.) Example (5-2) Same printing bag as Example (5-1)! (a system that combines the same permanent magnet and thermal head), the same ink composition (and the same transfer paper), and the preheating means shown in Figure 13 (
A halogen lamp 139 (700W) was used as in b). After preheating the film until it reaches 40°C, which is the same as the ink film surface temperature, applying it with a thermal head (0
, 5 mJ/dat) was transferred to the receiving paper with a transfer efficiency of 90% or more, and very high quality printing was achieved.

Example (5-3) Using the same printing device and the same ink composition as Example (5-1), both the ink film and the transfer paper were irradiated with a halogen lamp 139 under thermal bias as in No. 1350. Preheated.

The irradiation surface temperature was 40 for both the ink film and the transfer paper.
It was set to °C. When applied with a thermal head after preheating (0,
5 mJ/dat) transfer efficiency was 90% or more to the receiving paper, and as in Example (5-3), very high quality printing was achieved.

Furthermore, the fixation of the ink to the transfer paper was very good.

Example (5-4) Using the same printing device and the same ink composition as in Example (5-1) and using a dryer heater 138 that is a thermal bias, both the ink film and the transfer paper were printed as shown in Figure 13-(d). The ink film and transfer paper were preheated until the irradiated surface temperature reached 50°C. When applied with a thermal head after preheating (0
, 5 m J/dat) Transfer efficiency: J7L transferred to the transfer paper at 9S% or higher, and high quality printing was achieved.

Example (5-5) Using the same printing device and the same ink composition as Example (5-1), as shown in Figure 13 (e), as a thermal bias means,
After the dryer heater 138 has been transferred by the thermal head, the ink dots on the transfer paper are irradiated with light until the surface temperature reaches 40 degrees Celsius before it cools down, so that the ink dots are completely fixed on the transfer paper and the dot area is Melt ξ with heat and cut into pieces. The transfer efficiency was 80% or more on the transfer paper, and high quality printing was possible.

Example (5-6) Using the same printing device and the same ink composition as Example (S-1), as shown in FIG. After the transfer, the ink dots on the transfer paper are irradiated until the surface temperature reaches 50°C before they cool down to completely fix the ink dots on the transfer paper and expand their area. It was 85% or more, and high quality printing was possible.

The results of Examples (5-1) to (5-6) are summarized as above.

Comparative Example (5-1) As shown in Figure 4, when the thermo-pressure magnetic ink of the ink medium is applied with heat from the base film surface by the thermal head, it is brought into contact with the transfer paper and the melted ink is transferred to the transfer paper. When the ink medium was peeled off from the transfer paper and the ink was transferred, the transfer efficiency was only 40%, resulting in extremely poor printing quality.

Example of Heat Roller Example (6-1) Figure 14 shows the device t used in Example 1 (Figure 2 (λ)
) and a heat roller (surface material made of silicone resin) is added to the printing device of this embodiment.

The temperature of the heat roller is around the melting point of the ink, 55°C to 60°C.
, using a magnetic film with the same ink composition, and applying 0.45 mJ/d to the thermal head.

A dot is recorded on the transfer paper by applying energy of t, and before the recorded dot cools down, a pressure of 1 is applied with a heat roller.
When rolled at 00 g/am, dots were recorded on the transfer paper with a transfer efficiency of 90% or more, resulting in very high quality printing.

FIG. 15 shows the details. First, the ink dots 15 are transferred to the transfer paper 145 by thermal printing.
0 is made of silicone resin as a surface material, and is rolled with a heat roller 148 equipped with a halogen lamp 149 (500W) as a heat mark inside. The increase in the transfer area results in a line transfer object 141.

The following embodiments are based on the method shown in FIG. 15.

Example (6-2) The same application device and the same heat roller as in Example (6-1) were applied to the same transfer paper, the temperature of the heat roller was maintained at 55 to 60°C near the melting point of the ink, and the same ink composition was used. Using a magnetic ink film of % or more, it was possible to transfer onto the receiving paper and produce high-quality prints.

Example (6-3) The same heat roller was applied to the same transfer paper using the same application device as in Example (6-2), the temperature of the heat roller was maintained at 55 to 60 °C near the melting point of the ink, and the same ink composition was used. Using a magnetic ink film of The image was transferred onto the transfer paper in the above manner.

Example (6-4) The same heat roller was applied to the same transfer paper using the same application device as in Example (6-1), and the temperature of the heat roller was set to 45 to 45.
The temperature was maintained at 50°C, a magnetic ink film with the same ink composition was used, and the applied energy of the thermal head was 0.45 mJ.
/dot, and before the ink cools down, apply a pressure of 120g/a to the ink dots on the transfer paper using a heat roller.
When rolled at a speed of 1.5 m'', the transfer efficiency was 90% or more and the transfer was transferred onto the receiving paper, resulting in very high quality printing.

Example (6-5) The same application device, same transfer paper, and heat roller as in Example (6-1) were used, and the temperature of the heat roller was set to 40 to 4.
The temperature was maintained at 5°C, a magnetic ink film with the same ink composition was used, and the applied zero energy of the thermal head was 0.45 m.
After applying the ink at J/dat and before the ink cools down, the ink dots on the transfer paper are applied with a heat roller at a pressure of 120
/cm', the transfer efficiency was 85% or more and the transfer was transferred onto the receiving paper, resulting in high quality printing.

Comparative Example (6-1) As shown in Figure 3, thermoplastic magnetic ink as an ink medium was
When the thermal head applies heat from the surface of the paper, the ink medium is brought into contact with the transfer paper and the molten ink is adhered and transferred to the transfer paper, and then the ink medium is peeled off from the transfer paper and the ink is transferred. The efficiency was only 40%, resulting in very poor printing quality.

Example in which the surface of the ink medium is made uneven [Example 7] Main cross-sectional views of the ink medium in this example are shown in Fig. 16(a), Fig. 16(b), and Fig. 16(c). The support yf1161 shown in the figure is preferably a heat-resistant film such as polyethylene terephthalate (PET), polyide, polyacidoid, polyether ether ketone, polysulfone, polyether sulfone, etc. The thickness of the support layer is preferably 1 μm to 10 μm.

The binder of the magnetic ink 162 mainly contains wax and polymer. Thermal temperature is 50℃~250℃
The ingredients include paraffin wax, microcrystalline wax, carnapawa 77x, α-olefin/maleic anhydride copolymer, oxidized wax, polyethylene 77x, fatty acid amide, fatty acid ester, edelene-vinyl acetate copolymer, Thermoplastic materials such as ethylene-ethyl acrylate and distearyl ketone are preferred.

The ferromagnetic material contained in the thermodegradable magnetic ink is magnetic fine particles of metals or alloys such as magnetite, Mu-Zu ferrite, N1-Zu ferrite, garnets, Fe, CO%N+, etc., and the particle size is , 10 people to 1
0,000 people, preferably 500 to s, ooo people. The coating amount of magnetic ink thickness is 5 to 30 m”/m” (
7m” is desirable.

In addition, the average pitch (A) of the unevenness is determined by the arrangement of the thermal elements.
It needs to be about the same length as D or shorter. That is, when used in a printing method that requires high resolution, the thickness is preferably 5 μm to 150 μm.

In addition, it is better to increase the uneven i% awn for a certain amount of coating in order to increase the surface area, but it is necessary to keep it to a level that does not reduce the heat conduction efficiency from the support layer. , 1 μm to 20 μm.

Example (7-1) The structure of the ink medium according to this example is shown in FIG. 16-1). A PET film with a thickness of 4 μm was used as the support layer. The thickness of the magnetic ink was determined by applying an ink having the composition shown below using a gravure hot melt method so that the coating amount was 15 (/m').

[Magnetic ink composition]

1. Magnetite (particle size 0.2 μm > 50
wtX2, α-olefin/anhydrous maleic #10ga α copolymer 3, paraffin wax 30wα4, ethylene-ethyl acrylate 5ga α copolymer 5, dye
The uneven shape of the 5vtX surface had an average pitch of 50 μm and an average height of 5 μm.

Ink transfer was performed using the above ink medium. A block diagram of the printing method is shown in FIG.

171 is for thermal (resolution 180DP■), 17
2 is the ink medium of this example, 175 is a PET film, and 176 is magnetic ink.

173 is the transfer paper (Beck smoothness 1 second), 174 is the magnetic attraction means! It is a magnetic head.

The ink transfer conditions were 0.7 mJ/dot, and the magnetomotive force Nl of the electromagnet was 3. QOO.

The transfer efficiency was evaluated by expressing the amount of ink transferred to the transfer paper as a percentage of the amount of ink for the area of the thermal element (thermal element area x ink thickness). The results are shown in Table 4.

Example (7-2:> The structure of the ink medium according to this example is as shown in No. 16150 (b).
). The same support layer and magnetic ink as in Example (7-1) were used.

Regarding the uneven shape of the surface, the average pinch of the unevenness was 60 μm and the average height of the unevenness was 20 μm.

The ink transfer method and conditions were the same as in Example (7-1).

Example (7-3) The structure of the ink medium according to this example is shown in FIG. 16(c). The support layer and magnetic ink were prepared according to Example (7).
-1) was used.

The magnetic ink layer was coated by a gravure-offset hot melt method and then pressed with a photo roll having an uneven surface to form an uneven surface.

The average pinch of the surface unevenness was 30t1m, and the average height of the unevenness was 10 μm.

The transfer method and conditions were the same as in Example (7-1).

[Comparative example]

The structure of the ink medium in this comparative example is shown in FIG. The support layer and magnetic ink were prepared in Example (7-1).
).

The magnetic ink layer was formed by a gravure-offset hot melt method. In other words, the average height of the surface irregularities is zero,
Footed to make it smooth.

The transfer method and conditions were the same as in Example (7-1).

Example of Overcoat [Example 8] The structure of the thermoplastic magnetic ink medium of this example will be explained with reference to FIG. 19.

191 is a support layer, 192 is a thermoplastic magnetic ink layer, 1
93 is an overfoot layer.

It is desirable that the support has heat resistance, mechanical strength, and high smoothness.Materials include resin films such as polyethylene, polypropylene, polystyrene, polyimide, polyethersulfone, and polyethylene terephthalate. The thickness is preferably 1 to 30 μm, preferably 1 to 10 μm.

As binders for the overcoat layer and the thermoplastic magnetic ink layer, paraffin wax, microcrystalline wax, carnauba wax, 7-nox oxide, candelilla wax, montan wax, Sasol wax, Fischer-Trob wax, polyethylene wax, α-olefin are used. /maleic anhydride copolymer, fatty acid amide, fatty acid ester, distearyl ketone, ethylene-
Any one of organic substances exhibiting thermoplasticity, such as acetic acid fubolymer, ethylene-ethyl acrylate fubolymer, and epoxy resin, or a mixture thereof.

The ferromagnetic material contained in the heat-coverable magnetic ink layer includes magnetite, manganese zinc ferrite, nickel zinc ferrite, carnet, metal or alloy magnetic particles, and the particle size is 10 to 10,000. People, preferably SOO~s, ooo people.

There are two types of printing methods using thermoplastic magnetic ink media: a contact type (Fig. 20) in which the transfer part makes contact, and a non-contact type (Fig. 21).
Figure) can be broadly divided into

A thermoplastic magnetic ink medium shown in FIG. 19 was prepared and thermal printing was performed.

The printing method was a non-contact type shown in FIG. 21, using a thermal heater as a thermal energy applying means and a permanent magnet as a magnetic attraction force generating means. To explain the embodiment, as shown in FIG. 21, a thermal head 211, an ink medium 212, a transfer paper 213, and a magnet 214 are installed in this order, and the thermoplastic magnetic inks 216 and 217 of the ink medium are transferred to the thermal/ The ink is transferred by applying heat from the surface of the support 203 using a dot.

Polyethylene terephthalate film and polyimide are used as the support, and overcoat MMi is used as a parameter.
A heat-reversible magnetic ink medium was manufactured by determining the composition (viscosity), ink layer composition, overcoat layer thickness, ink layer thickness, and support layer thickness.

Example (8-1) [Overcoat layer composition] Microcrystalline wax (HNP-3) Ichi Nippon Seiro - 70 wt% Carnauba wax Ikko Fine Brodak'n - 23 wt % Edelene-ethyl acrylate (MB-080) - Nippon Unicar 7wt% viscosity 7
0 CP (100'C') [Thermorecessable magnetic ink notification] Magnetite fine particles (1,000 people) 40wt% Refined paraffin wax (HNP-3) - Hiki Seiro-3
0wt% Carnapa Wax No. 1 Ikko Fine Broda Kuu 19wt% Ethylene/
Vinyl acetate copolymer resin (EVA-410) - DuPont Mitsui Polychemicals - 7wt% dye
3.9wt, % dispersion
Agent 0.1wt%
Example (8-2) [Overcoat composition] Paraffin wax (Hi-Mic-2045) - Hiki Seiyaku - 96wt% Ethylene vinyl acetate copolymer resin (El/A-410) -
Mitsui DuPont Polychemical-4wt% viscosity...30c
p (100°C) [Ink layer composition] Same as Example (8-1) Example (8-3) [Overcoat layer composition] Same as Example (8-1) [Ink layer composition] Example (8 -1) Same example (8-4) [Overfoot layer composition] Paraffin wax (145°F) - Hiki Seiwax - 90 wt% Ethylene/vinyl acetate copolymer resin (EVA-577) -
Mitsui DuPont Polychemical-10wt% viscosity...70
cp (100°C) [Ink layer composition] Magnetite fine particles (1,000 people) 40wt% Paraffin wax (NHP-9) - Hiki Seiro - 39wt% α-olefin maleic anhydride copolymer - Mitsubishi Kasei-1
0wt% ethylene/vinyl acetate copolymer resin (EVA~577)-
Mitsui DuPont Polychemical-7wt% dye
3.9wt 5 minutes
Powder 0.1w
t% In the above examples, Examples (8-1) and (8-2) are media with different compositions of particle sizes in the overcoat layer, and Example (8-3) is media with different overfoot layer thicknesses. In Example (8-4), the transfer efficiency was examined using media in which the thickness of the support layer and the ink layer and the composition of the ink layer were different.

Comparative Example (8-1) A conventional thermoplastic magnetic ink medium consisting of a support layer 221 and a thermovisible magnetic ink layer 222 as shown in FIG. 22 was manufactured.

[Overfoot layer composition]

Microcrystalline Wax 1x (Hl-Mi c-1045) Ichiichi Wood Wax - 65wt% Carnauba Wax Ichiken Fine Products 25wt% Ethylene Enal Acrylate (MB-080) Ichi Nippon Unicar + l Owt% Viscosity
...200 cp (100°C) [Ink layer composition] Same as Example (8-1).

Comparative example (8-3) The regulation of the thickness of the overcoat layer was studied.

[Overfoot layer composition]

Same as Example (8-1).

[Ink layer composition]

Same as Example (8-1).

Using the above Examples and Comparative Examples as transfer conditions, the permanent cornerstone was made using a Sam magnet with a maximum energy product of 20 MGOe, and an applied energy of 0 with a thermal head with a resolution of 3000 PI.
, 3 nJ/dot. Rough paper with a Heck smoothness of 3 seconds was used as the transfer paper.

The printed samples were evaluated in terms of transfer rate and dot reproducibility, and the results are shown in Table 8-1.

As shown in Table 8-1, the thermoplastic magnetic ink medium provided with the overfoot layer of the present invention achieved an extremely excellent transfer rate and dot reproducibility, and was able to print with extremely high quality. In addition, equivalent results were obtained even when the support was changed. At this time, the optimal thickness of the overfoot layer was 5 μm or less.

The thicknesses of the ink layer and the support layer are preferably 40 .mu.m or less and 30 .mu.m or less, respectively, since this may lead to a decrease in thermal efficiency.

Further, the heat generating means can provide the same effect not only in the thermal head but also in the energized head.

Furthermore, it goes without saying that the magnetic attraction means may be a t-magnet.

Underfoot Examples Example 9 The structure of the thermocompressible magnetic ink medium of this example will be explained with reference to FIG. 23.

231 is a support layer, 232 is an underfoot layer, 233
is a thermoplastic magnetic ink layer.

It is desirable that the support has heat resistance, mechanical strength, and high smoothness.Materials include resin films such as polyethylene, polypropylene, polyester, polyimide, polyether sulfone, and polyethylene terephthalate. The diameter is preferably 1 to 30 μm, preferably 1 to 15 μm.

Binders for the underfoot layer and thermoplastic magnetic ink layer include paraffin wax, microcrystalline 71x, carnapower wax, oxidized wax, candelilla wax, Monkun 7nox, Fischer-Tropsch wax, α-olefin/anhydrous Maleic acid copolymer, fatty acid amide, fatty acid ester, bustearyl ketone, ethylene-vinyl acetate polymer, ethylene-edel acrylate copolymer, epoxy resin 4! The organic substance exhibiting thermodegradability is any of the following: or a mixture thereof.

The ferromagnetic materials contained in the thermoplastic magnetic ink layer include magnetite (Fe304), manganese zinc ferrite (Mn-Zn-Fe304), nickel zinc ferrite (Ni-Zn-Fe304),
Magnetic particles of metal or alloy, etc. 0 particle size is 1
0 to 10,000 people, preferably 500 to s, oo
o people are good.

There are two types of printing methods using thermoplastic magnetic ink media: a contact type (Fig. 24) in which the transfer part makes contact, and a non-contact type (Fig. 25).
Figure) can be broadly divided into two types.

-Example- A thermal hemmet was used as a thermal energy applying means, a permanent magnet was used as a magnetic attraction force generating means, and the printing method was a non-contact type shown in FIG. 25. To explain its embodiment, as shown in FIG. The ink is transferred by applying heat from the surface of the support 243 using a thermal head.

Two types of support, polyethylene terephthalate film and polyimide film, are used, and the parameters are the underfoot layer composition, ink layer composition, undercoat layer thickness, ink layer thickness, and the original value of the support layer. We have produced a magnetic ink medium.

Example (9-1) Underfoot layer composition Paraffin wax (157°F) - Japanese seminal wax - 50 wt% Microcrystalline 77x (Ml-Mlc-1045) Japanese seminal wax - 43 wt% Ethylene/vinyl acetate Polymer resin (EVA-577)
Mitsui DuPont Polychemicals - 7wt% [thermoplastic magnetic infu 1 composition] Magnetite fine particles (z, ooo people) 40wt% Microcrystalline 7 Nox (Hi-Mlc-1045) Ippon Seiyaku - 35wt% Carnauba Fax Kuchiken Fine Products - 16wt% ethylene/vinyl acetate copolymer resin (EVA-577) - DuPont Mitsui Polychemicals - 5wt% dye
3.9wt 5 dispersant
0.1wt% Example (9
-z) Underfoot row composition paraffin wax (145°F) -Hiki Seiwax-9! l+wt% Ethylene-vinyl acetate copolymer resin (EVA-410) Ichimitsui DuPont Polychemical 5wt% The ink layer composition is the same as Jitsui'] (9-1).

Actual N example (9-3) The undercoat composition is the same as in Example 1.

Ink layer composition Magnetite fine particles (1,000 people) 40wt% Paraffin 7 Nox (HNP-3) - Hiki Seiro - 36wt% Ethylene-ethyl acrylate (MBO80) Ichi Nippon Unicar 10w1% Carnapower
Kusuichiko Fine Products - 10wt% dyed
Fee 3.9wt
5 Dispersant 0
．． 1wt% Example (9-4) The underfoot layer composition and ink layer composition are the same as in Example 1.

In the above examples, Example 1 and Example 2 examine the ink transfer efficiency due to the difference in undercoat layer composition.
In Example 3, we examined the transfer efficiency due to differences in the composition of the ink layer and the thickness of the support layer and ink layer, and in Example 1 and Example 4 we examined the transfer efficiency due to differences in the thickness of the underfoot layer. did.

Comparative Example (9-1) A conventional thermoplastic magnetic ink medium consisting of a support layer 261 and a thermoplastic magnetic ink layer 263 as shown in FIG. 26 was manufactured.

The ink layer composition is the same as in Example (9-1).

Comparative Example (9-2) The underfoot layer was made thicker, and Example (9-1) and Example (9-4) were compared.

The composition of the underfoot layer and ink layer is as in Example (9-1)
is the same as

Using the above Examples and Comparative Examples as transfer conditions, a Sum magnet with a maximum energy product of 30 M G Oe was used as a permanent magnet, and printing was performed with an applied energy of 0 and 3 nJ/dot using a thermal spatula with a resolution of 300 DPI. . Rough paper with a base smoothness of 3 seconds was used as the transfer paper.

The printed samples were evaluated in terms of transfer rate and dot reproducibility, and the results are shown in Table 9-1.

As shown in Table 9-1, the thermoplastic i-based ink medium provided with the underfoot layer of the present invention achieves excellent transfer rate and dot reproducibility even on rough vapor with a smoothness of 3 seconds, and is capable of extremely high-quality printing. Ta.

Furthermore, similar results were obtained even when the support was changed. At this time, the optimal thickness of the underfoot layer was 5 μm or less.

In addition, the heat generating means can provide the same effect not only in the thermal direction but also in the thermal direction.

-Other Embodiments- Each of the above embodiments can be used independently, and the heat generating means is not limited to the thermal head, but can be implemented with any thermal transfer method such as an electric thermal transfer method to achieve the same effect. I can do it.

Further, it is also possible to implement two or more of the respective embodiments in combination, in which case all effects such as the transfer rate will be synergistically improved.

In that case, the combinations with the highest transfer efficiency, good printing quality, and least printing energy are Examples 2, 3,
This was a case of combining 5.6, 7, and 8.9.

FIG. 27 is an example of a device according to the present invention in which a serial type (180DPi, 24 pins) is used as a thermal head, which is produced by combining the above embodiments. To thermal/
The magnetic field 271 and the magnetic field 272 face each other,
Both are driven by belts and move together while maintaining a constant distance from each other. At this time, the magnetic ink film 273 is taken up by the take-up roller 275 in synchronization with this movement.Halogen lamps 274 are installed on both sides of the multi-head 271, and the magnetic ink film 273 is
A thermal bias is applied before and after transfer.

Further, the magnetic ink film 273 at this time has an uneven structure and has an overfoot layer and an undercoat layer.

Further, the heat application energy is applied in a time-division manner, and pulse bias energy is applied as auxiliary application both before and after the heat application.

Also, the structural diagram when the transfer paper 283 is inserted is No. 28Ts.
! In the frame shown in J, the transfer paper 283 and the magnetic ink film 273 are kept at a distance of 100 μm without contacting each other during printing.
The recording dots with the printing valleys are thermally rolled by the heat roller 281 and the backup roller 282. The recording dots obtained at this time had the highest transfer efficiency (100%) not only in the conventional printing but also in the actual examples, and there was no smudging of characters, and the printing speed was increased.

FIG. 29 shows an example of an apparatus according to the present invention in which a line head is used for the thermal head, and the structure is basically the same as the embodiment of the apparatus using a serial head.

The thermal head 291 and the magnetic head 292 face each other, and the vertical distance between them is set to be constant at any part of the thermal head 291.

During printing, the transfer paper 297 and the magnetic ink film 296
The printed dots are kept at a distance of 1100a without contact, and the printed dots are placed between the heat roller 281 and the backup roller 28.
2 to obtain recording dots 298, and the thermal head 291 (7) Mm is equipped with a halogen lamp 296.
A thermal bias is applied to the magnetic ink film 296 before and after transfer.

Further, the magnetic ink film 296 at this time has an uneven structure and has an overfoot layer and an underfoot 1.

Further, the heat application energy is applied in a time-division manner, and pulse bias energy is applied as auxiliary application both before and after the heat application.

At this time, recording dots with high transfer efficiency (100%) were obtained not only in the conventional but also in the example slippers, and there was no smudging of characters, and the printing speed was increased.

The embodiment described here is only an example, and is not limited to this embodiment. The recorded portion of thermoplastic magnetic ink is transferred to the transfer target by magnetic attraction force by controlling thermal energy. Effective for all printing methods, iJcM.

In addition, in the above embodiment, the method in which the energy applied for recording dot transfer is time-divided and applied to the ink in two or more times is a method in which the ink and the transferred object do not come into contact with each other in the non-recorded portion of the ink (non-contact). This method is effective not only for (type) printing devices but also for contact type printing devices.

Further, the method of adding bias energy as auxiliary applied energy is also effective in a contact type printing vc device if the auxiliary applied energy is applied after the thermal energy for transfer is applied. In this case, the surface portion is melted by the auxiliary applied energy even if there is little ink.

Similarly, when applying a thermal bias, even a contact type printing device is effective as long as the thermal bias is applied after printing.

Furthermore, an ink medium that can be used in the above-mentioned printing device or the like is provided with unevenness on the surface of the magnetic ink layer, and an overfoot layer on the surface of the ink layer. Techniques such as providing an undercoat layer between the ink layer and the support are effective not only in non-contact type printing devices but also in contact type printing devices.

〔Effect of the invention〕

As described above, the present invention includes a means for applying thermal energy to a recording portion of thermoplastic magnetic ink and a means for generating a magnetic attraction force to the ink, and by controlling the application of thermal energy, In a printing device that transfers a recorded portion of ink onto a transfer medium using magnetic attraction force, the ink and the transfer medium are configured so that they do not come into contact with each other at the recorded portion of the ink, so that conventional technology cannot The process of peeling off the ink medium becomes unnecessary, and the ink transfer efficiency can be greatly increased.

Furthermore, since it is a non-contact type, the ink can be transferred regardless of the surface shape of the transfer medium, resulting in recording dots with a normal shape, that is, with high transfer efficiency. Therefore, it is possible to form high-quality characters and images even on paper with extremely poor surface smoothness, film with poor affinity with ink, and the like.

Furthermore, since the non-recording area and the transfer medium are not in contact with each other, smearing of characters does not occur.

Furthermore, since the heat loss is extremely small, the heat application energy can be reduced, and by shortening the application time, it is possible to speed up printing. Furthermore, when a T-magnet is used as the magnetic attraction means, the attraction force can be controlled, and the power can be turned off during non-transferring to remove magnetic dust, ink, etc. It can prevent the throat from sticking to the magnet.

Furthermore, if a permanent magnet is used as the magnetic attraction means, it is possible to create an energy-saving printing device.

In addition, when applying heat energy applied from the throat to the thermal ink in a time-divided manner, the temperature of the ink is not increased more than necessary, so the ink itself is not thermally destroyed. This enables printing with even better transfer efficiency with the minimum heat application energy required for transfer.
It is possible to use an energy-saving printing SA station.

In addition, when applying auxiliary energy before, after, or both before and after applying heat energy from 7 degrees to thermal, the temperature of the ink must be raised to around the melting point in advance, or the The temperature of the ink that has increased due to the heat applied energy is maintained, or
Since it can do both, it is possible to reduce the heat applied energy during printing and print with even better transfer efficiency λ.
Furthermore, printing speed can be increased.

In addition, when thermal bias is applied to the ink before and/or after printing, or both before and after printing, whether the ink is already in an activated state before thermal printing energy is applied; Alternatively, it can also be activated after applying heat printing energy (
Because the molten state is maintained for a long time, or both, it is possible to perform transfer using less thermal printing energy, which was previously impossible, and the transfer efficiency is also greatly improved.
Since less thermal printing energy is required, printing can be done faster and with higher density.

In addition, when a heat roller is provided, the area of the recording dot can be greatly expanded by hot rolling the recorded dots formed on the transfer medium with the heat roller, and the area of the recording dots can be greatly expanded. It can improve the fixing power during transfer.

Furthermore, by enlarging the recording dots, less thermal printing energy is required than in the past, which allows faster printing and higher printing density.

Furthermore, when the surface of the ink has an uneven structure, less work is required to deform or make the ink fly in response to a certain magnetic attraction force, compared to a conventional smooth surface. Therefore, it is possible to greatly increase the transfer efficiency. It requires less energy to apply heat than before,
This allows for faster printing and higher A density.

Further, by providing an overcoat layer on the upper surface of the ink and by providing an underfoot layer on the back surface of the ink (between the support layer and the ink), the transfer efficiency can be greatly improved.

Needless to say, in addition to the effects described above, the effects can be synergistically increased by combining the above features.

From these facts, the present invention has the following advantages: 1. It is possible to print a number of recording dots with very high transfer efficiency on transfer paper with poor surface smoothness or on a film that does not have very high affinity with the ink.

2. Prevents smudging of letters.

3. Heat loss during heat application during printing is extremely small.

4. It is possible to increase the density of recording dots.

It has at least one effect.

Furthermore, the present invention is not limited to this embodiment, but is effective for all printing methods and apparatuses that transfer a recorded portion of thermopressure magnetic ink to a transfer target by magnetic attraction force by controlling thermal energy. .

[Brief explanation of drawings]

Fig. 1 - Detailed explanatory diagram of the present invention Fig. 2 - (a) Detailed explanatory diagram of the present invention (b) Operation explanatory diagram of Embodiment 1 □ (c) to (g) ! of Embodiment 1! Magnet configuration diagram FIG. 4 - Explanatory diagram of circuit configuration example of Example 1 FIG. 6 - (a) Detailed explanatory diagram of the present invention (b) - (c) Explanatory diagram of x8i stone structure example of Example 2 - Ink temperature one hour graph of Example 1 Figure 7 - (
a) An explanatory diagram of the circuit configuration example of Example 3-1 (b) An explanatory diagram of the pulse application side of Example 3-1 (c) An hourly graph of the ink temperature of Example 3-1. Comparative example explanatory diagram Figure 9 - (a) Circuit configuration example explanatory diagram of Example 3-2 (b) Pulse application side explanatory diagram of Example 3-2 (c) Ink temperature one hour graph of Example 3-2 Figure 1O - (a) An explanatory diagram of a circuit configuration example of Example 4-1 (b) An explanatory diagram of a pulse marking example of Example 4-1 (c) An hourly ink temperature graph of Example 4-1 Figure 11 -(a) Pulse application example of Example 4-2 (b) Ink temperature one hour graph of Example 4-2 Figure 12 -C&) Pulse application example of Example 4-3 (b) Ink temperature one-hour graph of Example 4-3 Figure 13 - (1) Explanatory diagram of the configuration side of Example 5-1 (b) Explanatory diagram of the configuration side of Example 5-2 (c) Explanatory diagram of the configuration side of Example 5-3 Configuration side explanatory diagram (d) Configuration side explanatory diagram of Example 5-4 (e) Configuration side explanatory diagram of Example 5-5 (f') Configuration example diagram of Example 5-6 Part 14 - Implementation Configuration example of Example 6-1 Figure 15 - Operation explanatory diagram of Example 5-1 Figure 17rXJ - Configuration example of Example 7 Figure 18 - Comparative example of Example 7 Explanation diagram 19 Figure - Explanation diagram of ink layer with overfoot of Example 8 Section 20 - Example of contact type structure of Example 8 Part section Figure 21 -
Non-contact configuration example of Example 8 Figure 22 between parts - Example 8
Fig. 23 - An explanatory diagram of an ink layer with underfoot of Example 8 - Fig. 24 - An explanatory diagram of a contact type structure of Example 9 - Fig. 25 -
Example 9 of non-contact configuration Figure 26 between parts - Example 9
Fig. 27 - Explanatory diagram of the structure near the head of the serial type printer of the comprehensive embodiment > Fig. 28 - Explanatory diagram of the operation of the serial type printer of the comprehensive embodiment Fig. 29 - Line of the comprehensive embodiment Structural diagram and operation example near the head of a type printer Figure 30 - Explanatory diagram of the configuration of the conventional example Figure 31 - Illustration of transfer problems in the conventional example Figure 32 - When printing on rough paper with the conventional example Figure 33 - Illustration of recorded dots printed on rough paper in conventional example Figure 2 (f) Figure 2 (Q) Q XI X2 X3
X CJL & Iur period (b) Fig. 3 Fig. 4 (a) Flute 5 Fig. 5 Fig. 6 (a) 621081 (msecl) (b) Fig. 7 (c) Fig. 7 1. (rnsecl Fig. 8 (a) Between E9 force σ1 (msee) (b) Fig. 9 [I] Between B!r (rnsee 1 (C) Fig. 9 cc (a) Fig. 10 Between 6ρ1 Jol14 [ m5ecl (b) (C) Fig. 10 [74011 (rnsec) (b) Fig. 11 EP force al1 (rnsec) - (Q) 4 Flow time [cold seC (b) Fig. 12 (a) (b) Figure 13 (c) (d) Figure 13 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 Figure 21 Figure 22 Figure 23 Figure 24 Figure 25 Figure 26 Figure 27 Figure 28 Figure 30 Figure 31

Claims (1)

[Claims] It has a means for applying thermal energy to a recorded portion of thermoplastic magnetic ink and a means for generating a magnetic attraction force to the ink, and by controlling the application of thermal energy, the recorded portion of the ink is transferred to a transfer medium by the magnetic attraction force. 1. A printing device for transferring ink to a transfer medium, wherein the ink and a transfer medium do not come into contact with each other in a non-recording portion of the ink.