JPS62176898A - Printing method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a non-impact printing device, and more specifically, the present invention relates to a non-impact printing device, and more specifically, to a non-impact printing device that uses heat and magnetism to transfer Netsucho Plastic Research Ink onto a transfer medium. This relates to a printing method for obtaining a 1 character 0 image.

[Conventional technology]

As a low-cost non-impact printing method.

Many products have been proposed using magnetic ink.

For example, the method described in Japanese Patent Application Laid-Open No. 52-96541.

A-air ink is used as the ink of the melting heat transfer method, and mCB air means is provided separately from the heat supply means.

A magnetic attraction force is applied to the ink corresponding to the thermal image to transfer the image. That is, as shown in FIG.
6, and the thermoplastic magnetic ink 34 of the ink medium
When heat is applied from the 56 side of the base film by a thermal head (directly below the head), the ink is brought into contact with the transfer paper, and after melting and adhering to the ink gold transfer paper, the ink medium is peeled off from the transfer paper, This is for ink transfer. Furthermore, the AFI suction force has the effect of increasing the probability of contact of the molten ink with the transfer paper, and the effect of increasing the transfer rate to the paper when the ink medium is peeled off, resulting in poor surface smoothness. It is also possible to print 9 images of characters on Rough Paper+.

[Problems that invention attempts to resolve]

However, in the above-mentioned conventional technology, when the ink medium is peeled off, the ink in the recording area to be transferred comes into contact with the base film and the ink in the non-recording area.
However, when it melts and adheres to the transfer paper, a force acts to peel off the ink in the recording area along with the base film from the transfer paper, causing transfer defects. In this case, there are Fum (ink-to-transfer paper interlayer force) and FB (ink cohesive force), which are the accelerating forces for transferring the ink to the transfer paper, and the car Fo (ink-to-paper), which hinders the transfer. Adhesion between base films) and FD
(between the ink in the recording area and the ink in the non-recording area)
FB+Fh)':)'If the relationship of Fa+FD is always established, the transfer will be completed. In the figure, 41 is the base film, 42 is the ink in the recording area - 45 is the ink in the non-recording area, and 44 is the '+fL noodle copy. It's paper.

In the conventional method, the ink in the recording area melted in the ink bath is pulled in the direction of the force of the transfer paper by magnetic attraction, which increases the probability of contact with the transfer paper and increases Fh'r in FIG. be. In other words, compared to the general thermal transfer method,
Although the ink transfer rate is higher, it is still -FO
, When transferring to a transfer paper with extremely poor surface smoothness in the 1% range where FD is present, the above-mentioned case of F<FO+FD occurs, resulting in the problem of defective transfer. 7t.

Therefore, the present invention solves this difficult problem.
The purpose of this method is to use a printing force method that can print extremely high-quality characters and images even on transfer paper that has very poor surface smoothness, and on film that has poor affinity with ink. It is in a place where we provide.

Ninth Means to Solve All Problems C] The printing method of the present invention includes means 11 for applying thermal energy to a recording area 15 of thermoplastic ink as shown in FIG.
and a means 15 for generating a magnetic attraction force on the ink,
This is a printing method in which the recorded portion of the ink "T" is transferred to the transfer medium 14 by the magnetic attraction force by controlling the thermal energy stamp opening, and the ink and the transfer medium are separated by the ink. Recording portion 12 (FM is the $air attraction vector.

), in the non-contact printing method, the vibration bias means 162a is applied before application or after application is applied as a gold % 0 [Operation] According to the above structure of the present invention, thermoplastic G ink and the transfer medium are not in contact with each other in the non-recorded portion of the ink. Thus - ink transfer is effected by magnetic attraction in the thermally activated state of the ink, and the prior art ink media peel-off process is unnecessary. That is, the second
Figure (a), <1)), (C).

In (d), fcFa, yI), which prevents transcription, is O
Therefore, the transfer rate becomes extremely high. To add more, 1
During ink transfer according to the present invention, F'0 as shown in FIG. F'D acts as a resistance force for ink transfer, but this is because the ink is activated.

The deviation when peeling off (when the ink temperature has dropped) is also small.

Also, there is a method in which the ink temperature does not drop, that is, the ink medium is peeled off immediately after the head, but in this case, as soon as the ink is damaged, transfer reproducibility will be lost. There is.

Furthermore, as a vibration bias, a vibration imparting device t consisting of a piezo pressure element was provided. Therefore, the molten ink flows and becomes leveled by vibrations of an appropriate frequency from the imaging bias. I worked on it,
Conventionally, due to the difference in surface tension between solid ink and liquid ink, the flow phenomenon of liquid ink is hindered due to the difference in surface tension between solid ink and liquid ink. The image is transferred to the transfer medium, and as a result, the transfer effect area becomes higher than conventionally.

[Practical Example [1]] FIG. 2(a) shows a schematic diagram of an embodiment of the present invention. A thermal head 21 was used as a thermal energy applying means and a mountain air suction force generating means in the permanent bleeding 26.

As shown in the figure, during non-recording, the ink medium 22 and the transfer paper 25 (the type is 5-Worth 405 paper with a smoothness of 6 seconds) do not come into contact with each other, and are maintained at a distance of 1 m apart directly below the head. Ta. The ink medium was a DET film 25 with a thickness of 6 .mu.m, which was uniformly coated with the following thermoplastic magnetic ink 24i to a thickness of 6 tt m.

[Ink composition]

1, Magnetite fine particles 40wtφZ Carnauba wax 20wt%5 Paraffin wax 3L) wt%4, KVA (ethylene-vinyl acetate copolymer) 5wt%5, Dispersant 4 ・wt%6,
The dye Iwt permanent magnet was a Sam magnet with a maximum energy tfi of 25.3 K Gθ, and permendur, which is an Fe-co alloy, was attached to the tip. When printing was performed using a thermal head with a resolution of 2000 PI with an applied energy of α5mj/dot (pulse width t Om5ec ), the area of the heating element (125μm×14θIi m ) of the thermal head was 7.
More than 0% of the ink surface area was transferred to the receiving paper.

(Hereinafter, transfer efficiency shall have the above meaning. Also,
Experimental conditions and ink compositions are not limited to those described above. ) Example (2)-U The same printing device, the same permanent 8 stones, and the same thermal head as in Example [1] were used, the same ink composition and transfer paper were used, and a piezoelectric element was used as the vibration bias hand. A vibration applying device 28 consisting of the following was attached to the thermal head as shown in FIG. 2 (1). It receives a synchronization signal from the thermal head, and the head generates heat and vibrates at the same time. The transfer efficiency was investigated by varying the vibration frequency of the piezoelectric element, and the results are shown in the table. (Example 1 is included as a standard) Real sister? llLη ~ [16] Ejishio 11 (Under the same transfer conditions as 1j, the vibration imparting device 28 consisting of a hiezo pressure element with an agitation bias is connected to both a thermal head and a permanent pressure circuit as shown in C in Fig. 2. This was also synchronized with the thermal head L as in Examples (2) to (6), and the vibration frequency of the piezoelectric element was varied to examine the transfer efficiency.

The results are shown in the table.

Examples [17] to [23] The same transfer conditions as Example 0], and the imaging bias of Example (
The tomofudo imparting device shown in 2) was attached to the Koyu Nanamizu Ku air circuit as shown in D in Figure 2. The above example of real power ~ [16]
Similarly, the thermal head pulse signal is synchronized,
Similarly, by changing the imaging frequency of the indentation element, the transfer efficiency was measured fC.

The results are shown in the table 〇 In the case of this leprosy fQ (173-(25)), after the ink is transferred to the transfer paper, the ink dots are leveled by vibration, and the transfer area is expanded. .

Comparison 4/ij 1゜As shown in Figure 4, the thermoplastic ink of the ink medium
When heat is applied from the base film surface by a thermal head, it is brought into contact with the transfer paper, and after the bath-melted ink is brought into contact with the transfer paper, the ink medium is peeled off from the transfer paper and the ink is transferred. The transfer efficiency was only 40 inches, resulting in very poor printing quality.

〔Effect of the invention〕

According to one aspect of the present invention, 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 is capable of controlling the application of thermal energy. In a printing device that transfers the recorded portion of the ink to the temporary transfer rope using 6 air suction force, the ink and the transfer medium are structured so that they do not come into contact with the non-recorded portion of the ink, and vibrations are prevented. Make the bias before printing! Or, since it was applied after the application, it became possible to significantly improve the low ink transfer efficiency of the conventional technology. This essentially solves the drawback of poor printing quality on rough paper, and has the effect of allowing extremely high quality printing without being affected by the surface condition of W transfer paper.
f. The present invention is not limited to the six embodiments, but is effective for all printing methods in which thermal energy is controlled and the recorded portion of thermoplastic magnetic ink is transferred onto a transfer medium using the attractive force. It is.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the principle of a printing method according to the present invention. Figure 2 (a), (t)), (C), (d)
It is a diagram showing a practical example of the printing method of the present invention. FIG. 5 is a diagram illustrating the various forces acting on the ink when the ink medium is peeled off in the thermal transfer method of the present invention. Figure 4 shows the principle of the conventional printing method. 11... Thermal energy application means 12... Ink non-recorded portion 15... Ink recorded portion 14... Transferred medium 15... Hunting attraction force generation means 16... Vibration bias FM. ...A-air attraction vector 21...Thermal head 22...Ink medium 25...Base film 24...Thermoplastic air ink 25...Transfer paper 26...Permanent magnet 27... Breaking transfer magnetic ink 28...Vibration bias applying device (piezoelectric element) 51...Thermal head 32...Ink medium 33...Base film 64...Plastic magnetic ink 35...Transfer medium 66 ...Magnet and above Applicant: Seiko Epson Corporation Figure 1 Figure 2 Figure 2 (C) Figure 2 (d) Figure 2 A FB Figure 3 Figure 4

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 suction force to the ink, and by controlling the application of thermal energy, the recorded portion of the ink is subjected to the magnetic suction force. This is a printing method in which the ink is transferred to a transfer medium, and a printing method is adopted in which the ink and the transfer medium do not come into contact with each other in a non-recorded part of the ink, and a vibration bias is applied to the transfer medium and 1 or the transfer medium. 1. A printing method characterized in that a printing method is applied before and after printing.