JPH03292153A - Electrotransfer recording method and device therefor - Google Patents

Abstract

PURPOSE:To make quality images obtainable in high-speed, supersensitive processing by a method wherein insulating supporting members that support a separate electrode and a common electrode in a way that both the electrodes are placed facing each other are provided, and the separate electrode is positioned on the feeding side and the common electrode is positioned on the delivery side of a resistance layer. CONSTITUTION:A separate electrode 11 and a common electrode 12 are arranged so that both the electrodes face each other, and are buried in insulating supporting members 13, 14 and 15. The low potential side of a drive circuit that drives an electrifying head is connected to the separate electrode 11, and the high potential side thereof is connected to the common electrode 12. When recording is made with an ink sheet 2 and an image-receiving body 3 made to travel, an electric current flows from the common electrode 12 to the separate electrode 11 through the inner surface of a resistance sheet 21 by means of recording voltage applied between the separate electrode 11 and the common electrode 12. By flowing of this electric current, the resistance sheet 21 generates Joule heat from its part positioned between the electrodes. By the above-mentioned heat, a part of a coloring material layer 22 moves to an adhesion layer 32, and thereby dots are formed on the image-receiving body 3. Images obtained on the image-receiving body 3 by the above-mentioned method are in excellent quality having less nonuniformity of density and are resistible to deterioration of quality in continuous recording. Therefore supply of images of superior quality is ensured.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electric transfer recording device and an electric transfer recording method, and more particularly to an electric transfer recording device and an electric transfer recording method that can realize high-speed, high-sensitivity, and high-quality images. However, the conventional technology is the current transfer recording method (i.e., a plurality of recording electrodes are brought into contact with a recording sheet equipped with a resistance layer, and a recording voltage corresponding to the recording signal is applied between the recording electrodes, thereby increasing the resistance under the recording electrodes. A recording method that generates Joule heat in the layer and uses this heat to color the heat-sensitive layer, or melts or sublimates ink and transfers it to recording paper to obtain an image. A full-color image is created using an electric dye transfer method C that uses an ink sheet (hereinafter referred to as a resistance sheet) on which an ink layer containing a sublimable dye is provided, an image receptor with a dyed layer on its surface, and an electric head. The current-carrying head ζ used in this current-carrying dye transfer method is suitable for realizing high-speed printing. Deamo Mata
A board with multiple electrodes arranged to face each other in a one-to-one correspondence The bottom structure is also conductive so that voltages of the same polarity are applied with a common electrode.For example, as shown in Figure 3, the conductive A plate-shaped common electrode C forming one pole and a plurality of needle-shaped selection electrodes S1 to S6 forming the other pole are arranged in parallel on the surface of C) R made of a magnetic substance to correspond to the printed pattern. It is configured to conduct electricity to the selection electrode and the common electrode, and from the selection electrode S2 toward the common electrode C,
Current flows along the path shown by the arrow in the figure, and the heat generated in this area causes the heat-sensitive layer to develop color, or the ink to be melted or sublimated and transferred to the recording paper. When performing high-speed gradation recording using sublimable dye as a coloring material to obtain high-quality images, the recording energy is higher than ζ.Conventional current-carrying heads have the following problems.a Resistance sheet insertion side The contact conditions with respect to the resistive sheet are significantly different between the electrode on the side and the electrode on the sending side.

In other words, the electrode on the insertion side always contacts the unused part of the resistance sheet 4-4. The electrode on the exit side must come into contact with the part of the resistor sheet that has been thermally damaged due to the generation of large Joule heat between the opposing electrodes.However, with a conventional current-carrying head, the output is not possible. The contact area of the side electrode is not large enough, resulting in poor contact between the sending side electrode and the resistance sheet.
There was a problem that the image quality deteriorated significantly and that it could not withstand continuous recording.Also, it is known that when a resistor sheet is energized, the electrode with a higher potential is damaged. When the other electrode is repeatedly energized, it will change color.
This also means that the contact resistance increases.In the case of conventional current-carrying heads, if we compare the electrode with a higher potential to which recording voltage is frequently applied to the electrode that is not frequently applied, the degree of damage caused by current-carrying differs. , even if the contact resistance is different, i.e., the inter-electrode resistance value is large when driving a heavily damaged electrode, and the inter-electrode resistance value is small when driving a lightly damaged electrode, and the inter-electrode resistance values vary from one another. . Due to this variation, there was a problem that density unevenness occurred during recording.The present invention takes into consideration the above-mentioned problem.The contact of the electrodes on the resistance sheet delivery side is stable, and the variation in the resistance value between the electrodes is small.
That is, the present invention provides a current transfer recording device and a current transfer recording method that can realize high-speed, high-sensitivity, and high-quality images. an electrically conductive head that performs recording by bringing the separation electrode and the common electrode into contact with a resistance layer, the head comprising an insulating support that supports the separation electrode and the common electrode in opposition; The common electrode is arranged on the insertion side of the resistance layer, and the common electrode is arranged on the output side of the resistance layer. The current transfer recording method is characterized in that the potential of the common electrode is lower than that of the common electrode. This stabilizes the contact of the electrode on the sending side of the resistance sheet, which originally has poor contact conditions, and allows good contact with the resistance sheet to be obtained. By doing so, it is possible to reduce damage to the electrodes due to energization and to make the contact resistance uniform on the common electrode.
EMBODIMENT OF THE INVENTION A current transfer recording apparatus and a current transfer recording method according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of the tip of the current-carrying head in an embodiment of the present invention. In FIG. 1, 11 is a plurality of separated electrodes;
12 is a common electrode; 13, 14, and 15 are insulating supports;
14 and 15, the arrow in Figure 1 indicates the running direction of the ink sheet.As can be seen from this arrow, the separation electrode 11 is placed on the insertion side of the ink sheet. Although the common electrode 12 is disposed on the exit side of the electrode, Figure 2 is an enlarged view of the main part of the energized transfer recording method in the embodiment of the present invention. is an image receiving & 4 is a platen. A mica ceramic plate with a thickness of 80μ is used as an insulating support 14. A separation electrode 11 made of chromium and nickel is placed on one surface.
The width of the separation electrode 11 is 80g.
A thin plate made of a mixture of boron nitride and silicon nitride with a thickness of 1 mm was used as the insulating support 15. A thin plate made of a mixture of boron nitride and silicon nitride was used as the insulating support 15. The thickness of the common electrode 12 is 10μ, and the insulating support 13 made of mica ceramics has a thickness of 1 mm, the insulating support 14 in which the separation electrode 11 is formed, and the common electrode 12. The separated electrode 11 is in contact with the insulating support 13, and the common electrode 12 is attached to the side of the insulating support 14 that does not have the separated electrode 11. The end face of the laminate made in this way was polished with 1000 to 8000 grit abrasive paper to form a current-carrying head.Next, carbon was mixed into aramid resin to a thickness of 10 AL.
A resistive sheet 21 was created by forming a film with a surface resistance value of 1 and a resistance value of 1 Ω/mm.On top of this, a layer of indoaniline cyan sublimable dye of 1 part and polycarbonate resin of 1 part was added to a thickness of 2 parts by weight solid content.
A color material layer 22 of 100 μm is formed, an ink sheet 2 is formed, and a milky white PET film of 100 μm thickness is used as the base paper 31.
．． A dyeing layer 32 with a thickness of 8 μm and a weight/solid content ratio of 2 was provided, and an image receptor 3 was formed using the energizing head 1, ink sheet 2, and image receptor 3 prepared as described above. First, place the ink sheet 2 so that the color material layer 22 is in contact with the dyed layer 32 of the image receptor 3, and use the platen 4 with a diameter of 60 mm from the base paper 31 side of the image receptor 3. 5kg/1 on the current-carrying head 1 in contact with the resistance sheet 21
A load of 100 rn was applied, and the low potential side of the drive circuit of the current-carrying head was connected to the separation electrode 1.
1. Connect the high potential side to the common electrode 12 and ink sheet 2.
The recording voltage applied between the separation electrode 11 and the common electrode 12 causes the common electrode to be A current flows from 12 to the separation electrode 11 through the surface of the resistive sheet 21, and this current generates Joule heat in the portion of the resistive sheet 21 located between the electrodes. Even if the image transfers to the deposited layer 32 and dots are formed on the image receptor 3, the image ('!) on the image receptor 3 obtained in this manner.

The density unevenness is very small and the t is also good.The image quality does not deteriorate even after recording approximately 100 screens in a row, and excellent images are obtained after nine recordings. When observed with a microscope, is the surface of the separation electrode 11 in good condition? Q,
-X The surface of the return electrode 12 suffered very little and uniform damage from energization, and no factors that would cause image quality deterioration or density unevenness were observed. Although the configuration is such that the return electrode 12 is formed on the support 14 and the return electrode 12 is formed on the insulating support 15, the configuration of the energizing electrode 1 is not limited to this (the separation electrode 11 is formed on the insulating support 13).
or the common electrode 12 formed on the insulating support 14
L% L-shaped plate that can be formed on top
With the configuration shown in the embodiment, the pressure from the platen 4 can be sufficiently applied, so that the contact between the recording electrode 11 and the common electrode 12 with respect to the resistance sheet is particularly good. Electrode materials are not limited to those made of chromium and nickel. Although alloys can be used, considering arc resistance, it is desirable that the melting point of the electrode material be 900°C or higher.Furthermore, in order to reduce high temperature oxidation, S
It is also effective to add i or A1.For the insulating supports 13, 14, and 15, ceramic-containing glass materials with a small friction coefficient and high wear resistance can be used, and boron nitride can be used. Aluminum nitride Alumina, mica glass ceramic containing crystallized glass Kaolin, talc, etc. can be used. However, in consideration of heat storage in the current-carrying head, it is desirable to use a material with high thermal conductivity for the insulating support 15. The resistive sheet 21 may also be a resistive film formed by mixing conductive particles such as carbon into a heat-resistant resin. Even if a film-forming resin such as polyetherketone is used, these resistive films are good if the thickness is about 4 to 15 g and the surface resistance value is about 1 Ω/mm. The color material layer 22 can be used as long as it is formed of at least a sublimable dye and a binder resin. , further comprising an insulating support supporting the separation electrode and the common electrode so as to face each other, the current-carrying head performs recording by bringing the separation electrode and the common electrode into contact with a resistance layer, the separation electrode being connected to the resistance layer. The common electrode is placed on the output side of the resistive layer to stabilize the contact of the electrode on the output side of the resistive sheet, which originally has poor contact conditions. By performing recording using a current-carrying head, image deterioration due to poor contact does not occur even when continuous recording is performed. By setting the potential lower than that of the electrodes, there is no variation in resistance value between electrodes caused by differences in electrode damage due to energization, and there is less unevenness in concentration.

[Brief explanation of drawings]

Figure 1 is a perspective view of the tip of the current-carrying head in an embodiment of the present invention; Figure 2 is an enlarged view of the main part of the current-carrying transfer recording method in the embodiment of the present invention. Figure 3 is an enlarged view of the main part of a conventional current-carrying head. It is. 1...Thread head, 2...Ink sheet, 4...
・Platen, 11... Separation electric machine 113, 14, 1
5... Insulating support

Claims (6)

[Claims] (1) A plurality of separated electrodes, a common electrode, and an insulating support supporting the separated electrodes and the common electrode so as to face each other, and record by bringing the separated electrodes and the common electrode into contact with a resistance layer. An electrical transfer recording apparatus characterized in that the separation electrode is arranged on the insertion side of the resistance layer, and the common electrode is arranged on the delivery side of the resistance layer. (2) The insulating support of the current-carrying head includes a first insulating support placed on the insertion side of the resistance layer, a second insulating support placed on the delivery side of the resistance layer, and the first insulating support placed on the delivery side of the resistance layer. a third insulating support disposed between the second insulating support and the second insulating support, the side facing the third insulating support on the surface of the second insulating support; 2. The electrical transfer recording apparatus according to claim 1, wherein a common electrode is formed on the third insulating support, and a separation electrode is formed on a side of the third insulating support opposite to the first insulating support. (3) Separate electrodes or common electrodes are heated to at least 900°C.
The electrical transfer recording device according to claim 1 or 2, characterized in that it is made of an electrically conductive material having a melting point above or above. (4) A plurality of separated electrodes, a common electrode, and an insulating support supporting the separated electrodes and the common electrode so as to face each other, and recording is performed by bringing the separated electrodes and the common electrode into contact with a resistance layer. Current transfer recording is characterized in that the recording is performed using a current supply head in which the separation electrode is arranged on the insertion side of the resistance layer and the common electrode is arranged on the output side of the resistance layer. Method. (5) The energization transfer recording method according to claim 4, wherein the energization head has the structure according to claim 2 or 3. (6) The electrical transfer recording method according to claim 4 or 5, wherein the potential of the separated electrode is lower than the potential of the common electrode when applying the voltage.