JPS623958A - Recording method - Google Patents

Abstract

PURPOSE:To eliminate the clogging of ink and to enable to freely select the color of ink by a method wherein ink drops are trapped in the fine holes of the ink carrier, and after that, the recording signal light is radiated on the ink drops while the ink carrier is fed, or after the ink drops are exposed under corona discharge, the recording signal light is radiated on the ink drops. CONSTITUTION:While voltage is impressed on a conductive core material 1', the constituent member of an ink carrier 1, through a transparent conductive electrode 6, recording signal light R is radiated on ink drops 3 trapped by the carrying holes 2 of the ink carrier, hereby the electric resistance of a photoconductive material layer 1'' drops and charge is injected in the ink drops 3. The ink carrier 1 irradiated with the recording signal light R is faced to an opposed electrode 5 through a recording paper 4 and when voltage is impressed between the ink carrier 1 and the opposed electrode 5, transferred ink drops 3' are sucked to the opposed electrode side and adhere on the recording paper 4. The ink drops 3, wherein charge is not injected, stay on the ink carrying body side being left intact a state that the ink drops 3 are trapped in the ink carrying holes 2. By such a way, an image to correspond to the recording signal light can be formed on the recording paper 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a recording method, and more particularly, the present invention relates to a recording method, and more particularly, the present invention relates to a recording method, and more specifically, an ink carrier in which a conductive core material having a large number of micropores is coated with a photoconductive material. The present invention relates to a recording method in which ink is moved from an ink carrier to a recording paper side using an electric field in response to a recording signal light.

[Technical background of the invention and its problems]

As a recording method on plain paper, for example, a particle transfer method using magnetic powder and a rotating magnetic field and an electric field is known (for example, see Japanese Patent Publication No. 51-4.6707).

In these methods, a developing step or a fixing step is essential. This has resulted in drawbacks such as a complicated recording device and complicated recording operations.

As a method for solving these drawbacks, an inkjet recording method that does not require a developing step and a fixing step is attracting attention. As this inkjet recording method, a method is known in which magnetic ink in a nozzle is vibrated with an alternating magnetic bias to facilitate the flight of the ink by an electric or magnetic field (see, for example, Japanese Patent Publication No. 15419/1983). .

However, in these methods, the nozzle tip of the device used tends to become clogged due to drying of the ink, and the reliability is poor. As an inkjet recording method aimed at preventing this nozzle clogging, for example, magnetic ink is attached to a multi-needle recording electrode, and the magnetic ink is applied by magnetic force to the recording electrode Mt tip 7+j(l;i 71X; C1
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As a method for making the ink carrier capture ink, there is a method of dipping the ink carrier into the ink, or a method of pressing an ink roll impregnated with ink into a sponge or Fell 1 onto the ink carrier. etc. can be used. The ink used here is preferably a conductive ink, but even in the case of an oil-based ink with low conductivity, good recording can be achieved by applying a sufficiently high voltage to the conductive core material of the ink carrier. It can be carried out.

In addition, the ink droplets remaining on the ink carrier after the ink has been transferred to the recording paper side are removed from the fine pores by sliding them under pressure with a sponge roll or felt roll with a low ink content. It can be removed relatively easily. Furthermore, as shown in the attached FIGS. 5 and 6, when the ink droplets remaining on the ink carrier are positively or negatively charged, the ink carrier and the sponge roll or felt whirl are separated. It is possible to suction and remove by Coulomb force without pressing and sliding. Removing ink droplets remaining on the ink carrier is
This is particularly preferred when the recording device is not operated for a long period of time.

Next, irradiation with recording signal light will be described. This irradiation can be performed while supplying power to the ink carrier, or after the ink carrier is exposed to corona discharge to charge the ink droplets.

Specific examples of the recording signal irradiation method in the method of the present invention are listed below.

(A) In the conductive core material of the ink carrier that captures the ink,
While applying a voltage, the photoconductive material layer around the micropores is irradiated with recording signal light. This allows charge to be injected into the ink droplets in the micropores. Next, by applying a voltage between the ink carrier and the counter electrode using the counter electrode that faces the ink carrier through the recording paper, only the charged ink droplets are attracted to the recording paper by Coulomb force. Let it fly and record it.

(B) The ink carrier that has captured the ink is exposed to corona discharge to charge the ink droplets in the micropores, and then is irradiated with recording signal light. This allows the charges of the ink droplets in the micropores to leak toward the conductive core material through the photoconductive material layer. Recordings are then made as in (A) by using counter electrodes.

(C) The ink droplets in the micropores are charged by exposing the ink carrier that has captured the ink to a corona discharge.

Thereafter, recording signal light is irradiated onto the photoconductive material layer around the micropores while applying a voltage to the conductive core material. Recording is then performed in the same manner as in (A) using a counter electrode. ” A light emitting diode can be used as the light source of the recording signal light.

In addition, in order to apply a voltage to the ink carrier, for example, the fourth
As shown, transparent conductive electrodes or counter electrodes can be used.

Hereinafter, one embodiment of the present invention will be described with reference to the attached drawings.

As shown in FIG. 3, while applying a voltage to the conductive core material 1'', which is a component of the ink carrier 1, through the transparent conductive electrode 6, ink is captured in the ink carrying holes 2 of the ink carrier 1. The droplet 3 is irradiated with recording signal light R. This reduces the electrical resistance of the photoconductive material layer 1'' and injects charge into the ink droplet 3.

On the other hand, it is difficult to inject charges into the ink droplets 3 that have not been irradiated with the recording signal light R because the electrical resistance of the photoconductive material layer 1'' is high.

As shown in FIG. 4, if the ink carrier 1 irradiated with the recording signal light R is faced to the counter electrode 5 via the recording paper 4 and the electrode is applied between the ink carrier 1 and the counter electrode 5, recording can be performed. Ink droplet 3' injected with charge by irradiation with signal light R
is attracted to the counter electrode side and adheres to the recording paper 4. The ink droplets 3 to which no charge has been injected remain on the ink carrier 1 side while remaining trapped in the ink carrier holes 2. In this way, an image corresponding to the recording signal light can be formed on the recording paper 4.

Furthermore, if the entire surface of the ink carrier 1 impregnated with ink is uniformly charged by corona charging in a dark place and then the recording signal light R is irradiated, the ink in the part irradiated with the recording signal light R can be The charge on drop 3 disappears. Next, recording signal light R
Recording can be performed by transferring the ink droplets 3 that were not irradiated onto the recording paper 4.

Furthermore, as shown in FIGS. 5 and 6, the recording signal light R is applied while applying a voltage different from the polarity of the ink droplet 3 uniformly charged by corona discharge to the conductive core material 1° of the ink carrier 1. By irradiating, the ink droplet 3 in the area irradiated with the recording signal light R has the voltage applied to the conductive core material 1'',
As a result of the charge having the same polarity being injected, the ink droplet 3 is charged to have a polarity opposite to that of the ink droplet 3 that was not irradiated with the recording signal light R. Therefore, a negative image or a positive image can be easily formed by a simple operation of switching the polarity of the voltage applied to the counter electrode 5. Furthermore, according to this method, the S/N ratio of the image formed on the recording paper 4 is improved.

Hereinafter, the present invention will be described in detail with reference to Examples.

[Embodiments of the invention]

Example 1 A square piece of stainless steel with a side of lQcm and a thickness of 2011 m was subjected to a photo-etching process to form holes with a diameter of 60 μm at a rate of 12 holes per 1 mm.
[1i1-Drilled in a straight line. Next, an ink carrier was obtained by depositing a boron-containing amorphous silicon film on the front and back surfaces of the ink using a plasma CVD method to a thickness of 1 μm.

The obtained ink carrier was immersed in an ordinary water-soluble ink to capture the ink, and then placed on a recording paper provided on a counter electrode with an air layer of 100 μm in between in a dark box.

Next, while applying a DC voltage of 30'0 volts between the ink carrier and the counter electrode, 60 of the 120 holes in which ink was captured were irradiated with recording signal light. A light emitting diode was used as the light source.

After irradiation, the voltage applied between the ink carrier and the counter electrode was turned off, and the recording paper was taken out of the dark box.
Ink droplets corresponding to the recording signal light were deposited on the recording paper over a length of 5 mm, and recording was performed.

Note that the boron-containing hydrogenated amorphous silicon film, which was formed under the same conditions as the boron-containing hydrogenated amorphous silicon film used to manufacture this ink carrier, had a brightness of 1.
At 00 lux, it has a specific resistance of 6 x 10”Ω mark,
Specific resistance when no light is irradiated is 2.4 x 1
It was 0'Ωcm.

Example 2 In the same manner as in Example 1, hydrogenated amorphous silicon was deposited on the front and back surfaces of a 400 mesh stainless steel wire mesh using plasma CVD to obtain an ink carrier. After the ink carrier was immersed in water-soluble ink to capture the ink, it was placed on a recording paper placed on a counter electrode with an air layer of 150 μm in between in a dark box, and between a stainless steel wire mesh and a counter electrode. Image exposure was performed on the ink carrier while applying a voltage of 500 volts. A light emitting diode was used as the light source.

As a result, a positive image of ink droplets was formed on the recording paper.

Example 3 The ink carrier used in Example 2 was immersed in water-based ink to capture the ink, and then 150 μm thick was prepared in a dark box.
A negative corona discharge is applied to the ink droplets on the ink carrier from the opposite side facing the recording paper of the ink carrier while the ink carrier is placed on the recording paper provided on the counter electrode through an air layer. gave a negative charge.

Thereafter, the ink carrier was irradiated with recording signal light while applying a voltage of plus 20 volts to the stainless wire mesh of the ink carrier with reference to the ground potential. A light emitting diode was used as the light source.

After the irradiation, a voltage of plus 500 volts was applied to the counter electrode, and a negative image was formed on the recording paper.

Example 4 The 4,00 mesh stainless steel wire mesh used in Examples 2 and 3 was cut into strips with a width of 100 mm and a length of 500 mm, and both ends were spot welded.
Formed an endless held. The same photoconductive film as in Example 2 was deposited on the front and back surfaces of this heald to obtain an ink carrier.

Using this heald-shaped ink carrier, a recording apparatus shown in FIG. 7 was constructed.

The belt-shaped ink carrier 1 of this apparatus is provided with a light-shielding casing (not shown) that covers the entire body and prevents light other than the recording signal light from being irradiated. L for scanning and exposing the recording signal light to the ink droplets 3 of
An ED array 17 and a lens 16 for image exposure using reflected light from a copy original are provided.

By bringing the ink carrier 1 arranged in this way into contact with an ink roll 7 impregnated with water-soluble ink 8 stored in an ink container 9, ink droplets 3. was captured, and after irradiating the recording signal light at the position R, the ink droplet 3 was transferred onto the recording paper 4 at the ink transfer section T.

In this recording apparatus, as shown in the figure, a voltage of +10 volts was applied to the stainless steel wire mesh constituting the ink carrier 1 with reference to the ground potential. Further, while a voltage of +500 volts is applied to the transfer roller 5, a negative charge is injected into the ink droplets from the corona charger 13, and when the reflected light from the copy document is exposed as an image, a positive image of the copy document is formed on the recording paper 4. was formed. +10 bolts for stainless wire mesh, +5 bolts for transfer roller
While applying 00 volts, the corona charger 13
When a positive charge was injected into the ink droplets and exposed to the reflected light from the copy document, a negative image of the document was formed on the recording paper.

Furthermore, in order to supply power to the stainless steel wire mesh constituting the ink carrier 1 of the recording apparatus shown in FIG. A method was used in which power was supplied by pressing a conductive roller into contact with this portion. However, even when a photoconductive film is provided on the entire surface of a belt-shaped stainless steel wire mesh, the parts where the ink liquid surface and the ink carrier come into contact, for example, in FIG. By irradiating light onto the portions of , H, the electrical resistance of the photoconductive material layer is reduced, and the potential of the stainless wire mesh can be adjusted to approximately the same level as when applied to the ink container 9, allowing recording operation. It was confirmed that

〔Effect of the invention〕

As explained above, according to the recording method of the present invention, there is no need to use special ink such as magnetic ink.
Free selection of ink color is possible.

Further, since an ink carrier having a large number of micropores is used, even if a small number of micropores become clogged, the recording obtained is clear. Furthermore, since ink droplets in the micropores can be easily removed, ink solidification, which is the main cause of ink clogging, can be prevented, and a highly reliable recording bag placement can be provided. In addition, 6 recording methods that control the charge of ink droplets using optical signals and control the flight of ink droplets - r, s 6-) A thermal recording head is brought into contact with an ink carrier having a large number of fine holes 4. There is no risk that the ink carrier will wear out compared to the conventional technique in which the ink carrier is moved.

[Brief explanation of drawings]

FIG. 1(A) is a schematic diagram showing an example of an ink carrier used in the recording method of the present invention. FIG. 1(b) is a schematic cross-sectional view taken along the line AA' shown in FIG. 1(a). FIG. 2 is a schematic diagram showing a state in which an ink carrier is impregnated with ink. FIG. 3 is a diagram for explaining one embodiment of the present invention, and is a schematic diagram showing a state in which ink droplets are selectively charged by irradiation with an optical signal. FIG. 4 is a schematic diagram showing a state in which selectively charged ink droplets are transferred to the recording paper side. Figure 5 shows that after the ink droplets are uniformly charged to a certain polarity,
FIG. 3 is a schematic diagram showing a state in which charges of opposite polarity are selectively injected by an optical signal. FIG. 6 is a schematic diagram showing a state in which selected ink droplets are transferred to the recording paper side. FIG. 7 is a schematic diagram showing an example in which the recording method of the present invention is applied to a copying machine/optical printer. Procedural amendment August 1985 Michibe Uga, Commissioner of the Patent Office1, Indication of the case Patent Application No. 141563 of 19852, Method of recording the name of the invention3, Person making the amendment Relationship with the case Patent applicant Name (307) Toshiba Corporation 4, Agent 5, Date of amendment order Voluntary '''・-m-/' ■, Claims column amended as shown in the attached sheet. II, Detailed description of the invention column ( 1) Page 9, line 20 of the specification and page 11, line 8 of the specification
"Conductive core material 1'" written in the 1st and 11th lines is corrected to "conductive core material 1". (2) "Photoconductive material layer l" described in lines 3 and 7 of page 10 of the specification is corrected to "photoconductive material layer 1'J." ■In the 9th drawing, Figure 1 (b) has been corrected as shown in the attached sheet. Claims: After ink is trapped in the fine pores of an ink carrier consisting of a conductive core material having a large number of micropores and a photoconductive material layer formed on the surface thereof, electricity is supplied to the ink carrier. The recording signal light is irradiated while the ink carrier is exposed to corona discharge, or the recording signal light is irradiated after the ink carrier is exposed to corona discharge.
A recording method characterized in that the ink captured on the ink carrier is moved from the ink carrier to the recording paper side by an electric field in response to irradiated recording signal light.

Claims (1)

[Claims] After the ink is captured in the micropores of the ink carrier, which is made of a conductive core material having many micropores and a photoconductive material layer formed on the surface thereof, a recording signal light is emitted while supplying power to the ink carrier. The ink carrier is irradiated with a recording signal light after being exposed to a corona discharge, and then the ink captured on the ink carrier is irradiated with a recording signal light. A recording method characterized by moving from the paper to the recording paper side using an electric field.