JPH01186349A - Color recording apparatus - Google Patents

Abstract

PURPOSE:To form a color image having high image quality by a method wherein transferred ink is reversely re-transferred to an ink transfer means by making it possible to apply electric energy to the ink pattern on a second intermediate transfer roll from a temporary fixing means. CONSTITUTION:A temporary fixing means 10 composed of a cylindrical member is arranged on a second intermediate transfer roll 7 so as to provide a definite gap from the surface of said roll 7 and the surface thereof is composed of a conductive material and said means 10 is constituted so as to be capable of supplying a current through the flowable ink 1 between the means 10 and the second intermediate transfer roll 7. The ink pattern 21 transferred to the first intermediate transfer roll 5 is again transferred to the second intermediate transfer roll 7 provided in a rotatable manner in the direction shown by an arrow (c) in the state brought into contact with the roll 5 under pressure and stickiness is removed from the surface of the transferred ink pattern 22 by electric energy having polarity opposite to that at the time of the formation of an image applied between the temporary fixing roll 10 and the intermediate transfer roll 7. Subsequently, the ink pattern 22 is rotated in the direction shown by the arrow (c) and again transferred to the first ink image transfer position where the roll 5 and the roll 7 are brought into contact with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a recording apparatus capable of performing color recording on a recording medium at low cost using fluid ink.

BACKGROUND ART Today, among color recording systems, various formats have been developed that can record on plain paper, such as electrophotography, laser beam printers, and thermal transfer printers.

Among these, thermal transfer type recording devices are widely used as color recording devices because they have low noise and can be miniaturized. In this recording method, a heat-melting ink is coated on a base sheet. Three or four types of ink ribbons (yellow, magenta, cyan, and black) are used, each ink ribbon is heated in an image pattern by a recording head, and the molten ink is transferred to recording paper, making it a low-noise system. This has the advantage that it is possible to make a relatively small device, and the cost of the device can be reduced. However, on the other hand, when manufacturing ink ribbons, m
1 Heat-melting ink must be applied to the heated base sheet in a complicated process, and the ink ribbon is only used for one recording and must be disposed of, leading to high running costs. There were drawbacks.

The present applicant has previously developed a new recording method in which fluid ink is transferred in the form of a film using an ink transfer device, and a predetermined energy is selectively applied to this ink to form an adhesive pattern in an image pattern. A recording apparatus has been proposed that forms an applied ink image and transfers this ink image onto a recording medium. (Patent Application No. 175191/1982). With this recording device, there is no need to use an ink ribbon as in conventional thermal transfer methods, and only the ink that forms an ink image is sequentially transferred to the recording medium, and the ink that does not form an ink image is repeatedly used. This enables low-cost recording.

When adapting such a recording method to color recording, it is usually necessary to overwrite three or four colors, but it is necessary to temporarily form a color image between the recording medium and the ink transport means. In an embodiment in which an intermediate transfer roll is provided, the ink pattern already transferred to the intermediate transfer roll is transferred to the ink transfer position where ink of another color is to be transferred based on the tackiness of the ink transferred to the intermediate transfer roll. On the other hand, there is a possibility that the ink of another color is re-transferred to the ink 6 feeding means side.

OBJECTS OF THE INVENTION An object of the present invention is to - produce a high quality color image without the ink that has been transferred to the intermediate transfer roll being re-transferred to the ink 8 feeding means side at the transfer position of ink of another color; An object of the present invention is to provide a recording device that can be configured.

SUMMARY OF THE INVENTION As a result of intensive research, the present inventors have found that the above object can be achieved by further applying electric energy to an ink pattern made of fluid ink that has been transferred to an intermediate transfer roll to temporarily adhere the ink pattern. found that it is extremely effective.

The color recording device of the present invention is based on the above knowledge,
More specifically, it includes a plurality of ink transport means for transporting fluid ink arranged along each color ink transfer position, and an energy application capable of selectively applying energy to the fluid ink transported by the ink transport means. and a first fluid ink which is moved in contact with the ink layer formed on the ink transport means at an ink transfer position and which is capable of transferring a fluid ink whose transfer characteristics have been changed by the selective application of the energy. an intermediate transfer roll, and a second intermediate transfer roll that is moved so as to be in contact with the first intermediate transfer roll and that enables transfer of the fluid ink on the first intermediate transfer roll.
an intermediate transfer roll; a temporary adhesion means for temporarily adhering the ink transferred to the second intermediate transfer roll; a control means for sequentially transferring a pattern made of each color ink onto the second intermediate transfer roll; A color recording apparatus comprising a transfer means for transferring a pattern made of a plurality of inks formed on a second intermediate transfer roll onto a recording medium, the color recording apparatus comprising: a transfer means for transferring a pattern formed on a second intermediate transfer roll onto a second intermediate transfer roll; The invention is characterized in that the ink can be applied to the ink pattern.

Hereinafter, the present invention will be explained in more detail by way of examples, with reference to the drawings as necessary.

Embodiments Embodiment 1 First, the overall general structure will be described with reference to FIG. 1, which is a schematic cross-sectional view in the thickness direction of a recording medium of a color recording apparatus according to a first embodiment of the present invention.

Referring to FIG. 1, since A, B, C, and D are similar image forming means, common numbers are used for the members constituting these, and each la
, macenta (M) 1b, cyan (C) lc, and black (B) ld.

In one image forming means A, an ink transport roll 2a serving as an ink transport means whose surface is made of stainless steel or the like,
Ink coating means 3 holding fluid ink 1a
It is arranged on the left side of the arrow a (on the side of the ink reservoir 4a where the ink 1a of the ink coating means 3a is stored) so as to be rotatable in the direction of the arrow a (clockwise) while transferring the ink 1a.

At the ink transfer position, a cylindrical shape whose surface is made of stainless steel or the like is placed on the lower side of the drawing of the ink transfer roll 2a (on the surface or ink carrying surface side of the ink transfer roll 2a), facing the roll 2a with a certain gap. A first intermediate transfer roll 5 is disposed therein and is rotatable in the direction indicated by the arrow. This first intermediate transfer roll 5 has a surface that transfers the fluid ink 1 formed on the surface of the ink transport roll 2a.
It is arranged so as to be able to contact the layer a.

Further, energy is applied according to the image signal to the surface of the ink transfer roll 2a on the upstream side of the ink transfer position where the ink transfer roll 2a and the first intermediate transfer roll 5 face each other, with a certain gap from this surface. Recording electrode 6a as means
is placed. The tip of the recording electrode 6a (one end where an electrode element is formed) is arranged so as to be able to come into contact with the ink layer 1a on the surface of the ink transport roll 28.

On the other hand, at a first ink image transfer position downstream of the ink transfer position of the first intermediate transfer roll 5 in the transport direction of the first intermediate transfer roll 5, a cylindrical second intermediate transfer roll whose surface is made of stainless steel or the like is provided. 7 is arranged so as to be rotatable in the direction of arrow C while being in contact with the surface of the first intermediate transfer roll 5 .

Further, at a second ink image transfer position downstream of the first ink image transfer position in the transport direction of the second intermediate transfer roll 7, the surface (ink image forming surface) of the second intermediate transfer roll 7 is
A recording medium 8 made of plain paper or the like and transported in the direction of the sign d is placed in contact with the surface. Further, there is a platen roll 9, which is a transfer means, which faces the second intermediate transfer roll 7 so that the recording medium 8 can be held therebetween, has a surface made of silicone rubber, etc., and rotates in the direction of arrow e. Placed.

On the second intermediate transfer roll 7 downstream of the second ink image transfer position where the second intermediate transfer roll 7 and the platen roll 9 face each other, a certain gap is provided between the second intermediate transfer roll 7 and the surface of the second intermediate transfer roll 7. Temporary attachment means 10 made of a cylindrical member is arranged. The surface of the temporary adhesion means 10 is made of a conductive material such as stainless steel, and is configured to enable desired electrical conduction between the temporary adhesion means 10 and the second intermediate transfer roll 7 via the fluid ink 1.

On the surface side of the first intermediate transfer roll 5 on the upstream side in the transport direction of the first intermediate transfer roll 5 from the image forming means A described above, an image having the same configuration as the image forming means A described above is formed according to the desired ink tone. Forming means B, C1 and D are arranged respectively.

In the color recording apparatus shown in FIG. 1 having the basic configuration as described above, the first intermediate transfer roll 5 and the second intermediate transfer roll 7 are located downstream of the first ink image transfer position where the first intermediate transfer roll 5 and the second intermediate transfer roll 7 face each other. It is provided on the roll 5 so as to be able to come into contact with the surface of the first intermediate transfer roll 5. A cleaning means 11 having a blade 11a made of urethane rubber or the like is arranged as necessary. Further, on the second intermediate transfer roll 7 on the downstream side of the second ink image transfer position where the second intermediate transfer roll 7 and the platen roll 9 face each other, a second intermediate transfer roll 7 is provided so as to be able to come into contact with the surface of the second intermediate transfer roll 7. A cleaning means 12 having a blade 12a made of urethane rubber or the like is arranged as necessary.

Although the configuration of the image recording apparatus of the present invention is the same as described above, the operation of such an apparatus system will be explained next.

Referring to FIG. 1, fluid ink 1a in ink reservoir 4a
As described below, it has fluid film-forming properties and is substantially non-adhesive under normal conditions, but with a predetermined energy,
For example, an ink that has a property of becoming sticky when electrical energy or the like is applied is used. Therefore, when electrical energy is applied to the ink 1a in an image pattern from the recording electrode 6a, which is an energy application means, selective tackiness is imparted to the ink 1a by this application of energy. The selectively adhesive ink 1a then comes into contact with the first intermediate transfer roll 5 rotating in the direction of the arrow (counterclockwise) and is transferred onto the surface of the roll 5, forming an ink pattern 21.
form.

On the other hand, the ink 1a that has not been transferred to the first intermediate transfer roll 5 is reaccommodated in the ink reservoir 4a as the ink transfer roll 2a rotates in the direction of arrow a, and is stirred and mixed within the ink reservoir 4a. Subject to reuse.

The above description is common to image forming means A, B, C1, and D. Next, the operation of the color recording apparatus will be described.

First, as described above, the image forming means A prints the yellow ink 1a in the first ink based on the yellow image information.
The yellow ink pattern 21 is then transferred to the intermediate transfer roll 5 . At this time, image forming means B, C,
The ink surface of D is separated from the intermediate transfer roll 5 by mechanical means or the like. On the other hand, the ink pattern 21 transferred to the first intermediate transfer roll 5 is placed in a first ink image transfer position on a second intermediate transfer roll 5, which is provided in pressure contact with the first intermediate transfer roll 5 and is rotatable in the direction of arrow C (clockwise). The image is transferred again to the intermediate transfer roll 7 of No. 2. Further, the ink pattern 22 transferred to the second intermediate transfer roll 7 is transferred to the temporary deposition roll 1.
The tackiness is removed from the surface of the ink by electrical energy having a polarity opposite to that during image formation, which is applied between the ink and the second intermediate transfer roll 7. Next, the ink pattern 22 is rotated as it is on the second intermediate transfer roll 7 in the direction of arrow C, and returns to the first ink image transfer position where the first intermediate transfer roll 5 and the second intermediate transfer roll 7 are in contact with each other again. be transported to. At this time, the planar roll 9 and the cleaning means 12 are separated from the second intermediate transfer roll 7 by mechanical means or the like. Further, after the ink pattern 22 is transferred to the second intermediate transfer roll 7, a small amount of ink remaining on the surface of the first intermediate transfer roll 5 is removed by the cleaning means 11.

When the image forming means A completes the image formation of the yellow portion, the image forming means B replaces the image forming means A, contacts the first intermediate transfer roll 5, and transfers the image onto the second intermediate transfer roll 7 first. The leading edge of the yellow image formed on the first intermediate transfer roll 5 and the leading edge of the magenta image formed on the first intermediate transfer roll 5 by the image forming means B are connected to each other when the first and second intermediate transfer rolls contact each other. Creation of a magenta image is started so as to match (that is, match the registration) at one ink image transfer position.

At the first ink image transfer position, the ink pattern 22 temporarily deposited on the second intermediate transfer roll 7 is not disturbed, and a magenta image is formed on the first intermediate transfer roll 5 in the same manner as described above. is transferred onto the second intermediate transfer roll 7, overlapping with the previously formed yellow image 22. Similar to the yellow image, this magenta image is also temporarily adhered onto the second intermediate transfer roll 7 after the adhesiveness on its surface is removed by electric energy applied from the temporary fixing roll 10 .

Thereafter, similarly, images are sequentially formed using the cyan ink IC and the black ink 1d by the image forming means C and D, and a full-color ink pattern is formed on the second intermediate transfer roll 7.

Next, the recording medium 8 is guided by the conveyance means 13 so that the leading edge of this full-color ink pattern and the leading edge of the recording medium 8 (made of plain paper, plastic sheet, etc., for example) coincide with each other. At this time, the platen roll 9 is
This transfer means is provided in pressure contact with the second intermediate transfer roll 7 and is rotatable in the direction of arrow e. At this second ink image transfer position, the full-color ink pattern formed on the second intermediate transfer roll 7 is transferred to the recording medium 8 by the pressure between the mouth luer 9 and the full-color transfer record. An image 23 is formed. The recording medium 8 on which the transferred recorded image has been formed in this manner is discharged in the direction of arrow d by the discharge roll 14.

Further, a small amount of ink remaining on the second intermediate roll 7 is removed by the cleaning means 12.

Next, the configuration of each part of the recording apparatus will be explained in detail.

The ink transport roll 2 is made of a material capable of transporting the fluid ink 1, which will be described later, by forming a film on its surface. Those having a cylindrical body are preferably used. This ink transfer roll 2
is configured to be driven and rotated at a constant speed in the direction of arrow a by a driving means (not shown).

The surface of the ink transfer roll 2 made of the above-mentioned material may be a smooth surface, but in order to further improve the transferability of the fluid ink 1, it is preferable that the surface be appropriately roughened.

Next, the fluid ink 1 transported by the ink transport roll 2 will be explained. This ink 1 has a fluid film-forming property that flows under the application of a certain external force to form an ink film. More specifically, as the ink transport roll 2 rotates, an ink layer is formed on the surface of the roll 2 and is transported. Further, it is preferable to use an ink 1 that has a property of being able to restore its adhesiveness over time after being cut by an external force. That is, it is preferable that the ink particles have such a property that when the ink particles come into contact with each other, the interface disappears and they become one.

The ink 1 having such properties is an ink having a gel state in a broad sense in which the solvent is held by a crosslinked structure substance, or an ink having a relatively high viscosity (preferably 5000 cps or more) in which particles (the particle size is preferably is 0.1~10
An ink having a sludge state in which particles (0 μm, more preferably 1 to 20 μm) are dispersed is preferably used.

Inks having properties of both gel-like inks and sludge-like inks are more preferably used.

As a specific example of this first ink, for example, Japanese Patent Application No. 175191/1989 filed by the applicant of the present invention or Japanese Patent Application No. 175191/1982 filed earlier by the applicant
The inks described in No. 36904 and the like are preferred.

Such an ink 1 has fluid film-forming properties, but is substantially sticky and becomes sticky when a predetermined energy (for example, electrical energy, thermal energy, etc.) is applied. have a property. Note that the term "adhesiveness" used herein refers to selective adhesiveness. When ink 1 is brought into contact with an object such as the first intermediate transfer roll 5, a part of ink 1 separates from the entire ink and adheres to the object, regardless of whether the entire ink is sticky or not. .

Therefore, in the ink layer formed on the surface of the ink transport roll 2, in a state where no energy is applied, even if the ink 1 comes into contact with another medium, for example, the intermediate transfer roll 5, the intermediate transfer roll 5 is not substantially transferred. This is considered to be because the gel-like ink is not transferred to the intermediate transfer roll 5 because the solvent is held in a crosslinked structure (except for a small amount of the solvent). In addition, in the case of ink in a sludge state, it is thought that because the particles are closely arranged at the interface, the solvent portion of the ink becomes difficult to come into contact with the intermediate transfer roll 5 and is not transferred to the intermediate transfer roll 5.

On the other hand, when energy is applied to the gel-like ink or sludge-like ink, the crosslinking structure of the gel-like ink and the particle arrangement state of the sludge-like ink change. It is thought that these fluid inks are given tackiness in accordance with the application of energy.

Furthermore, when the ink 1 is coated on the ink transfer roll 2, it has properties as a plastic body, and conversely, after it is applied with energy by the energy application means 6, it becomes an elastic body after it is applied to the intermediate transfer roll 5. It is preferable to have the following properties.

Therefore, as the ink 1 used in this example, one having a certain degree of viscoelasticity (complex elasticity having an elastic term and a viscous term) is preferably used.

Ink colorants suitably used in the present invention include the following dyes and pigments, which may be used singly or in combination of two or more. These pigments or dyes are
It is preferred to use a sufficient amount so that the ink is highly pigmented and forms a clear visible image. The dye/pigment is preferably used in an amount of about 1% to 40% by weight of the total weight of the ink in the case of a pigment, but in the case of a dye, it is used in a substantially lower amount, such as 30% by weight or less. It is preferable to use it in

(Black coloring agent) Carbon black, magnetite, iron oxide, nigrosine dye, chrome yellow, ultramarine blue, DuPont oilet, methylene blue chloride, phthalocyanine blue, etc.

(Colorant for magenta) 2.9-dimethyl-substituted quinacridone and anthraquinone dye listed as CI 607' 10 in the Color Index, CI Disverse Dread 15, diazo dye listed as Cl26050 in the Color Index, Cl Solvent Red 19 etc.

(Colorant for cyan) Copper tetra-4 (octadecylsulfonamide) phthalocyanine, X-copper phthalocyanine pigment listed as Cl74160 in the Color Index, CI Pigment Blue, and Cl6981 in the Color Index
0 and Special Blue X-2137.

(Coloring agent for yellow) 3,3-dichloropenzidine acetoacetanilide, which is cyanilide yellow, has C in the color index.
Monoazo pigment described as I 12700,'
CI Solvent Yellow 16, Nitrophenylamine Sulfonamide, listed in the Color Index as Hollon Yellow 6 E/G L N, CI Dissolved Yellow 33. 2,5-Dimethoxy-4-sulfonanilide, Phenyl- 4'-chloro-2,5-
Dimethoxyacetoacetanilide, permanent yellow FGL, etc.

Next, the energy applying means 6 may be explained. Although thermal energy may be applied using a conventional thermal head, from the point of view of energy efficiency, a recording electrode is used as in this embodiment to apply electrical energy. It is preferable to apply it.

As shown in the partial schematic perspective view of FIG. 2, the recording electrode 6 has a structure in which a plurality of electrode elements 62 made of metal such as copper are arranged in a line on a base 61 made of glass, epoxy, alumina, glass, etc. An insulating film 63 made of polyimide or the like is provided on a portion of the electrode element 62 other than the tip, that is, a portion other than the portion that contacts the ink 1.

In the present embodiment, the ink transport roll 2 is grounded so that current can be passed between the roll 2 and the electrode element 62 via the ink 1. The portion of the electrode element 62 exposed from the insulating film 63 is preferably plated with gold, platinum, rhodium, or the like, and from the viewpoint of durability, platinum plating is more preferable.

Next, as the material constituting the surface of the first intermediate transfer roll 50, it is possible to use the same material as the material forming the surface of the ink transfer roll 2;
The surface of the intermediate transfer roll 5 may be plated with chrome plating or the like, or coated with silicone resin, fluororesin, polyethylene resin, etc. to improve smoothness, stain resistance, or ease of cleaning. is preferred. Further, in order to improve the transferability of the ink 1 at the ink transfer position, it is preferable that the surface of the first intermediate transfer roll 5 is made smoother than the surface of the ink transfer roll 2.

Next, the second intermediate transfer roll 7 is made of a cylindrical conductor made of metal such as stainless steel, aluminum, or iron, and is configured to be driven and rotated at a constant speed in the direction of arrow C by a driving means (not shown). are doing. Further, this second intermediate transfer roll 7 is grounded.

As with the first intermediate transfer roll 5, it is preferable that the surface of the second intermediate transfer roll 7 has high smoothness.

The temporary adhesion roll 10 is a cylindrical conductor made of a metal such as stainless steel or aluminum, and is supported at a surface distance of approximately the thickness of the ink from the second intermediate transfer roll 7. 7, it is configured to be rotatable in the direction of arrow f by a driving means (not shown).

A preferred mode of temporarily adhering the ink pattern 22 is shown in the partial schematic sectional view of FIG. Referring to FIG. 3, the ink pattern 22 transferred onto the second intermediate transfer roll 7 includes:
Between the temporary fixing roll 1o and the second intermediate transfer roll 7,
A voltage opposite to the voltage applied from the recording electrode 6 during image formation (
When a bias voltage (hereinafter referred to as "bias voltage") is applied, an electrochemical reaction occurs in the sticky ink pattern 22, and the surface of the ink (the shaded area in FIG. 3) returns to a non-sticky gel state. The ink on the second intermediate transfer roll 7 side remains in a sticky sol state, and the ink remains on the temporary adhesion roll 10.
Since the ink on the side is in a non-adhesive state, the ink pattern 22 is temporarily deposited on the second intermediate transfer roll 7 without being transferred to the temporary deposition roll 10.

Next, referring to FIG. 1, the platen 9 constitutes a transfer means for transferring the ink pattern 22 transferred and formed on the second intermediate transfer roll 7 to the recording medium 8. As this platen, it is preferable to use a platen roll 7 made of nitrile rubber, silicone rubber, or the like formed into a cylindrical shape on a metal shaft. In this embodiment, such a platen roll 9 is pressed against the second intermediate transfer roll 7 by a spring or the like (not shown) with a pressing force of preferably about 0.1 to 5 gf/cm, and the intermediate transfer By rotating the roll 7 in the direction of the arrow e, the recording medium 8 is conveyed in the direction of the arrow d by cooperation with the intermediate transfer roll 7, and the recording medium 8 formed on the intermediate transfer roll 7 is conveyed in the direction of the arrow d. It is configured to transfer the ink pattern 22 onto the recording medium 8.

Next, FIG. 4 shows an electrical block diagram of the recording apparatus of the present invention. The sequence control means 100 is a central part of the control of this apparatus, and manages the sequence operation of this apparatus using a microcomputer or the like.

The color image data 101 is image data stored in the memory of a computer or a signal read directly from a color image reader, and is transmitted to the sequence control unit 10.
According to the request of 'O, data of the corresponding color is transferred to the electrode drive circuit section 102.

The electrode drive circuit unit 102 drives the data sent from the color image data 101 to the electrode of the specified color according to the color instruction from the sequence control unit. The ink roll drive control unit 103 controls the rotation of the ink roll 2 and image formation in each image forming means by contacting and separating the selected image forming means and the first intermediate transfer roll 5. Intermediate transfer roll drive control 10
4, first and second intermediate transfer rolls and temporary fixing roll 1;
0 rotation control is performed, and the temporary bonding roll voltage application section 105
is the bias voltage C applied to the temporary deposition roll 10
Performs AN10FF control and voltage control. The platen roll control unit 106 is a part that controls whether the platen roll 9 and the cleaning means 12 are in pressure contact with the second intermediate transfer roll 7 or not.

Example 2 (Temporary Transfer Roll) In the above-mentioned Example 1, the surface of the temporary transfer roller 10 was conductive and conductive, but depending on the ink thickness, the temporary transfer roller 1o and the second intermediate transfer roller 10 were used. It may be difficult to maintain the gap between the roll 7 and the roll 7 with high precision. When these two rolls are brought into pressure contact, a short circuit will occur between the metal rolls, so as shown in the partial schematic cross-sectional view of FIG. 5, a conductive rubber 15 having internal resistance is formed on the metal roll 16. Assuming that the roll is 1o,
Preferably, a bias voltage is applied to the metal roll 16.

The conductive rubber 15 at this time is preferably anisotropic, with high resistance in the direction parallel to the rotation axis of the temporary fixing roll 1° and low resistance in the radial direction from the rotation axis to the outer peripheral surface of the roll 10. . Such an anisotropic conductive rubber roller is made by, for example, alternately stacking thin disc-shaped conductive rubber (for example, about 1 layer thick) and an insulating material (for example, PET (polyethylene terephthalate) about 10 μm thick). It may also be something like a roller.

Referring to FIG. 5, by configuring the temporary fixing roll 1o in this way, an electric current flows through the conductive rubber roll 15 in the ink pattern 22 portion, an electrochemical reaction occurs, and the surface of the ink pattern 22 is Gel. On the other hand, in the part where there is no ink pattern, the conductive part of the second intermediate transfer roll 7 and the conductive rubber 15 come into contact with each other.
The internal resistance of the conductive rubber 15 prevents short circuits. Furthermore, as described above, by imparting anisotropy to the conductive rubber, the temporary bonding roll 10 in the area where there is no image is
The decrease in surface potential due to pressure contact can be suppressed.

As described above, according to this embodiment, the configuration of the temporary bonding roll portion can be simplified, and appropriate pressure can be applied as necessary during temporary bonding.

Example 3 (temporary deposition roll) In order to increase the conductive anisotropy in Example 2 and to reduce the drop in potential at the interface between the ink image area and the ink-free area in both the axis-parallel direction and the circumferential direction, the sixth As shown in the partial schematic sectional view of the figure, a layer of conductive rubber 17 was provided on the metal roll 16, and a conductive rubber 18 having conductive anisotropy in the radial direction was further provided on the outermost periphery. The conductive rubber 18 has conductive fibers arranged in the thickness direction (radial direction) of the insulating rubber, and is conductive in the radial direction and insulating in the surface direction. The internal conductive rubber 17 may be a general one, but the anisotropic conductive rubber 15 shown in Example 2 may be used.
The anisotropy may be further increased by combining with.

Embodiment 4 (Voltage application to the temporary fixing roll) In the above-mentioned Example 1, the voltage applied to the temporary fixing roll 1° for each ink pattern of yellow, fugenta, cyan, and black on the second intermediate transfer roll 7 was A constant voltage was used for application, but as the ink layer becomes thicker, the applied voltage is increased to make the current flowing to the inner and outer parts uniform for each color, thereby increasing the assumed adhesion on the surface of each color ink. The gender may be uniform.

Effects of the Invention As described above, according to the color recording apparatus of the present invention, an ink pattern is formed by applying a predetermined energy corresponding to each fluid ink of a plurality of colors (for example, four colors?), and a second A color recorded image is obtained by overlapping ink patterns of each color on an intermediate transfer roll and further transferring them to a recording medium.At this time, one layer of ink is transferred onto a second intermediate transfer roll. By performing temporary adhesion to remove the tackiness of the surface of the tacky ink, a high-quality color recorded image without image distortion can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a schematic side sectional view in the thickness direction of a recording medium showing an embodiment of the color recording device of the present invention, and FIG. 2 is a partial schematic perspective view showing an example of the configuration of recording electrodes used in the above device. , FIG. 3 is a partial schematic sectional view showing one aspect of the temporary attachment means, FIG. 4 is a control block diagram of the recording apparatus, and FIGS. 5 and 6 are partial schematic diagrams showing other configurations of the temporary attachment means. FIG. 1...Fluid ink 2...Ink transport roll 3...Coating means 4...Ink reservoir 5...First intermediate transfer roll 6...Energy application means 7...Second Intermediate transfer roll 8... Recording medium 9... Platen 10... Temporary attachment means 11.12... Cleaning means 13.14... Conveyance means 15.17... Conductive rubber 16...・Metal roll 18...Representative diagram of conductive anisotropic fiber: Figure 1

Claims (1)

[Claims] A plurality of ink transport means for transporting fluid ink arranged along ink transfer positions of each color, and selective application of energy to the fluid ink transported by the ink transport means. and an energy applying means that is moved so as to be able to contact the ink layer formed on the ink transfer means at the ink transfer position, and the fluid ink whose transfer characteristics have been changed by the selective application of the energy can be transferred. a first intermediate transfer roll; and a second intermediate transfer roll that is moved so as to be in contact with the first intermediate transfer roll and that enables transfer of the fluid ink on the first intermediate transfer roll.
an intermediate transfer roll; a temporary attachment means for temporarily attaching the ink transferred to the second intermediate transfer roll; a control means for sequentially transferring a pattern made of each color ink onto the second intermediate transfer roll; A color recording apparatus comprising a transfer means for transferring a pattern made of a plurality of inks formed on a second intermediate transfer roll onto a recording medium, the color recording apparatus comprising: a transfer means for transferring a pattern formed on a second intermediate transfer roll onto a second intermediate transfer roll; A color recording device characterized in that it is possible to apply an ink to the ink pattern.