JPH04330463A - Method and device for recording - Google Patents

Abstract

PURPOSE:To accomplish three-color(triple) recording in a short time with high quality. CONSTITUTION:The latent images of three different systems, that means, an electrostatic latent image electrostatically charged to positive, an electrostatic latent image electrostatically charged to negative, and a magnetic latent image are simultaneously formed on a latent image carrier 1 provided with a magnetic latent image forming part 1a and a dielectric part 1b, and the three kinds of latent images are developed and transferred on a recording medium 10.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording method and a recording apparatus.

0002

2. Description of the Related Art In a recording device that forms a latent image, visualizes the latent image using a liquid, capsule or powder developer, and transfers the developer onto a recording medium, a multicolor ( multiplex)
Various methods have been disclosed for performing recording.

For example, a plurality of developing means having different colors of developers are provided, and a latent image corresponding to the color of one of the plurality of developing means is formed, and the latent image is visualized by the developing means. It is imaged and transferred to a recording medium, then that latent image is erased to form a latent image corresponding to the color of the next developing means, visualized by that developing means, and transferred to the recording medium. There are cases where multicolor (multiple) recording is performed by repeating this process.

[0004] Furthermore, a plurality of developing means having different colors of developer are provided, and a latent image corresponding to the color of one of the plurality of developing means is formed, and the latent image is formed by the developing means. The latent image is visualized, then the latent image is erased, and a latent image corresponding to the color of the next developing means is formed on the latent image carrier, and the latent image is visualized by that developing means. In some cases, after all colors have been repeatedly developed, they are transferred all at once to a recording medium to perform multicolor (multiple) recording (
For example, Japanese Unexamined Patent Publication No. 158475/1983).

[0005]

[Problem to be solved by the invention] However, each time the former latent image is visualized, it is transferred to a recording medium and multicolored (multiple)
When performing recording, there is a problem in that it is difficult to align the recording medium during each transfer, and the recording quality deteriorates due to pixel misalignment.

[0006] In addition, in the case where the latter latent image is first visualized for all colors and then transferred all at once, after the latent image is visualized, that latent image is removed and the next latent image is created. Therefore, there is a problem in that the adhesion force of the developer adhering to the latent image on the latent image carrier becomes insufficient and the developer easily peels off.

Furthermore, in both cases, the latent image carrier must be moved once each time one latent image is formed.
There was a problem in that it took a long time to record.

SUMMARY OF THE INVENTION An object of the present invention is to provide a recording method and a recording apparatus that solve these problems.

[0009]

[Means for Solving the Problems] In order to achieve the above object, the recording method of the present invention provides an electrostatic latent image positively charged on a latent image carrier having a dielectric portion and a magnetic latent image forming portion. Forms a negatively charged electrostatic latent image and a magnetic latent image, develops the positively charged electrostatic latent image, negatively charged electrostatic latent image and magnetic latent image, and records the developed image. Transfer to media.

In order to achieve the above object, the recording apparatus of the present invention includes a latent image carrier having a dielectric layer and a magnetic latent image forming layer below the dielectric layer, and generating positively charged charged particles. a first ion flow recording head, a second ion flow recording head that generates negatively charged charged particles, a magnetic latent image writing means, and a first ion flow recording head that develops a positively charged electrostatic latent image. It has a developing means, a second developing means for developing a negatively charged electrostatic latent image, and a third developing means for developing a magnetic latent image.

[0011] The first developing means, the second developing means and the third developing means
The developing means may be a liquid developing means.

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

In FIG. 1, a latent image carrier 1 has a magnetic latent image forming layer 1a formed on the surface of a drum-shaped base, and a dielectric layer 1b formed thereon. Magnetic latent image forming layer 1
The magnetic layer a is formed by dispersing powders of Fe2O3, CrO2, Fe (iron), Ni (nickel), and Co (cobalt) in a resin. The dielectric layer 1b is formed by coating the magnetic layer 1a with a predetermined synthetic resin or the like.
It has a predetermined thickness so that a magnetic latent image can be formed through the step b. The latent image bearing drum 1 rotates clockwise, and each step arranged around the latent image bearing drum 1 is sequentially followed.

Two ion flow recording heads 2 and 3 are used as electrostatic latent image writing means. Each ion flow recording head 2, 3 has a corona discharger 2.
a, 3a, and an ion atom flying board in which a row of through holes are formed and electrode patterns are formed on both sides so that a potential difference can be generated in each of the through holes. It is composed of 2b and 3b. Here, the corona discharger 2a is configured to generate positive ion atoms, and the corona discharger 2b is configured to generate negative ion atoms. Therefore, in the ion flow recording head 2, positive ion atoms are generated from the corona discharger 2a, and depending on the recording signal, the dielectric layer 1 is
These ion atoms fly to the dielectric layer 1b from the through hole to which a voltage is applied such that the potential becomes lower in the direction b, and in the ion flow recording head 3, negative ion atoms are generated from the corona discharger 3a. In response to a recording signal, these ion atoms fly toward the dielectric layer 1b through the through hole to which a voltage is applied so that the potential increases in the direction of the dielectric layer 1b.

The magnetic latent image writing means 5 is composed of a magnetic head, and writes a magnetic pattern on the magnetic latent image forming layer 1a of the latent image bearing drum 1 to form a magnetic latent image.

As developing means, a first developing means 6 for visualizing an electrostatic latent image consisting of positive charges and a second developing means 7 for visualizing an electrostatic latent image consisting of negative charges. , and third developing means 8 for visualizing the magnetic latent image are arranged in this order. Each developing means 6, 7, 8 includes a container 6b for storing liquid developer 6a, 7a, 8a;
7b, 8b, and is rotatably attached to the containers 6b, 7b, 8b in a state of being immersed in the liquid developer 6a, 7a, 8a,
and a sponge roller 6c in contact with the latent image carrier 1;
7c and 8c. The sponge rollers 6c, 7c, and 8c rotate with the rotation of the latent image carrier 1, whereby the liquid developers 6a, 7a, and 8a are absorbed by the sponge rollers and conveyed onto the latent image carrier 1 to develop the latent image. It's starting to become an image.

The developer 6a of the first developing means 6 is
A so-called liquid developer for electrostatic latent images is used, and for example, it contains a blue pigment or dye, etc. in a dispersion medium with high resistance and low dielectric constant, and is negatively charged. A dispersion of developer particles containing a solvent-insoluble polymer or the like is used.

The developer 7a of the second developing means 7 similarly uses a liquid developer for electrostatic latent images, and for example, a green pigment or pigment is mixed in a dispersion medium with high resistance and low dielectric constant. , which is positively charged, and in which developer particles containing a dispersion medium-soluble polymer, a dispersion medium-insoluble polymer, etc. are dispersed are used.

The developer 8a of the third developing means 8 contains 5 to 5
A magnetic fluid is used in which ferromagnetic powder with a particle size of about 0 nanometers is suspended in water or a predetermined solvent at a predetermined ratio, and a predetermined pigment or dye is added to the fluid to be colored, for example, red. Ferromagnetic powders include magnetite, cobalt-ferrite,
Nickel-ferrite, manganese-ferrite, nickel-zinc-ferrite, iron, nickel, chromium, etc. can be used.

The transfer means 9 is composed of a transfer roller, and the transfer roller 9 is rotatably abutted against the latent image bearing drum 1 with a predetermined pressure. As the recording medium 10 is conveyed between the latent image bearing drum 1 and the transfer roller 9, the magnetic fluid 8a and the electrostatic latent image developing liquids 6a and 7a on the latent image bearing drum 1 are transferred to the recording medium 10. and transfer is performed.

The fixing means 11 is composed of a pair of pressure rollers 11, and the recording medium 10 on which the transfer has been performed is conveyed between them, thereby further impregnating the developer.

The static eliminating means 12 is composed of a corona discharger, a predetermined electric fan, etc., and blows away static electricity existing on the latent image bearing drum 1.

The degaussing head 13 is a magnetic latent image writing means 5.
Similarly, it consists of a magnetic head and demagnetizes the magnetic pattern of the magnetic latent image forming layer of the latent image bearing drum 1.

The cleaning means 14 has a cylindrical sponge 14a, which removes the developer and the like remaining on the latent image bearing drum 1 and stores it in a container 14b.

Next, the operation will be explained.

When the recording apparatus is switched on and the latent image carrier 1 rotates, the ion flow recording head 2 is operated according to predetermined written information, and positive ion atoms are placed at a predetermined position on the dielectric layer 1b. adheres to form a positive electrostatic latent image.

Next, when the latent image carrier 1 further rotates and reaches the position of the ion flow recording head 3, the head 3 is operated according to predetermined written information and is positioned at a predetermined position on the dielectric layer 1b. Negative ion atoms adhere to form a negative electrostatic latent image.

Next, when the latent image carrier 1 further rotates and reaches the position of the magnetic latent image writing means 5, the means 5 is actuated based on predetermined writing information and the latent image is placed at a predetermined position on the magnetic layer 1a. A magnetic latent image is formed.

Next, the latent image bearing drum 1 is transported to a developing process. First, the first developing means 6 causes the developer 6a on the sponge roller 6c to adhere to the positive electrostatic latent image and visualize it. Next, the second developing means 7 causes the developer 7a on the sponge roller 7c to adhere to the negative electrostatic latent image and visualize it. Further, by the third developing means 8, the developer 8a on the sponge roller 8c adheres to the magnetic latent image to visualize it.

Then, it reaches the transfer roller 9 section, where the developer 6a, 7a, 8a on the latent image carrier drum 1 is conveyed while being sandwiched between the latent image carrier drum 1 and the transfer roller 9. The toner is soaked into the medium 10 and transferred, and three-color recording consisting of the colors of the respective developers 6a, 7a, and 8a is simultaneously performed. The recording medium 10 that has passed through the transfer roller 9 passes between a pair of pressure rollers 11 for further fixing, and is then conveyed to the outside of the apparatus (not shown).

The positive and negative static electricity on the latent image bearing drum 1 that has passed through the transfer means 9 is removed by a static eliminator 12, the magnetic latent image is removed by a demagnetizing means 13, and the latent image is further removed at the position of the cleaning means 14. The developer and dirt remaining on drum 1 are removed by sponge 1.
The latent image bearing drum 1 whose surface has been scrubbed clean in step 4a is subjected to the above-described cycle again, and the next recording is performed in the same manner as described above.

In this embodiment, three rotations are made during one rotation of the latent image carrier 1.
Two latent images can be formed simultaneously, and they can be developed and transferred during one rotation of the latent image carrier 1, and three-color recording can be performed in a short time. Furthermore, since three colors can be expressed, many colors can be expressed on a recording medium.

Although the above embodiment deals with the case of performing multicolor recording, the present invention is of course applicable to the case of performing multiple recording consisting of multiple gradations.

Furthermore, in the above embodiment, the sponge roller 6c
, 7c, 8c were used to make the liquid developers 6a, 7a, 8a adhere to the latent image area. It may also be attached.

Further, in the above embodiments, a liquid developer was used, but microcapsules having a positive or negative charge on the outer surface or a capsule toner for magnetography disclosed in JP-A No. 62-276564, for example, may be used. Alternatively, the capsule may be developed using a silica gel, and the capsule may be crushed during transfer to allow the recording liquid inside to soak into the recording medium. It is also possible to practice the present invention using a powder developer.

Furthermore, in the above embodiment, two ion flow recording heads 2 and 3 are provided, but only one ion flow recording head is provided, and the latent image carrier 1 is rotated twice to record each ion flow. A positive or negative electrostatic latent image may be formed during rotation. In this case as well, it is possible to record three colors in two rotations, and the recording speed can be increased. Further, in this case, since there is only one ion flow recording head, the configuration of the apparatus becomes simpler.

[0037]

Effects of the Invention Since the present invention has the above-described structure, three latent images can be formed simultaneously, and there is no pixel shift, and three latent images can be formed in one or two rotations of the latent image carrier.
It becomes possible to record in color or three gradations, and the recording time can be shortened.

Furthermore, since the three latent images can be left as they are on the latent image carrier without being erased, it is possible to sufficiently maintain the adhesion force of the developer attached to the latent images. .

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a recording apparatus of the present invention.

[Explanation of symbols]

1 Latent image carrier 1a Magnetic latent image forming layer 1b Dielectric layer 2, 3 Ion flow recording head 5 Magnetic latent image writing means 6 First liquid developing means 7 Second liquid developing means 8 Third liquid developing means 10 Recording medium

Claims (3)

[Claims] Claim 1: A positively charged electrostatic latent image, a negatively charged electrostatic latent image, and a magnetic latent image are formed on a latent image carrier having a dielectric part and a magnetic latent image forming part, A recording method characterized by developing a charged electrostatic latent image, a negatively charged electrostatic latent image, and a magnetic latent image, and transferring the image visualized by the development to a recording medium. 2. A latent image carrier having a dielectric layer and a magnetic latent image forming layer below the dielectric layer, a first ion flow recording head that generates positively charged charged particles, and a first ion flow recording head that generates positively charged charged particles; a second ion flow recording head that generates charged particles; a magnetic latent image writing device; a first developing device that develops the positively charged electrostatic latent image; and a second developing device that develops the negatively charged electrostatic latent image. A recording apparatus comprising: a second developing means for developing a magnetic latent image; and a third developing means for developing a magnetic latent image. 3. The recording apparatus according to claim 2, wherein the first developing means, the second developing means, and the third developing means are liquid developing means.