JPH04204783A - Recorder - Google Patents

Abstract

PURPOSE:To perform a stable transfer even on any transfer parts and to improve transfer efficiency as the whole of a transfer area by allowing a recording medium in a surface state to contact with a latent image carrier for a prescribed time on a transfer means part. CONSTITUTION:This recorder is provided with a transfer means 8 transferring a liquid recording agent 7b moved on the latent image carrier 5 to the the recording medium 10, in such a manner that the recording medium 10 passes over plural counter members 8a-8b arranged opposite to the latent image carrier 5, and comes into contact with the latent image carrier 5, in the surface state, for the prescribed time, and a latent image erasing means 12 erasing a latent image on the latent image carrier 5. Therefore, a recording material, etc., in a liquid state or a paste state, are in contact with the recording medium during this prescribed time. Thus, time for the transfer is sufficiently given, and a sufficient transfer is performed on any parts, without being affected by transfer conditions. etc. On the other hand, the time for the transfer is sufficiently given, so that the transfer efficiency as the whole of a recording surface can be increased.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application vF] The present invention relates to an apparatus for transferring a developer, which has developed a latent image on a latent image carrier, to a recording medium in a liquid state or a paste state.

[Prior Art] A recording device that visualizes a magnetic latent image using a liquid developer and transfers it to a recording medium is capable of high-density recording.

It is considered as a promising recording method because of its high performance and the ability to obtain high recording image quality.

In addition, in recording devices that use a liquid developer, the solvent evaporates and the viscosity changes, resulting in a change in the development state, or since the developer is a liquid, the developer may spill if subjected to vibrations or tilting. As a solution to this problem, for example, a liquid or paste core material in which a recording material such as carbon or B material and a magnetic material are dispersed in a pressure fixing resin is wrapped in a wall material. The latent image is visualized using microcapsules, and this capsule-shaped developer is pressed against a recording medium with a predetermined pressing force using a transfer roller or the like. It is known that it can be transferred to a recording medium (for example, Japanese Patent Application Laid-Open No. 62-27656).
Publication No. 4).

In addition, in a patent application filed on November 28, 1990 (title of invention: Color microcapsules for magnetic recording and magnetic recording device using the same), the applicant describes a core material containing color ink as a wall material. The present invention discloses a color microcapsule having a structure in which a magnetic material is attached to the outside of a wall material. With this configuration, a magnetic material having a specific color such as black or brown can be left mainly on the magnetic latent image carrier side such as a magnetic drum during transfer, and the magnetic material is not restricted by the color of the magnetic material. It is possible to perform recording in various colors without using any color.

[Problem to be solved] By the way, when a recording material or the like is transferred to a recording medium in a liquid or paste state, the speed at which the recording material or the like permeates into the recording medium depends on the surface of the recording medium. It depends slightly on the condition, the surface condition of the latent image carrier, the surface condition of the transfer roller when using a transfer roller, or the pressing force of the recording medium on the latent image carrier. If transfer is to be performed in a short period of time at such positions, the above-mentioned conditions may have a large effect, and there may be places where the transfer is extremely insufficient.

In addition, when transferring in a short time, it is necessary to increase the pressing force on the latent image carrier of the recording medium in order to increase the speed of penetration. There is a limit, and therefore, there are cases where the overall transfer is not performed satisfactorily.

Therefore, the object of the present invention is to
In a recording device that transfers a recording material to a recording medium, a recording device that can perform sufficient transfer in any part regardless of the above conditions and can improve the overall transfer efficiency. It is about providing.

[Means for Solving the Problems] In order to achieve the above object, a recording device of the present invention includes a latent image carrier, a means for writing a latent image onto the latent image carrier,
between a developing means for moving a liquid recording agent to be transferred in a liquid state to a recording medium to a latent image carrier on which the latent image is formed, and a plurality of opposing members disposed opposite to the latent image carrier; A recording medium is passed across the recording medium, and as a result, the recording medium contacts the latent image carrier for a predetermined period of time in a flat state, and the liquid recording agent that has moved onto the latent image carrier is transferred to the recording medium. Transfer means and the above sub! #! and latent image erasing means for erasing the latent image on the carrier.

[Operation] The recording medium is in contact with the latent image carrier for a predetermined period of time in a surface state, that is, the recording material in a liquid state or a paste state is in contact with the recording medium during this time, and therefore, for transfer. Sufficient time is given, and any part can be sufficiently transferred without being influenced much by transfer conditions or the like.

Furthermore, since sufficient time is provided for transfer, the efficiency of transfer as a whole on the recording surface is increased.

[Implementation Ml] Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

In FIG. 1, the latent image carrier 5 is composed of a magnetic drum having a cylindrical base body and a magnetic layer formed on the outer periphery thereof. The magnetic layer is made of Fe203, CrO2, Fe (iron), N1 (-
Co (cobalt) powder is dispersed in resin. The magnetic drum 5 rotates clockwise as shown, and is arranged around the magnetic drum 5 so that each process is sequentially performed.

The magnetic latent image writing means 6 is composed of a magnetic head and writes a magnetic pattern on the magnetic layer of the magnetic drum 5 to form a magnetic latent image.

The developing means 7 stores the magnetic fluid 7b in a container 7a, and stores the magnetic fluid 7b in the container 7a.
A cylindrical member 7c having magnetism rotatably supported by a is immersed in a magnetic fluid 7b, and the cylindrical member 7c is attached to a magnetic drum 5.
The structure is in contact with the

Therefore, as the magnetic drum 5 rotates, the cylindrical member 7C rotates, and the magnetic fluid 7b attached to the cylindrical member 7C is transferred onto the magnetic drum 5, thereby visualizing the magnetic latent image. The magnetic fluid is made by suspending ferromagnetic powder with a particle size of about 5 to 50 nanometers in water or an organic solvent at a predetermined ratio. Ferromagnetic powders include magnetite and cobalt-ferrite.

Nickel-ferrite, manganese-ferrite.

Nickel-zinc-ferrite, iron, nickel, chromium, etc. can be used.

As shown in detail in FIG. 2, the transfer means 8 has a structure in which two transfer rollers 8a and 8b are separated by a predetermined distance and rotatably abut against the magnetic drum 5 under a predetermined pressure. The transfer rollers 8a and 8b are both supported by compression springs so as to be biased inward in the radial direction of the magnetic drum 5, and are movable in the outward radial direction of the magnetic drum 5 against the biasing force. (not shown). The transfer roller 8a, which is closer to the developing means 7, is not driven to rotate by itself, and the transfer roller 8b, which is farther from the developing means 7, has its own rotational drive source and has the same circumferential speed as the magnetic drum 5. It rotates (not shown). The recording medium 10 has two transfer rollers 8
The magnetic drum 5 is passed between the transfer rollers 8a, 8b and the magnetic drum 5, spanning between the rollers 8a and 8b. Therefore, the recording medium 10 is brought into contact with the magnetic drum 5 between the transfer roller 8a and the transfer roller 8b. The distance between the two transfer rollers 8a and Sb is designed so that the magnetic fluid 7b is sufficiently soaked into the recording medium 1 and transferred during the contact of the recording medium 10 with the magnetic drum 5. ing.

Similarly to the magnetic latent image writing means 6, the degaussing section 12 is
It consists of a magnetic head and demagnetizes the magnetic pattern on the magnetic layer of the magnetic drum 5.

The cleaning means 13 has a cylindrical sponge 13a, and removes the magnetic fluid 7b remaining on the magnetic drum 5 and stores it in a container 13b.

With this structure, magnetic latent images are sequentially formed on the magnetic layer of the magnetic drum 5 by the magnetic latent image writing means 6, and the portions where the magnetic latent images have been formed proceed to a developing step. Then, the magnetic fluid 7b in the container 7a adheres to the magnetic latent image on the magnetic drum 5 via the cylindrical member 7C, making the magnetic latent image visible]2.
This magnetic fluid 7b moves to the transfer process.

Then, the recording medium 10 is conveyed to the transfer rollers 8a and 8b in synchronization with the time when the magnetic fluid reaches the transfer process.
The magnetic fluid 7b that has reached the transfer step comes into contact with the recording medium . Since the recording medium 10 is in contact with the magnetic drum 5 between the transfer rollers 8a and 8b, the magnetic fluid 7b is in contact with the recording medium 10 for a long period of time. , the viscosity of the liquid developer, the angle of contact with the base I\- and the recording medium, the pressing force of the recording medium 10 against the magnetic drum 5, etc., and the magnetic fluid 7b can perform recording at any recording location. The image is sufficiently soaked into the medium 10 and transferred and fixed.

Furthermore, since the recording medium and the magnetic fluid are in contact for a long period of time, the efficiency of transfer in the entire transfer area is improved. In other words, when transferring powder toner to a recording medium, the transfer time does not affect the transfer time very much, but when transferring liquid toner by soaking it into the recording medium, the amount of penetration depends on the contact time, and the contact time Transfer efficiency can be improved by lengthening the time. Note that since the transfer roller 8b is driven by itself, it acts in the direction of pulling the recording medium 10 between the transfer roller 8a and the transfer roller 8b, and therefore the recording medium 10 between the transfer roller 8a and the transfer roller 8b is pulled.
The deflection of the recording medium 1 ( ) and the magnetic drum 5 is prevented.
Transfer leakage due to non-contact is prevented.

The recording medium 10 that has passed through the transfer roller 8b is conveyed to the outside of the apparatus as it is, or if further fixing is to be performed, it is conveyed to the outside of the apparatus by being sandwiched between, for example, a pair of pressure rollers. (Illustration omitted).

The magnetic latent image on the magnetic drum 5 that has passed through the transfer means 8 is demagnetized by the degaussing means 12, and further, the magnetic fluid, dust, etc. remaining on the magnetic drum 5 are removed by the cleaning means 13. The magnetic drum 5 whose surface has been cleaned by rubbing with the sponge 13a is again used as the magnetic latent image writing means 6.
A magnetic latent image is formed, and subsequent recording and transfer are performed in the same manner as described above.

In the above embodiment, the transfer roller 8b that is farther from the developing means is driven by itself, but it may be configured to rotate following the rotation of the magnetic drum 5 without being driven by itself.

6 In addition, in the above embodiment, the liquid recording agent and 1. In this case, a magnetic fluid is used, as described in the conventional example section, namely, a recording material such as carbon or pigment, and a capsule-shaped developer wrapped in a magnetic material or wall material. Of course, rxj can also be applied to a capsule-shaped developer in which such a recording material is wrapped in a wall film material and a magnetic material is attached to the outside of the wall film material.

In this case, a mag roller or the like is used as the first stage of development, and force is used as the transfer means. A means for breaking the wall material of the cellular developer is provided. In the case of the above embodiment, for example, the wall film material may be broken by the pressing force of the transfer roller 8a near the developing means against the magnetic drum.

In the above embodiment, the transfer means section 8 is composed of two transfer rollers 8a and 8b, but as shown in FIG. The transfer blades 28a and 15, and the side far from the developing means may be a rotatable transfer roller 28b.Furthermore, two transfer chargers are provided at a predetermined distance apart, and the recording medium is brought into contact with the latent image carrier between them. (In addition, it is possible to think of various types of facing members for pressing the recording medium against the surface of the latent image carrier. Also, the number of facing members is not limited to two, but may be three or more.) But that's fine.

Furthermore, the present invention is applicable not only to magnetic recording devices but also to electrostatic recording devices. In this case, a photosensitive drum, dielectric drum, etc. is used as a latent image carrier, and a latent image writing means and [
7 and light. - An electrostatically charged fluid can be used as a liquid developer, such as a laser. Note that it is also possible to develop the recording material with a mag roller or the like using a capsule-shaped developer in which the recording material is wrapped in a wall material and the outside of the wall material is electrostatically charged.

In addition, the present invention can be modified in various ways without departing from its concept, such as the latent image carrier not being limited to a drum shape but also a belt shape.

[Effects] In the present invention, the recording medium is brought into contact with the latent image bearing member in a surface state for a predetermined period of time in the transfer means section, so that the recording material of the liquid recording agent sufficiently soaks into the recording medium at any transfer portion. Since stable transfer is performed and the contact is maintained for a predetermined period of time, the recording material continues to soak into the recording medium during that time, increasing the efficiency of transfer in the transfer area as a whole. .

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a recording apparatus according to an embodiment of the present invention, FIG. 2 is an enlarged view of the transfer means section in FIG. 1, and FIG. 3 is an enlarged view showing another example of the configuration of the transfer means section. . 5...Latent image carrier, 6...Latent image writing means, 7...Developing means, 7b...Liquid developer (magnetic fluid), 8.28...Transfer means, 8a, 8b 28a, 28b... A plurality of opposing members, 10... Recording medium, 12... Latent image erasing means. Fig. 1 5--5 Enemy elephant'fil special A 45 6---Ta arm and arm A1 Bottom means 7--Hard, 1 & hand length 7b-11 wave 11 King's mouth (h nihe'i'FE514mi) 8-m-transfer means 8a, 8b-11 ridge rei-H mukai IJ 10-'--based on Yoshikimine- 12---441ic sound fA+'f !

Claims (1)

[Scope of Claims] A latent image carrier, a means for writing a latent image on the latent image carrier, and a liquid recording agent to be transferred in a liquid state to a recording medium. A recording medium is passed between a developing means to be moved to the body and a plurality of opposing members arranged opposite to the latent image carrier, whereby the recording medium is kept flat for a predetermined period of time on the latent image carrier. a transfer means for transferring the liquid recording agent that has moved onto the latent image carrier in contact with the latent image carrier to the recording medium; and a latent image erasing means for erasing the latent image on the latent image carrier. A recording device characterized by: