JPS60118873A - Recording device utilizing latent image - Google Patents

Abstract

PURPOSE:To execute a recording processing of variable information and fixed information by forming a magnetic latent image and an electrostatic latent image on a recording medium consisting of an electrostatic layer provided on the upper face of a magnetic layer, and executing a development, a transfer, and the whole surface erasion of the latent image. CONSTITUTION:A recording drum 11 has an electrostatic layer consisting of a magnetic layer 11a and a dielectric layer 11b in the vicinity of the surface, and the dielectric layer 11b is provided on the surface of the magnetic layer 1a. A magnetic latent image forming part 12 forms a latent image in accordance with fixed information on the magnetic layer 11a, and an electrostatic latent image forming part 13 forms a latent image in accordance with variable information. A developing part 14 visualizes the magnetic latent image and the electrostatic latent image by using a magnetic toner as a developer. The visualized image is transferred to a printing form 18 by a transferd part 15. A latent image erasing part 17 erases magnetically only all magnetic latent images, and erases electrostatically only all electrostatic latent images. In this way, a recording processing in case of the variable information and the fixed information are mixed can be executed easily.

Description

DETAILED DESCRIPTION OF THE INVENTION +a+ Technical Field of the Invention The present invention relates to a recording device using a latent image, and particularly to a recording device using a magnetic latent image and an electrostatic latent image.

(bl Technology Background Recording devices that utilize latent images include electrophotographic and electrostatic recording devices that utilize electrostatic latent images, and magnetic recording devices that utilize magnetic latent images formed on magnetic layers. The following steps are the same in all recording devices except that the latent image is formed electrostatically in one case and magnetically in the other.

That is, the image is printed out after passing through the processes of latent image formation, development, transfer, and fixing. The latent image remaining on the surface of the recording medium (dielectric drum in the case of electrostatic recording, magnetic drum in the case of magnetic recording) after the transfer is erased and prepared for the next latent image process.

(C1 Prior Art and Problems Now, let's consider a case where a recording device that uses latent images prints out a mixture of variable and fixed information, such as a form. Of the latent image that has been transferred, By leaving a latent image corresponding to fixed information and erasing only the latent image corresponding to variable information, it is only necessary to form a latent image corresponding to variable information in the next latent image process, so speeding up can be achieved. can.

However, it is difficult and inefficient to locally erase the latent image in the latent image erasing section. In other words, locally erasing has the same function as locally forming a latent image, and the latent image erasing section also has the same configuration as the latent image forming section. Moreover, the moving speed of the recording medium must also be reduced due to local erasure.

For this reason, conventionally, even when printing out a mixture of variable and fixed information as described above, once the transfer is completed, the latent image is completely erased, and the latent image, including the latent image corresponding to the fixed information, is erased again. forming an image.

, (d) Purpose of the Invention The present invention focuses on this point and provides a novel device in which even if the latent image is completely erased, the latent image forming section only needs to form a latent image corresponding to a variable item. It is something.

(el) Structure of the Invention The present invention takes advantage of the fact that the magnetic recording method and the electrostatic recording method have different methods for erasing the latent image.
Images are created by magnetic recording, and latent images corresponding to variable information are created by electrostatic recording. That is, the recording device of the present invention comprises a recording medium comprising a magnetic layer and an electrostatic layer provided on the upper surface of the magnetic layer, a magnetic latent image forming section for forming a magnetic latent image on the magnetic layer of the recording medium, and a magnetic latent image forming section as described above. An electrostatic latent image forming section that forms an electrostatic latent image on an electrostatic layer; a developing section that applies a developer to the magnetic latent image and the electrostatic latent image to visualize it; and a developing section that visualizes the visualized image on a recording medium. It is characterized by comprising a transfer section that transfers the image from the image to the printing paper, and a latent image erasing section that entirely erases at least one of the latent images as necessary.

(f) Examples of the invention Embodiments of the present invention will be described in detail below along with the drawings.

FIG. 1 is a schematic diagram showing a recording apparatus using a latent image according to the present invention, in which 11 is a recording drum, 12 is a magnetic latent image forming section, 13 is an electrostatic latent image forming section, 14 is a developing section, and 15 is a developing section. A transfer section, 16 a cleaning section, 17 a latent image erasing section 9B, and 18 a printing paper. The recording drum 11 forms a recording medium,
It has two layers near its surface 4=J.

One is a magnetic layer 11a, and the other is a linal electrostatic layer, which is a dielectric layer 11b, and the dielectric layer 11b is provided on the surface of the magnetic layer 11a. The magnetic layer 11a is made of second iron oxide (Fezo3
), and its specific resistance is 106 to 107 [
The capacitance is preferably 60 (pF/cnl) or less. The dielectric layer 11b has a specific resistance of x
o8 (Ωcm) or more, its capacity is 200 (pF/cut)
) The following is desirable.

The magnetic latent image forming section 12 magnetically forms a latent image in accordance with fixed information on the magnetic layer 11a, and since its structure is well known, details thereof will be omitted. The electrostatic latent image forming section 13 includes a charger 13a and an electrostatic recording section 13b. Charger 13a
The electrostatic recording section 13b uniformly charges the entire surface of the dielectric layer 11b on the recording drum 1■, and the electrostatic recording section 13b removes the charged electric charge according to variable information to form an electrostatic latent image. It is formed by a group of bottle electrodes.

The developing section 14 uses magnetic toner as a developer, and the recording drum II
Developer is supplied to the surface of the recording drum I in synchronization with the rotation of the recording drum A. At this time, the developer is attracted by the electrostatic force of the electrostatic latent image existing on the surface of the dielectric layer 11b, and the electrostatic latent image becomes a visible image. At the same time, since the developer is attracted by the magnetic force of the magnetic latent image, it adheres to the surface of the dielectric layer in the same manner as the developer caused by the electrostatic latent image, and the magnetic latent image becomes a visible image.

In this way, a toner image made of a developer is formed on the surface of the recording drum 11 in accordance with the magnetic latent image and the electrostatic latent image, and this toner image is transferred onto the printing paper 18 by the transfer section 15. Possible transfer methods in the transfer section 15 include corona transfer and pressure transfer. The toner image transferred to the printing paper 18 is held in a fixing section (not shown) and fixed by heat or pressure.

The cleaning section 6 removes residual toner that has not been transferred from the recording drum 11 to the printing paper 1B in the transfer section 15 from the surface of the recording drum 11, and can be carried out by a blade method, a rotating brush method, or the like.

The latent image erasing section 17 includes a magnetic erasing section 17a and an electrostatic erasing section 17b.
It becomes more. The magnetic erasing section 17a is for magnetically erasing all the magnetic latent images existing on the magnetic layer 1iflla, while the electrostatic erasing section 17b is for erasing all the electrostatic latent images existing on the dielectric layer 11b. It erases electrostatically. Therefore, the electrostatic latent image is not affected by the magnetic latent image erasing section 17a, and on the contrary, the magnetic latent image is not affected by the electrostatic latent image erasing section 17b.
The latent image is not disturbed.

Next, the operation shown in FIG. 1 will be briefly explained, taking as an example the case where a form as shown in FIG. 2 is printed. Note that in FIG. 2, the information expressed by solid lines is fixed information, and the information expressed by dotted lines is variable information.

It is now assumed that no latent image is formed on either the magnetic layer 11a or the dielectric layer 11b on the recording drum II. In synchronization with the rotation of the recording drum 11, the magnetic latent image forming section 12 first forms a magnetic latent image on the magnetic layer 11a according to fixed information. Next, the drum 11 rotates and the electrostatic latent image forming section 1
3, an electrostatic latent image corresponding to the variable information is formed on the dielectric layer 11b by the charger 13a and the electrostatic recording section 13b. When this latent image passes through the developing section 14, the latent image is made visible by the developer, and a toner image is formed on the drum 11. The toner image is transferred to the printing paper 18 in the transfer section 15, and passes through the fixing section, so that a form as shown in FIG. 2 is printed on the printing paper 18.

After passing through the transfer section 15, the drum passes through a cleaning section 16, where residual toner is removed from its surface, and a latent image erasing section 17.
reach. In this latent image erasing section 17, the electrostatic latent image erasing section 17b
Since only the magnetic layer is erased, the electrostatic latent image on the dielectric layer, that is, the latent image corresponding to variable information, is erased, but the magnetic latent image on the magnetic layer, corresponding to fixed information, is not erased. Therefore, an electrostatic latent image corresponding to another variable information may be formed on the dielectric layer again by the electrostatic latent image forming section 13.

Note that the magnetic latent image forming section may form a latent image corresponding to variable information, and the electrostatic latent image forming section may form a latent image corresponding to fixed information. In this case, it must be taken into consideration that the electrostatic force decreases significantly with time compared to the magnetic force, and that the electrostatic force decreases depending on the bias voltage of the developing section.

Further, the arrangement of the electrostatic latent image forming section and the magnetic latent image forming section with respect to the rotational direction of the drum is not limited to that shown in FIG. 1, and the electrostatic latent image may be formed first.

In addition, the developer is not limited to magnetic toner; a two-component toner can be used for electrostatic latent images, and a magnetic 1-toner can be used to visualize latent images. good.

Furthermore, by using a photosensitive layer instead of a dielectric layer as the electrostatic layer provided on the recording drum, an electrostatic latent image can be formed in the electrostatic recording section using a laser. in this case,
The electrostatic latent image erasing section consists of a lamp.

(gl As explained in detail about the invention, since information is recorded using latent images with different properties such as magnetic latent images and electrostatic latent images, when one latent image is erased, the other latent image is not erased,
Therefore, this is convenient when printing out a mixture of variable information and fixed information.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing a recording apparatus using a latent image according to the present invention, and FIG. 2 shows an example of print output. In the figure, 11 is a recording drum, 12 is a magnetic latent image forming section, and 13 is a recording drum.
14 is an electrostatic latent image forming section, 14 is a developing section, 15 is a transfer section, and 16 is an electrostatic latent image forming section.
17 is a cleaning section, 17 is a latent image erasing section, 18 is a printing paper, Ila is a magnetic layer, and llb is a dielectric layer.

Claims (2)

[Claims] (1) A recording medium consisting of a magnetic layer and an electrostatic layer provided on the upper surface of the magnetic layer, a magnetic latent image forming section that forms a magnetic latent image on the magnetic layer of the recording medium, and a magnetic latent image forming section that forms a magnetic latent image on the magnetic layer of the recording medium; Electrostatic latent image forming section that forms an electrostatic latent image, magnetic latent image and electrostatic/Vi
A developing section that applies developer to the image to make it visible, a transfer section that transfers this visualized image from the recording medium to printing paper, and a latent image erasing section that erases at least one of the latent images from the entire surface as necessary. A recording device that uses a latent image. (2) The electrostatic latent image forming section forms an electrostatic latent image according to the variable length of the information to be recorded, and the magnetic latent image forming section forms a magnetic latent image according to the fixed information, and the latent image Claim (1) characterized in that the erasing section erases only the electrostatic latent image.
A recording device that uses a latent image as described in .