JPH02305661A - Perfecting recorder - Google Patents

Abstract

PURPOSE:To apply recording also on a surface reverse to an image recording surface on a recording medium by mounting a recording mechanism for conducting recording on the surface reverse to the image recording surface. CONSTITUTION:When paper 1 is fed rightward by a paper feed drum 13 and a pressure roller 14, a latent image is formed on the paper 1 with positive or negative electric charges by chargers 11, 12. The latent image on the paper 1 is developed in the process that the paper 1 is further fed and dipped in a developer 5 and a toner is attracted to the electric charges on the latent image part. Four units A-D each constructed as the above are provided so as to correspond to four color toners of Cyan, Magenta, Yellow, and Black. A rear-surface recording mechanism consisting of a recording head 17 and an ink ribbon 18 for the rear surface is disposed before the first unit A. In this manner, while not only character information to be recorded on the rear surface but also a register mark for images are recorded by said mechanism and read by sensors 19A-19D, a color image can be recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a double-sided recording device that is capable of simultaneously recording on both sides of a recording medium.

[Conventional technology]

In recent years, technology for inputting/outputting, storing, and transmitting images in color has developed, and the number of systems that handle color image information is increasing year by year. When outputting a hard copy of a color image,
There often arises a need to record information and data about images together with the images. However, usually
Particularly high-definition images are stored on recording media as bit patterns. Therefore, in order to record information together with characters on the same sheet of paper, it is common practice to convert encoded character information into a bit pattern before recording.

[Problem to be solved by the invention]

In this case, if the character information could be recorded on the back side of the paper, not only would processing become easier, but the size of the required paper would also be smaller, which would greatly improve economic efficiency and convenience of handling.

However, in order to do this, a recording mechanism must be added to record on the back side of the paper.

Conventional recording devices use a photosensitive drum, and one side of the recording medium is usually in contact with the drum during each process of latent image formation and development, and a mechanical device for recording on one side of the recording medium. Since this requires a considerable amount of space, it has been difficult to add a mechanism for recording characters or images on the other side of the recording medium, that is, the back side.

An object of the present invention is to provide a screen recording device that is capable of recording an image on a recording medium on the opposite side of the recording surface.

[Means to solve the problem]

A double-sided recording device according to the present invention is a recording device that records a latent image on an electrostatic recording medium by controlling an ion flow and prints an image using toner, and is a recording device for recording on the side opposite to the image recording side. It is equipped with a recording mechanism.

(Function) In the present invention, an image is printed on one side of the electrostatic recording medium, and recording is also performed on the opposite side to the recording side of the image.

〔Example〕

One of the main components of this invention is a recording device that controls ion flow to record a latent image on an electrostatic recording medium and prints an image using toner. Examples of the invention will be described.

Ion flow recording technology is characterized by generating ions with a charger, controlling the flow mainly by electrical means, and irradiating them onto a recording medium to form a latent image. Unlike dithering methods that express gradations in dot units,
By controlling the shading of each dot, it is possible to express extremely rich tones. In this technique, a liquid toner with fine toner particles is used to take advantage of the above-mentioned characteristics, and when color toner is used, a high-resolution color image can be obtained. A feature of this technology is that the device can be configured without using a photosensitive drum. This invention is characterized in that another recording mechanism is installed on the back side of this recording medium.

FIG. 4 shows an example of a monochrome recording device using ion flow recording technology. In FIG. 4, 1 is an electrostatic recording paper (hereinafter simply referred to as paper), 1A is a roll of this paper 1, and 2 is a paper guide drum, which also serves as a paper support section for development. 3 is a developing drum, 4 is a developing tank, 5 is a developer,
6 is a wire electrode of a latent image writing charger, 7 is a shield electrode of the latent image writing charger, 8 is a control electrode for controlling ion flow, 9 is a counter electrode of the latent image writing charger, and 10 is a wire electrode of the latent image writing charger. After development, the developer solvent is transferred from paper 1 to developer tank 4.
Wire electrode of squeeze charger for pushing back, 11
12 is a counter electrode of the squeeze charger, and 13 is a paper feed drum, which is connected to a step motor (not shown). 14 is a pressure roller, 15 is a guide roller, and 16 is a back tension roller for taking up the slack of the paper 1.

Next, the monochrome printing operation of an example apparatus using ion flow recording technology will be explained with reference to FIG. First, when the paper 1 is being fed to the right by the paper feed drum 13 and the pressure roller 14 at a predetermined feeding pitch and speed, a charger for writing a latent image will cause a + (plus) or - ( A latent image is formed with a negative charge. The case of ten electrostatic latent images will be explained below.

In other words, there is a distance of several K between the wire electrode 6 and the shield electrode 7.
When a voltage of V to several tens of kilovolts is applied, a corona discharge generates a tens of ion currents.

Here, the control electrode 8 that controls the ion flow will be explained. FIG. 5 shows an example of the configuration of the control electrode 8, and FIGS. 6(a) and (
b) shows an explanatory diagram of the control method.

As shown in the figure, the control electrode 8 consists of an upper electrode 8A1, a lower electrode 8A2, and an insulating plate 8B interposed between the two.
A plurality of apertures 8C are provided, through which the ion flow passes and is attracted to the counter electrode 9 and adsorbed onto the paper 1. The aperture 8c to be activated at this time is selected by selecting the lower electrode 8A2, and the amount of ion flow passing through is determined by the charge voltage deposited on the paper 1, that is, the density of the image. This amount of passage can be controlled by the voltage applied to the control chamber 8i8, the method, and the application time. In order to obtain an image with high gradation, it is recommended to change the density of the pixel to be written by varying the application time depending on the number of unit electric pulses applied to the control electrode 8. This method is effective from the viewpoint of ease of control and equipment configuration such as the power supply device. It's advantageous.

The latent image on the paper 1 advances to the developing section as the paper 1 is further fed. The developing tank 4 contains toner liquid having negative polarity toner powder, which is rolled up toward the paper guide drum 2 by the rotating developing drum 3. When the latent image portion reaches this point, it is immersed in the rolled-up developer 5, and toner powder is adsorbed to the charges in the latent image portion, thereby performing development. Next, as the paper 1 moves further to the right, there is a squeeze charger, and the ion flow generated by this (in this case, either polarity is effective) removes the excess toner that adheres to the paper 1 into the developing tank. Pushed back towards 4.

An embodiment of the double-sided recording apparatus of the present invention using the above-mentioned ion flow recording apparatus will be described below.

FIG. 1 shows an embodiment of a double-sided recording apparatus according to the present invention, in which conventional single-sided paper 1 is used and a thermal transfer recording mechanism or an impact recording mechanism is used as the recording mechanism for printing on the back side. This example has four units A to D, each consisting of the latent image writing section and the developing section mentioned in the example of the monochrome image recording device, and converts color toner into four colors of cyan, magenta, yellow, and black. We are making it compatible. In this way, when multiple images are overwritten using multiple toners, marks for image alignment are placed on the front side of paper 1 in advance or by the recording mechanism itself, and these are read with a sensor as appropriate. A common method is to record each color. In FIG. 1, 17 is a recording head on the back side, and 18 is an ink ribbon. This back side recording mechanism can be installed before or after any unit, but if it is installed in front of the first unit A, it will record not only the character information to be recorded on the back side, but also the alignment mark mentioned above, and the sensor A color image can be recorded while reading with 19A to 19D.

Therefore, since the mark is on the back side, the surface on which the image is recorded is neat and does not look distracting when viewed. When using paper 1 with marks attached in advance, it is of course possible to install it in the unit D that records last. In this embodiment, printing of characters, etc. on the back side is faster than printing images on the front side, so the processing speed of the printing device is determined by the speed of image output. This saves time and effort in the printing process.

In this embodiment, other recording methods such as electrophotography, ion flow control, and inkjet recording may of course be used for printing on the back side.

FIG. 2 shows another embodiment in which an electrostatic recording mechanism is used for printing on the back side of a recording medium, and a recording medium that can perform electrostatic recording on both sides as shown in FIG. 3 is used.

For example, FIG. 3(a) shows a recording medium in which a conductive layer 21 and an insulating layer 22 are formed on both sides of a polyester base material 20, and FIG. 3(b) shows a recording medium in which a conductive material is used for the base material 2OA. Therefore, it can be used in the same manner as in FIG. 3(a). In the embodiment shown in FIG. 2, forming a latent image with a recording needle 23 and developing it with a developing device 24 is the same as in the conventional electrostatic recording method.

Note that it goes without saying that the recording on the surface of the paper 1 is not limited to only character information.

〔Effect of the invention〕

As explained above, the present invention is a recording device that records a latent image on an electrostatic recording medium by controlling an ion flow and prints an image using toner. Because it has a recording mechanism, high-definition images and text can be printed almost simultaneously, allowing for high-speed output processing.Explanatory text and data about the image can be recorded on the back side, so the size of the paper on which the image is recorded can be It is small and convenient for handling and organizing. It can also be used to produce color printed postcards with the addressee printed on the back.

[Brief explanation of drawings]

1 and 2 are schematic structural diagrams showing an embodiment of the present invention, respectively. FIGS. 3(a) and 3(b) are explanatory diagrams of the structure of a recording medium used in the embodiment of FIG. Figure 4 is a schematic configuration diagram showing a monochrome image recording device using ion flow recording technology, Figure 5 is a perspective view of a control electrode, and Figures 6 (a) and (b).
) is an explanatory diagram of the ion flow control method. In the figure, 1 is electrostatic recording paper, 1A is a roll of electrostatic recording paper, 2 is a paper guide drum, 3 is a developing drum, 4 is a developer tank, 5 is a developer, 6 is a wire electrode, 7 is a shield electrode, 8 is a control electrode, 9 is a counter electrode, 13 is a paper feed drum, 14 is a pressure roller, 15 is a guide roller, 17
is the recording head on the back side, 18 is the ink ribbon, 19A~
19D is a sensor that reads alignment marks, 20°2
0A is a base material, 21 is a conductive layer, 22 is an insulating layer, 23 is a recording needle, and 24 is a developing device. Figure 1 Figure 2 F 3 23 Recording light 24 Stainless steel Figure 3 Figure 4 b Wire electrode Figure 6 (a) (b) ' 9 9

Claims (1)

[Claims] A recording device that controls an ion flow to record a latent image on an electrostatic recording medium and prints an image using toner, characterized by being provided with a recording mechanism for recording on a surface opposite to the recording surface of the image. Double-sided recording device.