JPS6150174A - Color recording device of liquid development - Google Patents

Abstract

PURPOSE:To prevent a recording paper from contacting developing devices to prevent dirt of the recording face by providing pneumatic devices which support the recording paper pneumatically and separating the recording paper from a developing device by the pneumatic device when the recording paper after development of each color is fed reversely. CONSTITUTION:A recording paper 26 is run in the direction of an arrow A by a take-up roll 27 for the purpose of recording one of yellow Y, magenta M, cyan C, and black B. A latent image is formed on a prescribed part of the recording paper 26 by an electrostatic recording head 15, and one of developing devices 21-24 is brought closely into contact with the recording paper 26 to develop the latent image. After recording of one color is terminated, the developing device used for this development is separated from the recording paper 26. The recording paper 26 is fed reversely in the direction of an arrow B by a supply roll 28. When the recoding paper 26 is fed reverse, vacuum attracting devices 11a, 11b, and 11c are operated to attract the recording paper 26, and the recording paper 26 is separated from developing devices 21-24 and is prevented from contacting developing devices 21-24. Thus, color development without dirt of the recording face is possible.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a liquid development color recording device.

Structure of the conventional example and its problems As shown in FIG. 1, the conventional liquid development color recording device has an electrostatic recording head 5 facing an electrostatic recording head 5 that forms a latent image on a recording paper 6. A platen roller 9 is installed near the electrostatic recording head 5 and moves the recording paper 6. A supply roller 8 is installed near the electrostatic recording head 5 and moves the recording paper 6. A take-up side roller 7 which is provided in the conveying direction and moves the recording paper 6, and a roller 7 which is disposed near the recording paper 6 between the electrostatic recording pad 5 and the take-up roller 7, each of which carries a yellow liquid. toner, magenta liquid toner,
Cyan liquid toner, black liquid toner.

a first developer having a toner;1. Second developer 2゜Third developer 3. It consisted of a fourth developing device 4.

By the way, in the liquid development color recording apparatus configured as described above, after the negative color is developed, it is necessary to once reversely feed the recording paper 6 in the direction of arrow B in order to perform the next color development. However, at this time, the surface tension of the liquid toner causes the recording paper to become
As shown in the figure, in order to solve this problem, the developing device (indicated by the third developing device 3 in FIG. In, the first
Developing device 1. Second developer 2. Third developing device 3゜A conveying roller 10 is provided near the recording paper 6 between each of the fourth developing devices 4 on the side of each developing device with respect to the recording paper, and when the recording paper is reversely fed, the roller 1Q is raised. , recording paper 6 and valley developer 1, 2, 3
．． I can think of separating it from 4.

However, in this case, a new problem arises in that the recording surface, which has not yet been sufficiently dried, comes into contact with the roller surface, resulting in the recording screen becoming dirty.

OBJECTS OF THE INVENTION It is an object of the present invention to provide a liquid development color recording device that does not cause the recording paper to come into contact with the developing device during reverse feeding of the recording paper and does not stain the recording screen.

Structure of the Invention The present invention provides an electrostatic recording head that forms a latent image on recording paper;
In a liquid development color recording device consisting of a plurality of developing units installed near the recording head in the conveyance direction of the recording paper and each having a liquid toner of a different color, there are also nine units installed near the recording paper corresponding to the location where each developer is installed. The gist is that a pneumatic device is provided to support the recording paper by pneumatic action. The pneumatic device is
Applying positive or negative pressure to the recording paper during reverse feeding of the recording paper after development for each color to separate the recording paper from the developing device,
Prevents the recording paper from coming into contact with the developing device.

As an example of installing the pneumatic device, there is a case where the pneumatic device is installed on the side opposite to the developing unit with respect to the recording paper. In this case, the recording paper is sucked during the reverse feeding operation of the recording paper, and the recording paper is separated from the developing device.
Prevents the recording paper from coming into contact with the developing device.

Another example of installing the pneumatic device is to install it on the current side of the recording paper. In this case, air is blown onto the recording paper during the reverse feeding operation of the recording paper to separate the recording paper from the developing device and prevent the recording paper from coming into contact with the developing device.

DESCRIPTION OF EMBODIMENTS FIG. 4 is a diagram showing a schematic configuration of a liquid development color recording apparatus according to a first embodiment of the present invention. In the figure, the liquid development color recording device is installed opposite to an electrostatic recording head 25 that forms a latent image on a recording paper 26, and includes a platen roller 29 in sliding contact with the recording paper 26 and a platen roller 29 near the electrostatic recording head 25. A supply roller 28 is installed to move the recording paper 26, and a winding roller 27 is installed downstream of the electrostatic recording pad 25 and moves the recording paper 26 in the transport direction of the recording paper 26. Electrostatic recording head 25 and take-up roller 27
Yellow (hereinafter abbreviated as Y) liquid toner, magenta (hereinafter 1M
It is abbreviated as. ), a cyan (hereinafter abbreviated as C) liquid toner, and a black (hereinafter abbreviated as B) liquid toner, respectively.
Second developer 22, third developer 23, fourth developer 2
4 and the developing devices 21 , 22 , 23 corresponding to the installation portions of the developing devices 21 , 22 , 23 , 24 relative to the recording paper 26 .
．． A vacuum suction device 11a is a pneumatic device that is provided on the opposite side of the recording paper 24 and supports the recording paper 26 by pneumatic action.

11b and 11C.

In the liquid development color recording apparatus configured as described above, first, a recording paper 2 is used to record either Y, M, C, or H.
6 is run in the direction of arrow A by the roller 27 on the winding 9 side, a latent image is formed on a predetermined portion of the recording paper 26 by the electrostatic recording head 25,
One of the developing units 21, 22, 23, and 24 is placed on the recording paper 26 to perform a photographic image.

When recording of one color is completed, the one developing device that has performed the development is separated from the recording paper 26. The recording paper 2e is reversely fed in the direction of the υ arrow B by the supply roller 26. This recording paper 2
6, during the reverse feeding operation, the vacuum suction devices 11a, 11b,
11c operates, sucks the recording paper 26, separates the recording paper 26 from the developing devices 21, 22, 23, 24, and removes the recording paper 26.
This prevents it from coming into contact with the developing device 21, 22, 23, and 24.

Further, FIG. 5 is a diagram showing a schematic configuration of a liquid development color recording apparatus according to a second embodiment of the present invention.

In the figure, an electrostatic recording head 25. Platen roller 29
．． The supply roller 281, the take-up roller 27, the first developer 21, the second developer 22, the third developer 23, and the fourth developer 24 constitute the liquid development color recording apparatus shown in FIG. are configured similarly. The developing devices 21, 22, and 23 correspond to the installation portions of the first developing device 21, the second developing device 22, the third developing device 23, and the fourth developing device 24, and
．． Air discharge nozzles 12 a and 12 b are pneumatic devices provided on the 24 side and support the recording paper 26 by pneumatic action.
.

12c is installed. In the liquid development color recording apparatus configured as described above, during the reverse feeding operation of recording M26,
The air discharge nozzles 12a, 12b, and 12c operate to blow air onto the recording paper 26, separating the recording paper 26 from the developing units 21, 22, 23, and 24, and removing the recording paper 26;
This prevents the developing device from increasing at 21.22, 23.24 KPM.

Effects of the Invention According to the present invention, the recording paper is supported by air pressure in the vicinity of the recording paper corresponding to the developing device installation area.

This pneumatic device separates the recording paper from the developing device when the recording paper is reversely fed after each color is developed, so that the recording paper does not come into contact with the developing device and the recording screen is not smudged. It is possible to provide a liquid development color recording device that is free of liquid development.

[Brief explanation of drawings]

Figure 1 is a configuration diagram of a conventional liquid development color recording device;
The figure is an operating state diagram of the liquid development color recording device shown in FIG. 1, FIG. 3 is a configuration diagram of another conventional liquid development color recording device, and FIG. 4 is a liquid development color recording device according to the first embodiment of the present invention. FIG. 5 is a block diagram of a liquid development color recording apparatus according to a second embodiment of the present invention. 11a, 11b, 11c---vacuum suction device,
12a. 12b, 12c...Air discharge nozzle, 21...
. . . Developing device 1, 22 . . . Second developing device, 23 . . . Third developing device, 24 . . . Fourth developing device, 26・・・・・・Electrostatic recording head, 26・
... Recording paper, 27 ... Winding side roller,
28... Supply side roller, 29.f... Platen roller. Name of agent: Patent attorney Toshio Nakao (1st person)
figure

Claims (3)

[Claims] (1) An electrostatic recording head that forms a latent image on recording paper, multiple developing units installed near the recording head in the conveying direction of the recording paper and containing liquid toner of different colors, and each developing unit installed in A pneumatic device is provided near the corresponding recording paper and supports the recording paper by pneumatic action.When the recording paper is fed backwards after each color is developed, the pneumatic device moves the recording paper into the developing device. A liquid development color recording device characterized in that the recording paper is separated from the developer to prevent the recording paper from coming into contact with the developer. (2) The liquid developing collar according to claim 1, wherein the pneumatic device is provided on the opposite side of the developing device with respect to the recording paper, and sucks the recording paper during the reverse feeding operation of the recording paper. Recording device. (3) A pneumatic device is provided on the developing unit side with respect to the recording paper,
2. The liquid development color recording apparatus according to claim 1, wherein air is blown onto the recording paper during reverse feeding of the recording paper.