JPS6167054A - Both-surface recording device - Google Patents

Abstract

PURPOSE:To simplify a conveyance path for recording and shorten a recording time by transferring an image to one surface of a sheet type recording body and then making a U turn near the transfer position, conveying the recording body to the transfer position from its rear end, and transferring an image to the reverse surface of the recording body. CONSTITUTION:An electrostatic charger 2, developing device 3, transfer roller 4, and cleaning device 5 are arranged at the periphery of a drum type photosensitive body 1 in the rotating direction, and a pressure roller 6 which incorporates a heater is arranged in the transfer roller 4 so as to rotate in press contact. The transfer roller 4 is made of a heat-resisting elastic body such as silicon rubber, 'Teflon', or fluororesin, and incorporates the heater and has a sticky surface. When an optical image of a recording picture is projected from an optical system on the photosensitive body 1 which is charged uniformly by an electrostatic charger 2 to form an electrostatic latent image. The electrostatic latent image formed on the photosensitive body 1 as mentioned above is developed by a developing device 3 into a visual image M, which is transferred to the roller 4 through the pressing operation of the transfer roller 4.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application in the Funeral Industry) The present invention relates to a screen recording device that can shorten the recording time by simplifying the conveyance path of recording paper.

(B) Prior Art Conventionally, automatic double-sided recording devices that automatically record images on both sides of recording paper are known. Many of these types of recording devices use a method that records an image on one side of the recording paper, then flips the recording paper and records the image again on the back side. A stacking mechanism is provided to temporarily store the recording paper on which the recorded information is recorded. However, some recording apparatuses are provided with only a reversing machine No. t1 without a stacking mechanism.

Specifically, a vacuum reversing roller is provided between the first transfer section and the second transfer section, and after recording on one side of the recording paper in the first transfer section, the recording paper is reversed, and then transferred to the second transfer section. Record the back side.

On the contrary, 1 tan, only a stack mechanism is provided without a transmission mechanism,
There is also a type in which the stacking mechanism switches back the recording paper and sends out the recording paper in the same direction as the direction in which it is fed into the stacking mechanism, so that the stacking mechanism also serves as the reversal of the recording paper.

In either format, the path from the time the recording paper is fed to the time it is ejected is long, which increases the time required for double-sided recording, making it unsuitable for high-speed recording, and requiring two transfer units. The problem is that the mechanism becomes complicated.

c/) Object and structure of the invention The present invention has been made in view of the above points, and an object of the present invention is to provide a double-sided recording device that can simplify the recording conveyance path and shorten the recording time. In order to achieve this, after an image is transferred to one side of a sheet-like recording medium, the recording medium is conveyed by making a U-turn near the transfer position, and then conveyed from the rear end of the recording medium to the transfer position, and then It was designed so that the image could be transferred to the back side.

(in) Example The present invention will be explained below based on the drawings.

FIG. 1 is a schematic diagram of essential parts of an embodiment of a double-sided recording apparatus according to the present invention, and illustrates a specific method using an intermediate transfer roller.

In the figure, l is a drum-shaped photoreceptor that can rotate in the direction of the arrow;
Charger 2. Developing device 3. Transfer roller 4. A cleaning device 5 is provided. A pressure roller 6 with a built-in heater is arranged so as to be in pressure contact with the transfer roller 4 and rotate.

The transfer roller 4 is made of a heat-resistant elastic material such as silicone rubber, Teflon rubber, or fluorine rubber, has a built-in heater, and has an adhesive surface to remove the developer remaining on the surface after transfer. A cleaning roller is provided so as to rotate in contact with the cleaning roller.

On the other hand, 8a and 8b are registration rollers 9 that temporarily stop the recording paper P pulled out from a paper feed cassette (not shown) and feed the paper to the transfer position in accordance with the timing of the recording cycle.
11 is a guide roller that conveys the recording paper after image transfer to one side to a stacker 10 for temporary storage, and 11 is a stacker L.
A pair of rollers are arranged near the population of O, 12 is a recording paper guide plate, 13 is a peeling claw that takes the solid line position and the broken line position in synchronization with the recording cycle, and 14 is a pair of discharge rollers. . In addition, a stacker 1 is placed immediately before the pair of rollers 11.
A sensor 15 is provided to detect the trailing edge of the recording paper fed into the recording paper.

Now, when an optical image of a recorded image is projected from an optical system (not shown) onto the photoreceptor I uniformly charged by the charger 2, an electrostatic latent image is formed. The electrostatic latent image thus formed on the photoreceptor L is developed by the developing device 3 to become a visible image M. The visible image M is transferred to the roller 4 by the pressing action of the transfer roller 4.
transcribed into.

Now, to explain the subsequent movement of the recording paper with reference to FIG. 2, the paper feed cassette (
The timing at which the recording paper P (with a white circle on the leading edge), which has been pulled out from the printer (not shown) and is in a standby state after being stopped by the registration rollers 8a and 8b, coincides with the leading edge of the visible image M on the transfer roller 4. Then, the paper is fed by registration rollers 8a and 8b through path a toward the transfer position (see Fig. 2).
b) see). When the recording paper P passes between the transfer roller 4 and the pressure roller 6, the visible image M is transferred and fixed on one side of the recording paper P by the pressure and heat received. At this time, the peeling claw 13 is at the position indicated by the solid line, so that after the transfer, the recording paper P wraps around the highly adhesive suppression roller 6 and passes through the path (Fig. 2 (b)).
), and is conveyed by guide roller No. 9 along the guide plate 12 (see FIG. 2 ( )).

It is fed into the stacker 10 by a pair of rollers 11 (see FIG. 2(d)). When the sensor 15 detects the rear end of the recording paper P, the roller 11 stops, and the recording paper P enters a standby state in the stacker 10 for recording the back side.

Next, a visible image N to be recorded on the back side of the recording paper is formed on the photoreceptor l in the same manner as described above.

After being transferred to the transfer roller 4, the recording paper P waiting in the stacker 10 is sent to the transfer position through the path C by a pair of rollers 11 at a timing that coincides with the leading edge of the image. (See Figure 2 (e)). At the transfer position, as described above, the visible image on the transfer roller 4 is transferred to the recording paper P.
The back side of the image is transferred twice (see Figure 2). At this time, since the peeling claw 13 is at the position of the broken line, the recording paper after transfer is peeled off from the suppression roller 6 (see FIG.
The paper passes through the paper and is discharged by the paper discharge roller 14 (see FIG. 2(H)).

In this way, the recording paper is conveyed to the transfer position, the transfer roller transfers the image onto one side of the recording paper, and after the transfer, the recording paper is made a U-turn near the transfer position and conveyed, and then the trailing edge of the recording paper is Since the paper is conveyed to the transfer position and transferred from the transfer roller to the back side of the recording paper, the conveyance path of the recording paper is shortened.
The time required to record on both sides of a sheet of recording paper can be reduced.

In addition, although the above-mentioned embodiment illustrated a recording method in which transfer is performed from a transfer roller serving as an intermediate transfer member to a recording paper, the present invention does not use an intermediate transfer member and directly transfers data from a photoreceptor or dielectric to a recording paper. The present invention can also be applied to recording devices using the above-mentioned method.

(As described in detail of the present invention, 1) the present invention conveys a sheet-like recording medium to a transfer position, transfers an image from a security special holiday to one side of the recording medium at the transfer position, and transfers the recorded body after the transfer. After making a U-turn near the transfer position and conveying it, the recording medium is conveyed from the rear end of the recording medium to the transfer position.

Since the image is transferred to the back side of the recording medium, the mechanism for reversing the recording body is simplified and the conveyance path is shortened, so the time required for RW surface recording is shortened, and it is suitable for high-speed recording.

In addition to the above configuration, if a stacker is provided to temporarily store the recording medium after recording on one side, and transfer and fixing are performed simultaneously, the transport path of the recording medium can be effectively shortened.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of the main parts of a double-sided recording device according to the present invention;
FIG. 2 shows eight sheets of recording paper in a double-sided recording device according to the present invention.
It is a figure explaining a moving path. l... Photoreceptor 2... Charger 3... Developing device 4... Transfer roller 5... Cleaning device 6... Pressing rollers 8a, 8b... Registration roller IO... Stacker ・12... Guide plate 13... Peeling claw 14... Paper ejection roller 1
5...Sensor 10; SO

Claims (1)

[Claims] A sheet-like recording medium is conveyed to a transfer position, an image is transferred from an image carrier to one side of the recording body at the transfer position, and the recorded body after transfer is made a U-turn near the transfer position and conveyed, and then recording is performed. A double-sided recording device characterized by conveying an image from the rear end of a recording body to a transfer position and transferring an image to the back side of a recording body.