JPS61118782A - Developing and cleaning device - Google Patents

Abstract

PURPOSE:To perform development and cleaning within a small space by fitting a developing electrode and an ultrasonic wave oscillation device to a developer dish wherein a photosensitive body is dipped as to a liquid transfer type electrophotographic device. CONSTITUTION:The photosensitive film 2 charged by a corotron generating device 12 is exposed at an exposure position 10 and then dipped in the developer in the developer dish 20 to stock part of toner suspended in a solvent on the surface of the photosensitive film. Then, the surfaces of an exposed part and a toner sticking part are changed positively by a precharging device 40. A transfer material 44 is pressed at a transfer position 42 and the pressing of the transfer roller 48 operates on the photosensitive film 2 and transfer material 44 through cloth 46 to move the toner stuck on the photosensitive film 2 to the transfer material 44 and fix it. The film 2 moves continuously to enter a developing and cleaning device 14, where the ultrasonic oscillation device 26 operates to clean the surface of the photosensitive film 2 with the developer on an ultrasonic basis, thereby completing one operation of transfer.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention provides an electrophotographic image formed on a photoreceptor, for example, on an offset plate or Peno J? It is related to the development and cleaning device of the device for transferring onto substrates such as -.

Here, development means to visualize the latent image formed on the photoreceptor with toner, and cleaning means to remove the toner remaining from the photoreceptor after transfer.

[Prior art]

In a device that transfers an electrophotographic image formed on a photoreceptor onto a substrate, a conventional device for developing and cleaning the photoreceptor is one that is equipped with a developing device and a cleaning device independently. ! Although it has been proposed in Publication No. 9-8 Core, there is no mention of the specific structure of the cleaning device.

[Problem that the invention seeks to solve]

The above-mentioned conventional apparatus including a developing device and a cleaning device independently has a problem in that it requires the second largest space after the developing device and cleaning device. ′
! Note that if a cleaning device uses a blade or a scrubber, such as in an electronic copying machine used for general office use, cleaning residue on the photoreceptor becomes a problem, especially in devices that require precise images. Furthermore, when the width of the photosensitive plate/substrate is wide, non-uniform cleaning becomes noticeable, and cleaning residue becomes a serious problem.

The present invention has been made in view of the above-mentioned problems of the conventional wet transfer amount electrophotographic apparatus, and it integrates a developing device and a y-ning device to reduce the space required for the same.
Further, it is an object of the present invention to provide a developing cleaning device that can perform cleaning/cleaning over the entire width of a photoreceptor even when the width of the photoreceptor is wide.

[Structure of the invention]

The present invention has the following structural features in order to achieve the above object. That is, the present invention provides an apparatus for transferring an electrophotographic image formed on a photoreceptor onto a substrate, in which a developer passage for immersing the photoreceptor is equipped with a development electrode and an ultrasonic vibration device.

In one embodiment of the present invention, the developing electrode is arranged close to the photosensitive surface of the photoreceptor, and the ultrasonic vibrating device is configured by attaching an ultrasonic vibrator to the bottom plate of the current hydraulic pressure. .

[Example] Below, an example of the anodized aluminum alloy for offset of the present invention will be described with reference to the drawings. A drum 1 rotating clockwise in the figure has a photoreceptor film 2 wrapped around its outer peripheral surface. The photoreceptor film 2 is formed into a cylindrical shape by pasting a heat-shrinkable film 6 through a double-sided adhesive tape 4, and is later shrunk by blowing hot air onto the heat-shrinkable film 6IIc to form a photoreceptor film. 2 is fixed to the outer peripheral surface of the drum 1.

The top 10 of the rotary drum 1 is an exposure position, and a document image is formed there by an optical device (not shown). A cotron generator 12 to which 14 KViC is applied for charging the photoreceptor film 2 is disposed at a position offset from the top 10 of the rotating drum 1 by about 1S0 in the counterclockwise direction. Charge to one electric charge.

A developing and cleaning device 14 for developing and cleaning the photoreceptor film 2 is disposed below the rotating drum 1. The developer cleaning device 14 includes a developer tank 18 for accommodating a solvent in which toner particles are suspended, that is, a developer 16, and a developer tank 18 for accommodating a developer 16, which is a solvent in which toner particles are suspended, and a developer tank 18 for accommodating a developer 16 in which the photoreceptor film 2 is immersed.
It has a developer passage 20 for accommodating the developer. An outlet 22 is provided at the bottom of the developer tank 18, and a first fl inlet 24 is provided at the side wall.
Further, a first inflow port 25 is connected to the bottom of the developer passage 20, and the developer flowing out from the outflow port 22 is sent to the first inflow port 24 by a pump device (not shown) to the developer tank 18. The developer inside is stirred, and again! ! The photoreceptor film 2 is sent to the four-way inlet flow 25 and immersed in the developer passage 20, and then overflows from the pressure and returns to the developer tank 18.

The developer passage 20 also includes a developer electrode 23 placed close to the photoreceptor film 2 and applied to -5O to -OQ gel, and an ultrasonic vibration device attached to the bottom plate 50 of the dish 20. 26. The ultrasonic vibration device 26 is attached to the bottom plate 2
4 to cause ultrasonic vibration to clean the photoreceptor film 2 through the developer.

The developing cleaning device 14 further includes a toner collecting device 30 on the advancing side of the plate 20 in the clockwise direction with respect to the P ram I. The toner collecting device 30 is arranged so as to be in contact with the surface of the photoreceptor film 20 and to be in pressure contact with a roller 32 and a toner collecting roller 32 rotating clockwise in the figure. and a roller 32
is applied to between -50 and 100°C to attract floating toner that is not subjected to development in the solvent and adheres to the storage medium 34. The toner and solvent adhering to the cartridge 34 drop into the developer tank 18.

On the clockwise advancing side of the developing cleaning device 14 with respect to the drum 1, a pre-charging device 40 is provided which applies +6 kilogelt to charge the exposed surface of the photoreceptor film 2 and the surface of the attached toner to a charge of +6 kg. do.

The clockwise advancing side of the precharge device 400 regarding the drum IIC, that is, the horizontal left lateral position 42 of the drum 1 is the transfer position. A transfer material 44 such as an offset plate is supported by a transfer material moving device (not shown) so as to be in contact with the photoreceptor film 2 at the transfer position 42 and move in the same direction at the same speed. The transfer material 44 is further moved to -Kokiro? at the transfer position VC. K is applied to the transfer row 248 whose outer periphery is covered with a cloth 46 containing natural fibers. The transfer roller 48 is formed of aluminum into a cylindrical shape with an outer diameter of θ and a roll length of j3.

In the above configuration, the photoreceptor film 2 charged by the corotron generator 12 is placed at the exposure position 10 as follows:
The photosensitive surface is then exposed to light in a developer pan 20 and then immersed in a developer solution so that some of the toner suspended in the solvent adheres to the photosensitive surface. Subsequently, the photoreceptor film 2 is coated with a solvent layer containing residual toner on the photoreceptor surface, and then transferred to the toner recovery device 3.
0&C, where the floating toner in the solvent is removed by the toner recovery row 232 and returned to the developer tank 18 via the inlet 34.

Next, the surface of the exposed portion and the toner-attached portion of the photoreceptor film 2 is fully charged by the precharging device 40. Subsequently, the photoreceptor film 2 is placed at the transfer position 42.
The transfer material 44 is pressed, and the transfer roller 248 is applied to the cloth 4.
6 acts on the photoreceptor film 2 and the transfer material 44, and the toner adhering to the photoreceptor film 2 is transferred to the transfer material 44 and transferred.

The transferred transfer material 44 is fixed by a known method.

On the other hand, the photoreceptor film 2 that has been transferred continues to move and advances to the developing and cleaning device 14, where the ultrasonic vibration device 26 is activated and the surface of the photoreceptor film 20 is subjected to ultrasonic wave +7 by the developer. ＋ = y-gagged・
One transfer operation is completed. It is only necessary to rotate it in the same direction as the drum 1.

〔effect〕

As explained above, since the developer tray is equipped with a developer electrode and an ultrasonic cleaning device, development and cleaning can be performed with a small swipe, and even when the width is large, the width of the photoconductor This has the effect that the entire photosensitive plate after transfer can be almost completely cleaned by ultrasonic waves.

A simple explanatory diagram ii'i of the shoulder circumferential surface is a sectional view of a developing cleaning device and a drum according to an embodiment of the present invention.

1...Drum 2...Photoreceptor film 4...Double-sided adhesive tape 6...Heat-shrinkable Film 12...
・・・Corotron generation *Irt14・・・・・・・・・
Developer cleaning 18...Developer tank 20...Developer pan 22... Outlet

Claims (2)

[Claims] (1) Amount of Wet Transfer In an apparatus for transferring an electrophotographic image formed on a photoreceptor onto a substrate in an electrophotographic apparatus, it is noted that the developer tray in which the photoreceptor is immersed is equipped with a developing electrode and an ultrasonic vibration device. Characteristic development cleaning device. (2) The developing electrode is disposed close to the photosensitive surface of the photosensitive member, and the ultrasonic vibrating device is configured by attaching an ultrasonic vibrator to the bottom plate of a developer tray. development cleaning device.