SU414818A3 - DEVICE FOR MANAGING THE HIDDEN ELECTROSTATIC IMAGE - Google Patents

Description

one

The invention relates to electrophotography, in particular to devices for cascading the display of latent electrostatic images in electrophotographic machines.

A cascade device is known that contains means for forming a flow of the developer through the area of appearance, an electrode placed at some distance from the surface of the material carrying the projected image, means for communicating the oscillating motion electrode in a direction perpendicular to the flow of the developer. This device does not provide enough diffusion of the developer for high-quality blood and creating a strong field next to the developed image.

A distinctive feature of the device proposed is that the electrode is provided with pins protruding into the area of manifestation and located perpendicular to the electrode — at equal distance from one another in parallel rows. Each row is shifted in the transverse direction with respect to the previous one. The pins are located below the axis of the cylinder and are made of conductive material.

FIG. 1 shows a diagram of an electrophotographic machine with the proposed device; in fig. 2 - the proposed device.

The electrophotographic machine consists of the following units: charge 1, exposure 2, appearance 3, transfer 4 images and cleaning device 5.

The assembly 3 contains a reservoir 6 with an extension in which a bucket conveyor 7 is installed, which guides it to zone 8 of the active manifestation through the inlet tray 9. Profiled electrode 10 is installed in reservoir 6 parallel to the surface of cylinder 11 and forms an elongated manifestation zone.

The profiled electrode 10 may slide parallel and adjacent to the surface of the cylinder 11, leaving the manifestation zone 8 free to allow the developer to flow from the tray 9 to the tank tray

6. The electrode 10 is isolated from the tank body 6. The means of electrical bias 12 are connected to the electrode 10. As a result, the position and concentration of the developer is controlled within

flow.

On the electrode 10, perpendicularly, there is a row of pins 13 arranged in such a way as to facilitate the dispersion and scattering of the developer. The pins 13 are installed in parallel rows with uniform intervals, with each row being shifted in a transverse pattern to the previous row of direction. The pins are made of either conductive or insulating material.

The pins 13 are pushed or hit by the carrier balls, scattering over the appearance of the appearance. At the same time, the material of the TOYERA is removed from the surface of the balls to form a topper cloud. It should be noted that while the positel's balloons are scattered in the B zone and the toner is removed from the balls, the net weight of the builder passes through the zone of manifestation 8. However, due to the fact that the developing material is dispersed, the force field of the electrode, it acts faster on the charged topper particles, regulating its conceptrapy in the flow. In such a device, toner particles are triple electrically charged, acquiring a negative potential, a large negative charge is placed on the electrode, increasing the force field in the zone of development, introducing a large percentage of the powder into contact with the carrier image on top of the cylinder, where it is easily used .

Due to the fact that the force field of the solid sections is also changed by the electrode, the topper at the top of the cylinder quickly adheres to the charged areas of the image, thus quickly and efficiently producing an image, regardless of the state of its sections.

It is advisable that the pins be installed in parallel rows at even intervals, so that each kalad row is so confused that the developing material follows a relatively tortuous path through the harp. Thus, the maximum number of balls collides when moving the material through the development zone.

Conductive pins act in the same way as small individual point electrodes, reinforcing the power nol around the rod, helping to create an image. Conductive pins have been found to result in even-dimensional manifestation, causing visible rows of dark lines or nolos due to the pins of the localized power field close to the surface of the cylinder.

The electrode 10 may slide in a non-conductive retaining element and oscillate longitudinally the surface of the cylinder across the direction of flow of the reader. The engine 14 is installed in the support housing 15, and the latter is attached to the side wall of the tank with 6 screws or other means. The eccentric disk 16 is fixed on the engine shaft and has a driver pin 17, which is installed in it. The driver finger runs perpendicular to the disc and through the elongated hole a made at one end of the drive lever 18. The latter is made of an insulating material, passes through the hole in the wall of the housing and is attached to the opposite ends of the electrode. When

the motor rotates the eccentric disk, the lever moves the electrode back and forth in the sliding element to a distance equal to at least the lateral gap between the pins 13.

The frequency of the oscillations depends on the speed of the prop and the location of the pin in the developing zone. The optimum frequency will vary according to the system parameters. Correct sealing

a hole in the case of the protractor through which the lever 18 passes in order to prevent the protrusion of the protrusion from the tank 6.

Due to the fact that the electrode also enhances

The force field of the image components, the overall effect of the electrode for the developing system, is such that areas of the image of different sizes quickly and efficiently appear.

Subject invention

Claims (3)

1. A device for displaying a latent electrostatic image, comprising means for forming a flow of the developer through the zone of the phenomenon, an electrode placed at the surface of the cylinder, carrying an image and means for communicating the electrode with an oscillating motion in the direction perpendicular to the flow of the developer, characterized in that, in order to ensure dispersion of the developer in the zone of origin and the formation of a strong electric field near the surface carrying image, the electrode is provided with pins protruding into the zone of development and is located perpendicular to its surface at the same distance from one another in parallel rows, each row displacements in the lateral direction with respect to the previous one. 2. The device according to claim 1, characterized in that the pins are made of conductive material. 3. A device according to claim 1, characterized in that the pins are located below the axis of the cylinder. 14IHL