SU1449965A1 - Apparatus for dynamic charging of electrophotographic information carrier - Google Patents

Abstract

The invention relates to a device for dynamically charging an electrophotographic carrier and allows for improving the quality of charging. The device contains two electricians 1 and 2, the electrician 2 has a control grid 7, a high voltage source 3, a current regulator 4 of the electrician 2 connected to the control grid 7 and an input of the high voltage source 3, and the electric grid 2 is electrically connected with its screen 6. The ratio of the electrical capacitance of the intervals of the corona electrode - -tioBepxHocTb. The photofloor and the corona electrode - the control panel. The mesh is located in the chefelac 0.05 - 0.15. I p.

Description

10 1

/ / 7 2 / "/

The invention relates to electrography / in particular, to a technique for recording information on electrographic layers subjected to sensing in a corona discharge.

The aim of the invention is to improve the quality of charging.

The drawing schematically shows a device for dynamically charging an electrophotographic carrier.

The device contains electrics

1 and 2, a high-voltage source 3 and a stabilizer 4 of the electrician 2 current. The electricians 1 and

2. There are corona-carrying wire electrodes 5 and screens 6. An electrician 2. has a control grid 7 electrically connected to its screen. The corona electrodes 5 of the electrifiers 1 and 2 are connected to one of the poles of the source 3 of the high voltage. Electric screen 1

and the screen and grid of the electrician 2 are connected via the corresponding resistances 8 and 9 to the second pole of the source 3. Stabilizer A is connected between the grid 7 of the electrician 2 and the input of source 3. Its design includes a comparator and an amplifier, the output signal of which controls the output voltage source of high voltage. Electrophotographic information carrier 10 is moved above the electrifiers.

 The device works as follows.

When the source is turned on in a strong electric field, near the corona electrodes 5, ionization processes begin. The formed ions are transported by the field through the external zone of the discharge towards the screen or the grid and layer, deposited on the last Leak through the resistors 8 and 9, the current creates an offset on the screens 6 and the control grid 7. The magnitude of the voltage drop across the resistor 9 controls through the stabilizer 4 by the input voltage of source 3 and thereby

ten

15

20

25

maintains the potential at its output so that the magnitude of the current of the screen and the grid of the electrician 2 is constant.

The information carrier 10, moving over the charging device, is initially charged by the electri- cal device 1, and then recharged by the electrolyzer 2. Due to the stabilization of the grid current and the screen of the electrician 2, the corona-like electrode of which is connected to the corona electrode of the electrizer 1, as well as electrical connection of the grid and the screen of the electrician 2 eliminates the effect on the level of charge of atmospheric conditions and instability of the source of high voltage.

Ratio of the electrical capacitance of the spaces, the corona electrode - the surface of the photoflo and the corona electrode - the control grid, closed in the range of 0.05-0.15.

Claims (2)

Invention Formula 35 A device for dynamically assigning an electrophotographic information carrier, comprising two electrisers with screens and a control grid on a second electrizer and a high-voltage source connected to the corona electrodes of both electrifiers, successively located along the carrier’s movement, the purpose of increasing the quality of charging, it contains a current stabilizer of the second electrizer, connected to the control grid and the input of the high voltage source, while controlling the grid is electrically connected to the screen, and the ratio of the electrical capacitances of the gaps, the corona electrode — the surface of the photo layer and the corona electrode — controls the grid within the range of 0.05-0.15. 40 45 50 Compiled by V.Aksenov Editor V.Danko Tehred L. Serdyukov. Proofreader A. Obruchar Order 6966/47 Circulation 442Subscription VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR i 113035, Moscow, Zh-35, 4/5 Raushsk nab. maintains the potential at its output so that the magnitude of the current of the screen and the grid of the electrician 2 is constant. The information carrier 10, moving over the charging device, is initially charged by the elec- trical device 1, and then discharged by the electrolyzer. 2. Due to the stabilization of the grid current and the screen of the electrizer 2, the coroniruki of the electrode of which is connected to the corona electrode of the electrizer 1, as well as the electrical connection of the grid and the screen of the electrizer 2, the influence on the level of atmospheric conditions and instability of the high voltage source is excluded. Ratio of the electrical capacitance of the spaces, the corona electrode - the surface of the photoflo and the corona electrode - the control grid, closed in the range of 0.05-0.15. Invention Formula A device for dynamically charging electrophotographic information, containing successively two electrisers with screens and a control grid on the second electrizer along the carrier's movement and a high-voltage source connected to the corona electrodes of both electrifiers, characterized in that charging quality, it contains a current regulator of the second electrizer, connected to the control grid and the input of the high voltage source, while controlling a guide grid is electrically coupled to the screen, and the ratio of capacitances intervals corona electrode - the surface of the emulsion and koronirukschy electrode - control kscha mesh is in the range 0.05 - 0.15.