SU387402A1 - DEVICE FOR ELECTROSTATIC INFORMATION RECORDING - Google Patents

Description

one

The invention relates to a recording apparatus, in particular, to an apparatus for electrostatic recording with the aid of electron-electron tubes (CRT) with a metal fiber screen.

The quality is depicted and the speed of electrostatic recording using electrophore tubes with a metal fiber screen is determined largely by the electrical processes in the system: screen conductor - air gap-carrier information - counter electrode.

The discharge voltage depends on the gas pressure, the length of the discharge gap, the composition of the gas, and the degree of ionization of the gap. Unless special measures are taken, the discharge stability deteriorates over time. One way to ensure stable recording is to use high accelerating voltages.

In the known devices for electrostatic recording of information, containing a cathode tube with a metal fiber screen and conductive protrusions, an accelerating voltage source, an electron beam deflection and control unit, a dielectric carrier, the substrate of which is connected via a counter electrode to a variable high frequency signal source. However, these devices do not ensure the stability of the pulse discharge in the discharge gap, which leads to unstable unstable recording.

The purpose of the present invention is to improve the stability of the recording and reduce the magnitude of the accelerating voltage of a CRT, which improves the quality and reliability of the recording. For this, the conductive protrusions are placed on both sides of the metal fiber screen and are connected to a variable high frequency signal source.

The drawing shows the proposed device.

It contains a cathode-ray tube / with a metal fiber screen 2 and conductive protrusions 3 located on both sides of the metal screen at a distance that provides a field strength

not less than 10 V / cm and greater than the size of the discharge gap, in contact with which dielectric carrier 4 moves. Cathode 5 is connected to the negative terminal of the accelerating voltage source 6. Control grid 7 is connected to the signal source 8. Anode 9 served ground potential. The deflecting coil 10 is controlled by the source of the deflection of the signal 11. The carrier substrate is through a counter electrode 12

connected to a variable signal source

high frequency 13. At the same time, source 13 is connected to conducting protrusions 3 on a CRT screen.

The device works as follows.

When the beam hits the inner ends of the conductors of the CRT screen 2, their potential decreases dramatically, causing a microscopic air gap to break through, fixed by Conductive protrusions 3 on screen 2 between the outer ends of the conductors and the surface of the carrier 4. under the action of the total electric field (.Registered signal and -signal variable frequency),. existing between the conductors of the screen 2 and the counter-electrode 12, deposited on the surface

carrier 4, creating a hidden electrostatic image.

Subject invention

A device for electrostatic recording of information containing a cathode ray tube with a metal fiber screen and conductive protrusions and a dielectric carrier, the substrate of which is connected to a variable high frequency signal source via a counter electrode, characterized in that, in order to improve stability and improve the quality and reliability of the recording, in it, the conductive protrusions are located on both sides of the metal fiber screen and are connected to a variable high frequency signal source.

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