ELECTROSTATIC RECORDING APPARATUS

摘要

PURPOSE:To provide an electrostatic recording apparatus which can stably form a recording image with smooth density gradation characteristics even though a developer is carried by rotating a magnetic roll. CONSTITUTION:A magnetic roll 16 is built rotatably in a developing sleeve 15. A step difference G is formed on a part being close to the peripheral surface of a cylindrical electrode 5 on the peripheral surface of the developing sleeve 15 and a recording electrode sheet 17 is clad on the peripheral surface on the upstream side from the step difference to the toner carrying direction. A lot of recording electrode wirings 17a the apex parts of which are recording electrodes EL are placed on the recording electrode sheet 17. A magnetic sensor 18 detecting arrangement of magnetic poles on the peripheral surface of the magnetic roll 16 is placed and a recording control part C changes the pulse width of a pulse voltage based on a detected signal of the magnetic sensor 18 to obtain a recording image provided with density gradation within the time where the magnetic roll 16 rotates from a magnetic arrangement wherein ears of a magnetic toner (d) on the magnetic electrode EL are stood vertically to the peripheral surface of the cylindrical electrode to a magnetic arrangement wherein they are laid down in parallel.