| 摘要 |
PURPOSE:To avoid the generation of fog, by a method wherein in a toner system picture recorder, the magnetic pole of the same polarity as that of the top magnetic pole of the recording electrode is generated by a magnet at the iron core top of a pulse magnetic field generation measure when recording voltage is applied. CONSTITUTION:In the case of no application of a picture signal to a recording electrode 7, when a recording medium 1 is moved in the direction of A, the force moving toner T in the direction of D is operated. However, it is restricted with the line of magnetic force of a magnet 8 and the toner T does not flow to the downstream from the recording electrode 7. On the other hand, when a picture signal is applied, a pulse current is given to a coil 14 from a pulse magnetic field generator 12 and the magnetic material 13 is excited so that the magnetic pole of the same polarity as that of the magnetic pole generated at the top of the recording electrode 7 is generated at the one side top along the recording electrode 7 of magnetic material 13 with the magnet 8. The head of toner becomes almost perpendicular to the recording medium 1 and a toner image is formed with a picture signal voltage. Then, when the signal voltage disappears, the application of electricity to the coil 14 is stopped and the unnecessary toner is restricted with magnetic field. Thus, the fog is prevented. |
