ELECTROSTATIC RECORDING DEVICE

摘要

PURPOSE:To easily form an excellent image at low cost irrelevantly to the thickness of a recording material by controlling a recording signal voltage by a device which performs recording, development, and image transfer at the same time according to the thickness of the recording material. CONSTITUTION:A piezoelectric sensor 19 outputs a paper thickness detected value to a recording voltage control circuit 24 according to variation in the pressure of a coil spring 20 with the paper thickness of the recording paper P. The circuit 24 applies the recording voltage 4f corresponding to the detected value of the sensor 19 to an auxiliary electrode 21 and also applies it to the segment electrode 4d of a printing head 4 through a driving circuit 26 and a switch 4e according to image information. A linear electrode 4g which is laid on a screw ball 4b is grounded. Consequently, the recording voltage is controlled to the best voltage to obtain a sharp image with sufficient density at low cost by the simple constitution irrelevantly to the paper thickness.