Electrostatic recording apparatus and method

Abstract

The disclosure is of electrostatic recording apparatus including a plurality of groups of printing electrodes on one side of a sheet of printing paper and a plurality of base or counter electrodes on the other side of the paper. Corresponding electrodes in each group of printing electrodes are connected together to form sub-groups of printing electrodes. Data signals, to be printed, are connected to electrodes in all of the sub-groups of printing electrodes at the same time, and selected base electrodes are energized to select the associated printing electrodes which actually perform a printing operaion. According to the invention, the counter electrodes are operated in pairs, with two adjacent counter electrodes being energized at any instant. However, the counter electrodes are not operated sequentially in pairs, buy they are paired randomly in the series, with favorable spacing being provided between sequentially operated pairs.