Abstract:
In an electrographic printing system, a multiple row electrode structure wherein successive rows are mutually spaced from each other, each row including mutually spaced electrodes, the electrodes of successive rows being positioned in a staggered manner with respect to each other. The system further comprises improved electrode drive circuitry, including a plurality of high-voltage drivers and a selection matrix wherein a plurality of passive elements are coupled to the drivers. A plurality of output lines couple the matrix to the electrodes so as to selectively apply a high voltage to the electrodes in order to produce a latent image on a dielectric medium. Toning means subsequently make the latent image visible.
Abstract:
An electrographic recording surface is provided by forming a porous metal oxide coating on a conductive substrate and then completely impregnating the oxide coating with an electrographic imaging material such that the imaging material is in contact with the conductive substrate.
Abstract:
A high-speed electrostatic printing mechanism including a hollow-type roll presenting a concave matrix of raised font electrodes, the electrodes being configured as different alphanumeric print characters; and, arranged in image-able relation with the electrode array, a plurality of dielectric segments, each of approximately ''''printline height'''' and mounted on a propeller arm to be swept past the concave matrix for receiving character images therefrom.