Abstract: An electrostatic imaging process uses either a moving belt or a rotating drum with an insulative or dielectric layer backed by a conductive layer. A matrix of writing styli are used to charge the dielectric layer which are ionized air jets. After the image is developed by a toner, the toner is heated so that it will be concurrently transferred and fixed to the paper sheet.

Abstract: Printing apparatus uses a daisy type print wheel which is continuously driven through a magnetic clutch arrangement. Characters are selected by actuation of either an electromagnetic brake acting on the print wheel or a toothed character selector acting on the spokes of the print wheel. When a character is selected and the print wheel is stopped, rotation of the motor continues because of the slippage of the magnetic clutch. Other features of the invention include a fast recovery time for the hammer because of its constant rate of actuation, a change in spacing by varying this constant rate and also an improved carriage scan technique which provides for fast return.