A new queueing strategy for the Adversarial Queueing Theory

A print head in which an electrostatic character image is formed on a print drum by direct contact with electrodes, developed and printed out all within the same revolution of the drum. The characters are generated electronically using a keyboard or data terminal. The drum may be made small and the print head take the form of a hand-held printer. While retaining its small diameter the drum may be extended axially to form a line printer.