Abstract: A process for preparing arsenic-selenium photoreceptors wherein the arsenic distribution in the photoreceptor, particularly at its top surface, is controlled within a preferred concentration range, which comprises controlling the evaporation rate of the arsenic-selenium alloy by means of a crucible weight sensing system to monitor alloy depletion rate and a cascade dual-loop feedback control system processing both crucible assembly weight change and temperature to modify resistive power input.

Abstract: Imaging apparatus which employs MANIFOLD imaging techniques and reusable loops to create a marking material image and transfer it to a receiving medium. The apparatus may be employed in a printer having keyboard input and an elongate platen supporting a receiving medium along which the imaging apparatus moves, in which individual characters are projected from a character disc through a fracturable layer onto a dielectric web, from which the images are transferred subsequently to the receiving medium by a retractable transfer member.The apparatus may be employed in a printer having keyboard input and an elongate platen supporting a receiving medium along which the imaging apparatus moves, in which individual characters are projected from a character disc through a fracturable layer onto a dielectric web, from which the images are transferred subsequently to the receiving medium by a retractable transfer member.