Electrostatic printing and copying

Abstract From the Canadian patent

Electrostatic printing is disclosed in which an electrostatic latent image is formed on an imaging roller toned, and transferred by pressure to plain paper. Toner transfer efficiency is improved by providing a skew between the dielectric imaging roller and a pressure roller. The latent image is formed by an ion generator consisting of two electrodes separated by a mica dielectric. The ion generator is fabricated by laminating a metal foil to mica using pressure sensitive adhesive, and etching the foil to form electrodes. An alternative ion generator consists of a dielectric-coated wire and a series of transverse conductors. A preferred method of fabricating the dielectric roller involves …