Abstract
This paper describes a recording process that exposes and develops at the same time, and the conditions involved.
The magnetic bursh development unit and the image exposure system are on opposite sides of a photoconductor having a transparent base. A toner image is poduced on the photoconductor in two steps: First, the image is exposed from the back of the photoconductor when the toner is uniformly developed via a stripe electrode on the development unit. Second, unexposed is electrostatically collected in a developer pool near the stripe electrode by a scavenging voltage.
We defined the printing conditions and manufactured a prototype printer. The printer contains a development unit having a stripe electrode, LED array optic, transfer roller, an erase lamp, and a fuser unit, on a recording medium consisting of an organic photoconductive film belt. The developer is consisting of magnetic insulating toner and carrier with magnetic conductive smaller particles. The printer produced a satisfactory plain-paper printout with an optical density of 1.0.
Since this recording process does not use corona charging which is essential for the conventional electrophotographic process, a simple recording system is possible that does not generate ozone. Furthermore, the toner is reusable in this system. There is no waste, thus ensuring economical operation.
