Abstract
A new developing method for the xerography using divided electrostatic capacities with the purpose of preventing edge effect was investigated.
Electrostatic capacity between two grounded plane electrodes was divided by the inserted photocoductive selenium layer into three parts C1, Cs and C2; existing between the upper electrode and the selenium, the selenium itself, and between the selenium and lower electrode respectively.
The capacity C2 prevented the concentration of electric lines of force in the selenium, so the field strength distribution adjacent the edge of latent charging image on the selenium was not so discrete than that of the usual cascade method, in which the edge-effect in developing process refused the reproduction of original patterns to great extent.
Developed patterns with much reduced edge-effects were successfully obtained under various conditions in which the electric field in C1 were directly controlled by those of backing capacity C2.
