1990 Volume 29 Issue 1 Pages 14-25
In the electrophotography “One Drum Color Superimposing Process”, a toner flying development method is employed for color superposition on a photoconductor. The resolving power of this development method is analized relating to various factors such as developing gaps, toner charge, thinckness of toner layers, etc. In addition, a relation between exposure and development is studied. Obtained results are as follows:
(1) Toner with low charge can fly to a latent image, but toner with high charge cannot fly from the developing roller.
(2) Exceedingly thick toner layer on a developing roller causes background, 6ven if there is no reversely charged toner.
(3) In the comparison between 240 dpi and 400 dpi, not only the potential width of 400 dpi becomes narrower, but also its potential well becomes shallower.
(4) Adjacent lines of 400 dpi give an influence to each other at the time of development, even if each exposed line is independent. Potential of a peak between exposed lines drops to about 500 V, which level is easy to be developed when high bias voltage is applied.
From these analyses, optimal conditions of toner flying development and exposure are determined. These resultant specifications are adapted to the “Panasonic FP-C1” digital color copier.
