(57) Improved electrophotographic apparatus and method for use with electrophotosensitive
toner are disclosed for electrophotographic imaging. Improved image density, color
separation and toner background depositation levels are achieved by triboelectrically
charging a dry, powdered, electrophotosensitive loner by interaction with an applicator,
e.g., a magnetic brush 12 Figure 1, and then moving such toner into contact with an
oppositely-charged electrode member 2. Upon exposure of a light image of an original
at the interface between the toner and image electrode, the unexposed toner particles
transfer to the tmage electrode and the exposed particles are discharged and not deposited
on that member. A positive reproduction of the original is thus formed.
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