G - Physics – 03 – G
Patent
G - Physics
03
G
314/7
G03G 13/04 (2006.01)
Patent
CA 1051084
A B S T R A C T A method and apparatus for impressing images on an electrophotographic film of the type whose sensitivity is variable with the level to which it is charged. The method herein particularly provides a step of measuring average light intensity and, simul- taneously charging and measuring the surface potential on the film. The pair of signals generated by such measurement are compared and a comparison signal is generated to initiate the step of exposing the charged film for a fixed or variable duration relating to de- creasing charge level or light intensity. Termination of the exposure step initiates a signal enabling a toning mechanism to apply toner to the resulting latent image. Toner is applied for a fixed time or a duration dependent upon the charge level. Termination of toning provides a signal enabling a toner removal arrangement, the termination of the operation thereof generating a signal enabling a fusing mechanism or a transfer and fusing mechanism to make the reproduction permanent. Each operation is sequential, with each step effecting the immediate operation of the following step.
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