| 摘要 |
<p>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, simultaneously 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 decreasing 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.</p> |
