System for control of contrast of image in a system eletrostatográfico training images.Process for the production of images semitonalizadas in a copy machine and printing machine eletrostatográfica el

摘要

"System for control of contrast of image in a system eletrostatogru00e1fico training images.Process for the production of images semitonalizadas in a copy machine and printing machine eletrostatogru00e1fica eletrostatogru00e1fica ".This is a copier eletrofotogru00e1fica adapted to operate either in a functional mode, in a pictorial mode, such that, in the way the pictorial.A signal light is transmitted through a screen element separation lines to modulate a latent electrostatic from an original document.The quantity of light transmitted through the screen separation of the lines is made to vary as a function of the amount of light used to generate the electrostatic latent image to control the contrast of theThe image generated in this way.As a result,The contrast of the pictorial image is readily adjustable regulating is the luminous intensity of the light transmitted through the screen element separation lines and on the surface photo conductive pTo obtain high quality pictorial copies in a copier eletrostatogru00e1fica.