PRINTING MACHINE EQUIPPED WITH READJUSTMENT TYPE LIGHT SOURCE

PROBLEM TO BE SOLVED: To enable it to reduce the problem of after-images in an electrostatic photographic printing machine. SOLUTION: The electrostatic photographic printing machine is equipped with (a) a photoreceptor having an image domain, and (b) at least one electrostatic charging device generating a plurality of complementary electrostatic latent images to the image domain so that they may correspond with the image and at least one image forming device. The charging device and the image forming device generate a change in the amount of the electrostatic charge captured by a plurality of different parts of the image domain about each of the complementary electrostatic latent image by charging nearly uniformly the image domain and discharging in an image shape at the time of forming a plurality of complementary electrostatic latent images. Thereby, residual voltage difference is generated in different parts or the image domain. Furthermore, the printing machine includes (c) a plurality of developing devices for complementary electrostatic latent images, (d) a charge eliminating device which sends charge dissipation radiation to the photoreceptor so as to reduce the amount of the surface charge, (e) a light source for readjustment which generates a uniform residual voltage inside the different parts of the image domain by sending light beams to the photoreceptor so as to reduce the change of the charge amount captured by the different parts of the image domain.