Apparatus for cleaning and developing dielectric receptor sheets

摘要

Apparatus for removing dust from dielectric receptor sheets which are about to be introduced into an ionography imaging chamber for exposure to object-modulated X-rays or for developing latent images on such sheets has a drum which rotates about a horizontal axis and has a first section of larger radius which is shorter than a sheet and a second section of smaller radius which is longer than a sheet. Both sections have suction ports and grooves which can attract sheets to their external surfaces. A sheet which adheres to the external surface of the second section bypasses the upper level of a supply of developing liquid in a tank which is located below the drum and is relieved of dust or other foreign matter by a corona discharge device which is operative when the second section carries a sheet. A sheet whose median portion is attracted to the external surface of the first section and whose leading and trailing portions extend inwardly to the level of the external surface of the second section is caused to move successive increments of its median portion into contact with the developing liquid when the drum is rotated. The thus developed image of the sheet on the first section is thereupon fixed by moving past a heating device.