Apparatus for large scale screen display of images

Abstract From the Canadian patent

An electrophotographic film member is exposed to an image source, such as a cathode ray tube display unit, and the latent image toned to form a transparency carrying a temporary visible image on said film member at a first station. The film member carrying the temporary visible image is stepwise translated to a projection station where it is projected in an enlarged display upon a suitable receptor surface. Thereafter the film member is stepwise translated to an erase station where the toner is removed and the film member made ready for reuse to receive another image. The first station includes suitable structure for charging the film member, a selectively operable blind or shutter for …