Abstract: A color image forming apparatus wherein an image forming body has a inner surface and a outer surface, a charging device electrically charges the outer surface, and an exposure device imagewise exposes the inner surface. A developing device is used to form a first toner image on the outer surface. A unit is detachablly mounted in a housing of the apparatus, wherein the image forming body and a plurality of the exposure devices are provided in the unit.

Abstract: A diazo copy machine comprises a roll of diazo sensitized copy paper cradled between a pair of drive rollers above an exposure apparatus. The copy machine is activated by insertion of an original tracing sheet whereupon the copy paper and original are automatically fed in superimposed relation into the entrance of the exposure apparatus, with the leading edge of the copy paper being advanced by a programmable amount relative to the leading edge of the original. Upon exiting the exposure apparatus the superimposed sheets are directed to an automatic sheet separating apparatus which deflects and feeds the copy paper along a downward path to a developer and carries the original along an exit path out of the front of the copy machine. In the event that the two superimposed sheets both inadvertently enter the downward path, a fail-safe mode of operation is initiated for redirecting both sheets along the exit path.

Abstract: A printing tank contains a body of transparent liquid within which a main printing sprocket is totally immersed. Mechanism is provided for feeding one edge of a master strip of film onto the sprocket and in a curved path around a portion of the circumference of the sprocket. A curved support is provided to support the other edge of the master strip of film in a parallel relationship. An illuminated window is positioned between the sprocket and the curved support. A space between the window and the master strip of film is filled with the transparent liquid.In operation, the master strip of film is sprocket-registered while passing the printing aperture effected by the illuminated window. Means are also provided for transporting an unexposed strip of film in sprocket registry with the master strip of film at the aperture.PRIOR ARTContinuously driven printing machines for transferring photographic images from one moving strip of film to another are well-known, one being shown, for example, in the Jeapes Pat. No.

Abstract: The present invention replaces the film supporting and stripping arrangement in the most widely-used conventional motion picture film printing machine with a film driving sprocket and a combined supporting and stripping drum which drive and fully support both the superimposed negative film and copy film throughout their entire widths and prevents them from moving apart from one another as they pass through the exposure zone wherein the exposure light passes through the two films but not beyond the combined supporting and stripping drum which obstructs the further passage of the light so that it is either reflected or deflected backward from the drum.

Abstract: In a bidirectional continuous contact printer for sprocketed film, sprocket holes in a raw film and a master film engage teeth in a sprocket wheel located at an exposure aperture. Between one storage reel and the sprocket wheel, the raw film and the master film pass over tensioning means that draw one edge of the sprocket holes of the raw film and the master film that engage the teeth of the sprocket wheel against such teeth to align the sprocket holes of the films. The tensioning means draw the same edge of the sprocket holes against the teeth in the sprocket wheel during both directions of film transport. In one direction of film transport, the sprocket wheel pulls the film past the exposure aperture, and in the other direction of film transport, the tensioning means pull the film past the exposure aperture. In both directions of film transport, the relative film position is controlled well enough to meet high quality film printing standards.