Abstract: Vertical photoresist developer for processing of any size of printed circuit boards carried on a processing cassette. The processing cassette is carried by a chain through a main chamber, a rinse chamber and a drying chamber, all the processing chambers in line with each other. The processing system is electromechanical and electrically controlled, as well as air and liquid flow control. The developer is system oriented and symmetrical in operation to either side of the board. A printed circuit board holder with gripper fingers mounted in removable plastic chain cassette carries the board through separable processing chambers.

Abstract: Vertical photoresist developer for processing of any size of printed circuit boards carried on a processing cassette. The processing cassette is carried by a chain through a main chamber, a rinse chamber and a drying chamber, all the processing chambers in line with each other. The processing system is electromechanical and electrically controlled, as well as air and liquid flow control. The developer is system oriented and symmetrical in operation to either side of the board.

Abstract: A method of and apparatus for producing a second photographic negative film segment having low grain from an original high grain negative in which an enlarger projects an image of the original negative onto five grain film located at an image plane on a light box. After development of the last-named film it is located at the same image plane, illuminated by the light source in the light box, and a third film segment is exposed at the same plane initially carrying the original high grain negative.