Method and apparatus of assuring interchangeability of shadow masks and front panels in the manufacture of color cathode ray tubes

Abstract From the Canadian patent

Process and apparatus are disclosed for use in the manufacture of a color cathode ray tube having a shadow mask with a central pattern of apertures mounted in tension on a transparent flat front panel. The mask aperture pattern is registered with a catholdoluminescent screen pattern of corresponding geometry and position on an inner surface of the panel. The shadow masks and front panels are respectively interchangeable. In one embodiment inter-, registry of a screen pattern with a tension mask aperture pattern is achieved by stretching or otherwise expanding the mask to a predetermined standard. In other embodiments signals are developed which are indicative of the positions of a …