METHOD AND APPARATUS FOR FABRICATING A CATHODE RAY TUBE ENVELOPE HAVING AN ANNULAR SHAPED REAR WINDOW

摘要

A method and apparatus for fabricating a rear-window cathode ray tube envelope having a longitudinal axis therethrough. The envelope is formed by hermetically sealing a bulb portion and a tubular neck section to a substantially annular shaped optical access window oriented in substantially symmetrical relationship to the longitudinal axis of the tube to provide a substantially annular viewing area for observing the electron impinged side of the screen.