Shield attached by sealing to panel sidewall of cathode ray tube

Claim 1

An improvement in a color cathode ray tube having a patterned cathodoluminescent screen disposed on the viewing panel thereof in a manner to receive electrons beamed through a related multiapertured mask member having perimetrical framing means supported within the panel by means relative to the panel sidewall in spatial relationship to said screen, and whereof the seating edge of the panel is bonded by a sealing substance to the mating edge of the funnel member of the tube envelope to provide a hermetically formed perimetric seal therearound, said improvement being a ruggedizing feature comprising: electron dispersion shielding means formed of a material lighter than that of said mask framing means and having a seating portion attached to said mask framing means and an expansive spanning portion having at least on hill and valley extending peripherally around said mask member in a substantially continuous manner to bridge the peripheral spacing between said member and said panel sidewall; and configurated projecting means of a material substantially matching the coefficient of thermal expansion of said sealing substance formed integral to said expansive spanning portion extending from the leading edge thereof as discrete spaced apart fin-like tab portions having edge-oriented indentations formed to effect only partial transversal embedment in selected regions of said perimetrical seal.