Hybrid implosion protection system for a flangeless faceplate color cathode ray tube and method of assembly thereof

Abstract From the Canadian patent

This disclosure depicts a color television picture tube having a glass bulb which includes an approximately rectangular, flangeless, three-dimensionally curved faceplate having a convex front surface, a concave rear surface and an edge surface. The bulb has a funnel with a convex seal land which mates with the concave inner surface of the faceplate. The tube has a hybrid implosion protection system comprising a high tensile strength frame which surrounds and closely hugs at least the edge surface of the faceplate to define a cavity between the frame and the edge surface. The cavity contains a hardened cement, the frame and cement binding up the edge surface of the faceplate to provide a …