Abstract: Accelerated thermal upshock rates in the exhaust cycle of a CRT envelope are attained for CRTs, and especially a tension mask CRT having a shadow mask-supporting rail frame affixed to a flat, skirtless front panel. The corner walls of the CRT funnel are made with thinner walls to provide an increased compliance of the normally very rigid corners of the funnel-to-panel seal area. Panel-fracturing stresses generated in the funnel-to-panel seal area corners during upshock are thus alleviated allowing for faster CRT throughput during manufacture.

Abstract: A CRT bulb is constructed from a front panel having a higher coefficient of thermal expansion than the funnel section to which it is rigidly attached, thereby favorably stressing the bulb in the funnel-to-panel seal area resulting in a bulb with adequate evacuated strength while utilizing a thinner front panel than otherwise possible.

Abstract: A CRT funnel, especially useful for CRTs having flat face panels, has concave diagonal walls sections to reduce discontinuity stresses between the face panel and funnel in the evacuated CRT envelope, thereby increasing the CRT pressure strength.

Abstract: An annulus attached adjacent the edge planes of a CRT front panel provides screen area savings, and in the preferred embodiment, panel protection, strengthening, and anti-implosion properties. The annulus is preferably composed of a plurality of sections and incorporates a shadow mask support. The annulus is attached to the front panel before receiving the shadow mask becomes a part of the CRT envelope. In a preferred embodiment, the annulus is composed of ceramic and is x-ray shielded by an application of lead-based frit.

Abstract: Accelerated thermal upshock rates in the exhaust cycle of a CRT envelope are attained for a tension mask CRT having a shadow mask supporting rail frame affixed to the front panel. The actual corners of the rail frame are chamfered or left open to provide an increased separation distance from the corners of the funnel seal land. Panel fracturing stresses generated in the funnel seal area corners during upshock are thus alleviated allowing for faster CRT throughput during manufacture, without increasing the size of the CRT components.

Abstract: An annulus attached adjacent the edge planes of a CRT front panel provides screen area savings, and in the preferred embodiment, panel protection, strengthening, and anti-implosion properties. The annulus is preferably composed of a plurality of sections and incorporates a shadow mask support. The annulus is attached to the front panel before receiving the shadow mask and becomes a part of the CRT envelope. In a preferred embodiment, the annulus is composed of ceramic and is x-ray shielded by an application of lead-based frit.