Cathode ray tube

Abstract

An implosion protection-enhanced cathode ray tube (CRT) includes an evacuated envelope structured from a display panel section, a neck, and a funnel section. The CRT comes with a reinforcing metal band for implosion protection clamped by thermal shrink-fit methods around the outer periphery of the panel. This implosion-protective band may be a metal strip of generally rectangular closed-loop shape. The strip is machined to have bent walls so that it resembles in shape an open-roof dome as a whole. Preferably, the band has its one edge as folded back or 'curled' defining a 'flip.' Upon attachment to the display panel, the band is placed so that the 'peak' of each bulged wall is offset in position from a mold match line of the panel toward the CRT neck. With such 'band preoffset' feature, the implosion-protective band offers increased locking or clamping forces against the panel thus enhancing the CRT implosion protecting ability.