Glass funnel for a cathode ray tube and a cathode ray tube

摘要

A glass funnel for a cathode ray tube capable of increasing the rigidity of a body portion having a rectangular-shaped open end portion and reducing the weight of the glass funnel wherein on at least a long side of the body portion, arched face portions are formed so as to be substantially perpendicular to an open end face of the body portion and an arch-like ridge portion in each of the arched face portions is extended to portions in the vicinity of the open end portion, whereby stresses generated in the body portion can be transmitted to the corner portions of high rigidity of the open end portion along the ridge portions.