REINFORCEMENT OF CATHODE RAY TUBES

摘要

A cathode ray tube has an explosion-proof band (3) shrink fitted on the periphery of a panel (2) thereof. The band (3) has recesses (10) formed therein so as to adjust the effective sectional area of the band to a value appropriate for correcting strain of the panel (2) caused by evacuation of a tube body (1) of the cathode ray tube. The size of the recesses (10) is determined on the basis of a misalignment correction estimated theoretically by using measured data of deformation of the panel, so that the deformation of the panel surface is corrected apropriately, and thereby misalignment of electron beams is minimised.