Funnel for cathode ray tube

摘要

In the funnel for use in cathode ray tubes, the thickness of the region ranging from the major axis L to the diagonal axis D is made substantially uniform by keeping the difference in thickness between the regions on the major axis L and the diagonal axis D within 0.3mm. Another substantially uniform thickness region is formed in the region ranging from 90 DEG -(d + alpha ) DEG to the minor axis S by keeping the difference in thickness from the minor axis S within 0.3mm. The thickness of the region on the major axis L is the same as the conventional one. Then the weight of the funnel can be reduced without sacrificing its mechanical strength. <IMAGE> <IMAGE>