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 0.3 mm. Another substantially uniform thickness region is formed in the region ranging from 90.degree.-(d+.alpha.).degree. to the minor axis S by keeping the difference in thickness from the minor axis S within 0.3 mm. 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.

No funil para o uso nos tubos de raio de cátodo, a espessura da região que varia da linha central principal L à linha central diagonal D é feita substancialmente uniforme mantendo a diferença na espessura entre as regiões na linha central principal L e na linha central diagonal D dentro de 0.3 milímetro. Uma outra região substancialmente uniforme da espessura é dada forma na região que varia de 90.degree.-(d+.alpha.).degree. à linha central menor S mantendo a diferença na espessura da linha central menor S dentro de 0.3 milímetro. A espessura da região na linha central principal L é a mesma que convencional. Então o peso do funil pode ser reduzido sem sacrificar sua força mecânica.

 
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