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    • 5. 发明授权
    • CRT funnel with positioning reference portions
    • CRT漏斗与定位参考部分
    • US07093732B1
    • 2006-08-22
    • US09787953
    • 2000-06-02
    • Hajime MakioMasaya KyonoShigeyoshi Ito
    • Hajime MakioMasaya KyonoShigeyoshi Ito
    • H01J29/86
    • H01J29/86H01J2209/466
    • Upper end edges (7a, 7b, 7c) of positioning reference portions (5a, 5b, 5c) to be formed on outer walls of a funnel (1) for cathode ray tube are formed at distances (downwardly) toward a narrow open end (3) of the funnel from a maximum profile line (4) formed in the vicinity of a wide open end (2) by mold matching of forming mold at the time of press molding, thereby suppressing molding defects such as deficiency and wrinkle resulting from that glass is not completely filled, which are likely to occur in reference surfaces (6a, 6b, 6c) of the positioning reference portions, and eliminating occurrences of small cracks caused by concentration of heat stress, which are likely to occur in the upper end edges (7a, 7b, 7c) of the reference portions, to improve the productivity of the funnel.
    • 形成在用于阴极射线管的漏斗(1)的外壁上的定位基准部分(5a,5b,5c)的上端边缘(7a,7b,5c)形成在距离(向下) 通过模压成型时的成型模具的匹配,从形成在宽开口端(2)附近的最大型材线(4)朝向漏斗的窄开口端(3),从而抑制成型缺陷 不能完全填充由该玻璃导致的缺陷和皱纹,这些位置可能发生在定位基准部分的参考表面(6a,6b,6c)中,并且消除了由热应力集中引起的小裂纹的发生, 可能发生在参考部分的上端边缘(7a,7b,7b)中,以提高漏斗的生产率。