发明授权
- 专利标题： Gas blowing plug and manufacturing method therefor
- 专利标题（中）： 气吹塞及其制造方法
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申请号： US09641314申请日： 2000-08-18
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公开(公告)号： US06551550B1公开(公告)日： 2003-04-22
- 发明人: Keizo Aramaki , Tsuyoshi Yoshida
- 申请人： Keizo Aramaki , Tsuyoshi Yoshida
- 优先权： JP11-232425 19990819
- 主分类号： C21C548
- IPC分类号： C21C548
摘要：
A gas blowing plug and a manufacturing method therefor wherein the gas blowing plug includes a slit-shaped gas passage (22) ranging from the bottom to the top of the plug. The gas passage (22) is continuous or discontinuous in a horizontal cross section of the plug. The slit-shaped gas passage (22) is also continuous from the bottom to the top of the plug and slit-shaped gas passage (26) is discontinuous in a vertical cross section of the plug. In one example, the cross-sectional shape of the slit-shaped gas passage (22) is a pointed star.
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