Gas blowing plug and manufacturing method therefor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Apr 22, 2003
Grant Date -
N/A
app pub date -
Aug 18, 2000
filing date -
Aug 19, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
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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