Mold and mold vent
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United States of America Patent
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Aug 7, 1990
Grant Date -
N/A
app pub date -
Jul 20, 1988
filing date -
Jul 20, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Vents for molds can be improved if, in place of a single relatively large vent opening, there is used a vent which has a plurality of relatively smaller vent openings in which the cumulative cross-sectional area of the relatively smaller vent openings are approximately the same as that of the relatively larger vent opening it replaces. It was also found that the vents have a more efficient self-cleaning capability if the ratio of the depth of each vent opening to the cross-sectional diameter of the vent opening is about 1 or less.
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