发明名称 |
Mold for forming a hearing protective device |
摘要 |
A mold for forming a foam earplug including a lower mold portion including a lower cavity; and an upper mold portion including an upper cavity and a means for venting a gas during a rising of the foam, wherein the lower and upper mold portions are engageable so as to communicably engage the lower and upper cavities.
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申请公布号 |
US7731487(B2) |
申请公布日期 |
2010.06.08 |
申请号 |
US20060357768 |
申请日期 |
2006.02.17 |
申请人 |
3M INNOVATIVE PROPERTIES COMPANY |
发明人 |
KNAUER RICHARD;SEVILLE ALAN R.;FALCO ROBERT N.;HALL JAMES |
分类号 |
A61F11/08;B29C44/12;A61F11/10;A61F11/12 |
主分类号 |
A61F11/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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