Invention Grant
- Patent Title: Mold for forming a hearing protective device
- Patent Title (中): 用于形成听觉保护装置的模具
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Application No.: US11357768Application Date: 2006-02-17
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Publication No.: US07731487B2Publication Date: 2010-06-08
- Inventor: Richard Knauer , Alan R. Seville , Robert N. Falco , James Hall
- Applicant: Richard Knauer , Alan R. Seville , Robert N. Falco , James Hall , Lori S. Hall, legal representative
- Applicant Address: US MN St. Paul
- Assignee: 3M Innovative Properties Company
- Current Assignee: 3M Innovative Properties Company
- Current Assignee Address: US MN St. Paul
- Agent Karl G. Hanson
- Main IPC: B29C44/12
- IPC: B29C44/12
Abstract:
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.
Public/Granted literature
- US20060141083A1 Hearing protective device and method of making the same Public/Granted day:2006-06-29
Information query
