Invention Grant
- Patent Title: Method of making an earplug
- Patent Title (中): 制作耳塞的方法
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Application No.: US13547189Application Date: 2012-07-12
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Publication No.: US08968613B2Publication Date: 2015-03-03
- Inventor: James P. Endle , Jeffrey L. Hamer , Alan R. Seville , Kenneth F. Teeters
- Applicant: James P. Endle , Jeffrey L. Hamer , Alan R. Seville , Kenneth F. Teeters
- 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 Craig A. Deutsch
- Main IPC: B29C44/06
- IPC: B29C44/06
Abstract:
A method of making personal protective equipment, such as a push-in earplug, is disclosed. The method includes the steps of covering a substrate with an outer layer that includes an unactivated foaming agent, positioning at least a portion of the outer layer in a mold, and activating the foaming agent such that a portion of the outer layer expands.
Public/Granted literature
- US20140015157A1 METHOD OF MAKING AN EARPLUG Public/Granted day:2014-01-16
Information query
