04951664 is referenced by 32 patents and cites 16 patents.

A mask for filtering dust and other particulates from air to be breathed by a person and a process for making same. The mask includes a compressible strip covered partially by a sealing material around the entire contact path between the mask and the person's face. The compressible strip provides for changes in the configuration of the face, while the impermeable material maintains a seal during all such changes. Another embodiment includes a support for said compressible strip either in the form of a semi-rigid frame member behind said strip or a plurality of inwardly cantilevered bendable finger members.

Title
Mask and method of manufacture
Application Number
7/242720
Publication Number
4951664
Application Date
September 9, 1988
Publication Date
August 28, 1990
Inventor
Trenton A Niemeyer
St. Paul
MN, US
Agent
James V Harmon
Assignee
Filcon Corporation
MN, US
IPC
A62B 18/08
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