William John Robinson
Electrician in Salt Lake City, UT
License number
Utah 315051-5505
Issued Date
Dec 6, 1995
Expiration Date
Jul 31, 1996
Category
Electrician
Type
Apprentice Electrician
Address
Address
Salt Lake City, UT
Professional information
Filter Mask
US Patent:
3985132, Oct 12, 1976
Filed:
Dec 13, 1974
Appl. No.:
5/532340
Inventors:
Elvin L. Boyce - Salt Lake City UT
William Keith Robinson - Salt Lake City UT
William Keith Robinson - Salt Lake City UT
Assignee:
Tape-Licator, Inc. - Riverton UT
International Classification:
A62B 2302
US Classification:
1281462
Abstract:
An improved filter mask having a laterally pleated filter medium and a stiffening member parallel to and in the vicinity of the pleats. Lateral opening of the pleats causes the stiffening members to bow outwardly and support the filter medium away from the nose and mouth of the wearer thereby providing greater filtering efficiency and wearer comfort.