The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 25, 1987
Filed:
Apr. 25, 1986
Elvin L Boyce, Salt Lake City, UT (US);
Professional Tape Converters, Inc., Salt Lake City, UT (US);
Abstract
A filter mask for filtering air inhaled and exhaled from the mouth and nostrils while providing a positive facial lock at all edges of the mask. In a preferred embodiment of the invention both the upper and lower edges of the mask are provided with moldable stiffeners for conforming to the shape of the wearer's nose and cheek area and the lower jaw and chin area, respectively. The lower edge is folded so as to form a reverse pleat which conforms to the shape of the lower jaw. A single headband may be used to hold the mask on the head. The peripheral edges of the mask are bound. The mask provides excellent filtration since the positive facial lock around all edges of the mask substantially prevents air from leaking between the mask and the face.