Light blocking lens for welder helmet

Details Light blocking lens for welder helmet Light blocking lens for welder helmet

1980-11-12

1983-02-15

Nerbun, Peter P.

Apparel

Guard or protector

For wearer's head

A61F 906

Patent

active

043732127

ABSTRACT:
In the sight opening of the face shield of a welding helmet, a protective lens overlying a filter lens and having a light impervious coating about its edge portion blocking the passage of light rays through its edge portion and through the clearance about the lenses within the sight opening and thus eliminating the use of a gasket or other sealant about the lens first mentioned or within or about the sight opening.

REFERENCES:
patent: 1180341 (1916-04-01), Thomas
patent: 2002719 (1935-05-01), Singer
patent: 2152383 (1939-03-01), Leader
patent: 2748020 (1956-05-01), Parsons et al.
patent: 3257667 (1966-06-01), Anderson
patent: 3603670 (1971-09-01), Kim
patent: 4123591 (1978-10-01), Karki
patent: 4185328 (1980-01-01), Graveno

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