Sellers and Brace
Back flash preventer for a powder spray torch
 Disclosed is an improved back flash preventing device for a powder spray torch wherein the improvement comprises a structure constructed to thwart attempts by the user to block the outlet end or atmosphere vent of the back flash preventer. This is accomplished by providing the outlet of the vent with a guard so constructed as to prevent the user closing the outlet with his finger, a covering tape or the like. 
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inventional inventional inventional
James Y.
Anderson