Pittsburgh Forgings Co. v. American Foundry Equipment Co.

THOMPSON, Circuit Judge.

This is an appeal from a decree of the District Court for the Western District of Pennsylvania holding the claims in suit of the Peik patent for a blasting machine valid and infringed. The appellant, Pangborn Corporation, is held to have infringed by making, using and selling the machines, and the -appellant, Pittsburgh Forgings Company, by using the machines. The patent in suit is for a blasting machine which is used for cleaning castings, sheet and other metal articles. The Peik invention is alleged to reside in the fact that directional control was given to a…