ALEXANDRIA, Va., Sept. 17 -- United States Patent no. 12,415,304, issued on Sept. 16, was assigned to Daniel R. Joseph (Arlington, Texas).
"Air ring for blown-film extrusion apparatus" was invented by Daniel R. Joseph (Arlington, Texas), Joshua S. Powell (Arlington, Texas) and Adrian M. Hawk (Fort Worth, Texas).
According to the abstract* released by the U.S. Patent & Trademark Office: "An air ring has a main body including a plenum through which pressurized air enters the air ring, the main body including a generally circular interior that is unobstructed vertically above the main body. A generally circular forming-cone assembly is received in the generally circular interior of the main body, and includes at least one annular lip definin...