View of a worker holding a piece of rubber tubing as it is extruded from the tuber machine in the Naval Air Experimental Station's Rubber Compounding and Processing Laboratory. This tuber, a variable speed H.P. Royle equipped with a side-delivery head, was used to extrude rubber or rubber-like materials in the form of a rod or tubing up to a half-inch in diameter. The machine could also be used to apply insulation to wire. This photograph was included in a 1949 Naval Air Experimental Station report on compounding rubber.
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Naval Air Experimental Station, and United States. Navy. “Extrusion of a Half-Inch Diameter Hose on Tuber,” circa 1949. Photographs from the Papers of J. Hartley Bowen, Box 1. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/m900nt438.
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