Close-up view of a continuous shaft drawtwister used during the early stages of nylon production and research at DuPont. As part of the cold-drawing process, drawtwisters were used to stretch the nylon filaments following extrusion. In this version, a supply of undrawn yarn was loaded into a feed roll, around a draw pin, through a continuous shaft, and through a rubber draw roll before finally being wound onto a bobbin.
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“Continuous Shaft Drawtwister for Nylon,” June 1946. Joseph X. Labovsky Collection of Nylon Photographs and Ephemera, Box 2. Science History Institute. Philadelphia. https://digital.sciencehistory.org/works/gx41mh91j.
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