Public domain
Adding tread rubber stock. When the fabric carcass has been built to the proper number of layers and cushion rubber has been added under the tread, the thick, extra tough tread rubber is added, having been molded to the proper shape by extrusion in a previous operation. Mechanical guides help this b
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineAdding tread rubber stock. When the fabric carcass has been built to the proper number of layers and cushion rubber has been added under the tread, the thick, extra tough tread rubber is added, having. 1941-01-01. Palmer, Alfred T., United States. Office For Emergency Management. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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