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Department Archives Remove constraint Department: Archives Creator Hercules Incorporated Remove constraint Creator: Hercules Incorporated Creator Rittase, William M., 1894-1968 Remove constraint Creator: Rittase, William M., 1894-1968 Rights No Known Copyright Remove constraint Rights: No Known Copyright Subject Hercules Incorporated Remove constraint Subject: Hercules Incorporated Subject Machinery Remove constraint Subject: Machinery Subject Extrusion process Remove constraint Subject: Extrusion process