US Patent 1,450,131, granted 27 March 1923 to Benno Borzykowski of Paris, for an apparatus that spins artificial (viscose) threads. Several fine nozzles are submerged in a setting bath and their filaments are united into one bundle, which is drawn off by a driven cylinder and stretched onto a take-up spool. The patent claims finer threads (5 deniers and below) and replaces a separate doubling frame. It includes five drawing figures, a specification and four claims.