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B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
B29C53/22—Corrugating
B29C53/30—Corrugating of tubes
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Shaping Of Tube Ends By Bending Or Straightening
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FR1156589D1955-10-101956-07-28Procédés et appareillages pour la conformation de tubes et tubes ainsi conformés
ExpiredFR1156589A
(fr)