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B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21D15/00—Corrugating tubes
B21D15/04—Corrugating tubes transversely, e.g. helically
B21D15/06—Corrugating tubes transversely, e.g. helically annularly
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FR67653D1955-03-041955-03-04Machine à fabriquer les tubes plissés, utilisable notamment pour la fabrication des soufflets métalliques
ExpiredFR67653E
(fr)