Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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ERSOM
Original Assignee
ERSOM
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Publication date
Application filed by ERSOMfiledCriticalERSOM
Priority to FR7223261ApriorityCriticalpatent/FR2189138B1/fr
Publication of FR2189138A1publicationCriticalpatent/FR2189138A1/fr
Application grantedgrantedCritical
Publication of FR2189138B1publicationCriticalpatent/FR2189138B1/fr
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
B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
B21D11/06—Bending into helical or spiral form; Forming a succession of return bends, e.g. serpentine form
B21D11/07—Making serpentine-shaped articles by bending essentially in one plane
