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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
B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
B21D22/14—Spinning
B21D22/18—Spinning using tools guided to produce the required profile
B21D22/185—Spinning using tools guided to produce the required profile making domed objects
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FR597734D1925-01-291925-05-07
Improvements in the manufacture of containers or parts of containers made of sheet aluminum or similar material
ExpiredFR597734A
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