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B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
B21K21/00—Making hollow articles not covered by a single preceding sub-group
B21K21/04—Shaping thin-walled hollow articles, e.g. cartridges
B—PERFORMING OPERATIONS; TRANSPORTING
B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
B21C25/00—Profiling tools for metal extruding
FR1007405D1949-12-231949-12-23Procédé de refoulement, machine pour la mise en oeuvre de ? procédé et produitsobtenus par ce procédé
ExpiredFR1007405A
(fr)
Procédé pour le filage de polymères supérieurs en fusion, produits obtenus par ce procédé, filières pour la mise en oeuvre de ce procédé, et procédé pour la fabrication de ces filières