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.)
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
B21K21/08—Shaping hollow articles with different cross-section in longitudinal direction, e.g. nozzles, spark-plugs
B21K21/10—Shaping hollow articles with different cross-section in longitudinal direction, e.g. nozzles, spark-plugs cone-shaped or bell-shaped articles, e.g. insulator caps
Verfahren zum herstellen einer einteiligen hohlwelle aus einem rohrförmigen werkstück aus metall, damit hergestellte hohlwelle und vorrichtung sowie deren verwendung
Verfahren zur Herstellung von dekorativen oder informativen Musterungen an Gegenständen, die aus einfach oder gegebenenfalls mehrfach plattierten Blechen gebildet sind