IPC Subgroup
B21H 1/22 characterised by use of rolls having circumferentially varying profile
Introduced: July 1974
Last revised: January 2006
Full Title
Making articles shaped as bodies of revolution > characterised by use of rolls having circumferentially varying profile
Classification Context
- Section:
- PERFORMING OPERATIONS; TRANSPORTING
- Class:
- MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- Subclass:
- MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS