DIFF Subgroup
B21D 1/05 Stretching combined with rolling
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling > Stretching combined with rolling
CPC:
Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom (B21D3/00 takes precedence); Stretching sheet metal combined with rolling (working sheet metal of limited length by stretching B21D25/00; by localised hammering B21D31/06) > Stretching combined with rolling
No child classifications to compare. This is a leaf node in both IPC and CPC.