DIFF Subgroup
B21D 19/12 Edge-curling
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Flanging or other edge treatment, e.g. of tubes > Edge-curling
CPC:
Flanging or other edge treatment, e.g. of tubes (connecting by making use of folds B21D39/00; flaring-out tube ends B21D41/02) > Edge-curling
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
1 shared codes have differing titles between IPC and CPC.
Child Classifications
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