DIFF Subgroup
B21D 19/06 working inwardly
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Flanging or other edge treatment, e.g. of tubes > by continuously-acting tools moving along the edge > shaped as rollers > working inwardly
CPC:
Flanging or other edge treatment, e.g. of tubes (connecting by making use of folds B21D39/00; flaring-out tube ends B21D41/02) > by continuously-acting tools moving along the edge (edge-curling B21D19/12) > shaped as rollers > working inwardly
No child classifications to compare. This is a leaf node in both IPC and CPC.