1) William J Archer, Wire Hood Forming Machine, 1947, US2416672A (classificazione B21F45/04)
2) Luca e Eugenio Mestrinaro, device for forming the girdle in metal cages for tops of bottles for sparkling drinks, 2008, EP19646623A1 (classificazione B21F45/04)
Classificazione B21F45/04:
B = performing operations; transporting
B21 = mechanical metal - working without essentially removing material; punching metal
B21F = working or processing of metal wire
B21F45/04 = wire-working in the manufacture of other particular articles of elements
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