Description
Class B21G : MAKING NEEDLES, PINS, OR NAILS
Subclass 3/22: Making pins, nails, or the like (of pins with individual caps B21G 5/00; of U-like shape B21G 7/00; of split-pins B21G 7/08) by operations not restricted to one of the groups B21G 3/12-B21G 3/16 (B21G 3/06-B21G 3/1 take precedence) from wire of indefinite length (by rolling B21G 3/3) in pairs arranged head to head