公开(公告)号：US3604034A

公开(公告)日：1971-09-14

申请号：US3604034D

申请日：1969-01-07

申请人： WALTER HERMANN LEISTNER

发明人： LEISTNER WALTER HERMANN

IPC分类号： B21G3/00 ,  B21G3/16 ,  B21G3/32 ,  B21G3/20 ,  B21G3/28

CPC分类号： B21F7/00 ,  B21G3/00 ,  B21G3/005 ,  B21G3/16 ,  B21G3/32

摘要： Apparatus and a method for making nails with flat circular heads and a shank of a noncircular cross-sectional shape and the method comprises: unwinding drawn wire from a roll of wire and advancing the wire by an intermittent drive means; passing the wire through guide means to provide a straight length of wire; engaging a portion of the wire with die means to form a cylindrical portion on the wire having a circular cross-sectional shape and a length substantially sufficient to form the head of the nail; feeding the wire into a nail-making machine wherein the head is formed from the cylindrical portion and shearing the nail off at the end of the shank to form the nail.

公开(公告)号：US3480061A

公开(公告)日：1969-11-25

申请号：US3480061D

申请日：1968-09-30

申请人： WALTER HERMANN LEISTNER

发明人： LEISTNER WALTER HERMANN

IPC分类号： F16B37/04 ,  F16B39/00

CPC分类号： F16B37/048 ,  Y10S411/968