Method for manufacturing nails
AssigneeWakai & Co., Ltd.
InventorTakao Wakai
Life of this patent
Estimating the term…
Abstract
A method for manufacturing a nail efficiently at low cost without a loss of material. The nail includes two legs bound together by a washer. One of the legs has a protrusion such that when the other leg is driven, it will spread by riding on the protrusion. In this method, a round rod stock is pressed except a portion thereof to form a head at one thereof, a trunk portion having a semicircular section with a flat surface between the head and the portion, and a tip portion at the other end of the rod stock. The portion forms the protrusion. The one of the legs is thus formed. The protrusion may be formed by pressing the rod from both sides.
Claims23
A method of manufacturing a nail comprising two legs bound together by a washer, one of said two legs having a protrusion such that when the other of said two legs is driven, said other of said two legs will spread by riding on said protrusion, said method comprising:
- pressing a round rod stock except a portion thereof, to form a head at one end of said round rock stock, a trunk portion having a semicircular section with a flat surface, and a tip portion at the other end of said round rod stock;
- and
- forming said portion into said protrusion, thereby forming said one of said two legs.
A method of manufacturing a nail comprising two legs bound together by a washer, one of said two legs having a protrusion such that when the other of said two legs is driven, said other of said two legs will spread by riding on said protrusion, said method comprising:
- pressing a nail stock having a round shank with a tip at one end thereof and a head at the other end thereof, except a portion of said nail stock near said tip, to form a trunk portion having a semicircular section, said head into a head portion, and said tip into a tip portion;
- and
- forming said portion near said tip into said protrusion, thereby forming said one of said two legs.
A method of manufacturing a nail comprising two legs bound together by a washer, one of said two legs having a protrusion such that when the other of said two legs is driven, said other of said two legs will spread by riding on said protrusion, said method comprising pressing a semicircular rod stock, except a portion thereof, to form a head at one end of said semicircular rod stock, a tip portion at the other end of said semicircular rod stock, and said protrusion between said portion and said tip portion.
Dependencies are inferred from the claim text.