Button fastener, method for forming button fastener, eyelet, and method for forming eyelet

A method for forming a button fastener made of metal for fastening a button to a cloth, the button fastener comprising a plate-like base and a cylindrical post projecting from a center area of the base, a distal end face of the post being open as a top opening, a proximal end face of the post being open in the center area of the base as a bottom opening, and the button fastener including a disk-like closing member which closes the inside of the post at a proximal side thereof, the method comprising the steps of:

• providing a semifinished product which comprises a plate-like base and an unfinished post projecting from a center area of the base, the unfinished post including a closing part which closes a distal end face of the unfinished post, and a proximal end face of the unfinished post being open in the center area of the base as a bottom opening;
• cutting out the closing part of the unfinished post of the semifinished product by a punch;
• and
• displacing the cut-out closing part with the punch through the inside of the unfinished post toward a proximal end to be used as the closing member.

A method for forming an eyelet made of metal to be fastened to a cloth, the eyelet comprising a plate-like base and a cylinder projecting from a center area of the base, a distal end face of the cylinder being open as a top opening, a proximal end face of the cylinder being open in the center area of the base as a bottom opening, and the eyelet including a closing member which closes the inside of the cylinder at a proximal side thereof, the method comprising the steps of:

• providing a semifinished product which comprises a plate-like base and an unfinished cylinder projecting from a center area of the base, the unfinished cylinder including a closing part which closes a distal end face of the unfinished cylinder, and a proximal end face of the unfinished cylinder being open in the center area of the base as a bottom opening;
• cutting out the closing part of the unfinished cylinder of the semifinished product by a punch;
• and
• displacing the cut-out closing part with the punch through the inside of the unfinished cylinder toward a proximal end to be used as the closing member.