Title:
【発明の名称】引留ねじの製造方法
Document Type and Number:
Japanese Patent JP2002511341
Kind Code:
A
Abstract:
A method of making a knob and ferrule for a captive screw is disclosed, the knob integrally attached to the screw, the ferrule attachable to a panel. The method of making the knob includes providing an aluminum alloy base metal for the knob, pressing by cold-forming the base material into a generally cylindrical cup-shaped article using at least one pressing operation, the cup having a generally cylindrical side wall, removing any base material situated outside the perimeter of the cup-shaped cylindrical article, and providing a hole in the bottom of the cup, coaxial with the hollow cylindrical walls of the cup, thereby forming the knob. The method of making the ferrule includes providing a metal base material for the ferrule, pressing the base material, by cold-forming, into a cylindrical article using at least one pressing operation, the cylindrical article having a cylindrical side wall having an outer surface, cold-forming an attachment device an end of the ferrule; and removing any base material situated outside the perimeter of the cylindrical article, thereby forming the ferrule. All major parts of the captive screw, including the knob, ferrule and screw may be cold formed.
Inventors:
Ellis, Thomas Jay.
McCormack, Edward A.
Dickerson, Harry El.
McCormack, Edward A.
Dickerson, Harry El.
Application Number:
JP2000543267A
Publication Date:
April 16, 2002
Filing Date:
April 08, 1999
Export Citation:
Assignee:
Southco, Incorporated
International Classes:
B23P19/08; B21D22/00; B21D22/20; B21D28/00; B21D53/00; B21G5/00; B21J5/00; B21K1/00; B21K21/02; B23G9/00; F16B41/00; F16B5/02; (IPC1-7): B21D53/00; B21D22/00; B21D28/00; B21G5/00; B23G9/00; B23P19/08
Attorney, Agent or Firm:
Takashi Ishida (3 others)