Method for making a clad wire for an electric contact
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsTsunehiko Todoroki, Sankichi Shida
Life of this patent
Estimating the term…
Abstract
A clad wire for an electric contact is made by sofening a clad tape, which consists of at least a base metal and a surface layer of noble metal, by annealing, forming the softened clad tape into a cross sectional form of a circular arc, and cold-drawing the formed clad tape through a die having a desired cross sectional shape so as to provide a clad wire.
Claims8
A method for making a clad wire for an electric contact comprising the steps of softening a clad tape by annealing, said clad tape comprising a base metal and at least one surface layer of noble metal firmly bonded to said base metal, forming said softened clad tape into a cross sectional shape of a circular arc perpendicular to the longitudinal direction of said clad tape with said noble metal surface layer on the outside peripheral surface thereof, and normally cold-drawing said formed clad tape through a wire forming die having a standard section with the noble metal surface layer on the outer surface of the drawn clad tape, whereby there is provided a clad wire which is partially clad with said noble metal as a surface layer.
Dependencies are inferred from the claim text.