Metal working – Method of mechanical manufacture – Electrical device making
Reissue Patent
2008-10-24
2010-11-23
Tugbang, A. Dexter (Department: 3729)
Metal working
Method of mechanical manufacture
Electrical device making
C029S03300H, C029S527600, C029S527700, C029S874000, C072S700000, C445S007000
Reissue Patent
active
RE041944
ABSTRACT:
In a wire drawing process for forming a wire rod containing iridium as a main component and which further contains nickel and at least one of platinum, rhodium and ruthenium, and having a cross-sectional area of not smaller than 0.05 mm2and not larger than 1.2 mm2. The worked material is continuously heated red hot and/or white hot in a heating region103extending up to 60 mm from the work inserting surface101a of a die101in a direction opposite that in which the work102moves, the work being heated to a temperature of 1000 to 1150° C. at a temperature measuring position105which is removed from the work inserting surface101a by 20 mm. Furthermore, the temperature in the region106extending from the temperature measuring position105to the work inserting surface101a is set to not lower than 1000° C., and the wire drawing rate is set to 300 to 1600 mm/min.
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Search Report for GB0408438.0 dated Aug. 4, 2004.
Matsubara Yoshihiro
Matsutani Wataru
Yoshimoto Osamu
Cazan Livius R
NGK Spark Plug Co. Ltd.
Sughrue & Mion, PLLC
Tugbang A. Dexter
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