Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Hideyuki Ogawa0
Nagamitsu Takashima0
Koichi Saito0
Katsunori Ono0
Date of Patent
June 16, 2009
0Patent Application Number
112250520
Date Filed
September 14, 2005
0Patent Primary Examiner
Patent abstract
The invention is directed to a method of working a small recess portion. In the method, prior to press-forming small recess portions arrayed in a row by pressing a predetermined number of pieces of aligned male dies to a metal base plate, the metal base plate is previously formed with a highly rigid portion at a predetermined portion at a vicinity of an imaginary line extending in a row direction along end portions of predicted press portions to which the respective male dies are pressed.
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