Armstrong, Nikaido, Marmelstein & Kubovcik
Press apparatus
 A press of improved moldability and operation efficiency, including an upper movable die having a concave bottom surface, a lower, stationary arc having a convex top surface conforming to the concave bottom surface of the upper die, a blank holder arranged around the lower die for vertical sliding movement, and a blank support lever arm pivotally mounted on top of the blank holder. The blank holder is normally held raised by cushion means in such a position that its top surface is lower than the crest of the convex top surface of the lower die. The blank support lever arm is normally biased to a horizontal position to support a blank in a horizontal position in co-operation with the crest of the lower die and is tilted down by the upper die in downstroke movement out of its path, allowing the blank to be pressed down. 
Honda Giken Kogyo Kabushiki Kaisha
B B Y B
B21D B21D Y10S B21D
inventional inventional additional inventional
Tatsushi Masao Motoatsu
Matsuda Sano Shiraishi