Metal deforming – By use of closed-die and coacting work-forcer – Cup or shell drawing
Reexamination Certificate
2011-01-04
2011-01-04
Bonk, Teresa M (Department: 3725)
Metal deforming
By use of closed-die and coacting work-forcer
Cup or shell drawing
C072S351000
Reexamination Certificate
active
07861568
ABSTRACT:
A die set for press-forming a blank of thin metallic sheet. The die set has a punch and a blank holder. The blank holder has a first bead for restraining an edge of the blank with a constant force. The first bead is disposed further to an inside than a second bead for restraining the edge of the blank with a force that varies during pressing of the blank.
REFERENCES:
patent: 4195510 (1980-04-01), Juergens
patent: 5901599 (1999-05-01), Sato et al.
patent: 09-029349 (1997-02-01), None
Ishihara Yoshimitsu
Kitano Yasuhiko
Maeda Shingo
Nakamura Tsuyoshi
Bonk Teresa M
Honda Motor Co. Ltd.
Rankin , Hill & Clark LLP
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