Metal deforming – With temperature modification of tool or of specified... – Of tool
Reexamination Certificate
2007-04-17
2007-04-17
Tolan, Ed (Department: 3725)
Metal deforming
With temperature modification of tool or of specified...
Of tool
C072S060000, C072S342800, C072S350000, C072S709000
Reexamination Certificate
active
11149974
ABSTRACT:
A press and tooling apparatus for forming a preheated blank includes a heated upper tool and an opposing heated lower tool mounted within the press for relative closing movement to press the preheated blank there between. A binder ring assembly surrounds the lower tool and is mounted on the press for movement relative to the lower tool so at to bind the preheated blank to the upper tool in air tight sealing relationship in readiness for closure of the tools and application of pressurized gas to force the blank into contact with the upper tools. The binder ring assembly includes an upper ring that is heated so as to prevent the cooling of the preheated blank, and a lower ring that supports the upper ring and is fixedly connected to the upper ring by spaced apart connectors so as to minimize the heat transfer path from the heated upper ring to the lower ring. The upper and lower rings have opposed seal surfaces spaced from one another to receive there between a seal of metallic hollow tubular construction which provides fluid tight sealing between the upper and lower rings, and minimizes heat transfer there between.
REFERENCES:
patent: 4288021 (1981-09-01), Leodolter
patent: 5209093 (1993-05-01), Cadwell
patent: 5277045 (1994-01-01), Mahoney et al.
patent: 6211497 (2001-04-01), Matsen et al.
patent: 6880377 (2005-04-01), Kim et al.
patent: 6886383 (2005-05-01), Kim et al.
patent: 6910358 (2005-06-01), Schroth
Hammar Richard H.
Johnson John Norman
Kim Chongmin
Kruger Gary A.
GM Global Technology Operations Inc.
Marra Kathryn A.
Tolan Ed
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