Metal deforming – With temperature modification of tool or of specified... – Of tool
Reexamination Certificate
2007-01-09
2007-01-09
Tolan, Ed (Department: 3725)
Metal deforming
With temperature modification of tool or of specified...
Of tool
C072S342920, C072S364000, C072S709000, C076S107100
Reexamination Certificate
active
10960484
ABSTRACT:
A hot forming tool is heated with multiple electrical resistance cartridge heaters. The heaters are located in the body of the tool so as to maintain the entire forming surface within a predetermined temperature range. Numerical thermal and optimization analyses direct the placement of the heaters so that when each heating element is simultaneously powered on for an identical fraction of the time, an acceptable temperature distribution will be produced within the tool at the tool operating temperature.
REFERENCES:
patent: 3528276 (1970-09-01), Hedstrom et al.
patent: 3926029 (1975-12-01), Abson et al.
patent: 4888973 (1989-12-01), Comley
patent: 5277045 (1994-01-01), Mahoney et al.
patent: 6272894 (2001-08-01), Hudson et al.
patent: 6810709 (2004-11-01), Hammar et al.
patent: 6884966 (2005-04-01), Coleman et al.
European Search Report dated Mar. 30, 2006 for corresponding EP 05 02 0585 application.
Hammar Richard H.
Schroth James G.
General Motors Corporation
Marra Kathryn A.
Tolan Ed
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