Heat-treating methods and systems

Details Heat-treating methods and systems Heat-treating methods and systems

2005-11-08

2005-11-08

Fuqua, Shawntina (Department: 3742)

Electric resistance heating devices

Heating devices

Radiant heater

C392S418000, C392S423000, C219S390000, C219S388000, C219S121600, C219S121850, C219S405000, C219S411000, C118S724000, C118S725000, C438S005000, C438S486000, C438S149000, C438S308000, C438S928000, C438S295000

Reexamination Certificate

active

06963692

ABSTRACT:
A method involves increasing a temperature of a workpiece over a first time period to an intermediate temperature, and heating a surface of the workpiece to a desired temperature greater than the intermediate temperature, the heating commencing within less time following the first time period than the first time period. Another method involves pre-heating the workpiece from an initial temperature to an intermediate temperature, and heating a surface of the workpiece to a desired temperature greater than the intermediate temperature by an amount less than or equal to about one-fifth of a difference between the intermediate and initial temperatures. Another method involves irradiating a first side of the workpiece to pre-heat the workpiece to an intermediate temperature, and irradiating a second side of the workpiece to heat the second side to a desired temperature greater than the intermediate temperature.

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