Closed loop oven control system and method
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United States of America Patent
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N/A
Issued Date -
Dec 30, 2004
app pub date -
May 21, 2004
filing date -
May 21, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A closed loop control of a heater bank used to preheat sheet plastic in preparation for thermoforming said sheet. The heater bank has zones of the heater bank in which the heaters are variably energized to produce greater heating in some areas of the sheet. A global percent increase in energization of all of the heaters is produced in correspondence to the sensed temperature of a location on the sheet to better control and speed the preheating process.
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