Electric heating – Heating devices – With heating unit structure
Reexamination Certificate
2005-09-29
2009-12-08
Robinson, Daniel L (Department: 3742)
Electric heating
Heating devices
With heating unit structure
C219S538000
Reexamination Certificate
active
07629560
ABSTRACT:
A heater system is provided that comprises a plurality of layered heater modules, each module comprising a plurality of resistive zones. The layered heater modules are disposed adjacent one another to form the heater system, which can be adapted for a multitude of different sizes of heating targets. Preferably, the resistive zones comprise a plurality of resistive traces arranged in a parallel circuit and oriented approximately perpendicular to a primary heating direction, wherein the resistive traces comprise a positive temperature coefficient material having a relatively high TCR. The resistive traces are responsive to the heating target power gradient such that the resistive traces output additional power proximate a higher heat sink and less power proximate a lower heat sink along the primary heating direction.
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ISR and Written Opinon for PCT/US2005/035262.
Brinks Hofer Gilson & Lione
Robinson Daniel L
Watlow Electic Manufacturing Company
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