Electric heating – Heating devices – Combined with container – enclosure – or support for material...
Patent
1993-08-16
1994-11-29
Reynolds, Bruce A.
Electric heating
Heating devices
Combined with container, enclosure, or support for material...
219505, 219497, 219506, 156322, 1563809, F27B 906
Patent
active
053692462
ABSTRACT:
A laminator temperature control includes a control circuit having a sensing amplifier that drives a triac to control power to PTC heating elements. A temperature sensor at an input of the sensing amplifier causes power to be inhibited to the heating elements when a predetermined adjustable temperature is reached by heating plates positioned between two pairs of rollers. When the heating plate temperature is below the predetermined temperature, proportioned control of the power supply duty cycle is provided. Indicators display the power supply status and temperature ready status of the laminator.
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General Binding Corporation
Jeffery John A.
Reynolds Bruce A.
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