Temperature control for laminator
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United States of America Patent
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-
Nov 29, 1994
Grant Date -
N/A
app pub date -
Aug 16, 1993
filing date -
Aug 16, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
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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