Apparatus and method of drying and dehumidifying plastic
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United States of America Patent
Stats
-
Dec 4, 1990
Grant Date -
N/A
app pub date -
Oct 30, 1989
filing date -
Oct 30, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus and process for heating and dehumidifying plastic materials in a container, such as a hopper, using a current of warm dry air. The apparatus having a desiccant for removing the moisture picked up from the material, and having a heater and cooler downstream from the desiccant. The dryer control operates in three modes to control the cooler only, to control the heater and cooler, and to control the heater only. Measured temperatures and operating conditions control the selection of specific modes.
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