Drying and gas or vapor contact with solids – Apparatus – Houses – kilns – and containers
Reexamination Certificate
2007-10-12
2011-11-01
Lu, Jiping (Department: 3743)
Drying and gas or vapor contact with solids
Apparatus
Houses, kilns, and containers
C034S215000, C034S242000, C034S543000, C034S546000, C034S549000
Reexamination Certificate
active
08046932
ABSTRACT:
A method and apparatus for operating a dryer used to reduce the moisture content of sheet material. A drying chamber is provided and includes a plurality of drying sections and a single point exhaust system. A seal section located at the input end of the dryer includes an exhaust passage through which a gas sample is drawn by a sampling fan. Gases within the seal section are a combination of ambient air drawn through restricted passages at the entry to the seal section and exhaust gas that bleeds into the seal section from the drying chamber. A controller monitors the temperature of the sampled gases and ambient air and adjusts the rate of exhaust flow from the main exhaust system as a function of the temperature differential. A heating system is also provided for heating the seal exhaust gases above the pitch condensation temperature for the flow.
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patent: 2004/0079354 (2004-04-01), Takeda
Lu Jiping
Schwabe Williamson & Wyatt
USNR/Kockums Cancar Company
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