Apparatus and method for drying lumber

Details Apparatus and method for drying lumber Apparatus and method for drying lumber

1983-03-07

1984-08-21

Schwartz, Larry I.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34 68, 34 92, 34 73, F26B 334

Patent

active

044661983

ABSTRACT:
The stack of lumber is first enclosed in a flexible covering of pervious sheet material and then enclosed in a flexible covering of impervious sheet material and electrode plates are positioned above and below the stack of lumber. A subatmospheric pressure is applied on the stack of lumber and the electrodes are charged by high-frequency electric current to dielectrically heat the lumber and volatized water vapors are extracted from the stack of lumber and condensed and withdrawn to reduce the moisture content of the stack of lumber to the desired degree, 15 percent or less by weight. Accurate drying of the lumber is provided and the drying operation requires a relatively short period of time.

REFERENCES:
patent: 2617202 (1952-11-01), Reedy
patent: 3986268 (1976-10-01), Koppelman
patent: 4176464 (1979-12-01), Randolph
patent: 4194296 (1980-03-01), Pagnozzi et al.
patent: 4258240 (1981-03-01), Pless

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