Coating apparatus – With indicating – testing – inspecting – or measuring means – With means for visual observation
Patent
1990-01-12
1991-12-17
Hoag, Willard
Coating apparatus
With indicating, testing, inspecting, or measuring means
With means for visual observation
118 50, 118 501, 118400, B05C 302
Patent
active
050726927
ABSTRACT:
Apparatus for impregnating a liquid such as a resinous liquid into wood, in which timbers to be subjected to the impregnation are placed in a pressure tank which is capable of reducing or increasing the interior pressure thereof; the inside of the pressure tank is evacuated through a monitoring timber identical in properties with the timbers to be subjected to the impregnation, to expel the air present in the tank and the timbers; the liquid is injected into the pressure tank under pressurized conditions, while continuing the evacuation, to impregnate the liquid into the timbers; and the impregnation is completed when the liquid begins to flow out of the tank through the monitoring timber.
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