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US 5,075,131 AGranted
Method for preservation treatment of wood
AssigneeFuyo Lumber Sales Co., Ltd.
InventorsNobuaki Hattori, Kuniharu Yokoo
Life of this patent
Estimating the term…
Abstract
A method for preservation treatment of wood comprises the steps of radiating a laser beam on a part of the surface of the wood at the least to form small holes therein, impregnating the wood with a preservative, and then applying high frequency waves to the wood to dry it by dielectric heating.
Claims2
A method of preservation treatment of wood, comprising the steps of
- radiating a laser beam on a part of a surface of large, green wood or seasoned wood to form small deep holes in said wood so that some undamaged cell walls of said wood are exposed to air through each hole to promote movement of moisture from the interior of the wood,
- impregnating said wood at least through said holes with a preservative in the form of a liquid or a solution, to enable uniform impregnation, and then
- heating said wood with high frequency waves to remove the moisture contained therein.
Dependencies are inferred from the claim text.