Coating processes – Measuring – testing – or indicating
Patent
1984-11-19
1986-04-08
Lusignan, Michael R.
Coating processes
Measuring, testing, or indicating
118 50, 118429, 118712, 427297, 427440, B05D 118, B05C 1100, C23C 1400
Patent
active
045812438
ABSTRACT:
A self-contained, portable wood treating apparatus and method for treating wood is disclosed. The wood treating apparatus includes a generally flat base in which a water tank is contained. A cylindrical pressure vessel is located above the base. A pair of elongate work tanks are located on respective sides of the pressure vessel between the pressure vessel and base. A reagent tank is also provided adjacent the base in which a concentrated treatment liquid is contained. A treatment system is provided for treating the wood located in the pressure vessel with a dilute treatment liquid contained in the work tanks. The treatment system includes a make up system for making up additional dilute treatment liquid by mixing water from the water tank and concentrated treatment liquid from the reagent tank. The improved method of operation includes the forming of dilute treatment liquid which is pumped into the pressure vessel to pressurize the pressure vessel and wood therein. This method also includes the steps of: pumping a diluent to the pressure vessel to pressurize the pressure vessel where the pumped flow rate of the diluent decreases as the pressure increases in the pressure vessel, measuring the flow rate of the pumped diluent, and adding concentrated reagent to the diluent being pumped in a varying proportional amount corresponding to the measured flow rate to form the proper concentration of dilute treating liquid in the pressure vessel.
REFERENCES:
patent: 4303705 (1981-12-01), Kelso
patent: 4337720 (1982-07-01), Hager
patent: 4433031 (1984-02-01), Allen
patent: 4466998 (1984-08-01), McIntyre et al.
Lusignan Michael R.
Permawood Treating Co.
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