Gravity Flow Type Patents (Class 34/165)
Trough or tube, with axially rotary conveyor or agitator (Class 34/166)
Plural gravity path, plural feed, and/or discharge (Class 34/167)
With gas or vapor flow for contact with treated material (Class 34/168)
With venting means or wall (Class 34/175)
With treated material tubes (Class 34/176)
With heating tubes (Class 34/177)
Shelf-to-shelf or zigzag treated material flow (Class 34/178)
  • Wood treating process
    Patent number: 3959529
    Abstract: A method for producing clean surface treated wood by subjecting the wood, containing the treating agent and its carrier, to steaming under pressure thereby to cause the solvent in the atmosphere about the wood to condense on the wood surface during the steaming, thereafter reducing the pressure to about atmospheric pressure, removing the carrier vapors from association with the wood as they form, and continuing the steaming until the carrier is substantially removed from the wood.
    Type: Grant
    Filed: June 14, 1974
    Date of Patent: May 25, 1976
    Assignee: The Dow Chemical Company
    Inventors: William D. Winn, Johnney T. Pollan
  • Process for drying wood
    Patent number: 3939573
    Abstract: A process for kiln drying timber in which heated air is passed over the timber, subsequently cooled to dehumidify it, and then reheated and recirculated, wherein times are substantially shortened by separating the process into two stages, a first stage where the temperature of the air passing over the wood is held relatively low, that is between 20.degree.C and 30.degree.C, and a second stage in which the temperature is raised to between 34.degree.C and 38.degree.C, the changeover from the first stage to the second being effected when the moisture content of the wood being dried has fallen to between 16 and 25 percent.
    Type: Grant
    Filed: October 31, 1974
    Date of Patent: February 24, 1976
    Inventor: Furio Berti