Drying and gas or vapor contact with solids – Apparatus – With means to treat gas or vapor
Patent
1975-06-23
1977-06-07
Camby, John J.
Drying and gas or vapor contact with solids
Apparatus
With means to treat gas or vapor
34 92, F26B 504
Patent
active
040274012
ABSTRACT:
Apparatus and process for curing and/or treating wood items such as logs and cut lumber. In one form of the invention a baffle is medially interposed in a closed chamber, separating such chamber into positive and negative pressure compartments, such baffle clamping to the lumber to be cured. A vacuum pump applies pressure to one compartment within the vessel and vacuum to the remaining compartment of the vessel, for the purpose of aiding with the withdrawal of resin from the wood. A resin solvent or diluent is introduced at the pressure side for rendering less viscous the resin contained in the lumber, to thereby aid in its travel through and withdrawal from such lumber. The return circuit to the vacuum pump includes a resin collector and also a water-moisture trap. Other fluid additives such as fireproofing and anti-rotting fluid materials may be introduced in the pressure side of the vessel. In a second embodiment, a tree trunk is held vertically in the field at the situs of its cutting and is supplied vacuum and pressure for curing and/or treating such trunk as a log prior to transport. In a third embodiment of the invention centrifugal force is relied upon to aid in the recovery of the resin from lumber or logs being cured.
REFERENCES:
patent: 116969 (1871-07-01), Lear
patent: 231783 (1880-08-01), Flad
patent: 1721297 (1929-07-01), Goodall
patent: 2387595 (1945-10-01), Luth et al.
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