Method for wood precharring

Details Method for wood precharring Method for wood precharring

1978-09-15

1979-10-09

Lusignan, Michael R.

Coating processes

Flame contact

34 138, 427 55, 427317, 428907, 428921, B05D 308, B05D 302

Patent

active

041706684

ABSTRACT:
A method of forming a prechar-layer on wood to cause it to become fire and rot retardant. In an air or a low oxygen concentration atmosphere the wood is uniformly charred at a depth of at least 3 millimeters by a high-intensity radiant heat panel. Normally the heat panel is spaced from and moved with respect to the wood. The relative velocity of the wood past the radiant panel and the panel's emitted heat flux are used to control the depth of charring. Preferably fire and/or rot retard chemicals and/or treatments are added to the formed charred layer to further increase the wood's fire and rot retardancy.

REFERENCES:
patent: 18828 (1857-12-01), Tenney et al.
patent: 35811 (1862-07-01), Lapparent
patent: 3369919 (1968-02-01), Inglis
patent: 3671299 (1970-02-01), Barnett
patent: 4064386 (1977-12-01), Numrich
patent: 4071637 (1978-01-01), Dittrich

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