Impregnation apparatus having bias-opening means

Coating apparatus – With vacuum or fluid pressure chamber

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Details

118429, 220437, B05C 910, B05C 1111

Patent

active

041290917

ABSTRACT:
A body, or stack of bodies, made of timber or of other organic fluid-permeable material is impregnated with an impregnant by introducing the body or stack into a receptacle of fluid-impermeable material through an opening therein, the flexible receptacle being supported by and secured (e.g. by springs) to a substantially rigid structure in such a way that the receptacle is held open for the introduction through said opening of the body or stack. The opening in the receptacle is sealed to form a fluid-tight enclosure and air is evacuated from within the enclosure and from voids in the or each body housed therein to cause the flexible receptacle to collapse around the body or stack. Impregnant is allowed to enter the evacuated enclosure and to flow through and impregnate the or each body.

REFERENCES:
patent: 899480 (1908-09-01), Buehler
patent: 2394853 (1946-02-01), Goddard
patent: 3639152 (1972-02-01), Page et al.
patent: 3730308 (1973-05-01), Pelavin
patent: 3731828 (1973-05-01), Clarke et al.
patent: 3895138 (1975-07-01), Sewell et al.
patent: 3968276 (1976-07-01), Allen
patent: 4007706 (1977-02-01), Arvidsson
patent: 4013809 (1977-03-01), Marocco
patent: 4017980 (1977-04-01), Kleinguenther
patent: 4060953 (1977-12-01), Milne

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