Impregnation of porous articles
AssigneeUltraseal International Limited
InventorPeter D. Young
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Abstract
A method of impregnating a porous article with impregnant to seal the pores thereof, which comprises placing the article in a vessel, evacuating the vessel to withdraw air from the pores, releasing the vacuum with the pores beneath the surface of a liquid impregnant in the vessel, removing excess impregnant from the vessel, washing excess impregnant from the surface of the article by supplying washing fluid to the vessel, removing the fluid from the vessel, heating the article while still within the vessel to effect curing of the impregnant within the pores, and removing the impregnated article from the vessel.
Claims11
A method of impregnating a porous article with impregnant to seal the pores thereof, which comprises placing the article in a vessel, evacuating the vessel to withdraw air from the pores, releasing the vacuum with the pores beneath the surface of a liquid impregnant in the vessel, removing excess impregnant from the vessel, washing excess impregnant from the surface of the article in said vessel by supplying washing fluid to the vessel, removing the fluid from the vessel, heating the article while still within the vessel to effect curing of the impregnant within the pores, and removing the impregnated article from the vessel, wherein the article is rotated during at least a portion of the treatment of the article.
Apparatus for impregnating a porous article with impregnant to seal the pores thereof comprising a pressure vessel, means for supporting the article within the vessel, means for applying a vacuum to the vessel and removing it therefrom, means for supplying liquid impregnant to the vessel and removing it therefrom, means for supplying washing fluid to the vessel and removing it therefrom and means for heating the article within the vessel, wherein said means for supporting the article is adapted to rotate the article.
Dependencies are inferred from the claim text.