Impregnation of porous articles
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United States of America Patent
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May 17, 1983
Grant Date -
N/A
app pub date -
Oct 1, 1981
filing date -
Mar 14, 1980
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention provides an in-line method of impregnating a porous article, particularly a metal casting, which comprises placing the article on a support, placing a cover thereover in sealing relation with support to define an impregnation chamber, applying a reduced pressure to the cover at the upper part thereof, admitting impregnant to the chamber until it at least covers the pores, allowing the pressure to rise to substantially atmospheric, removing excess impregnant from the chamber, and removing the cover from the support. Such a method permits impregnation using a conveyor line system.
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