Method and apparatus for impregnating a porous substrate with a solids-bearing saturant
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United States of America Patent
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Jul 7, 1998
Grant Date -
N/A
app pub date -
Jun 26, 1996
filing date -
Jun 26, 1996
priority date (Note) -
Expired
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Abstract
A method and apparatus for impregnating a porous substrate with a solids-bearing saturant first introduces the saturant into the substrate from a first side, and then introduces a displacement material into the substrate from the first side. This displacement material forces at least some of the saturant in the substrate farther into the substrate, away from the first side. A wide variety of devices can be used for introducing the saturant and the displacement material into the substrate, including pressure saturators, converging chamber pressure saturators, roller coaters, blade coaters, and the like. By pushing the saturant away from the first side with the displacement material, the first side can be made more suitable for further processing such as adhesive bonding.
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