Apparatus for strengthening porous plates by impregnation
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United States of America Patent
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Sep 1, 1981
Grant Date -
N/A
app pub date -
Mar 13, 1979
filing date -
Apr 4, 1978
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Plates made of porous material are strengthened by impregnation with a hardening fluid. The plates are stacked, subjected to vacuum in a chamber and immersed in the treating fluid, and pressure is then exerted on the fluid. The apparatus includes a chamber which contains a body of the fluid and which can be made airtight by applying a cover. The cover carries a support frame which carries a stack of plates, the cover having a hoisting device to lower the frame and stack into the fluid. A vacuum source and pressure source are connected to the container through a control valve.
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