Apparatus for strengthening porous plates by impregnation
AssigneeGeorg Fischer Brugg-Oehler AG
InventorOskar Bernath
Life of this patent
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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.
Claims11
An apparatus for impregnating the edge areas of plates made of a porous material with a hardening fluid for strengthening and solidifying the edge areas comprising the combination of
- a container for holding a body of hardening fluid;
- a cover for said container, said cover being liftable and lowerable away from and toward said container between an open position and a closed position;
- means for lifting and lowering said cover;
- means for forming an airtight seal between said cover and container when closed;
- a support frame attached to said cover for supporting from below a stack of plates to be treated;
- means for lifting and lowering said support frame with a stack of plates to be treated supported therein relative to said cover between a first position above the hardening fluid and a second position submerged in the hardening fluid while said cover is sealed and to said container;
- means carried by said cover for applying pressure to the top of said stack of plates;
- and
- means coupled to said container for varying the pressure therein from a pressure substantially below atmospheric pressure to a presure at least as great as atmospheric pressure.
An apparatus according to claim 10 wherein said tackle assembly comprises
- first and second rotatable shafts;
- a plurality of hoisting drums mounted on said shafts for rotation therewith;
- and
- cables fixedly attached to said support frame and said drums, said cables being coilable on said drums as said shafts are rotated.
Dependencies are inferred from the claim text.