Device for impregnation of webs of porous materials
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United States of America Patent
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Jan 16, 2001
Grant Date -
N/A
app pub date -
Feb 5, 1996
filing date -
Feb 7, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A device for impregnation of webs of porous materials with a liquid impregnating medium under increased pressure comprises a roller rotatable about a horizontal axis, a trough arranged so that the roller is partially inserted in the trough to form a chamber between an inner surface of the trough and an outer surface of the roller, a unit for supplying an impregnating medium into the chamber, and a unit forming an inlet slot for introducing a web to be impregnated into the chamber and an outlet slot for withdrawing the impregnated web from the chamber. The chamber over a path from the inlet slot to the outlet slot narrows and again increases many times.
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