Press felt with asymetric fiber crosssection in a surface layer of lowest permeability
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United States of America Patent
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-
Jan 29, 1991
Grant Date -
N/A
app pub date -
May 31, 1989
filing date -
Jun 8, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A press felt (4) is provided for transporting a fibre web (3) through the press section of a paper making machine for efficiently receiving water from the fibre web (3), the press felt (4) includes at least one fabric layer and a surface layer on both sides of the felt (4), the air permeability of both surface layers being substantially smaller than that of all fabric layers. In order to make the removal of water more efficient and to avoid the rewetting of the web, the air permeability of surface layer of the press felt away from the fibre web is substantially smaller than the air permeability of the surface layer on the opposite side of the press felt, i.e., the side adjacent the web.
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