Method for smoothening a paper web before coating
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United States of America Patent
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Nov 26, 2002
Grant Date -
May 23, 2002
app pub date -
Feb 23, 2001
filing date -
Feb 25, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A paper web is smoothened by passing the web through a pre-calender device on a paper machine before the application of a coating. The pre-calender device comprises at least one pair of steel rolls, one of which is heated, and a liquid application device which applies a thin film of water to the surface of the web which contacts the heated roll before the web enters the nip between the rolls. The web is then dried after exiting the nip either by wrapping the heated roll and/or by applying heat externally to the web.
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