Method and apparatus for curtain coating
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United States of America Patent
Stats
-
Jan 30, 2007
Grant Date -
Dec 16, 2004
app pub date -
Dec 12, 2002
filing date -
Dec 13, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus for curtain coating of a moved substrate, particularly for high-speed curtain coating of a continous paper web substrate, wherein a substrate (12) is moved below a hopper means (14), provides one or more liquid coating materials in the form of a free-falling curtain (16) impinging the substrate at a dynamic wetting line. (21) Edge guide elements (22, 24) are used for stabilizing the width and equalizing the flow speed of the coating curtain and allowing disturbance free provision of an auxiliary liquid (13) as well as practically compelte removal of the auxiliary liquid (23) wilst preventing the forming of solidification on the edge guides elements. An auxiliary liquid is injected (32) essentially parallel to the flow direction of the coating film at an edge of the coating film wilst moving along a slide of said hopper arrangement.
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Cited Art Landscape
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