Method and apparatus for curtain coating
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United States of America Patent
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Jan 3, 2006
Grant Date -
Jan 20, 2005
app pub date -
Dec 12, 2002
filing date -
Dec 13, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus for curtain coating, particularly for high-speed curtain coating of a continuous paper web substrate (12) is provided with a hopper means (14) providing one or more liquid coating materials in the form of a free-falling curtain (16) impinging the substrate (12) at a dynamic wetting line. Edge guide elements (22, 24) are arranged on both sides supplying a wetting or auxiliary liquid. Each guide element (22, 24) has at least one contact area of its surface directed towards said curtain, which contact area has a multiplicity of grooves (32) and ribs (34) extending along the length of said edge guide elements (22, 24).
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