US 6,982,003 B2
Method and apparatus for curtain coating
Markus Gueggi, Marly (Switzerland); and Sedat Varli, Reichenburg (Switzerland)
Assigned to Dow Global Technologies Inc., Midland, Mich. (US)
Appl. No. 10/496,996
PCT Filed Dec. 12, 2002, PCT No. PCT/US02/39994
§ 371(c)(1), (2), (4) Date May 27, 2004,
PCT Pub. No. WO03/049870, PCT Pub. Date Jun. 19, 2003.
Claims priority of provisional application 60/340546, filed on Dec. 13, 2001.
Prior Publication US 2005/0011439 A1, Jan. 20, 2005
Int. Cl. B05C 3/02 (2006.01)
U.S. Cl. 118—410 16 Claims
OG exemplary drawing
 
1. An apparatus for curtain coating, particularly for high-speed curtain coating of a continuous paper web substrate, comprising a hopper means providing one or more liquid coating materials in the form of a free-falling curtain impinging the substrate at a dynamic wetting line and edge guide elements on both sides of said curtain are arranged supplying a wetting or auxiliary liquid and wherein each element has a length along its longitudinal axis extending in a direction of flow of said curtain from said hopper means and at, least one contact area directed towards and in contact with said curtain, said contact area having a multiplicity of grooves and ribs extending along the length of said edge guide elements thereby forming a ribbed contact area.