Coating processes – Falling curtain of coating material utilized
Reexamination Certificate
2006-09-05
2006-09-05
Bareford, Katherine (Department: 1762)
Coating processes
Falling curtain of coating material utilized
C427S294000, C427S299000, C118S324000, C118S050000, C118S068000, C118SDIG009
Reexamination Certificate
active
07101592
ABSTRACT:
In a method and an apparatus for curtain coating of a moved substrate like a paper web substrate is moved below a liquid supply means providing a single or multilayer liquid coating in the form of a free-falling curtain impinging the substrate at a dynamic wetting line and a blade or air shield located upstream of the dynamic wetting line with respect to the moving direction of the substrate. The dynamic wetting line of the coating curtain on the substrate or web is oriented generally perpendicular to the moving direction of the substrate or web, providing substantially the same air pressure over an essential part of the coating curtain on its front and back side with respect to the moving direction of the substrate and providing a first supply air flow upstream to the wetting line. The supply air flows over a substantial length along the free-falling curtain and evacuates air from a location upstream of the supply air flow so that the air near the dynamic wetting line is moved against the moving direction of the substrate web and the boundary air layer entrained to the substrate. A second supply air is provided in proximity to the wetting line.
REFERENCES:
patent: 3508947 (1970-04-01), Hughes
patent: 5206057 (1993-04-01), Finnicum et al.
patent: 5224996 (1993-07-01), Ghys et al.
patent: 5624715 (1997-04-01), Gueggi et al.
patent: 5976630 (1999-11-01), Korokeyi et al.
patent: 6146690 (2000-11-01), Kustermann
patent: 6162502 (2000-12-01), Schweizer et al.
patent: 6524388 (2003-02-01), Yamada et al.
patent: 0 489 978 (1992-06-01), None
patent: 1 142 647 (2001-10-01), None
patent: 09 141170 (1997-10-01), None
patent: 2001-300386 (2001-10-01), None
patent: WO 01/16427 (2001-03-01), None
Gueggi Markus
Varli Sedat
Bareford Katherine
Dow Global Technologies Inc.
LandOfFree
Method and apparatus for curtain coating does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for curtain coating, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for curtain coating will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3615123