Coating processes – Falling curtain of coating material utilized
Patent
1996-05-16
1997-08-05
Bareford, Katherine A.
Coating processes
Falling curtain of coating material utilized
427422, 427424, 427426, 118302, 118324, 118DIG4, 239431, 239424, 239426, 239433, 239568, B05D 130, B05C 500
Patent
active
056540400
ABSTRACT:
Methods and apparatus for spraying a liquid or hot melt material involve placing the material in a plurality of parallel grooves arranged across the entire width of a movable member and then causing a compressed gas to impinge upon the material in the grooves, thereby to spray the material from the grooves toward a substrate, as by extending, fiberizing or atomizing the material, or by mixing a gas with the material. For some materials of relatively high viscosity, a scraper is used to scrape the material from the grooves, and the compressed gas impinges the material while it is on the scraper, thereby to cause spraying. This provides a wide band deposition of a liquid or hot melt material with uniform material distribution across the entire width, along with improved ability to quantify the amount of material deposited on the substrate.
REFERENCES:
patent: 4128667 (1978-12-01), Timson
patent: 4346849 (1982-08-01), Rood
patent: 4767057 (1988-08-01), Degli et al.
patent: 5409733 (1995-04-01), Boger et al.
patent: 5418009 (1995-05-01), Raterman et al.
patent: 5423935 (1995-06-01), Benecke et al.
patent: 5427317 (1995-06-01), Huttlin
Bareford Katherine A.
Nordson Corporation
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