| 摘要 |
DEVICE FOR APPLYING COATING COLOR TO A FIBER WEB A device for applying coating composition to a fiber web. At least one application roll for receiving a machine width film of coating color at a feed location and for then delivering it to the fiber web at a delivery location. A nozzle applicator feeds coating color to a machine width nozzle at the feed position of application roll. The nozzle has a downstream lip with a metering doctor on it for metering the thickness of the coating color applied to the roll. The nozzle has an upstream lip in the form of an overflow ledge spaced from the surface of the application roll. Coating liquid overflows the overflow ledge and is collected in a first overflow trough. To clean the outer surface of the application roll before coating color is thereto applied, a scraper blade scrapes the surface of the roll. Upstream in the rotation path from the scraper blade is a sprayer for spraying liquid on the application roll so that the scraper scrapes the surface of the application roll with liquid on it. A separate liquid collection trough is positioned to receive liquid scraped from the surface of the application roll by the scraper blade. The scraper blade is adjustable to adjust the width of a slot between the scraper blade and the surface of the roll. The scraper blade forms a part of a guide wall for leading liquid which has been scraped off into the liquid collection trough.
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