Method and assembly for coating a moving web

Details Method and assembly for coating a moving web Method and assembly for coating a moving web

D - Textiles, Paper

21

H

D21H 25/16 (2006.01)

Patent

CA 2152448

In air-knife coating the coating mix is applied by means of a suitable application method onto the web (1) to be coated and the coating mix is doctored to desired coating thickness by blowing a sharp air jet (7) discharged from the air knife (6) so as to impinge on the web (1). Air-knife doctoring occurs most successfully along the upper boundary of the filter-cake layer which forms in the coating after applica- tion. According to the invention, this phenomenon is utilized for coat weight control by adjusting the distance between the point of application and the point of doctoring.

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