Method and apparatus for coating a paper web

Details Method and apparatus for coating a paper web Method and apparatus for coating a paper web

D - Textiles, Paper

21

H

D21H 23/34 (2006.01)

Patent

CA 2102450

[57] Abstract A method and apparatus for coating a paper web (13). According to the method, a coating mix is applied on a paper web (13) using an applicator unit (12) which forms a linear mechanical force on the web (13) against a backing surface (16) situated on the back side of the web (13), and the coating mix applied on the web (13) is doctored using a doctor unit (14) acting against a backing surface (18). According to the invention, the application of the coating mix takes place backed by a first backing surface (16), and the coating mix is doctored backed by a second backing surface (18), whereby speed of at least one of said backing surfaces (16, 18) is independently controlled relative to the speed of said first backing surface (16) and the web speed in order to attain a control the tensile stress of the web. (Fig. 4)

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