| 摘要 |
<p>The present invention relates to an assembly for preventing striping in an applicator used for coating a paper or paperboard web, the applicator comprising a doctor blade (3) suitable for metering and smoothing a coat to be applied, a cross-machine elongated application chamber (13) adapted immediately in front of the doctor blade (3), in which chamber one of the sides is formed by the web (2) being coated, a flexible leading blade (4) having its stem perforated with openings (5) for the purpose of taking coating mix from the application chamber (13) to in the front of the leading blade (4) and the leading blade (4) further sealing the front edge of the application chamber (13). The invention is based on forming a homogenizing chamber (12) in front of said openings (5) of said leading blade (4) with the help of a dam lip (11) or similar flow barrier, in which chamber the flow exiting the openings (5) of said leading blade (4) is homogenized as the flow impinges against said flow barrier. <IMAGE></p> |
