SETT OCH ANORDNING FOR EN SAMTIDIG, TVASIDIG BEHANDLING AV EN LOPANDE PAPPERSBANA MED SAMMA BEHANDLINGSMEDEL

摘要

A method and apparatus for coating both sides of a moving web, such as a paper web, with the same coating material on both sides by feeding the web downwardly between a rotating support roller and a coating blade directed against said roller. One side of the web is partially wrapped around said roller and a first excess of coating material intended for the web side facing said roller is applied to the roller before or at the point of contact between said web and the roller. A second excess of coating material is applied to the other side of the web by feeding the web through a dam of coating material arranged below said contact point-in the moving direction of the web-said dam being formed substantially between said coating blade and holder and the said other side of the web. The excess coating material is laterally expressed in said dam beneath the top level thereof.