Method and assembly for controlling the coat profile in coaters based on short dwell time application

摘要

The present invention relates to a method and apparatus for controlling coat profile in short dwell time coaters and similar apparatuses. In these coaters the coating mix is applied on the web (2) in an application chamber (11) disposed immediately in the rear of the doctor element (5), and the coating mix contacts the web (2) only for a short time. An excess amount of the coating mix is fed into the application chamber (11) and the mix is arranged to flow over the front edge (12) of the chamber (11) counter to the running direction of the web (2). The invention is based on controlling the cross-machine coat profile by altering the distance between the web (2) and the front edge (12) of the application chamber (11) in the cross-machine direction of the web (2).