Apparatus for continuously coating a web with a liquid

摘要

A chamber having an opening in its wall contains a roller. A portion of the surface of the roller is situated in the opening. A web is continuously moved past the chamber so as to cover the opening. A vacuum is created in the chamber. The external pressure forces the web into contact with the roller. A coating liquid is supplied into the chamber so as to wet the roller. The roller is rotated so that the coating liquid is transferred to the web.