Lip preparation apparatus and method for improving the uniformity of a liquid curtain in a curtain coating system

摘要

A positioning unit positions a ledge (20) and a lip relative to each other in a first orientation in which the lip is arranged proximate a first surface portion (21) and in a second orientation in which the lip and the ledge are spaced from each other. Liquid composition flows from a slide die onto the first surface portion when in first orientation. Liquid composition forms a vertical liquid curtain in free fall when in second orientation.