Apparatus and method for controlling coating frowns in hopper coating.

摘要

The method of supplying a coating composition to a moving support comprises: (a) providing a coating hopper having an inner and an outer cavity, each cavity having a first end at a first side, and a second end, at a second side of the coating hopper. The inner and outer cavity are in fluid communication through a slot extending from the first side to the second side of the hopper. The hopper has a supply slot in fluid communication with the outer cavity, supplying the coating composition to the moving support; (b) supplying the coating composition to the inner cavity at the first end; (c) adjustably supplying the coating composition to the second end of the outer cavity.