Patent ID: 6033476
Filing Date: 2000-03-07
Classification: B05C,B05D

Abstract:
A coating apparatus comprising:an upstream lip and at least two downstream lips, slots being formed between adjacent lips through which a coating liquid can be extruded forming a coating film consisting of at least two layers; anda pair of guide rollers disposed on opposite sides of said lips for guiding a support to move past said lips such that the coating liquid can be applied thereto,wherein at least one of said downstream lips has a coating operation surface facing and curved toward said support and for any two points on said surface of said downstream lip, a curvature k.sub.p of an upstream point of said surface and a curvature k.sub.q of a downstream point of said surface are set as P.sub.2 /T.ltoreq.k.sub.q .ltoreq.k.sub.p .ltoreq.P.sub.1 /T where T represents the tension in the coated portion of said support, and P.sub.1 and P.sub.2 represent the pressures of the coating liquid acting on said support at upstream and downstream ends of said coating operation surface.