Method and apparatus for simultaneously applying a multi-layered

Details Method and apparatus for simultaneously applying a multi-layered Method and apparatus for simultaneously applying a multi-layered

1992-10-19

1995-01-24

Beck, Shrive

Coating processes

With post-treatment of coating or coating material

Solid treating member or material contacts coating

427131, 118411, B05D 312, B05C 302

Patent

active

053841620

ABSTRACT:
A coating method and a coating apparatus which assure that an upper layer and a lower layer, each composed of a thin film, are excellently simultaneously coated on a web while forming a laminated structure without the appearance of strip-shaped irregularities in the coated layers, not only by preventing foreign particles in the coating liquids from being entrapped on a doctor edge surface, but also by preventing the boundary surface between the upper layer and the lower layer from being adversely disturbed. Each of a first doctor edge and a second doctor edge has an arc-shaped sectional contour. An imaginary straight line L.sub.1 tangentially extends along the doctor edge surfaces of the first and second doctor edges. With a position where the straight line L.sub.1 intersects a perpendicular line extending upward of an upstream end of the second doctor edge designated by an intersection D, a distance t between the upstream end B and the intersection D is within the range of 5 .mu.m.ltoreq.t.ltoreq.30 .mu.m.

REFERENCES:
patent: 4681062 (1987-07-01), Shibata et al.
patent: 4854262 (1989-08-01), Chino et al.
patent: 5069934 (1991-12-01), Chino et al.

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