Coating method using an extrusion type coating apparatus

Details Coating method using an extrusion type coating apparatus Coating method using an extrusion type coating apparatus

1991-01-25

1992-04-28

Beck, Shrive

Coating processes

With post-treatment of coating or coating material

Solid treating member or material contacts coating

118410, B05D 312

Patent

active

051087952

ABSTRACT:
A coating method utilizing an extrusion type coating apparatus having a back edge surface and a doctor edge surface for continuous extrusion of a coating fluid from a slot formed between the back edge surface and the doctor edge surface for applying the coating fluid onto a surface of a flexible support running continuously over both the back edge surface and the doctor edge surface. The doctor edge surface is located on a downstream side of the running of the support is so as to form a single inclined planar surface or a curved surface with a single curvature, so that when a point A represents a downstream end of the doctor edge and a point B represents a slot-top portion of the back edge surface, a line AB connecting the points A and B is achieved so that the doctor edge surface does not intersect. .theta..sub.1 represents an angle between a tangent to the back edge surface at the point B and the line AB, and .theta..sub.2 represents an angle between the line AB and the support stretched downstream from the point A. The angles .theta..sub.1 and .theta..sub. 2 satisfy the conditions: 150.degree.<.theta..sub.1 <180.degree. and 150.degree.<.theta..sub.2 <180.degree., whereby the range of thickness of coating film to be supplied is adjusted by changing the angle .theta..sub.2.

REFERENCES:
patent: 4023526 (1977-05-01), Ashmus et al.
patent: 4424762 (1984-01-01), Tanaka et al.
patent: 4480583 (1984-11-01), Tanaka et al.
patent: 4581254 (1986-04-01), Cunningham et al.
patent: 4854262 (1989-08-01), Chino et al.

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