Coating method
AssigneeFuji Photo Film Co., Ltd.
InventorsYasunori Tanaka, Shinji Noda, Hiroshi Chikamasa
Life of this patent
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Abstract
Method and apparatus for coating a web with a magnetic coating liquid in which the coating is applied exceedingly uniformly. The web to be coated is continuously transported past a nozzle in an extrusion-type coating unit with the magnetic coating liquid discharged through the nozzle and wherein: (a) V.sub.0 >0.3 m/sec, (b) 3 m/sec>V.sub.1 >0.1 m/sec, (c) 3>V.sub.1 /V.sub.0, and (d) 15 cm>d>0.2 cm where V.sub.0 is the coating liquid discharge speed at the nozzle of the extrusion-type coating unit, V.sub.1 is the coating liquid striking speed at the surface of the web, and d is the distance between the nozzle and the surface of the web.
Claims12
A method for coating a web comprising the steps of:
- continuously transporting a web to be coated past a nozzle in an extrusion-type coating unit;
- and discharging a magnetic coating liquid through said nozzle onto said web, wherein:
- (a) V.sub.0 >0.3 m/sec,
- (b) 3 m/sec>V.sub.1 >0.1 m/sec,
- (c) 3>V.sub.1 /V.sub.0, and
- (d) 15 cm>d>0.2 cm
- where V.sub.0 is the coating liquid discharge speed at said nozzle of said extrusion-type coating unit, V.sub.1 is the coating liquid striking speed at the surface of said web, and d is the distance between said nozzle and said surface of said web.
Dependencies are inferred from the claim text.