Method for applying a coating liquid to a web

Details Method for applying a coating liquid to a web Method for applying a coating liquid to a web

Filed on

1992-06-18

Date issued

1993-05-11

Examiner

Jones, W. Gary

Patent Class

Coating processes

SubClass

Immersion or partial immersion

Other Related Categories

118410, 118419, 427128, B05D 118, B05C 302

Type

Patent

Status

active

Patent number

052099547

Description

ABSTRACT:
A method for applying a coating liquid and a method for forming a coating liquid application device are taught. According to the method, a portion of an applied liquid supplied into a liquid reservoir is drained from one end thereof, and the other portion of the liquid is continuously discharged from the outlet portion of a slot which faces the surface of a flexible band-like carrier moving continuously so as to form a thin film of liquid on the surface. In this liquid application device, the diameter D of the reservoir, the width d of the slot, the depth L.sub.1 of the slot from the reservoir to the outlet portion at the applied liquid supply end of the reservoir, the depth L.sub.2 of the slot from the reservoir to the outlet portion at the applied liquid drain end of the reservoir, the length W of the outlet portion, the viscosity .eta..sub.p of the liquid in the reservoir, the viscosity .eta..sub.s of the liquid in the slot, the supplied quantity Q.sub.1 of the liquid and the drained quantity Q.sub.2 of the liquid are selected to comply with: ##EQU1##

REFERENCES:
patent: 4416214 (1983-11-01), Tanaka et al.
patent: 4480583 (1984-11-01), Tanaka et al.
patent: 4982687 (1991-01-01), Takahashi et al.

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