Coating thickness control nozzle

Coating apparatus – With heat exchange – drying – or non-coating gas or vapor... – To remove or spread applied coating by gas blast

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Details

118419, 427349, B05C 1106

Patent

active

043218849

ABSTRACT:
An improved nozzle structure for directing a wide, thin jet stream of a gaseous medium from an outlet nozzle opening onto the surface of a running length of a flexible substrate or strip emerging from a liquid coating bath provides more accurate control of the thickness and the distribution of the coating liquid. The nozzle structure has a plurality of elongated, parallel plenum chambers each having its length dimension extending transversely of and being at least substantially as great as the width of the strip being coated. Gaseous fluid is supplied under pressure to the nozzle structure through a plurality of inlet openings spaced along the length dimension of one plenum chamber and uniform, narrow slot openings along substantially the full length of the chambers provides fluid communication between successive chambers from the inlet to the outlet nozzle whereby substantially uniform pressure is obtained along the full length of the narrow outlet nozzle.

REFERENCES:
patent: 3141194 (1964-07-01), Jester
patent: 3314163 (1967-04-01), Kohler
patent: 3499418 (1970-03-01), Mayhew
patent: 3917888 (1975-11-01), Beam et al.
patent: 4041895 (1977-08-01), Overton et al.
patent: 4078103 (1978-03-01), Thornton et al.

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