Protective atmosphere gas wiping apparatus and method of using

Details Protective atmosphere gas wiping apparatus and method of using Protective atmosphere gas wiping apparatus and method of using

1980-04-11

1981-09-01

Kendall, Ralph S.

Coating processes

With post-treatment of coating or coating material

Gas jet or blast mechanically treats coating

427432, 118 63, 118420, 15306A, C23C 100, B05C 1106

Patent

active

042872383

ABSTRACT:
A combined gas wiping die and closed protective atmosphere chamber for treating linear material issuing from a molten metal coating bath is provided with gas exit orifices leading from the hood to the external environment. The gas exit orifices have a combined cross sectional area less than the total cross sectional area of the throat of the wiping die. The combined wiping die and protective chamber with limited area exit orifices is used with a wiping gas such as nitrogen or argon. The thickness of molten coatings on linear material wiped with the combined die and protective chamber can be very accurately controlled by changes in wiping gas pressure.

REFERENCES:
patent: Re19758 (1935-11-01), Underwood
patent: 2095537 (1937-10-01), Underwood
patent: 3270364 (1966-09-01), Steele
patent: 3707400 (1972-12-01), Harvey et al.
patent: 3828723 (1974-08-01), Herman

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