Coating delivered as bubbles

Details Coating delivered as bubbles Coating delivered as bubbles

1977-12-29

1979-06-12

Kaplan, Morris

Coating processes

Vacuum utilized prior to or during coating

118410, 427356, 427445, B05D 126

Patent

active

041580761

ABSTRACT:
In a method of treating a surface such as a paper web with a treating agent, the treating agent is foamed under pressure and delivered via a passsageway to an application zone so as to come into close proximity with the surface to be treated which may be moved continuously past the application zone. A constriction, upstream in the direction of foam flow, of the passageway causes a pressure drop in the body of the foam causing bubbles of the foam to burst adjacent the surface, being treated whereby the treating agent is applied to the surface.

REFERENCES:
patent: 3218193 (1965-11-01), Isaacson
patent: 3724418 (1973-04-01), McLain
patent: 4023526 (1977-05-01), Ashmus et al.

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