Method of applying liquid to solid surfaces

Details Method of applying liquid to solid surfaces Method of applying liquid to solid surfaces

1977-05-09

1979-12-25

Esposito, Michael F.

Coating processes

Interior of hollow article coating

Vacuum or pressure utilized

427230, 427294, 118DIG2;10;254;256, B05D 722

Patent

active

041806018

ABSTRACT:
A method and apparatus are provided for applying liquid to solid surfaces to which access may be limited or restricted. Liquid is continuously fed to an applicator where the liquid clings to a supporting surface to form a bead defining an outwardly exposed meniscus protruding beyond the applicator. The applicator is moved along the surface in a proximate relationship thereto which brings the protruding meniscus into contact with the surface to wipe liquid onto the surface, the applicator all the while being spaced a slight but noncritical distance from the surface. A portion of the liquid wiped onto the surface is immediately aspirated from the surface by suction applied through the applicator to leave on the surface a deposit of liquid controlled in quantity by the degree of aspiration accompanying the wiping of liquid onto the surface. The continuous aspiration of liquid from the liquid bead forming the protruding meniscus on the applicator prevents dripping of liquid from the applicator and functions in conjunction with continuous feeding of liquid to the meniscus to provide a continuous circulation of liquid on the applicator, even when it is awaiting usage, with no fouling of the applicator and no stagnation or deterioration of the liquid on the applicator.

REFERENCES:
patent: 2694211 (1954-11-01), Warren
patent: 3404025 (1968-10-01), Wootten
patent: 3413143 (1968-11-01), Cameron et al.
patent: 3533833 (1970-10-01), Takahashi et al.
patent: 3827397 (1974-08-01), Hebberling
patent: 3900866 (1975-08-01), Bell et al.

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