Modified spray guns for vaporous amine-assisted spray coatings a

Details Modified spray guns for vaporous amine-assisted spray coatings a Modified spray guns for vaporous amine-assisted spray coatings a

1988-05-27

1989-06-27

Kashnikow, Andres

Fluid sprinkling, spraying, and diffusing

Processes

Including electrostatic charging

239 13, 239112, 239135, 239708, B05B 124, B05B 1502

Patent

active

048421960

ABSTRACT:
Disclosed are modified spray guns, particularly electrostatic spray guns, for implementation of the vaporous amine catalyst spray method disclosed in U.S. Pat. No. 4,517,222. In particular, the present invention broadly is directed to a spray gun for spraying atomized liquid, e.g. vapor permeation curable paint, with the assistance of a vaporous amine flow via an amine flow path established in the gun wherein the improvement including a device actuable in the absence of the vaporous amine flow to cause a heated non-amine gas, preferably heated air, to flow through and purge the amine flow path within the gun for maintaining a desired flow path temperature adequate for suppressing amine condensation in said flow path. The spray gun can be a hand spray gun or an automated spray gun utilizing air atomization or mechanical atomization, operating under electrostatic spray conditions if desired. Specific techniques for implementing the purge air technique of the present invention adaptable for a variety of conventional spray guns are disclosed in detail.

REFERENCES:
patent: 1778551 (1930-10-01), Entyre
patent: 1786394 (1930-12-01), Tracy
patent: 1990824 (1935-02-01), Gustafsson
patent: 2271779 (1942-02-01), Peeps
patent: 2827112 (1958-03-01), Inskeep
patent: 3013730 (1961-12-01), Bok et al.
patent: 3873023 (1975-03-01), Moss et al.
patent: 4262848 (1981-04-01), Chabrid
patent: 4517222 (1985-05-01), Blegen

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