Apparatus and method for coating the exterior surface of a pipe

Coating processes – Spraying – Moving nozzle or projector

Reexamination Certificate

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Details

C427S421100, C427S181000, C118S313000, C118S323000, C118S315000

Reexamination Certificate

active

07105204

ABSTRACT:
The exterior surface of a pipe is coated around its full perimeter without rotation of the pipe or the complete coating apparatus. In one example, the coating apparatus includes coating heads attached to a rotor with the coating material supplied under positive air pressure via a stator. The coating heads rotate with the rotor and eject coating material onto the exterior surface of the pipe. In a second example, the coating apparatus is stationary and coating material is delivered under positive air pressure though chambers within the apparatus.

REFERENCES:
patent: 2357144 (1944-08-01), Stair
patent: 3208868 (1965-09-01), Strobel et al.
patent: 4595607 (1986-06-01), Betteridge et al.
patent: 5026451 (1991-06-01), Trzecieski et al.
patent: 5191740 (1993-03-01), Rose
patent: 5207833 (1993-05-01), Hart
patent: 5725668 (1998-03-01), Foster et al.
patent: 1009055 (1965-11-01), None
patent: 2 233 253 (1991-01-01), None
patent: 2 285 592 (1995-07-01), None
patent: 2285592 (1995-07-01), None
“Sprays”. Kirk-Othmer. Encyclopedia of Chemical Technology. 4th Ed. vol. 22. pp. 687-688.
“Coating Processes”. Kirk-Othmer. Encyclopedia of Chemical Technology. 4th Ed. vol. 6. pp. 661-667.

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