Electrostatic painting apparatus having optically sensed...

Details Electrostatic painting apparatus having optically sensed... Electrostatic painting apparatus having optically sensed...

B - Operations, Transporting

05

B

32/17, 32/3, 73/

B05B 12/08 (2006.01) B05B 5/08 (2006.01) B05B 5/16 (2006.01) G01F 3/10 (2006.01) G01F 15/06 (2006.01)

Patent

CA 1317757

P-306 ELECTROSTATIC PAINTING APPARATUS HAVING OPTICALLY SENSED FLOW METER ABSTRACT OF THE DISCLOSURE A high-voltage electrostatic painting apparatus (10) for coating an article (12) inside a spray booth (14). The apparatus (10) includes a flow rate meter (34) disposed within the electrostatic environment for measuring the rate at which paint is supplied to a discharge atomizer (18). The meter (34) includes two intermeshing rotors (44,46) disposed within a sealed non- ferromagnetic housing (54). The two rotors (44,46) rotate in repose to liquid paint flowing through the housing (54). A magnetic coupling (64) acts through the housing (54) to drive an optical signal producing disc (62). A pick-up sensor (82) senses the optical signal from the disc (62) and sends that signal outside the booth (14) to a master control unit (40) via a fiber optic conductor (90). The master control unit (40) automatically adjusts a flow rate regulator valve (92) to provide a constant rate of paint flow to the discharge atomizer (18).

611527

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