B - Operations – Transporting – 05 – B
Patent
B - Operations, Transporting
05
B
32/59, 32/16.9
B05B 15/00 (2006.01) B05B 3/02 (2006.01) B05B 5/04 (2006.01) B05B 12/14 (2006.01) B05B 15/02 (2006.01) B05B 7/08 (2006.01)
Patent
CA 1189696
Abstract of the Disclosure A color change valve structure for rotary head electrostatic spray coating systems, of the type to which a rapid rotation is imparted to a rotary spray head and coating material directed through an orifice against the head for discharge from a peripheral edge of the head in a spray, is characterized by coating material and dump valves behind the head i n close proximity with the orifice. The coating material valve controls a flow of coating material from a supply line to the orifice, and the dump valve is operable to establish a passage from the supply line, through the material valve and to a dump outlet. To purge the system of coating material of one color in preparation for spraying material of another, the material valve is closed, the dump valve is opened and a flow of flushing media is established through the supply line, whereby the flushing media cleanses the supply line and material valve. Thereafter, the dump valve is closed and the material valve momentarily opened to cleanse the passage between the material valve and orifice, whereupon the system is prepared to spray coating material of another color. The arrangement of the valves enables rapid and thorough flushing of the system, and the close proximity of the material valve to the orifice minimizes the quantity of coating material and flushing media impinged on the head during color change processes.
394921
Culbertson Samuel W.
Mcculloch Charles W.
Williams Keith G.
Binks Manufacturing Co.
Macrae & Co.
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