B - Operations – Transporting – 05 – C
Patent
B - Operations, Transporting
05
C
32/70
B05C 15/00 (2006.01) B01D 46/10 (2006.01) B01D 50/00 (2006.01) B05B 15/12 (2006.01)
Patent
CA 1160827
Abstract A spraying system for applying a coating to articles includes a spray booth having bottom, top, and hack surfaces and a spray gun for depositing spray coating material onto the articles as they are conveyed through the booth. The bottom surface of the spray booth includes a hopper for collecting undeposited coating material and the top surface of the spray booth includes a vent opening. An exhaust fan is coupled to the vent opening for pulling atmosphere from within the spray booth in a first direction through the vent opening to maintain a negative atmospheric pressure within the spray booth. A baffle is positioned between the spray gun and the vent opening for deflecting undeposited coating material in the atmosphere and allowing it to fall by gravity into the hopper, and a filter media is positioned between the baffle and vent opening for collecting any remaining undeposited coating material present in the atmosphere before being pulled through the vent opening. A clean air plenum is mounted to the spray booth adjacent the vent opening and houses a high-pressure air source and two venturi tubes for periodically directing a pulse of air through the filter in a second direction to dislodge the collected coating material therefrom and allow it to fall by gravity into the hopper. In the method of maintaining a negative atmospheric pressure within the spray booth and of collecting undeposited coating material, the atmosphere is pulled from within the spray booth first past a baffle and then through a filter media prior to being exhausted through the vent opening.
386000
Koch (george) Sons Inc.
Smart & Biggar
LandOfFree
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