B - Operations – Transporting – 05 – B
Patent
B - Operations, Transporting
05
B
137/52, 32/59
B05B 12/00 (2006.01) B05D 1/02 (2006.01)
Patent
CA 1047759
ABSTRACT OF THE DISCLOSURE The disclosure relates to automatic paint spray systems, typically but not necessarily of the electrostatic type, provided with color change means and facilities for recovery and re-use of the residual paint increment contained in the system at the start of a color change cycle. The system includes an automatic color change cycle in a paint spray system, in which original paint is purged from the system by terminating the supply of the original paint and introducing purge fluids, including solvent and possibly also air. The original paint is purged through a discharge line, on the downstream side of the paint spray devices, and is collected in a suitable receptacle, along with the purged solvent. The system includes the ability of the discharge system to automati- cally separate and isolate the original paint from the new color paint, so that the purged paint may be collected in a segregated container and re-used. In a high volume application production operation, for example, it may be necessary or desirable to execute a color change cycle dozens of times in a typical production day, so that significant savings can be realized by enabling segregated col- lection and ultimate re-use of the purged materials. In a typical commercial installation, savings in excess of $20,000 per year are to be anticipated. Perhaps more importantly, the savings of materials is of great significance because of the limited avail- ability from time to time of some paints and solvents, regardless of cost.
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