I designed and built this chip cleaner about 10 years ago and what is left of it is in the garage now. What you see is just a prototype that I used for testing. Yeah I know it looks like heck but I was more interested in the working mechanics, not appearance. It actually worked very well and did it mostly without electricity. The whole thing was designed using air logic valves with the intention that the casino could use a small air compressor to supply the air. The half round thing on the botton is where the chips went in. The cylinder next to it cycled to grab one chip and pulled it out into a slot leading to the wash station. There two cylinders with brushes on them would cycle up and down brushing both sides of the chip. When that was done another cylinder raised the chip up to a ramp leading to the drying station where after being dried a stop released and the chip rolled out of the machine. The whole cycle took 15 seconds and did a pretty good job on most chips. The only ones that would take longer were really dirty Paulson chips. Even I was surprised at how well it worked.
I investigated numerous cleaners and discovered one that no one else has ever mentioned that worked better than anything else I tried. I even tested it on hot stamped chips and it didn't seem to damage them (I was testing newer chips - not old, worn, valuable collectible chips). Is anyone interested in the name of the cleaner?