Just looking back at the current patent I see they kept that information in there. Way to much detail IMO . They also list Air Products as a machine for either cooling or cooling and grinding plastic pellets.
Systems to accomplish this task have been developed for cryogenic freezing of the plastic pellets and the aluminum powders: the Air Products Process Cooling System, and for impact jet pulverizing of these cryogenic-frozen pellets and the aluminum powder: the Micron-Master jet mill manufactured by The Jet Pulverizer Company.
http://www.airproducts.com/Products/Equipment/C...
Always listen to experts, They'll tell you what can't be done and why. Then do it.
---Robert Heinlein---
