Patent ID: 9676009
Date: 2017-06-13
CPC Classifications: A61L,B01D,B08B,C11D,G07D

Claim:
1. An apparatus for cleaning a stack of banknotes, each banknote including a substrate, visual data and a security feature, comprising: a chamber containing a supercritical fluid at a temperature and a pressure and for a duration sufficient to disinfect or decontaminate the banknotes and not compromise the security feature and the visual data of the banknotes; the chamber further containing a structure holding the stack of banknotes so that the supercritical fluid circulates through and around the banknotes to remove one or more substances into the supercritical fluid; and a strapping machine securing a securing mechanism to the stack of banknotes; wherein the visual data is printed on the substrate using Flexo inks, gravure inks, intaglio inks, dry color pigments blended with oils and extenders, or phosphor chips containing micro-interference layers; and wherein the security feature includes laminated polymer or paper security threads, windowed security threads, quasi-public security threads, magnetic inks or threads, demetalized security threads, lenticular lens array security threads, fluorescent or non-fluorescent security threads, holographic features, planchettes, digital watermarks, numeric watermarks, Guilloche patterns, microprinting, applied foils, blind embossings, latent images that render different information from different viewing angles, optically variable pigments producing different color effects depending on viewing angles, metallic effect inks, inks that fluoresce or phosphoresce under illumination with ultraviolet or infrared sources, or M features.