In the ’90s, Japanese conglomerate Hitachi, through its subsidy Hitachi-Omron Terminal Solutions, introduced the Clean ATM, which cleaned the bank notes during transactions. The Baltimore Sun (11-Dec-1996) notes,
Hitachi has turned its talents to money-laundering of a literal kind, with an automated teller machine that sterilizes and irons yen notes before dispensing them.
Hitachi did not set out to sanitize the money; its engineers were trying to solve the problem of crumpled bills, which tended to jam machines, a company spokesman says. They solved the problem by running the bills through rollers heated to 392 degrees [Fahrenheit, 200 degrees Celsius]—any hotter would singe paper money—and discovered that the process also killed bacteria.