Epson EcoTank ET-4850 Driver Download -The Epson EcoTank ET-4850 all-in-one printer for the small office balances a high initial price with a low cost per page, for considerable savings if you print enough. The Epson EcoTank ET-4850 is an all-in-one inkjet printer. It has refillable ink tanks instead of ink cartridges and uses Epson T502 ink. It ...