Bar code printers; Computer printers for printing documents; Entertainment system comprising a computer, multiple image display screen, multiple input devices and a printer; Image fuser units for computer printers comprising electro-mechanical rollers for the purpose of transferring toner onto paper; Impact printers; Ink cartridges, unfilled, for printers and photocopiers; Photo printers; Print heads for document printers and plotters; Thermal printers; Unfilled toner cartridges for printers