US Patent 7572004 Print engine with chassis ink channels between printhead and cartridge

A print engine includes a printhead assembly. The printhead assembly includes an ink ejection printhead. A chassis assembly includes a molding defining ink supply channels for supplying respective inks to the printhead. A print roll cartridge includes a core defining internal ink reservoirs and print media wound upon the core. The cartridge is configured to be releasably mounted to the chassis so that ink from the reservoirs is supplied to respective ink supply channels before being printed upon the print media.