Provided is a printer assembly having a media housing unit having a number of ink reservoirs internally defined by a core portion around which print media is rolled. Also included is an ink supply and printhead unit attached to the media housing unit, said printhead unit having a guillotine blade assembly to cut the print media. The printer assembly also includes a drive unit having a platen configured to extract the print media from the media housing unit and feed it past the printhead unit, said drive unit having ink transmission channels interposed between the ink reservoirs and the ink supply and printhead unit to feed ink from the ink reservoirs to the ink supply and printhead unit. Further included is a controller for controlling operation of the printhead and drive units, said controller configured to maintain said printhead at an equilibrium temperature during printing.