Print engine including transfer roller

A print engine for a printer, the print engine including:a page width printhead;a transfer roller arranged adjacent the printhead for transferring ink deposited on its surface by the printhead to a surface of a sheet of print media on which an image is to be printed, the roller having a passage defined therein; anda drive means for rotatably driving the transfer roller and feeding the print media past the transfer roller, the drive means being arranged in the passage of the transfer roller.