Patent ID: 7780288

Claim:
A mobile telecommunications device comprising: a cradle defining a print media feed path, the cradle having a piezo-electric element and an arm, the arm extending from the cradle and supports the piezo-electric element; a replaceable printhead cartridge receivable within the cradle adjacent the print media feed path, the replaceable printhead cartridge including: a printhead for printing on a media substrate; a drive shaft for feeding the media substrate past the printhead; a drive wheel operably connected to the drive shaft, the drive wheel being located adjacent the arm of the cradle when the printhead cartridge is received within the cradle, wherein actuation of the piezo-electric element causes an oscillating movement of the arm to contact the drive wheel upon each oscillation to thereby cause rotational movement of the drive wheel; and an ink reservoir for supplying ink to the printhead; and a print engine controller for operatively controlling the printhead.