The drive system for a mailing flat bed postage printing apparatus includes a postage meter cartridge having an indicia plate mounted in the base of the printing apparatus. An inking system is included for inking the indicia plate. The inking system includes a drive motor mounted to the base in driving communication with a first shaft rotatively mounted in the base. A cam is mounted to the first shaft having a cam surfaces. An ink tray is positionable by a linkage system wherein the linkage system includes cam followers in communication with the cam surface to position the ink tray in response to the rotational position of the cam. A platen is reciprocally positionable between a first and print position in the base. The cam is rotated in a first range wherein the cam surface positions the linkage system and a second range of rotation wherein the linkage system is in a dwell mode. An intermediate gear system is provided for positioning the platen between the first and print position only when the cam is rotated in the second range.