Plural mode modular reproduction apparatus

A plural mode modular reproduction apparatus for selective different sheet printing modes;

• said reproduction apparatus comprising a common base frame unit,
• said base frame unit having a sheet feeding unit, a microprocessor controller, and at least one pair of integral horizontal module mounting guide rails,
• said horizontal integral module mounting guide rails providing a defined dimension simple manual horizontal module mounting entrance into said base frame unit for operative module mounting within said base frame unit,
• a xerographic engine module with xerographic engine mounting elements which dimensionally mate with said module mounting guide rails in said base frame unit to slidably removably operatively mount said xerographic engine into said base frame unit for a xerographic said sheet printing mode,
• and an ink jet printing engine module with mounting elements which dimensionally correspond with said xerographic engine mounting elements and dimensionally mate with the same said module mounting guide rails in said base frame unit as said xerographic engine module, to slidably operatively mount said ink jet printing engine module into said base frame unit on said same horizontal mounting guide rails in said same base frame unit when said xerographic engine module is removed from said base frame unit, in place of said xerographic engine module, for an ink jet said sheet printing mode by said ink jet printing engine module,
• said xerographic engine module and said ink jet printing engine module thereby being readily manually interchangeable in said base frame unit to provide a choice between said xerographic sheet printing mode or said ink jet sheet printing utilizing the same base frame unit;
• wherein a detent system holds said xerographic engine module or said ink jet printing engine module operatively within said base frame unit;
• wherein said xerographic engine module and said ink jet printing engine module have electrical connectors which electrically mate with said microprocessor controller upon said respective mounting thereof into said base frame unit to differently program said microprocessor controller for the respective said module;
• and wherein said xerographic engine module is removable in plural submodules from said base frame unit on plural said integral module mounting guide rails, and wherein one of said xerographic engine plural submodules is a fuser module.