Typewriter cartridge and feed mechanism therefor

A typewriter cartridge and drive mechanism therefor, said cartridge comprising a case having a body portion and having integral spaced apart guide members projecting therefrom for positioning a preselected portion of a typewriter ribbon in a plane at a predetermined location and distance from said body portion;

• a first spool mounted for rotation within said body portion, having a fixed axis of rotation and for holding a supply of typewriter ribbon, and a second spool spaced from said first spool for receiving said ribbon;
• said second spool having an axis which is mounted for motion in a predetermined path within said body portion;
• means defining an opening along the perimeter of said case and in said path;
• and means to bias said second spool in said path towards and into said opening and against at least a portion of said means defining said opening;
• said drive mechanism comprising a ribbon advancing means operatively associated with said opening for providing engagement against said ribbon on said second spool and for moving said second spool away from said means defining said opening;
• means on said cartridge defining a pivot for said cartridge along an axis thereof essentially parallel to said plane, said cartridge being movable between a first home position and a second elevated position about said axis;
• first and second cam means, said first cam means operable cyclically to elevate said cartridge from said home position to one of a plurality of print positions, and then to bring said cartridge back to its home position;
• said second cam means including said ribbon advancing means for effecting advancement of said ribbon upon said cartridge being elevated about said pivot.