a refillable ink ribbon cartridge for use in an electronic typewriter which includes a housing , a feed spool member having symmetric c - shaped springs for slidably receiving and removing a changeable feed spool , a winding spool member having a lever and a lever opener for slidably inserting and removing a winding spool , and a jagged wheel whereby the used ink ribbon cartridge can be reused and maintains a constant tension on the ink ribbon between the feed and winding spools .