Printer ribbon cartridge with means for transversely displacing ribbon during advance

An ink ribbon cartridge comprising a case, a storage reel for an ink ribbon, a take-up reel for the ink ribbon, means for longitudinally advancing the ink ribbon from the storage reel to the take-up reel, and means supported by the cartridge for transversely displacing the ribbon during its longitudinal advance including a freely rotatable and axially movable first shaft means supported by said case, a first roller fixed to said first shaft means, freely rotatable and axially movable second shaft means supported by said case, a second roller fixed to said second shaft means, coupling means coupling said first and second shaft means for causing said second shaft means to follow the longitudinal movement of said first shaft means, said ribbon passing on said first roller to rotate said first roller during longitudinal advance of the ribbon, said first roller having an end cam surface, the case having a corresponding cam surface facing and engaging the cam surface on the first roller, said cam surfaces respectively including a plurality of peaks and an inclined surface between successive peaks to produce a saw-tooth path of travel of the ribbons as the ribbon advances.