Toner cartridge, process cartridge, and method of making toner cartridge reusable

A toner cartridge comprising:

• a fresh toner storing chamber in which fresh toner is stored, the fresh toner being used for developing an image, the fresh toner storing chamber having a fresh toner filling opening through which the fresh toner is filled therein;
• and
• a residual toner collection chamber in which residual toner is collected, the residual toner being a toner removed after an image is developed by using the fresh toner, the residual toner collection chamber having a residual toner conveying opening through which the residual toner is conveyed thereto and two residual toner discharging openings through which the residual toner can be discharged therefrom, the fresh toner storing chamber and the residual toner collection chamber being arranged integrally.