Toner cartridge, image forming apparatus, and remanufacturing method of used toner cartridge

A toner cartridge for supplying toner to an outside, comprising:

• a frame including a toner accommodating chamber configured to accommodate the toner and provided with a discharge opening through which the toner accommodated in the toner accommodating chamber is capable of being discharged;
• an elastic seal provided with a through hole and disposed on an outer surface of the frame so that the through hole communicates with the discharge opening;
• a pump communicating with the toner accommodating chamber and configured to discharge the toner, accommodated in the toner accommodating chamber, through the discharge opening;
• a sealing member capable of taking a sealing state in which the toner discharged through the through hole of the elastic seal is sealed and a discharging state in which the toner discharged through the through hole is discharged through the discharge opening;
• and
• a nipping member provided with an opening through which the toner passed through the discharge opening and the through hole is discharged to the outside of the toner cartridge,
• wherein the nipping member nips the sealing member at a predetermined nipping pressure in cooperation with the elastic seal.