Developer supply container and developer supplying system

1. A developer supply container comprising:

a developer accommodating body configured to contain developer;

a developer discharging body in fluid communication with the developer accommodating body, the developer discharging body having a discharge opening, the discharge opening being configured to form at least a part of a discharge passageway through which developer may be discharged to outside of the developer supply container, with an end of the discharge passageway being positioned at a bottommost side of the developer supply container, and with the developer accommodating body being rotatable about a rotational axis thereof relative to the developer discharging body; and

a track provided at each of opposite sides of the developer discharging body, each track being positioned (i) below a horizontal plane that includes the rotational axis and (ii) divides the developer supply container into a lower section that includes the discharge opening and an upper section, a surface of each track extending from a first position to a second position, with the second position being closer to the horizontal plane than the first position is to the horizontal plane, and with the surface facing upward, and each track extending such that a plane perpendicular to the rotational axis and passing through the track passes through the end of the discharge passageway when the discharge passageway through which developer is discharged to outside of the developer supply container is formed.

2. The developer supply container according to claim 1 , wherein the developer accommodating body is provided with a gear portion provided about the rotational axis.

3. The developer supply container according to claim 1 , wherein each track extends along a straight line.

4. The developer supply container according to claim 1 , wherein each track extends along an arcuate line.

5. The developer supply container according to claim 1 , wherein each track extends stepwise.

6. The developer supply container according to claim 1 , further comprising a shutter movable relative to the developer discharging body between an open position wherein the discharge opening is open and a closed position wherein the discharge opening is closed by the shutter.

7. The developer supply container according to claim 6 , wherein the developer discharging body is provided with a shutter support movably supporting the shutter, and

wherein each track is integrally molded with the shutter support.

8. The developer supply container according to claim 1 , further comprising a shutter including an opening, with the opening in the shutter being configured to form a part of the discharge passageway, and with the shutter being movable relative to the discharging body between (i) an open position wherein the opening in the shutter is aligned with the discharge opening to form the discharge passageway, and (ii) a closed position wherein the opening in the shutter is not aligned with the discharge opening to thereby close the discharge opening.

9. The developer supply container according to claim 1 , further comprising a pump configured and positioned to force developer out of the developer discharging body through the discharge opening.

10. The developer supply container according to claim 1 , wherein the discharge opening has an area of 0.002 mm 2 to 12.6 mm 2 .

11. A developer supply container comprising:

a developer accommodating body;

developer contained in the developer accommodating body;

a developer discharging body in fluid communication with the developer accommodating body, the developer discharging body having a discharge opening, the discharge opening being configured to form at least a part of a discharge passageway through which developer may be discharged to outside of the developer supply container, with an end of the discharge passageway being positioned at a bottommost side of the developer supply container, and with the developer accommodating body being rotatable about a rotational axis thereof relative to the developer discharging body; and

a track provided at each of opposite sides of the developer discharging body, each track being positioned (i) below a horizontal plane that includes the rotational axis and (ii) divides the developer supply container into a lower section that includes the discharge opening and an upper section, a surface of each track extending from a first position to a second position, with the second position being closer to the horizontal plane than the first position is to the horizontal plane, and with the surface facing upward, and each track extending such that a plane perpendicular to the rotational axis and passing through the track passes through the end of the discharge passageway when the discharge passageway through which developer is discharged to outside of the developer supply container is formed.

12. The developer supply container according to claim 11 , wherein the developer accommodating body is provided with a gear portion provided about the rotational axis.

13. The developer supply container according to claim 11 , wherein each track extends along a straight line.

14. The developer supply container according to claim 11 , wherein each track extends along an arcuate line.

15. The developer supply container according to claim 11 , wherein each track extends stepwise.

16. The developer supply container according to claim 11 , further comprising a shutter movable relative to the developer discharging body between an open position wherein the discharge opening is open and a closed position wherein the discharge opening is closed by the shutter.

17. The developer supply container according to claim 16 , wherein the developer discharging body is provided with a shutter support movably supporting the shutter, and

wherein each track is integrally molded with the shutter support.

18. The developer supply container according to claim 11 , further comprising a shutter including an opening, with the opening in the shutter being configured to form a part of the discharge passageway, and with the shutter being movable relative to the discharging body between (i) an open position wherein the opening in the shutter is aligned with the discharge opening to form the discharge passageway, and (ii) a closed position wherein the opening in the shutter is not aligned with the discharge opening to thereby close the discharge opening.

19. The developer supply container according to claim 11 , further comprising a pump configured and positioned to force developer out of the developer discharging body through the discharge opening.

20. The developer supply container according to claim 11 , wherein the developer has a fluidity energy of not less than 4.3×10 −4 kg·m 2 /s 2 and not more than 4.14×10 −3 kg·m 2 /s 2 .

21. The developer supply container according to claim 11 , wherein the discharge opening has an area of 0.002 mm 2 to 12.6 mm 2 .