Developer supply container and developer supplying system

1. A developer supply container comprising:

a developer accommodating portion accommodating the developer;

a developer discharging portion in fluid communication with the developer accommodating portion, with the developer accommodating portion being rotatable about a rotational axis and relative to the developer discharging portion, and with the developer discharging portion being provided with a developer discharge opening at a bottommost side of the developer discharging portion and configured to permit discharging the developer to outside of the developer supply container; and

lifter linearly liftable relative to the developer discharging portion in a direction perpendicular to a horizontal plane that includes the rotational axis when the developer supply container is oriented with the developer discharge opening positioned at a bottom side of the developer discharging portion.

2. A developer supply container according to claim 1 , further comprising a moving mechanism configured to lift the lifter linearly relative to the developer discharging portion in the direction perpendicular to the horizontal plane.

3. A developer supply container according to claim 2 , wherein the lifter lifts linearly relative to the developer discharging portion in the direction perpendicular to the horizontal plane by the moving mechanism moving in a direction of the rotational axis.

4. A developer supply container according to claim 3 , wherein the moving mechanism includes a shutter configured to be slidable relative to the developer discharging portion in the direction of the rotational axis between an open position where the developer discharge opening is open and a closed position where the developer discharge opening is closed by the shutter, with the lifter linearly lifting relative to the developer discharging portion in the direction perpendicular to the horizontal plane as the shutter slides from the closed position toward the open position.

5. A developer supply container according to claim 2 , wherein the moving mechanism includes a first gear configured to be rotatable relative to the developer discharging portion, and a second gear provided on the lifter and configured to engage the first gear, with the lifter linearly lifting relative to the developer discharging portion in the direction perpendicular to the horizontal plane by rotation of the first gear and engagement of the first gear to the second gear.

6. A developer supply container according to claim 5 , further comprising a third gear configured to engage the first gear to thereby rotate the first gear.

7. A developer supply container according to claim 6 , wherein the first gear includes (i) a first gear portion configured to engage the second gear and (ii) a second gear portion configured to engage the third gear, with a diameter of the first gear portion being greater than a diameter of the second gear portion.

8. A developer supply container according to claim 7 , wherein the first gear portion and the second gear portion are supported by a projection provided on the developer discharging portion, with the first gear portion and the second gear portion being rotatable about the projection.

9. A developer supply container according to claim 6 , further comprising a shutter configured to be slidable relative to the developer discharging portion in a direction of the rotational axis between an open position where the developer discharge opening is open and a closed position where the developer discharge opening is closed by the shutter, with the shutter including the third gear.

10. A developer supply container according to claim 9 , wherein the lifter linearly lifts relative to the developer discharging portion by rotation of the first gear, which engages the second gear and the third gear, as the shutter slides from the closed position toward the open position.

11. A developer supply container according to claim 5 , wherein the first gear is supported by the developer discharging portion.

12. A developer supply container according to claim 5 , wherein, in a direction of the rotational axis, the first gear is positioned between a front-end portion of the developer discharging portion and the developer discharging opening.

13. A developer supply container according to claim 5 , wherein, in a direction of the rotational axis, the second gear is positioned between a front-end portion of the developer discharging portion and the developer discharging opening.

14. A developer supply container according to claim 1 , wherein the lifter is provided on the developer discharging portion.

15. A developer supply container according to claim 1 , wherein the lifter is linearly liftable relative to the developer discharging portion in the direction perpendicular to the horizontal plane between a first position and a second position, with the second position being above the first position when the developer supply container is oriented with the developer discharge opening positioned at a bottom side of the developer discharging portion, with the lifter including a receiving supporting portion, and

wherein, when the lifter is positioned at the second position, a part of the receiving support portion crosses a plane that is (i) perpendicular to the rotational axis and (ii) passes through the developer discharge opening.

16. A developer supply container according to claim 1 , wherein the lifter includes a receiving supporting portion, with the receiving support portion including a first upwardly facing surface and a second upwardly facing surface that is inclined relative to the horizontal plane when the developer supply container is oriented with the developer discharge opening positioned at a bottom side of the developer discharging portion, and

wherein, in a direction of the rotational axis, the first upwardly facing surface is positioned between the second upwardly facing surface and the developer accommodating portion.