Developer supply container and developer supplying system having pump operated developer discharge

1. A developer supply container detachably mountable to a developer replenishing apparatus, said developer supply container comprising:

a developer accommodating portion configured to accommodate a developer;

an opening configured and positioned to permit passing of the developer out of said developer accommodating portion;

a driving force receiving portion configured and positioned to receive a driving force from the developer replenishing apparatus; and

a pump portion configured and positioned to act upon said developer accommodating portion by the driving force received by said driving force receiving portion to alternately change an internal pressure of said developer accommodating portion between a pressure lower than an ambient pressure in a suction operation and a pressure higher than the ambient pressure in a discharge operation to supply the developer out of said developer accommodating portion.

2. A developer supply container according to claim 1 , wherein the developer in said developer supply container 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 , and

wherein said opening has an area not more than 12.6 mm 2 .

3. A developer supply container according to claim 1 , wherein said pump portion includes a displacement type pump having a volume changing with reciprocation.

4. A developer supply container according to claim 3 , wherein with increase of a volume of a chamber of said pump portion, the internal pressure in said developer accommodating portion becomes lower than the ambient pressure.

5. A developer supply container according to claim 3 , wherein said displacement type pump is a flexible bellow-like pump.

6. A developer supply container according to claim 3 , wherein said driving force receiving portion is capable of receiving a rotational force as the driving force, and

wherein said developer supply container further comprises:

a feeding portion configured and positioned to feed the developer in said developer accommodating portion toward said opening by the rotational force received by said driving force receiving portion, and

a drive converting portion configured and positioned to convert the rotational force received by said driving force receiving portion to a force for operating said pump portion.

7. A developer supplying system comprising:

a developer replenishing apparatus; and

a developer supply container detachably mountable to said developer replenishing apparatus,

wherein said developer replenishing apparatus includes:

a mounting portion configured and positioned to detachably mount said developer supply container,

a developer receiving portion configured and positioned to receive a developer from said developer supply container, and

a driver configured and positioned to apply a driving force to said developer supply container, and

wherein said developer supply container includes:

a developer accommodating portion configured to accommodate the developer,

an opening configured and positioned to permit passing of the developer out of said developer accommodating portion toward said developer receiving portion,

a driving force receiving portion, engageable with said driver, configured and positioned to receive the driving force from the driver, and

a pump portion configured and positioned to act on said developer accommodating chamber to alternately change an internal pressure of said developer accommodating portion between a pressure higher than an ambient pressure and a pressure lower than the ambient pressure to supply the developer out of said developer supply container.

8. A system according to claim 7 , wherein the developer in said developer supply container 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 , and

wherein said opening has an area not more than 12.6 mm 2 .

9. A system according to claim 7 , wherein said pump portion includes a displacement type pump having a volume changing with reciprocation.

10. A system according to claim 9 , wherein with increase of a volume of a chamber of said pump portion, the internal pressure in said developer accommodating portion becomes lower than the ambient pressure.

11. A system according to claim 9 , wherein said displacement type pump is a flexible bellow-like pump.

12. A system according to claim 9 , wherein said driver applies a rotational force as the driving force to said driving force receiving portion, and

wherein said developer supply container includes:

a feeding portion configured and positioned to feed the developer in said developer accommodating portion toward said opening by the rotational force received by said driving force receiving portion, and

a drive converting portion configured and positioned to convert the rotational force received by said driving force receiving portion to a force for operating said pump portion.

13. A developer supply container detachably mountable to a developer replenishing apparatus, said developer supply container comprising:

a developer accommodating portion configured to accommodate a developer;

an opening configured and positioned to permit passing of the developer out of said developer accommodating portion;

a driving force receiving portion configured and positioned to receive a driving force from the developer replenishing apparatus; and

a pump portion configured and positioned to act upon said developer accommodating chamber by the driving force received by said driving force receiving portion to alternately repeat suction and delivery actions through said opening to supply the developer out of said developer supply container.

14. A developer supply container according to claim 13 , wherein the developer in said developer supply container 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 , and

wherein said opening has an area not more than 12.6 mm 2 .

15. A developer supply container according to claim 13 , wherein said pump portion includes a displacement type pump having a volume changing with reciprocation.

16. A developer supply container according to claim 15 , wherein with increase of a volume of a chamber of said pump portion, the internal pressure in said developer accommodating portion becomes lower than an ambient pressure.

17. A developer supply container according to claim 15 , wherein said displacement type pump is a flexible bellow-like pump.

18. A developer supply container according to claim 15 , wherein said driving force receiving portion is capable of receiving a rotational force as the driving force, and

wherein said developer supply container further comprises:

a feeding portion configured and positioned to feed the developer in said developer accommodating portion toward said opening by the rotational force received by said driving force receiving portion, and

a drive converting portion configured and positioned to convert the rotational force by said driving force receiving portion to a force for operating said pump portion.

19. A developer supplying system comprising:

a developer replenishing apparatus; and

a developer supply container detachably mountable to said developer replenishing apparatus,

wherein said developer replenishing apparatus includes:

a mounting portion configured and positioned to detachably mount said developer supply container,

a developer receiving portion configured and positioned to receive a developer from said developer supply container, and

a driver configured and positioned to apply a driving force to said developer supply container, and

wherein said developer supply container includes:

a developer accommodating portion configured to accommodate the developer,

an opening configured and positioned to permit passing of the developer from said developer accommodating portion toward said developer receiving portion,

a driving force receiving portion configured and positioned to receive the driving force, and

a pump portion configured and positioned to act upon said developer accommodating portion to alternately repeat suction and delivery actions through said opening to supply the developer out of said developer supply container.

20. A system according to claim 19 , wherein the developer in said developer supply container 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 , and

wherein said opening has an area not more than 12.6 mm 2 .

21. A system according to claim 19 , wherein said pump portion includes a displacement type pump having a volume changing with reciprocation.

22. A system according to claim 21 , wherein with increase of a volume of a chamber of said pump portion, the internal pressure in said developer accommodating portion becomes lower than an ambient pressure.

23. A system according to claim 21 , wherein said displacement type pump is a flexible bellow-like pump.

24. A system according to claim 21 , wherein said driver applies a rotational force as the driving force to said driving force receiving portion, and

wherein said developer supply container includes:

a feeding portion configured and positioned to feed the developer in said developer accommodating portion toward said opening by the rotational force received by said driving force receiving portion, and

a drive converting portion configured and positioned to convert the rotational force received by said driving force receiving portion to a force for operating said pump portion.

25. A developer supply container according to claim 1 , wherein said pump portion includes a displacement type pump having a volume changing with reciprocation, and

wherein said driving force receiving portion is capable of receiving a rotational force as the driving force.

26. A developer supply container according to claim 1 , wherein said opening has an area not more than 12.6 mm 2 .

27. A system according to claim 7 , wherein said opening has an area not more than 12.6 mm 2 .

28. A developer supply container according to claim 13 , wherein said opening has an area not more than 12.6 mm 2 .

29. A system according to claim 19 , wherein said opening has an area not more than 12.6 mm 2 .

30. A developer supply container according to claim 1 , further comprising a nozzle portion connected to said pump portion and having a nozzle opening at a free end thereof, said nozzle opening being adjacent to said opening.

31. A developer supply container according to claim 30 , wherein said nozzle portion is provided with a plurality of such openings around a free end side thereof.

32. A system according to claim 7 , further comprising a nozzle portion connected to said pump portion and having a nozzle opening at a free end thereof, said nozzle opening being adjacent to said opening.

33. A system according to claim 32 , wherein said nozzle portion is provided with a plurality of such openings around a free end side thereof.

34. A developer supply container according to claim 13 , further comprising a nozzle portion connected to said pump portion and having a nozzle opening at a free end thereof, said nozzle opening being adjacent to said opening.

35. A developer supply container according to claim 34 , wherein said nozzle portion is provided with a plurality of such openings around a free end side thereof.

36. A system according to claim 19 , further comprising a nozzle portion connected to said pump portion and having a nozzle opening at a free end thereof, said nozzle opening being adjacent to said opening.

37. A system according to claim 36 , wherein said nozzle portion is provided with a plurality of such openings around a free end side thereof.

38. A developer supply container according to claim 1 , wherein said pump portion acts to alternate between the suction operation to unclog the opening and the discharge operation to discharge the developer from the developer accommodating portion.