Developer supply container and developer supplying system
A developer supply container includes a developer accommodating portion for accommodating a developer, a discharge opening for permitting discharging of the developer from the developer accommodating portion, a drive receiving portion for receiving a driving force, and a pump portion capable of being driven by the driving force received by the drive receiving portion to alternate an internal pressure of the developer accommodating portion between a pressure lower than an ambient pressure and a pressure higher than the ambient pressure by increasing and decreasing a volume of the pump portion. A position of the pump portion is set such that the pump portion starts with a stroke in which the volume increases in an initial action of the pump portion.
1. A developer supply container detachably mountable to an image forming apparatus, the developer supply container comprising:
a developer accommodating portion configured to accommodate a developer;
a discharge opening configured to permit discharging of the developer from said developer accommodating portion;
a drive receiving portion configured to receive a driving force; and
a pump portion capable of being driven by the driving force received by said drive receiving portion to alternate an internal pressure of said developer accommodating portion between a pressure lower than an ambient pressure and a pressure higher than the ambient pressure by increasing and decreasing a volume of said pump portion,
wherein a position of said pump portion, before said developer supply container is mounted to the image forming apparatus, is set such that said pump portion starts with a stroke in which the volume increases in an initial action of said pump portion.
2. The developer supply container according to claim 1 , wherein with respect to a pressure difference when the internal pressure of said developer accommodating portion is lower than the ambient pressure, a maximum value P 1 of a pressure difference between the internal pressure of said developer accommodating portion and the ambient pressure when said pump portion is operated in a state that said developer accommodating portion is sealed, and a maximum value P 2 of a pressure difference therebetween during a developer supplying operation of said developer supply container satisfy |P 1 |>|P 2 |.
3. The developer supply container according to claim 1 , further comprising a feeding portion configured to feed the developer accommodated inside said developer accommodating portion toward said discharge opening by rotating by a rotational force received by said drive receiving portion, wherein said pump portion is driven using a rotation of said drive receiving portion.
4. The developer supply container according to claim 1 , further comprising a nozzle portion connected to said pump portion and having an opening at an end, wherein the opening of said nozzle portion is disposed adjacent to said discharge opening.
5. The developer supply container according to claim 4 , wherein said nozzle portion is provided with a plurality of openings.
6. A developer supplying system comprising a developer replenishing apparatus, and a developer supply container detachably mountable to said developer replenishing apparatus,
said developer replenishing apparatus including a driver configured to apply a driving force to said developer supply container, and
said developer supply container including a developer accommodating portion configured to accommodate a developer, a discharge opening configured to permit discharging of the developer from said developer accommodating portion, a drive receiving portion configured to receive the driving force, and a pump portion capable of being driven by the driving force received by said drive receiving portion to an internal pressure of said developer accommodating portion between a pressure higher than an ambient pressure and a pressure lower than the ambient pressure, wherein a position of said pump portion, before said developer supply container is mounted to said developer replenishing apparatus, is set such that said pump portion starts with a stroke in which the volume increases in an initial action of said pump portion.
7. The developer supplying system according to claim 6 , wherein with respect to a pressure difference when the internal pressure of said developer accommodating portion is lower than the ambient pressure, a maximum value P 1 of a pressure difference between the internal pressure of said developer accommodating portion and the ambient pressure when said pump portion is operated in a state that said developer accommodating portion is sealed, and a maximum value P 2 of a pressure difference therebetween during a developer supplying operation of said developer supply container satisfy |P 1 |>|P 2 |.
8. The developer supplying system according to claim 6 , further comprising a nozzle portion connected to said pump portion and having an opening at an end, wherein the opening of said nozzle portion is disposed adjacent to said discharge opening.
9. The developer supplying system according to claim 8 , wherein said nozzle portion is provided with a plurality of openings.
10. A developer supply container detachably mountable to an image forming apparatus, the developer supply container comprising:
a developer accommodating portion configured to accommodate developer;
a discharge opening configured to permit discharging of the developer from said developer accommodating portion;
a drive receiving portion configured to receive a driving force;
a pump portion capable of being driven by the driving force received by said drive receiving portion to alternate an internal pressure of said developer accommodating portion between a pressure lower than an ambient pressure and a pressure higher than the ambient pressure by increasing and decreasing a volume of said pump portion; and
wherein a position of said pump portion before said developer supply container is mounted to the image forming apparatus is set so that said pump portion starts with a stroke in which air is taken into said developer accommodating portion through said discharge opening in an initial operational period of said pump portion.
11. The developer supply container according to claim 10 , wherein with respect to a pressure difference when the internal pressure of said developer accommodating portion is lower than the ambient pressure, a maximum value P 1 of a pressure difference between the internal pressure of said developer accommodating portion and the ambient pressure when said pump portion is operated in a state that said developer accommodating portion is sealed, and a maximum value P 2 of a pressure difference therebetween during a developer supplying operation of said developer supply container satisfy |P 1 |>|P 2 |.
12. The developer supply container according to claim 10 , further comprising a feeding portion configured to feed the developer accommodated inside said developer accommodating portion toward said discharge opening by rotating by a rotational force received by said drive receiving portion, wherein said pump portion is driven using a rotation of said drive receiving portion.
13. The developer supply container according to claim 10 , further comprising a nozzle portion connected to said pump portion and having an opening at an end, wherein the opening of said nozzle portion is disposed adjacent to said discharge opening.
14. The developer supply container according to claim 13 , wherein said nozzle portion is provided with a plurality of openings.
15. A developer supplying system comprising a developer replenishing apparatus, and a developer supply container detachably mountable to said developer replenishing apparatus,
said developer replenishing apparatus including a driver configured to apply a driving force to said developer supply container; and
said developer supply container including a developer accommodating portion configured to accommodate developer, a discharge opening configured to permit discharging of the developer from said developer accommodating portion, a drive receiving portion configured to receive the driving force, and a pump portion capable of being driven by the driving force received by said drive receiving portion to alternate an internal pressure of said developer accommodating portion between a pressure lower than an ambient pressure and a pressure higher than the ambient pressure by increasing and decreasing a volume of said pump portion, wherein a position of said pump portion before said developer supply container is mounted to the developer replenishing apparatus is set so that said pump portion starts with a stroke in which the air is taken into said developer accommodating portion through said discharge opening in an initial operational period of said pump portion.
16. The developer supplying system according to claim 15 , wherein with respect to a pressure difference when the internal pressure of said developer accommodating portion is lower than the ambient pressure, a maximum value P 1 of a pressure difference between an internal pressure of said developer accommodating portion and the ambient pressure when said pump portion is operated in a state that said developer accommodating portion is sealed, and a maximum value P 2 of a pressure difference therebetween during a developer supplying operation of said developer supply container satisfy |P 1 |>|P 2 |.
17. The developer supplying system according to claim 15 , further comprising a nozzle portion connected to said pump portion and having an opening at an end, wherein the opening of said nozzle portion is disposed adjacent to said discharge opening.
18. The developer supplying system according to claim 17 , wherein said nozzle portion is provided with a plurality of openings.