Powder container, powder supply assembly, and image forming apparatus in which a powder outlet faces in an opposite direction as an opening of a container body

1. A powder container, removably installable horizontally in an apparatus, the powder container comprising:

a powder containing compartment for containing a powder, having a powder outlet connectable to a powder inlet of a horizontally extending tube of the apparatus in conjunction with installation of the powder container in the apparatus, the powder outlet from which the powder contained in the powder containing compartment is discharged to the tube through the powder inlet thereof;

a tube inlet for receiving the tube of the apparatus;

a removably insertable plug member to open and close the powder outlet of the powder containing compartment in conjunction with installation of the powder container in the apparatus; and

at least one discrimination protrusion projecting from an outer circumferential surface of the powder container and positioned such that a downstream end of the discrimination protrusion is disposed downstream from a downstream end of the powder outlet of the powder containing compartment in an installation direction in which the powder container is installed in the apparatus,

at least one of shape, arrangement, and quantity of the discrimination protrusion being unique to the type of powder contained in the powder container,

the powder container further comprising:

a horizontally extending tube connection compartment into which the tube of the apparatus is inserted horizontally after passing through the tube inlet, and in which the plug member is contained, the tube connection compartment communicating with the powder outlet of the powder containing compartment,

wherein the plug member prevents discharge of the powder from the powder container when the plug member is in a closed position,

wherein the powder containing compartment comprises:

a container body having an opening in an upstream end portion thereof, the opening facing in the installation direction of the powder container; and

a cap to cover the opening of the container body,

wherein the powder outlet and the tube connection compartment are formed in the cap, and

wherein the tube inlet faces in an opposite direction as the opening of the container body.

2. The powder container according to claim 1 , further comprising an electronic data storage unit for storing data relating to the powder container, communicably connected to a communication circuit of the apparatus,

wherein the electronic data storage unit is positioned opposite the tube connection compartment relative to a long axis of the cap.

3. The powder container according to claim 1 , further comprising a rotatable powder conveyance member inside the container body for conveying the powder through the container body to the opening thereof.

4. The powder container according to claim 1 , wherein the cap is retained stationary in the apparatus at a fixed position relative to the apparatus upon installation of the powder container in the apparatus, and

the container body rotatively engages the cap.

5. The powder container according to claim 4 , wherein the container body comprises a spiral protrusion protruding inward from an inner circumferential surface of the container body that conveys the powder contained in the container body therealong to the opening of the container body as the container body rotates.

6. The powder container according to claim 1 , further comprising a rotatable powder conveyance member inside the powder containing compartment for conveying the powder through the powder containing compartment to the powder outlet thereof.

7. The powder container according to claim 1 , further comprising an electronic data storage unit for storing data relating to the powder container, communicably connected to a communication circuit of the apparatus,

wherein the electronic data storage unit is positioned opposite the powder outlet relative to a long axis of the powder containing compartment.

8. The powder container according to claim 1 , incorporated in an image forming apparatus.

9. The powder container according to claim 1 , wherein:

the plug member prevents discharge of the powder from the powder container when the plug member is in a closed position, opens and closes the powder outlet of the powder containing compartment by moving horizontally relative to the apparatus inside the tube connection compartment in conjunction with installation of the powder container in the apparatus.

10. A powder container, removably installable horizontally in an apparatus, the powder container comprising:

a powder containing compartment for containing a powder, having a powder outlet connectable to a powder inlet of a horizontally extending tube of the apparatus in conjunction with installation of the powder container in the apparatus, the powder outlet from which the powder contained in the powder containing compartment is discharged to the tube through the powder inlet thereof;

a tube inlet for receiving the tube of the apparatus; and

a horizontally extending tube connection compartment into which the tube of the apparatus is inserted horizontally after passing through the tube inlet, the tube connection compartment communicating with the powder outlet of the powder containing compartment,

wherein the powder containing compartment includes a conveying member to transport powder in the powder containing compartment in a direction opposite an installation direction in which the powder container is installed in the apparatus, and

wherein the tube inlet faces the direction in which the conveying member transports powder inside the powder containing compartment.

11. The powder container according to claim 10 , further comprising:

a removably insertable plug to open and close the powder outlet of the powder containing compartment in conjunction with installation of the powder container in the apparatus.

12. The powder container according to claim 11 , wherein:

the horizontally extending tube connection compartment contains the plug.

13. The powder container according to claim 11 , wherein:

wherein the plug prevents discharge of the powder from the powder container when the plug is in a closed position.

14. The powder container according to claim 10 , wherein the powder containing compartment comprises:

a container body having an opening in an upstream end portion thereof, the opening facing in the installation direction of the powder container; and

a cap to cover the opening of the container body,

wherein the powder outlet and the tube connection compartment are formed in the cap.

15. The powder container according to claim 10 , further comprising:

at least one discrimination protrusion projecting from an outer circumferential surface of the powder container and positioned such that a downstream end of the discrimination protrusion is disposed downstream from a downstream end of the powder outlet of the powder containing compartment in an installation direction in which the powder container is installed in the apparatus,

at least one of shape, arrangement, and quantity of the discrimination protrusion being unique to the type of powder contained in the powder container.