Build material container

1. A build material container for a three-dimensional printing system comprising:

an external casing; and

a plurality of reservoirs within the external casing, each reservoir having an outlet to supply build material stored therein and a separate inlet structure to allow at least one of build material and gas into the reservoir, wherein the outlet comprises a first opening in the reservoir and the inlet comprises a second, separate opening in the reservoir, the first and second openings separated from each other by a portion of the reservoir;

each of the plurality of reservoirs having a bottom portion with sloping sides angled toward a central longitudinal axis of the reservoir;

wherein the reservoirs each comprise an aspiration channel coupled to the outlet and extending along the central longitudinal axis of the reservoir.

2. The build material container of claim 1 , wherein each reservoir comprises a deformable structure and a surround, the aspiration channel being within the deformable structure, wherein a base of each surround comprises a vertex formed at an end of the aspiration channel, the base comprising at least one lower angled surface, and wherein the build material container comprises a support structure to accommodate the vertices, and to support the lower angled surfaces, of the plurality of surrounds.

3. The build material container of claim 1 , wherein the outlet structures are selectively sealable.

4. The build material container of claim 1 , wherein the plurality of reservoirs contain a common build material.

5. The build material container of claim 1 , wherein at least two of the plurality of reservoirs contain different build materials.

6. The build material container of claim 1 , wherein the plurality of reservoirs are arranged to form at least one of: a plurality of columns; and a plurality of rows within the external casing.

7. The build material container of claim 1 , wherein the reservoirs have common dimensions.

8. The build material container of claim 1 , wherein each reservoir comprises a polymer bag having a polyhedral base to accommodate an aspiration tube.

9. The build material container of claim 1 , wherein each reservoir comprises a deformable structure that is partially attached to an outer carton, each outer carton being accommodated within the external casing.

10. A method of making the build material container of claim 1 , the method comprising:

providing the plurality of build material reservoirs in a common housing of the external casing;

filling each of the build material reservoirs in the common housing with build material; and

sealing the deformable build material reservoirs.

11. The build material container of claim 1 , further comprising a support structure, comprising:

a plurality of polyhedral indentations in an upper portion of the support structure, each polyhedral indentation being configured to receive a base of one of the plurality of reservoirs, wherein a base of the support structure is arranged to rest on a planar surface.

12. The build material container of claim 11 , wherein the polyhedral indentations are regularly spaced in the upper portion.

13. The build material container of claim 11 , wherein the support structure is dimensioned to be accommodated within a base of a cuboid build material container.

14. The build material container of claim 1 , wherein the outlet of each reservoir is in a top portion of the reservoir opposite the bottom portion having the sloping sides.

15. The build material container of claim 1 , wherein the bottom portion has a conical or pyramidal shape.

16. The build material container of claim 1 , wherein the outlet of each reservoir comprises a nozzle extending along the central longitudinal axis of the reservoir.

17. A build material container for a three-dimensional printing system comprising:

an external casing; and

a plurality of reservoirs within the external casing, each reservoir having an aspiration channel therein that is coupled to an outlet to supply powdered build material stored in the reservoir and a separate inlet structure to allow at least one of build material and gas into the reservoir, wherein the outlet and inlet each comprise separate openings in the reservoir;

wherein each of the plurality of reservoirs has a bottom portion with sloping sides angled toward a central longitudinal axis of the reservoir to form a vertex at an end of the aspiration channel opposite the outlet.

18. The build material container of claim 17 , wherein the external casing further comprises a base with a support structure to accommodate the vertices of the plurality of reservoirs while supporting the reservoirs within the external casing.

19. A build material container for a three-dimensional printing system comprising:

an external casing; and

a plurality of reservoirs within the external casing, each reservoir having an aspiration channel therein that is coupled to an outlet to supply powdered build material stored in the reservoir and a separate inlet structure to allow at least one of build material and gas into the reservoir, wherein the outlet and inlet each comprise separate openings in the reservoir;

wherein each of the plurality of reservoirs has a bottom portion with sloping sides angled toward a central longitudinal axis of the reservoir to form a vertex at an end of the aspiration channel opposite the outlet; and

further comprising folded stiffening members on top surfaces of a plurality of reservoirs and underneath the external casing.