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An ink tank comprises a housing that defines a container for ink that is substantially free from a negative pressure producing material. In various embodiments, a non-porous capillary member is disposed in the container. The capillary member may be formed by part of the housing, for example, by a ch

An ink tank comprises a housing that defines a container for ink that is substantially free from a negative pressure producing material. In various embodiments, a non-porous capillary member is disposed in the container. The capillary member may be formed by part of the housing, for example, by a channel formed in a side wall of the housing. Alternatively, the capillary member may be a capillary tube. A wick may be situated at an outlet formed in the housing and may be held there by a retaining member, for example, a rib that extends from the housing. The housing may include a cover that allows the container to vent to atmosphere. The cover may include a vent hole that communicates with the container via a tortuous path. Part of the cover may comprise an air permeable material. The housing may also define a spillover area outside of the container.

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1. An ink tank, comprising:a housing that defines a container for ink; and a non-porous capillary member at least partially defined by a side wall of the housing; and a wick situated at an ink outlet formed in the housing, wherein the wick and the non-porous capillary member together produce a negat

1. An ink tank, comprising:a housing that defines a container for ink; and a non-porous capillary member at least partially defined by a side wall of the housing; and a wick situated at an ink outlet formed in the housing, wherein the wick and the non-porous capillary member together produce a negative pressure. 2. The ink tank of claim 1, wherein the capillary member comprises a channel formed in the side wall of the housing.3. The ink tank of claim 1, wherein the capillary member is a capillary tube.4. The ink tank of claim 1, further comprising a retaining member that holds the wick at the outlet formed in the housing.5. The ink tank of claim 4, wherein the retaining member comprises a rib that extends from the housing.6. The ink tank of claim 1, wherein the capillary member has an equivalent inner diameter of 0.019 inches or less.7. The ink tank of claim 6, wherein the capillary member has an equivalent inner diameter of 0.014 inches or less.8. The ink tank of claim 1, wherein the container is substantially free from a negative pressure producing material.9. A method of making an ink tank, comprising:forming a housing that defines a container for ink; and forming a non-porous capillary member at least partially defined by a side wall of the housing forming an ink outlet in the housing; and forming a wick at the ink outlet, wherein the wick and the non-porous capillary member together produce a negative pressure. 10. The method of claim 9, wherein forming the capillary member comprises forming a capillary tube.11. The method of claim 9, wherein forming the capillary member comprises forming a channel in a side wall of the housing.12. The method of claim 9, wherein forming the housing comprises forming the outlet and the wick.13. The ink tank of claim 12, wherein the capillary member has an equivalent inner diameter of 0.019 inches or less.14. The ink tank of claim 12, wherein the capillary member has an equivalent inner diameter of 0.014 inches or less.15. The ink tank of claim 12, wherein the container is substantially free from a negative pressure producing material.16. The method of claim 9, further comprising selecting a material of the wick and an equivalent diameter of the capillary member to achieve a desired negative pressure.17. The method of claim 9, further comprising forming a retaining member that holds the wick at the outlet.18. The method of claim 17, wherein forming the housing comprises forming the retaining member.19. The ink tank of claim 9, wherein the container is substantially free from a negative pressure producing material.20. An ink tank, comprising:a housing that defines a container for ink; a non-porous capillary member that communicates with the container; and a wick situated at an ink outlet formed in the housing, wherein the wick and the non-porous capillary member together produce a negative pressure. 21. The ink tank of claim 20, further comprising a retaining member that holds the wick at the outlet formed in the housing.22. The ink tank of claim 21, wherein the retaining member comprises a rib that extends from the housing.23. The ink tank of claim 20, wherein the capillary member has an equivalent inner diameter of 0.019 inches or less.24. The ink tank of claim 20, wherein the capillary member has an equivalent inner diameter of 0.014 inches or less.25. The ink tank of claim 20, wherein the container is substantially free from a negative pressure producing material.26. A method of making an ink tank, comprising:forming a housing that defines a container for ink; forming a non-porous capillary member that communicates with the container; forming an outlet in the housing; and forming a wick at the ink outlet, wherein the wick and the non-porous capillary member together produce a negative pressure. 27. The method of claim 26, wherein forming the housing comprises forming the outlet and the wick.28. The method of claim 26, further comprising selecting a material of the wick and an equivalent diameter of the capillary member to achieve a desired negative pressure.29. The method of claim 26, further comprising forming a retaining member that holds the wick at the outlet.30. The method of claim 29, wherein forming the housing comprises forming the retaining member.