Portion of an ink tank

FIG. 1 is a top perspective view of a portion of an ink tank according to a first embodiment of the invention;

FIG. 2 is an enlarged top perspective view of a portion of FIG. 1;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a bottom perspective view thereof also showing a left side view thereof;

FIG. 6 is a left-side view of FIG. 1;

FIG. 7 is a front view thereof;

FIG. 8 is a bottom perspective view of a second embodiment;

FIG. 9 is a top perspective view of a third embodiment;

FIG. 10 is a top view thereof;

FIG. 11 is a bottom plan view thereof;

FIG. 12 is a bottom perspective view thereof;

FIG. 13 is an enlarged bottom perspective view thereof;

FIG. 14 is a front view thereof; and,

FIG. 15 is an enlarged top perspective view of a fourth embodiment.

The inside features of the portion of an ink tank have no ornamentality. In addition, the broken lines define the bounds of the claimed design but do not form part of the claimed design.