The ornamental design for a printingtowersystem, as shown and described herein.
FIG. 1 illustrates a front, right, perspective view of a printing tower system, of the invention.
FIG. 2 illustrates a front view of the printing tower system shown in FIG. 1.
FIG. 3 illustrates a rear view of the printing tower system shown in FIG. 1.
FIG. 4 illustrates a left side view of the printing tower system shown in FIG. 1.
FIG. 5 illustrates a right side view of the printing tower system shown in FIG. 1.
FIG. 6 illustrates a top view of the printing tower system shown in FIG. 1; and,
FIG. 7 illustrates a bottom view of the printing tower system shown in FIG. 1.
The ornamental design that is claimed is shown in solid lines in the drawings. The broken lines shown in the drawings represent portions of the printer tower system that form no part of the claimed design.