The ornamental design for a labelprinter, as shown and described.
FIG. 1 is a front, top and right side perspective view of a label printer showing our new design;
FIG. 2 is a rear, bottom and left side perspective view thereof;
FIG. 3 is a front elevation view thereof;
FIG. 4 is a rear elevation view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is a right side elevation view thereof; and,
FIG. 8 is a left side elevation view thereof.
The broken lines immediately adjacent to the shaded areas, encompassing unshaded regions, represent the bounds of the claim, while all other broken lines are directed to environment and are for illustrative purposes only; the broken lines form no part of the claimed design.