The ornamental design for a labelprinter, as shown and described.
FIG. 1 is a perspective view of a label printer;
FIG. 2 is a front view thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a right-side view thereof;
FIG. 5 is a left-side view thereof;
FIG. 6 is a rear view thereof;
FIG. 7 is a bottom view thereof; and,
FIG. 8 is a cross-sectional view taken in the direction of 8-8 of FIG. 2.
The broken lines with a lighter line thickness are directed to environment while the broken lines with a heavier line thickness and broken line directional arrows in the FIG. 2 view are for reference purpose only in order to identify the cross sectional view of FIG. 8; the broken lines form no part of the claimed design.