The ornamental design for a labelprinter, as shown and described.
FIG. 1 is a front perspective view of the present invention.
FIG. 2 is a front elevation view of FIG. 1.
FIG. 3 is a rear elevation view of FIG. 1.
FIG. 4 is a top plan view of FIG. 1.
FIG. 5 is a bottom plan view of FIG. 1.
FIG. 6 is a right side elevation view of FIG. 1; and,
FIG. 7 is a left side elevation view of FIG. 1.
The broken line portion of the figure drawings is included to show environment that forms no part of the claimed design. The dash-dot lines depict the boundaries of the claim and form no part of the claimed design.