The ornamental design for a pencilsharpener, as shown and described.
FIG. 1 is a perspective view of the pencil sharpener showing our new design;
FIG. 2 is a rear view of the pencil sharpener of FIG. 1;
FIG. 3 is a front view of the pencil sharpener of FIG. 1;
FIG. 4 is a right side view of the pencil sharpener of FIG. 1;
FIG. 5 is a left side view of the pencil sharpener of FIG. 1;
FIG. 6 is a top view of the pencil sharpener of FIG. 1; and,
FIG. 7 is a bottom view of the pencil sharpener of FIG. 1.
The broken line showing of screw-like circular motifs in FIG. 7 is illustrative of environmental structure only and forms no part of the claimed design.