The ornamental design for a potatoslicingrack, as shown and described.
FIG. 1 is an upper left front perspective view of a potato slicing rack showing my new design;
FIG. 2 is another upper left front perspective view thereof showing an alternate position of the cutting guide of the potato slicing rack on the base of the potato slicing rack;
FIG. 3 is a front elevational view thereof, the rear elevational view being a mirror image;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a sectional view of thereof taken along line 6-6 in FIG. 5;
FIG. 7 is a top plan view thereof; and,
FIG. 8 is a bottom plan view thereof.
The broken lines in FIGS. 1, 2, 6 and 7 showing potato anchoring pins on the base of the potato slicing rack form no part of the claimed design. The broken lines in FIG. 8 represent the boundary of the claimed design; the area within this boundary forms no part of the claimed design.