The ornamental design for a frame of fan, as shown and described.
FIG. 1 is a front perspective view of a frame of fan showing our new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof;
FIG. 8 is another perspective view thereof; and,
FIG. 9 is a cross-sectional view of the frame of fan of FIG. 8, and taken along the line AA.
The broken lines shown in the drawings are for illustrative purposes only and depict unclaimed portions of the frame of fan that form no part of the claimed design.
The gray scales shown in the Figures represent the claimed portion of the design and not any particular color and surface pattern.