The ornamental design for a chipcover for tipdresser, as shown and described.
FIG. 1 is a perspective view of a chip cover for tip dresser in accordance with our new design;
FIG. 2 is a front side elevational view thereof;
FIG. 3 is a rear side 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; and,
FIG. 8 is an environmental perspective view illustrating usage of the chip cover of the present application in association with a tip dresser. The broken lines shown in the drawings are used to show environment that forms no part of the claimed design.