We claim the ornamental design for a bumper for carts, as shown and described.
FIG. 1 is an upper perspective view showing our new design for a bumper for carts;
FIG. 2 is a top view showing the design of FIG. 1;
FIG. 3 is a bottom view showing the design of FIG. 1;
FIG. 4 is a side view showing the design of FIG. 1;
FIG. 5 is a partial perspective view showing the bumper for carts of FIG. 1 associated with a cart;
FIG. 6 is a perspective view showing the bumper for carts of FIG. 1 associated with a cart; and,
FIG. 7 is a magnified view of the bumper for carts of FIG. 6.
The evenly spaced broken lines in FIGS. 1 to 7 depict portions of the bumper for carts that form no part of the claimed design.
The dot-dash broken lines show boundaries, and do not form a part of the claimed design. In FIGS. 5 to 7, the evenly spaced broken lines illustrating environmental structure do not form a part of the claimed design.