FIG. 1 is a perspective view showing our new design for a machine for cutting a window covering;

FIG. 2 is a front view showing our new design shown in FIG. 1;

FIG. 3 is a back view showing our new design shown in FIG. 1;

FIG. 4 is a top view showing our new design shown in FIG. 1;

FIG. 5 is a bottom view showing our new design shown in FIG. 1;

FIG. 6 is a left side view showing our new design shown in FIG. 1; and,

FIG. 7 is a right side view showing our new design shown in FIG. 1.

The portions shown in broken lines are not part of the claimed design but show the environment in which the design is associated.