The ornamental design for a supportframe for bags with handles, as shown and described.
FIG. 1 is a top, front and left side perspective view of a support frame
for bags with handles showing my new design, the broken lines shown for
illustrative purposes only and form no part of the claimed design;
FIG. 2 is a front elevational view thereof, the rear elevation being a
mirror image thereof;
FIG. 3 is a left side elevational view thereof, the right side being a
mirror image thereof;