The ornamental design for a supportdevice for a balloon sculpture, as shown and described.
FIG. 1 is a front perspective partial view of a support device for a balloon sculpture showing our new design;
FIG. 2 is a left side partial view of a support device for a balloon sculpture;
FIG. 3 is a right side partial view of a support device for a balloon sculpture;
FIG. 4 is a front partial view of a loop used in a support device for a balloon sculpture;
FIG. 5 is a back partial view of a loop used in a support device for a balloon sculpture;
FIG. 6 is a bottom partial view of a support device for a balloon sculpture;
FIG. 7 is a top partial view of a support device for a balloon sculpture;
FIG. 8 is a front view of a support device for a balloon sculpture as used in a balloon arch with helium-filled balloons;
FIG. 9 is a front view of a support device for a balloon sculpture as used in a balloon arch with air-filled balloons; and,
FIG. 10 is a front view of a support device for a balloon sculpture as used in a balloon column with helium-filled balloons.
Right side views not shown are mirror images of left side views. Any broken lines illustrative of environmental structure in the drawings are not part of the design sought to be patented. The support device for a balloon sculpture is shown with a symbolic break in its length. The appearance of any portion of the article between the break lines forms no part of the claimed design.