The ornamental design for a curl-up device, as shown and described.
FIG. 1 is a perspective view of a first embodiment of a curl-up device;
FIG. 2 is a rear view of the curl-up device of FIG. 1;
FIG. 3 is a front view of the curl-up device of FIG. 1;
FIG. 4 is a first side view of the curl-up device of FIG. 1;
FIG. 5 is a second side view of the curl-up device of FIG. 1;
FIG. 6 is a top view of the curl-up device of FIG. 1;
FIG. 7 is a bottom view of the curl-up device of FIG. 1;
FIG. 8 is a perspective view of a second embodiment of a curl-up device;
FIG. 9 is a rear view of the curl-up device of FIG. 8;
FIG. 10 is a front view of the curl-up device of FIG. 8;
FIG. 11 is a first side view of the curl-up device of FIG. 8;
FIG. 12 is a second side view of the curl-up device of FIG. 8;
FIG. 13 is a top view of the curl-up device of FIG. 8; and,
FIG. 14 is a bottom view of the curl-up device of FIG. 8.
The claim comprises only the shaded surfaces of the curl-up device; the unshaded surfaces and the broken line showing of portions of the curl-up device depict environment and forms no part of the claimed design.