Paint roller

FIG. 1 is a front view of my new and ornamental design for a paint roller, shown with tilted roller heads;

FIG. 2 is a left side view, shown with the roller heads in a vertical, non-tilted position;

FIG. 3 is a right side view, also shown with the roller heads in a vertical, non-tilted position; and,

FIG. 4 is a fragmentary, front perspective view of FIG. 2, with the roller heads being omitted for clarity of illustration only.

The rear, top, and bottom, of the article neither shown in the drawing nor described in the specification form no part of the claimed design.