The ornamental design for a supporthead, as shown and described.
In a preferred embodiment the nature of this product is as a holder unit, useful in connection with a cleaning device such as a hand-held window cleaning device having a squeegee blade, for delivering and collecting cleaning fluid.
FIG. 1 is a rear perspective view of a support head embodying our new design;
FIG. 2 is a left side elevational view thereof, the right side elevational view being a mirror image thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a top plan view thereof, the bottom plan view being essentially a mirror image thereof;
FIG. 5 is a front elevational view thereof; and,
FIG. 6 is a frontal perspective view thereof.
The broken line representations of various structures in FIGS. 1, 3, 5 and 6 are for purposes of illustration only and form no part of the claimed design.