The file of this patent contains at least one figure executed in color. Copies of this patent with color figures will be provided by the United States Patent and Trademark Office upon request and payment of the necessary fee.
Fig.
Fig.
Fig.
Fig.
The dash-dash broken lines and the part painted in dark gray form no part of the claimed design. The dot-dash broken lines show boundaries and form no part of the claimed design. The orange crescent-shaped area is translucent.