We claim the ornamental design for portable banner display, as shown and described.
FIG. 1 is a front perspective view of a portable banner display according to a first embodiment of the invention. The view from the adjacent front corner being a mirror image thereof.
FIG. 2 is a front perspective view of a portable banner display according to a second embodiment of the invention. The view from the adjacent front corner being a mirror image thereof.
FIG. 3 is a front perspective view of a portable banner display according to a third embodiment of the invention. The view from the adjacent front corner being a mirror image thereof.
FIG. 4 is a front perspective view of a portable banner display according to a fourth embodiment of the invention. The view from the adjacent front corner being a mirror image thereof.
FIG. 5 is a back elevational view of a portable banner display according to the first and second embodiments of the invention.
FIG. 6 is a back elevational view of a portable banner display according to the third and fourth embodiments of the invention; and,
FIG. 7 is a side elevational view of a portable banner display according to the first, second, third and fourth embodiments of the invention.
The view from the opposite side being a minor image thereof.
In the drawings, the broken lines represent portions of the portable banner display which form no part of the claimed design.