Patent attributes
A joining structure, having a sleeve having a first end, a second end, and at least first side; at least one spacer; wherein the sleeve connects a first mullion from the first end of the sleeve and connects a second mullion from the second end of the sleeve; wherein the sleeve extends longitudinally within the first and the second mullions; wherein the at least one spacer extends longitudinally along the length of the at least first side of the sleeve and is situated between an external surface of the at least first side of the sleeve and an internal surface of at least first wall of the first mullion and an internal surface of at least first wall of the second mullion; and wherein the at least one spacer prevents direct mating between the at least first side of the sleeve and the at least first wall of the first mullion and the at least first wall of the second mullion.
