Multi-paneled signage substrate and method for making the same

An article, comprising:

• a plurality of panels, wherein each panel comprises a first edge having a first hollow and longitudinally extending protrusion adjacent thereto and a second edge having a second hollow and longitudinally extending protrusion adjacent thereto, wherein each of said first and second protrusions has first and second surfaces, wherein the second surface of each protrusion has a longitudinally extending indentation which is bound on a first side thereof by a longitudinally extending rounded surface, and wherein said plurality of panels are arranged in an abutting manner such that the first surface of at least one first protrusion and at least one second protrusion are disposed in an opposing relation to each other;
• and
• a coupler which extends over the rounded surfaces of said first and second protrusions, wherein said coupler is equipped with a first protuberance which engages the indented surface of said first protrusion.