US Patent 11325772 Box defining walls with insulation cavities

A method of assembling a box from a blank including obtaining a blank including a plurality of outer side panels, the outer side panels connected to each other by a plurality of fold lines, a plurality of outer bottom panels each joined to each of the outer side panels by a fold line, a plurality of connecting strips each joined to each of the outer side panels by a fold line, a plurality of inner side panels each joined to each of the connecting strips by a fold line, and a plurality of inner bottom panels each joined to each of the inner side panels by a fold line; and joining the outer side panels at opposite ends such that the outer side panels form a ring.