US Patent 9296461 Superpressure polyethylene balloon with load tapes

A balloon having a balloon envelope formed with a plurality of adjacent envelope gores sealed together at their respective edges to form an edge seam between each of the adjacent envelope gores, a tape comprised of fibers applied to a centerline of each of the envelope gores, wherein the envelope gores are constructed such that the edge seam between each of the adjacent envelope gores is longer than the centerline of each of the envelope gores, and wherein a load caused by pressurized lifting gas within the balloon envelope is carried primarily by the fiber tapes on the centerlines of the envelope gores, rather than the edge seams between the adjacent envelope gores.