COMPOSITE MATERIAL ORTHOTIC INSERT CONSTRUCTED FOR ENHANCED CONTROL AND DURABILITY

摘要

A composite material blank for an orthotic insert. The device is former of layers of fiberglass and graphite fiber material. A first graphite fiber layer provides the overall structure with increased strength, while secondary graphite fiber reinforcement strips are arranged below the first and fifth rays of the foot to provide additional rigidity and control in these areas. The edges of the graphite fiber layers are recessed inwardly from the edges of the fiberglass layers so as to provide a graphite-free border which prevents cracks from propagating into the graphite fiber layers. The layers are ended together by heat curing.