(under subclass 186.1) Devices comprising edgings and midribs which are thickening of the fabric itself or modifications along the edges or the center for the purpose usually of
strengthening the fabric at those points or making a smooth guard edge; or center strips which are changes in the nature of the fabric along a central line for the purpose of introducing some degree of independence between the two halves of the surface.
SEE OR SEARCH THIS CLASS, SUBCLASS:
193, for high edge guards.
226+, for separate elements inserted in or near the edge of the fabric to strengthen it.